:root {
      color-scheme: dark;
      --bg-base: #090a0c;
      --bg-surface: #121316;
      --bg-surface-elevated: #18191f;
      --panel-bg: rgba(20, 21, 24, 0.85);
      --panel-border: #2c2d33;
      --panel-border-subtle: rgba(255, 255, 255, 0.08);
      --panel-border-hover: #40424a;
      
      --text-primary: #f3f4f6;
      --text-secondary: #d1d5db;
      --text-muted: #9ca3af;
      
      --music-blue: #00f0ff;
      --music-glow: rgba(0, 240, 255, 0.45);
      --pitch-green: #33ff33;
      --pitch-green-glow: rgba(51, 255, 51, 0.35);
      --caseycase-cyan: #4fa2b8;
      --caseycase-glow: rgba(79, 162, 184, 0.35);
      --liambot-violet: #a5b4fc;
      --liambot-glow: rgba(165, 180, 252, 0.22);

      --accent-cyan: #38bdf8;
      --accent-cyan-glow: rgba(56, 189, 248, 0.25);
      --accent-pink: #ff3388;
      --accent-pink-glow: rgba(255, 51, 136, 0.35);
      --accent-violet: #c4b5fd;
      --accent-amber: #e5c07b;
      --accent-green: #86efac;
      --accent-green-glow: rgba(134, 239, 172, 0.25);

      /* Dynamic Tab-Synchronized Theme Variables (Defaults to 80s Terminal White-Blue for Music Player) */
      --active-accent: var(--music-blue);
      --active-accent-glow: var(--music-glow);
      --active-accent-border: rgba(0, 240, 255, 0.35);
      --active-accent-border-subtle: rgba(0, 240, 255, 0.2);
      --active-accent-bg: rgba(0, 240, 255, 0.12);
      --active-accent-bg-hover: rgba(0, 240, 255, 0.15);
      --active-accent-bg-active: rgba(0, 240, 255, 0.2);
      
      --font-heading: 'Orbitron', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      --font-mono: 'JetBrains Mono', 'Courier New', Courier, monospace;
      --font-arcade: 'Press Start 2P', 'Courier New', Courier, monospace;
      --font-retro: 'VT323', 'Courier New', Courier, monospace;
      --font-simplane-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      --font-simplane-mono: 'SF Mono', 'Roboto Mono', 'JetBrains Mono', 'Fira Code', Menlo, Monaco, Consolas, monospace;
      --font-caseycase: 'Audiowide', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      --help-scroll-offset: 140px;
      --mobile-primary-nav-height: 52px;
      --active-app-font: var(--font-heading);
    }

    /* Tab-Synchronized Theme Variable Overrides */
    html[data-active-tab="simplane"],
    body[data-active-tab="simplane"] {
      --active-accent: #00d2ff;
      --active-accent-glow: rgba(0, 210, 255, 0.4);
      --active-accent-border: rgba(0, 210, 255, 0.35);
      --active-accent-border-subtle: rgba(0, 210, 255, 0.2);
      --active-accent-bg: rgba(0, 210, 255, 0.1);
      --active-accent-bg-hover: rgba(0, 210, 255, 0.15);
      --active-accent-bg-active: rgba(0, 210, 255, 0.22);
      --active-app-font: var(--font-simplane-mono);
    }
    html[data-active-tab="caseycase"],
    body[data-active-tab="caseycase"] {
      --active-accent: var(--caseycase-cyan);
      --active-accent-glow: var(--caseycase-glow);
      --active-accent-border: rgba(79, 162, 184, 0.35);
      --active-accent-border-subtle: rgba(79, 162, 184, 0.2);
      --active-accent-bg: rgba(79, 162, 184, 0.12);
      --active-accent-bg-hover: rgba(79, 162, 184, 0.16);
      --active-accent-bg-active: rgba(79, 162, 184, 0.24);
      --active-app-font: var(--font-caseycase);
    }

    html[data-active-tab="liambot"],
    body[data-active-tab="liambot"] {
      --active-accent: var(--liambot-violet);
      --active-accent-glow: var(--liambot-glow);
      --active-accent-border: rgba(165, 180, 252, 0.3);
      --active-accent-border-subtle: rgba(165, 180, 252, 0.18);
      --active-accent-bg: rgba(165, 180, 252, 0.1);
      --active-accent-bg-hover: rgba(165, 180, 252, 0.15);
      --active-accent-bg-active: rgba(165, 180, 252, 0.2);
      --active-app-font: var(--font-heading);
    }

    html[data-active-tab="football"],
    body[data-active-tab="football"] {
      --active-accent: var(--pitch-green);
      --active-accent-glow: var(--pitch-green-glow);
      --active-accent-border: rgba(51, 255, 51, 0.3);
      --active-accent-border-subtle: rgba(51, 255, 51, 0.2);
      --active-accent-bg: rgba(51, 255, 51, 0.12);
      --active-accent-bg-hover: rgba(51, 255, 51, 0.15);
      --active-accent-bg-active: rgba(51, 255, 51, 0.2);
      --active-app-font: var(--font-arcade);
    }

    html[data-active-tab="music"],
    html[data-active-tab="home"],
    body[data-active-tab="music"],
    body[data-active-tab="home"] {
      --active-accent: var(--music-blue);
      --active-accent-glow: var(--music-glow);
      --active-accent-border: rgba(0, 240, 255, 0.35);
      --active-accent-border-subtle: rgba(0, 240, 255, 0.2);
      --active-accent-bg: rgba(0, 240, 255, 0.12);
      --active-accent-bg-hover: rgba(0, 240, 255, 0.15);
      --active-accent-bg-active: rgba(0, 240, 255, 0.2);
      --active-app-font: var(--font-retro);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-base);
    }

    body {
      background-color: var(--bg-base);
      color: var(--text-primary);
      font-family: var(--font-body);
      line-height: 1.6;
      min-height: 100vh;
      position: relative;
    }

    /* Ambient Space Canvas Background */
    .bg-nebula {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      pointer-events: none;
      z-index: -1;
      background-image: 
        radial-gradient(ellipse 80% 50% at 75% 20%, rgba(82, 14, 67, 0.18) 0%, transparent 60%),
        radial-gradient(ellipse 70% 60% at 20% 70%, rgba(26, 34, 94, 0.22) 0%, transparent 70%),
        radial-gradient(ellipse 60% 40% at 85% 85%, rgba(12, 61, 58, 0.14) 0%, transparent 60%),
        radial-gradient(circle at 50% 50%, #070a14 0%, #020306 100%);
    }

    .bg-stars {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      pointer-events: none;
      z-index: -1;
      opacity: 0.55;
      background-image: radial-gradient(1.5px 1.5px at 40px 60px, #ffffff, rgba(0,0,0,0)),
                        radial-gradient(1px 1px at 120px 180px, #aaccff, rgba(0,0,0,0)),
                        radial-gradient(2px 2px at 250px 90px, #33ff33, rgba(0,0,0,0)),
                        radial-gradient(1px 1px at 380px 240px, #ffffff, rgba(0,0,0,0)),
                        radial-gradient(1.5px 1.5px at 500px 120px, #ffd8a8, rgba(0,0,0,0)),
                        radial-gradient(1px 1px at 620px 310px, #00d4ff, rgba(0,0,0,0)),
                        radial-gradient(2px 2px at 780px 70px, #ffffff, rgba(0,0,0,0)),
                        radial-gradient(1px 1px at 890px 210px, #ff99cc, rgba(0,0,0,0));
      background-size: 950px 450px;
    }

    .bg-grain {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      pointer-events: none;
      z-index: -1;
      opacity: 0.04;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.80' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    }

    /* Container */
    .container {
      max-width: 1100px;
      margin: 0 auto;
      padding: 0 1.25rem;
    }

    /* Floating Header Card */
    header.site-header {
      position: relative;
      z-index: 100;
      background: var(--panel-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--panel-border);
      border-radius: 0;
      padding: 1rem 1.5rem;
      margin-top: 1.25rem;
      margin-bottom: 1.25rem;
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    }

    header.site-header:has(.app-nav-modal.visible),
    header.site-header:has(.app-nav-container.active) {
      z-index: 10000;
    }

    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
    }

    .brand-group {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      text-decoration: none;
    }

    .brand-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      background: var(--active-accent-bg);
      border: 1px solid var(--active-accent-border);
      border-radius: 0;
      color: var(--active-accent);
      box-shadow: 0 0 12px var(--active-accent-glow);
      flex-shrink: 0;
      transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 4px;
    }

    /* Header Brand Styling - Fixed Line-Heights & Constant Spacing Across Fonts */
    .brand-title {
      font-family: var(--font-retro);
      font-weight: 400;
      font-size: 1.45rem;
      height: 20px;
      line-height: 20px;
      color: var(--text-primary);
      letter-spacing: 0.06em;
      display: flex;
      align-items: center;
      margin: 0;
      font-size-adjust: from-font;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      text-rendering: optimizeLegibility;
      transition: color 0.2s ease;
    }

    .brand-title span {
      color: var(--active-accent);
      transition: color 0.2s ease;
    }

    .brand-subtitle {
      font-family: var(--font-retro);
      font-size: 0.95rem;
      height: 14px;
      line-height: 14px;
      color: var(--text-secondary);
      letter-spacing: 0.05em;
      text-transform: uppercase;
      display: flex;
      align-items: center;
      margin: 0;
      font-size-adjust: from-font;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      text-rendering: optimizeLegibility;
      transition: color 0.2s ease;
    }

    html[data-active-tab="music"] .brand-title,
    html[data-active-tab="home"] .brand-title,
    body[data-active-tab="music"] .brand-title,
    body[data-active-tab="home"] .brand-title {
      font-family: var(--font-retro);
      font-weight: 400;
      font-size: 1.45rem;
      height: 20px;
      line-height: 20px;
      letter-spacing: 0.06em;
    }

    html[data-active-tab="music"] .brand-subtitle,
    html[data-active-tab="home"] .brand-subtitle,
    body[data-active-tab="music"] .brand-subtitle,
    body[data-active-tab="home"] .brand-subtitle {
      font-family: var(--font-retro);
      font-size: 0.95rem;
      height: 14px;
      line-height: 14px;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    html[data-active-tab="football"] .brand-title,
    body[data-active-tab="football"] .brand-title {
      font-family: var(--font-arcade);
      font-weight: 400;
      font-size: 0.92rem;
      height: 20px;
      line-height: 20px;
      letter-spacing: 0.04em;
    }

    html[data-active-tab="football"] .brand-subtitle,
    body[data-active-tab="football"] .brand-subtitle {
      font-family: var(--font-arcade);
      font-size: 0.58rem;
      height: 14px;
      line-height: 14px;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    html[data-active-tab="caseycase"] .brand-title,
    body[data-active-tab="caseycase"] .brand-title {
      font-family: var(--font-caseycase);
      font-weight: 700;
      font-size: 1.20rem;
      height: 20px;
      line-height: 20px;
      letter-spacing: 0.04em;
    }

    html[data-active-tab="caseycase"] .brand-subtitle,
    body[data-active-tab="caseycase"] .brand-subtitle {
      font-family: var(--font-mono);
      font-size: 0.68rem;
      height: 14px;
      line-height: 14px;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    html[data-active-tab="liambot"] .brand-title,
    body[data-active-tab="liambot"] .brand-title {
      font-family: var(--font-heading);
      font-weight: 800;
      font-size: 1.20rem;
      height: 20px;
      line-height: 20px;
      letter-spacing: 0.04em;
    }

    html[data-active-tab="liambot"] .brand-subtitle,
    body[data-active-tab="liambot"] .brand-subtitle {
      font-family: var(--font-mono);
      font-size: 0.68rem;
      height: 14px;
      line-height: 14px;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    html[data-active-tab="simplane"] .brand-title,
    body[data-active-tab="simplane"] .brand-title {
      font-family: var(--font-simplane-sans);
      font-weight: 700;
      font-size: 1.22rem;
      height: 20px;
      line-height: 20px;
      letter-spacing: 0.04em;
    }

    html[data-active-tab="simplane"] .brand-subtitle,
    body[data-active-tab="simplane"] .brand-subtitle {
      font-family: var(--font-simplane-mono);
      font-size: 0.68rem;
      height: 14px;
      line-height: 14px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    /* Header Actions & App Navigation Menu */
    .header-actions {
      display: flex;
      align-items: center;
      gap: 0.65rem;
      position: relative;
      z-index: 100;
    }

    .header-action-btn {
      width: 34px;
      height: 34px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--panel-border);
      color: var(--text-primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.2s ease;
      text-decoration: none;
      padding: 0;
      border-radius: 0;
    }

    .header-action-btn svg {
      width: 17px;
      height: 17px;
    }

    .header-action-btn:hover {
      background: var(--active-accent-bg-hover);
      border-color: var(--active-accent);
      color: var(--active-accent);
      transform: translateY(-1px);
    }

    .header-action-btn.active {
      background: var(--active-accent-bg-active);
      border-color: var(--active-accent);
      color: var(--active-accent);
      box-shadow: 0 0 12px var(--active-accent-glow);
    }

    .app-nav-container {
      position: relative;
      display: inline-flex;
      align-items: center;
      z-index: 100;
    }

    .app-nav-container.active,
    .app-nav-container:has(.app-nav-modal.visible) {
      z-index: 10000;
    }

    .app-nav-modal {
      position: absolute;
      top: calc(100% + 8px);
      right: 0;
      z-index: 10000;
      background: rgba(15, 20, 28, 0.96);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--active-accent-border);
      padding: 10px 8px;
      width: 255px;
      max-width: calc(100vw - 2rem);
      opacity: 0;
      pointer-events: none;
      transform: translateY(-6px);
      transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease, box-shadow 0.25s ease;
      text-align: left;
      user-select: none;
      font-family: var(--font-body);
      border-radius: 0;
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.65), 0 0 20px var(--active-accent-glow);
    }

    .app-nav-modal.visible {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
      z-index: 10000;
    }

    .app-nav-title {
      font-family: var(--active-app-font, var(--font-heading));
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--active-accent);
      padding: 3px 8px 6px 8px;
      border-bottom: 1px solid var(--active-accent-border-subtle);
      margin-bottom: 5px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: color 0.25s ease, border-color 0.25s ease;
    }

    .app-nav-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 3px;
    }

    .app-nav-item {
      margin: 0;
      padding: 0;
    }

    .app-nav-link {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      padding: 6px 8px;
      color: var(--text-primary);
      text-decoration: none;
      border: 1px solid transparent;
      transition: all 0.15s ease;
      cursor: pointer;
      border-radius: 0;
    }

    .app-nav-icon {
      width: 30px;
      height: 30px;
      margin-top: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      border: 1px solid rgba(255, 255, 255, 0.12);
      background: rgba(255, 255, 255, 0.04);
      border-radius: 0;
      transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
    }

    .app-nav-icon svg {
      width: 22px;
      height: 22px;
      display: block;
    }

    .app-nav-icon.icon-1kx {
      color: #00f0ff;
      border-color: rgba(0, 240, 255, 0.25);
      background: rgba(0, 240, 255, 0.08);
    }

    .app-nav-icon.icon-1kx svg {
      width: 24px;
      height: 24px;
    }

    .app-nav-icon.icon-football {
      color: #33ff33;
      border-color: rgba(51, 255, 51, 0.25);
      background: rgba(51, 255, 51, 0.08);
    }

    .app-nav-icon.icon-football svg {
      width: 18px;
      height: 18px;
    }

    .app-nav-icon.icon-caseyland {
      color: #ff88ff;
      border-color: rgba(255, 0, 255, 0.25);
      background: rgba(255, 0, 255, 0.08);
    }

    .app-nav-icon.icon-caseyland svg {
      width: 28px;
      height: 28px;
    }

    .app-nav-icon.icon-liambot {
      color: #a5b4fc;
      border-color: rgba(165, 180, 252, 0.25);
      background: rgba(165, 180, 252, 0.08);
    }

    .app-nav-icon.icon-caseycase {
      color: #7ed2e6;
      border-color: rgba(79, 162, 184, 0.25);
      background: rgba(79, 162, 184, 0.08);
    }

    .app-nav-icon.icon-caseycase svg {
      width: 24px;
      height: 24px;
    }

    .app-nav-icon.icon-casey {
      color: #13f8f1;
      border-color: rgba(19, 248, 241, 0.25);
      background: rgba(19, 248, 241, 0.08);
    }

    .app-nav-icon.icon-casey svg {
      width: 20px;
      height: 20px;
    }

    .app-nav-link:hover .app-nav-icon.icon-1kx {
      border-color: rgba(0, 240, 255, 0.6);
      background: rgba(0, 240, 255, 0.16);
      box-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
    }

    .app-nav-link:hover .app-nav-icon.icon-football {
      border-color: rgba(51, 255, 51, 0.6);
      background: rgba(51, 255, 51, 0.16);
      box-shadow: 0 0 6px rgba(51, 255, 51, 0.3);
    }

    .app-nav-link:hover .app-nav-icon.icon-caseyland {
      border-color: rgba(255, 0, 255, 0.6);
      background: rgba(255, 0, 255, 0.16);
      box-shadow: 0 0 6px rgba(255, 0, 255, 0.3);
    }

    .app-nav-link:hover .app-nav-icon.icon-liambot {
      border-color: rgba(165, 180, 252, 0.6);
      background: rgba(165, 180, 252, 0.16);
      box-shadow: 0 0 6px rgba(165, 180, 252, 0.3);
    }

    .app-nav-link:hover .app-nav-icon.icon-caseycase {
      border-color: rgba(79, 162, 184, 0.6);
      background: rgba(79, 162, 184, 0.16);
      box-shadow: 0 0 6px rgba(79, 162, 184, 0.3);
    }

    .app-nav-link:hover .app-nav-icon.icon-casey {
      border-color: rgba(19, 248, 241, 0.6);
      background: rgba(19, 248, 241, 0.16);
      box-shadow: 0 0 6px rgba(19, 248, 241, 0.3);
    }

    .app-nav-text-col {
      display: flex;
      flex-direction: column;
      gap: 2px;
      width: 100%;
    }

    .app-nav-header-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .app-nav-name {
      font-family: var(--active-app-font, var(--font-heading));
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--active-accent);
      display: flex;
      align-items: center;
      gap: 5px;
      transition: color 0.15s ease, text-shadow 0.15s ease;
    }

    .app-nav-sub {
      font-family: var(--font-body);
      font-size: 0.68rem;
      color: var(--text-secondary);
      line-height: 1.25;
      font-weight: 400;
      transition: color 0.15s ease;
    }

    .app-nav-link:hover {
      background: var(--active-accent-bg);
      border-color: var(--active-accent-border);
      transform: translateX(-2px);
    }

    .app-nav-link:hover .app-nav-name {
      color: #ffffff;
      text-shadow: 0 0 8px var(--active-accent-glow);
    }

    .app-nav-link:hover .app-nav-sub {
      color: #ffffff;
    }

    .app-nav-link:active {
      transform: scale(0.98);
    }

    .app-nav-ext {
      opacity: 0.6;
      color: var(--active-accent);
      transition: opacity 0.15s ease, transform 0.15s ease, color 0.25s ease;
    }

    .app-nav-link:hover .app-nav-ext {
      opacity: 1;
      transform: translate(1px, -1px);
    }

    /* Tab-Synchronized App Menu Typography & Layout Overrides */
    html[data-active-tab="music"] .app-nav-title,
    html[data-active-tab="home"] .app-nav-title,
    body[data-active-tab="music"] .app-nav-title,
    body[data-active-tab="home"] .app-nav-title {
      font-family: var(--font-retro);
      font-size: 0.95rem;
      letter-spacing: 0.08em;
      font-weight: 400;
      color: var(--music-blue);
      text-shadow: 0 0 8px var(--music-glow);
    }
    html[data-active-tab="music"] .app-nav-name,
    html[data-active-tab="home"] .app-nav-name,
    body[data-active-tab="music"] .app-nav-name,
    body[data-active-tab="home"] .app-nav-name {
      font-family: var(--font-retro);
      font-size: 1.15rem;
      letter-spacing: 0.04em;
      font-weight: 400;
      color: var(--music-blue);
      text-shadow: 0 0 6px var(--music-glow);
      line-height: 1.25;
    }
    html[data-active-tab="music"] .app-nav-link:hover .app-nav-name,
    html[data-active-tab="home"] .app-nav-link:hover .app-nav-name,
    body[data-active-tab="music"] .app-nav-link:hover .app-nav-name,
    body[data-active-tab="home"] .app-nav-link:hover .app-nav-name {
      color: #ffffff;
      text-shadow: 0 0 10px var(--music-glow);
    }

    html[data-active-tab="football"] .app-nav-title,
    body[data-active-tab="football"] .app-nav-title {
      font-family: var(--font-arcade);
      font-size: 0.60rem;
      letter-spacing: 0.04em;
      font-weight: 400;
      color: var(--pitch-green);
      text-shadow: 0 0 6px var(--pitch-green-glow);
    }
    html[data-active-tab="football"] .app-nav-name,
    body[data-active-tab="football"] .app-nav-name {
      font-family: var(--font-arcade);
      font-size: 0.66rem;
      letter-spacing: 0.02em;
      font-weight: 400;
      color: var(--pitch-green);
      text-shadow: 0 0 4px var(--pitch-green-glow);
      line-height: 1.35;
    }
    html[data-active-tab="football"] .app-nav-sub,
    body[data-active-tab="football"] .app-nav-sub {
      font-family: var(--font-mono);
      font-size: 0.64rem;
      color: var(--text-secondary);
    }
    html[data-active-tab="football"] .app-nav-link:hover .app-nav-name,
    body[data-active-tab="football"] .app-nav-link:hover .app-nav-name {
      color: #ffffff;
      text-shadow: 0 0 8px var(--pitch-green-glow);
    }
    html[data-active-tab="football"] .app-nav-link:hover .app-nav-sub,
    body[data-active-tab="football"] .app-nav-link:hover .app-nav-sub {
      color: #ffffff;
    }

    html[data-active-tab="caseycase"] .app-nav-title,
    body[data-active-tab="caseycase"] .app-nav-title {
      font-family: var(--font-caseycase);
      font-size: 0.70rem;
      letter-spacing: 0.06em;
      font-weight: 700;
      color: var(--caseycase-cyan);
      text-shadow: 0 0 8px var(--caseycase-glow);
    }
    html[data-active-tab="caseycase"] .app-nav-name,
    body[data-active-tab="caseycase"] .app-nav-name {
      font-family: var(--font-caseycase);
      font-size: 0.82rem;
      letter-spacing: 0.03em;
      font-weight: 600;
      color: var(--caseycase-cyan);
      text-shadow: 0 0 6px var(--caseycase-glow);
      line-height: 1.25;
    }
    html[data-active-tab="caseycase"] .app-nav-link:hover .app-nav-name,
    body[data-active-tab="caseycase"] .app-nav-link:hover .app-nav-name {
      color: #ffffff;
      text-shadow: 0 0 8px var(--caseycase-glow);
    }

    html[data-active-tab="liambot"] .app-nav-title,
    body[data-active-tab="liambot"] .app-nav-title {
      font-family: var(--font-heading);
      font-size: 0.72rem;
      letter-spacing: 0.08em;
      font-weight: 700;
      color: var(--liambot-violet);
      text-shadow: 0 0 8px var(--liambot-glow);
    }
    html[data-active-tab="liambot"] .app-nav-name,
    body[data-active-tab="liambot"] .app-nav-name {
      font-family: var(--font-heading);
      font-size: 0.85rem;
      letter-spacing: 0.02em;
      font-weight: 600;
      color: var(--liambot-violet);
      text-shadow: 0 0 6px var(--liambot-glow);
    }
    html[data-active-tab="liambot"] .app-nav-link:hover .app-nav-name,
    body[data-active-tab="liambot"] .app-nav-link:hover .app-nav-name {
      color: #ffffff;
      text-shadow: 0 0 8px var(--liambot-glow);
    }

    html[data-active-tab="simplane"] .app-nav-title,
    body[data-active-tab="simplane"] .app-nav-title {
      font-family: var(--font-simplane-mono);
      font-size: 0.70rem;
      letter-spacing: 0.08em;
      font-weight: 700;
      color: #00d2ff;
      text-shadow: 0 0 8px rgba(0, 210, 255, 0.4);
    }
    html[data-active-tab="simplane"] .app-nav-name,
    body[data-active-tab="simplane"] .app-nav-name {
      font-family: var(--font-simplane-mono);
      font-size: 0.80rem;
      letter-spacing: 0.04em;
      font-weight: 700;
      color: #00d2ff;
      text-shadow: 0 0 6px rgba(0, 210, 255, 0.4);
    }
    html[data-active-tab="simplane"] .app-nav-sub,
    body[data-active-tab="simplane"] .app-nav-sub {
      font-family: var(--font-simplane-sans);
      font-size: 0.68rem;
      color: var(--text-secondary);
    }
    html[data-active-tab="simplane"] .app-nav-link:hover .app-nav-name,
    body[data-active-tab="simplane"] .app-nav-link:hover .app-nav-name {
      color: #ffffff;
      text-shadow: 0 0 8px rgba(0, 210, 255, 0.4);
    }

    /* Tab Switcher (Full-Width Sticky Button Bar) */
    .tab-switcher-container {
      position: sticky;
      top: 0;
      z-index: 95;
      width: 100%;
      display: flex;
      margin: 0 0 1.25rem 0;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
    }

    .tab-switcher {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      width: 100%;
      background: rgba(20, 21, 24, 0.95);
      border: 1px solid var(--panel-border);
      border-radius: 0;
      padding: 0.35rem;
      gap: 0.35rem;
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    }

    /* All 5 items in one row on desktop when SimPlane tab is present / active */
    html[data-dev="true"] .tab-switcher,
    body[data-dev="true"] .tab-switcher,
    html[data-active-tab="simplane"] .tab-switcher,
    body[data-active-tab="simplane"] .tab-switcher,
    .tab-switcher:has(#tab-simplane:not(.dev-only-tab)),
    .tab-switcher:has(#tab-simplane.active) {
      grid-template-columns: repeat(5, 1fr);
    }

    .tab-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      gap: 0.6rem;
      background: transparent;
      border: 1px solid transparent;
      color: var(--text-secondary);
      font-family: var(--font-heading);
      font-size: 0.88rem;
      font-weight: 700;
      letter-spacing: 0.03em;
      padding: 0.6rem 1rem;
      border-radius: 0;
      cursor: pointer;
      text-decoration: none;
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      user-select: none;
      white-space: nowrap;
    }

    .tab-btn:hover {
      color: #ffffff;
      background: rgba(255, 255, 255, 0.05);
    }

    .tab-btn.home-tab,
    .tab-btn#tab-music {
      font-family: var(--font-retro);
      font-size: 1.15rem;
      letter-spacing: 0.06em;
      font-weight: 400;
    }

    .tab-btn.football-tab,
    .tab-btn#tab-football {
      font-family: var(--font-arcade);
      font-size: 0.68rem;
      letter-spacing: 0.04em;
      font-weight: 400;
    }

    .tab-btn.caseycase-tab,
    .tab-btn#tab-caseycase {
      font-family: var(--font-caseycase);
      font-size: 0.88rem;
      letter-spacing: 0.03em;
      font-weight: 700;
    }

    .tab-btn.liambot-tab,
    .tab-btn#tab-liambot {
      font-family: var(--font-heading);
      font-size: 0.88rem;
      letter-spacing: 0.03em;
      font-weight: 700;
    }

    .tab-btn.simplane-tab,
    .tab-btn#tab-simplane {
      font-family: var(--font-simplane-mono);
      font-size: 0.82rem;
      letter-spacing: 0.04em;
      font-weight: 700;
    }

    .tab-btn svg {
      transition: color 0.2s ease, filter 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
      opacity: 0.85;
    }

    .tab-btn:hover svg,
    .tab-btn.active svg {
      opacity: 1;
      transform: scale(1.08);
    }

    .tab-btn.home-tab svg,
    .tab-btn#tab-music svg {
      color: #00f0ff;
      filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.45));
    }

    .tab-btn.football-tab svg,
    .tab-btn#tab-football svg {
      color: #34d399;
      filter: drop-shadow(0 0 6px rgba(34, 197, 94, 0.45));
    }

    .tab-btn.liambot-tab svg,
    .tab-btn#tab-liambot svg {
      color: #a5b4fc;
      filter: drop-shadow(0 0 6px rgba(165, 180, 252, 0.45));
    }

    .tab-btn.caseycase-tab svg,
    .tab-btn#tab-caseycase svg {
      color: #4fa2b8;
      filter: drop-shadow(0 0 6px rgba(79, 162, 184, 0.45));
    }

    .tab-btn.simplane-tab svg,
    .tab-btn#tab-simplane svg {
      color: #38bdf8;
      filter: drop-shadow(0 0 6px rgba(56, 189, 248, 0.45));
    }

    .tab-btn.active,
    .tab-btn.home-tab.active {
      background: rgba(0, 240, 255, 0.14);
      border-color: var(--music-blue);
      color: var(--music-blue);
      box-shadow: 0 0 16px var(--music-glow);
    }

    .tab-btn.football-tab.active {
      background: rgba(51, 255, 51, 0.14);
      border-color: var(--pitch-green);
      color: var(--pitch-green);
      box-shadow: 0 0 16px var(--pitch-green-glow);
    }

    .tab-btn.caseycase-tab.active {
      background: rgba(79, 162, 184, 0.14);
      border-color: var(--caseycase-cyan);
      color: var(--caseycase-cyan);
      box-shadow: 0 0 16px var(--caseycase-glow);
    }

    .tab-btn.liambot-tab.active {
      background: rgba(165, 180, 252, 0.12);
      border-color: var(--liambot-violet);
      color: var(--liambot-violet);
      box-shadow: 0 0 12px var(--liambot-glow);
    }

    .tab-btn.simplane-tab.active {
      background: rgba(56, 189, 248, 0.14);
      border-color: #38bdf8;
      color: #38bdf8;
      box-shadow: 0 0 16px rgba(56, 189, 248, 0.35);
    }

    /* Dev-Only Tab Visibility Gate */
    .dev-only-tab {
      display: none !important;
    }

    html[data-dev="true"] .dev-only-tab,
    body[data-dev="true"] .dev-only-tab,
    .tab-btn.dev-only-tab.active {
      display: inline-flex !important;
    }

    .tab-dev-badge,
    .tab-beta-badge {
      font-family: var(--font-sans);
      font-size: 0.60rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      padding: 1px 4px;
      background: rgba(255, 171, 0, 0.18);
      border: 1px solid var(--accent-amber);
      color: var(--accent-amber);
      margin-left: 6px;
      line-height: 1.1;
      text-transform: uppercase;
      border-radius: 0;
    }

    .hero h1.caseycase-hero-title {
      font-family: var(--font-caseycase);
      color: var(--caseycase-cyan);
      text-shadow: 0 0 24px var(--caseycase-glow);
      text-align: left;
    }

    .hero h1.liambot-hero-title {
      color: var(--liambot-violet);
      text-shadow: 0 0 16px var(--liambot-glow);
      text-align: left;
    }

    .hero h1.simplane-hero-title {
      font-family: var(--font-simplane-mono);
      font-weight: 800;
      font-size: clamp(1.8rem, 3.8vw, 2.5rem);
      letter-spacing: 0.06em;
      color: #00d2ff;
      text-shadow: 0 0 20px rgba(0, 210, 255, 0.4);
      text-align: left;
    }

    .simplane-pane .hero-app-icon {
      background: rgba(0, 210, 255, 0.12);
      border-color: rgba(0, 210, 255, 0.35);
      color: #00d2ff;
      box-shadow: 0 0 20px rgba(0, 210, 255, 0.2);
    }

    /* SimPlane Headings & Typography (Aviation Cockpit Monospace: SF Mono / Roboto Mono / JetBrains Mono) */
    .simplane-pane .section-title,
    .simplane-pane h1,
    .simplane-pane h2,
    .simplane-pane h3,
    .simplane-pane h4,
    .simplane-pane .feature-card-title,
    .simplane-pane th,
    .simplane-pane .changelog-summary,
    .simplane-pane .changelog-summary span {
      font-family: var(--font-simplane-mono);
      font-weight: 700;
      letter-spacing: 0.05em;
    }

    .simplane-pane .section-title,
    .simplane-pane h2 {
      font-size: 1.28rem;
      line-height: 1.25;
      letter-spacing: 0.05em;
      color: #00d2ff;
      text-shadow: 0 0 12px rgba(0, 210, 255, 0.35);
    }

    .simplane-pane .section-icon {
      color: #00d2ff;
    }

    .simplane-pane h3 {
      font-size: 1.05rem;
      letter-spacing: 0.04em;
      color: #38bdf8;
      margin: 1.5rem 0 0.6rem 0;
    }

    .simplane-pane h4 {
      font-size: 0.90rem;
      line-height: 1.35;
      letter-spacing: 0.04em;
      color: #7dd3fc;
    }

    .simplane-pane .feature-card-title {
      font-size: 0.92rem;
      line-height: 1.35;
      letter-spacing: 0.04em;
      color: #ffffff;
    }

    .simplane-pane th {
      font-size: 0.78rem;
      line-height: 1.4;
      letter-spacing: 0.06em;
      color: #00d2ff;
      text-transform: uppercase;
    }

    .simplane-pane .changelog-summary {
      font-size: 0.88rem;
      letter-spacing: 0.04em;
      color: #00d2ff;
    }

    /* SimPlane Body Prose & Technical Data (Native System Sans Stack) */
    .simplane-pane,
    .simplane-pane p,
    .simplane-pane li,
    .simplane-pane td {
      font-family: var(--font-simplane-sans);
    }

    .simplane-pane kbd {
      font-family: var(--font-simplane-mono);
      font-weight: 700;
      background: rgba(0, 210, 255, 0.08);
      border: 1px solid rgba(0, 210, 255, 0.3);
      color: #00d2ff;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    }

    .simplane-pane .feature-card:hover {
      border-color: rgba(0, 210, 255, 0.4);
      box-shadow: 0 4px 20px rgba(0, 210, 255, 0.15);
    }

    .simplane-pane .doc-accordion-details:hover {
      border-color: rgba(0, 210, 255, 0.35);
    }

    .simplane-pane .doc-accordion-details[open] {
      border-color: rgba(0, 210, 255, 0.45);
    }

    .simplane-pane .doc-accordion-details[open] .doc-accordion-chevron {
      color: #00d2ff;
    }

    .simplane-pane .doc-accordion-count-badge {
      font-family: var(--font-simplane-mono);
      background: rgba(0, 210, 255, 0.12);
      border: 1px solid rgba(0, 210, 255, 0.3);
      color: #00d2ff;
    }

    .simplane-pane .doc-accordion-details[open] .doc-accordion-count-badge {
      background: rgba(0, 210, 255, 0.22);
      border-color: #00d2ff;
      color: #ffffff;
    }

    .simplane-pane .patch-count-badge {
      font-family: var(--font-simplane-mono);
      font-weight: 700;
      letter-spacing: 0.05em;
    }

    .simplane-pane .older-releases-details[open] {
      border-color: rgba(0, 210, 255, 0.35);
    }

    .simplane-pane .older-releases-details[open] .changelog-chevron {
      color: #00d2ff;
    }

    /* SimPlane Fleet Table & Mini Plane Thumbnails */
    .fleet-aircraft-cell {
      display: flex;
      align-items: center;
      gap: 0.85rem;
    }

    .fleet-plane-thumb {
      width: 60px;
      height: 36px;
      flex-shrink: 0;
      background: #070c18;
      border: 1px solid rgba(0, 210, 255, 0.35);
      border-radius: 0;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
      transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
      object-fit: cover;
      display: block;
    }

    .fleet-aircraft-cell:hover .fleet-plane-thumb {
      border-color: #00d2ff;
      box-shadow: 0 0 10px rgba(0, 210, 255, 0.4);
      transform: scale(1.05);
    }

    .fleet-aircraft-info {
      display: flex;
      flex-direction: column;
      gap: 0.15rem;
      min-width: 0;
    }

    .fleet-aircraft-info strong {
      color: #ffffff;
      font-size: 0.92rem;
      line-height: 1.3;
    }

    .fleet-aircraft-callsign {
      font-family: var(--font-simplane-mono);
      font-size: 0.7rem;
      font-weight: 700;
      color: #00d2ff;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    /* CaseyCase Headings (Cyan Blue) */
    .caseycase-pane .section-title,
    .caseycase-pane h2,
    .caseycase-pane h3,
    .caseycase-pane h4,
    .caseycase-pane .changelog-summary span {
      color: var(--caseycase-cyan);
    }

    /* LiamBot Headings (Soft Lavender Purple) */
    .liambot-pane .section-title,
    .liambot-pane h2,
    .liambot-pane h3,
    .liambot-pane h4,
    .liambot-pane .changelog-summary span {
      color: var(--liambot-violet);
    }

    .caseycase-link {
      color: #f1f5f9;
      background: rgba(79, 162, 184, 0.08);
      border-color: rgba(79, 162, 184, 0.4);
    }

    .caseycase-link:hover {
      background: rgba(79, 162, 184, 0.22) !important;
      border-color: var(--caseycase-cyan) !important;
      color: #ffffff !important;
      box-shadow: 0 0 14px var(--caseycase-glow);
    }

    .liambot-link {
      color: #f1f5f9;
      background: rgba(165, 180, 252, 0.08);
      border-color: rgba(165, 180, 252, 0.35);
    }

    .liambot-link:hover {
      background: rgba(165, 180, 252, 0.22) !important;
      border-color: var(--liambot-violet) !important;
      color: #ffffff !important;
      box-shadow: 0 0 14px var(--liambot-glow);
    }

    .caseycase-icon {
      color: var(--caseycase-cyan);
    }

    .liambot-icon {
      color: var(--liambot-violet);
    }

    .caseycase-callout {
      border-color: var(--caseycase-cyan);
      background: rgba(79, 162, 184, 0.05);
    }

    .caseycase-callout .callout-icon {
      color: var(--caseycase-cyan);
    }

    .caseycase-table th {
      color: var(--caseycase-cyan);
      border-bottom: 2px solid var(--caseycase-cyan);
    }

    .liambot-table th {
      color: var(--liambot-violet);
      border-bottom: 2px solid var(--liambot-violet);
    }

    @media (hover: hover) and (pointer: fine) {
      .caseycase-pane .quick-nav-links a:hover {
        background: rgba(79, 162, 184, 0.1);
        border-color: rgba(79, 162, 184, 0.4);
        color: var(--caseycase-cyan, #00d4ff);
      }

      .liambot-pane .quick-nav-links a:hover {
        background: rgba(165, 180, 252, 0.1);
        border-color: rgba(165, 180, 252, 0.35);
        color: var(--liambot-violet, #a5b4fc);
      }
    }

    .badge-tag.violet {
      background: rgba(165, 180, 252, 0.12);
      border-color: rgba(165, 180, 252, 0.3);
      color: var(--liambot-violet);
    }

    /* LiamBot Passcode Authentication Card */
    .liam-auth-wrapper {
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 3.5rem 1rem 5rem 1rem;
      min-height: 400px;
    }

    .liam-auth-card {
      background: rgba(18, 19, 24, 0.95);
      border: 1px solid rgba(165, 180, 252, 0.35);
      box-shadow: 0 0 24px rgba(165, 180, 252, 0.15), inset 0 0 20px rgba(165, 180, 252, 0.04);
      border-radius: 0;
      padding: 2.25rem 2rem;
      max-width: 440px;
      width: 100%;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1.25rem;
    }

    .liam-auth-icon {
      width: 48px;
      height: 48px;
      background: rgba(165, 180, 252, 0.1);
      border: 1px solid rgba(165, 180, 252, 0.3);
      border-radius: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--liambot-violet);
      box-shadow: 0 0 12px var(--liambot-glow);
    }

    .liam-auth-title {
      font-family: var(--font-heading);
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text-primary);
      letter-spacing: 0.03em;
      margin: 0;
    }

    .liam-auth-desc {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.5;
      margin: 0;
    }

    .liam-auth-form {
      width: 100%;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .liam-input-group {
      position: relative;
      width: 100%;
    }

    .liam-passcode-input {
      width: 100%;
      padding: 0.75rem 2.75rem 0.75rem 1rem;
      background: rgba(0, 0, 0, 0.6);
      border: 1px solid var(--panel-border);
      border-radius: 0;
      color: #ffffff;
      font-family: var(--font-mono);
      font-size: 0.95rem;
      outline: none;
      box-sizing: border-box;
      transition: border-color 0.2s, box-shadow 0.2s;
    }

    .liam-passcode-input:focus {
      border-color: var(--liambot-violet);
      box-shadow: 0 0 12px var(--liambot-glow);
    }

    .liam-toggle-eye {
      position: absolute;
      right: 0.75rem;
      top: 50%;
      transform: translateY(-50%);
      background: none;
      border: none;
      color: var(--text-muted);
      cursor: pointer;
      padding: 0.25rem;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: color 0.15s;
    }

    .liam-toggle-eye:hover {
      color: var(--text-primary);
    }

    .liam-auth-btn {
      width: 100%;
      padding: 0.75rem 1.25rem;
      background: rgba(165, 180, 252, 0.15);
      border: 1px solid var(--liambot-violet);
      color: #ffffff;
      font-family: var(--font-heading);
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      cursor: pointer;
      border-radius: 0;
      transition: all 0.2s;
      user-select: none;
    }

    .liam-auth-btn:hover {
      background: var(--liambot-violet);
      color: #000000;
      box-shadow: 0 0 16px var(--liambot-glow);
    }

    .liam-auth-error {
      font-family: var(--font-mono);
      font-size: 0.78rem;
      color: #ff6b6b;
      min-height: 1.2rem;
      margin: 0;
    }

    .liam-lock-btn {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.26rem 0.6rem 0.28rem 0.6rem;
      background: rgba(255, 107, 107, 0.08);
      border: 1px solid rgba(255, 107, 107, 0.35);
      color: #ff6b6b;
      font-family: var(--font-heading);
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      line-height: 1;
      cursor: pointer;
      border-radius: 0;
      transition: all 0.2s ease;
      text-decoration: none;
      margin-bottom: 3px;
    }

    .liam-lock-btn:hover {
      background: rgba(255, 107, 107, 0.22) !important;
      border-color: #ff6b6b !important;
      color: #ffffff !important;
      box-shadow: 0 0 14px rgba(255, 107, 107, 0.4);
      transform: translateY(-1px);
    }












    .tab-btn.football-tab.active {
      background: rgba(51, 255, 51, 0.14);
      border-color: var(--pitch-green);
      color: var(--pitch-green);
      box-shadow: 0 0 16px var(--pitch-green-glow);
    }

    /* Hero Banner */
    .hero {
      padding: 1.5rem 0 2rem 0;
      text-align: left;
    }

    .hero h1 {
      font-family: var(--font-heading);
      font-size: clamp(1.75rem, 4.5vw, 2.75rem);
      font-weight: 800;
      letter-spacing: 0.02em;
      line-height: 1.15;
      margin-bottom: 1.25rem;
      color: var(--music-blue);
      text-shadow: 0 0 24px var(--music-glow);
      text-align: left;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      flex-wrap: wrap;
      width: 100%;
    }

    .hero h1.football-hero-title {
      font-family: var(--font-arcade);
      font-size: clamp(1.2rem, 3.2vw, 1.85rem);
      font-weight: 400;
      letter-spacing: 0.04em;
      line-height: 1.25;
      margin-bottom: 2.15rem;
      color: var(--pitch-green);
      text-shadow: 0 0 24px var(--pitch-green-glow);
      text-align: left;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      flex-wrap: wrap;
      width: 100%;
    }

    .hero-title-link {
      color: inherit;
      text-decoration: none;
      transition: opacity 0.2s ease, transform 0.2s ease, filter 0.2s ease;
      display: inline;
      cursor: pointer;
    }

    .hero-title-link:hover {
      opacity: 0.92;
      filter: brightness(1.2);
    }

    .hero-title-main {
      display: inline-flex;
      align-items: flex-start;
      gap: 0.65rem;
      flex-wrap: nowrap;
    }

    .hero-app-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 1.16em;
      height: 1.16em;
      flex-shrink: 0;
      position: relative;
      align-self: flex-start;
      margin-top: calc((1.15em - 1.16em) / 2);
      margin-top: calc((1lh - 1.16em) / 2);
    }

    .football-pane .hero-app-icon {
      margin-top: calc((1.25em - 1.16em) / 2);
      margin-top: calc((1lh - 1.16em) / 2);
    }

    .liambot-pane .hero-app-icon,
    .caseycase-pane .hero-app-icon {
      margin-top: calc((1.15em - 1.16em) / 2);
      margin-top: calc((1lh - 1.16em) / 2);
    }

    .hero-app-icon svg {
      width: 100%;
      height: 100%;
      display: block;
    }

    .hero-app-icon.music-app-icon {
      color: var(--music-blue);
      filter: drop-shadow(0 0 10px var(--music-glow));
    }

    .hero-app-icon.football-app-icon {
      color: var(--pitch-green);
      filter: drop-shadow(0 0 10px var(--pitch-green-glow));
    }

    .hero-app-icon.liambot-app-icon {
      color: var(--liambot-violet);
      filter: drop-shadow(0 0 10px var(--liambot-glow));
    }

    .hero-app-icon.caseycase-app-icon {
      color: var(--caseycase-cyan);
      filter: drop-shadow(0 0 10px var(--caseycase-glow));
    }

    .hero-actions-group {
      margin-left: auto;
      align-self: center;
      display: inline-flex;
      align-items: center;
      gap: 0.65rem;
      flex-wrap: wrap;
    }

    .app-direct-link {
      font-family: var(--font-mono);
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      line-height: 1;
      padding: 0.26rem 0.6rem 0.28rem 0.6rem;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      transition: all 0.2s ease;
      color: #f1f5f9;
      background: rgba(0, 240, 255, 0.08);
      border: 1px solid rgba(0, 240, 255, 0.4);
      margin-left: auto;
      align-self: center;
      vertical-align: middle;
      margin-bottom: 0;
    }

    .app-direct-link:hover {
      background: rgba(0, 240, 255, 0.22) !important;
      border-color: var(--music-blue) !important;
      color: #ffffff !important;
      box-shadow: 0 0 14px var(--music-glow);
      transform: translateY(-1px);
    }

    .music-pane .app-direct-link,
    #pane-music .app-direct-link {
      font-family: var(--font-retro);
      font-size: 1.15rem;
      letter-spacing: 0.06em;
      padding: 0.2rem 0.6rem;
    }

    .football-pane .app-direct-link {
      font-family: var(--font-arcade);
      font-size: 0.68rem;
      letter-spacing: 0.04em;
      color: #f1f5f9;
      background: rgba(51, 255, 51, 0.08);
      border: 1px solid rgba(51, 255, 51, 0.4);
    }

    .caseycase-pane .app-direct-link {
      font-family: var(--font-caseycase);
      font-size: 0.82rem;
      letter-spacing: 0.04em;
    }

    .liambot-pane .app-direct-link {
      font-family: var(--font-heading);
      font-size: 0.82rem;
      letter-spacing: 0.04em;
    }

    .simplane-pane .app-direct-link {
      font-family: var(--font-simplane-mono);
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      color: #00d2ff;
      background: rgba(0, 210, 255, 0.08);
      border: 1px solid rgba(0, 210, 255, 0.4);
    }

    .simplane-pane .app-direct-link:hover {
      background: rgba(0, 210, 255, 0.22) !important;
      border-color: #00d2ff !important;
      color: #ffffff !important;
      box-shadow: 0 0 14px rgba(0, 210, 255, 0.5);
    }

    .football-pane .app-direct-link:hover {
      background: rgba(51, 255, 51, 0.22) !important;
      border-color: var(--pitch-green) !important;
      color: #ffffff !important;
      box-shadow: 0 0 14px var(--pitch-green-glow);
    }

    .hero p {
      color: var(--text-secondary);
      font-size: clamp(1rem, 2vw, 1.15rem);
      max-width: 860px;
      margin: 0;
      line-height: 1.6;
      text-align: left;
    }

    /* Hero intro with a tabbed media panel to its right (SimPlane, T351). Both media are 20:9,
       so the frame keeps one height and switching tabs never moves the page below it. */
    .hero-intro {
      display: flex;
      align-items: flex-start;
      gap: 2rem;
    }

    .hero-intro > p {
      flex: 1 1 0;
      min-width: 0;
    }

    .hero-media {
      flex: 0 0 clamp(300px, 38%, 400px);
      min-width: 0;
    }

    .hero-media-tabs {
      display: flex;
      gap: 0.35rem;
      margin-bottom: 0.4rem;
    }

    .hero-media-tab {
      flex: 1 1 0;
      padding: 0.35rem 0.5rem;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 0;
      color: var(--text-muted);
      font-family: var(--font-simplane-mono);
      font-size: 0.7rem;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      white-space: nowrap;
      cursor: pointer;
      transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
    }

    .hero-media-tab:hover {
      background: rgba(0, 210, 255, 0.12);
      border-color: rgba(0, 210, 255, 0.4);
      color: #ffffff;
    }

    .hero-media-tab[aria-selected="true"] {
      background: rgba(0, 210, 255, 0.22);
      border-color: #00d2ff;
      color: #ffffff;
      box-shadow: 0 0 12px rgba(0, 210, 255, 0.3);
    }

    .hero-media-tab:focus-visible {
      outline: 2px solid #00d2ff;
      outline-offset: 2px;
    }

    .hero-media-panel {
      margin: 0;
    }

    .hero-media-frame {
      aspect-ratio: 20 / 9;
      overflow: hidden;
      background: #0b0d12;
      border: 1px solid var(--panel-border);
    }

    .hero-media-frame video,
    .hero-media-frame img {
      display: block;
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .hero-media-panel figcaption {
      margin-top: 0.45rem;
      color: var(--text-muted);
      font-family: var(--font-simplane-mono);
      font-size: 0.72rem;
      letter-spacing: 0.02em;
      line-height: 1.4;
    }

    /* Too narrow for two columns: the panel drops below the text. */
    @media (max-width: 860px) {
      .hero-intro {
        flex-direction: column;
        gap: 1.25rem;
      }

      .hero-media {
        flex: none;
        width: 100%;
        max-width: 560px;
      }
    }

    /* Tab Panes */
    .tab-pane {
      display: none;
      animation: fadeIn 0.25s ease forwards;
    }

    .tab-pane.active {
      display: block;
    }

    /* Synchronize initial active pane and tab with html[data-active-tab] before JS runs */
    html[data-active-tab="football"] #pane-music,
    html[data-active-tab="caseycase"] #pane-music,
    html[data-active-tab="liambot"] #pane-music,
    html[data-active-tab="simplane"] #pane-music {
      display: none;
    }
    html[data-active-tab="football"] #pane-football {
      display: block;
    }
    html[data-active-tab="caseycase"] #pane-caseycase {
      display: block;
    }
    html[data-active-tab="liambot"] #pane-liambot {
      display: block;
    }
    html[data-active-tab="simplane"] #pane-simplane {
      display: block;
    }
    html[data-active-tab="music"] #pane-music,
    html[data-active-tab="home"] #pane-music {
      display: block;
    }

    /* Synchronize LiamBot auth gate and protected docs before JS execution to eliminate CLS */
    html[data-liam-authed="true"] #liam-auth-gate {
      display: none !important;
    }
    html[data-liam-authed="true"] #liam-protected-docs {
      display: block !important;
    }

    html[data-active-tab="football"] #tab-music,
    html[data-active-tab="caseycase"] #tab-music,
    html[data-active-tab="liambot"] #tab-music,
    html[data-active-tab="simplane"] #tab-music {
      background: transparent;
      border-color: transparent;
      color: var(--text-secondary);
      box-shadow: none;
    }
    html[data-active-tab="football"] #tab-football {
      background: rgba(51, 255, 51, 0.14);
      border-color: var(--pitch-green);
      color: var(--pitch-green);
      box-shadow: 0 0 16px var(--pitch-green-glow);
    }
    html[data-active-tab="caseycase"] #tab-caseycase {
      background: rgba(79, 162, 184, 0.14);
      border-color: var(--caseycase-cyan);
      color: var(--caseycase-cyan);
      box-shadow: 0 0 16px var(--caseycase-glow);
    }
    html[data-active-tab="liambot"] #tab-liambot {
      background: rgba(165, 180, 252, 0.12);
      border-color: var(--liambot-violet);
      color: var(--liambot-violet);
      box-shadow: 0 0 12px var(--liambot-glow);
    }
    html[data-active-tab="simplane"] #tab-simplane {
      background: rgba(0, 210, 255, 0.14);
      border-color: #00d2ff;
      color: #00d2ff;
      box-shadow: 0 0 16px rgba(0, 210, 255, 0.4);
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* Quick Jump Navigation Bar (Full-Width Sticky Secondary Nav) */
    .quick-nav {
      position: sticky;
      top: 52px;
      z-index: 90;
      width: 100%;
      background: rgba(14, 16, 24, 0.95);
      border: 1px solid var(--panel-border);
      border-radius: 0;
      padding: 0.35rem;
      margin-bottom: 1.5rem;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    }

    /* Quick Jump Navigation Links: Standardized Full-Width Flex Spread (Zero Blank Spaces) */
    .quick-nav-links {
      display: flex;
      flex-wrap: wrap;
      gap: 0.35rem;
      width: 100%;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .quick-nav-links li {
      display: flex;
      flex: 1 1 180px;
      min-width: 0;
    }

    /* Per-row count must divide the pane's link count, or the last row's links stretch wide:
       Music 12 = 3 rows of 4, SimPlane 8 = 2 rows of 4 (T354). Pinned by tests/test_help.js. */
    @media (min-width: 900px) {
      .music-pane .quick-nav-links li {
        flex: 1 1 calc(25% - 0.35rem);
      }
      .football-pane .quick-nav-links li {
        flex: 1 1 calc(25% - 0.35rem);
      }
      .liambot-pane .quick-nav-links li {
        flex: 1 1 calc(25% - 0.35rem);
      }
      .caseycase-pane .quick-nav-links li {
        flex: 1 1 calc(20% - 0.35rem);
      }
      .simplane-pane .quick-nav-links li {
        flex: 1 1 calc(25% - 0.35rem);
      }
    }

    .quick-nav-links a {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.4rem;
      padding: 0.45rem 0.5rem;
      width: 100%;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 0;
      color: var(--text-secondary);
      font-family: var(--font-heading);
      font-size: 0.76rem;
      font-weight: 600;
      letter-spacing: 0.02em;
      text-decoration: none;
      white-space: nowrap;
      transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
      box-sizing: border-box;
    }

    .quick-nav-links a svg {
      width: 13px;
      height: 13px;
      flex-shrink: 0;
      display: block;
      opacity: 0.9;
      transition: transform 0.18s ease, opacity 0.18s ease;
    }

    .quick-nav-links a:hover svg {
      opacity: 1;
      transform: scale(1.1);
    }

    /* Music Pane Jump Links - Tinted with Music Blue */
    .music-pane .quick-nav-links a {
      color: #e0f7fa;
      background: rgba(0, 240, 255, 0.04);
      border-color: rgba(0, 240, 255, 0.14);
    }
    .music-pane .quick-nav-links a svg {
      color: #00f0ff;
    }
    .music-pane .quick-nav-links a.active {
      background: rgba(0, 240, 255, 0.22) !important;
      border-color: var(--music-blue) !important;
      color: #ffffff !important;
      box-shadow: 0 0 16px var(--music-glow) !important;
      transform: translateY(-1px);
    }
    .music-pane .quick-nav-links a.active svg {
      opacity: 1 !important;
      transform: scale(1.15) !important;
    }

    /* Football Pane Jump Links - Tinted with Pitch Green */
    .football-pane .quick-nav-links a {
      color: #e2fbe8;
      background: rgba(34, 197, 94, 0.04);
      border-color: rgba(34, 197, 94, 0.14);
    }
    .football-pane .quick-nav-links a svg {
      color: #34d399;
    }
    .football-pane .quick-nav-links a.active {
      background: rgba(34, 197, 94, 0.22) !important;
      border-color: var(--pitch-green) !important;
      color: #ffffff !important;
      box-shadow: 0 0 16px var(--pitch-green-glow) !important;
      transform: translateY(-1px);
    }
    .football-pane .quick-nav-links a.active svg {
      opacity: 1 !important;
      transform: scale(1.15) !important;
    }

    /* LiamBot Pane Jump Links - Tinted with LiamBot Purple */
    .liambot-pane .quick-nav-links a {
      color: #ede9fe;
      background: rgba(165, 180, 252, 0.04);
      border-color: rgba(165, 180, 252, 0.14);
    }
    .liambot-pane .quick-nav-links a svg {
      color: #a5b4fc;
    }
    .liambot-pane .quick-nav-links a.active {
      background: rgba(165, 180, 252, 0.22) !important;
      border-color: var(--liambot-violet) !important;
      color: #ffffff !important;
      box-shadow: 0 0 16px var(--liambot-glow) !important;
      transform: translateY(-1px);
    }
    .liambot-pane .quick-nav-links a.active svg {
      opacity: 1 !important;
      transform: scale(1.15) !important;
    }

    /* CaseyCase Pane Jump Links - Tinted with CaseyCase Blue */
    .caseycase-pane .quick-nav-links a {
      font-family: var(--font-caseycase);
      font-size: 0.72rem;
      letter-spacing: 0.03em;
      color: #e6f5f9;
      background: rgba(79, 162, 184, 0.04);
      border-color: rgba(79, 162, 184, 0.14);
    }
    .caseycase-pane .quick-nav-links a svg {
      color: #4fa2b8;
    }
    .caseycase-pane .quick-nav-links a.active {
      background: rgba(79, 162, 184, 0.22) !important;
      border-color: var(--caseycase-cyan) !important;
      color: #ffffff !important;
      box-shadow: 0 0 16px var(--caseycase-glow) !important;
      transform: translateY(-1px);
    }
    .caseycase-pane .quick-nav-links a.active svg {
      opacity: 1 !important;
      transform: scale(1.15) !important;
    }

    /* SimPlane Pane Jump Links - Tinted with Aviation Cyan */
    .simplane-pane .quick-nav-links a {
      font-family: var(--font-simplane-mono);
      font-size: 0.74rem;
      letter-spacing: 0.04em;
      color: #e0f2fe;
      background: rgba(0, 210, 255, 0.04);
      border-color: rgba(0, 210, 255, 0.14);
    }
    .simplane-pane .quick-nav-links a svg {
      color: #00d2ff;
    }
    .simplane-pane .quick-nav-links a.active {
      background: rgba(0, 210, 255, 0.22) !important;
      border-color: #00d2ff !important;
      color: #ffffff !important;
      box-shadow: 0 0 16px rgba(0, 210, 255, 0.4) !important;
      transform: translateY(-1px);
    }
    .simplane-pane .quick-nav-links a.active svg {
      opacity: 1 !important;
      transform: scale(1.15) !important;
    }

    /* Mouse Pointer Desktop Hover States Only (Prevents sticky touch hover on mobile) */
    @media (hover: hover) and (pointer: fine) {
      .music-pane .quick-nav-links a:hover:not(.active) {
        background: rgba(0, 240, 255, 0.12);
        border-color: rgba(0, 240, 255, 0.4);
        color: #ffffff;
      }
      .football-pane .quick-nav-links a:hover:not(.active) {
        background: rgba(34, 197, 94, 0.12);
        border-color: rgba(34, 197, 94, 0.4);
        color: #ffffff;
      }
      .liambot-pane .quick-nav-links a:hover:not(.active) {
        background: rgba(165, 180, 252, 0.12);
        border-color: rgba(165, 180, 252, 0.4);
        color: #ffffff;
      }
      .caseycase-pane .quick-nav-links a:hover:not(.active) {
        background: rgba(79, 162, 184, 0.12);
        border-color: rgba(79, 162, 184, 0.4);
        color: #ffffff;
      }
      .simplane-pane .quick-nav-links a:hover:not(.active) {
        background: rgba(0, 210, 255, 0.12);
        border-color: rgba(0, 210, 255, 0.4);
        color: #ffffff;
      }
    }

    /* Section Cards & Dynamic Sticky Offset */
    section.doc-section,
    section.guide-section,
    .changelog-section,
    .changelog-details,
    section[id] {
      scroll-margin-top: var(--help-scroll-offset, 140px);
    }

    section.doc-section {
      background: var(--panel-bg);
      border: 1px solid var(--panel-border);
      border-radius: 0;
      padding: 2.25rem 2rem;
      margin-bottom: 1.25rem;
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }

    /* Offscreen Layout & Rendering Optimization (Skip layout calculations for offscreen sections) */
    .doc-section:not(:first-of-type),
    .guide-section:not(:first-of-type) {
      content-visibility: auto;
      contain-intrinsic-size: auto none auto 500px;
    }

    /*
      Applied while a quick-nav jump is in flight. The 500px estimate above is far smaller
      than real sections (1500-2500px), so scrolling toward a target renders the sections it
      passes and grows the document underneath the animation — the link then lands thousands
      of pixels short. Forcing layout for one frame lets every section report its true height
      before the scroll target is computed.

      Removing the class afterwards does not re-introduce the shift: `contain-intrinsic-size`
      is declared with the `auto` keyword, so once a section has been rendered the browser
      remembers its real size and uses that instead of the 500px fallback.
    */
    .help-jump-measuring .doc-section,
    .help-jump-measuring .guide-section {
      content-visibility: visible !important;
    }

    .section-header {
      display: flex;
      align-items: flex-start;
      gap: 0.85rem;
      margin-bottom: 1.5rem;
      padding-bottom: 1rem;
      border-bottom: 1px solid var(--panel-border-subtle);
    }

    .section-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      border-radius: 0;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--panel-border);
      color: var(--music-blue);
      flex-shrink: 0;
      margin-top: -1px;
    }

    .section-icon svg {
      width: 18px;
      height: 18px;
      display: block;
    }

    .football-pane .section-icon {
      color: var(--pitch-green);
      width: 28px;
      height: 28px;
      margin-top: calc((1.5 * clamp(0.85rem, 1.8vw, 1.05rem) - 28px) / 2 - 1.5px);
    }

    .football-pane .section-icon svg {
      width: 16px;
      height: 16px;
    }

    .caseycase-pane .section-icon {
      color: var(--caseycase-cyan);
    }

    .liambot-pane .section-icon {
      color: var(--liambot-violet);
    }

    .section-title {
      font-family: var(--font-heading);
      font-size: 1.35rem;
      font-weight: 700;
      letter-spacing: 0.03em;
      color: var(--music-blue);
      line-height: 1.25;
      margin: 0;
    }

    /* Music Player Headings & Titles (80s Retro Font: VT323) */
    .music-pane .section-title,
    .music-pane h1,
    .music-pane h2,
    .music-pane h3,
    .music-pane h4,
    .music-pane .feature-card-title,
    .music-pane .artist-card-title,
    .music-pane th,
    .music-pane .changelog-summary,
    .music-pane .older-releases-summary,
    #pane-music .section-title,
    #pane-music h1,
    #pane-music h2,
    #pane-music h3,
    #pane-music h4,
    #pane-music .feature-card-title,
    #pane-music .artist-card-title,
    #pane-music th,
    #pane-music .changelog-summary,
    #pane-music .older-releases-summary {
      font-family: var(--font-retro);
      font-weight: 400;
      letter-spacing: 0.05em;
    }

    .music-pane .hero h1,
    #pane-music .hero h1 {
      font-size: clamp(2.2rem, 4.5vw, 2.9rem);
      letter-spacing: 0.06em;
      color: var(--music-blue);
      text-shadow: 0 0 12px var(--music-glow);
    }

    .music-pane .section-title,
    .music-pane h2,
    #pane-music .section-title,
    #pane-music h2 {
      font-size: 1.85rem;
      line-height: 1.15;
      letter-spacing: 0.05em;
      color: var(--music-blue);
      text-shadow: 0 0 6px rgba(56, 189, 248, 0.2);
    }

    .music-pane .section-icon,
    #pane-music .section-icon {
      margin-top: 2px;
      color: var(--music-blue);
    }

    .music-pane h3,
    #pane-music h3 {
      font-size: 1.45rem;
      letter-spacing: 0.04em;
      color: #7dd3fc;
      text-shadow: none;
    }

    .music-pane h4,
    #pane-music h4 {
      font-size: 1.25rem;
      letter-spacing: 0.04em;
      color: var(--accent-green);
    }

    .music-pane .feature-card-title,
    #pane-music .feature-card-title {
      font-size: 1.25rem;
      letter-spacing: 0.04em;
      color: #ffffff;
    }

    .music-pane .artist-card-title,
    #pane-music .artist-card-title {
      font-size: 1.35rem;
      letter-spacing: 0.05em;
    }

    .music-pane .older-releases-summary,
    #pane-music .older-releases-summary {
      font-size: 1.25rem;
      letter-spacing: 0.05em;
    }

    .music-pane th,
    #pane-music th {
      font-size: 1.15rem;
      letter-spacing: 0.05em;
      color: #7dd3fc;
      text-transform: uppercase;
    }

    /* Football Headings & Titles (Retro 8-Bit Arcade Font: Press Start 2P) */
    .football-pane .section-title,
    .football-pane h1,
    .football-pane h2,
    .football-pane h3,
    .football-pane h4,
    .football-pane .feature-card-title,
    .football-pane th,
    .football-pane .changelog-summary {
      font-family: var(--font-arcade);
      font-weight: 400;
    }

    .football-pane .section-title,
    .football-pane h2 {
      font-size: clamp(0.85rem, 1.8vw, 1.05rem);
      line-height: 1.5;
      letter-spacing: 0.05em;
      color: var(--pitch-green);
    }

    .caseycase-pane .section-title,
    .caseycase-pane h1,
    .caseycase-pane h2,
    .caseycase-pane h3,
    .caseycase-pane h4,
    .caseycase-pane .feature-card-title,
    .caseycase-pane th,
    .caseycase-pane .changelog-summary,
    .caseycase-pane .changelog-summary span {
      font-family: var(--font-caseycase);
      color: var(--caseycase-cyan);
    }

    .caseycase-pane .section-title,
    .caseycase-pane h2 {
      text-shadow: 0 0 12px var(--caseycase-glow);
    }

    .liambot-pane .section-title,
    .liambot-pane h1,
    .liambot-pane h2,
    .liambot-pane h3,
    .liambot-pane h4,
    .liambot-pane .feature-card-title,
    .liambot-pane th,
    .liambot-pane .changelog-summary span {
      font-family: var(--font-heading);
      color: var(--liambot-violet);
    }

    .liambot-pane .section-title,
    .liambot-pane h2 {
      text-shadow: 0 0 12px var(--liambot-glow);
    }

    h3 {
      font-family: var(--font-heading);
      font-size: 1.05rem;
      font-weight: 600;
      letter-spacing: 0.02em;
      color: var(--music-blue);
      margin: 1.5rem 0 0.6rem 0;
    }

    .football-pane h3 {
      font-size: clamp(0.72rem, 1.4vw, 0.85rem);
      line-height: 1.55;
      letter-spacing: 0.04em;
      color: var(--pitch-green);
      margin: 1.5rem 0 0.6rem 0;
    }

    .football-pane h4 {
      font-size: 0.72rem;
      line-height: 1.45;
      letter-spacing: 0.03em;
      color: var(--pitch-green);
    }

    .football-pane .feature-card-title {
      font-size: 0.72rem;
      line-height: 1.45;
      letter-spacing: 0.03em;
      color: #ffffff;
    }

    .football-pane th {
      font-size: 0.68rem;
      line-height: 1.4;
      letter-spacing: 0.03em;
      color: var(--pitch-green);
    }

    .football-pane .changelog-summary {
      font-size: 0.75rem;
      line-height: 1.4;
      letter-spacing: 0.04em;
    }

    p {
      color: var(--text-secondary);
      margin-bottom: 1rem;
      font-size: 0.95rem;
    }

    /* Feature Grid Cards */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
      gap: 1.25rem;
      margin: 1.25rem 0;
      width: 100%;
      max-width: 100%;
    }

    .feature-card {
      background: var(--bg-surface);
      border: 1px solid var(--panel-border);
      border-radius: 0;
      padding: 1.25rem;
      transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
      text-decoration: none;
      color: inherit;
      display: block;
      width: 100%;
      max-width: 100%;
      min-width: 0;
      overflow: hidden;
    }

    .feature-card:hover {
      border-color: rgba(51, 255, 51, 0.4);
      box-shadow: 0 4px 18px rgba(0, 0, 0, 0.3);
      transform: translateY(-2px);
      text-decoration: none;
    }

    .music-pane .feature-card:hover,
    #pane-music .feature-card:hover {
      border-color: rgba(19, 248, 241, 0.5);
      box-shadow: 0 4px 18px rgba(19, 248, 241, 0.15);
    }

    a.feature-card {
      cursor: pointer;
    }

    a.feature-card:hover .feature-card-title {
      color: var(--active-accent, var(--accent-cyan));
    }

    a.feature-card:focus-visible {
      outline: 2px solid var(--active-accent, var(--accent-cyan));
      outline-offset: 2px;
    }

    .football-pane .feature-card:hover {
      border-color: rgba(51, 255, 51, 0.4);
    }

    .feature-card-header {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 0.75rem;
      margin-bottom: 0.6rem;
    }

    .feature-card-title {
      order: 1;
      flex: 1;
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 0.95rem;
      line-height: 1.35;
      letter-spacing: 0.02em;
      color: #ffffff;
    }

    .feature-card-header .badge-tag {
      order: 2;
      white-space: nowrap;
      flex-shrink: 0;
    }

    .feature-card p {
      font-size: 0.88rem;
      color: var(--text-secondary);
      margin-bottom: 0;
      line-height: 1.5;
    }

    /* Key Chips / Keyboard Shortcuts */
    kbd {
      display: inline-block;
      padding: 0.2rem 0.5rem;
      font-family: var(--font-mono);
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--music-blue);
      background: #0d0f12;
      border: 1px solid rgba(0, 240, 255, 0.35);
      border-bottom: 2px solid rgba(0, 240, 255, 0.6);
      border-radius: 0;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
      margin: 0 0.15rem;
      white-space: nowrap;
      text-transform: uppercase;
    }

    .football-pane kbd {
      color: var(--pitch-green);
      border-color: rgba(51, 255, 51, 0.35);
      border-bottom-color: rgba(51, 255, 51, 0.6);
    }

    /* Inline Code Formatting */
    code {
      font-family: var(--font-mono);
      font-size: 0.84em;
      color: #e2e8f0;
      background: rgba(255, 255, 255, 0.07);
      padding: 0.12rem 0.38rem;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 0;
    }

    /* UI Button Sample Badges */
    .btn-ui-sample {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 22px;
      height: 22px;
      padding: 0 4px;
      border-radius: 0;
      border: 1px solid rgba(255, 255, 255, 0.4);
      border-bottom: 2px solid rgba(255, 255, 255, 0.6);
      background: #0d0f12;
      color: var(--accent-green);
      font-size: 0.95rem;
      font-weight: 700;
      line-height: 1;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
      margin: 0 0.2rem;
      vertical-align: middle;
      user-select: none;
      font-family: var(--font-mono);
    }
    .btn-ui-sample.btn-info-sample {
      color: var(--music-blue);
      border-color: rgba(0, 240, 255, 0.35);
      border-bottom-color: rgba(0, 240, 255, 0.6);
      font-size: 0.85rem;
    }
    .btn-ui-sample.btn-continuous-sample {
      color: var(--accent-green);
      border-color: rgba(0, 255, 204, 0.35);
      border-bottom-color: rgba(0, 255, 204, 0.6);
      font-size: 1.05rem;
      text-shadow: 0 0 6px rgba(0, 255, 204, 0.5);
    }

    /* Tables */
    .table-container,
    .table-responsive {
      width: 100%;
      overflow-x: auto;
      margin: 1.25rem 0;
      border-radius: 0;
      border: 1px solid var(--panel-border);
      background: var(--bg-surface);
      -webkit-overflow-scrolling: touch;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.88rem;
    }

    th {
      background: rgba(0, 0, 0, 0.4);
      color: var(--music-blue);
      font-family: var(--font-heading);
      font-weight: 600;
      font-size: 0.84rem;
      letter-spacing: 0.04em;
      padding: 0.85rem 1rem;
      border-bottom: 1px solid var(--panel-border);
      white-space: nowrap;
    }

    td {
      padding: 0.85rem 1rem;
      border-bottom: 1px solid var(--panel-border-subtle);
      color: var(--text-secondary);
      vertical-align: middle;
    }

    tr:last-child td {
      border-bottom: none;
    }

    tr:hover td {
      background: rgba(255, 255, 255, 0.02);
      color: var(--text-primary);
    }

    .badge-tag {
      display: inline-flex;
      align-items: center;
      padding: 0.15rem 0.5rem;
      border-radius: 0;
      font-family: var(--font-mono);
      font-size: 0.72rem;
      font-weight: 600;
      background: rgba(255, 255, 255, 0.06);
      color: var(--text-primary);
      border: 1px solid var(--panel-border);
      white-space: nowrap;
      flex-shrink: 0;
    }

    .badge-tag.cyan {
      background: rgba(56, 189, 248, 0.08);
      border-color: rgba(56, 189, 248, 0.25);
      color: var(--accent-cyan);
    }

    .badge-tag.green {
      background: rgba(52, 211, 153, 0.08);
      border-color: rgba(52, 211, 153, 0.25);
      color: var(--accent-green);
    }

    .badge-tag.pitch-green {
      background: rgba(52, 211, 153, 0.08);
      border-color: rgba(52, 211, 153, 0.25);
      color: var(--pitch-green);
    }

    .badge-tag.amber {
      background: rgba(245, 158, 11, 0.08);
      border-color: rgba(245, 158, 11, 0.25);
      color: var(--accent-amber);
    }

    .badge-tag.pink {
      background: rgba(244, 114, 182, 0.08);
      border-color: rgba(244, 114, 182, 0.25);
      color: var(--accent-pink);
    }

    .badge-tag.violet,
    .badge-tag.purple {
      background: rgba(167, 139, 250, 0.08);
      border-color: rgba(167, 139, 250, 0.25);
      color: var(--accent-violet);
    }

    .badge-tag.blue {
      background: rgba(96, 165, 250, 0.08);
      border-color: rgba(96, 165, 250, 0.25);
      color: #93c5fd;
    }

    .badge-tag.red,
    .badge-tag.hotfix,
    .badge-tag.crimson {
      background: rgba(248, 113, 113, 0.12);
      border-color: rgba(248, 113, 113, 0.35);
      color: #fca5a5;
      box-shadow: 0 0 6px rgba(248, 113, 113, 0.15);
    }

    .callout {
      display: flex;
      align-items: flex-start;
      gap: 0.85rem;
      padding: 1.1rem 1.25rem;
      border-radius: 0;
      margin: 1.25rem 0;
      font-size: 0.9rem;
      line-height: 1.5;
    }

    .callout-icon {
      flex-shrink: 0;
      width: 20px;
      height: 1.5em;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: 0;
    }

    .callout-icon svg {
      width: 18px;
      height: 18px;
      display: block;
    }

    .callout.tip {
      background: rgba(0, 240, 255, 0.08);
      border: 1px solid rgba(0, 240, 255, 0.3);
      color: #e0f2fe;
    }

    .callout.tip .callout-icon {
      color: var(--music-blue);
    }

    .callout.pitch-green {
      background: rgba(51, 255, 51, 0.08);
      border: 1px solid rgba(51, 255, 51, 0.3);
      color: #e5ffe5;
    }

    .callout.pitch-green .callout-icon {
      color: var(--pitch-green);
    }

    .callout.pink {
      background: rgba(255, 51, 136, 0.08);
      border: 1px solid rgba(255, 51, 136, 0.3);
      color: #ffe5f0;
    }

    .callout.pink .callout-icon {
      color: var(--accent-pink);
    }

    .callout.info {
      background: rgba(79, 162, 184, 0.08);
      border: 1px solid rgba(79, 162, 184, 0.3);
      color: #e0f7ff;
    }

    .callout.info .callout-icon {
      color: var(--accent-cyan);
    }

    .callout.warning,
    .callout.amber {
      background: rgba(229, 192, 123, 0.08);
      border: 1px solid rgba(229, 192, 123, 0.25);
      color: #fff4e0;
    }

    .callout.warning .callout-icon,
    .callout.amber .callout-icon {
      color: var(--accent-amber);
    }

    /* Guide, Documentation & Changelog Feature List Lead Term Typography (Solar Gold / Amber Accent) */
    .doc-section ul:not(.app-nav-list):not(.quick-nav-links) li > strong:first-child,
    .guide-section ul:not(.app-nav-list):not(.quick-nav-links) li > strong:first-child,
    .feature-bullets li > strong:first-child,
    .release-list li strong,
    .patch-list li strong {
      color: var(--accent-amber);
    }

    /* Artist Logo Roster */
    .artist-roster {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
      gap: 1rem;
      margin: 1.25rem 0;
      width: 100%;
      max-width: 100%;
    }

    .artist-card {
      background: var(--bg-surface);
      border: 1px solid var(--panel-border);
      border-radius: 0;
      padding: 1rem;
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      width: 100%;
      max-width: 100%;
      min-width: 0;
      overflow: hidden;
    }

    .artist-card-header {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 0.65rem;
    }

    .artist-logo-thumb {
      order: 2;
      width: 28px;
      height: 28px;
      object-fit: contain;
      border-radius: 0;
      background: rgba(0, 0, 0, 0.4);
      flex-shrink: 0;
    }

    .artist-card-title {
      order: 1;
      flex: 1;
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 0.9rem;
      line-height: 1.35;
      letter-spacing: 0.02em;
      color: #ffffff;
    }

    .artist-card-desc {
      font-size: 0.82rem;
      color: var(--text-secondary);
      line-height: 1.4;
    }

    /* Footer */
    .app-footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1rem 0.5rem 2rem 0.5rem;
      margin-top: 1.25rem;
      border-top: none;
      font-family: var(--font-body);
      font-size: 0.8rem;
      color: var(--text-secondary);
      width: 100%;
    }

    .footer-left {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .footer-right {
      display: flex;
      align-items: center;
      gap: 0.85rem;
    }

    .app-footer a {
      color: var(--text-secondary);
      text-decoration: none;
      transition: color 0.2s ease;
    }

    .app-footer a:hover {
      color: var(--active-accent);
    }

    /* Responsive */
    @media (max-width: 768px) {
      section.doc-section,
      section.guide-section,
      .changelog-section,
      .changelog-details,
      section[id] {
        scroll-margin-top: var(--help-scroll-offset, 56px);
      }

      .container {
        padding: 0 0.75rem;
      }
      section.doc-section {
        padding: 1.5rem 1.25rem;
      }

      /* Primary Tab Switcher on Mobile: Sticky with smooth slide up/down transition */
      .tab-switcher-container {
        position: sticky !important;
        top: 0 !important;
        z-index: 100;
        margin: 0.5rem 0 1rem 0;
        width: 100%;
        transform: translateY(0);
        transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
      }

      /* When scrolling DOWN on mobile, hide primary nav off-screen */
      body.mobile-nav-hidden .tab-switcher-container {
        transform: translateY(-120%);
        pointer-events: none;
      }

      /* Single-Row Horizontal Swipeable Chips for Quick Nav */
      .quick-nav {
        position: sticky !important;
        top: var(--mobile-primary-nav-height, 52px) !important;
        z-index: 90;
        padding: 0.55rem 0.5rem;
        padding-top: max(0.55rem, env(safe-area-inset-top, 0px));
        margin-bottom: 1.25rem;
        overflow-x: auto !important;
        overflow-y: hidden !important;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
        transition: top 0.28s cubic-bezier(0.16, 1, 0.3, 1);
      }

      /* When primary nav is hidden (scrolling down), secondary nav pins at top: 0 */
      body.mobile-nav-hidden .quick-nav {
        top: 0 !important;
      }
      .quick-nav::-webkit-scrollbar {
        display: none;
        width: 0;
        height: 0;
      }

      .quick-nav-links {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        align-items: center !important;
        justify-content: flex-start !important;
        overflow: visible !important;
        gap: 0.35rem !important;
        padding: 0.15rem 0.25rem !important;
        margin: 0 !important;
        width: max-content !important;
        min-width: 100% !important;
        list-style: none !important;
      }

      .quick-nav-links li {
        display: inline-flex !important;
        flex: 0 0 auto !important;
        width: auto !important;
        max-width: none !important;
        min-width: 0 !important;
        margin: 0 !important;
        padding: 0 !important;
      }

      .quick-nav-links a {
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 0.35rem !important;
        padding: 0.4rem 0.7rem !important;
        width: auto !important;
        min-width: max-content !important;
        font-size: 0.75rem !important;
        border-radius: 4px !important;
        white-space: nowrap !important;
        flex-shrink: 0 !important;
        box-sizing: border-box !important;
      }

      .quick-nav-links a svg {
        width: 13px !important;
        height: 13px !important;
        flex-shrink: 0 !important;
        display: inline-block !important;
      }
      table {
        font-size: 0.82rem;
      }
      th, td {
        padding: 0.65rem 0.75rem;
      }

      /* Fluid Table & Card Containers: Prevent Horizontal Viewport Overflow */
      .table-container,
      .table-responsive {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        overflow-x: hidden !important;
      }

      .table-container > table {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
      }

      .feature-grid,
      .artist-roster {
        grid-template-columns: 1fr !important;
        gap: 0.85rem !important;
        width: 100% !important;
        max-width: 100% !important;
      }

      /* Master Keyboard Shortcuts & Section Reference Tables: Responsive Mobile Card List Layout */
      #shortcuts .table-container,
      .shortcuts-table-container,
      #architecture .table-container,
      #remix .table-container,
      #parameters .table-container,
      #football-guide .table-container,
      #football-controls .table-container,
      #football-ai .table-container {
        border: none !important;
        background: transparent !important;
        overflow: visible !important;
        margin: 0.85rem 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
      }

      #shortcuts thead,
      .lod-table thead,
      .dsp-table thead,
      .triggers-table thead,
      .params-table thead,
      .football-difficulty-table thead,
      .football-controls-table thead,
      .football-ai-table thead {
        display: none;
      }

      #shortcuts table,
      #shortcuts tbody,
      .lod-table,
      .lod-table tbody,
      .dsp-table,
      .dsp-table tbody,
      .triggers-table,
      .triggers-table tbody,
      .params-table,
      .params-table tbody,
      .football-difficulty-table,
      .football-difficulty-table tbody,
      .football-controls-table,
      .football-controls-table tbody,
      .football-ai-table,
      .football-ai-table tbody {
        display: flex;
        flex-direction: column;
        gap: 0.55rem;
        width: 100%;
        min-width: 0 !important;
      }

      #shortcuts tr {
        display: grid;
        grid-template-columns: minmax(0, auto) 1fr auto;
        grid-template-areas:
          "key action category"
          "desc desc desc";
        align-items: center;
        gap: 0.35rem 0.6rem;
        padding: 0.7rem 0.85rem;
        background: var(--bg-surface-elevated);
        border: 1px solid var(--panel-border);
        border-left: 3px solid rgba(0, 240, 255, 0.45);
        border-radius: 0;
        box-shadow: 0 3px 12px rgba(0, 0, 0, 0.25);
        transition: border-color 0.15s, box-shadow 0.15s;
        box-sizing: border-box;
      }

      #shortcuts tr:hover {
        background: var(--bg-surface-elevated);
        border-color: var(--panel-border-hover);
        border-left-color: var(--accent-cyan);
      }

      #shortcuts td {
        display: block;
        padding: 0;
        border: none;
        color: var(--text-secondary);
      }

      #shortcuts td:nth-child(1) {
        grid-area: key;
        white-space: nowrap;
      }

      #shortcuts td:nth-child(1) kbd {
        margin: 0 0.1rem;
      }

      #shortcuts td:nth-child(2) {
        grid-area: action;
        font-size: 0.88rem;
        color: #ffffff;
        line-height: 1.3;
      }

      #shortcuts td:nth-child(2) strong {
        color: #ffffff;
      }

      #shortcuts td:nth-child(3) {
        grid-area: category;
        justify-self: end;
      }

      #shortcuts td:nth-child(4) {
        grid-area: desc;
        font-size: 0.82rem;
        line-height: 1.45;
        color: var(--text-secondary);
        padding-top: 0.35rem;
        border-top: 1px solid var(--panel-border-subtle);
        margin-top: 0.1rem;
      }

      /* DSP Rack Table: Responsive Mobile Card List Layout */
      .dsp-table tr {
        display: grid;
        grid-template-columns: auto minmax(0, 1fr) auto;
        grid-template-areas:
          "button name type"
          "desc desc desc";
        align-items: center;
        gap: 0.35rem 0.6rem;
        padding: 0.7rem 0.85rem;
        background: var(--bg-surface-elevated);
        border: 1px solid var(--panel-border);
        border-left: 3px solid rgba(255, 170, 0, 0.45);
        border-radius: 0;
        box-shadow: 0 3px 12px rgba(0, 0, 0, 0.25);
        transition: border-color 0.15s, box-shadow 0.15s;
        box-sizing: border-box;
      }

      .dsp-table tr:hover {
        background: var(--bg-surface-elevated);
        border-color: var(--panel-border-hover);
        border-left-color: var(--accent-amber);
      }

      .dsp-table td {
        display: block;
        padding: 0;
        border: none;
        color: var(--text-secondary);
      }

      .dsp-table td:nth-child(1) {
        grid-area: name;
        font-size: 0.92rem;
        color: #ffffff;
        line-height: 1.3;
      }

      .dsp-table td:nth-child(1) strong {
        color: #ffffff;
      }

      .dsp-table td:nth-child(2) {
        grid-area: button;
        text-align: left !important;
        white-space: nowrap;
      }

      .dsp-table td:nth-child(3) {
        grid-area: type;
        justify-self: end;
      }

      .dsp-table td:nth-child(4) {
        grid-area: desc;
        font-size: 0.82rem;
        line-height: 1.45;
        color: var(--text-secondary);
        padding-top: 0.35rem;
        border-top: 1px solid var(--panel-border-subtle);
        margin-top: 0.1rem;
      }

      /* Live Performance Triggers Table: Responsive Mobile Card List Layout */
      .triggers-table tr {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
          "pad hotkeys"
          "action action"
          "desc desc";
        align-items: center;
        gap: 0.35rem 0.6rem;
        padding: 0.7rem 0.85rem;
        background: var(--bg-surface-elevated);
        border: 1px solid var(--panel-border);
        border-left: 3px solid rgba(192, 132, 252, 0.45);
        border-radius: 0;
        box-shadow: 0 3px 12px rgba(0, 0, 0, 0.25);
        transition: border-color 0.15s, box-shadow 0.15s;
        box-sizing: border-box;
      }

      .triggers-table tr:hover {
        background: var(--bg-surface-elevated);
        border-color: var(--panel-border-hover);
        border-left-color: #c084fc;
      }

      .triggers-table td {
        display: block;
        padding: 0;
        border: none;
        color: var(--text-secondary);
      }

      .triggers-table td:nth-child(1) {
        grid-area: action;
        font-size: 0.88rem;
        color: #ffffff;
        line-height: 1.3;
      }

      .triggers-table td:nth-child(1) strong {
        color: #ffffff;
      }

      .triggers-table td:nth-child(2) {
        grid-area: pad;
        white-space: nowrap;
      }

      .triggers-table td:nth-child(3) {
        grid-area: hotkeys;
        justify-self: end;
        white-space: nowrap;
      }

      .triggers-table td:nth-child(3) kbd {
        margin: 0 0.1rem;
      }

      .triggers-table td:nth-child(4) {
        grid-area: desc;
        font-size: 0.82rem;
        line-height: 1.45;
        color: var(--text-secondary);
        padding-top: 0.35rem;
        border-top: 1px solid var(--panel-border-subtle);
        margin-top: 0.1rem;
      }

      /* Parameter Grid Table: Responsive Mobile Card List Layout */
      .params-table tr {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
          "name range"
          "desc desc";
        align-items: center;
        gap: 0.35rem 0.6rem;
        padding: 0.7rem 0.85rem;
        background: var(--bg-surface-elevated);
        border: 1px solid var(--panel-border);
        border-left: 3px solid rgba(0, 240, 255, 0.45);
        border-radius: 0;
        box-shadow: 0 3px 12px rgba(0, 0, 0, 0.25);
        transition: border-color 0.15s, box-shadow 0.15s;
        box-sizing: border-box;
      }

      .params-table tr:hover {
        background: var(--bg-surface-elevated);
        border-color: var(--panel-border-hover);
        border-left-color: var(--accent-cyan);
      }

      .params-table td {
        display: block;
        padding: 0;
        border: none;
        color: var(--text-secondary);
      }

      .params-table td:nth-child(1) {
        grid-area: name;
        font-size: 0.92rem;
        color: #ffffff;
        line-height: 1.3;
      }

      .params-table td:nth-child(1) strong {
        color: #ffffff;
      }

      .params-table td:nth-child(2) {
        grid-area: range;
        justify-self: end;
        font-family: var(--font-mono);
        font-size: 0.76rem;
        font-weight: 600;
        color: var(--accent-cyan);
        background: rgba(0, 240, 255, 0.08);
        border: 1px solid rgba(0, 240, 255, 0.25);
        padding: 0.15rem 0.45rem;
        white-space: nowrap;
      }

      .params-table td:nth-child(3) {
        grid-area: desc;
        font-size: 0.82rem;
        line-height: 1.45;
        color: var(--text-secondary);
        padding-top: 0.35rem;
        border-top: 1px solid var(--panel-border-subtle);
        margin-top: 0.1rem;
      }

      /* Adaptive Quality LOD Table: Responsive Mobile Card List Layout */
      .lod-table tr {
        display: grid;
        grid-template-columns: minmax(0, auto) 1fr;
        grid-template-areas:
          "tier target"
          "desc desc";
        align-items: center;
        gap: 0.35rem 0.6rem;
        padding: 0.7rem 0.85rem;
        background: var(--bg-surface-elevated);
        border: 1px solid var(--panel-border);
        border-left: 3px solid rgba(51, 255, 51, 0.45);
        border-radius: 0;
        box-shadow: 0 3px 12px rgba(0, 0, 0, 0.25);
        transition: border-color 0.15s, box-shadow 0.15s;
        box-sizing: border-box;
      }

      .lod-table tr:hover {
        background: var(--bg-surface-elevated);
        border-color: var(--panel-border-hover);
        border-left-color: var(--accent-green);
      }

      .lod-table td {
        display: block;
        padding: 0;
        border: none;
        color: var(--text-secondary);
      }

      .lod-table td:nth-child(1) {
        grid-area: tier;
        white-space: nowrap;
      }

      .lod-table td:nth-child(2) {
        grid-area: target;
        font-size: 0.84rem;
        color: #ffffff;
        justify-self: end;
        text-align: right;
      }

      .lod-table td:nth-child(3) {
        grid-area: desc;
        font-size: 0.82rem;
        line-height: 1.45;
        color: var(--text-secondary);
        padding-top: 0.35rem;
        border-top: 1px solid var(--panel-border-subtle);
        margin-top: 0.1rem;
      }

      /* Football Controls Table: Responsive Mobile Card List Layout */
      .football-controls-table tr {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
          "keys category"
          "touch touch"
          "desc desc";
        align-items: center;
        gap: 0.35rem 0.6rem;
        padding: 0.7rem 0.85rem;
        background: var(--bg-surface-elevated);
        border: 1px solid var(--panel-border);
        border-left: 3px solid rgba(51, 255, 51, 0.45);
        border-radius: 0;
        box-shadow: 0 3px 12px rgba(0, 0, 0, 0.25);
        transition: border-color 0.15s, box-shadow 0.15s;
        box-sizing: border-box;
      }

      .football-controls-table tr:hover {
        background: var(--bg-surface-elevated);
        border-color: var(--panel-border-hover);
        border-left-color: var(--pitch-green);
      }

      .football-controls-table td {
        display: block;
        padding: 0;
        border: none;
        color: var(--text-secondary);
      }

      .football-controls-table td:nth-child(1) {
        grid-area: keys;
      }

      .football-controls-table td:nth-child(1) kbd {
        margin: 0 0.1rem;
      }

      .football-controls-table td:nth-child(2) {
        grid-area: touch;
        font-size: 0.88rem;
        color: #ffffff;
        line-height: 1.3;
      }

      .football-controls-table td:nth-child(2) strong {
        color: #ffffff;
      }

      .football-controls-table td:nth-child(3) {
        grid-area: category;
        justify-self: end;
      }

      .football-controls-table td:nth-child(4) {
        grid-area: desc;
        font-size: 0.82rem;
        line-height: 1.45;
        color: var(--text-secondary);
        padding-top: 0.35rem;
        border-top: 1px solid var(--panel-border-subtle);
        margin-top: 0.1rem;
      }

      /* Football Difficulty & AI Tables: Responsive Mobile Card List Layout */
      .football-difficulty-table tr,
      .football-ai-table tr {
        display: grid;
        grid-template-columns: auto 1fr;
        grid-template-areas:
          "tag pace"
          "desc desc";
        align-items: center;
        gap: 0.35rem 0.6rem;
        padding: 0.7rem 0.85rem;
        background: var(--bg-surface-elevated);
        border: 1px solid var(--panel-border);
        border-left: 3px solid rgba(51, 255, 51, 0.45);
        border-radius: 0;
        box-shadow: 0 3px 12px rgba(0, 0, 0, 0.25);
        transition: border-color 0.15s, box-shadow 0.15s;
        box-sizing: border-box;
      }

      .football-difficulty-table tr:hover,
      .football-ai-table tr:hover {
        background: var(--bg-surface-elevated);
        border-color: var(--panel-border-hover);
        border-left-color: var(--pitch-green);
      }

      .football-difficulty-table td,
      .football-ai-table td {
        display: block;
        padding: 0;
        border: none;
        color: var(--text-secondary);
      }

      .football-difficulty-table td:nth-child(1),
      .football-ai-table td:nth-child(1) {
        grid-area: tag;
      }

      .football-difficulty-table td:nth-child(2),
      .football-ai-table td:nth-child(2) {
        grid-area: pace;
        font-size: 0.86rem;
        color: #ffffff;
        font-weight: 600;
        justify-self: end;
      }

      .football-difficulty-table td:nth-child(3),
      .football-ai-table td:nth-child(3) {
        grid-area: desc;
        font-size: 0.82rem;
        line-height: 1.45;
        color: var(--text-secondary);
        padding-top: 0.35rem;
        border-top: 1px solid var(--panel-border-subtle);
        margin-top: 0.1rem;
      }

      @media (max-width: 520px) {
        #shortcuts tr {
          grid-template-columns: minmax(0, 1fr) auto;
          grid-template-areas:
            "key category"
            "action action"
            "desc desc";
          gap: 0.28rem 0.45rem;
          padding: 0.6rem 0.75rem;
        }

        #shortcuts td:nth-child(1) {
          display: flex;
          align-items: center;
          flex-wrap: wrap;
          gap: 0.2rem;
        }

        #shortcuts td:nth-child(2) {
          font-size: 0.88rem;
          padding-top: 0.05rem;
        }

        #shortcuts td:nth-child(4) {
          padding-top: 0.25rem;
        }

        .lod-table tr {
          grid-template-columns: 1fr;
          grid-template-areas:
            "tier"
            "target"
            "desc";
          gap: 0.28rem 0;
        }

        .lod-table td:nth-child(2) {
          justify-self: start;
          text-align: left;
        }
      }

      /* Responsive Data Tables as Stacked Cards */
      .table-responsive {
        border: none;
        background: transparent;
        overflow: visible;
        margin: 1rem 0;
      }

      .data-table thead {
        display: none;
      }

      .data-table,
      .data-table tbody {
        display: flex;
        flex-direction: column;
        gap: 0.85rem;
        width: 100%;
        min-width: 0 !important;
      }

      .data-table tr {
        display: flex;
        flex-direction: column;
        background: var(--bg-surface-elevated);
        border: 1px solid var(--panel-border);
        padding: 1rem 1.15rem;
        border-radius: 0;
        gap: 0.5rem;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
        transition: border-color 0.2s, box-shadow 0.2s;
      }

      .data-table tr:hover {
        background: var(--bg-surface-elevated);
        border-color: var(--panel-border-hover);
      }

      .data-table td {
        display: block;
        padding: 0;
        border: none;
        font-size: 0.86rem;
        color: var(--text-secondary);
        line-height: 1.5;
      }

      /* LiamBot Table Card Styles */
      .liambot-table tr {
        border-left: 3px solid var(--liambot-violet);
      }

      .liambot-table td:nth-child(1) {
        font-family: var(--font-heading);
        font-size: 0.96rem;
        font-weight: 700;
        color: #ffffff;
        border-bottom: 1px solid var(--panel-border-subtle);
        padding-bottom: 0.4rem;
      }

      .liambot-table td:nth-child(1) strong {
        color: #ffffff;
      }

      .liambot-table td:nth-child(2) {
        color: var(--text-secondary);
        font-size: 0.84rem;
        padding-top: 0.15rem;
      }

      .liambot-table td:nth-child(2)::before {
        content: "Focus: ";
        font-weight: 700;
        color: var(--text-primary);
        font-family: var(--font-mono);
        font-size: 0.74rem;
        text-transform: uppercase;
        letter-spacing: 0.04em;
      }

      .liambot-table td:nth-child(3) {
        background: rgba(165, 180, 252, 0.08);
        border: 1px solid rgba(165, 180, 252, 0.25);
        padding: 0.65rem 0.85rem;
        margin-top: 0.35rem;
        color: #f3f4f6;
        font-size: 0.84rem;
      }

      .liambot-table td:nth-child(3)::before {
        content: "Example Exploration Prompt";
        font-style: normal;
        font-weight: 700;
        color: var(--liambot-violet);
        font-family: var(--font-heading);
        font-size: 0.72rem;
        letter-spacing: 0.04em;
        text-transform: uppercase;
        display: block;
        margin-bottom: 0.25rem;
      }

      .liambot-table td:nth-child(3) em {
        font-style: italic;
        color: #ffffff;
      }

      /* CaseyCase Table Card Styles */
      .caseycase-table tr {
        border-left: 3px solid var(--caseycase-cyan);
      }

      .caseycase-table td:nth-child(1) {
        padding-bottom: 0.1rem;
      }

      .caseycase-table td:nth-child(1) code {
        background: rgba(79, 162, 184, 0.12);
        border: 1px solid rgba(79, 162, 184, 0.35);
        color: var(--caseycase-cyan);
        font-weight: 700;
        font-size: 0.86rem;
        padding: 0.2rem 0.5rem;
      }

      .caseycase-table td:nth-child(2) {
        font-family: var(--font-caseycase);
        font-size: 0.96rem;
        font-weight: 700;
        color: #ffffff;
        border-bottom: 1px solid var(--panel-border-subtle);
        padding-bottom: 0.4rem;
      }

      .caseycase-table td:nth-child(3) {
        color: var(--text-secondary);
        font-size: 0.84rem;
        padding-top: 0.15rem;
      }

      .caseycase-table td:nth-child(3)::before {
        content: "Automation: ";
        font-weight: 700;
        color: var(--text-primary);
        font-family: var(--font-mono);
        font-size: 0.74rem;
        text-transform: uppercase;
        letter-spacing: 0.04em;
      }
    }

    @media (max-width: 640px) {
      header.site-header {
        margin-top: 0.75rem;
        padding: 0.85rem 1rem;
      }
      .tab-switcher,
      html[data-dev="true"] .tab-switcher,
      body[data-dev="true"] .tab-switcher,
      html[data-active-tab="simplane"] .tab-switcher,
      body[data-active-tab="simplane"] .tab-switcher {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        width: 100%;
        gap: 0.4rem;
        padding: 0.4rem;
      }
      .tab-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.65rem 0.5rem;
        font-size: 0.82rem;
        width: 100%;
        text-align: center;
        white-space: nowrap;
      }
      .tab-btn svg {
        width: 15px;
        height: 15px;
        flex-shrink: 0;
      }
    }

    @media (max-width: 380px) {
      .tab-btn {
        font-size: 0.75rem;
        padding: 0.55rem 0.3rem;
        gap: 0.35rem;
      }
      .tab-btn svg {
        width: 14px;
        height: 14px;
      }
    }

    /* Changelog Container & Older Releases Accordion */
    .changelog-content {
      padding: 0;
      border-top: none;
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
    }

    .older-releases-details {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--panel-border);
      border-radius: 0;
      overflow: hidden;
      margin-top: 0.75rem;
      transition: border-color 0.2s ease, background 0.2s ease;
    }

    .older-releases-details:hover {
      border-color: var(--panel-border-hover);
      background: rgba(255, 255, 255, 0.04);
    }

    .older-releases-details[open] {
      border-color: var(--panel-border-hover);
      background: rgba(0, 0, 0, 0.2);
    }

    .football-pane .older-releases-details[open] {
      border-color: rgba(51, 255, 51, 0.4);
    }
    .liambot-pane .older-releases-details[open] {
      border-color: rgba(165, 180, 252, 0.4);
    }
    .caseycase-pane .older-releases-details[open] {
      border-color: rgba(79, 162, 184, 0.4);
    }
    .music-pane .older-releases-details[open] {
      border-color: rgba(0, 240, 255, 0.4);
    }

    .older-releases-summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.95rem 1.25rem;
      background: var(--bg-surface-elevated);
      cursor: pointer;
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 0.9rem;
      letter-spacing: 0.03em;
      color: var(--text-secondary);
      user-select: none;
      list-style: none;
      transition: all 0.15s ease;
    }

    .older-releases-summary:hover {
      color: #ffffff;
      background: rgba(255, 255, 255, 0.06);
    }

    .older-releases-summary::-webkit-details-marker {
      display: none;
    }

    .older-releases-summary-left {
      display: flex;
      align-items: center;
      gap: 0.65rem;
    }

    .older-releases-summary-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-secondary);
    }

    .older-releases-details .changelog-chevron {
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      color: var(--text-muted);
    }

    .older-releases-details[open] .changelog-chevron {
      transform: rotate(90deg);
      color: #ffffff;
    }

    .music-pane .older-releases-details[open] .changelog-chevron {
      color: var(--music-blue);
    }
    .football-pane .older-releases-details[open] .changelog-chevron {
      color: var(--pitch-green);
    }
    .liambot-pane .older-releases-details[open] .changelog-chevron {
      color: var(--liambot-violet);
    }
    .caseycase-pane .older-releases-details[open] .changelog-chevron {
      color: var(--caseycase-cyan);
    }

    .older-releases-content {
      padding: 1.25rem 1rem;
      border-top: 1px solid var(--panel-border-subtle);
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
    }

    .patch-group-details {
      background: rgba(0, 0, 0, 0.18);
      border: 1px dashed var(--panel-border);
      border-radius: 0;
      margin-top: 0.5rem;
      margin-bottom: 0.5rem;
      transition: border-color 0.2s ease, background 0.2s ease;
    }

    .patch-group-details:hover {
      border-color: var(--panel-border-hover);
      background: rgba(0, 0, 0, 0.25);
    }

    .patch-group-details[open] {
      border-style: solid;
      border-color: var(--panel-border);
      background: rgba(0, 0, 0, 0.35);
    }

    .patch-group-summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.65rem 1rem;
      cursor: pointer;
      font-family: var(--font-mono);
      font-size: 0.82rem;
      color: var(--text-secondary);
      user-select: none;
      list-style: none;
      transition: color 0.15s ease, background 0.15s ease;
    }

    .patch-group-summary:hover {
      color: var(--text-primary);
      background: rgba(255, 255, 255, 0.02);
    }

    .patch-group-summary::-webkit-details-marker {
      display: none;
    }

    .patch-summary-left {
      display: flex;
      align-items: center;
      gap: 0.65rem;
    }

    .patch-count-badge {
      font-size: 0.68rem;
      font-weight: 700;
      padding: 0.15rem 0.45rem;
      border-radius: 0;
      background: rgba(255, 255, 255, 0.08);
      color: var(--text-secondary);
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }

    .patch-group-details[open] .patch-count-badge {
      background: var(--panel-border);
      color: var(--text-secondary);
    }

    .patch-chevron {
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      color: var(--text-muted);
    }

    .patch-group-details[open] .patch-chevron {
      transform: rotate(90deg);
      color: var(--accent-green);
    }

    .patch-group-content {
      padding: 0.85rem;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
      border-top: 1px solid var(--panel-border-subtle);
    }

    /* Easter Egg Collapsible Spoiler Accordion */
    .easter-egg-details {
      background: rgba(0, 0, 0, 0.22);
      border: 1px dashed rgba(255, 51, 136, 0.4);
      margin-top: 1rem;
      transition: border-color 0.2s ease, background 0.2s ease;
    }

    .easter-egg-details:hover {
      border-color: var(--accent-pink);
      background: rgba(255, 51, 136, 0.04);
    }

    .easter-egg-details[open] {
      border-style: solid;
      border-color: rgba(255, 51, 136, 0.6);
      background: rgba(0, 0, 0, 0.35);
    }

    .easter-egg-summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.75rem 1.1rem;
      cursor: pointer;
      font-family: var(--font-mono);
      font-size: 0.85rem;
      color: var(--text-secondary);
      user-select: none;
      list-style: none;
      transition: color 0.15s ease, background 0.15s ease;
    }

    .easter-egg-summary:hover {
      color: var(--text-primary);
    }

    .easter-egg-summary::-webkit-details-marker {
      display: none;
    }

    .easter-egg-summary-left {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .easter-egg-details[open] .patch-chevron {
      transform: rotate(90deg);
      color: var(--accent-pink);
    }

    .easter-egg-content {
      padding: 0.85rem;
      border-top: 1px solid rgba(255, 51, 136, 0.2);
    }

    /* Documentation Table & Data Accordion Details */
    .doc-accordion-details {
      background: rgba(0, 0, 0, 0.22);
      border: 1px solid var(--panel-border-subtle);
      border-radius: 0;
      margin-top: 0.75rem;
      margin-bottom: 1.25rem;
      transition: border-color 0.2s ease, background 0.2s ease;
    }

    .doc-accordion-details:hover {
      border-color: rgba(0, 255, 204, 0.4);
      background: rgba(0, 0, 0, 0.32);
    }

    .doc-accordion-details[open] {
      border-color: rgba(0, 255, 204, 0.5);
      background: rgba(0, 0, 0, 0.38);
    }

    .doc-accordion-summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.75rem 1.1rem;
      cursor: pointer;
      font-family: var(--font-mono);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-secondary);
      user-select: none;
      list-style: none;
      transition: color 0.15s ease, background 0.15s ease;
    }

    .doc-accordion-summary:hover {
      color: var(--text-primary);
    }

    .doc-accordion-summary::-webkit-details-marker {
      display: none;
    }

    .doc-accordion-summary-left {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      flex-wrap: wrap;
    }

    .doc-accordion-count-badge {
      display: inline-block;
      font-family: var(--font-mono);
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      padding: 0.15rem 0.45rem;
      color: var(--accent-cyan);
      background: rgba(0, 255, 204, 0.1);
      border: 1px solid rgba(0, 255, 204, 0.3);
      border-radius: 0;
      line-height: 1;
      text-transform: uppercase;
      transition: all 0.2s ease;
    }

    .doc-accordion-details[open] .doc-accordion-count-badge {
      background: rgba(0, 255, 204, 0.18);
      border-color: rgba(0, 255, 204, 0.6);
      box-shadow: 0 0 8px rgba(0, 255, 204, 0.25);
    }

    .doc-accordion-chevron {
      width: 14px;
      height: 14px;
      stroke: currentColor;
      color: var(--text-secondary);
      transition: transform 0.2s ease, color 0.2s ease;
      flex-shrink: 0;
    }

    .doc-accordion-details[open] .doc-accordion-chevron {
      transform: rotate(90deg);
      color: var(--accent-cyan);
    }

    .doc-accordion-content {
      padding: 0;
      border-top: 1px solid var(--panel-border-subtle);
    }

    .doc-accordion-content .table-container,
    .doc-accordion-content .table-responsive {
      margin: 0;
      border: none;
    }

    /* Sub-App Theming Overrides for Table Accordions */
    .football-pane .doc-accordion-details:hover {
      border-color: rgba(0, 255, 102, 0.4);
    }
    .football-pane .doc-accordion-details[open] {
      border-color: rgba(0, 255, 102, 0.5);
    }
    .football-pane .doc-accordion-details[open] .doc-accordion-chevron {
      color: var(--pitch-green);
    }
    .football-pane .doc-accordion-count-badge {
      color: var(--pitch-green);
      border-color: rgba(0, 255, 102, 0.35);
      background: rgba(0, 255, 102, 0.1);
    }
    .football-pane .doc-accordion-details[open] .doc-accordion-count-badge {
      background: rgba(0, 255, 102, 0.18);
      border-color: rgba(0, 255, 102, 0.6);
      box-shadow: 0 0 8px rgba(0, 255, 102, 0.25);
    }

    .liambot-pane .doc-accordion-details:hover {
      border-color: rgba(192, 132, 252, 0.4);
    }
    .liambot-pane .doc-accordion-details[open] {
      border-color: rgba(192, 132, 252, 0.5);
    }
    .liambot-pane .doc-accordion-details[open] .doc-accordion-chevron {
      color: var(--accent-violet);
    }
    .liambot-pane .doc-accordion-count-badge {
      color: var(--accent-violet);
      border-color: rgba(192, 132, 252, 0.35);
      background: rgba(192, 132, 252, 0.1);
    }
    .liambot-pane .doc-accordion-details[open] .doc-accordion-count-badge {
      background: rgba(192, 132, 252, 0.18);
      border-color: rgba(192, 132, 252, 0.6);
      box-shadow: 0 0 8px rgba(192, 132, 252, 0.25);
    }

    .caseycase-pane .doc-accordion-count-badge {
      color: var(--accent-pink);
      border-color: rgba(255, 51, 136, 0.35);
      background: rgba(255, 51, 136, 0.1);
    }
    .caseycase-pane .doc-accordion-details[open] .doc-accordion-count-badge {
      background: rgba(255, 51, 136, 0.18);
      border-color: rgba(255, 51, 136, 0.6);
      box-shadow: 0 0 8px rgba(255, 51, 136, 0.25);
    }
    .caseycase-pane .doc-accordion-details[open] .doc-accordion-chevron {
      color: var(--accent-pink);
    }

    .patch-entries,
    .patch-group-content {
      padding: 0.85rem;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
      border-top: 1px solid var(--panel-border-subtle);
    }

    .patch-entry,
    .release-entry.patch-entry {
      background: rgba(0, 0, 0, 0.2);
      border: 1px solid var(--panel-border-subtle);
      border-radius: 0;
      padding: 0.85rem 1rem;
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      min-width: 0;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .patch-entry-header {
      display: flex;
      align-items: center;
      justify-content: flex-start;
      flex-wrap: wrap;
      gap: 0.5rem;
    }

    .patch-version {
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 0.85rem;
      color: var(--text-primary);
    }

    .patch-date {
      font-family: var(--font-mono);
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-left: auto;
    }

    .release-entry {
      background: rgba(0, 0, 0, 0.25);
      border: 1px solid var(--panel-border-subtle);
      border-radius: 0;
      padding: 1rem 1.15rem;
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
      min-width: 0;
      content-visibility: auto;
      contain-intrinsic-size: auto none auto 180px;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .doc-accordion-details:not([open]),
    .patch-group-details:not([open]),
    .older-releases-details:not([open]) {
      content-visibility: auto;
      contain-intrinsic-size: auto none auto 48px;
    }

    .release-entry-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 0.5rem;
    }

    .release-title-group {
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }

    .release-version {
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-primary);
    }

    .release-date {
      font-family: var(--font-mono);
      font-size: 0.8rem;
      color: var(--text-secondary);
    }

    .release-list {
      list-style-type: disc;
      padding-left: 1.2rem;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 0.45rem;
      font-size: 0.88rem;
      color: var(--text-secondary);
      line-height: 1.5;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .patch-list {
      list-style-type: disc;
      padding-left: 1.2rem;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 0.45rem;
      font-size: 0.84rem;
      color: var(--text-secondary);
      line-height: 1.5;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .release-list li {
      font-size: 0.88rem;
      line-height: 1.5;
      color: var(--text-secondary);
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .patch-list li {
      font-size: 0.84rem;
      line-height: 1.5;
      color: var(--text-secondary);
      overflow-wrap: break-word;
      word-break: break-word;
    }

    .release-list li strong,
    .patch-list li strong {
      color: var(--accent-amber);
    }

    .release-list code {
      font-family: var(--font-mono);
      font-size: 0.82rem;
      background: rgba(255, 255, 255, 0.05);
      padding: 0.1rem 0.35rem;
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 0;
      word-break: break-word;
      overflow-wrap: anywhere;
    }

    .patch-list code {
      font-family: var(--font-mono);
      font-size: 0.78rem;
      background: rgba(255, 255, 255, 0.05);
      padding: 0.1rem 0.35rem;
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 0;
      word-break: break-word;
      overflow-wrap: anywhere;
    }

    /* Core Monorepo & Help Hub Changelog Modal Subsystem */
    .footer-version-btn {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: var(--text-secondary);
      padding: 0.35rem 0.75rem;
      font-family: var(--font-mono);
      font-size: 0.78rem;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      user-select: none;
      text-decoration: none;
      border-radius: 0;
    }

    .footer-version-btn:hover {
      background: var(--active-accent-bg-hover);
      border-color: var(--active-accent);
      color: var(--active-accent);
      transform: translateY(-1px);
      box-shadow: 0 0 12px var(--active-accent-glow);
    }

    .footer-dot-pulse {
      width: 6px;
      height: 6px;
      background: var(--active-accent, #33ff33);
      box-shadow: 0 0 8px var(--active-accent-glow);
      display: inline-block;
      animation: footerPulse 2s infinite ease-in-out;
      will-change: transform, opacity;
      transform: translateZ(0);
    }

    @keyframes footerPulse {
      0%, 100% { opacity: 0.4; transform: scale(0.9) translateZ(0); }
      50% { opacity: 1; transform: scale(1.15) translateZ(0); }
    }

    .footer-changelog-tag {
      background: rgba(255, 255, 255, 0.08);
      padding: 1px 6px;
      font-size: 0.64rem;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--text-secondary);
      border: 1px solid rgba(255, 255, 255, 0.06);
    }

    .footer-version-btn:hover .footer-changelog-tag {
      background: var(--active-accent-bg-active);
      color: var(--active-accent);
      border-color: var(--active-accent);
    }

    .footer-changelog-icon {
      opacity: 0.6;
      transition: opacity 0.2s ease, transform 0.2s ease;
    }

    .footer-version-btn:hover .footer-changelog-icon {
      opacity: 1;
      transform: translateX(1px);
    }

    .core-changelog-backdrop {
      position: fixed;
      inset: 0;
      z-index: 1200;
      background: rgba(0, 0, 0, 0.82);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      display: flex;
      align-items: flex-start;
      justify-content: center;
      padding: 1.25rem 1.5rem;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.25s ease;
      overflow-y: auto;
      box-sizing: border-box;
    }

    .core-changelog-backdrop.open {
      opacity: 1;
      pointer-events: auto;
    }

    .core-changelog-modal {
      background: rgba(13, 17, 23, 0.98);
      border: 1px solid var(--active-accent-border, var(--panel-border));
      width: 100%;
      max-width: 980px;
      height: calc(100vh - 2.5rem);
      max-height: calc(100vh - 2.5rem);
      display: flex;
      flex-direction: column;
      box-shadow: 0 24px 64px rgba(0, 0, 0, 0.85), 0 0 32px var(--active-accent-glow);
      transform: translateY(8px) scale(0.99);
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      margin: 0 auto;
      box-sizing: border-box;
    }

    .core-changelog-backdrop.open .core-changelog-modal {
      transform: translateY(0) scale(1);
    }

    .core-changelog-header {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 1rem;
      padding: 1.25rem 1.5rem;
      border-bottom: 1px solid var(--panel-border);
      background: rgba(255, 255, 255, 0.02);
    }

    .core-changelog-header-left {
      display: flex;
      align-items: flex-start;
      gap: 0.85rem;
      flex: 1;
      min-width: 0;
    }

    .core-changelog-icon {
      color: var(--active-accent, #33ff33);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      width: 22px;
      height: 22px;
      margin-top: 1px;
    }

    .core-changelog-title {
      font-size: 1.15rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      line-height: 1.3;
      margin: 0;
      color: var(--text-primary);
    }

    .core-changelog-subtitle {
      font-size: 0.76rem;
      font-family: var(--font-mono);
      color: var(--text-secondary);
      margin: 4px 0 0 0;
      line-height: 1.35;
    }

    .core-changelog-close-btn {
      width: 32px;
      height: 32px;
      min-width: 32px;
      min-height: 32px;
      max-width: 32px;
      max-height: 32px;
      aspect-ratio: 1 / 1;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--panel-border);
      color: var(--text-secondary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.2s ease;
      padding: 0;
      flex-shrink: 0;
      align-self: flex-start;
      border-radius: 0;
      box-sizing: border-box;
    }

    .core-changelog-close-btn:hover {
      background: rgba(255, 68, 68, 0.15);
      border-color: #ff4444;
      color: #ff4444;
    }

    .core-changelog-nav {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      padding: 0.75rem 1.5rem;
      background: rgba(0, 0, 0, 0.35);
      border-bottom: 1px solid var(--panel-border);
      overflow-x: auto;
      box-sizing: border-box;
      min-height: 52px;
    }

    .core-filter-btn {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: var(--text-secondary);
      height: 32px;
      padding: 0 12px;
      font-family: var(--font-mono);
      font-size: 0.74rem;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.2s ease;
      white-space: nowrap;
      box-sizing: border-box;
      line-height: 1;
      border-radius: 0;
    }

    .core-filter-btn:hover {
      background: var(--active-accent-bg-hover);
      border-color: var(--active-accent);
      color: var(--active-accent);
    }

    .core-filter-btn.active {
      background: var(--active-accent-bg-active);
      border-color: var(--active-accent);
      color: var(--active-accent);
      box-shadow: 0 0 12px var(--active-accent-glow);
    }

    .core-filter-badge {
      background: rgba(255, 255, 255, 0.1);
      padding: 2px 6px;
      font-size: 0.65rem;
      border-radius: 2px;
      display: inline-flex;
      align-items: center;
      line-height: 1;
      box-sizing: border-box;
    }

    .core-filter-btn.active .core-filter-badge {
      background: var(--active-accent);
      color: #000;
      font-weight: 700;
    }

    .core-changelog-body {
      flex: 1;
      overflow-y: auto;
      padding: 1.5rem;
      scrollbar-width: thin;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .core-stream-banner {
      background: rgba(255, 255, 255, 0.02);
      border-left: 3px solid var(--active-accent, #33ff33);
      padding: 0.75rem 1rem;
      margin-bottom: 1rem;
    }

    .core-stream-banner-title {
      font-weight: 700;
      font-size: 0.88rem;
      color: var(--text-primary);
      display: flex;
      align-items: flex-start;
      gap: 0.55rem;
      line-height: 1.3;
    }

    .core-stream-icon {
      color: var(--active-accent, #33ff33);
      flex-shrink: 0;
      width: 16px;
      height: 16px;
      margin-top: 1px;
    }

    .core-filter-icon {
      flex-shrink: 0;
      opacity: 0.75;
      transition: opacity 0.2s ease;
    }

    .core-filter-btn:hover .core-filter-icon,
    .core-filter-btn.active .core-filter-icon {
      opacity: 1;
    }

    .core-stream-banner-desc {
      font-size: 0.76rem;
      color: var(--text-secondary);
      margin: 3px 0 0 0;
    }

    .core-changelog-footer {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      padding: 0.85rem 1.5rem;
      border-top: 1px solid var(--panel-border);
      background: rgba(0, 0, 0, 0.4);
      font-size: 0.74rem;
      color: var(--text-secondary);
    }

    .core-changelog-kbd kbd {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: var(--text-primary);
      padding: 2px 5px;
      font-family: var(--font-mono);
      font-size: 0.65rem;
      border-radius: 3px;
    }

    @media (max-width: 768px) {
      .core-changelog-backdrop {
        padding: 0.75rem 0.75rem;
      }
      .core-changelog-modal {
        height: calc(100vh - 1.5rem);
        max-height: calc(100vh - 1.5rem);
      }
      .core-changelog-header {
        padding: 1rem 1.15rem;
        gap: 0.75rem;
      }
      .core-changelog-body {
        padding: 1rem 1.15rem;
      }
      .core-changelog-nav {
        padding: 0.6rem 1.15rem;
      }
      .core-changelog-footer {
        padding: 0.75rem 1.15rem;
      }
    }


    /* Core Monorepo & Help Hub Changelog Modal Subsystem */
    .footer-version-btn {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: var(--text-secondary);
      padding: 0.35rem 0.75rem;
      font-family: var(--font-mono);
      font-size: 0.78rem;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      user-select: none;
      text-decoration: none;
      border-radius: 0;
    }

    .footer-version-btn:hover {
      background: var(--active-accent-bg-hover);
      border-color: var(--active-accent);
      color: var(--active-accent);
      transform: translateY(-1px);
      box-shadow: 0 0 12px var(--active-accent-glow);
    }

    .footer-dot-pulse {
      width: 6px;
      height: 6px;
      background: var(--active-accent, #33ff33);
      box-shadow: 0 0 8px var(--active-accent-glow);
      display: inline-block;
      animation: footerPulse 2s infinite ease-in-out;
      will-change: transform, opacity;
      transform: translateZ(0);
    }

    @keyframes footerPulse {
      0%, 100% { opacity: 0.4; transform: scale(0.9) translateZ(0); }
      50% { opacity: 1; transform: scale(1.15) translateZ(0); }
    }

    .footer-changelog-tag {
      background: rgba(255, 255, 255, 0.08);
      padding: 1px 6px;
      font-size: 0.64rem;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--text-secondary);
      border: 1px solid rgba(255, 255, 255, 0.06);
    }

    .footer-version-btn:hover .footer-changelog-tag {
      background: var(--active-accent-bg-active);
      color: var(--active-accent);
      border-color: var(--active-accent);
    }

    .footer-changelog-icon {
      opacity: 0.6;
      transition: opacity 0.2s ease, transform 0.2s ease;
    }

    .footer-version-btn:hover .footer-changelog-icon {
      opacity: 1;
      transform: translateX(1px);
    }

    .core-changelog-backdrop {
      position: fixed;
      inset: 0;
      z-index: 1200;
      background: rgba(0, 0, 0, 0.82);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      display: flex;
      align-items: flex-start;
      justify-content: center;
      padding: 1.25rem 1.5rem;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.25s ease;
      overflow-y: auto;
      box-sizing: border-box;
    }

    .core-changelog-backdrop.open {
      opacity: 1;
      pointer-events: auto;
    }

    .core-changelog-modal {
      background: rgba(13, 17, 23, 0.98);
      border: 1px solid var(--active-accent-border, var(--panel-border));
      width: 100%;
      max-width: 980px;
      height: calc(100vh - 2.5rem);
      max-height: calc(100vh - 2.5rem);
      display: flex;
      flex-direction: column;
      box-shadow: 0 24px 64px rgba(0, 0, 0, 0.85), 0 0 32px var(--active-accent-glow);
      transform: translateY(8px) scale(0.99);
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      margin: 0 auto;
      box-sizing: border-box;
    }

    @media (max-width: 768px) {
      .core-changelog-backdrop {
        padding: 0.75rem 0.75rem;
      }
      .core-changelog-modal {
        height: calc(100vh - 1.5rem);
        max-height: calc(100vh - 1.5rem);
      }
      .core-changelog-header {
        padding: 1rem 1.15rem;
        gap: 0.75rem;
      }
      .core-changelog-body {
        padding: 1rem 1.15rem;
      }
      .core-changelog-nav {
        padding: 0.6rem 1.15rem;
      }
      .core-changelog-footer {
        padding: 0.75rem 1.15rem;
      }
    }

    .core-changelog-backdrop.open .core-changelog-modal {
      transform: translateY(0) scale(1);
    }

    .core-changelog-header {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 1rem;
      padding: 1.25rem 1.5rem;
      border-bottom: 1px solid var(--panel-border);
      background: rgba(255, 255, 255, 0.02);
    }

    .core-changelog-header-left {
      display: flex;
      align-items: flex-start;
      gap: 0.85rem;
      flex: 1;
      min-width: 0;
    }

    .core-changelog-icon {
      color: var(--active-accent, #33ff33);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      width: 22px;
      height: 22px;
      margin-top: 1px;
    }

    .core-changelog-title {
      font-size: 1.15rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      line-height: 1.3;
      margin: 0;
      color: var(--text-primary);
    }

    .core-changelog-subtitle {
      font-size: 0.76rem;
      font-family: var(--font-mono);
      color: var(--text-secondary);
      margin: 4px 0 0 0;
      line-height: 1.35;
    }

    .core-changelog-close-btn {
      width: 32px;
      height: 32px;
      min-width: 32px;
      min-height: 32px;
      max-width: 32px;
      max-height: 32px;
      aspect-ratio: 1 / 1;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--panel-border);
      color: var(--text-secondary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.2s ease;
      padding: 0;
      flex-shrink: 0;
      align-self: flex-start;
      border-radius: 0;
      box-sizing: border-box;
    }

    .core-changelog-close-btn:hover {
      background: rgba(255, 68, 68, 0.15);
      border-color: #ff4444;
      color: #ff4444;
    }

    .core-changelog-nav {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      padding: 0.75rem 1.5rem;
      background: rgba(0, 0, 0, 0.35);
      border-bottom: 1px solid var(--panel-border);
      overflow-x: auto;
      box-sizing: border-box;
      min-height: 52px;
    }

    .core-filter-btn {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: var(--text-secondary);
      height: 32px;
      padding: 0 12px;
      font-family: var(--font-mono);
      font-size: 0.74rem;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.2s ease;
      white-space: nowrap;
      box-sizing: border-box;
      line-height: 1;
      border-radius: 0;
    }

    .core-filter-btn:hover {
      background: var(--active-accent-bg-hover);
      border-color: var(--active-accent);
      color: var(--active-accent);
    }

    .core-filter-btn.active {
      background: var(--active-accent-bg-active);
      border-color: var(--active-accent);
      color: var(--active-accent);
      box-shadow: 0 0 12px var(--active-accent-glow);
    }

    .core-filter-badge {
      background: rgba(255, 255, 255, 0.1);
      padding: 2px 6px;
      font-size: 0.65rem;
      border-radius: 2px;
      display: inline-flex;
      align-items: center;
      line-height: 1;
      box-sizing: border-box;
    }

    .core-filter-btn.active .core-filter-badge {
      background: var(--active-accent);
      color: #000;
      font-weight: 700;
    }

    .core-changelog-body {
      flex: 1;
      overflow-y: auto;
      padding: 1.5rem;
      scrollbar-width: thin;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .core-stream-banner {
      background: rgba(255, 255, 255, 0.02);
      border-left: 3px solid var(--active-accent, #33ff33);
      padding: 0.75rem 1rem;
      margin-bottom: 1rem;
    }

    .core-stream-banner-title {
      font-weight: 700;
      font-size: 0.88rem;
      color: var(--text-primary);
      display: flex;
      align-items: flex-start;
      gap: 0.55rem;
      line-height: 1.3;
    }

    .core-stream-icon {
      color: var(--active-accent, #33ff33);
      flex-shrink: 0;
      width: 16px;
      height: 16px;
      margin-top: 1px;
    }

    .core-filter-icon {
      flex-shrink: 0;
      opacity: 0.75;
      transition: opacity 0.2s ease;
    }

    .core-filter-btn:hover .core-filter-icon,
    .core-filter-btn.active .core-filter-icon {
      opacity: 1;
    }

    .core-stream-banner-desc {
      font-size: 0.76rem;
      color: var(--text-secondary);
      margin: 3px 0 0 0;
    }

    .core-changelog-footer {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      padding: 0.85rem 1.5rem;
      border-top: 1px solid var(--panel-border);
      background: rgba(0, 0, 0, 0.4);
      font-size: 0.74rem;
      color: var(--text-secondary);
    }

    .core-changelog-kbd kbd {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: var(--text-primary);
      padding: 2px 5px;
      font-family: var(--font-mono);
      font-size: 0.65rem;
      border-radius: 3px;
    }