.file-input-container { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
            .file-input-container input[type="file"] { padding: 10px; border-radius: 8px; border: 1px solid #cbd5e1; font-size: 0.9rem; background: #fff; cursor: pointer; }
            
            .preview-area { display: flex; flex-direction: column; align-items: center; gap: 15px; margin-bottom: 20px; }
            video { width: 100%; max-height: 300px; background: #0f172a; border-radius: 8px; object-fit: contain; }
            canvas { display: none; }

            .controls-grid { display: grid; grid-template-columns: 1fr auto; gap: 10px; margin-bottom: 20px; align-items: center; }
            .controls-grid input[type="range"] { width: 100%; accent-color: var(--primary); }
            .time-display { font-family: monospace; font-weight: 600; color: #334155; font-size: 0.95rem; }

            .result-preview { display: flex; flex-direction: column; align-items: center; gap: 10px; margin-bottom: 20px; background: #f8fafc; padding: 15px; border-radius: 8px; border: 1px dashed #cbd5e1; }
            .result-preview img { max-width: 100%; max-height: 200px; border-radius: 6px; box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1); }

            .btn { width: 100%; 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; text-decoration: none; }
            .btn-primary { background-color: var(--primary); color: white; }
            .btn-primary:hover { background-color: var(--primary-hover); }
            .btn-success { background-color: #16a34a; color: white; }
            .btn-success:hover { background-color: #15803d; }
            .btn:disabled { background-color: #cbd5e1; cursor: not-allowed; }