/* Campus Virtual BUSF - Estilos principales */

:root {
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --accent-color: #fbbf24;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --dark-color: #1f2937;
    --light-color: #f8fafc;
    --border-color: #e5e7eb;
}

/* Configuración general */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .navbar-brand {
    font-weight: bold;
    font-size: 1.4rem;
    color: white !important;
}

.header .navbar-nav .nav-link {
    color: rgba(255,255,255,0.9) !important;
    font-weight: 500;
    transition: color 0.3s ease;
}

.header .navbar-nav .nav-link:hover {
    color: var(--accent-color) !important;
}

/* Sidebar */
.sidebar {
    background: white;
    min-height: calc(100vh - 76px);
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    border-right: 1px solid var(--border-color);
}

.sidebar .nav-link {
    color: var(--dark-color);
    padding: 12px 20px;
    border-radius: 8px;
    margin: 2px 8px;
    transition: all 0.3s ease;
}

.sidebar .nav-link:hover {
    background-color: var(--light-color);
    color: var(--secondary-color);
    transform: translateX(5px);
}

.sidebar .nav-link.active {
    background-color: var(--secondary-color);
    color: white;
}

.sidebar .nav-link i {
    width: 20px;
    margin-right: 10px;
}

/* Cards */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    font-weight: 600;
}

.card-curso {
    transition: all 0.3s ease;
}

.card-curso:hover {
    transform: scale(1.02);
}

.card-curso img {
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.card-curso:hover img {
    transform: scale(1.1);
}

/* Buttons */
.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 10px 20px;
    transition: all 0.3s ease;
    border: none;
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

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

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

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

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

/* Forms */
.form-control {
    border-radius: 8px;
    border: 2px solid var(--border-color);
    padding: 12px 15px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 8px;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
}

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

.login-header h2 {
    font-weight: bold;
    margin-bottom: 10px;
}

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

/* Dashboard Cards */
.stat-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.stat-card .stat-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
}

.stat-card .stat-number {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-card .stat-label {
    color: #6b7280;
    font-weight: 500;
}

.stat-card.primary .stat-icon { color: var(--primary-color); }
.stat-card.success .stat-icon { color: var(--success-color); }
.stat-card.warning .stat-icon { color: var(--warning-color); }
.stat-card.info .stat-icon { color: var(--info-color); }

/* Tables */
.table {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
}

.table thead th {
    background-color: var(--light-color);
    border: none;
    font-weight: 600;
    color: var(--dark-color);
    padding: 15px;
}

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

.table tbody tr:hover {
    background-color: rgba(59, 130, 246, 0.05);
}

/* Badges */
.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 500;
}

.badge.bg-success { background-color: var(--success-color) !important; }
.badge.bg-warning { background-color: var(--warning-color) !important; }
.badge.bg-danger { background-color: var(--danger-color) !important; }
.badge.bg-info { background-color: var(--info-color) !important; }
.badge.bg-primary { background-color: var(--primary-color) !important; }

/* Alerts */
.alert {
    border: none;
    border-radius: 12px;
    padding: 15px 20px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--info-color);
    border-left: 4px solid var(--info-color);
}

/* Progress bars */
.progress {
    height: 8px;
    border-radius: 10px;
    background-color: var(--border-color);
}

.progress-bar {
    border-radius: 10px;
    background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
}

/* Certificates */
.certificate-preview {
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    background: white;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
}

.qr-code {
    display: inline-block;
    padding: 10px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

/* File upload */
.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-upload-area:hover {
    border-color: var(--secondary-color);
    background-color: rgba(59, 130, 246, 0.05);
}

.file-upload-area.dragover {
    border-color: var(--secondary-color);
    background-color: rgba(59, 130, 246, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        min-height: auto;
    }
    
    .card-curso img {
        height: 150px;
    }
    
    .stat-card {
        padding: 20px 15px;
    }
    
    .stat-card .stat-icon {
        font-size: 2rem;
    }
    
    .stat-card .stat-number {
        font-size: 1.5rem;
    }
    
    .login-body {
        padding: 30px 20px;
    }
    
    .table-responsive {
        border-radius: 12px;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding-left: 10px;
        padding-right: 10px;
    }
    
    .card {
        margin-bottom: 20px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

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

.shadow-sm { box-shadow: 0 2px 4px rgba(0,0,0,0.05) !important; }
.shadow { box-shadow: 0 4px 6px rgba(0,0,0,0.07) !important; }
.shadow-lg { box-shadow: 0 8px 25px rgba(0,0,0,0.15) !important; }

.rounded-lg { border-radius: 12px !important; }
.rounded-xl { border-radius: 16px !important; }
.rounded-2xl { border-radius: 20px !important; }

/* Reportes: ocultar controles al imprimir / exportar PDF */
@media print {
    .no-print { display: none !important; }
    .sidebar, .header, .navbar { display: none !important; }
    main { width: 100% !important; max-width: 100% !important; margin: 0 !important; padding: 0 !important; }
    .card { break-inside: avoid; box-shadow: none !important; border: 1px solid #ddd !important; }
    body { background: #fff !important; }
    .d-print-block { display: block !important; }
}