.checkerboard {
      background-image: linear-gradient(45deg, #1a1a1a 25%, transparent 25%),
                        linear-gradient(-45deg, #1a1a1a 25%, transparent 25%),
                        linear-gradient(45deg, transparent 75%, #1a1a1a 75%),
                        linear-gradient(-45deg, transparent 75%, #1a1a1a 75%);
      background-size: 20px 20px;
      background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    }

    .drop-zone {
      width: 100%;
      border: 2px dashed var(--border-color);
      border-radius: 2px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all var(--transition-medium);
      position: relative;
      padding: 16px;
    }

    .drop-zone:hover {
      border-color: var(--accent);
      background: var(--accent-glow);
    }

    .drop-zone input {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      opacity: 0;
      cursor: pointer;
    }

    .drop-zone-text {
      text-align: center;
      pointer-events: none;
    }

    .drop-zone.has-video .drop-zone-text {
      display: none;
    }

    .drop-zone.has-video.drag-over .drop-zone-text {
      display: block;
    }

    .drop-zone-text svg {
      width: 32px;
      height: 32px;
      margin: 0 auto 16px;
      color: var(--text-muted);
    }

    .drop-zone-text p {
      font-family: var(--font-mono);
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 4px;
    }

    .drop-zone-text span {
      font-family: var(--font-mono);
      font-size: 13px;
      color: var(--text-muted);
      opacity: 0.6;
    }

    .drop-zone-preview {
      display: none;
      width: 100%;
      height: auto;
    }

    .drop-zone-preview.show {
      display: block;
    }

    .results-section {
      border: var(--border-medium);
      border-radius: 2px;
      padding: 24px;
      margin-top: 32px;
    }

    .results-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: var(--border-thin);
    }

    .results-header svg {
      width: 24px;
      height: 24px;
      color: var(--accent);
    }

    .results-header h3 {
      font-family: var(--font-display);
      font-size: 20px;
      text-transform: uppercase;
    }

    @media (max-width: 768px) {
      .drop-zone-preview {
        max-width: 100%;
      }
    }

    .error-overlay {
      position: fixed;
      top: 60px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--bg-surface);
      border: var(--border-thin);
      border-radius: 2px;
      padding: 8px 16px;
      color: var(--text-primary);
      font-family: var(--font-mono);
      font-size: 14px;
      z-index: 1000;
      box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--border-color);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .error-overlay:not(.hidden) {
      opacity: 1;
    }

    .error-overlay.hidden {
      opacity: 0;
    }

    @media (max-width: 480px) {
      .card-brutal {
        padding: 16px !important;
      }

      .section-title {
        font-size: 16px !important;
        margin-bottom: 16px !important;
      }
    }

    .frames-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
      gap: 16px;
      width: 100%;
    }

    .frame-card {
      position: relative;
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: all 0.2s;
    }

    .frame-card:hover {
      border-color: var(--accent);
    }

    .frame-card.selected {
      border-color: var(--accent);
      box-shadow: 0 0 0 2px var(--accent);
    }

    .frame-card img {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
      display: block;
    }

    .frame-checkbox {
      position: absolute;
      top: 8px;
      left: 8px;
      width: 20px;
      height: 20px;
      cursor: pointer;
      accent-color: var(--accent);
    }

    .frame-delete {
      position: absolute;
      top: 8px;
      right: 8px;
      width: 28px;
      height: 28px;
      padding: 0;
      background: var(--bg-primary);
      border: 1px solid var(--border-color);
      border-radius: 2px;
      cursor: pointer;
      opacity: 0;
      transition: opacity 0.2s;
      font-size: 18px;
      line-height: 1;
      color: var(--text-primary);
    }

    .frame-card:hover .frame-delete {
      opacity: 1;
    }

    .frame-delete:hover {
      background: var(--accent);
      color: var(--bg-primary);
    }

    .bulk-actions {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 12px 16px;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      margin-bottom: 16px;
      flex-wrap: wrap;
    }

    .bulk-actions .select-all {
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      font-family: var(--font-mono);
      font-size: 14px;
    }

    .bulk-actions .select-all input {
      width: 16px;
      height: 16px;
      accent-color: var(--accent);
    }

    .bulk-actions #selected-count {
      font-family: var(--font-mono);
      font-size: 14px;
      color: var(--text-muted);
    }

    .frame-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.9);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
    }

    .frame-overlay:not(.hidden) {
      display: flex;
    }

    .overlay-content {
      width: 90vw;
      max-height: 90vh;
      display: flex;
      flex-direction: column;
      gap: 16px;
      align-items: center;
    }

    .overlay-content img {
      max-width: 100%;
      max-height: 80vh;
      object-fit: contain;
    }

    .overlay-nav {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(0, 0, 0, 0.5);
      border: 1px solid var(--accent);
      color: white;
      font-size: 24px;
      padding: 12px 16px;
      cursor: pointer;
      transition: all 0.2s;
    }

    .overlay-nav:hover:not(:disabled) {
      background: var(--accent);
      color: var(--bg-primary);
    }

    .overlay-nav:disabled {
      opacity: 0.3;
      cursor: not-allowed;
    }

    .overlay-nav--left {
      left: 20px;
    }

    .overlay-nav--right {
      right: 20px;
    }

    .overlay-close {
      position: absolute;
      top: 16px;
      right: 16px;
      font-size: 32px;
      background: none;
      border: none;
      color: white;
      cursor: pointer;
      padding: 8px;
      line-height: 1;
    }

    .overlay-close:hover {
      color: var(--accent);
    }

    .overlay-actions {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .overlay-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 24px;
      background: transparent;
      color: var(--text-primary);
      font-family: var(--font-mono);
      font-weight: 500;
      font-size: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      border: var(--border-medium);
      border-radius: 2px;
      cursor: pointer;
      transition: all var(--transition-fast);
    }

    .overlay-btn:hover {
      background: transparent;
      border-color: var(--accent);
      color: var(--accent);
    }

    .overlay-btn.selected {
      background: var(--accent);
      color: var(--bg-primary);
      border-color: var(--accent);
    }

    .overlay-btn.selected:hover {
      background: var(--accent);
      color: var(--bg-primary);
    }

    .overlay-btn:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    .overlay-btn.selected {
      background: var(--accent);
      color: var(--bg-primary);
      border-color: var(--accent);
    }

    @media (max-width: 480px) {
      .frames-grid {
        grid-template-columns: 1fr;
      }

      .bulk-actions {
        gap: 12px;
      }
    }