.param-slider {
            width: 100%;
        }
        .preview-container {
            background: #f1f5f9;
            border-radius: 16px;
            padding: 1rem;
            text-align: center;
            margin-top: 1.5rem;
        }
        video, canvas, .gif-preview-img {
            max-width: 100%;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .gif-preview-img {
            max-height: 280px;
            object-fit: contain;
        }
        .progress-bar-custom {
            height: 8px;
            border-radius: 10px;
            background: #e2e8f0;
            overflow: hidden;
        }
        .progress-fill {
            width: 0%;
            height: 100%;
            background: var(--primary-color);
            transition: width 0.2s ease;
        }
        .btn-convert {
            background: linear-gradient(135deg, #2c6e9e 0%, #1e4a6e 100%);
            border: none;
            padding: 0.7rem 1.8rem;
            font-weight: 600;
        }
        .privacy-badge {
            background: #e9f5ef;
            border-radius: 40px;
            padding: 0.4rem 1rem;
            display: inline-block;
            font-size: 0.85rem;
        }
        .range-value {
            font-weight: 600;
            color: var(--primary-color);
        }
        .error-message {
            background-color: #fff5f5;
            border-left: 4px solid #e53e3e;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            margin-top: 1rem;
        }
        .drop-zone {
            border: 2px dashed #cbd5e1;
            border-radius: 20px;
            padding: 2rem 1rem;
            text-align: center;
            transition: all 0.2s ease;
            background-color: #fafcff;
            cursor: pointer;
            margin-bottom: 1rem;
        }
        .drop-zone.drag-over {
            border-color: var(--primary-color);
            background-color: #eef4ff;
            transform: scale(0.99);
        }
        .drop-zone i {
            font-size: 2.5rem;
            color: #94a3b8;
            margin-bottom: 0.5rem;
        }
        .drop-zone p {
            margin-bottom: 0.5rem;
            color: #475569;
        }
        .file-input-label {
            display: none;
            background: var(--primary-color);
            color: white;
            padding: 0.4rem 1rem;
            border-radius: 40px;
            font-size: 0.9rem;
            cursor: pointer;
            margin-top: 0.5rem;
            transition: background 0.2s;
        }
        .file-input-label:hover {
            background: var(--accent-color);
        }
        #videoInput {
            display: none;
        }