/* ============================================
   CAMPUS VIRTUAL - ENHANCED DESIGN
   Versión: 2.0 - Modern & Beautiful
   Fecha: 2025-11-14
   Diseño Premium con animaciones y efectos avanzados
============================================ */

/* ==========================================
   VARIABLES Y TEMA
========================================== */
:root {
    /* Paleta de Colores Principal */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --info-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    
    /* Colores de Acento */
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --primary-light: #7c8cef;
    --secondary-color: #764ba2;
    
    /* Colores Neutros */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fc;
    --bg-tertiary: #f1f3f9;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --border-light: #edf2f7;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.16);
    --shadow-colored: 0 8px 24px rgba(102, 126, 234, 0.25);
    
    /* Espaciado */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Bordes */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==========================================
   DROP ZONE - UPLOAD DE ARCHIVOS
========================================== */
.drop-zone {
    position: relative;
    border: 3px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
    background: var(--bg-secondary);
    cursor: pointer;
    overflow: hidden;
}

.drop-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 0;
}

.drop-zone:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-colored);
}

.drop-zone:hover::before {
    opacity: 0.05;
}

.drop-zone.drag-over {
    border-color: #10b981;
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    transform: scale(1.02);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.drop-zone-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.drop-zone-content i {
    font-size: 48px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.file-preview {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 2px solid #0284c7;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* ==========================================
   CURSO CARD - DISEÑO PREMIUM
========================================== */
.curso-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
    position: relative;
}

.curso-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.curso-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: transparent;
}

.curso-card:hover::before {
    transform: scaleX(1);
}

.curso-header {
    padding: var(--spacing-xl) var(--spacing-lg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #fafbff 0%, #f8f9fc 100%);
    border-bottom: 2px solid var(--border-light);
    transition: all var(--transition-fast);
    position: relative;
}

.curso-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.curso-header:hover {
    background: linear-gradient(135deg, #ffffff 0%, #fafbff 100%);
}

.curso-header:hover::after {
    transform: scaleX(1);
}

.curso-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 22px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    letter-spacing: -0.5px;
}

.curso-header h3 i {
    font-size: 28px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.curso-header i.fa-chevron-down {
    transition: transform var(--transition-base);
    color: var(--primary-color);
    font-size: 22px;
    padding: var(--spacing-sm);
    background: rgba(102, 126, 234, 0.1);
    border-radius: var(--radius-full);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.curso-header i.fa-chevron-down.rotated {
    transform: rotate(180deg);
    background: var(--primary-gradient);
    color: white;
}

.curso-content {
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   MÓDULO ITEM - DISEÑO MEJORADO
========================================== */
.modulo-item {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid transparent;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.modulo-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-gradient);
    transition: width var(--transition-base);
}

.modulo-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.modulo-item:hover::before {
    width: 6px;
}

.modulo-header h4 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    letter-spacing: -0.3px;
}

.modulo-numero {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 800;
    font-size: 20px;
    margin-right: var(--spacing-md);
    box-shadow: var(--shadow-colored);
    position: relative;
    overflow: hidden;
}

.modulo-numero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 100%);
}

.modulo-descripcion {
    color: var(--text-secondary);
    font-size: 15px;
    margin: var(--spacing-md) 0 0 0;
    line-height: 1.6;
}

/* ==========================================
   MATERIALES - DISEÑO MODERNO
========================================== */
.materiales-list {
    margin-top: var(--spacing-lg);
    display: grid;
    gap: var(--spacing-md);
}

.material-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.material-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-gradient);
    transform: scaleY(0);
    transition: transform var(--transition-base);
}

.material-item:hover {
    background: var(--bg-primary);
    border-color: var(--primary-color);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.material-item:hover::before {
    transform: scaleY(1);
}

.material-info {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
    flex: 1;
}

.material-info > i {
    font-size: 36px;
    margin-top: var(--spacing-xs);
    transition: transform var(--transition-base);
}

.material-item:hover .material-info > i {
    transform: scale(1.1);
}

/* Iconos de Material con colores específicos */
.material-info > .fa-file-pdf {
    color: #ef4444;
}

.material-info > .fa-file-video {
    background: linear-gradient(135deg, #8b5cf6 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.material-info > .fa-file-powerpoint {
    color: #f97316;
}

.material-info > .fa-file-word {
    color: #3b82f6;
}

.material-info > .fa-file-excel {
    color: #10b981;
}

.material-info > .fa-file {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.material-info strong {
    display: block;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.2px;
}

.material-descripcion {
    color: var(--text-secondary);
    font-size: 14px;
    margin: var(--spacing-xs) 0;
    line-height: 1.5;
}

.material-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    font-size: 13px;
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
}

.material-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 4px 10px;
    background: rgba(102, 126, 234, 0.08);
    border-radius: var(--radius-sm);
}

.material-meta span i {
    font-size: 12px;
    color: var(--primary-color);
}

.material-acciones {
    display: flex;
    gap: var(--spacing-sm);
}

.material-acciones .btn {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    font-size: 16px;
}

.material-acciones .btn-primary {
    background: var(--primary-gradient);
    border: none;
    box-shadow: var(--shadow-sm);
}

.material-acciones .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-colored);
}

.material-acciones .btn-secondary {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    border: none;
    box-shadow: var(--shadow-sm);
}

.material-acciones .btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 87, 108, 0.25);
}

/* ==========================================
   EMPTY STATE - DISEÑO ATRACTIVO
========================================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    color: var(--text-muted);
    background: linear-gradient(135deg, #fafbff 0%, #f8f9fc 100%);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--border-color);
}

.empty-state i {
    font-size: 80px;
    background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-lg);
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

.empty-state p {
    font-size: 17px;
    margin: var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-weight: 500;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* ==========================================
   VIDEO CONTAINER - DISEÑO PREMIUM
========================================== */
.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.video-container::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    padding: 2px;
    background: var(--primary-gradient);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    z-index: 1;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
}

/* ==========================================
   BADGES PERSONALIZADOS
========================================== */
.badge-pdf {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.badge-video {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.badge-ppt {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: white;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

/* ==========================================
   PROGRESS BAR - DISEÑO MODERNO
========================================== */
.progress-bar-campus {
    width: 100%;
    height: 10px;
    background: var(--border-light);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-top: var(--spacing-md);
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.06);
}

.progress-bar-campus-fill {
    height: 100%;
    background: var(--success-gradient);
    transition: width var(--transition-slow);
    border-radius: var(--radius-full);
    position: relative;
    overflow: hidden;
}

.progress-bar-campus-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* ==========================================
   TABS - DISEÑO PREMIUM
========================================== */
.campus-tabs,
.tabs-container {
    display: flex;
    gap: var(--spacing-xs);
    border-bottom: 2px solid var(--border-light);
    margin-bottom: var(--spacing-xl);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.campus-tab,
.tab-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: relative;
    white-space: nowrap;
}

.campus-tab::before,
.tab-btn::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.campus-tab:hover,
.tab-btn:hover {
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
}

.campus-tab.active,
.tab-btn.active {
    color: var(--primary-color);
    font-weight: 700;
}

.campus-tab.active::before,
.tab-btn.active::before {
    transform: scaleX(1);
}

.tab-btn i {
    font-size: 18px;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   LOADING STATE - DISEÑO ATRACTIVO
========================================== */
.loading-campus {
    text-align: center;
    padding: var(--spacing-2xl);
}

.loading-campus i {
    font-size: 64px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(0.95);
    }
}

/* ==========================================
   MATERIALES GRID
========================================== */
.materiales-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.material-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.material-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.material-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    transform: translateY(-4px);
}

.material-card:hover::before {
    transform: scaleX(1);
}

/* ==========================================
   CONTAINERS
========================================== */
.modulos-lista-container,
.materiales-lista-container {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.modulo-materiales-group {
    margin-bottom: var(--spacing-xl);
}

.modulo-materiales-group h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.modulo-materiales-group h4 i {
    font-size: 20px;
}

.campus-cursos-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ==========================================
   ACTION BUTTONS
========================================== */
.campus-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.campus-actions .btn {
    flex: 0 0 auto;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.campus-actions .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================
   TABLAS DE GESTIÓN
========================================== */
#tablaModulosCampus {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

#tablaModulosCampus th {
    background: linear-gradient(135deg, #f8f9fc 0%, #f1f3f9 100%);
    padding: var(--spacing-lg);
    text-align: left;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#tablaModulosCampus td {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

#tablaModulosCampus tbody tr {
    transition: all var(--transition-fast);
}

#tablaModulosCampus tbody tr:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.03) 0%, rgba(118, 75, 162, 0.03) 100%);
}

/* ==========================================
   ANIMACIONES ADICIONALES
========================================== */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ==========================================
   RESPONSIVE DESIGN
========================================== */
@media (max-width: 1024px) {
    .materiales-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 16px;
        --spacing-xl: 24px;
        --spacing-2xl: 32px;
    }
    
    .material-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .material-info {
        width: 100%;
    }
    
    .material-acciones {
        width: 100%;
        justify-content: flex-start;
    }
    
    .material-meta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .curso-header h3 {
        font-size: 18px;
    }
    
    .modulo-numero {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .materiales-grid {
        grid-template-columns: 1fr;
    }
    
    .tabs-container,
    .campus-tabs {
        gap: 0;
    }
    
    .tab-btn,
    .campus-tab {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .curso-content {
        padding: var(--spacing-md);
    }
    
    .modulo-item {
        padding: var(--spacing-md);
    }
    
    .material-item {
        padding: var(--spacing-md);
    }
    
    .drop-zone {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .modulos-lista-container,
    .materiales-lista-container {
        padding: var(--spacing-md);
    }
}

/* ==========================================
   ACCESIBILIDAD
========================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states para accesibilidad */
.curso-header:focus,
.material-item:focus,
.tab-btn:focus,
.campus-tab:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ==========================================
   PRINT STYLES
========================================== */
@media print {
    .material-acciones,
    .campus-actions,
    .drop-zone {
        display: none;
    }
    
    .curso-card,
    .modulo-item,
    .material-item {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}