/* --- ESTÉTICA PREMIUM --- */
:root {
    --bg-body: #ffffff;
    --text-primary: #0F172A;
    --text-secondary: #64748B;
    --erya-blue: #005eb8;
    --erya-green: #00a651;
    --erya-gradient: linear-gradient(135deg, var(--erya-blue) 0%, var(--erya-green) 100%);
    --font-title: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --ease-smooth: cubic-bezier(0.2, 0.8, 0.2, 1);
    --shadow-soft: 0 10px 40px -10px rgba(0, 94, 184, 0.15);
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-body);
    color: var(--text-primary);
    margin: 0; padding: 0; overflow-x: hidden;
}

/* --- NAV --- */
nav {
    position: fixed; top: 0; width: 100%; padding: 20px 0; z-index: 100;
    background: rgba(255,255,255,0.9); backdrop-filter: blur(15px);
    display: flex; justify-content: space-between; align-items: center;
    border-bottom: 1px solid rgba(0,0,0,0.03);
}

.logo-nav { margin-left: 5%; }
.nav-links { display: flex; gap: 40px; }

.nav-links a {
    text-decoration: none; color: var(--text-primary);
    font-weight: 600; font-size: 0.95rem; position: relative; transition: color 0.3s;
}

.nav-links a:hover, .nav-links a.active { color: var(--erya-blue); }

.nav-links a::after {
    content: ''; position: absolute; width: 0; height: 2px;
    bottom: -5px; left: 0; background: var(--erya-gradient); transition: width 0.3s;
}

.nav-links a.active::after, .nav-links a:hover::after { width: 100%; }

.lang-switch { margin-right: 5%; display: flex; gap: 15px; }
.lang-btn {
    background: none; border: none; cursor: pointer;
    font-family: var(--font-title); font-size: 0.85rem; color: var(--text-secondary);
    font-weight: 600; padding: 5px 12px; border-radius: 20px; transition: all 0.3s;
}
.lang-btn.active { background: var(--erya-gradient); color: white; }

/* --- HERO --- */
.hero {
    min-height: 80vh; 
    display: flex; flex-direction: column; justify-content: center;
    align-items: center; text-align: center; padding-top: 60px;
}
.erya-main-logo { width: 180px; filter: drop-shadow(0 10px 20px rgba(0,166,81,0.2)); margin-bottom: 15px; }
.hero h1 {
    font-size: clamp(3rem, 10vw, 6rem); font-weight: 800; margin: 0;
    background: var(--erya-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.slogan-main { letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-secondary); font-size: 0.9rem; margin-top: 10px; }

/* --- CONTENT & VIDEO POSITION --- */
.content-container { 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 0 20px 50px 20px; 
    opacity: 0; 
    transform: translateY(30px); 
    transition: all 1s var(--ease-smooth); 
}
.content-container.visible { opacity: 1; transform: translateY(0); }

.video-card.shifted-up { 
    margin-top: -120px;
    position: relative;
    z-index: 10;
    height: 500px; 
    padding: 0; 
    overflow: hidden; 
    border-radius: 25px; 
    background: white;
    box-shadow: var(--shadow-soft);
}
.video-player { width: 100%; height: 100%; object-fit: cover; }

/* --- CARRUSEL PATROCINADORES --- */
.partners-section {
    padding: 100px 0 60px 0;
    text-align: center;
}

.partners-title {
    font-family: var(--font-title);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.carousel-viewport {
    width: 100%;
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}

.partners-carousel {
    display: inline-flex;
    align-items: center;
    gap: 100px;
    width: max-content;
    /* Variables que controlan el desplazamiento y la duración desde JS */
    --scroll-width: 50%; /* valor por defecto (se sobrescribe desde JS) */
    --scroll-duration: 30s; /* valor por defecto (se sobrescribe desde JS) */
    /* Animación lineal infinita */
    animation: scrollInfinite var(--scroll-duration) linear infinite;
    will-change: transform;
}

/* Cuando el JS controla el movimiento, desactivamos la animación CSS para evitar conflictos */
.partners-carousel.js-control {
    animation: none !important;
}

/* Pausa al hacer hover */
.partners-carousel:hover {
    animation-play-state: paused;
}

.partner-link {
    display: block;
    /* Eliminados los filtros grises: logos a color original */
    filter: none;
    opacity: 1;
    transition: transform 0.4s var(--ease-smooth);
    flex-shrink: 0;
}

.partner-link img {
    height: 45px;
    width: auto;
    display: block;
}

.partner-link:hover {
    transform: scale(1.1);
}

/* Definición de la espiral infinita */
@keyframes scrollInfinite {
    0% {
        transform: translateX(0);
    }
    100% {
        /* Se desplaza exactamente la distancia calculada en JS para un bucle continuo */
        transform: translateX(calc(var(--scroll-width) * -1));
    }
}

/* --- FOOTER --- */
footer { text-align: center; color: var(--text-secondary); padding: 40px 0; border-top: 1px solid #eee; margin-top: 50px; font-size: 0.85rem; }

/* --- RESPONSIVE --- */
@media (max-width: 768px) { 
    .nav-links { display: none; } 
    .hero h1 { font-size: 3.5rem; } 
    .video-card.shifted-up { height: 280px; margin-top: -60px; } 
    .partners-carousel { gap: 60px; }
    .partner-link img { height: 30px; }
}