:root {
      --bg-color: #0b0f19;
      --panel-bg: rgba(22, 27, 44, 0.7);
      --border-color: rgba(255, 255, 255, 0.08);
      --panel-border: rgba(255, 255, 255, 0.08);
      --accent-cyan: #4fa2b8;
      --border-focus: var(--accent-cyan);
      --text-primary: #f3f4f6;
      --text-secondary: #9ca3af;
      --text-muted: #6b7280;
      
      --primary-gradient: linear-gradient(135deg, #62b2c9 0%, #4396ab 100%);
      --glow-cyan: 0 0 30px rgba(79, 162, 184, 0.15);
      --glow-indigo: 0 0 30px rgba(79, 162, 184, 0.15);
      --btn-shadow: 0 0 20px rgba(79, 162, 184, 0.3);
      
      --font-heading: 'Orbitron', 'Outfit', sans-serif;
      --font-body: 'Inter', sans-serif;
      --font-mono: 'JetBrains Mono', monospace;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      background-color: var(--bg-color);
      color: var(--text-primary);
      font-family: var(--font-body);
      min-height: 100vh;
      overflow-x: hidden;
      background-image: 
        radial-gradient(at 10% 20%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
        radial-gradient(at 90% 80%, rgba(79, 162, 184, 0.12) 0px, transparent 50%);
      background-attachment: fixed;
    }

    .container {
      width: 100%;
      max-width: 1100px;
      margin: 0 auto;
      padding: 1.25rem 1.25rem 3rem 1.25rem;
      min-width: 0;
      box-sizing: border-box;
      animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    }

    /* Floating Header Card */
    .app-header {
      position: relative;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1rem 1.5rem;
      background: var(--panel-bg);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border: 1px solid var(--border-color);
      border-radius: 0;
      margin-bottom: 1.25rem;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    }

    .brand-group {
      display: flex;
      align-items: center;
      gap: 0.85rem;
      text-decoration: none;
    }

    .brand-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      background: rgba(79, 162, 184, 0.12);
      border: 1px solid rgba(79, 162, 184, 0.35);
      border-radius: 0;
      color: #4fa2b8;
      box-shadow: 0 0 16px rgba(79, 162, 184, 0.22);
      flex-shrink: 0;
    }

    .brand-icon svg {
      width: 24px;
      height: 24px;
      color: #4fa2b8;
      filter: drop-shadow(0 0 6px rgba(79, 162, 184, 0.45));
    }

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

    .brand-title {
      font-family: var(--font-heading);
      font-weight: 800;
      font-size: 1.25rem;
      color: #ffffff;
      line-height: 1;
      margin: 0;
    }

    .brand-title-accent {
      color: #4fa2b8;
      text-shadow: 0 0 12px rgba(79, 162, 184, 0.35);
    }

    .badge-version {
      font-family: var(--font-mono);
      font-size: 0.68rem;
      font-weight: 600;
      letter-spacing: 0.05em;
      padding: 0.12rem 0.45rem;
      background: rgba(79, 162, 184, 0.12);
      border: 1px solid rgba(79, 162, 184, 0.35);
      color: #4fa2b8;
      display: inline-flex;
      align-items: center;
      white-space: nowrap;
      flex-shrink: 0;
      -webkit-text-fill-color: #4fa2b8;
      line-height: 1.2;
      transform: translateY(-1px);
    }

    .brand-subtitle {
      font-family: var(--font-mono);
      font-size: 0.7rem;
      color: var(--text-secondary);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      line-height: 1;
      margin: 5px 0 0 0;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(12px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .card {
      background: var(--panel-bg);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border: 1px solid var(--border-color);
      border-radius: 0;
      padding: 2.25rem 2.5rem;
      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.4);
      position: relative;
      overflow: visible;
    }

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

    /* Tabs Navigation */
    .tabs-nav {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      width: 100%;
      background: rgba(20, 21, 24, 0.95);
      border: 1px solid var(--border-color);
      border-radius: 0;
      padding: 0.35rem;
      gap: 0.35rem;
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    }

    .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);
      padding: 0.6rem 1.35rem;
      font-family: var(--font-heading);
      font-size: 0.88rem;
      font-weight: 700;
      letter-spacing: 0.03em;
      text-transform: none;
      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 svg {
      width: 15px;
      height: 15px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2;
      flex-shrink: 0;
    }

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

    .tab-btn.active {
      color: #4fa2b8;
      background: rgba(79, 162, 184, 0.14);
      border-color: #4fa2b8;
      box-shadow: 0 0 16px rgba(79, 162, 184, 0.35) !important;
    }

    .tab-btn:focus-visible {
      outline: 2px solid var(--border-focus);
      outline-offset: -2px;
    }

    /* Forms */
    .form-group {
      margin-bottom: 1.25rem;
      position: relative;
    }

    .form-row {
      display: flex;
      gap: 1rem;
      margin-bottom: 1.25rem;
    }

    .form-row .form-group {
      flex: 1;
      margin-bottom: 0;
    }

    .label-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 0.6rem;
    }

    label {
      font-family: var(--font-heading);
      font-weight: 600;
      font-size: 0.85rem;
      color: #38bdf8;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }


    .input-container {
      position: relative;
    }

    textarea {
      width: 100%;
      min-height: 120px;
      background: rgba(8, 11, 17, 0.6);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 1rem 3rem 1rem 1rem;
      color: var(--text-primary);
      font-family: var(--font-body);
      font-size: 1rem;
      line-height: 1.6;
      resize: vertical;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.25);
    }

    textarea:focus {
      outline: none;
      border-color: var(--border-focus);
      box-shadow: 0 0 0 4px rgba(79, 162, 184, 0.15), inset 0 2px 4px rgba(0, 0, 0, 0.25);
    }

    .text-input {
      width: 100%;
      height: 48px;
      background: rgba(8, 11, 17, 0.6);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 0 1rem;
      color: var(--text-primary);
      font-family: var(--font-body);
      font-size: 1rem;
      transition: all 0.3s ease;
      box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
    }

    .text-input:focus {
      outline: none;
      border-color: var(--border-focus);
      box-shadow: 0 0 0 4px rgba(79, 162, 184, 0.15), inset 0 2px 4px rgba(0, 0, 0, 0.2);
    }

    textarea:focus-visible, .text-input:focus-visible {
      outline: 2px solid var(--border-focus);
      outline-offset: 2px;
    }

    .btn-clear {
      position: absolute;
      right: 12px;
      top: 12px;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 6px;
      border-radius: 50%;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
      opacity: 0;
      pointer-events: none;
    }

    .btn-clear.visible {
      opacity: 1;
      pointer-events: auto;
    }

    .btn-clear:hover {
      color: var(--text-primary);
      background: rgba(255, 255, 255, 0.08);
    }

    .btn-clear svg {
      width: 16px;
      height: 16px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2.5;
    }

    .controls-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1.5rem;
      gap: 1rem;
    }

    .toggle-container {
      display: flex;
      align-items: center;
      gap: 0.65rem;
      cursor: pointer;
      user-select: none;
    }

    .toggle-label {
      font-size: 0.9rem;
      color: #7dd3fc;
      font-weight: 500;
    }

    .custom-checkbox {
      width: 44px;
      height: 24px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 0;
      position: relative;
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }

    .checkbox-hidden {
      position: absolute;
      opacity: 0;
      width: 0;
      height: 0;
    }

    .checkbox-hidden:checked + .custom-checkbox {
      background: #4fa2b8;
      box-shadow: 0 0 10px rgba(79, 162, 184, 0.35);
    }

    .custom-checkbox::after {
      content: '';
      position: absolute;
      width: 18px;
      height: 18px;
      border-radius: 0px !important;
      background: white;
      top: 3px;
      left: 3px;
      transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      box-shadow: none !important;
    }

    .checkbox-hidden:checked + .custom-checkbox::after {
      transform: translateX(20px);
    }

    .checkbox-hidden:focus-visible + .custom-checkbox {
      outline: 2px solid var(--border-focus);
      outline-offset: 2px;
    }

    .btn-convert {
      background: var(--primary-gradient);
      color: white;
      border: none;
      padding: 0.85rem 1.6rem;
      border-radius: 0;
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 0.95rem;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: var(--btn-shadow);
    }

    .btn-convert:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(79, 162, 184, 0.45);
    }

    .btn-convert:active {
      transform: translateY(1px);
    }

    .btn-convert:disabled {
      background: rgba(255, 255, 255, 0.08);
      color: var(--text-muted);
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
    }

    .btn-convert svg {
      width: 18px;
      height: 18px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2;
    }

    /* Output Card */
    .output-card {
      background: rgba(8, 11, 17, 0.45);
      border: 1px solid rgba(255, 255, 255, 0.05);
      border-radius: 16px;
      padding: 1.5rem;
      position: relative;
      transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
      margin-top: 1.5rem;
      opacity: 0;
      transform: translateY(10px);
      pointer-events: none;
      display: none;
    }

    .output-card.visible {
      display: block;
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }

    .output-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 0.85rem;
    }

    .output-label {
      font-family: var(--font-heading);
      font-weight: 600;
      font-size: 0.8rem;
      color: #38bdf8;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .btn-copy {
      background: rgba(79, 162, 184, 0.1);
      border: 1px solid rgba(79, 162, 184, 0.3);
      color: #38bdf8;
      padding: 0.45rem 0.9rem;
      border-radius: 0;
      font-family: var(--font-body);
      font-size: 0.8rem;
      font-weight: 600;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      transition: all 0.2s ease;
    }

    .btn-copy:hover {
      color: #ffffff;
      background: rgba(79, 162, 184, 0.22);
      border-color: #4fa2b8;
      box-shadow: 0 0 10px rgba(79, 162, 184, 0.3);
    }

    .btn-copy svg {
      width: 14px;
      height: 14px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2.2;
    }

    .btn-copy.success {
      background: rgba(16, 185, 129, 0.1);
      border-color: rgba(16, 185, 129, 0.25);
      color: #10b981;
    }

    .output-text {
      font-size: 1.15rem;
      line-height: 1.6;
      white-space: pre-wrap;
      word-break: break-word;
      font-weight: 500;
    }

    /* YouTube Import Section */
    .yt-import-section {
      background: rgba(8, 11, 17, 0.35);
      border: 1px solid var(--border-color);
      border-radius: 0;
      padding: 1.25rem;
      margin-bottom: 0;
    }

    .yt-import-header {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      margin-bottom: 0.85rem;
      font-family: var(--font-heading);
      font-size: 0.7rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      color: var(--accent-cyan);
      text-transform: uppercase;
    }

    .yt-import-header svg {
      color: var(--accent-cyan);
      filter: drop-shadow(0 0 4px rgba(79, 162, 184, 0.4));
    }

    .yt-import-controls {
      display: flex;
      gap: 0.6rem;
      align-items: stretch;
    }

    .yt-url-input {
      flex: 1;
      height: 44px;
      font-size: 0.9rem;
      border-radius: 0 !important;
    }

    .yt-download-btn {
      flex-shrink: 0;
      padding: 0 1.2rem;
      font-size: 0.75rem;
      height: 44px;
      white-space: nowrap;
      border-radius: 0 !important;
    }

    .yt-download-btn:disabled {
      pointer-events: none;
    }

    .yt-status {
      margin-top: 0.75rem;
      padding: 0.65rem 0.85rem;
      font-size: 0.82rem;
      font-family: var(--font-mono);
      line-height: 1.5;
      border-radius: 0;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }

    .yt-status.yt-status--loading {
      background: rgba(79, 162, 184, 0.08);
      border: 1px solid rgba(79, 162, 184, 0.2);
      color: var(--accent-cyan);
    }

    .yt-status.yt-status--success {
      background: rgba(34, 197, 94, 0.08);
      border: 1px solid rgba(34, 197, 94, 0.25);
      color: #4ade80;
    }

    .yt-status.yt-status--error {
      background: rgba(239, 68, 68, 0.08);
      border: 1px solid rgba(239, 68, 68, 0.25);
      color: #f87171;
      white-space: pre-wrap;
    }

    .yt-status.yt-status--error a {
      color: inherit;
      font-weight: 600;
      text-decoration: underline;
    }

    .yt-status svg {
      width: 16px;
      height: 16px;
      flex-shrink: 0;
    }

    /* YouTube OR Divider */
    .yt-import-divider {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin: 1rem 0;
    }

    /* An explicit `display` on this class beats the UA stylesheet's `[hidden] { display: none }`
       regardless of selector specificity, since author rules always outrank user-agent rules.
       Without this override the "OR" divider stayed visible even while the YouTube import
       panel above it was hidden and locked. */
    .yt-import-divider[hidden] {
      display: none;
    }

    .yt-import-divider-line {
      flex: 1;
      height: 1px;
      background: var(--border-color);
    }

    .yt-import-divider-text {
      font-family: var(--font-heading);
      font-size: 0.65rem;
      font-weight: 700;
      letter-spacing: 0.15em;
      color: var(--text-muted);
    }

    /* Drag & Drop Zone */
    .drop-zone {
      border: 2px dashed rgba(255, 255, 255, 0.15);
      border-radius: 16px;
      padding: 2.5rem 1.5rem;
      text-align: center;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      background: rgba(8, 11, 17, 0.25);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 0.75rem;
    }

    .drop-zone:hover, .drop-zone--over {
      border-color: var(--border-focus);
      background: rgba(79, 162, 184, 0.04);
      box-shadow: var(--glow-cyan);
    }

    .drop-zone-icon {
      width: 48px;
      height: 48px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-secondary);
      transition: all 0.3s ease;
    }

    .drop-zone:hover .drop-zone-icon, .drop-zone--over .drop-zone-icon {
      color: var(--border-focus);
      background: rgba(79, 162, 184, 0.1);
      border-color: rgba(79, 162, 184, 0.25);
      transform: translateY(-2px);
    }

    .drop-zone-icon svg {
      width: 24px;
      height: 24px;
    }

    .drop-zone-text {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
    }

    .drop-zone-subtext {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* Audio Preview Card */
    .audio-player-card {
      background: rgba(8, 11, 17, 0.45);
      border: 1px solid var(--border-color);
      border-radius: 0;
      padding: 1.25rem;
      margin-bottom: 1.5rem;
    }

    .audio-player-card audio {
      width: 100%;
      height: 40px;
      border-radius: 0;
      filter: invert(1);
      border: 1px solid #f9492b; /* Inverts to cyan blue #4fa2b8 */
    }

    .audio-player-card audio::-webkit-media-controls-enclosure,
    .audio-player-card audio::-webkit-media-controls-panel {
      border-radius: 0 !important;
      background-color: #f5cbb9 !important;
      background: #f5cbb9 !important;
    }

    .file-meta-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
      font-size: 0.85rem;
      margin-top: 0.75rem;
    }

    .file-name-label {
      font-weight: 500;
      color: var(--text-muted);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      max-width: 70%;
    }

    .file-size-label {
      color: var(--text-muted);
    }

    /* Tracks List Styles */
    .track-list-container {
      margin-top: 1.5rem;
      background: rgba(8, 11, 17, 0.3);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 1.25rem;
      box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
    }

    .track-list-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding-bottom: 0.5rem;
    }

    .track-list-title {
      font-family: var(--font-heading);
      font-size: 1rem;
      font-weight: 700;
      color: #38bdf8;
      letter-spacing: 0.04em;
    }

    .track-list-count {
      font-size: 0.8rem;
      color: #38bdf8;
      background: rgba(79, 162, 184, 0.12);
      border: 1px solid rgba(79, 162, 184, 0.25);
      padding: 0.15rem 0.5rem;
      border-radius: 0;
    }

    .tracks-scroll-area {
      padding-right: 0.25rem;
    }

    .track-row-wrapper {
      padding-bottom: 0.5rem;
    }

    .track-list-columns {
      display: flex;
      align-items: center;
      gap: 0.65rem;
      padding: 0.25rem 0.6rem;
      margin-bottom: 0.25rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .track-list-columns .column-heading {
      font-size: 0.75rem;
      font-weight: 600;
      color: #7dd3fc;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .track-list-columns .drag-handle-spacer {
      width: 22px;
      flex-shrink: 0;
    }

    .track-list-columns .play-btn-spacer {
      width: 32px;
      flex-shrink: 0;
    }

    .track-list-columns .col-disc {
      width: 46px;
      text-align: center;
      flex-shrink: 0;
    }

    .track-list-columns .col-track {
      width: 46px;
      text-align: center;
      flex-shrink: 0;
    }

    .track-list-columns .col-title {
      flex: 1.2;
      min-width: 0;
    }

    .track-list-columns .col-artist {
      flex: 0.9;
      min-width: 0;
    }

    .track-row {
      display: flex;
      align-items: center;
      gap: 0.65rem;
      padding: 0.6rem;
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid rgba(255, 255, 255, 0.04);
      border-radius: 12px;
      margin-bottom: 0;
      transition: all 0.2s ease;
    }

    .track-row:hover {
      background: rgba(255, 255, 255, 0.04);
      border-color: rgba(255, 255, 255, 0.08);
    }

    .track-row.active {
      background: rgba(79, 162, 184, 0.06);
      border-color: rgba(79, 162, 184, 0.25);
    }

    .track-row.dragging {
      opacity: 0.4;
      border: 1px dashed var(--border-focus);
    }

    .tracks-scroll-area.drag-active .track-row * {
      pointer-events: none;
    }

    .track-row.drag-over-top {
      border-top: 2px solid var(--border-focus);
    }

    .track-row.drag-over-bottom {
      border-bottom: 2px solid var(--border-focus);
    }

    .drag-handle {
      cursor: grab;
      padding: 0.25rem;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 4px;
      margin-right: -0.1rem;
      user-select: none;
      -webkit-user-drag: none;
      color: var(--text-secondary);
      transition: all 0.2s ease;
    }

    .drag-handle:hover {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-primary);
    }

    .btn-track-play {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      width: 32px;
      height: 32px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-primary);
      cursor: pointer;
      flex-shrink: 0;
      transition: all 0.2s ease;
    }

    .btn-track-play:hover {
      background: var(--primary-gradient);
      border-color: transparent;
      box-shadow: 0 0 10px rgba(79, 162, 184, 0.3);
      transform: scale(1.05);
    }

    .btn-track-play.playing {
      background: var(--primary-gradient);
      border-color: transparent;
      box-shadow: 0 0 15px rgba(79, 162, 184, 0.5);
    }

    .track-row .track-num-input,
    .track-row .track-disc-input {
      width: 46px;
      text-align: center;
      padding: 0.4rem 0.2rem;
      font-size: 0.85rem;
      flex-shrink: 0;
    }

    .track-row .track-title-input {
      flex: 1.2;
      padding: 0.4rem 0.6rem;
      font-size: 0.85rem;
      min-width: 0;
    }

    .track-row .track-artist-input {
      flex: 0.9;
      padding: 0.4rem 0.6rem;
      font-size: 0.85rem;
      min-width: 0;
    }

    /* Suggested case chip */
    .suggestion-row {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      flex-wrap: wrap;
      margin-top: 0.5rem;
    }

    .suggestion-label {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .suggestion-btn {
      background: rgba(79, 162, 184, 0.08);
      border: 1px dashed rgba(79, 162, 184, 0.3);
      color: #4fa2b8;
      padding: 0.25rem 0.6rem;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s ease;
      font-family: var(--font-body);
    }

    .suggestion-btn:hover {
      background: rgba(79, 162, 184, 0.16);
      border-color: #4fa2b8;
      transform: translateY(-1px);
    }

    /* Loading Spinner */
    @keyframes spin {
      to { transform: rotate(360deg); }
    }
    
    /* History log */
    .history-section {
      margin-top: 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 1.5rem;
      display: none;
    }

    .history-section.visible {
      display: block;
    }

    .history-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 0.85rem;
    }

    .history-title {
      font-family: var(--font-heading);
      font-weight: 600;
      font-size: 0.8rem;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }

    .history-title svg {
      width: 14px;
      height: 14px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2.2;
    }

    .btn-clear-history {
      background: transparent;
      border: none;
      color: var(--text-muted);
      font-family: var(--font-body);
      font-size: 0.75rem;
      font-weight: 500;
      cursor: pointer;
      padding: 2px 6px;
      border-radius: 4px;
      transition: all 0.2s ease;
    }

    .btn-clear-history:hover {
      color: #ef4444;
      background: rgba(239, 68, 68, 0.08);
    }

    .history-list {
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
      max-height: 160px;
      overflow-y: auto;
      padding-right: 4px;
    }

    .history-list::-webkit-scrollbar {
      width: 6px;
    }

    .history-list::-webkit-scrollbar-track {
      background: transparent;
    }

    .history-list::-webkit-scrollbar-thumb {
      background: rgba(255, 255, 255, 0.08);
      border-radius: 3px;
    }

    .history-list::-webkit-scrollbar-thumb:hover {
      background: rgba(255, 255, 255, 0.16);
    }

    .history-item {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid rgba(255, 255, 255, 0.04);
      border-radius: 10px;
      padding: 0.65rem 0.85rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
      transition: all 0.2s ease;
      animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    @keyframes slideIn {
      from {
        opacity: 0;
        transform: translateY(-5px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .history-item:hover {
      background: rgba(255, 255, 255, 0.04);
      border-color: rgba(255, 255, 255, 0.08);
    }

    .history-item-text {
      font-size: 0.85rem;
      color: var(--text-secondary);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      max-width: 80%;
      cursor: pointer;
    }

    .history-item-actions {
      display: flex;
      align-items: center;
      gap: 0.35rem;
    }

    .btn-history-copy {
      background: transparent;
      border: none;
      cursor: pointer;
      color: var(--text-muted);
      padding: 4px;
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }

    .btn-history-copy:hover {
      color: var(--text-primary);
      background: rgba(255, 255, 255, 0.06);
    }

    .btn-history-copy svg {
      width: 14px;
      height: 14px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2.2;
    }

    .footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-top: 1.25rem;
      color: var(--text-muted);
      font-size: 0.75rem;
      letter-spacing: 0.02em;
      text-align: left;
      width: 100%;
    }
    
    .footer-left {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

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

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

    .footer a:hover {
      color: #4fa2b8;
      text-decoration: underline;
    }

    .footer-doc-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      border-radius: 4px;
      background: rgba(79, 162, 184, 0.1);
      border: 1px solid rgba(79, 162, 184, 0.3);
      color: #4fa2b8 !important;
      cursor: pointer;
      text-decoration: none !important;
      transition: all 0.2s ease;
    }

    .footer-doc-btn:hover {
      background: rgba(79, 162, 184, 0.25) !important;
      border-color: #4fa2b8 !important;
      box-shadow: 0 0 10px rgba(79, 162, 184, 0.35) !important;
      transform: scale(1.06);
      text-decoration: none !important;
    }

    .btn-help-trigger {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 17px;
      height: 17px;
      border-radius: 50%;
      background: rgba(79, 162, 184, 0.15);
      border: 1px solid rgba(79, 162, 184, 0.4);
      color: #4fa2b8;
      font-size: 0.68rem;
      font-weight: 700;
      cursor: pointer;
      margin-right: 0.35rem;
      vertical-align: middle;
      transition: all 0.2s ease;
      line-height: 1;
      padding: 0;
    }

    .btn-help-trigger:hover {
      background: rgba(79, 162, 184, 0.35);
      border-color: #4fa2b8;
      color: #ffffff;
      transform: scale(1.12);
      box-shadow: 0 0 8px rgba(79, 162, 184, 0.4);
    }

    .help-dialog {
      max-width: 600px;
    }

    .help-dialog-body {
      max-height: 65vh;
      overflow-y: auto;
      padding-right: 0.5rem;
    }

    .help-section {
      margin-bottom: 1.25rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding-bottom: 1rem;
    }

    .help-section:last-child {
      margin-bottom: 0;
      border-bottom: none;
      padding-bottom: 0;
    }

    .help-section h4 {
      margin: 0 0 0.5rem 0;
      font-size: 0.95rem;
      font-weight: 600;
      color: #4fa2b8;
    }

    .help-section p, .help-section li {
      font-size: 0.82rem;
      color: var(--text-secondary);
      line-height: 1.5;
    }

    .help-section ul {
      margin: 0.3rem 0;
      padding-left: 1.2rem;
    }

    .help-section li {
      margin-bottom: 0.35rem;
    }

    .help-section code {
      background: rgba(255, 255, 255, 0.08);
      padding: 0.15rem 0.35rem;
      border-radius: 4px;
      font-family: monospace;
      font-size: 0.8rem;
      color: #38bdf8;
    }

    .help-section kbd {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 3px;
      padding: 0.1rem 0.3rem;
      font-size: 0.75rem;
      font-family: monospace;
    }

    /* Screen Reader Only Utility */
    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
    }

    /* MP3 Artwork Layout Styles */
    .mp3-editor-layout {
      display: flex;
      gap: 1.5rem;
      margin-bottom: 1.5rem;
    }

    .artwork-column {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.75rem;
      width: 180px;
      flex-shrink: 0;
    }

    .artwork-preview-container {
      position: relative;
      width: 180px;
      height: 180px;
      border-radius: 12px;
      overflow: hidden;
      background: rgba(255, 255, 255, 0.03);
      border: 1px dashed rgba(255, 255, 255, 0.15);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }

    .artwork-preview-container:hover {
      background: rgba(255, 255, 255, 0.05);
      border-color: #4fa2b8;
    }

    .artwork-preview-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .artwork-placeholder {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.5rem;
      color: var(--text-secondary);
      font-size: 0.8rem;
    }

    .artwork-placeholder svg {
      width: 32px;
      height: 32px;
      stroke: rgba(255, 255, 255, 0.3);
    }

    .artwork-overlay {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(2px);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 0.85rem;
      opacity: 0;
      transition: opacity 0.2s ease;
      font-weight: 500;
    }

    .artwork-preview-container:hover .artwork-overlay {
      opacity: 1;
    }

    .btn-artwork-search {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      padding: 0.5rem;
      font-size: 0.8rem;
      font-weight: 600;
      border-radius: 0;
      background: rgba(79, 162, 184, 0.08);
      border: 1px solid rgba(79, 162, 184, 0.25);
      color: #38bdf8;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .btn-artwork-search:hover {
      background: rgba(79, 162, 184, 0.2);
      border-color: #4fa2b8;
      color: #ffffff;
      box-shadow: 0 0 10px rgba(79, 162, 184, 0.3);
    }

    .fields-column {
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    /* Modern Dialog styles for Artwork Search */
    .modern-dialog {
      border-radius: 16px;
      background: var(--bg-card);
      color: var(--text);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
      padding: 1.5rem;
      width: 90%;
      max-width: 500px;
      max-height: 80vh;
      border: 1px solid rgba(255, 255, 255, 0.08);
      outline: none;
      margin: auto;
    }

    .modern-dialog::backdrop {
      background: rgba(0, 0, 0, 0.75);
      backdrop-filter: blur(4px);
    }

    .dialog-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1.25rem;
    }

    .dialog-header h3 {
      margin: 0;
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--text);
    }

    .btn-close-dialog {
      background: transparent;
      border: none;
      color: var(--text-secondary);
      cursor: pointer;
      padding: 4px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }

    .btn-close-dialog:hover {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text);
    }

    .search-input-group {
      display: flex;
      gap: 0.5rem;
      margin-bottom: 1.25rem;
    }

    .btn-dialog-search {
      padding: 0.5rem 1.25rem;
      border-radius: 0;
      background: #4fa2b8;
      color: #0d1117;
      border: none;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .btn-dialog-search:hover {
      filter: brightness(1.1);
    }

    .dialog-loading {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.75rem;
      padding: 2.5rem 0;
      color: var(--text-secondary);
      font-size: 0.9rem;
    }

    .artwork-results-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
      gap: 1rem;
      overflow-y: auto;
      max-height: 45vh;
      margin-top: 0.5rem;
      padding-right: 0.25rem;
    }

    .artwork-results-grid::-webkit-scrollbar {
      width: 6px;
    }
    .artwork-results-grid::-webkit-scrollbar-track {
      background: transparent;
    }
    .artwork-results-grid::-webkit-scrollbar-thumb {
      background: rgba(255, 255, 255, 0.12);
      border-radius: 3px;
    }

    .artwork-result-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      background: rgba(255, 255, 255, 0.01);
      border: 1px solid rgba(255, 255, 255, 0.04);
      border-radius: 10px;
      padding: 0.6rem;
      transition: all 0.2s ease;
    }

    .artwork-result-item:hover {
      background: rgba(255, 255, 255, 0.05);
      border-color: #4fa2b8;
      transform: translateY(-2px);
    }

    .artwork-result-item img {
      width: 110px;
      height: 110px;
      border-radius: 6px;
      object-fit: cover;
      margin-bottom: 0.6rem;
      background: rgba(0, 0, 0, 0.2);
    }

    .artwork-result-info {
      font-size: 0.72rem;
      width: 100%;
      overflow: hidden;
    }

    .artwork-result-title {
      font-weight: 600;
      color: var(--text);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-bottom: 0.15rem;
    }

    .artwork-result-artist {
      color: var(--text-secondary);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    /* Header Actions & Global App Navigation Component */
    .header-actions {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      position: relative;
      z-index: 100;
    }

    .header-action-btn {
      width: 34px;
      height: 34px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-color);
      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;
    }

    .header-action-btn svg {
      width: 16px;
      height: 16px;
    }

    .header-action-btn:hover {
      background: rgba(79, 162, 184, 0.15);
      border-color: #4fa2b8;
      color: #4fa2b8;
      transform: translateY(-1px);
    }

    .header-action-btn.active {
      background: rgba(79, 162, 184, 0.2);
      border-color: #4fa2b8;
      color: #4fa2b8;
    }

    .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, 35, 0.96);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(79, 162, 184, 0.3);
      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);
      text-align: left;
      user-select: none;
      font-family: var(--font-body);
    }

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

    .app-nav-title {
      font-family: var(--font-heading);
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: #4fa2b8;
      padding: 3px 8px 6px 8px;
      border-bottom: 1px solid rgba(79, 162, 184, 0.2);
      margin-bottom: 5px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .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;
      border-radius: 4px;
      transition: all 0.15s ease;
      cursor: pointer;
    }

    .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: 3px;
      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: #ff66ff;
      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(--font-heading);
      font-size: 0.85rem;
      font-weight: 600;
      color: #ffffff;
      display: flex;
      align-items: center;
      gap: 5px;
    }

    .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: rgba(79, 162, 184, 0.12);
      border-color: rgba(79, 162, 184, 0.35);
      transform: translateX(-2px);
    }

    .app-nav-link:hover .app-nav-name {
      color: #4fa2b8;
    }

    .app-nav-link:hover .app-nav-sub {
      color: #f3f4f6;
    }

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

    .app-nav-link.current-app {
      background: rgba(79, 162, 184, 0.08);
      border-color: rgba(79, 162, 184, 0.25);
    }

    .app-nav-link.current-app .app-nav-name {
      color: #4fa2b8;
      font-weight: 700;
    }

    .app-nav-active-dot {
      width: 6px;
      height: 6px;
      border-radius: 0;
      background-color: #4fa2b8;
      box-shadow: 0 0 8px rgba(79, 162, 184, 0.85), 0 0 12px rgba(79, 162, 184, 0.45);
      display: inline-block;
      flex-shrink: 0;
    }

    .app-nav-ext {
      opacity: 0.65;
      color: #4fa2b8;
      transition: opacity 0.15s ease, transform 0.15s ease;
    }

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

    @media (max-width: 600px) {
      .app-header {
        padding: 0.85rem 1rem;
      }
      .container {
        padding: 0.75rem 0.75rem 2rem 0.75rem;
        width: 100%;
      }
      .card {
        padding: 1.5rem 1.25rem;
      }
      .tab-switcher-container {
        width: 100%;
        margin-bottom: 1rem;
      }
      .tabs-nav {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        width: 100%;
        gap: 0.4rem;
        padding: 0.4rem;
        margin-bottom: 0;
      }
      .tab-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0.55rem 0.5rem;
        font-size: 0.76rem;
        gap: 0.35rem;
        white-space: nowrap;
      }
      .tab-btn svg {
        width: 13px;
        height: 13px;
      }
      .mp3-editor-layout {
        flex-direction: column;
        align-items: center;
      }
      .artwork-column {
        width: 100%;
        max-width: 180px;
      }
    }

    @media (max-width: 400px) {
      .tab-btn {
        font-size: 0.72rem;
        padding: 0.5rem 0.25rem;
        gap: 0.25rem;
      }
      .tab-btn svg {
        width: 12px;
        height: 12px;
      }
    }
    /* Flat Design Styling Overrides */
    *, *::before, *::after {
      border-radius: 0px !important;
      box-shadow: none !important;
      text-shadow: none !important;
    }