/* Card Base Styles */
        .session-card {
            background: #ffffff;
            border-radius: 12px;
            border: none;
            box-shadow: 0 1px 8px rgba(0,0,0,0.06);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            overflow: hidden;
            margin-bottom: 1.5rem;
            position: relative;
        }

        .session-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 24px rgba(0,0,0,0.1);
        }

        .session-card.completed {
            border-left: 4px solid #28a745;
        }

        .session-card.in-progress {
            border-left: 4px solid #f39c12;
        }

        .session-card.not-started {
            border-left: 4px solid #e9ecef;
        }

        /* Card Zoom - Rojo */
        .card-zoom .card-header-content {
            padding: 1.25rem;
            background: white;
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
        }

        .card-zoom .session-time {
            color: #C04140;
        }

        /* Card Grabado - Azul */
        .card-recorded .card-header-content {
            padding: 1.25rem;
            cursor: pointer;
            background: white;
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
        }

        .card-recorded .session-time {
            color: #3b6cb0;
        }

        /* Status Badge */
        .status-wrapper {
            display: flex;
            justify-content: flex-end;
            margin-bottom: 0.25rem;
            order: -1;
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.25rem 0.6rem;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            width: fit-content;
        }

        .status-badge.not-started {
            background-color: #e9ecef;
            color: #6c757d;
        }

        .status-badge.in-progress {
            background-color: #fff3cd;
            color: #856404;
            border: 1px solid #ffeaa7;
        }

        .status-badge.completed {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }

        /* Tipografía Compacta */
        .session-number {
            color: #2c3e50;
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .session-meta {
            display: flex;
            flex-direction: column;
            gap: 0.15rem;
        }

        .session-label {
            color: #6c757d;
            font-size: 0.7rem;
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            margin-bottom: 0.1rem;
        }

        .session-date {
            color: #2c3e50;
            font-size: 0.9rem;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .session-time {
            font-weight: 500;
            font-size: 0.85rem;
            margin-top: 0.15rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            opacity: 0.9;
        }

        /* Botón Grabado - Azul */
        .btn-toggle {
            background-color: #3b6cb0;
            color: white;
            border: none;
            border-radius: 6px;
            padding: 0.6rem 1rem;
            font-weight: 500;
            font-size: 0.85rem;
            width: 100%;
            margin-top: 1rem;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
        }

        .btn-toggle:hover {
            background-color: #2d5590;
            transform: translateY(-1px);
            color: white;
        }

        .btn-toggle i {
            transition: transform 0.3s;
            font-size: 0.8rem;
        }

        .btn-toggle[aria-expanded="true"] i {
            transform: rotate(180deg);
        }

        /* Botón Zoom - Rojo */
        .btn-zoom {
            background-color: #C04140;
            color: white;
            border: none;
            border-radius: 6px;
            padding: 0.6rem 1rem;
            font-weight: 500;
            font-size: 0.85rem;
            width: 100%;
            margin-top: 1rem;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            text-decoration: none;
        }

        .btn-zoom:hover {
            background-color: #A03535;
            transform: translateY(-1px);
            color: white;
            text-decoration: none;
        }

        /* Collapsible Content */
        .session-content {
            background-color: #fafbfc;
            border-top: 1px solid #e9ecef;
        }

        .content-wrapper {
            padding: 1.25rem;
        }

        /* Video Container */
        .video-wrapper {
            position: relative;
            background: #000;
            border-radius: 8px;
            overflow: hidden;
        }

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

        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
        }

        /* Botón Fullscreen */
        .btn-fullscreen {
            width: 100%;
            padding: 0.75rem;
            background: rgba(0, 0, 0, 0.85);
            color: rgba(255, 255, 255, 0.9);
            border: none;
            font-size: 0.85rem;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            transition: all 0.2s;
            backdrop-filter: blur(4px);
        }

        .btn-fullscreen:hover {
            background: rgba(0, 0, 0, 0.95);
            color: white;
        }

        .video-loading {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #1a1a1a;
            color: rgba(255,255,255,0.8);
            gap: 0.5rem;
            font-size: 0.9rem;
            font-weight: 400;
        }

        /* Progress Section - Azul para grabados */
        .progress-section {
            margin-top: 1.25rem;
            background: white;
            padding: 1rem;
            border-radius: 8px;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }

        .progress-label {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: #2c3e50;
            font-size: 0.85rem;
        }

        .progress {
            height: 8px;
            background-color: #e9ecef;
            border-radius: 4px;
            overflow: hidden;
        }

        .progress-bar {
            background: linear-gradient(90deg, #3b6cb0 0%, #4a90e2 100%);
            transition: width 0.3s ease;
        }

        .progress-bar.completed {
            background: #28a745;
        }

        /* Resources Section */
        .resources-section {
            margin-top: 1rem;
            padding: 1rem;
            background: white;
            border-radius: 8px;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }

        .resources-title {
            font-weight: 600;
            color: #2c3e50;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.9rem;
        }

        .resource-item {
            display: flex;
            align-items: center;
            padding: 0.6rem;
            background: #f5f7fa;
            border-radius: 6px;
            margin-bottom: 0.4rem;
            text-decoration: none;
            color: #2c3e50;
            transition: all 0.2s;
            font-size: 0.85rem;
        }

        .resource-item:hover {
            background: #e9ecef;
            text-decoration: none;
            color: #3b6cb0;
            transform: translateX(3px);
        }

        .resource-item i {
            color: #3b6cb0;
            margin-right: 0.6rem;
            font-size: 0.9rem;
            width: 16px;
            text-align: center;
        }

        /* Manual Complete Button */
        .btn-complete {
            margin-top: 0.75rem;
            padding: 0.4rem 0.8rem;
            border: 1.5px solid #28a745;
            color: #28a745;
            background: transparent;
            border-radius: 4px;
            font-weight: 500;
            font-size: 0.8rem;
            cursor: pointer;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .btn-complete:hover {
            background: #28a745;
            color: white;
        }

        .btn-complete.active {
            background: #28a745;
            color: white;
        }

        .last-watched {
            font-size: 0.75rem;
            color: #6c757d;
            margin-top: 0.4rem;
            font-style: italic;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .session-number {
                font-size: 1rem;
            }
            
            .session-date {
                font-size: 0.85rem;
            }
        }

        /* Animations */
        .collapse.show {
            animation: slideDown 0.25s ease-out;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }