/* --- VARIABLES Y CONFIGURACIÓN GENERAL --- */
:root {
    --color-primario: #0b2545;
    --color-primario-oscuro: #06172e;
    --color-secundario: #c0392b;
    --color-fondo: #f4f6f9;
    --color-texto: #1e293b;
    --color-blanco: #ffffff;
    --border-color: #cbd5e1;
    
    /* Categorías de Eventos */
    --cat-academico: #1d4ed8;
    --cat-feria: #6d28d9;
    --cat-examen: #be123c;
    --cat-institucional: #15803d;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    line-height: 1.5;
    background-color: var(--color-fondo);
    color: var(--color-texto);
}

.oculto {
    display: none !important;
}

/* --- PANTALLA INICIAL DE SELECCIÓN --- */
.pantalla-inicio {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-primario) 0%, var(--color-primario-oscuro) 100%);
}

.tarjeta-bienvenida {
    background: var(--color-blanco);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    max-width: 420px;
    width: 90%;
}

.tarjeta-bienvenida h1 {
    color: var(--color-primario);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.opciones-inicio {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-top: 1.5rem;
}

.btn-inicio {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0.85rem;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-inicio.público {
    background-color: var(--cat-academico);
    color: white;
}

.btn-inicio.admin {
    background-color: var(--color-primario);
    color: white;
}

/* --- MODAL LOGIN Y DETALLES --- */
.modal-login {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 37, 69, 0.7);
    backdrop-filter: blur(3px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-contenido {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    position: relative;
    max-width: 380px;
    width: 90%;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.btn-cerrar {
    position: absolute;
    top: 10px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #888;
}

.modal-contenido input, .modal-contenido textarea {
    width: 100%;
    padding: 0.75rem;
    margin: 1rem 0;
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

.error {
    color: var(--cat-examen);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.modal-detalle {
    max-width: 480px;
    padding: 0;
    overflow: hidden;
    text-align: left;
    border-radius: 8px;
}

.detalle-header-img {
    width: 100%;
    height: 200px;
    background-color: #eee;
}

.detalle-header-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.detalle-cuerpo {
    padding: 1.25rem;
}

.detalle-fecha {
    color: #64748b;
    margin: 0.4rem 0 0.8rem 0;
    font-size: 0.9rem;
}

.detalle-descripcion {
    color: #334155;
    line-height: 1.5;
    background: #f8fafc;
    padding: 0.85rem;
    border-left: 3px solid var(--color-primario);
    border-radius: 4px;
    font-size: 0.9rem;
}

/* --- HEADER Y NAVEGACIÓN COMPACTO Y FORMAL --- */
.header-principal {
    background-color: var(--color-primario);
    color: var(--color-blanco);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.header-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1.5rem;
}

.logo-institucional h2 {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.1;
}

.logo-institucional span {
    font-size: 0.72rem;
    opacity: 0.8;
    display: block;
}

.navegacion-principal {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.navegacion-principal a {
    color: var(--color-blanco);
    text-decoration: none;
    padding: 0.45rem 0.85rem;
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: 4px;
    transition: background 0.2s;
}

.navegacion-principal a:hover {
    background-color: rgba(255, 255, 255, 0.12);
}

.link-salir {
    background-color: var(--color-secundario);
    margin-left: 0.5rem;
}

.link-salir:hover {
    background-color: #a93226 !important;
}

/* --- PORTADA HERO MUCHO MÁS GRANDE --- */
.hero-section {
    position: relative;
    width: 100%;
    height: 85vh; /* Ocupa el 85% de la altura visible de la pantalla */
    min-height: 550px;
    background-image: url('img/portada.jpg'), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?w=1600&q=80');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* Overlay sutil para acabado formal */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 37, 69, 0.12);
}

/* Responsividad para Header y Portada */
@media (max-width: 850px) {
    .header-container {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0.6rem 1rem;
    }
    
    .hero-section {
        height: 50vh;
        min-height: 300px;
    }
}

/* --- CALENDARIO COMPLETO DINÁMICO --- */
.seccion-calendario {
    max-width: 1300px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.titulo-calendario {
    text-align: center;
    color: var(--color-primario);
    font-size: 1.3rem;
    margin-bottom: 1.25rem;
}

.grid-meses {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.mes-card {
    background: var(--color-blanco);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.mes-header-img {
    height: 90px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.mes-header-img h3 {
    position: absolute;
    bottom: 8px;
    left: 12px;
    color: var(--color-blanco);
    background: rgba(11, 37, 69, 0.88);
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 0.9rem;
}

.dias-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    padding: 0.75rem;
    text-align: center;
}

.dia-semana-header {
    font-weight: 700;
    font-size: 0.75rem;
    color: #64748b;
    padding-bottom: 4px;
}

.dia {
    padding: 6px 0;
    border-radius: 3px;
    background-color: #f8fafc;
    font-size: 0.82rem;
}

.dia.vacio {
    background-color: transparent;
}

.dia.evento-academico,
.dia.evento-feria,
.dia.evento-examen,
.dia.evento-institucional {
    cursor: pointer;
    transition: transform 0.15s ease;
}

.dia.evento-academico:hover,
.dia.evento-feria:hover,
.dia.evento-examen:hover,
.dia.evento-institucional:hover {
    transform: scale(1.15);
    z-index: 5;
}

.dia.evento-academico { background-color: var(--cat-academico); color: white; font-weight: 600; }
.dia.evento-feria { background-color: var(--cat-feria); color: white; font-weight: 600; }
.dia.evento-examen { background-color: var(--cat-examen); color: white; font-weight: 600; }
.dia.evento-institucional { background-color: var(--cat-institucional); color: white; font-weight: 600; }

/* --- GESTIÓN / FORMULARIO --- */
.seccion-gestion {
    max-width: 750px;
    margin: 2rem auto;
    background: var(--color-blanco);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.seccion-gestion h2 {
    font-size: 1.2rem;
    color: var(--color-primario);
}

.formulario-evento {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
    margin-top: 1rem;
}

.formulario-evento .campo {
    display: flex;
    flex-direction: column;
    font-size: 0.85rem;
}

.formulario-evento .campo:nth-child(1),
.formulario-evento .campo:nth-child(4),
.formulario-evento .campo:nth-child(5) {
    grid-column: span 2;
}

.formulario-evento input, .formulario-evento select, .formulario-evento textarea {
    padding: 0.55rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-top: 0.25rem;
    font-size: 0.88rem;
}

/* --- TARJETAS DE EVENTOS --- */
.seccion-eventos {
    max-width: 1300px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.seccion-eventos h2 {
    font-size: 1.3rem;
    color: var(--color-primario);
}

.tarjetas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    margin-top: 1rem;
}

.card {
    background: var(--color-blanco);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.card-img-wrapper img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.card-body {
    padding: 1rem;
}

.card-body h3 {
    font-size: 1rem;
    color: var(--color-primario);
    margin-bottom: 0.25rem;
}

.card-body p {
    font-size: 0.82rem;
    color: #64748b;
}

.badge {
    display: inline-block;
    padding: 2px 7px;
    font-size: 0.7rem;
    border-radius: 4px;
    color: white;
    margin-bottom: 0.4rem;
    font-weight: 700;
}

.badge.academico { background-color: var(--cat-academico); }
.badge.feria { background-color: var(--cat-feria); }
.badge.examen { background-color: var(--cat-examen); }
.badge.institucional { background-color: var(--cat-institucional); }

.btn-primario {
    background-color: var(--color-primario);
    color: var(--color-blanco);
    border: none;
    padding: 0.6rem 1.2rem;
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-primario:hover {
    background-color: var(--color-primario-oscuro);
}

/* --- CONTACTO & FOOTER --- */
.seccion-contacto {
    background-color: #e2e8f0;
    text-align: center;
    padding: 1.5rem 1rem;
    font-size: 0.9rem;
}

footer {
    background-color: var(--color-primario);
    color: var(--color-blanco);
    text-align: center;
    padding: 1rem;
    font-size: 0.85rem;
}