/* ===== STYLE-2.CSS - DISEÑO MODERNO ===== */
/* Inspirado en dashboards modernos con paleta #8C338A */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ===== VARIABLES CSS ===== */
:root {
    --primary-color: #8C338A;
    --primary-dark: #6B2668;
    --primary-light: #A855A8;
    --contrast-color: #2ECC71;
    --contrast-dark: #27AE60;
    --background: #FFFFFF;
    --surface: #FFFFFF;
    --surface-hover: #F8F9FA;
    --text-primary: #2D3748;
    --text-secondary: #718096;
    --text-muted: #A0AEC0;
    --border: #E2E8F0;
    --border-light: #F7FAFC;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET Y BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
    overflow-x: hidden;
}

/* ===== CONTENEDOR PRINCIPAL ===== */
.container {
    display: flex;
    min-height: 100vh;
    background: var(--background);
}

/* ===== SIDEBAR MODERNO ===== */
.sidebar {
    width: 280px;
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 1000;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

/* ===== LOGO MEJORADO ===== */
.logo {
    padding: 2rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    background: rgba(255, 255, 255, 0.05);
}

.logo a {
    text-decoration: none !important;
    color: white !important;
    display: block;
    transition: all 0.3s ease;
}

.logo a:hover {
    transform: scale(1.05);
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    margin: 0;
    letter-spacing: -0.025em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, #ffffff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Alternativa si no quieres usar h1, directamente el texto del enlace */
.logo a {
    font-size: 1.8rem;
    font-weight: 700;
    text-decoration: none !important;
    color: white !important;
    display: block;
    transition: all 0.3s ease;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, #ffffff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
}

.nav-section {
    padding: 1.5rem 1.5rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 1rem;
}

.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-item {
    margin: 0.25rem 0;
}

.nav-item a {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: 0 25px 25px 0;
    margin-right: 1rem;
    transition: var(--transition);
    font-weight: 500;
}

.nav-item a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateX(4px);
}

.nav-item.active a {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.nav-item i {
    margin-right: 0.75rem;
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

/* ===== CONTENIDO PRINCIPAL ===== */
.main-content {
    flex: 1;
    margin-left: 0;
    padding: 2rem;
    background: var(--background);
    min-height: calc(100vh - 80px);
    transition: margin-left 0.3s ease;
}

/* Espaciado específico para cuando el sidebar está visible */
@media (min-width: 769px) {
    .main-content {
        margin-left: 280px;
    }
}

/* ===== HEADER MODERNO ===== */
.header {
    background: var(--surface);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-title {
    flex: 1;
}

.header-title h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--contrast-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    text-align: right;
}

.user-info .username {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.user-info .role {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.btn-logout {
    padding: 0.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    transition: var(--transition);
}

.btn-logout:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

/* ===== CONTENIDO DE PÁGINAS ===== */
.dashboard-container,
.admin-container,
.teacher-container,
.student-container,
.assignments-container {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-title::before {
    content: '';
    width: 4px;
    height: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--contrast-color));
    border-radius: 2px;
}

/* ===== CARDS MODERNAS ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--contrast-color));
}

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

.card-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
    margin-bottom: 0.5rem;
}

.card-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.card-footer {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.stat-detail {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stat-detail i {
    color: var(--contrast-color);
}

/* ===== BOTONES MODERNOS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
    background: var(--text-primary);
    transform: translateY(-2px);
}

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

.btn-success:hover {
    background: var(--contrast-dark);
    transform: translateY(-2px);
}

.btn-danger {
    background: #E53E3E;
    color: white;
}

.btn-danger:hover {
    background: #C53030;
    transform: translateY(-2px);
}

.btn-warning {
    background: #DD6B20;
    color: white;
}

.btn-warning:hover {
    background: #C05621;
    transform: translateY(-2px);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-link {
    background: transparent;
    color: var(--primary-color);
    padding: 0.5rem;
    text-decoration: underline;
}

.btn-link:hover {
    color: var(--primary-dark);
    background: var(--surface-hover);
    text-decoration: none;
}

/* ===== TABLAS MODERNAS ===== */
.table-container {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th {
    background: var(--surface-hover);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
}

.table tr:hover {
    background: var(--surface-hover);
}

.table-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.text-center {
    text-align: center;
}

/* ===== BADGES MODERNOS ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-estudiante {
    background: rgba(46, 204, 113, 0.1);
    color: var(--contrast-dark);
}

.badge-docente {
    background: rgba(140, 51, 138, 0.1);
    color: var(--primary-dark);
}

.badge-admin {
    background: rgba(229, 62, 62, 0.1);
    color: #C53030;
}

/* ===== FORMULARIOS MODERNOS ===== */
.form-container {
    background: var(--surface);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    background: var(--surface);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    background: var(--surface);
    color: var(--text-primary);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(140, 51, 138, 0.1);
}

.form-control:hover {
    border-color: var(--primary-light);
}

.form-help {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.form-inline {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* ===== ALERTAS MODERNAS ===== */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    border-left: 4px solid;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
}

.alert-success {
    background: rgba(46, 204, 113, 0.1);
    color: var(--contrast-dark);
    border-left-color: var(--contrast-color);
}

.alert-error,
.alert-danger {
    background: rgba(229, 62, 62, 0.1);
    color: #C53030;
    border-left-color: #E53E3E;
}

.alert-info {
    background: rgba(140, 51, 138, 0.1);
    color: var(--primary-dark);
    border-left-color: var(--primary-color);
}

.alert::before {
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    font-size: 1.1rem;
}

.alert-success::before {
    content: '\f00c';
    color: var(--contrast-color);
}

.alert-error::before,
.alert-danger::before {
    content: '\f071';
    color: #E53E3E;
}

.alert-info::before {
    content: '\f05a';
    color: var(--primary-color);
}

/* ===== SECCIONES ===== */
.section {
    margin-bottom: 3rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border);
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

/* ===== NAVEGACIÓN DE PESTAÑAS ===== */
.tab-navigation {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border);
}

.tab {
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    font-weight: 500;
    transition: var(--transition);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.tab:hover {
    color: var(--primary-color);
    background: var(--surface-hover);
}

.tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: var(--surface-hover);
}

/* ===== CURSOS Y MATERIALES ===== */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.course-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--contrast-color));
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.course-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
}

.course-code {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    display: inline-block;
    margin-bottom: 1rem;
}

.course-teacher {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.course-stats {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.course-stats span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.course-stats i {
    color: var(--contrast-color);
}

.course-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.course-progress {
    margin: 1rem 0;
}

.progress-bar {
    background: var(--border-light);
    border-radius: 9999px;
    height: 8px;
    overflow: hidden;
    position: relative;
}

.progress {
    background: linear-gradient(90deg, var(--primary-color), var(--contrast-color));
    height: 100%;
    border-radius: 9999px;
    transition: width 0.5s ease;
}

.progress-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: block;
}

/* ===== MATERIALES ===== */
.materials-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.material-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    transition: var(--transition);
}

.material-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.material-card h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
}

.material-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
}

/* ===== TAREAS ===== */
.task-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.task-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.task-form {
    background: var(--surface);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.delete-form,
.update-form {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
}

/* ===== MODALES ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-title {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.close:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

/* ===== ACCIONES RÁPIDAS ===== */
.quick-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

/* ===== RESPONSIVE ===== */
/* Botón hamburguesa */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.menu-toggle:hover {
    background: rgba(140, 51, 138, 0.1);
    color: var(--primary-color);
}

/* Overlay para cerrar el sidebar en móvil */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

@media (max-width: 1024px) {
    .sidebar {
        width: 260px;
    }
    
    .main-content {
        margin-left: 260px;
    }
    
    .cards-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    /* Mostrar botón hamburguesa */
    .menu-toggle {
        display: block;
    }
    
    .sidebar {
        width: 280px;
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 999;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
    }
    
    .header {
        padding: 1rem;
        display: flex;
        align-items: center;
        gap: 1rem;
    }
    
    .header-title {
        flex: 1;
    }
    
    .header-title h1 {
        font-size: 1.25rem;
        margin: 0;
    }
    
    .dashboard-container,
    .admin-container,
    .teacher-container,
    .student-container,
    .assignments-container {
        padding: 1.5rem 1rem;
        margin-top: 1rem;
    }
    
    .page-title {
        margin-bottom: 1.5rem;
        padding-left: 0.5rem;
    }
    
    .course-actions {
        margin-top: 1.5rem;
        padding-left: 0.5rem;
    }
    
    /* Espaciado específico para el mensaje de "no hay materiales" */
    .alert {
        margin: 1rem 0.5rem;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
        padding: 1.5rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .quick-actions {
        flex-direction: column;
    }
    
    .tab-navigation {
        flex-wrap: wrap;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .course-actions,
    .material-actions,
    .table-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.5rem;
    }
    
    .card-value {
        font-size: 2rem;
    }
    
    .modal-content {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.8rem;
    }
    
    .sidebar {
        width: 100%;
    }
    
    .header-title h1 {
        font-size: 1.1rem;
    }
}

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

.card,
.course-card,
.material-card,
.task-card {
    animation: fadeInUp 0.5s ease;
}

/* ===== UTILIDADES ===== */
.text-primary {
    color: var(--text-primary) !important;
}

.text-secondary {
    color: var(--text-secondary) !important;
}

.text-muted {
    color: var(--text-muted) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.bg-surface {
    background-color: var(--surface) !important;
}

.border-primary {
    border-color: var(--primary-color) !important;
}

.rounded {
    border-radius: var(--radius-sm) !important;
}

.shadow {
    box-shadow: var(--shadow) !important;
}

.shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.5rem !important; }
.mb-2 { margin-bottom: 1rem !important; }
.mb-3 { margin-bottom: 1.5rem !important; }
.mb-4 { margin-bottom: 2rem !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.5rem !important; }
.mt-2 { margin-top: 1rem !important; }
.mt-3 { margin-top: 1.5rem !important; }
.mt-4 { margin-top: 2rem !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: 0.5rem !important; }
.p-2 { padding: 1rem !important; }
.p-3 { padding: 1.5rem !important; }
.p-4 { padding: 2rem !important; }

.d-flex { display: flex !important; }
.d-block { display: block !important; }
.d-none { display: none !important; }

.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }
.align-center { align-items: center !important; }

.w-full { width: 100% !important; }
.h-full { height: 100% !important; }

/* ===== EFECTOS ESPECIALES ===== */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--contrast-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* ===== SCROLLBAR PERSONALIZADO ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
    transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* ===== ESTADOS DE CARGA ===== */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* ===== ESTILOS DE LOGIN ===== */
/* Contenedor principal del login */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #8B5A96 0%, #A855A7 50%, #9333EA 100%);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.auth-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>') repeat;
    pointer-events: none;
}

/* Tarjeta de autenticación */
.auth-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 25px 50px rgba(139, 90, 150, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 100%;
    max-width: 420px;
    padding: 3rem 2.5rem;
    position: relative;
    z-index: 1;
    animation: slideInUp 0.6s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Logo y título */
.auth-card .logo {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-card .logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #8B5A96, #A855A7, #9333EA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    text-shadow: none;
    letter-spacing: -0.5px;
}

.auth-card .logo p {
    color: #6b7280;
    font-size: 1rem;
    margin: 0.5rem 0 0 0;
    font-weight: 400;
}

/* Campos de formulario */
.auth-card .form-control {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    background: #ffffff;
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
    box-sizing: border-box;
}

.auth-card .form-control:focus {
    outline: none;
    border-color: #A855A7;
    box-shadow: 0 0 0 3px rgba(168, 85, 167, 0.1);
    transform: translateY(-1px);
}

.auth-card .form-control::placeholder {
    color: #9ca3af;
    font-weight: 400;
}

/* Botón principal */
.auth-card .btn-primary {
    width: 100%;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #8B5A96, #A855A7, #9333EA);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
    position: relative;
    overflow: hidden;
}

.auth-card .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(168, 85, 167, 0.4);
    background: linear-gradient(135deg, #9333EA, #A855A7, #8B5A96);
}

.auth-card .btn-primary:active {
    transform: translateY(0);
}

/* Alertas */
.auth-card .alert {
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    font-weight: 500;
    border: none;
}

.auth-card .alert-danger {
    background: linear-gradient(135deg, #fee2e2, #fecaca);
    color: #dc2626;
    border-left: 4px solid #dc2626;
}

.auth-card .alert-success {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #059669;
    border-left: 4px solid #059669;
}

/* Enlaces */
.auth-card .auth-links {
    text-align: center;
    margin-top: 1.5rem;
}

.auth-card .auth-links a {
    color: #A855A7;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.auth-card .auth-links a:hover {
    color: #9333EA;
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 480px) {
    .auth-container {
        padding: 1rem;
    }
    
    .auth-card {
        padding: 2rem 1.5rem;
        max-width: 100%;
    }
    
    .auth-card .logo h1 {
        font-size: 2rem;
    }
}

/* ===== MEJORAS PARA EL LOGO DEL SIDEBAR ===== */
.sidebar .logo {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    background: linear-gradient(135deg, rgba(139, 90, 150, 0.1), rgba(168, 85, 167, 0.1));
}

.sidebar .logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #8B5A96, #A855A7, #9333EA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    text-shadow: none;
    letter-spacing: -0.5px;
    cursor: default;
    user-select: none;
}

.sidebar .logo h1:hover {
    background: linear-gradient(135deg, #9333EA, #A855A7, #8B5A96);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transform: scale(1.05);
    transition: all 0.3s ease;
}

/* ===== ESTILOS ADICIONALES PARA FORMULARIOS Y TABLAS MODERNAS ===== */
.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.user-info-mini {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.user-info-mini i {
    color: var(--primary-color);
}

.table-cell-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* ===== ESTILOS PARA SEGUIMIENTO DE VIDEOS ===== */
.video-tracking-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.video-tracking-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1.5rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.video-tracking-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.video-tracking-card.success {
    background: linear-gradient(135deg, var(--contrast-color) 0%, var(--contrast-dark) 100%);
}

.video-tracking-card.warning {
    background: linear-gradient(135deg, #F39C12 0%, #E67E22 100%);
}

.video-tracking-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: block;
}

.video-tracking-label {
    font-size: 0.9rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.student-progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-light);
    border-radius: 4px;
    overflow: hidden;
    margin: 0.5rem 0;
}

.student-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--contrast-color) 0%, var(--contrast-dark) 100%);
    border-radius: 4px;
    transition: width 0.6s ease;
}

.video-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.video-status-badge.watched {
    background: rgba(46, 204, 113, 0.1);
    color: var(--contrast-dark);
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.video-status-badge.not-watched {
    background: rgba(231, 76, 60, 0.1);
    color: #C0392B;
    border: 1px solid rgba(231, 76, 60, 0.3);
}

.video-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.course-selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.course-tracking-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: var(--transition);
    cursor: pointer;
}

.course-tracking-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.course-tracking-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.course-tracking-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
}

.course-tracking-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== PRINT STYLES ===== */
@media print {
    .sidebar,
    .header,
    .btn,
    .modal {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .card,
    .table-container {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

/* ===== ESTILOS PARA BARRAS DE PROGRESO DE DIPLOMAS ===== */
.diploma-progress {
    height: 25px !important;
    border-radius: 12px !important;
    background-color: #f8f9fa !important;
    border: 2px solid #e9ecef;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
    overflow: hidden;
}

.diploma-progress .progress-bar {
    font-weight: bold !important;
    font-size: 14px !important;
    border-radius: 10px !important;
    display: flex;
    align-items: center;
    justify-content: center;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
    transition: width 0.6s ease;
    min-width: 0;
    position: relative;
}

.diploma-progress .progress-bar.bg-success {
    background: linear-gradient(45deg, #28a745, #20c997) !important;
    border: 1px solid #1e7e34;
}

.diploma-progress .progress-bar.bg-warning {
    background: linear-gradient(45deg, #ffc107, #fd7e14) !important;
    border: 1px solid #d39e00;
    color: #212529 !important;
}

/* Animación para las barras de progreso */
.diploma-progress .progress-bar-striped {
    background-image: linear-gradient(45deg, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent) !important;
    background-size: 1rem 1rem;
    animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
    0% {
        background-position: 1rem 0;
    }
    100% {
        background-position: 0 0;
    }
}