/* ========== VARIABLES ========== */
:root {
    /* Tema claro (resto de la página) */
    --bg-body: #f8fafc;
    --bg-white: #ffffff;
    --bg-card: #ffffff;
    --bg-card-alt: #f1f5f9;
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent: #2563eb;
    --accent-light: #3b82f6;
    --accent-cyan: #0891b2;
    --gradient-accent: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);

    /* Tema oscuro (cabecera, navbar, footer) */
    --dark-bg: #0a0e14;
    --dark-bg-secondary: #111720;
    --dark-card: #161c26;
    --dark-border: #1e2a3a;
    --dark-text-primary: #e8ecf1;
    --dark-text-secondary: #8b95a5;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-card: 0 4px 6px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.06);
    --shadow-card-hover: 0 10px 25px rgba(0,0,0,0.06), 0 4px 8px rgba(0,0,0,0.04);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== RESET & BASE ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    font-family: var(--font-sans);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* ========== UTILIDADES ========== */
.section-label {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent);
    margin-bottom: 16px;
    font-weight: 500;
}
.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.8px;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.2;
}
.section-description {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto 48px;
}

/* ========== SEPARACIÓN DE BLOQUES ========== */
.section-padding {
    padding: 80px 0;
    position: relative;
    z-index: 1;
}
.section-padding-lg {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}
/* Alternancia sutil de fondos y líneas divisorias */
.section-white {
    background-color: #ffffff !important;
}
.section-alt {
    background-color: #f1f5f9 !important;   /* gris claro */
    border-top: 1px solid #e2e8f0 !important;
    border-bottom: 1px solid #e2e8f0 !important;
}

/* ========== NAVBAR (siempre oscura) ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    /* Siempre oscura, sin importar el scroll */
    background: transparent;
    border-bottom: 1px solid transparent;
}
.navbar .navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: #ffffff !important;
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}
.navbar .navbar-brand img {
    height: 44px;
    transition: var(--transition);
}
.navbar .nav-link {
    color: rgba(255,255,255,0.85) !important;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 8px 16px !important;
    border-radius: 8px;
    transition: var(--transition);
    letter-spacing: -0.1px;
}
.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: #ffffff !important;
    background: rgba(255,255,255,0.1);
}
.navbar-toggler {
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    color: #ffffff;
}
.navbar-toggler:focus {
    box-shadow: 0 0 0 2px rgba(255,255,255,0.2);
}
.dropdown-menu {
    background: rgba(10,14,20,0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    padding: 8px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.5);
    margin-top: 10px;
}
.dropdown-item {
    color: var(--dark-text-secondary);
    border-radius: 8px;
    padding: 10px 16px;
    font-size: 0.88rem;
    transition: var(--transition);
}
.dropdown-item:hover {
    background: rgba(255,255,255,0.05);
    color: #ffffff;
}
.dropdown-item i {
    width: 20px;
    margin-right: 8px;
    color: var(--accent-light);
    font-size: 0.8rem;
}

/* Navbar al hacer scroll (siempre oscura pero con fondo sólido) */
.navbar.scrolled {
    background: rgba(10,14,20,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--dark-border);
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    padding: 12px 0;
}
.navbar.scrolled .navbar-brand {
    color: #ffffff !important;
}
.navbar.scrolled .nav-link {
    color: rgba(255,255,255,0.85) !important;
}
.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
    color: #ffffff !important;
    background: rgba(255,255,255,0.1);
}
.navbar.scrolled .navbar-toggler {
    border-color: rgba(255,255,255,0.3);
    color: #ffffff;
}
.navbar.scrolled .dropdown-menu {
    background: rgba(10,14,20,0.95);
    border: 1px solid var(--dark-border);
}
.navbar.scrolled .dropdown-item {
    color: var(--dark-text-secondary);
}
.navbar.scrolled .dropdown-item:hover {
    background: rgba(255,255,255,0.05);
    color: #ffffff;
}
.navbar.scrolled .navbar-brand img {
    height: 38px;
}

/* ========== HERO (exactamente el tono oscuro del primer diseño) ========== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    /* Fondo con imagen + capa oscura semitransparente */
    background: linear-gradient(rgba(10,14,20,0.75), rgba(10,14,20,0.75)),
                url('assets/img/cabecera1.jpg') center/cover no-repeat;
    overflow: hidden;
    padding-top: 100px;
}
.hero-bg-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 600px;
    background: radial-gradient(ellipse at center, rgba(59,130,246,0.12) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    animation: float-glow 8s ease-in-out infinite;
}
.hero-bg-glow-2 {
    position: absolute;
    bottom: -150px;
    right: -20%;
    width: 600px;
    height: 500px;
    background: radial-gradient(ellipse at center, rgba(6,182,212,0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    animation: float-glow 10s ease-in-out infinite reverse;
}
.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(30,42,58,0.15) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30,42,58,0.15) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at 50% 0%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at 50% 0%, black 30%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}
@keyframes float-glow {
    0%,100% { transform: translate(0,0) scale(1); }
    33% { transform: translate(20px,-20px) scale(1.05); }
    66% { transform: translate(-15px,15px) scale(0.95); }
}
.hero-content {
    position: relative;
    z-index: 2;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(37,99,235,0.12);
    border: 1px solid rgba(37,99,235,0.25);
    border-radius: 50px;
    padding: 8px 18px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-light);
    margin-bottom: 28px;
}
.badge-dot {
    width: 7px;
    height: 7px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
    0%,100% { box-shadow: 0 0 0 0 rgba(37,99,235,0.6); }
    50% { box-shadow: 0 0 0 10px rgba(37,99,235,0); }
}
.hero-title {
    font-size: clamp(2.5rem, 5.5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: #ffffff;
}
.gradient-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: 1.15rem;
    color: var(--dark-text-secondary);
    max-width: 520px;
    margin-bottom: 32px;
}
.btn-primary-glow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--gradient-accent);
    color: #fff;
    font-weight: 600;
    padding: 14px 28px;
    border-radius: 50px;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(37,99,235,0.4);
}
.btn-primary-glow:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(37,99,235,0.6);
    color: #fff;
}
.btn-outline-glow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: #ffffff;
    font-weight: 500;
    padding: 14px 28px;
    border-radius: 50px;
    border: 1px solid var(--dark-border);
    text-decoration: none;
    transition: var(--transition);
}
.btn-outline-glow:hover {
    border-color: var(--accent-light);
    background: rgba(37,99,235,0.1);
    color: #ffffff;
}
.hero-floating-card {
    position: absolute;
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    transition: var(--transition);
}
.hero-floating-card.card-1 { top:5%; left:5%; width:65%; z-index:3; animation: float-card 6s ease-in-out infinite; }
.hero-floating-card.card-2 { bottom:5%; right:5%; width:55%; z-index:2; animation: float-card 7s ease-in-out 1s infinite; }
.hero-floating-card.card-3 { top:40%; right:15%; width:45%; z-index:1; animation: float-card 8s ease-in-out 2s infinite; }
@keyframes float-card {
    0%,100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.hero-floating-card .card-icon {
    width: 38px; height: 38px;
    border-radius: var(--radius-sm);
    background: var(--gradient-accent);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 12px;
    font-size: 1rem;
    color: #fff;
}
.hero-floating-card .card-label {
    font-size: 0.75rem; color: var(--dark-text-secondary);
    font-family: var(--font-mono);
    text-transform: uppercase; letter-spacing: 0.5px;
}
.hero-floating-card .card-value {
    font-weight: 600; font-size: 1rem; color: var(--dark-text-primary);
}

/* ========== ABOUT & STATS ========== */
.about-image-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
}
.about-stat-cards {
    display: flex; gap: 16px; margin-top: 24px; flex-wrap: wrap;
}
.stat-card {
    flex: 1; min-width: 100px;
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    text-align: center;
    transition: var(--transition);
}
.stat-card:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: var(--accent-light);
}
.stat-number {
    font-size: 2rem; font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label {
    font-size: 0.8rem; color: var(--text-muted); margin-top: 4px;
}
.check-list {
    list-style: none; padding: 0; margin-top: 20px;
}
.check-list li {
    padding: 8px 0; color: var(--text-secondary);
    display: flex; align-items: flex-start; gap: 10px;
    font-size: 0.95rem;
}
.check-list li i {
    color: var(--accent); font-size: 1.1rem; margin-top: 2px;
}

/* ========== SERVICES ========== */
.service-card {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 24px;
    height: 100%;
    transition: var(--transition);
}
.service-card:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: var(--accent-light);
    transform: translateY(-4px);
}
.service-card img {
    width: 100%;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    aspect-ratio: 16/10;
    object-fit: cover;
    border: 1px solid var(--border-light);
}
.service-card h4 {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.service-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ========== EVENTOS ========== */
.eventos-section {
    background: var(--bg-card-alt);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}
.video-thumb-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-card);
    cursor: pointer;
    transition: var(--transition);
}
.video-thumb-wrapper:hover {
    box-shadow: var(--shadow-card-hover);
    transform: scale(1.02);
}
.video-play-overlay {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,0.2);
}
.play-btn-circle {
    width: 70px; height: 70px;
    border-radius: 50%;
    background: #fff;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    transition: var(--transition);
}
.play-btn-circle i {
    color: var(--accent); font-size: 1.6rem; margin-left: 4px;
}

/* ========== COLABORADORES ========== */
.partner-logo-card {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 16px;                     /* menos padding para dar más espacio al logo */
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    aspect-ratio: 3/2;
}
.partner-logo-card:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: var(--accent-light);
}
.partner-logo-card img {
    width: 100%;
    height: 100%;
    object-fit: contain;               /* el logo llena el card manteniendo su proporción */
    filter: grayscale(100%);           /* escala de grises completa para un tono gris elegante */
    transition: var(--transition);
    opacity: 0.7;                      /* sutil transparencia */
}
.partner-logo-card:hover img {
    filter: grayscale(0%);             /* color original al pasar el ratón */
    opacity: 1;
    transform: scale(1.05);            /* ligero zoom */
}

/* ========== CONTACTO ========== */
.contact-card {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-card);
}
.form-control-custom {
    background: var(--bg-body);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-size: 0.95rem;
    color: var(--text-primary);
    width: 100%;
    transition: var(--transition);
}
.form-control-custom:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}
.btn-submit {
    width: 100%;
    background: var(--gradient-accent);
    color: #fff;
    border: none;
    padding: 14px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(37,99,235,0.3);
}
.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37,99,235,0.4);
}
.form-check-input:checked {
    background-color: var(--accent);
    border-color: var(--accent);
}

/* ========== FOOTER (oscuro) ========== */
.footer-section {
    background: var(--dark-bg);
    border-top: 1px solid var(--dark-border);
    padding: 30px 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--dark-text-secondary);
}
.footer-section a {
    color: var(--dark-text-primary);
    text-decoration: none;
}
.footer-section a:hover {
    color: #ffffff;
}

/* ========== LIGHTBOX ========== */
.lightbox {
    position: fixed; top:0; left:0; width:100%; height:100%;
    background: rgba(0,0,0,0.9);
    display: none; justify-content: center; align-items: center;
    z-index: 9999;
}
.lightbox iframe {
    width:75%; height:75%; border:none; border-radius: var(--radius-md);
}
.lightbox .close-btn {
    position: absolute; top:24px; right:24px;
    font-size: 32px; color: #fff; cursor: pointer;
    width:44px; height:44px; border-radius:50%;
    background: rgba(255,255,255,0.2);
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}
.lightbox .close-btn:hover {
    background: rgba(255,255,255,0.3);
}

/* ========== FOOTER ENRIQUECIDO ========== */
.footer-link {
    color: var(--dark-text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}
.footer-link:hover {
    color: #ffffff;
    padding-left: 4px;
}

.social-icons {
    display: flex;
    gap: 16px;                     /* más separación entre iconos */
}
.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;                   /* círculo más grande */
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);   /* tono más claro que el fondo */
    color: #ffffff;                            /* icono blanco puro */
    font-size: 1.1rem;                         /* icono ligeramente más grande */
    transition: var(--transition);
    text-decoration: none;
}
.social-icon:hover {
    background: var(--gradient-accent);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

/* ========== ENLACES LEGALES CON INDICADOR ========== */
.legal-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: inline-block;        /* para que el centrado en móvil funcione */
    text-align: left;             /* texto de los enlaces a la izquierda */
}
.legal-links li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
}
.legal-links li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 2px;
    background: var(--accent-light);
    border-radius: 1px;
}
.legal-links a {
    color: var(--dark-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}
.legal-links a:hover {
    color: #ffffff;
    padding-left: 6px;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 991px) {
    .navbar-collapse {
        background: rgba(10,14,20,0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-radius: var(--radius-md);
        padding: 16px;
        margin-top: 10px;
        border: 1px solid var(--dark-border);
    }
    .hero-section {
        min-height: auto;
        padding: 120px 0 60px;
    }
    .hero-visual {
        margin-top: 40px;
    }
}
@media (max-width: 767px) {
    .hero-title {
        font-size: 2rem;
    }
    .hero-floating-card.card-2,
    .hero-floating-card.card-3 {
        display: none;
    }
    .hero-floating-card.card-1 {
        position: relative;
        top: auto; left: auto; width: 100%;
        animation: none;
    }
}