/* =================================================================
   Configuración General y Variables CSS
================================================================= */
:root {
    /* Colores principales */
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #ecf0f1;
    --accent-color: #e74c3c;
    
    /* Colores de fondo */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #ecf0f1;
    
    /* Colores de texto */
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #bdc3c7;
    
    /* Colores de borde */
    --border-color: #e1e8ed;
    --border-light: #f1f3f4;
    
    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    
    /* Medidas */
    --sidebar-width: 280px;
    --header-height: 70px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Transiciones */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

/* Modo oscuro */
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-light: #808080;
    --border-color: #404040;
    --border-light: #353535;
}

/* =================================================================
   Reset y Base
================================================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

/* =================================================================
   Pantalla de Carga
================================================================= */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.3s ease;
}

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* =================================================================
   Modales Modernos y Profesionales
================================================================= */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 20px;
    box-shadow: 
        0 20px 50px rgba(0, 0, 0, 0.15),
        0 4px 20px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
    max-width: 600px;
    width: 95%;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.8) translateY(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2, #667eea);
    background-size: 200% 100%;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.modal.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 25px 30px 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 249, 250, 0.8) 100%);
    position: relative;
}

.modal-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 30px;
    right: 30px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.3), transparent);
}

.modal-title-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.modal-title-section i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-size: 16px;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.modal-header h3 {
    margin: 0;
    color: #2d3748;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-close {
    background: rgba(0, 0, 0, 0.05);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    color: #718096;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    font-size: 16px;
    position: relative;
    overflow: hidden;
}

.modal-close::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 12px;
}

.modal-close:hover {
    transform: scale(1.1);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.modal-close:hover::before {
    opacity: 1;
}

.modal-close i {
    position: relative;
    z-index: 1;
}

/* Cuerpo del modal con scroll personalizado */
.modal-body {
    padding: 30px;
    max-height: calc(90vh - 160px);
    overflow-y: auto;
}

.modal-body::-webkit-scrollbar {
    width: 6px;
}

.modal-body::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 3px;
}

.modal-body::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 3px;
}

/* Estilos del formulario dentro del modal */
.modal form {
    padding: 0;
}

.modal .form-group {
    margin-bottom: 24px;
    position: relative;
}

.modal .form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: #4a5568;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.modal .form-group label i {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    font-size: 14px;
}

.modal .form-group input,
.modal .form-group select,
.modal .form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 0.95rem;
    color: #2d3748;
    background: #ffffff;
    transition: all 0.3s ease;
    font-family: inherit;
}

.modal .form-group input:focus,
.modal .form-group select:focus,
.modal .form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

.modal .form-group input[type="color"] {
    height: 50px;
    padding: 4px;
    cursor: pointer;
}

.modal .form-group textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
    line-height: 1.5;
}

.modal .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

/* Footer del modal */
.modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding: 20px 30px 30px;
    background: linear-gradient(135deg, rgba(248, 249, 250, 0.8) 0%, rgba(255, 255, 255, 0.9) 100%);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    position: relative;
}

.modal-footer::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 30px;
    right: 30px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.3), transparent);
}

.modal-footer .btn {
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 120px;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.modal-footer .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 ease;
}

.modal-footer .btn:hover::before {
    left: 100%;
}

.modal-footer .btn-outline {
    background: transparent;
    border: 2px solid #e2e8f0;
    color: #718096;
}

.modal-footer .btn-outline:hover {
    background: #f7fafc;
    border-color: #cbd5e0;
    color: #4a5568;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.modal-footer .btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: 2px solid transparent;
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.modal-footer .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

/* Animaciones de entrada específicas por tipo de modal */
.modal[id*="event"] .modal-content {
    background: linear-gradient(145deg, #fff5f5 0%, #ffffff 100%);
}

.modal[id*="event"] .modal-title-section i {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
}

.modal[id*="subject"] .modal-content {
    background: linear-gradient(145deg, #f0fff4 0%, #ffffff 100%);
}

.modal[id*="subject"] .modal-title-section i {
    background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
}

.modal[id*="note"] .modal-content {
    background: linear-gradient(145deg, #fffaf0 0%, #ffffff 100%);
}

.modal[id*="note"] .modal-title-section i {
    background: linear-gradient(135deg, #ed8936 0%, #dd6b20 100%);
}

.modal[id*="task"] .modal-content {
    background: linear-gradient(145deg, #f7fafc 0%, #ffffff 100%);
}

.modal[id*="task"] .modal-title-section i {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* =================================================================
   Autenticación
================================================================= */
.auth-container {
    padding: 40px;
    text-align: center;
}

.auth-header {
    margin-bottom: 30px;
}

.auth-header .logo {
    width: 60px;
    height: 60px;
    margin-bottom: 15px;
}

.auth-header h1 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 2rem;
    font-weight: 700;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-form h2 {
    margin-bottom: 25px;
    color: var(--text-primary);
}

.auth-switch {
    margin-top: 20px;
    color: var(--text-secondary);
}

.auth-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* Estilos para botones de cambio de formulario */
.auth-actions {
    margin-top: 20px;
    text-align: center;
}

.btn-register {
    width: 100%;
    margin-top: 10px;
    padding: 12px 20px;
    font-size: 0.95em;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.btn-register:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.btn-login {
    width: 100%;
    margin-top: 10px;
    padding: 12px 20px;
    font-size: 0.95em;
    border: 2px solid var(--success-color);
    background: transparent;
    color: var(--success-color);
    transition: all 0.3s ease;
}

.btn-login:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
}

/* =================================================================
   Formularios
================================================================= */
.form-group {
    position: relative;
    margin-bottom: 20px;
}

.form-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    z-index: 1;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 15px 15px 15px 45px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 16px;
    transition: var(--transition-fast);
}

.form-group small.form-help {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
    padding-left: 45px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input[type="color"] {
    padding: 5px;
    height: 50px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

/* =================================================================
   Botones
================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.btn-success {
    background: #27ae60;
    color: white;
}

.btn-success:hover {
    background: #219a52;
}

.btn-warning {
    background: #f39c12;
    color: white;
}

.btn-warning:hover {
    background: #e67e22;
}

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

.btn-danger:hover {
    background: #c0392b;
}

/* =================================================================
   Layout Principal
================================================================= */
.app {
    display: flex;
    min-height: 100vh;
}

/* =================================================================
   Sidebar
================================================================= */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    display: flex;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
    width: 35px;
    height: 35px;
    margin-right: 15px;
}

.sidebar-header h3 {
    color: var(--primary-color);
    font-weight: 700;
    margin-right: auto;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius);
    transition: var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 5px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 25px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    border-right: 3px solid transparent;
}

.nav-link:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--bg-secondary);
    color: var(--primary-color);
    border-right-color: var(--primary-color);
}

.nav-link i {
    font-size: 18px;
    width: 20px;
}

.sidebar-footer {
    padding: 20px 25px;
    border-top: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.user-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    object-fit: cover;
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.logout-btn {
    width: 100%;
    justify-content: center;
}

/* =================================================================
   Contenido Principal
================================================================= */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

/* =================================================================
   Header
================================================================= */
.header {
    height: var(--header-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius);
}

.mobile-menu-toggle:hover {
    background: var(--bg-secondary);
}

#page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.notifications {
    position: relative;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--accent-color);
    color: white;
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

/* =================================================================
   Contenido de Secciones
================================================================= */
.content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
}

.section-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

/* =================================================================
   Cards
================================================================= */
.card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-weight: 600;
}

.view-all {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

.view-all:hover {
    text-decoration: underline;
}

/* =================================================================
   Dashboard
================================================================= */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    height: calc(100vh - 160px);
}

.stats-card {
    grid-column: 1 / -1;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding: 25px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    transition: var(--transition-fast);
    position: relative;
}

.stat-item.clickable {
    cursor: pointer;
    border: 2px solid transparent;
}

.stat-item.clickable:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-item i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.stat-item.clickable:hover i {
    transform: scale(1.1);
}

.stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.stat-action {
    position: absolute;
    top: 15px;
    right: 15px;
    opacity: 0;
    transition: var(--transition-fast);
}

.stat-item.clickable:hover .stat-action {
    opacity: 1;
}

.stat-action i {
    font-size: 1rem;
    color: var(--primary-color);
}

/* Acciones de tarjetas */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-light);
}

.card-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.875rem;
}

/* Accesos rápidos */
.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    padding: 25px;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--text-primary);
    text-decoration: none;
}

.quick-action-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-action-btn i {
    font-size: 1.5rem;
}

.quick-action-btn span {
    font-size: 0.875rem;
    font-weight: 500;
}

/* Progreso de tareas */
.progress-container {
    padding: 25px;
}

.progress-item {
    margin-bottom: 20px;
}

.progress-item:last-child {
    margin-bottom: 0;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.progress-count {
    font-weight: 600;
    color: var(--text-primary);
}

.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.progress-fill.pending {
    background: linear-gradient(90deg, #e74c3c, #c0392b);
}

.progress-fill.in-progress {
    background: linear-gradient(90deg, #f39c12, #e67e22);
}

.progress-fill.completed {
    background: linear-gradient(90deg, #27ae60, #229954);
}

/* Listas mejoradas */
.activity-list,
.task-list,
.events-list {
    padding: 25px;
    max-height: 400px;
    overflow-y: auto;
}

.activity-item,
.task-item,
.event-item {
    padding: 15px 0;
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.activity-item:hover,
.task-item:hover,
.event-item:hover {
    background: var(--bg-secondary);
    margin: 0 -15px;
    padding: 15px;
    border-radius: var(--border-radius);
}

.activity-item:last-child,
.task-item:last-child,
.event-item:last-child {
    border-bottom: none;
}

/* Elementos interactivos */
.task-item.clickable,
.event-item.clickable {
    cursor: pointer;
}

.task-priority {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.task-priority.high {
    background: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
}

.task-priority.medium {
    background: rgba(243, 156, 18, 0.1);
    color: #f39c12;
}

.task-priority.low {
    background: rgba(39, 174, 96, 0.1);
    color: #27ae60;
}

/* Metadatos de tareas y eventos */
.task-meta,
.event-meta {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: 5px;
    flex-wrap: wrap;
}

.task-due,
.event-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.task-due.overdue {
    color: #e74c3c;
    font-weight: 600;
}

.task-due.today {
    color: #f39c12;
    font-weight: 600;
}

.task-due.tomorrow {
    color: var(--primary-color);
    font-weight: 500;
}

.task-subject,
.event-subject {
    font-size: 0.75rem;
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    color: var(--text-secondary);
}

.task-status,
.event-type-icon {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
}

/* Estado vacío */
.empty-state {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: 20px;
}

/* Información de eventos */
.event-info h4,
.task-info h4 {
    margin: 0 0 5px 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.event-info p,
.task-info p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Botón de actualizar con animación */
.btn-refresh {
    transition: transform 0.3s ease;
}

.btn-refresh.spinning {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* =================================================================
   Calendario
================================================================= */
.calendar-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: 25px;
    box-shadow: var(--shadow-sm);
}

#calendar {
    min-height: 600px;
}

/* Estilos personalizados para FullCalendar */
.fc {
    color: var(--text-primary);
}

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

.fc-button-primary:hover {
    background-color: var(--primary-dark) !important;
    border-color: var(--primary-dark) !important;
}

.fc-today-button {
    background-color: transparent !important;
    color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}

/* Estilos para tareas en el calendario */
.fc-event.calendar-task {
    border-left: 4px solid !important;
    border-radius: 4px !important;
    padding: 2px 6px !important;
    font-size: 12px !important;
    position: relative;
}

.fc-event.calendar-task .fc-event-title {
    font-weight: 500;
}

/* Estados de tareas */
.fc-event.task-terminado {
    opacity: 0.6;
    text-decoration: line-through;
    background-color: var(--text-light) !important;
    border-color: var(--text-light) !important;
}

.fc-event.task-en_progreso {
    background-color: rgba(52, 152, 219, 0.1) !important;
    border-color: #3498db !important;
    color: #2980b9 !important;
}

.fc-event.task-pendiente {
    background-color: rgba(255, 255, 255, 0.1) !important;
}

/* Prioridades de tareas */
.fc-event.priority-high {
    border-left-color: #e74c3c !important;
    background-color: rgba(231, 76, 60, 0.1) !important;
}

.fc-event.priority-medium {
    border-left-color: #f39c12 !important;
    background-color: rgba(243, 156, 18, 0.1) !important;
}

.fc-event.priority-low {
    border-left-color: #27ae60 !important;
    background-color: rgba(39, 174, 96, 0.1) !important;
}

/* Tooltip personalizado */
.event-tooltip {
    background: rgba(0, 0, 0, 0.9) !important;
    color: white !important;
    padding: 10px 14px !important;
    border-radius: 6px !important;
    font-size: 12px !important;
    line-height: 1.4 !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15) !important;
    z-index: 9999 !important;
}

.event-tooltip strong {
    color: #fff !important;
    font-weight: 600;
}

.event-tooltip i {
    margin-right: 4px;
    opacity: 0.8;
}

/* Estilos responsivos para el calendario */
@media (max-width: 768px) {
    .fc-event.calendar-task,
    .fc-event {
        font-size: 11px !important;
        padding: 1px 4px !important;
    }
    
    .fc-event.calendar-task .fc-event-title,
    .fc-event .fc-event-title {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    
    .event-tooltip {
        font-size: 11px !important;
        padding: 8px 10px !important;
        max-width: 200px !important;
    }
}

/* Leyenda del calendario */
.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    flex-shrink: 0;
}

.legend-item.events .legend-color {
    background: var(--primary-color);
}

.legend-item.tasks-high .legend-color {
    background: #e74c3c;
}

.legend-item.tasks-medium .legend-color {
    background: #f39c12;
}

.legend-item.tasks-low .legend-color {
    background: #27ae60;
}

.legend-item.tasks-completed .legend-color {
    background: var(--text-light);
}

/* =================================================================
   Asignaturas
================================================================= */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.subject-card {
    position: relative;
    cursor: pointer;
    transition: var(--transition-fast);
}

.subject-card:hover {
    transform: translateY(-2px);
}

.subject-color {
    width: 4px;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    border-radius: var(--border-radius-lg) 0 0 var(--border-radius-lg);
}

.subject-content {
    padding: 25px;
    padding-left: 30px;
}

.subject-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.subject-professor {
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.subject-schedule {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* =================================================================
   Notas
================================================================= */
.notes-actions {
    display: flex;
    gap: 20px;
    align-items: center;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.note-card {
    cursor: pointer;
    transition: var(--transition-fast);
}

.note-card:hover {
    transform: translateY(-2px);
}

.note-content {
    padding: 25px;
}

.note-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

    .note-preview {
        color: var(--text-secondary);
        font-size: 0.9rem;
        line-height: 1.5;
        margin-bottom: 15px;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }.note-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-light);
}

/* =================================================================
   Tareas
================================================================= */
.tasks-filters {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 14px;
}

.filter-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.tasks-list {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.task-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.task-item:hover {
    background: var(--bg-secondary);
}

.task-item:last-child {
    border-bottom: none;
}

.task-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.task-checkbox.completed {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.task-details {
    flex: 1;
}

.task-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.task-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.task-meta {
    display: flex;
    gap: 15px;
    font-size: 0.8rem;
    color: var(--text-light);
}

.task-priority {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
}

.task-priority.low {
    background: #d5f4e6;
    color: #27ae60;
}

.task-priority.medium {
    background: #fef5e7;
    color: #f39c12;
}

.task-priority.high {
    background: #fadbd8;
    color: var(--accent-color);
}

/* =================================================================
   Perfil
================================================================= */
.profile-container {
    max-width: 600px;
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 25px;
    padding: 30px;
    border-bottom: 1px solid var(--border-color);
}

.profile-avatar {
    position: relative;
}

.profile-avatar img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-upload-btn {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.profile-info h3 {
    margin-bottom: 5px;
    color: var(--text-primary);
}

.profile-info p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.profile-role {
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.profile-form {
    padding: 30px;
}

/* =================================================================
   Responsive Design
================================================================= */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 0;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .content {
        padding: 20px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .notes-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        max-width: none;
    }
    
    .subjects-grid,
    .notes-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .quick-actions-grid {
        grid-template-columns: 1fr;
    }

    .quick-action-btn {
        padding: 15px;
    }

    .task-meta,
    .event-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .card-actions {
        flex-direction: row;
        width: 100%;
        justify-content: space-between;
    }
    
    .profile-header {
        flex-direction: column;
        text-align: center;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .auth-container {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0 15px;
    }
    
    .content {
        padding: 15px;
    }
    
    .task-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .tasks-filters {
        justify-content: center;
    }
    
    .filter-btn {
        flex: 1;
        min-width: 0;
    }
}

/* =================================================================
   Utilidades
================================================================= */
.hidden {
    display: none !important;
}

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

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

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }

.p-0 { padding: 0; }
.p-1 { padding: 10px; }
.p-2 { padding: 20px; }
.p-3 { padding: 30px; }

/* =================================================================
   Scrollbars personalizados
================================================================= */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* =================================================================
   Animaciones adicionales
================================================================= */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

.slide-in {
    animation: slideIn 0.3s ease;
}

/* =================================================================
   Estilos para Sistema de Colaboración
================================================================= */

/* Notificación de registro libre */
.register-notice {
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
    color: white;
    padding: 12px 16px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.register-notice i {
    margin-right: 8px;
    font-size: 1.1em;
}

.register-notice p {
    margin: 0;
    font-weight: 500;
}

/* Mensaje de colaboración en login */
.auth-info {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9em;
    margin-top: 20px;
    padding: 10px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
}

.auth-info i {
    margin-right: 6px;
    color: var(--primary-color);
}

/* Sección de colaboración en perfil */
.invite-card {
    margin-top: 30px;
}

.invite-card .card-header {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    padding: 20px;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    border: none;
    margin: 0;
}

.invite-card .card-header h3 {
    margin: 0 0 8px 0;
    font-size: 1.3em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.invite-card .card-header p {
    margin: 0;
    opacity: 0.9;
    font-size: 0.95em;
}

/* Información de colaboración */
.collaboration-info {
    padding: 20px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-light);
}

.info-item:last-child {
    border-bottom: none;
}

.info-item i {
    font-size: 1.2em;
    color: var(--primary-color);
    margin-top: 3px;
    min-width: 20px;
}

.info-item div {
    flex: 1;
}

.info-item strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 4px;
    font-size: 1em;
}

.info-item p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9em;
    line-height: 1.4;
}

/* Acciones de colaboración */
.collaboration-actions {
    padding: 0 20px 20px;
    text-align: center;
}

.collaboration-actions .btn {
    min-width: 200px;
}

/* Efectos y animaciones de colaboración */
.copy-success {
    background: rgba(39, 174, 96, 0.1) !important;
    border-color: #27ae60 !important;
    animation: copyPulse 0.6s ease;
}

/* =================================================================
   Modal de Gestión de Colaboradores
================================================================= */

/* Lista de colaboradores */
.collaborators-list {
    max-height: 300px;
    overflow-y: auto;
    margin-top: 15px;
}

.collaborator-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    background: var(--bg-primary);
    transition: all 0.3s ease;
}

.collaborator-item:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--border-color);
}

.collaborator-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
}

.collaborator-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2em;
}

.collaborator-details h4 {
    margin: 0 0 4px 0;
    font-size: 1em;
    color: var(--text-primary);
}

.collaborator-details p {
    margin: 0 0 6px 0;
    font-size: 0.85em;
    color: var(--text-secondary);
}

.role-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75em;
    font-weight: 500;
    text-transform: uppercase;
}

.role-badge.propietario {
    background: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
    border: 1px solid rgba(231, 76, 60, 0.3);
}

.role-badge.colaborador {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
    border: 1px solid rgba(52, 152, 219, 0.3);
}

.collaborator-actions {
    display: flex;
    gap: 8px;
}

/* Lista de invitaciones pendientes */
.pending-invitations-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}

.pending-invitations-list {
    max-height: 200px;
    overflow-y: auto;
    margin-top: 15px;
}

.pending-invitation-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 15px;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    background: rgba(255, 193, 7, 0.05);
    border-left: 4px solid #ffc107;
}

.invitation-info {
    flex: 1;
}

.invitation-target {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-primary);
}

.invitation-date {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85em;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.invitation-message {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.9em;
    margin-top: 8px;
    padding: 8px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
}

.invitation-actions {
    display: flex;
    gap: 8px;
    margin-left: 15px;
}

/* Estado vacío */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3em;
    margin-bottom: 15px;
    opacity: 0.5;
}

.empty-state p {
    margin: 0;
    font-size: 1.1em;
}

/* Formulario de invitación */
.invite-section {
    margin-bottom: 30px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
}

.invite-section h5 {
    margin: 0 0 15px 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Modal de confirmación de invitación */
#subject-invitation-modal .modal-content {
    max-width: 500px;
}

.invitation-details {
    margin: 20px 0;
}

.subject-card {
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    background: var(--bg-primary);
}

.subject-header {
    padding: 15px;
    color: white;
    text-align: center;
}

.subject-header h4 {
    margin: 0;
    font-size: 1.2em;
    font-weight: 600;
}

.subject-info {
    padding: 15px;
}

.subject-info p {
    margin: 8px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}

.subject-info p i {
    width: 16px;
    color: var(--primary-color);
}

.subject-info strong {
    color: var(--text-primary);
}

@keyframes copyPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

/* =================================================================
   Estilos Responsivos para Modales
================================================================= */

/* Tablets */
@media (max-width: 768px) {
    .modal-content {
        max-width: 90%;
        width: 95%;
        border-radius: 16px;
    }
    
    .modal-header {
        padding: 20px 25px 15px;
    }
    
    .modal-header h3 {
        font-size: 1.3rem;
    }
    
    .modal-title-section i {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
    
    .modal-body, 
    .modal form {
        padding: 25px;
    }
    
    .modal .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .modal-footer {
        padding: 15px 25px 25px;
        flex-wrap: wrap;
    }
    
    .modal-footer .btn {
        min-width: 100px;
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

/* Móviles */
@media (max-width: 480px) {
    .modal {
        padding: 10px;
        align-items: flex-start;
        padding-top: 40px;
    }
    
    .modal-content {
        width: 100%;
        max-width: 100%;
        border-radius: 12px;
        max-height: 85vh;
    }
    
    .modal-header {
        padding: 18px 20px 12px;
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .modal-header h3 {
        font-size: 1.2rem;
        flex: 1;
    }
    
    .modal-title-section {
        gap: 10px;
        flex: 1;
    }
    
    .modal-title-section i {
        width: 32px;
        height: 32px;
        font-size: 13px;
    }
    
    .modal-close {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
    
    .modal-body,
    .modal form {
        padding: 20px;
    }
    
    .modal .form-group {
        margin-bottom: 20px;
    }
    
    .modal .form-group input,
    .modal .form-group select,
    .modal .form-group textarea {
        padding: 12px 16px;
        font-size: 16px; /* Evita zoom en iOS */
        border-radius: 10px;
    }
    
    .modal .form-group textarea {
        min-height: 100px;
    }
    
    .modal-footer {
        padding: 15px 20px 20px;
        flex-direction: column-reverse;
        gap: 10px;
    }
    
    .modal-footer .btn {
        width: 100%;
        min-width: auto;
        padding: 14px 20px;
        font-size: 0.95rem;
        justify-content: center;
    }
}

/* Móviles muy pequeños */
@media (max-width: 320px) {
    .modal {
        padding: 5px;
        padding-top: 20px;
    }
    
    .modal-content {
        max-height: 90vh;
    }
    
    .modal-header {
        padding: 15px 18px 10px;
    }
    
    .modal-body,
    .modal form {
        padding: 18px;
    }
    
    .modal .form-group input,
    .modal .form-group select,
    .modal .form-group textarea {
        padding: 10px 14px;
    }
    
    .modal-footer {
        padding: 12px 18px 18px;
    }
}

/* =================================================================
   Estilos Adicionales para Formularios
================================================================= */

/* Color picker styling */
.form-group input[type="color"] {
    height: 45px;
    width: 80px;
    padding: 2px;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    background: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
    border-radius: 8px;
    overflow: hidden;
}

.form-group input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 8px;
}

.form-group input[type="color"]:hover {
    border-color: rgba(255, 255, 255, 0.4);
    transform: scale(1.05);
}

/* Form row improvements */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-row .form-group {
    margin-bottom: 0;
}

/* Select with icons improvements */
.form-group select option {
    padding: 8px 12px;
    background-color: var(--secondary-bg);
    color: var(--text-primary);
}

/* Textarea improvements */
.form-group textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
    line-height: 1.5;
}

/* Enhanced label styling with icons */
.form-group label i {
    margin-right: 8px;
    color: var(--primary-color);
    width: 16px;
    text-align: center;
}

/* =================================================================
   ESTILOS ESPECÍFICOS PARA BOTONES DE ELIMINACIÓN
================================================================= */

/* Estilos específicos para botón de eliminar en modales */
.modal-footer .btn-danger {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    border: none;
    color: white;
    transition: all 0.3s ease;
    font-weight: 600;
}

.modal-footer .btn-danger:hover {
    background: linear-gradient(135deg, #ee5a24, #c44569);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(238, 90, 36, 0.3);
}

.modal-footer .btn-danger:active {
    transform: translateY(0);
    box-shadow: 0 4px 15px rgba(238, 90, 36, 0.4);
}

/* Botones de eliminar en listas y tarjetas */
.btn-icon.btn-danger {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    border: none;
    transition: all 0.3s ease;
}

.btn-icon.btn-danger:hover {
    background: linear-gradient(135deg, #ee5a24, #c44569);
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(238, 90, 36, 0.3);
}

/* Botón de eliminar en tarjetas de asignaturas */
.action-btn.delete-subject {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    border: none;
    transition: all 0.3s ease;
}

.action-btn.delete-subject:hover {
    background: linear-gradient(135deg, #ee5a24, #c44569);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(238, 90, 36, 0.3);
}

/* Responsive: ajustar botones en móviles */
@media (max-width: 768px) {
    .modal-footer .btn-danger {
        order: 3;
        width: 100%;
        margin-top: 8px;
    }
    
    .btn-icon.btn-danger {
        min-width: 44px;
        min-height: 44px;
    }
}