/* --- VARIABLES Y CONFIGURACIÓN GENERAL --- */
:root {
    --color-principal: #2c3e50;
    --color-secundario: #3498db;
    --color-fondo: #f8f9fa;
    --color-texto: #333333;
    --color-blanco: #ffffff;
    --color-borde: #e2e8f0;
    --fuente-base: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
    background-color: var(--color-fondo);
    color: var(--color-texto);
    font-family: var(--fuente-base);
    line-height: 1.6;
}

/* --- CABECERA Y MENÚ INTEGRADO --- */
.main-header {
    background-color: var(--color-principal);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-list {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    list-style: none;
    margin: 0 auto;
    max-width: 1200px;
}

.logo-item {
    display: flex;
    align-items: center;
    padding: 0 1rem;
}

.logo-item img {
    border: 2px solid var(--color-blanco);
    border-radius: 50%;
    display: block;
    transition: transform 0.3s ease;
}

.logo-item img:hover {
    transform: scale(1.1);
}

.nav-list a {
    color: var(--color-blanco);
    display: block;
    font-size: 1rem;
    font-weight: 600;
    padding: 1.2rem 1.5rem;
    text-decoration: none;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

.nav-list a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-secundario);
}

.nav-list a.active {
    border-bottom: 4px solid var(--color-secundario);
    color: var(--color-secundario);
}

/* --- CONTENIDO PRINCIPAL --- */
.content-container {
    margin: 3rem auto;
    max-width: 900px;
    padding: 0 1.5rem;
}

.section-block {
    background-color: var(--color-blanco);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 2.5rem;
    padding: 2.5rem;
}

.section-title {
    color: var(--color-principal);
    font-size: 1.8rem;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.section-title::after {
    background-color: var(--color-secundario);
    bottom: 0;
    content: '';
    height: 3px;
    left: 0;
    position: absolute;
    width: 60px;
}

/* --- CARRUSEL DE FOTOS (SIN TRANSICIÓN) --- */
.slide {
    display: block;
    margin: 0 auto;
    max-width: 600px;
    position: relative;
    width: 100%;
}

.slide-inner {
    border-radius: 8px;
    height: 0;
    overflow: hidden;
    padding-bottom: 66.66%;
    position: relative;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.slide-item {
    display: none; /* Oculta las fotos por defecto */
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1;
}

.slide-item img {
    display: block;
    height: 100%;
    object-fit: cover;
    width: 100%;
}

/* Muestra la foto de golpe al estar seleccionada */
.slide-open:checked + .slide-item {
    display: block; 
    z-index: 2;
}

/* Controles de flecha */
.slide-control {
    background: rgba(0, 0, 0, 0.4);
    border-radius: 50%;
    color: var(--color-blanco);
    cursor: pointer;
    display: none;
    font-size: 30px;
    height: 40px;
    line-height: 35px;
    position: absolute;
    text-align: center;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    z-index: 10;
    user-select: none;
}

.slide-control:hover {
    background: var(--color-secundario);
}

.slide-control.prev {
    left: 15px;
}

.slide-control.next {
    right: 15px;
}

#slide-1:checked ~ .control-1,
#slide-2:checked ~ .control-2,
#slide-3:checked ~ .control-3,
#slide-4:checked ~ .control-4 {
    display: block;
}

/* Indicadores de puntos */
.slide-indicador {
    bottom: 15px;
    display: flex;
    gap: 8px;
    justify-content: center;
    left: 0;
    list-style: none;
    position: absolute;
    right: 0;
    z-index: 10;
}

.slide-circulo {
    color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    display: block;
    font-size: 35px;
    line-height: 20px;
    transition: color 0.3s ease;
}

.slide-circulo:hover {
    color: var(--color-blanco);
}

#slide-1:checked ~ .slide-indicador li:nth-child(1) .slide-circulo,
#slide-2:checked ~ .slide-indicador li:nth-child(2) .slide-circulo,
#slide-3:checked ~ .slide-indicador li:nth-child(3) .slide-circulo,
#slide-4:checked ~ .slide-indicador li:nth-child(4) .slide-circulo {
    color: var(--color-secundario);
}

/* --- GRID DE VÍDEOS RESPONSIVE --- */
.video-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.video-wrapper {
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    height: 0;
    overflow: hidden;
    padding-bottom: 56.25%;
    position: relative;
}

.video-wrapper iframe {
    height: 100%;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
}

/* --- ADAPTACIÓN A MÓVILES (MENÚ LATERAL) --- */
@media (max-width: 768px) {
    body {
        padding-left: 80px;
    }

    .main-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 80px;
        height: 100vh;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.15);
    }

    .nav-list {
        flex-direction: column;
        justify-content: flex-start;
        padding: 1rem 0;
    }

    .logo-item {
        margin-bottom: 1rem;
        padding: 0;
    }

    .logo-item img {
        width: 45px;
        height: 45px;
    }

    .nav-list a {
        padding: 1rem 0.2rem;
        width: 100%;
        text-align: center;
        font-size: 0.75rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-list a.active {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        border-left: 4px solid var(--color-secundario);
        background-color: rgba(255, 255, 255, 0.05);
    }

    /* Ajustes del contenido multimedia */
    .section-block {
        padding: 1.2rem;
    }

    .video-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
    
    .slide-control {
        font-size: 20px;
        height: 30px;
        line-height: 26px;
        width: 30px;
    }
}