.yt-input-row {
      display: flex;
      gap: 10px;
      margin-bottom: 24px;
    }
    .yt-input-row input {
      flex: 1;
      padding: 12px 16px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-family: var(--font-body);
      font-size: 0.95rem;
      color: var(--color-text);
      background: var(--color-surface);
      outline: none;
      transition: border-color 150ms ease, box-shadow 150ms ease;
    }
    .yt-input-row input:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 3px var(--color-primary-light);
    }
    .yt-input-row input::placeholder {
      color: var(--color-text-muted);
    }

    .yt-action-row {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    .yt-error {
      padding: 12px 16px;
      margin-bottom: 20px;
      border-radius: var(--radius-sm);
      background: #fef2f2;
      border: 1px solid #fecaca;
      color: #dc2626;
      font-size: 0.88rem;
      font-weight: 500;
      display: none;
    }
    .yt-error.show { display: block; }

    .yt-video-id-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 16px;
      margin-bottom: 24px;
      border-radius: 100px;
      background: var(--color-primary-light);
      border: 1px solid var(--color-primary-subtle);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--color-primary);
    }
    .yt-video-id-badge span {
      font-family: var(--font-mono);
      font-weight: 700;
    }

    .thumb-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 8px;
    }

    .thumb-card {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: var(--color-surface);
      transition: box-shadow 150ms ease;
    }
    .thumb-card:hover {
      box-shadow: var(--shadow-md);
    }

    .thumb-card img {
      width: 100%;
      height: auto;
      display: block;
      background: var(--color-bg);
      min-height: 80px;
    }

    .thumb-card-body {
      padding: 14px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      flex-wrap: wrap;
    }

    .thumb-res-label {
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--color-text);
    }
    .thumb-res-label small {
      font-weight: 500;
      color: var(--color-text-muted);
      margin-left: 4px;
    }

    .thumb-badge {
      display: inline-block;
      padding: 3px 10px;
      border-radius: 100px;
      font-size: 0.7rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.04em;
      background: var(--color-primary-light);
      color: var(--color-primary);
      border: 1px solid var(--color-primary-subtle);
    }

    .thumb-card-body .btn {
      font-size: 0.82rem;
      padding: 7px 16px;
    }
    .thumb-card-body .thumb-btns {
      display: flex;
      gap: 6px;
    }

    .download-all-row {
      display: flex;
      justify-content: flex-end;
      margin-bottom: 16px;
    }

    .thumb-results {
      display: none;
    }
    .thumb-results.show {
      display: block;
    }

    .toast-msg {
      position: fixed;
      bottom: 24px;
      right: 24px;
      padding: 12px 20px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 600;
      color: white;
      background: var(--color-text);
      box-shadow: var(--shadow-lg);
      z-index: 999;
      opacity: 0;
      transform: translateY(12px);
      transition: all 250ms ease;
      pointer-events: none;
    }
    .toast-msg.show { opacity: 1; transform: translateY(0); }

    @media (max-width: 768px) {
      .thumb-grid { grid-template-columns: 1fr; }
      .yt-input-row { flex-direction: column; }
      .yt-input-row .btn { width: 100%; }
      .yt-action-row { flex-direction: column; }
      .yt-action-row .btn { width: 100%; }
    }