/* ===================================
   SISTEMA ACADÉMICO - ESTILOS PROFESIONALES
   Diseño Moderno y Responsive
   =================================== */

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

:root {
    /* Colores principales */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #7c3aed;
    --secondary-dark: #6d28d9;
    
    /* Colores de estado */
    --success-color: #10b981;
    --success-dark: #059669;
    --danger-color: #ef4444;
    --danger-dark: #dc2626;
    --warning-color: #f59e0b;
    --warning-dark: #d97706;
    --info-color: #06b6d4;
    
    /* Colores neutros */
    --dark-color: #1f2937;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    
    --light-color: var(--gray-100);
    --border-color: var(--gray-200);
    --text-color: var(--gray-700);
    --text-light: var(--gray-500);
    
    /* Sombras */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --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 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Bordes */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transiciones */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 15px;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   PÁGINA DE LOGIN
   =================================== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: rotate 30s linear infinite;
}

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

.login-container {
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.login-box {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform var(--transition-base);
}

.login-box:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 35px rgba(0, 0, 0, 0.2);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-header h1 {
    color: var(--primary-color);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
}

.login-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.login-footer small {
    color: var(--text-light);
    font-size: 0.85rem;
}

.login-footer strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* ===================================
   NAVBAR MODERNA Y RESPONSIVE
   =================================== */
.navbar {
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.navbar-brand a {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: transform var(--transition-base);
    display: inline-block;
}

.navbar-brand a:hover {
    transform: scale(1.05);
}

.navbar-menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.navbar-menu li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.9rem;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
}

.navbar-menu li a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width var(--transition-base);
}

.navbar-menu li a:hover {
    color: var(--primary-color);
    background: var(--gray-50);
}

.navbar-menu li a:hover::before {
    width: 80%;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-left: var(--spacing-lg);
    border-left: 1px solid var(--border-color);
}

.navbar-user span {
    color: var(--text-color);
    font-size: 0.85rem;
    font-weight: 500;
    display: none;
}

/* Menú móvil toggle */
.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.navbar-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-color);
    transition: all var(--transition-base);
    border-radius: 2px;
}

.navbar-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggle.active span:nth-child(2) {
    opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ===================================
   CONTAINER Y LAYOUTS
   =================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 10px;
}

.page-header {
    margin-bottom: 10px;
}

.page-header h1 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 4px;
}

.page-header p {
    color: #6b7280;
    font-size: 13px;
}

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

/* ===================================
   FORMULARIOS MODERNOS
   =================================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
    letter-spacing: 0.01em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    transition: all var(--transition-base);
    background: var(--white);
    color: var(--text-color);
    font-family: inherit;
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--gray-300);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background: var(--white);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-400);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.input-group {
    display: flex;
    gap: var(--spacing-md);
}

.input-group input {
    flex: 1;
}

/* Estilos para inputs de archivo */
.form-group input[type="file"] {
    padding: 0.5rem;
    border: 2px dashed var(--gray-300);
    background: var(--gray-50);
    cursor: pointer;
}

.form-group input[type="file"]:hover {
    border-color: var(--primary-color);
    background: var(--gray-100);
}

/* Labels obligatorios */
.form-group label abbr,
.form-group label .required {
    color: var(--danger-color);
    text-decoration: none;
}

/* ===================================
   BOTONES MODERNOS CON EFECTOS
   =================================== */
.btn {
    padding: 0.65rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
    background: var(--white);
    border: 2px solid var(--gray-300);
    color: var(--text-color);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

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

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    border: none;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), var(--success-dark));
    color: var(--white);
    border: none;
}

.btn-success:hover {
    background: linear-gradient(135deg, var(--success-dark), var(--success-color));
}

.btn-delete,
.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), var(--danger-dark));
    color: var(--white);
    border: none;
}

.btn-delete:hover,
.btn-danger:hover {
    background: linear-gradient(135deg, var(--danger-dark), var(--danger-color));
}

.btn-edit,
.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), var(--warning-dark));
    color: var(--white);
    border: none;
}

.btn-edit:hover,
.btn-warning:hover {
    background: linear-gradient(135deg, var(--warning-dark), var(--warning-color));
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 0.45rem 1rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 0.85rem 2rem;
    font-size: 1rem;
}

/* Botón con icono */
.btn i,
.btn svg {
    font-size: 1.1em;
}

/* Botones deshabilitados */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* ===================================
   ALERTAS MODERNAS
   =================================== */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    border-left: 4px solid;
    animation: slideInDown 0.3s ease-out;
}

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

.alert::before {
    content: '';
    font-size: 1.25rem;
    flex-shrink: 0;
}

.alert-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border-color: var(--success-color);
    color: #065f46;
}

.alert-success::before {
    content: '✓';
    color: var(--success-color);
    font-weight: bold;
}

.alert-error {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    border-color: var(--danger-color);
    color: #991b1b;
}

.alert-error::before {
    content: '⚠';
    color: var(--danger-color);
    font-weight: bold;
}

.alert-warning {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-color: var(--warning-color);
    color: #92400e;
}

.alert-warning::before {
    content: 'ⓘ';
    color: var(--warning-color);
    font-weight: bold;
}

.alert-info {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-color: var(--info-color);
    color: #1e40af;
}

.alert-info::before {
    content: 'i';
    color: var(--info-color);
    font-weight: bold;
}

/* ===================================
   TARJETAS (CARDS) MODERNAS
   =================================== */
.dashboard-header {
    margin-bottom: var(--spacing-2xl);
}

.dashboard-header h1 {
    font-size: 1.2rem;
    color: var(--gray-900);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--gray-900), var(--gray-700));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-100);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    transform: scaleY(0);
    transition: transform var(--transition-base);
}

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

.stat-card:hover::before {
    transform: scaleY(1);
}

.stat-icon {
    font-size: 3rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.stat-info h3 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.stat-info p {
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
}

.dashboard-actions {
    margin-bottom: var(--spacing-2xl);
}

.dashboard-actions h2 {
    margin-bottom: var(--spacing-lg);
    color: var(--gray-900);
    font-weight: 700;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.action-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: var(--text-color);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-100);
    position: relative;
    overflow: hidden;
}

.action-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.action-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.action-card:hover::after {
    transform: scaleX(1);
}

.action-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.action-card h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.1rem;
}

.action-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ===================================
   TABLAS MODERNAS Y RESPONSIVE
   =================================== */
.table-responsive {
    overflow-x: auto;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    margin-bottom: var(--spacing-xl);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
}

.data-table th {
    padding: 1rem 1.25rem;
    text-align: left;
    font-weight: 700;
    color: var(--gray-900);
    border-bottom: 2px solid var(--gray-200);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--gray-100);
    color: var(--text-color);
    font-size: 0.9rem;
}

.data-table tbody tr {
    transition: all var(--transition-base);
}

.data-table tbody tr:hover {
    background: var(--gray-50);
    transform: scale(1.01);
    box-shadow: inset 4px 0 0 var(--primary-color);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.foto-mini {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--gray-200);
    transition: transform var(--transition-base);
}

.foto-mini:hover {
    transform: scale(1.3);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.foto-placeholder {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    border: 2px solid var(--gray-200);
}

/* Tabla vacía */
.data-table tbody tr td[colspan] {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-light);
    font-style: italic;
}

/* Responsive: scroll horizontal en móviles */
@media (max-width: 768px) {
    .data-table {
        font-size: 0.85rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 0.75rem;
    }
}

/* ===================================
   FILTROS
   =================================== */
.filter-box {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.filter-group {
    display: grid;
    grid-template-columns: 2fr 1fr auto auto;
    gap: 15px;
}

/* ===================================
   MODAL MODERNO
   =================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    overflow: auto;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease-out;
}

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

.modal-content {
    background-color: var(--white);
    margin: 3% auto;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    position: relative;
    animation: slideInUp 0.3s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    color: var(--gray-400);
    font-size: 2rem;
    font-weight: 300;
    cursor: pointer;
    transition: all var(--transition-base);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    line-height: 1;
}

.close:hover {
    color: var(--gray-900);
    background: var(--gray-100);
    transform: rotate(90deg);
}

.modal-content h2 {
    margin-bottom: var(--spacing-xl);
    color: var(--gray-900);
    font-weight: 700;
    padding-right: var(--spacing-2xl);
}

/* Scroll personalizado para modal */
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ===================================
   CONTROL DE ASISTENCIA
   =================================== */
.asistencia-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.scanner-section,
.asistencias-section {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.scanner-section h2,
.asistencias-section h2 {
    margin-bottom: 20px;
    color: var(--dark-color);
}

#qr-reader {
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    margin-bottom: 10px;
}

.manual-input {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.estudiante-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    display: flex;
    gap: 25px;
    align-items: center;
}

.estudiante-foto img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
}

.foto-placeholder-large {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--light-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    border: 4px solid var(--primary-color);
}

.estudiante-info h2 {
    color: var(--dark-color);
    margin-bottom: 10px;
}

.estudiante-info p {
    margin-bottom: 5px;
}

.asistencias-list {
    max-height: 500px;
    overflow-y: auto;
}

.asistencia-item {
    display: flex;
    gap: 15px;
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.asistencia-item:hover {
    background: var(--light-color);
}

.asistencia-time {
    font-weight: bold;
    color: var(--primary-color);
    min-width: 80px;
}

.asistencia-info strong {
    display: block;
    color: var(--dark-color);
}

.asistencia-info small {
    color: #6b7280;
}

/* ===================================
   CARNET
   =================================== */
.carnet-generator {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
}

.selector-section {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.carnet-preview {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.carnet {
    width: 350px;
    margin: 20px auto;
    border: 2px solid var(--dark-color);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.carnet-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 20px;
    text-align: center;
}

.carnet-header h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

.carnet-header p {
    font-size: 14px;
    opacity: 0.9;
}

.carnet-body {
    padding: 20px;
}

.carnet-foto {
    text-align: center;
    margin-bottom: 15px;
}

.carnet-foto img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
}

.foto-placeholder-carnet {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--light-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    border: 3px solid var(--primary-color);
}

.carnet-datos {
    margin-bottom: 15px;
}

.carnet-datos p {
    margin-bottom: 8px;
    font-size: 14px;
}

.carnet-qr {
    text-align: center;
    padding: 15px;
    background: var(--light-color);
    border-radius: 8px;
}

.qr-label {
    margin-top: 10px;
    font-size: 12px;
    color: #6b7280;
}

.carnet-footer {
    background: var(--light-color);
    padding: 10px;
    text-align: center;
}

.carnet-footer small {
    font-size: 11px;
    color: #6b7280;
}

.carnet-actions {
    text-align: center;
    margin-top: 20px;
}

/* ===================================
   REPORTES
   =================================== */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-box {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-box h3 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-box p {
    color: #6b7280;
    font-size: 14px;
}

.recent-activity {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.recent-activity h2 {
    margin-bottom: 20px;
    color: var(--dark-color);
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background: var(--white);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
    box-shadow: 0 -2px 8px rgba(0,0,0,0.05);
}

.footer p {
    text-align: center;
    color: var(--text-light);
    font-size: 0.85rem;
}

/* ===================================
   UTILIDADES Y HELPERS
   =================================== */

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.35em 0.75em;
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1;
}

.badge-success {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #065f46;
}

.badge-danger {
    background: linear-gradient(135deg, #fee2e2, #fecaca);
    color: #991b1b;
}

.badge-warning {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
}

.badge-info {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    color: #1e40af;
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: var(--spacing-xl) auto;
}

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

/* Text utilities */
.text-center {
    text-align: center;
}

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

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

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

.text-success {
    color: var(--success-color);
}

.text-danger {
    color: var(--danger-color);
}

/* Spacing utilities */
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

/* Scrollbar personalizado */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* Selection */
::selection {
    background: var(--primary-color);
    color: var(--white);
}

::-moz-selection {
    background: var(--primary-color);
    color: var(--white);
}

/* Focus visible para accesibilidad */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===================================
   IMPRESIÓN (para carnets)
   =================================== */
@media print {
    body * {
        visibility: hidden;
    }
    
    #carnet, #carnet * {
        visibility: visible;
    }
    
    #carnet {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
    }
    
    .navbar, .page-header, .selector-section, .carnet-actions, .footer {
        display: none !important;
    }
}

/* ===================================
   RESPONSIVE DESIGN - MOBILE FIRST
   =================================== */

/* Tablets y dispositivos medianos (768px - 1024px) */
@media (max-width: 1024px) {
    .navbar-container {
        padding: 0 var(--spacing-md);
    }
    
    .container {
        padding: var(--spacing-lg);
    }
    
    .stats-grid,
    .action-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Móviles grandes (481px - 768px) */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    
    /* Navbar responsive */
    .navbar-container {
        height: 60px;
    }
    
    .navbar-brand a {
        font-size: 1.1rem;
    }
    
    .navbar-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: 0;
        transition: left var(--transition-slow);
        box-shadow: var(--shadow-xl);
        overflow-y: auto;
    }
    
    .navbar-menu.active {
        left: 0;
    }
    
    .navbar-menu li {
        width: 100%;
        border-bottom: 1px solid var(--gray-100);
    }
    
    .navbar-menu li a {
        display: block;
        padding: var(--spacing-md);
        width: 100%;
    }
    
    .navbar-user {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        padding-left: 0;
        border-left: none;
        border-top: 2px solid var(--gray-200);
        padding-top: var(--spacing-md);
        margin-top: var(--spacing-md);
    }
    
    .navbar-user span {
        display: block;
    }
    
    .navbar-toggle {
        display: flex;
    }
    
    /* Dashboard */
    .dashboard-header h1 {
        font-size: 1.1rem;
    }
    
    .stats-grid,
    .action-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
    
    .stat-icon {
        font-size: 2.5rem;
    }
    
    .stat-info h3 {
        font-size: 1.75rem;
    }
    
    /* Formularios */
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
    
    /* Filtros */
    .filter-group {
        grid-template-columns: 1fr;
    }
    
    /* Asistencia */
    .asistencia-container,
    .carnet-generator {
        grid-template-columns: 1fr;
    }
    
    /* Estudiante card */
    .estudiante-card {
        flex-direction: column;
        text-align: center;
    }
    
    /* Modal */
    .modal-content {
        width: 95%;
        margin: 20px auto;
        padding: var(--spacing-lg);
    }
    
    /* Portal de padres */
    .portal-header {
        flex-direction: column;
        text-align: center;
    }
    
    .mes-stats {
        grid-template-columns: 1fr;
    }
}

/* Móviles pequeños (320px - 480px) */
@media (max-width: 480px) {
    .login-container {
        padding: var(--spacing-sm);
    }
    
    .login-box {
        padding: var(--spacing-xl);
    }
    
    .login-header h1 {
        font-size: 1.2rem;
    }
    
    .container {
        padding: var(--spacing-md);
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .page-header .btn {
        width: 100%;
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
    }
    
    .action-card {
        padding: var(--spacing-lg);
    }
    
    .data-table th,
    .data-table td {
        padding: 0.5rem;
        font-size: 0.8rem;
    }
    
    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.85rem;
    }
    
    .btn-sm {
        padding: 0.4rem 0.8rem;
        font-size: 0.75rem;
    }
}

/* Pantallas muy grandes (1440px+) */
@media (min-width: 1440px) {
    .container {
        max-width: 1600px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .action-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

/* Landscape en móviles */
@media (max-height: 500px) and (orientation: landscape) {
    .login-page {
        padding: var(--spacing-sm);
    }
    
    .login-box {
        padding: var(--spacing-lg);
    }
}

/* Touch devices - áreas táctiles más grandes */
@media (hover: none) and (pointer: coarse) {
    .btn {
        padding: 0.75rem 1.5rem;
        min-height: 44px;
    }
    
    .navbar-menu li a {
        min-height: 48px;
    }
    
    input,
    select,
    textarea {
        min-height: 44px;
    }
}