.gear-calculator-wrapper {
    --gc-primary: #0ea5e9;
    --gc-secondary: #f97316;
    --gc-accent: #0ea5e9;
    --gc-glass-bg: rgba(14, 165, 233, 0.08);
    --gc-glass-border: rgba(14, 165, 233, 0.2);
    --gc-grind: #f59e0b;
    --gc-sweet: #10b981;
    --gc-sprint: #ef4444;

    color: var(--text-main);
    padding: 1rem;
  }

  .gear-main-card {
    background: var(--bg-surface, #fff);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 16px;
    overflow: hidden;
    max-width: 1000px;
    margin: 0 auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
  }

  .mode-toggle-bar {
    background: var(--bg-page, #f9fafb);
    border-bottom: 1px solid var(--border-color, #e5e7eb);
    padding: 0.75rem;
  }

  .mode-buttons {
    display: flex;
    gap: 0;
    max-width: 300px;
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color, #e5e7eb);
  }

  .mode-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    background: var(--bg-surface, #fff);
    color: var(--text-base, #1f2937);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
    border-right: 1px solid var(--border-color, #e5e7eb);
  }

  .mode-btn:last-child {
    border-right: none;
  }

  .mode-btn:hover {
    background: var(--gc-glass-bg);
  }

  .mode-btn.active {
    background: var(--gc-primary);
    color: white;
  }

  .block-cadence {
    background: var(--bg-page, #f9fafb);
    padding: 0;
  }

  .cadence-glass {
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 16px;
    margin: 1.5rem;
    padding: 2rem;
    text-align: center;
    background: var(--gc-glass-bg);
    border: 1px solid var(--gc-glass-border);
  }

  .cadence-value {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--gc-accent);
    margin: 0 0 1.5rem;
    letter-spacing: -1px;
  }

  .cadence-value-unit {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-muted, #6b7280);
  }

  .slider-container {
    margin: 1.5rem 0;
  }

  .gc-slider-track {
    width: 100%;
    height: 30px;
    border-radius: 6px;
    background: linear-gradient(
      to right,
      var(--gc-primary) 0%,
      var(--gc-primary) var(--pct, 50%),
      rgba(255, 255, 255, 0.15) var(--pct, 50%),
      rgba(255, 255, 255, 0.15) 100%
    );
    position: relative;
    cursor: pointer;
    border: 1px solid rgba(14, 165, 233, 0.3);
  }

  .gc-slider {
    width: 100%;
    height: 12px;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    cursor: pointer;
    position: relative;
    z-index: 5;
  }

  .gc-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: white;
    border: 3px solid var(--gc-primary);
    cursor: grab;
    box-shadow:
      0 0 0 8px rgba(14, 165, 233, 0.2),
      0 4px 12px rgba(14, 165, 233, 0.3);
    transition: all 0.2s ease;
  }

  .gc-slider::-webkit-slider-thumb:active {
    cursor: grabbing;
    transform: scale(1.1);
    box-shadow:
      0 0 0 12px rgba(14, 165, 233, 0.25),
      0 6px 16px rgba(14, 165, 233, 0.4);
  }

  .gc-slider::-moz-range-thumb {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: white;
    border: 3px solid var(--gc-primary);
    cursor: grab;
    box-shadow:
      0 0 0 8px rgba(14, 165, 233, 0.2),
      0 4px 12px rgba(14, 165, 233, 0.3);
  }

  .cadence-zone-indicator {
    margin-top: 1.5rem;
  }

  .zone-bar {
    display: flex;
    align-items: center;
    height: 24px;
    border-radius: 12px;
    overflow: hidden;
    background: var(--gc-glass-bg);
    position: relative;
    margin-bottom: 0.75rem;
  }

  .zone-segment {
    flex: 1;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.3px;
  }

  .zone-segment.grind {
    background: var(--gc-grind);
    flex: 0.8;
  }

  .zone-segment.sweet {
    background: var(--gc-sweet);
    flex: 1.2;
  }

  .zone-segment.sprint {
    background: var(--gc-sprint);
    flex: 0.8;
  }

  .zone-marker {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 3px;
    background: white;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
    z-index: 10;
    transition: left 0.3s ease-out;
  }

  .zone-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gc-accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
  }

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

  .block-config {
    background: var(--bg-surface, #fff);
    padding: 1.5rem;
  }

  .control-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
  }

  .control-section {
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 12px;
    padding: 1.5rem;
    background: var(--gc-glass-bg);
    border: 1px solid var(--gc-glass-border);
  }

  .control-section.hidden {
    display: none;
  }

  .section-title {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--gc-accent);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  .input-group {
    margin-bottom: 1rem;
  }

  .input-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted, #6b7280);
    margin-bottom: 0.5rem;
    font-weight: 600;
  }

  .label-with-tooltip {
    display: flex;
    align-items: center;
    gap: 0.4rem;
  }

  .tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    background: var(--gc-accent);
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: bold;
    cursor: help;
    flex-shrink: 0;
  }

  .preset-select {
    width: 100%;
    background: var(--bg-page, #f9fafb);
    border: 1px solid var(--border-color, #e5e7eb);
    color: var(--text-base, #1f2937);
    border-radius: 8px;
    padding: 0.75rem;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
  }

  .preset-select:hover {
    border-color: var(--gc-accent);
    background: var(--bg-surface, #fff);
  }

  .preset-select:focus {
    outline: none;
    border-color: var(--gc-accent);
    background: var(--bg-surface, #fff);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
  }

  .advanced-settings {
    margin-top: 1rem;
    border-top: 1px solid var(--border-color, #e5e7eb);
    padding-top: 1rem;
  }

  .advanced-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gc-accent);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    padding: 0;
    border: none;
    background: none;
    user-select: none;
    margin-bottom: 0.75rem;
  }

  .advanced-toggle::after {
    content: "▼";
    display: inline-block;
    font-size: 0.7rem;
    transition: transform 0.3s ease;
  }

  .advanced-settings[open] .advanced-toggle::after {
    transform: rotate(180deg);
  }

  .advanced-settings[open] > div {
    animation: slide-down 0.3s ease-out;
  }

  @keyframes slide-down {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }

    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .input-field {
    width: 100%;
    background: var(--bg-page, #f9fafb);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    padding: 0.75rem;
    color: var(--text-base, #1f2937);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
  }

  .input-field:focus {
    outline: none;
    border-color: var(--gc-accent);
    background: var(--bg-surface, #fff);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
  }

  .tire-search {
    width: 100%;
    background: var(--bg-page, #f9fafb);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    padding: 0.75rem;
    color: var(--text-base, #1f2937);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    transition: all 0.2s ease;
  }

  .tire-search:focus {
    outline: none;
    border-color: var(--gc-accent);
    background: var(--bg-surface, #fff);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
  }

  .tag-input-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    background: var(--bg-page, #f9fafb);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    padding: 0.4rem;
    min-height: 40px;
  }

  .gear-tag {
    background: var(--gc-accent);
    color: white;
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.3rem;
  }

  .gear-tag button {
    background: transparent;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    line-height: 1;
    opacity: 0.8;
    transition: opacity 0.2s;
  }

  .gear-tag button:hover {
    opacity: 1;
  }

  .tag-add {
    background: transparent;
    border: none;
    color: var(--text-muted, #6b7280);
    flex-grow: 1;
    min-width: 50px;
    outline: none;
    font-size: 0.9rem;
    padding: 0.2rem;
  }

  .block-results {
    background: var(--bg-surface, #fff);
    padding: 1.5rem;
  }

  .viz-section {
    margin-bottom: 2rem;
  }

  .section-subtitle {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--gc-accent);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  .section-desc {
    font-size: 0.85rem;
    color: var(--text-muted, #6b7280);
    margin: 0 0 1rem;
  }

  .overlap-chart {
    background: var(--gc-glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--gc-glass-border);
    border-radius: 12px;
    padding: 1.5rem;
    overflow-x: auto;
  }

  .gear-row {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    gap: 0.75rem;
  }

  .chainring-label {
    min-width: 70px;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--gc-accent);
  }

  .bar-container {
    flex-grow: 1;
    height: 32px;
    background: var(--bg-surface, #fff);
    border-radius: 6px;
    position: relative;
    border: 1px solid var(--border-color, #e5e7eb);
    overflow: hidden;
  }

  .gear-bar {
    position: absolute;
    height: 100%;
    background: linear-gradient(
      to right,
      var(--gc-primary),
      var(--gc-secondary)
    );
    opacity: 0.8;
    border-radius: 6px;
    transition: all 0.4s ease;
  }

  .cog-marker {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    color: var(--gc-primary);
    font-size: 0.65rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 8px rgba(14, 165, 233, 0.4);
    z-index: 2;
    border: 2px solid var(--gc-primary);
  }

  .cog-marker.crossed {
    background: var(--gc-sprint);
    color: white;
    border-color: var(--gc-sprint);
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.5);
  }

  .table-section {
    margin-bottom: 1.5rem;
  }

  .table-legend {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    flex-wrap: wrap;
  }

  .legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
  }

  .legend-box {
    width: 16px;
    height: 16px;
    border-radius: 3px;
  }

  .legend-box.extreme {
    background: var(--gc-sprint);
  }

  .table-wrapper {
    margin-bottom: 1.5rem;
  }

  .table-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--gc-accent);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  .gear-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 2px;
    font-size: 0.8rem;
    background: var(--bg-page, #f9fafb);
    border-radius: 8px;
    overflow: hidden;
  }

  .gear-table th,
  .gear-table td {
    padding: 0.5rem;
    text-align: center;
    font-weight: 500;
  }

  .gear-table th {
    background: var(--gc-primary);
    color: white;
    font-weight: 700;
  }

  .gear-table .header-chainring {
    background: var(--gc-accent);
    color: white;
  }

  .gear-cell {
    color: var(--text-base, #1f2937);
    transition: all 0.2s ease;
    border-radius: 4px;
  }

  .gear-cell.extreme {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--text-base, #1f2937);
    font-weight: 600;
  }

  .gear-cell .km-h {
    display: block;
    font-size: 0.75rem;
    line-height: 1.3;
  }

  .card-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color, #e5e7eb);
    flex-wrap: wrap;
  }

  .btn-action {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .btn-action.primary {
    background: linear-gradient(135deg, var(--gc-primary), var(--gc-accent));
    color: white;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
  }

  .btn-action.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(14, 165, 233, 0.4);
  }

  .btn-action.primary.success {
    background: linear-gradient(135deg, #10b981, #059669);
  }

  .btn-action.secondary {
    background: var(--bg-page, #f9fafb);
    border: 2px solid var(--gc-accent);
    color: var(--gc-accent);
  }

  .btn-action.secondary:hover {
    background: var(--gc-glass-bg);
    border-color: var(--gc-accent);
  }

  @media (max-width: 768px) {
    .cadence-glass {
      margin: 1rem;
      padding: 1.5rem 1rem;
    }

    .cadence-value {
      font-size: 2.8rem;
    }

    .control-grid {
      grid-template-columns: 1fr;
      gap: 1rem;
    }

    .block-config,
    .block-results {
      padding: 1rem;
    }

    .mode-toggle-bar {
      padding: 0.5rem;
    }

    .mode-buttons {
      max-width: 100%;
    }

    .card-actions {
      flex-direction: column;
      gap: 0.75rem;
    }

    .btn-action {
      width: 100%;
      justify-content: center;
    }

    .gear-table {
      font-size: 0.7rem;
    }

    .gear-table th,
    .gear-table td {
      padding: 0.4rem 0.25rem;
    }

    .zone-bar {
      height: 20px;
    }

    .zone-segment {
      font-size: 0.6rem;
    }

    .gc-slider::-webkit-slider-thumb {
      width: 28px;
      height: 28px;
    }
  }

  @media print {
    .preview-toolbar,
    .mode-toggle-bar,
    .sidebar-area,
    .block-cadence,
    .block-config,
    .card-actions,
    .tag-add,
    .preset-select,
    .advanced-toggle {
      display: none;
    }

    body {
      background: white;
      color: black;
    }

    .page-wrapper {
      display: block;
      margin: 0;
      padding: 0;
    }

    main {
      margin: 0;
      padding: 0;
    }

    .gear-calculator-wrapper {
      padding: 0;
    }

    .gear-main-card {
      border: none;
      box-shadow: none;
      max-width: 100%;
      margin: 0;
      background: white;
    }

    .block-results {
      background: transparent;
      padding: 0;
    }

    .table-wrapper {
      break-inside: avoid;
      margin-bottom: 2rem;
    }

    .gear-table {
      border: 1px solid var(--border-color, #e5e7eb);
      font-size: 0.75rem;
      width: 100%;
      background: white;
    }

    .gear-table th {
      background: var(--bg-page, #f9fafb);
      color: var(--text-main, #1f2937);
      -webkit-print-color-adjust: exact;
      print-color-adjust: exact;
    }

    .gear-cell.extreme {
      background: rgba(239, 68, 68, 0.1);
      border: 1px solid rgba(239, 68, 68, 0.2);
      -webkit-print-color-adjust: exact;
      print-color-adjust: exact;
    }

    .overlap-chart {
      background: transparent;
      break-inside: avoid;
      margin-bottom: 3rem;
      padding: 0;
    }

    .gear-bar {
      -webkit-print-color-adjust: exact;
      print-color-adjust: exact;
      opacity: 1;
    }

    .cog-marker {
      background: white;
      border: 1px solid var(--border-color, #e5e7eb);
      color: var(--gc-accent);
      -webkit-print-color-adjust: exact;
      print-color-adjust: exact;
    }

    .cog-marker.crossed {
      background: var(--gc-sprint);
      border: none;
      color: white;
    }

    .section-subtitle {
      break-after: avoid;
      color: var(--gc-accent);
    }
  }