/* Variables de color */
:root {
    --primary-color: #0d6efd;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

/* Body */
body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Navbar */
.navbar {
    background: linear-gradient(90deg, #0d6efd 0%, #0dcaf0 100%) !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.bg-gradient {
    background: linear-gradient(90deg, #0d6efd 0%, #0dcaf0 100%);
}

/* Card Styles */
.card {
    transition: all 0.3s ease;
    border-radius: 12px;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15) !important;
}

.card-header {
    border-radius: 12px 12px 0 0;
    padding: 1.25rem;
    font-weight: 600;
    border-bottom: 0;
}

.card-body {
    padding: 1.5rem;
}

/* Item Card Styles */
.item-card {
    border-left: 5px solid var(--primary-color);
    margin-bottom: 20px;
}

.item-card.facil {
    border-left-color: var(--success-color);
}

.item-card.media {
    border-left-color: var(--warning-color);
}

.item-card.alta {
    border-left-color: var(--danger-color);
}

/* Badge de dificultad */
.badge-dificultad {
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    border-radius: 20px;
}

.badge-facil {
    background-color: #d4edda;
    color: #155724;
}

.badge-media {
    background-color: #fff3cd;
    color: #856404;
}

.badge-alta {
    background-color: #f8d7da;
    color: #721c24;
}

/* Sección de opciones */
.opciones-section {
    background-color: #f8f9fa;
    border-radius: 10px;
    padding: 1rem;
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
}

.opcion {
    padding: 0.75rem 1rem;
    margin-bottom: 0.75rem;
    background-color: white;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.opcion:hover {
    border-color: var(--primary-color);
    background-color: #f0f6ff;
}

.opcion-letra {
    font-weight: 700;
    color: var(--primary-color);
    min-width: 30px;
    display: inline-block;
}

.opcion-correcta {
    border-left: 4px solid var(--success-color);
    background-color: #f0fff4;
}

.opcion-correcta .opcion-letra {
    color: var(--success-color);
}

/* Etiquetas y tags */
.tag {
    display: inline-block;
    background-color: #e7f3ff;
    color: var(--primary-color);
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

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

/* JSON Section */
#jsonOutput {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    overflow-x: auto;
}

#jsonCode {
    color: #000;
}

/* Botones */
.btn {
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 0;
}

.btn-primary {
    background: linear-gradient(90deg, #0d6efd 0%, #0dcaf0 100%);
}

.btn-primary:hover {
    background: linear-gradient(90deg, #0b5ed7 0%, #0aaad5 100%);
    transform: translateY(-2px);
}

.btn-outline-secondary {
    border: 2px solid #6c757d;
}

.btn-outline-secondary:hover {
    background-color: #6c757d;
    border-color: #6c757d;
}

/* Form Controls */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #dee2e6;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Spinner */
.spinner-border {
    width: 50px;
    height: 50px;
}

/* Alert */
.alert {
    border-radius: 10px;
    border: 0;
}

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

/* Loader */
#loader {
    animation: fadeIn 0.3s ease;
}

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

/* Toast */
.toast {
    border-radius: 8px;
    border: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Status Badge */
#statusBadge {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
}

/* Contexto y Pregunta */
.contexto-box {
    background-color: #e7f3ff;
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.pregunta-box {
    background-color: #fff3cd;
    border-left: 4px solid var(--warning-color);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-weight: 600;
    font-size: 1.05rem;
}

.justificacion-box {
    background-color: #d4edda;
    border-left: 4px solid var(--success-color);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

/* Sticky Form */
@media (max-width: 991px) {
    .sticky-top {
        position: static !important;
        margin-bottom: 20px;
    }
}

/* Animación de carga */
.fade.d-none {
    display: none !important;
}

/* Sección de área específica */
.area-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.area-mat {
    background-color: #e3f2fd;
    color: #1565c0;
}

.area-lc {
    background-color: #f3e5f5;
    color: #6a1b9a;
}

.area-cn {
    background-color: #e0f2f1;
    color: #00695c;
}

.area-soc {
    background-color: #fff3e0;
    color: #e65100;
}

.area-ing {
    background-color: #fce4ec;
    color: #c2185b;
}

/* Responsive */
@media (max-width: 768px) {
    .container-fluid {
        padding: 1rem;
    }

    .card-header {
        padding: 1rem;
    }

    .card-body {
        padding: 1rem;
    }

    #jsonOutput {
        font-size: 0.8rem;
        max-height: 300px !important;
    }
}

/* Print Styles */
@media print {
    .navbar, #generatorForm, #copyJsonBtn {
        display: none !important;
    }

    .card {
        page-break-inside: avoid;
    }
}