/**
 * SIGA - Sistema de Gestión de Autoaprendizaje
 * Estilos Principales - Diseño Universitario
 */

/* =====================================================
   VARIABLES Y CONFIGURACIÓN
   ===================================================== */
:root {
    /* Colores universitarios */
    --primary: #1e3a5f;
    --primary-dark: #0f1f33;
    --primary-light: #2d5a8a;
    --secondary: #c9a227;
    --secondary-dark: #a68520;
    --secondary-light: #e0b82d;
    
    /* Colores de estado */
    --success: #198754;
    --info: #0dcaf0;
    --warning: #ffc107;
    --danger: #dc3545;
    
    /* Colores neutros */
    --white: #ffffff;
    --light: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --dark: #212529;
    
    /* Tipografía */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-secondary: 'Merriweather', Georgia, serif;
    
    /* Espaciado */
    --sidebar-width: 280px;
    --sidebar-collapsed: 70px;
    --header-height: 65px;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    
    /* Bordes */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transiciones */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--gray-100);
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--primary-light);
}

img {
    max-width: 100%;
    height: auto;
}

/* =====================================================
   LAYOUT PRINCIPAL
   ===================================================== */
.wrapper {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content.expanded {
    margin-left: var(--sidebar-collapsed);
}

.content-wrapper {
    flex: 1;
    padding: 25px;
    margin-top: var(--header-height);
}

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

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    min-height: 80px;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-logo img {
    width: 45px;
    height: 45px;
    border-radius: var(--radius);
}

.sidebar-logo-text {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.sidebar-logo-text span {
    display: block;
    font-size: 0.7rem;
    font-weight: 400;
    opacity: 0.7;
    letter-spacing: 1px;
}

.sidebar.collapsed .sidebar-logo-text {
    display: none;
}

.sidebar-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--white);
    width: 35px;
    height: 35px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition-fast);
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.sidebar.collapsed .sidebar-toggle {
    transform: rotate(180deg);
}

/* Menú del Sidebar */
.sidebar-menu {
    padding: 15px 0;
}

.menu-section {
    padding: 10px 20px 5px;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: rgba(255, 255, 255, 0.5);
    white-space: nowrap;
}

.sidebar.collapsed .menu-section {
    text-align: center;
    padding: 10px 5px 5px;
}

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

.nav-item {
    margin: 2px 10px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    color: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius);
    transition: var(--transition-fast);
    gap: 12px;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.nav-link.active {
    background: var(--secondary);
    color: var(--primary-dark);
    font-weight: 600;
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.nav-link span {
    white-space: nowrap;
}

.sidebar.collapsed .nav-link span {
    display: none;
}

.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 12px;
}

/* Perfil en Sidebar */
.sidebar-profile {
    padding: 15px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
}

.profile-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.profile-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    color: var(--primary-dark);
    flex-shrink: 0;
}

.profile-details {
    overflow: hidden;
}

.profile-name {
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-role {
    font-size: 0.75rem;
    opacity: 0.7;
    text-transform: capitalize;
}

.sidebar.collapsed .profile-details {
    display: none;
}

/* =====================================================
   HEADER
   ===================================================== */
.header {
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    height: var(--header-height);
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 25px;
    transition: var(--transition);
}

.header.expanded {
    left: var(--sidebar-collapsed);
}

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

.header-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--gray-600);
    margin: 0;
    padding: 0;
    background: none;
}

.breadcrumb-item a {
    color: var(--gray-600);
}

.breadcrumb-item a:hover {
    color: var(--primary);
}

.breadcrumb-item.active {
    color: var(--primary);
    font-weight: 500;
}

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

.header-icon {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition-fast);
}

.header-icon:hover {
    background: var(--gray-200);
    color: var(--primary);
}

.header-icon .badge {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 18px;
    height: 18px;
    background: var(--danger);
    color: var(--white);
    border-radius: 50%;
    font-size: 0.65rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* =====================================================
   CARDS
   ===================================================== */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: none;
    margin-bottom: 25px;
    overflow: hidden;
}

.card-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 18px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title i {
    color: var(--secondary);
}

.card-body {
    padding: 22px;
}

.card-footer {
    background: var(--gray-100);
    border-top: 1px solid var(--gray-200);
    padding: 15px 22px;
}

/* Card Stats */
.stat-card {
    padding: 25px;
    border-radius: var(--radius-lg);
    background: var(--white);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.primary {
    background: rgba(30, 58, 95, 0.1);
    color: var(--primary);
}

.stat-icon.secondary {
    background: rgba(201, 162, 39, 0.15);
    color: var(--secondary-dark);
}

.stat-icon.success {
    background: rgba(25, 135, 84, 0.1);
    color: var(--success);
}

.stat-icon.danger {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger);
}

.stat-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 2px;
}

.stat-info p {
    color: var(--gray-600);
    margin: 0;
    font-size: 0.9rem;
}

/* =====================================================
   TABLAS
   ===================================================== */
.table {
    margin-bottom: 0;
}

.table thead th {
    background: var(--gray-100);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 14px 15px;
    border: none;
    white-space: nowrap;
}

.table tbody td {
    padding: 14px 15px;
    vertical-align: middle;
    border-color: var(--gray-200);
}

.table tbody tr:hover {
    background: var(--gray-100);
}

.table-striped tbody tr:nth-of-type(odd) {
    background: rgba(30, 58, 95, 0.02);
}

/* =====================================================
   BOTONES
   ===================================================== */
.btn {
    font-weight: 500;
    padding: 10px 20px;
    border-radius: var(--radius);
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-light);
    border-color: var(--primary-light);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--secondary);
    border-color: var(--secondary);
    color: var(--primary-dark);
}

.btn-secondary:hover {
    background: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: var(--white);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
}

/* =====================================================
   FORMULARIOS
   ===================================================== */
.form-control, .form-select {
    padding: 10px 15px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-300);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.form-label {
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-text {
    font-size: 0.8rem;
    color: var(--gray-600);
}

.input-group-text {
    background: var(--gray-100);
    border-color: var(--gray-300);
    color: var(--gray-600);
}

/* =====================================================
   BADGES
   ===================================================== */
.badge {
    font-weight: 500;
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.badge-primary {
    background: var(--primary);
}

.badge-secondary {
    background: var(--secondary);
    color: var(--primary-dark);
}

/* =====================================================
   ALERTAS
   ===================================================== */
.alert {
    border: none;
    border-radius: var(--radius);
    padding: 15px 20px;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(25, 135, 84, 0.1);
    border-left-color: var(--success);
    color: var(--success);
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    border-left-color: var(--danger);
    color: var(--danger);
}

.alert-warning {
    background: rgba(255, 193, 7, 0.15);
    border-left-color: var(--warning);
    color: #856404;
}

.alert-info {
    background: rgba(13, 202, 240, 0.1);
    border-left-color: var(--info);
    color: #0c5460;
}

/* =====================================================
   PROGRESO
   ===================================================== */
.progress {
    height: 8px;
    border-radius: 4px;
    background: var(--gray-200);
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    transition: width 0.5s ease;
}

/* =====================================================
   CURSOS
   ===================================================== */
.course-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.course-image {
    height: 160px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    position: relative;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-badge {
    position: absolute;
    top: 12px;
    right: 12px;
}

.course-content {
    padding: 20px;
}

.course-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.course-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--gray-600);
    margin-bottom: 15px;
}

.course-meta i {
    color: var(--secondary);
}

.course-progress {
    margin-top: 15px;
}

.course-progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    margin-bottom: 5px;
    color: var(--gray-600);
}

/* =====================================================
   LOGIN
   ===================================================== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 20px;
}

.login-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    max-width: 450px;
    width: 100%;
}

.login-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 40px 30px;
    text-align: center;
    color: var(--white);
}

.login-logo {
    width: 80px;
    height: 80px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.login-logo img {
    width: 50px;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.login-header p {
    opacity: 0.8;
    font-size: 0.9rem;
}

.login-body {
    padding: 40px 30px;
}

.login-footer {
    text-align: center;
    padding: 20px 30px;
    background: var(--gray-100);
    font-size: 0.85rem;
    color: var(--gray-600);
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .header {
        left: 0;
    }
    
    .mobile-toggle {
        display: block !important;
    }
}

@media (max-width: 768px) {
    .content-wrapper {
        padding: 15px;
    }
    
    .stat-card {
        padding: 20px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .table-responsive {
        font-size: 0.85rem;
    }
}

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

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

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }

.mobile-toggle {
    display: none;
}

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

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

/* Scrollbar personalizado */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-200);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}