:root {
            --primary: #6a5acd;
            --primary-dark: #483d8b;
            --secondary: #9370db;
            --success: #28a745;
            --info: #17a2b8;
            --warning: #ffc107;
            --danger: #dc3545;
            --light: #f8f9fa;
            --dark: #343a40;
            --gray: #6c757d;
            --gray-light: #e9ecef;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        header {
            background-color: var(--primary);
            color: white;
            padding: 15px 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 24px;
            font-weight: bold;
            display: flex;
            align-items: center;
        }

        .logo i {
            margin-right: 10px;
        }

        /* Upload area */
        .upload-area {
            border: 2px dashed #aaa;
            border-radius: 8px;
            padding: 25px;
            text-align: center;
            cursor: pointer;
            transition: all 0.2s ease;
            margin-bottom: 20px;
            background-color: #fafafa;
        }

        .upload-area:hover {
            border-color: var(--primary);
            background-color: rgba(106, 90, 205, 0.05);
        }

        .upload-area i {
            font-size: 40px;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .upload-area h3 {
            margin-bottom: 8px;
            color: var(--primary);
            font-size: 18px;
        }

        .upload-area p {
            color: var(--gray);
            font-size: 14px;
            margin-bottom: 5px;
        }

        /* Formularios */
        .form-group {
            margin-bottom: 15px;
        }

        label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
            font-size: 14px;
        }

        input[type="file"] {
            display: none;
        }

        select, input[type="text"], input[type="number"], input[type="range"], textarea {
            width: 100%;
            padding: 8px 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
            transition: border 0.2s;
        }

        select:focus, input:focus, textarea:focus {
            border-color: var(--primary);
            outline: none;
        }

        /* Botones */
        .btn {
            display: inline-block;
            padding: 10px 18px;
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
            transition: all 0.2s ease;
            text-align: center;
            font-weight: 500;
        }

        .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .btn i {
            margin-right: 8px;
            font-size: 14px;
        }

        .btn-primary {
            background-color: var(--primary);
        }

        .btn-success {
            background-color: var(--success);
        }

        .btn-info {
            background-color: var(--info);
        }

        .btn-warning {
            background-color: var(--warning);
            color: #333;
        }

        .btn-danger {
            background-color: var(--danger);
        }

        .btn-secondary {
            background-color: var(--gray);
        }

        .btn-sm {
            padding: 6px 12px;
            font-size: 13px;
        }

        .btn:disabled {
            background-color: var(--gray-light);
            color: var(--gray);
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .action-buttons {
            display: flex;
            gap: 10px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        /* Video preview */
        .video-preview-wrapper {
            margin-bottom: 20px;
        }

        .video-container {
            position: relative;
            padding-bottom: 56.25%;
            height: 0;
            overflow: hidden;
            background-color: #000;
            border-radius: 6px;
        }

        .video-container video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }

        .video-info {
            margin-top: 10px;
            font-size: 14px;
            color: var(--gray);
            display: flex;
            justify-content: space-between;
        }

        .video-filename {
            font-weight: 500;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 70%;
        }

        /* Timeline editor */
        .timeline-editor {
            margin: 30px 0;
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .timeline-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }

        .timeline-controls {
            display: flex;
            gap: 10px;
        }

        .timeline-container {
            position: relative;
            height: 80px;
            background-color: #f0f0f0;
            border-radius: 4px;
            overflow: hidden;
            margin-bottom: 10px;
        }

        .timeline {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            cursor: pointer;
        }

        .timeline-progress {
            position: absolute;
            top: 0;
            bottom: 0;
            left: 0;
            right: 100%;
            background-color: rgba(106, 90, 205, 0.3);
            pointer-events: none;
        }

        .timeline-handle {
            position: absolute;
            top: 0;
            bottom: 0;
            width: 4px;
            background-color: var(--primary);
            cursor: ew-resize;
            z-index: 2;
        }

        .timeline-handle.start {
            left: 0;
        }

        .timeline-handle.end {
            right: 0;
        }

        .time-display {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--gray);
        }

        .time-inputs {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 15px;
        }

        /* Modales */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.7);
            z-index: 1000;
            justify-content: center;
            align-items: center;
            animation: fadeIn 0.3s ease;
        }

        .modal-content {
            background-color: white;
            border-radius: 8px;
            width: 90%;
            max-width: 500px;
            max-height: 90vh;
            overflow-y: auto;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
            animation: slideUp 0.3s ease;
        }

        .modal-header {
            padding: 15px 20px;
            border-bottom: 1px solid #eee;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .modal-header h3 {
            color: var(--primary);
            font-size: 18px;
        }

        .modal-body {
            padding: 20px;
        }

        .modal-footer {
            padding: 15px 20px;
            border-top: 1px solid #eee;
            display: flex;
            justify-content: flex-end;
            gap: 10px;
        }

        .close-modal {
            background: none;
            border: none;
            font-size: 20px;
            cursor: pointer;
            color: var(--gray);
        }

        /* Estados de carga */
        .loading-state {
            text-align: center;
            padding: 20px;
        }

        .loading-state i {
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .progress-container {
            width: 100%;
            background-color: #e9ecef;
            border-radius: 4px;
            height: 16px;
            margin: 15px 0;
            position: relative;
            overflow: hidden;
        }

        .progress-bar {
            background-color: var(--primary);
            height: 100%;
            border-radius: 4px;
            width: 0;
            transition: width 0.3s ease;
        }

        .progress-text {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-size: 11px;
            font-weight: bold;
        }

        /* Resultados */
        .result-container {
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            margin-top: 20px;
        }

        /* Animaciones */
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes slideUp {
            from { transform: translateY(20px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .time-inputs {
                grid-template-columns: 1fr;
            }
            
            .action-buttons {
                flex-direction: column;
            }
            
            .btn {
                width: 100%;
            }
        }

        /* Tooltips */
        .tooltip {
            position: relative;
            display: inline-block;
            cursor: help;
        }

        .tooltip .tooltiptext {
            visibility: hidden;
            width: 200px;
            background-color: #333;
            color: #fff;
            text-align: center;
            border-radius: 6px;
            padding: 8px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 13px;
            font-weight: normal;
        }

        .tooltip:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }

        .hidden {
            display: none;
        }