/* ========================================
   CSS BASE - Sistema de Tests de Preparatoria
   Versión: 2.0.0
   Autor: Cobá Networks
   ======================================== */

/* Reset y configuración base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100vh;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100vh;
}

/* Variables CSS */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --box-shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
    --transition-fast: all 0.1s ease;
}

/* Contenedores principales */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-fluid {
    width: 100%;
    padding: 0 20px;
}

.container-lg {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Layout principal */
.main-layout {
    display: flex;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
}

.sidebar {
    width: 280px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 30px 20px;
    box-shadow: var(--box-shadow-lg);
    position: relative;
    height: auto;
    overflow-y: auto;
    z-index: 1000;
}

.main-content {
    flex: 1;
    padding: 30px;
    background: var(--light-color);
    min-height: 100vh;
}

/* Header y navegación */
.header {
    background: var(--white);
    padding: 20px 30px;
    box-shadow: var(--box-shadow);
    margin-bottom: 30px;
    border-radius: var(--border-radius-lg);
}

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

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 20px;
    position: relative;
    z-index: 99997;
}

.nav-link {
    color: var(--gray-700);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--border-radius);
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

/* Cards y paneles */
.card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    padding: 30px;
    margin-bottom: 30px;
    border: 1px solid var(--gray-200);
}

.card-header {
    border-bottom: 1px solid var(--gray-200);
    padding-bottom: 20px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
    margin: 0;
}

.card-subtitle {
    color: var(--gray-600);
    margin: 5px 0 0 0;
}

/* Botones */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    line-height: 1.5;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
}

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

.btn-secondary {
    background: var(--gray-600);
    color: var(--white);
}

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

.btn-warning {
    background: var(--warning-color);
    color: var(--dark-color);
}

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

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

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

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

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

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

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

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius);
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

.form-control.is-valid {
    border-color: var(--success-color);
}

/* Grid system */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    flex: 1;
    padding: 0 15px;
}

.col-1 { flex: 0 0 8.333333%; }
.col-2 { flex: 0 0 16.666667%; }
.col-3 { flex: 0 0 25%; }
.col-4 { flex: 0 0 33.333333%; }
.col-6 { flex: 0 0 50%; }
.col-8 { flex: 0 0 66.666667%; }
.col-9 { flex: 0 0 75%; }
.col-12 { flex: 0 0 100%; }

/* Utilidades */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--secondary-color); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-danger { color: var(--danger-color); }
.text-info { color: var(--info-color); }
.text-muted { color: var(--gray-600); }

.bg-primary { background-color: var(--primary-color); }
.bg-secondary { background-color: var(--secondary-color); }
.bg-success { background-color: var(--success-color); }
.bg-warning { background-color: var(--warning-color); }
.bg-danger { background-color: var(--danger-color); }
.bg-info { background-color: var(--info-color); }
.bg-light { background-color: var(--light-color); }
.bg-white { background-color: var(--white); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }

.justify-content-start { justify-content: flex-start; }
.justify-content-center { justify-content: center; }
.justify-content-end { justify-content: flex-end; }
.justify-content-between { justify-content: space-between; }

.align-items-start { align-items: flex-start; }
.align-items-center { align-items: center; }
.align-items-end { align-items: flex-end; }

.flex-column { flex-direction: column; }
.flex-row { flex-direction: row; }

.m-0 { margin: 0; }
.m-1 { margin: 0.25rem; }
.m-2 { margin: 0.5rem; }
.m-3 { margin: 1rem; }
.m-4 { margin: 1.5rem; }
.m-5 { margin: 3rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

/* Alertas y mensajes */
.alert {
    padding: 16px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    border: 1px solid transparent;
}

.alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: #ffeaa7;
    color: #856404;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

.alert-info {
    background-color: #d1ecf1;
    border-color: #bee5eb;
    color: #0c5460;
}

/* Tooltips */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 200px;
    background-color: var(--dark-color);
    color: var(--white);
    text-align: center;
    border-radius: var(--border-radius);
    padding: 8px 12px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.9rem;
}

.tooltip .tooltiptext::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--dark-color) transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    /* Layout principal para móviles */
    .main-layout {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        order: 2; /* Mover sidebar después del contenido en móviles */
    }
    
    .main-content {
        margin-left: 0;
        padding: 15px;
        order: 1; /* Contenido primero en móviles */
    }
    
    /* Header en móviles */
    .header {
        padding: 15px;
        margin-bottom: 15px;
    }
    
    .navbar {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    .navbar-nav {
        flex-direction: column;
        gap: 10px;
        width: 100%;
        z-index: 1001; /* Por encima del contenido */
    }
    
    .nav-item {
        width: 100%;
    }
    
    /* Dropdown en móviles */
    .dropdown-menu {
        position: fixed;
        right: 10px;
        top: auto;
        max-width: 90%;
        z-index: 10000; /* Muy alto para móviles */
    }
    
    .container {
        padding: 0 15px;
    }
    
    .row {
        margin: 0 -10px;
    }
    
    .col {
        padding: 0 10px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .card {
        padding: 20px;
    }
}

@media (max-width: 576px) {
    .main-content {
        padding: 15px;
    }
    
    .card {
        padding: 15px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}

/* ========================================
   ESTILOS PARA FÓRMULAS MATEMÁTICAS (MathJax)
   ======================================== */

.math-content {
    /* Asegurar que las fórmulas matemáticas se rendericen correctamente */
    line-height: 1.8;
}

/* Estilos para elementos MathJax */
.MathJax {
    font-size: 1.1em !important;
}

/* Fórmulas inline */
.MathJax_Display {
    margin: 1em 0 !important;
}

/* Mejorar la legibilidad de las fórmulas en preguntas */
.question-text .MathJax,
.option-text .MathJax,
.explanation .MathJax,
.solution-text .MathJax {
    font-size: 1.05em !important;
    color: #2c3e50;
}

/* Estilos específicos para opciones con fórmulas */
.option .math-content {
    display: inline-block;
    vertical-align: top;
}

/* Mejorar el espaciado en explicaciones con fórmulas */
.explanation .math-content,
.solution-text .math-content {
    margin-top: 8px;
    line-height: 1.7;
}

/* Responsive para fórmulas matemáticas */
@media (max-width: 768px) {
    .MathJax {
        font-size: 0.95em !important;
    }
    
    .question-text .MathJax,
    .option-text .MathJax {
        font-size: 1em !important;
    }
}

@media (max-width: 576px) {
    .MathJax {
        font-size: 0.9em !important;
    }
    
    .math-content {
        line-height: 1.6;
    }
}