.drop-zone { border: 2px dashed var(--border-color); border-radius: 8px; padding: 25px 20px; text-align: center; cursor: pointer; transition: border-color 0.2s; background: #f9fafb; margin-bottom: 20px; }
            .drop-zone:hover { border-color: var(--primary); background: #fdfdff; }
            .drop-zone p { font-size: 0.9rem; color: #4b5563; }

            .file-card { display: none; align-items: center; justify-content: space-between; background: #f8fafc; border: 1px solid #e2e8f0; padding: 12px 16px; border-radius: 8px; font-size: 0.9rem; margin-bottom: 20px; }
            .file-info { font-weight: 500; color: #374151; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 380px; }

            .video-preview-container { text-align: center; margin-bottom: 15px; background: #000; border-radius: 8px; overflow: hidden; }
            .video-preview-container video { width: 100%; max-height: 400px; display: block; }

            .options-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; background: #f8fafc; padding: 14px; border-radius: 8px; border: 1px solid #e2e8f0; font-size: 0.9rem; }
            .options-group label { font-weight: 500; color: #374151; }

            .frame-controls { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 15px; }

            .controls { display: flex; gap: 10px; }
            .btn { flex: 1; padding: 12px; border: none; border-radius: 8px; font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: background-color 0.2s; text-align: center; display: flex; align-items: center; justify-content: center; gap: 6px; }
            .btn-primary { background-color: var(--primary); color: white; }
            .btn-primary:hover { background-color: var(--primary-hover); }
            .btn-secondary { background-color: #e5e7eb; color: #374151; }
            .btn-secondary:hover { background-color: #d1d5db; }

            .frame-info-text { font-size: 0.85rem; color: #6b7280; text-align: center; margin-bottom: 15px; }