* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;     /* ← ajusta la info del navbar */
} 

html {
    overflow: hidden; /* Evita scroll horizontal en todo el sitio */
    scroll-behavior: smooth; /* Suaviza el scroll al hacer clic en enlaces internos */
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0; 
    padding-top: 0px;
    -moz-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
} 


body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-family: 'Montserrat', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif, Geneva, Verdana, sans-serif;
    background-color: #f4f6f9;
    color: #333;
    overflow-x: hidden;    /* ← Evita scroll horizontal */
} 

/* ===== NAVBAR ===== */

.navbar {
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    padding: 10px 50px;
    background: #000;   /* ← si dejo en transparent presentara la imagen que este de backgound */
    right: 0;
    z-index: 100;
    height: 100px;       /* ← Posicion de la barra negra defalut 80px. ajustar segun la web */
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    max-width: 1400px;      /* ← 1200px default y en pantallas grandes 1400px */
    margin: auto;
    width: 100%;
    position: relative;     /* ← Para el menú móvil */
}

.menu-toggle {
    display: none;
    font-size: 24px;        /* ← Tamaño del ícono del menú hamburguesa es de 24px  por default*/
    color: #fff;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px;
    border-radius: 8px;     /* ← Tamaño por default 4px*/
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

@media (max-width: 900px) {
    .navbar {
        padding: 10px 20px;
        height: 80px;       /* ← Ajusta la altura del navbar en móviles */
    }
}

.menu-toggle {
    display: block;
}

.logo-img {
    height: 40px;
    width: auto;
    max-width: 100px;     /* ← Ajusta el tamaño del logo según tu imagen default 150px */
}

/* LINKS */

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
    white-space: nowrap;        /* Evita que los enlaces se rompan en varias líneas */ 
}

.nav-links a:hover {
    color: #00bcd4;
}

/* MENU HAMBURGUESA */

/* ===== MENÚ HAMBURGUESA — UNIFICADO ===== */
@media (max-width: 991px) {
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        background: rgba(255,255,255,0.15);
        border-radius: 10px;
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
        z-index: 1001;
        border: none;
        color: #fff;
        font-size: 20px;
        transition: all 0.3s ease;
    }
    
    .menu-toggle:hover,
    .menu-toggle:active {
        background: rgba(255,255,255,0.25);
    }

    .nav-links { 
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        max-width: 80%;
        height: 100vh;
        height: 100dvh;
        background: #000;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        gap: 0;
        padding: 90px 25px 25px 25px;
        transition: right 0.35s ease-in-out;
        display: flex;
        z-index: 1000;
        box-shadow: -5px 0 30px rgba(0,0,0,0.4);
        overflow-y: auto;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-links a {
        display: block;
        width: 100%;
        padding: 14px 0;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        font-size: 15px;
        color: #fff;
        text-align: left;
        text-decoration: none;
    }
    
    .nav-links a:hover {
        color: #00bcd4;
        padding-left: 8px;
        transition: all 0.2s;
    }
    
    /* Fondo oscuro cuando el menú está abierto */
    body.menu-open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 999;
        pointer-events: none;
    }
}

/* En desktop el menú hamburguesa no se muestra */
@media (min-width: 992px) {
    .menu-toggle {
        display: none !important;
    }
}

/* ===== HERO ===== */
/* cuando no quiera el background solo Del este .hero */

.hero {
    position: relative;
    height: 100vh;
    max-height: 100vh;        /* ← NUEVO: evita que crezca al hacer zoom out */
    margin-top: 80px;
    background: url('../muro/muro 1.jpg') center/cover no-repeat;
    background-position: center;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;         /* ← NUEVO: recorta lo que se salga */
    width: 100%;              /* ← NUEVO: nunca más ancho que la pantalla */
    box-sizing: border-box;
}

.hero-overlay {
    background: rgba(0, 0, 0, 0.65);
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-text {
    color: #ffffff; /* Fuerza el blanco */
    text-align: center; /* Centrado horizontal */
    max-width: 800px; 
    padding: 0 20px; /* Para que no se corte en móviles */
    animation: fadeIn 1.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-text h1 {
    font-size: 38px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-text p {
    font-size: 20px;
}

/* ===== CONTENT ===== */

.content {
    position: relative;
    z-index: 2;
    background: #f4f6f9;
    flex: 1;
    padding: 60px 16px;         /* ← 16px en vez de 20px para móvil */
    max-width: 1200px;
    margin: auto;
    box-sizing: border-box;
}

.section {
    margin-bottom: 60px;        /* ← Separación entre Textos */
    text-align: center;         /* ← Dirección del texto */
}

.section h2 {
    margin-bottom: 14px;
    font-size: 30px;    /* ← Tamaño de fuente para el TÍTULO de la sección */
}

.section p {
    font-size: 16px;    /* ← Tamaño de fuente para el Texto de la sección */
    line-height: 1.5;   /* ← Interlineado */
    color: #555;
    max-width: 800px;
    margin: auto;
}

/* ===== FOOTER ===== */
.footer {
    position: relative;
    z-index: 2;
    background: #111;       /* ← color del footer */
    color:#ccc;
    text-align: center;      /* ← Orienta el texto */
    padding: 50px 15px;     /* ← Separación superior e inferior */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.social-icons {
    margin: 25px 0;
    display: flex;
    justify-content: center;    
    gap: 20px;       /* ← Espacio entre los íconos o elementos */
    flex-wrap: wrap;            /* ← Se ajusta si no caben */
}

.social-icons a {
    color: #fff;
    font-size: 22px;
    transition: color 0.3s;
    display: flex;              /* ← Flexbox para centrar */
    align-items: center;        /* ← Centra verticalmente */
    justify-content: center;    /* ← Centra horizontalmente */
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: color 0.3s; 
}
.social-icons a i, 
.social-icons a svg {
    line-height: 1px; /* Centra el ícono verticalmente */
    display: block;   /* Asegura que el ícono se comporte como bloque dentro del enlace */  
}

.social-icons a:hover {
    color: #00bcd4;
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid #333;
    padding: 20px 15px;
    font-size: 14px;
    color: #777;
}  
/* ═══════════════════════════════════════════════════════════════
   LYVAD PANTASMA - RESPONSIVE COMPLETO
   Todos los dispositivos:
   • Desktop: Mac, Windows, Linux (pantallas grandes y estándar)
   • Laptop: MacBook, Windows laptops, Linux laptops
   • Tablet: iPad, Android tablets, Surface
   • Mobile: iPhone, Galaxy, Pixel, Xiaomi, etc.
   ═══════════════════════════════════════════════════════════════ */


/* ================================================================
   0. DESKTOP GRANDE (1400px+)
   Monitores 27", 32", iMac, ultrawide, 4K
   ================================================================ */
@media (min-width: 1400px) {
    .nav-container {
        max-width: 1320px;
        padding: 0 40px;
    }
    
    .nav-links {
        gap: 35px;
    }
    
    .nav-links a {
        font-size: 16px;
    }
    
    .brand .logo-img {
        height: 55px;
    }
    
    .hero {
        height: 85vh;
        min-height: 700px;
    }
    
    .hero-text h1 {
        font-size: 4.5rem;
    }
    
    .hero-text p {
        font-size: 1.6rem;
    }
    
    .countdown-section {
        padding: 70px 30px 100px 30px;
    }
    
    .countdown-container {
        max-width: 700px;
        padding: 50px 45px;
    }
    
    .countdown-title {
        font-size: 56px;
    }
    
    .time-box {
        min-width: 100px;
        padding: 22px 16px;
    }
    
    .time-number {
        font-size: 44px;
    }
    
    .time-text {
        font-size: 13px;
    }
    
    .time-separator {
        font-size: 38px;
    }
    
    .countdown-date {
        font-size: 18px;
    }
    
    .expositor-nombre {
        font-size: 20px;
    }
    
    .countdown-message {
        font-size: 16px;
    }
    
    .youth-section {
        margin-top: 60px;
        padding: 80px 30px 70px 30px;
    }
    
    .youth-container {
        max-width: 900px;
        padding: 50px 45px;
    }
    
    .youth-title {
        font-size: 3rem;
    }
    
    .youth-time-box {
        min-width: 100px;
        padding: 25px 18px;
    }
    
    .youth-time-number {
        font-size: 3rem;
    }
    
    .youth-time-text {
        font-size: 1rem;
    }
    
    .youth-time-separator {
        font-size: 2.5rem;
    }
    
    .youth-info-card {
        gap: 20px;
    }
    
    .youth-info-item {
        padding: 18px;
    }
    
    .info-value {
        font-size: 1rem;
    }
    
    .youth-whatsapp-btn {
        max-width: 450px;
        padding: 20px 30px;
    }
    
    .footer-content h3 {
        font-size: 1.6rem;
    }
    
    .social-icons a {
        width: 50px;
        height: 50px;
        font-size: 22px;
    }
}


/* ================================================================
   1. DESKTOP ESTÁNDAR (1200px - 1399px)
   Monitores 24", laptops 17", MacBook Pro 16", Windows desktop
   ================================================================ */
@media (max-width: 1399px) {
    .nav-container {
        max-width: 1140px;
        padding: 0 30px;
    }
    
    .nav-links {
        gap: 30px;
    }
    
    .nav-links a {
        font-size: 15px;
    }
    
    .brand .logo-img {
        height: 50px;
    }
    
    .hero {
        height: 80vh;
        min-height: 600px;
    }
    
    .hero-text h1 {
        font-size: 4rem;
    }
    
    .hero-text p {
        font-size: 1.4rem;
    }
    
    .countdown-section {
        padding: 60px 25px 90px 25px;
    }
    
    .countdown-container {
        max-width: 650px;
        padding: 45px 40px;
    }
    
    .countdown-title {
        font-size: 52px;
    }
    
    .time-box {
        min-width: 90px;
        padding: 20px 14px;
    }
    
    .time-number {
        font-size: 40px;
    }
    
    .time-text {
        font-size: 12px;
    }
    
    .time-separator {
        font-size: 34px;
    }
    
    .countdown-date {
        font-size: 17px;
    }
    
    .expositor-nombre {
        font-size: 19px;
    }
    
    .countdown-message {
        font-size: 15px;
    }
    
    .youth-section {
        margin-top: 55px;
        padding: 70px 25px 60px 25px;
    }
    
    .youth-container {
        max-width: 850px;
        padding: 45px 40px;
    }
    
    .youth-title {
        font-size: 2.8rem;
    }
    
    .youth-time-box {
        min-width: 90px;
        padding: 22px 16px;
    }
    
    .youth-time-number {
        font-size: 2.8rem;
    }
    
    .youth-time-text {
        font-size: 0.9rem;
    }
    
    .youth-time-separator {
        font-size: 2.2rem;
    }
    
    .youth-info-card {
        gap: 18px;
    }
    
    .youth-info-item {
        padding: 16px;
    }
    
    .info-value {
        font-size: 0.95rem;
    }
    
    .youth-whatsapp-btn {
        max-width: 420px;
        padding: 18px 28px;
    }
    
    .footer-content h3 {
        font-size: 1.5rem;
    }
    
    .social-icons a {
        width: 48px;
        height: 48px;
        font-size: 21px;
    }
}


/* ================================================================
   2. LAPTOP MEDIANA (992px - 1199px)
   MacBook Air 13", MacBook Pro 14", laptops Windows 14-15", Linux
   ================================================================ */
@media (max-width: 1199px) {
    .nav-container {
        max-width: 960px;
        padding: 0 25px;
    }
    
    .nav-links {
        gap: 25px;
    }
    
    .nav-links a {
        font-size: 14.5px;
    }
    
    .brand .logo-img {
        height: 48px;
    }
    
    .hero {
        height: 75vh;
        min-height: 550px;
    }
    
    .hero-text h1 {
        font-size: 3.5rem;
    }
    
    .hero-text p {
        font-size: 1.3rem;
    }
    
    .countdown-section {
        padding: 55px 25px 85px 25px;
    }
    
    .countdown-container {
        max-width: 620px;
        padding: 40px 35px;
    }
    
    .countdown-title {
        font-size: 48px;
    }
    
    .time-box {
        min-width: 85px;
        padding: 18px 12px;
    }
    
    .time-number {
        font-size: 38px;
    }
    
    .time-text {
        font-size: 11px;
    }
    
    .time-separator {
        font-size: 30px;
    }
    
    .countdown-date {
        font-size: 16px;
    }
    
    .expositor-nombre {
        font-size: 18px;
    }
    
    .countdown-message {
        font-size: 14px;
    }
    
    .youth-section {
        margin-top: 50px;
        padding: 65px 25px 55px 25px;
    }
    
    .youth-container {
        max-width: 800px;
        padding: 40px 35px;
    }
    
    .youth-title {
        font-size: 2.6rem;
    }
    
    .youth-time-box {
        min-width: 85px;
        padding: 20px 14px;
    }
    
    .youth-time-number {
        font-size: 2.6rem;
    }
    
    .youth-time-text {
        font-size: 0.85rem;
    }
    
    .youth-time-separator {
        font-size: 2rem;
    }
    
    .youth-info-card {
        gap: 16px;
    }
    
    .youth-info-item {
        padding: 14px;
    }
    
    .info-value {
        font-size: 0.9rem;
    }
    
    .youth-whatsapp-btn {
        max-width: 400px;
        padding: 17px 25px;
    }
    
    .footer-content h3 {
        font-size: 1.4rem;
    }
    
    .social-icons a {
        width: 46px;
        height: 46px;
        font-size: 20px;
    }
}


/* ================================================================
   3. TABLETS (768px - 991px)
   iPad, iPad Mini, iPad Air, Surface, tablets Android 10"
   ================================================================ */
@media (max-width: 991px) {
    .nav-container {
        padding: 0 20px;
    }
    
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        background: rgba(255,255,255,0.15);
        border-radius: 10px;
        cursor: pointer;
        z-index: 1001;
        border: none;
        color: #fff;
        font-size: 20px;
        transition: all 0.3s ease;
    }
    
    .menu-toggle:hover {
        background: rgba(255,255,255,0.25);
    }
    
    .menu-toggle.active {
        background: rgba(255,255,255,0.3);
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 320px;
        height: 100vh;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 80px 30px 30px 30px;
        gap: 0;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        box-shadow: -10px 0 40px rgba(0,0,0,0.3);
        overflow-y: auto;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-links a {
        display: block;
        width: 100%;
        padding: 15px 0;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        font-size: 16px;
        color: #fff;
        text-align: left;
    }
    
    .nav-links a:last-child {
        border-bottom: none;
    }
    
    .nav-links a:hover {
        padding-left: 10px;
        background: rgba(255,255,255,0.1);
        border-radius: 8px;
    }
    
    .nav-links.active::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: -1;
        pointer-events: none;
    }
    
    .brand .logo-img {
        height: 45px;
    }
    
    .navbar {
        padding: 12px 0;
    }
    
    .hero {
        height: 70vh;
        min-height: 500px;
    }
    
    .hero-text h1 {
        font-size: 3rem;
        line-height: 1.2;
    }
    
    .hero-text p {
        font-size: 1.3rem;
    }
    
    .countdown-section {
        padding: 45px 20px 70px 20px;
        border-radius: 0 0 35px 35px;
    }
    
    .countdown-container {
        max-width: 90%;
        padding: 35px 30px;
    }
    
    .countdown-title {
        font-size: 40px;
    }
    
    .time-box {
        min-width: 85px;
        padding: 16px 10px;
    }
    
    .time-number {
        font-size: 34px;
    }
    
    .time-text {
        font-size: 10px;
    }
    
    .time-separator {
        font-size: 28px;
    }
    
    .countdown-date {
        font-size: 15px;
    }
    
    .expositor-nombre {
        font-size: 17px;
    }
    
    .countdown-message {
        font-size: 13px;
    }
    
    .youth-section {
        margin-top: 40px;
        padding: 60px 20px 50px 20px;
        border-radius: 35px;
    }
    
    .youth-container {
        max-width: 90%;
        padding: 35px 25px;
    }
    
    .youth-title {
        font-size: 2.2rem;
    }
    
    .youth-time-box {
        min-width: 85px;
        padding: 18px 12px;
    }
    
    .youth-time-number {
        font-size: 2.2rem;
    }
    
    .youth-time-text {
        font-size: 0.8rem;
    }
    
    .youth-time-separator {
        font-size: 1.8rem;
    }
    
    .youth-date {
        font-size: 1rem;
    }
    
    .youth-info-card {
        gap: 12px;
    }
    
    .youth-info-item {
        padding: 12px;
    }
    
    .info-value {
        font-size: 0.85rem;
    }
    
    .youth-expositor-nombre {
        font-size: 0.95rem;
    }
    
    .youth-message {
        font-size: 0.95rem;
    }
    
    .youth-whatsapp-btn {
        padding: 16px 22px;
        max-width: 380px;
    }
    
    .footer-content h3 {
        font-size: 1.4rem;
    }
    
    .social-icons a {
        width: 45px;
        height: 45px;
        font-size: 20px;
    }
    
    .footer-bottom {
        font-size: 13px;
    }
}


/* ================================================================
   4. MOBILE GRANDE (576px - 767px)
   iPhone 14/15 Pro Max, Galaxy S24 Ultra, Pixel 8 Pro, iPhone XS Max
   ================================================================ */
@media (max-width: 767px) {
    .nav-container {
        padding: 0 15px;
    }
    
    .menu-toggle {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .nav-links {
        width: 80%;
        max-width: 300px;
        padding: 70px 25px 25px 25px;
    }
    
    .nav-links a {
        padding: 14px 0;
        font-size: 15px;
    }
    
    .brand .logo-img {
        height: 40px;
    }
    
    .navbar {
        padding: 10px 0;
    }
    
    .hero {
        height: 60vh;
        min-height: 450px;
    }
    
    .hero-text h1 {
        font-size: 2.4rem;
    }
    
    .hero-text p {
        font-size: 1.1rem;
    }
    
    .hero-overlay {
        padding: 0 20px;
    }
    
    .countdown-section {
        padding: 35px 15px 55px 15px;
        border-radius: 0 0 30px 30px;
    }
    
    .countdown-container {
        padding: 30px 20px;
        border-radius: 25px;
        border-width: 3px;
        max-width: 95%;
    }
    
    .countdown-title {
        font-size: 34px;
        letter-spacing: 3px;
    }
    
    .countdown-label {
        font-size: 13px;
        letter-spacing: 2px;
    }
    
    .countdown-label i {
        font-size: 20px;
    }
    
    .time-box {
        min-width: 70px;
        padding: 14px 8px;
        border-radius: 15px;
        border-width: 2px;
    }
    
    .time-number {
        font-size: 28px;
    }
    
    .time-text {
        font-size: 9px;
    }
    
    .time-separator {
        font-size: 24px;
    }
    
    .countdown-timer {
        gap: 8px;
    }
    
    .countdown-date {
        font-size: 13px;
        padding: 6px 15px;
    }
    
    .countdown-expositor {
        padding: 12px 20px;
    }
    
    .expositor-nombre {
        font-size: 15px;
    }
    
    .countdown-message {
        font-size: 12px;
        flex-direction: column;
        gap: 6px;
    }
    
    .youth-section {
        margin-top: 30px;
        padding: 45px 15px 40px 15px;
        border-radius: 30px;
    }
    
    .youth-container {
        padding: 30px 20px;
        border-radius: 20px;
        max-width: 95%;
    }
    
    .youth-title {
        font-size: 1.8rem;
        margin-bottom: 25px;
    }
    
    .youth-label {
        font-size: 12px;
        padding: 8px 18px;
        letter-spacing: 1px;
    }
    
    .youth-time-box {
        min-width: 70px;
        padding: 15px 10px;
        border-radius: 14px;
    }
    
    .youth-time-number {
        font-size: 1.8rem;
    }
    
    .youth-time-text {
        font-size: 0.75rem;
    }
    
    .youth-time-separator {
        font-size: 1.5rem;
        padding-top: 10px;
    }
    
    .youth-timer {
        gap: 10px;
    }
    
    .youth-date {
        font-size: 0.95rem;
        margin-bottom: 20px;
    }
    
    .youth-info-card {
        grid-template-columns: 1fr;
        gap: 10px;
        margin-bottom: 20px;
    }
    
    .youth-info-item {
        padding: 12px;
    }
    
    .youth-expositor {
        padding: 12px 20px;
        margin-bottom: 15px;
    }
    
    .youth-expositor i {
        font-size: 20px;
    }
    
    .youth-expositor-nombre {
        font-size: 0.9rem;
    }
    
    .youth-message {
        font-size: 0.9rem;
        margin-bottom: 20px;
    }
    
    .youth-whatsapp-btn {
        padding: 14px 18px;
        max-width: 100%;
    }
    
    .whatsapp-icon {
        font-size: 24px;
    }
    
    .whatsapp-action {
        font-size: 0.95rem;
    }
    
    .footer-content {
        padding: 30px 20px;
    }
    
    .footer-content h3 {
        font-size: 1.2rem;
    }
    
    .social-icons {
        gap: 15px;
    }
    
    .social-icons a {
        width: 42px;
        height: 42px;
        font-size: 18px;
    }
    
    .footer-bottom {
        font-size: 12px;
        padding: 15px;
    }
}

/* ================================================================
   5. MOBILE MEDIO (481px - 575px)
   iPhone 14/15, Galaxy S24/S23, Pixel 8/7, iPhone XR, Galaxy A54
   ================================================================ */
@media (max-width: 575px) {
    .nav-links {
        width: 85%;
        max-width: 280px;
        padding: 65px 20px 20px 20px;
    }
    
    .nav-links a {
        padding: 13px 0;
        font-size: 14px;
    }
    
    .brand .logo-img {
        height: 38px;
    }
    
    .menu-toggle {
        width: 38px;
        height: 38px;
        font-size: 17px;
    }
    
    .hero {
        height: 55vh;
        min-height: 400px;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-text p {
        font-size: 1rem;
    }
    
    .countdown-section {
        padding: 30px 12px 50px 12px;
        border-radius: 0 0 25px 25px;
    }
    
    .countdown-container {
        padding: 25px 15px;
        border-radius: 20px;
        border-width: 3px;
        width: 95%;
    }
    
    .countdown-title {
        font-size: 28px;
        letter-spacing: 2px;
        margin-bottom: 20px;
    }
    
    .countdown-label {
        font-size: 12px;
        padding: 8px 16px;
        letter-spacing: 1px;
    }
    
    .time-box {
        min-width: 60px;
        padding: 12px 6px;
        border-radius: 12px;
    }
    
    .time-number {
        font-size: 24px;
    }
    
    .time-text {
        font-size: 8px;
        letter-spacing: 0.5px;
    }
    
    .time-separator {
        font-size: 20px;
        padding-top: 3px;
    }
    
    .countdown-timer {
        gap: 6px;
    }
    
    .countdown-date {
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .countdown-expositor {
        padding: 10px 15px;
        gap: 8px;
    }
    
    .countdown-expositor i {
        font-size: 18px;
    }
    
    .expositor-nombre {
        font-size: 14px;
    }
    
    .expositor-label {
        font-size: 10px;
    }
    
    .countdown-message {
        font-size: 11px;
    }
    
    .countdown-message i {
        font-size: 14px;
    }
    
    .youth-section {
        margin-top: 25px;
        padding: 40px 12px 35px 12px;
        border-radius: 25px;
    }
    
    .youth-container {
        padding: 25px 15px;
        border-radius: 18px;
        max-width: 95%;
    }
    
    .youth-title {
        font-size: 1.6rem;
        margin-bottom: 20px;
        letter-spacing: 1px;
    }
    
    .youth-label {
        font-size: 11px;
        padding: 7px 14px;
    }
    
    .youth-label i {
        font-size: 16px;
    }
    
    .youth-time-box {
        min-width: 60px;
        padding: 12px 8px;
        border-radius: 12px;
    }
    
    .youth-time-number {
        font-size: 1.5rem;
    }
    
    .youth-time-text {
        font-size: 0.7rem;
        letter-spacing: 0.5px;
    }
    
    .youth-time-separator {
        font-size: 1.3rem;
        padding-top: 8px;
    }
    
    .youth-timer {
        gap: 8px;
        margin-bottom: 20px;
    }
    
    .youth-date {
        font-size: 0.9rem;
        margin-bottom: 18px;
    }
    
    .youth-info-item {
        padding: 10px;
        gap: 10px;
    }
    
    .youth-info-item i {
        font-size: 18px;
    }
    
    .info-value {
        font-size: 0.85rem;
    }
    
    .youth-expositor {
        padding: 10px 16px;
        gap: 10px;
    }
    
    .youth-expositor i {
        font-size: 18px;
    }
    
    .youth-expositor-nombre {
        font-size: 0.85rem;
    }
    
    .youth-expositor-label {
        font-size: 0.7rem;
    }
    
    .youth-message {
        font-size: 0.85rem;
        margin-bottom: 18px;
        gap: 8px;
    }
    
    .youth-message i {
        font-size: 16px;
    }
    
    .youth-whatsapp-btn {
        padding: 12px 16px;
        border-radius: 14px;
        gap: 12px;
    }
    
    .whatsapp-icon {
        font-size: 22px;
        min-width: 30px;
    }
    
    .whatsapp-action {
        font-size: 0.9rem;
    }
    
    .whatsapp-label {
        font-size: 0.75rem;
    }
    
    .whatsapp-arrow {
        font-size: 16px;
    }
    
    .footer-content {
        padding: 25px 15px;
    }
    
    .footer-content h3 {
        font-size: 1.1rem;
    }
    
    .social-icons {
        gap: 12px;
    }
    
    .social-icons a {
        width: 38px;
        height: 38px;
        font-size: 16px;
    }
    
    .footer-bottom {
        font-size: 11px;
        padding: 12px;
    }
}


/* ================================================================
   6. MOBILE PEQUEÑO (360px - 480px)
   iPhone SE, iPhone 8/7/6, Galaxy A14, Pixel 4a, iPhone 5/5S
   ================================================================ */
@media (max-width: 480px) {
    .nav-links {
        width: 90%;
        max-width: 260px;
        padding: 60px 18px 18px 18px;
    }
    
    .nav-links a {
        padding: 12px 0;
        font-size: 13.5px;
    }
    
    .brand .logo-img {
        height: 35px;
    }
    
    .menu-toggle {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .navbar {
        padding: 8px 0;
    }
    
    .hero {
        height: 50vh;
        min-height: 350px;
    }
    
    .hero-text h1 {
        font-size: 1.7rem;
    }
    
    .hero-text p {
        font-size: 0.95rem;
    }
    
    .hero-overlay {
        padding: 0 15px;
    }
    
    .countdown-section {
        padding: 25px 10px 45px 10px;
        border-radius: 0 0 20px 20px;
    }
    
    .countdown-container {
        padding: 20px 12px;
        border-radius: 18px;
        border-width: 2px;
        width: 95%;
    }
    
    .countdown-title {
        font-size: 24px;
        letter-spacing: 1px;
        margin-bottom: 18px;
    }
    
    .countdown-label {
        font-size: 11px;
        padding: 6px 14px;
    }
    
    .countdown-label i {
        font-size: 18px;
    }
    
    .time-box {
        min-width: 52px;
        padding: 10px 4px;
        border-radius: 10px;
        border-width: 2px;
    }
    
    .time-number {
        font-size: 22px;
    }
    
    .time-text {
        font-size: 7.5px;
    }
    
    .time-separator {
        font-size: 18px;
    }
    
    .countdown-timer {
        gap: 5px;
    }
    
    .countdown-date {
        font-size: 11px;
        padding: 5px 10px;
    }
    
    .countdown-expositor {
        padding: 8px 12px;
        border-radius: 10px;
    }
    
    .expositor-nombre {
        font-size: 13px;
    }
    
    .countdown-message {
        font-size: 10.5px;
    }
    
    .youth-section {
        margin-top: 20px;
        padding: 35px 10px 30px 10px;
        border-radius: 20px;
    }
    
    .youth-container {
        padding: 20px 12px;
        border-radius: 16px;
        width: 95%;
    }
    
    .youth-title {
        font-size: 1.4rem;
        margin-bottom: 18px;
    }
    
    .youth-label {
        font-size: 10px;
        padding: 6px 12px;
        letter-spacing: 0.5px;
    }
    
    .youth-label i {
        font-size: 14px;
    }
    
    .youth-time-box {
        min-width: 52px;
        padding: 10px 6px;
        border-radius: 10px;
    }
    
    .youth-time-number {
        font-size: 1.3rem;
    }
    
    .youth-time-text {
        font-size: 0.65rem;
    }
    
    .youth-time-separator {
        font-size: 1.1rem;
        padding-top: 6px;
    }
    
    .youth-timer {
        gap: 6px;
        margin-bottom: 18px;
    }
    
    .youth-date {
        font-size: 0.85rem;
        margin-bottom: 15px;
    }
    
    .youth-info-item {
        padding: 8px 10px;
        border-radius: 10px;
    }
    
    .youth-info-item i {
        font-size: 16px;
    }
    
    .info-value {
        font-size: 0.8rem;
    }
    
    .info-label {
        font-size: 0.65rem;
    }
    
    .youth-expositor {
        padding: 8px 14px;
        border-radius: 10px;
        margin-bottom: 12px;
    }
    
    .youth-expositor i {
        font-size: 16px;
    }
    
    .youth-expositor-nombre {
        font-size: 0.8rem;
    }
    
    .youth-expositor-label {
        font-size: 0.65rem;
    }
    
    .youth-message {
        font-size: 0.8rem;
        margin-bottom: 15px;
        flex-direction: column;
        text-align: center;
    }
    
    .youth-message i {
        font-size: 14px;
    }
    
    .youth-whatsapp-btn {
        flex-direction: column;
        text-align: center;
        gap: 8px;
        padding: 12px 14px;
    }
    
    .whatsapp-info {
        text-align: center;
    }
    
    .whatsapp-icon {
        font-size: 24px;
    }
    
    .whatsapp-action {
        font-size: 0.85rem;
    }
    
    .whatsapp-arrow {
        transform: rotate(90deg);
        font-size: 14px;
    }
    
    .footer-content {
        padding: 20px 12px;
    }
    
    .footer-content h3 {
        font-size: 1rem;
    }
    
    .social-icons {
        gap: 10px;
    }
    
    .social-icons a {
        width: 36px;
        height: 36px;
        font-size: 15px;
    }
    
    .footer-bottom {
        font-size: 10.5px;
        padding: 10px;
    }
}


/* ================================================================
   7. MUY PEQUEÑO (< 360px)
   iPhone 4/4S, Galaxy S3 Mini, Android 4" antiguos
   ================================================================ */
@media (max-width: 359px) {
    .nav-links {
        width: 95%;
        padding: 55px 15px 15px 15px;
    }
    
    .nav-links a {
        padding: 11px 0;
        font-size: 13px;
    }
    
    .brand .logo-img {
        height: 32px;
    }
    
    .menu-toggle {
        width: 34px;
        height: 34px;
        font-size: 15px;
    }
    
    .hero {
        height: 45vh;
        min-height: 300px;
    }
    
    .hero-text h1 {
        font-size: 1.5rem;
    }
    
    .hero-text p {
        font-size: 0.9rem;
    }
    
    .countdown-section {
        padding: 20px 8px 40px 8px;
    }
    
    .countdown-container {
        padding: 18px 10px;
        border-radius: 15px;
    }
    
    .countdown-title {
        font-size: 20px;
    }
    
    .time-box {
        min-width: 45px;
        padding: 8px 3px;
    }
    
    .time-number {
        font-size: 18px;
    }
    
    .time-text {
        font-size: 7px;
    }
    
    .time-separator {
        font-size: 14px;
    }
    
    .countdown-date {
        font-size: 10px;
    }
    
    .expositor-nombre {
        font-size: 12px;
    }
    
    .youth-section {
        margin-top: 15px;
        padding: 30px 8px 25px 8px;
        border-radius: 18px;
    }
    
    .youth-container {
        padding: 15px 10px;
        border-radius: 14px;
    }
    
    .youth-title {
        font-size: 1.2rem;
        margin-bottom: 15px;
    }
    
    .youth-label {
        font-size: 9px;
        padding: 5px 10px;
    }
    
    .youth-time-box {
        min-width: 45px;
        padding: 8px 4px;
        border-radius: 8px;
    }
    
    .youth-time-number {
        font-size: 1.1rem;
    }
    
    .youth-time-text {
        font-size: 0.6rem;
    }
    
    .youth-time-separator {
        font-size: 1rem;
        padding-top: 4px;
    }
    
    .youth-timer {
        gap: 5px;
    }
    
    .youth-date {
        font-size: 0.8rem;
    }
    
    .youth-info-item {
        padding: 6px 8px;
    }
    
    .info-value {
        font-size: 0.75rem;
    }
    
    .youth-expositor {
        padding: 6px 10px;
    }
    
    .youth-expositor-nombre {
        font-size: 0.75rem;
    }
    
    .youth-message {
        font-size: 0.75rem;
    }
    
    .youth-whatsapp-btn {
        padding: 10px 12px;
    }
    
    .whatsapp-action {
        font-size: 0.8rem;
    }
    
    .footer-content h3 {
        font-size: 0.9rem;
    }
    
    .social-icons a {
        width: 34px;
        height: 34px;
        font-size: 14px;
    }
    
    .footer-bottom {
        font-size: 10px;
    }
}


/* ================================================================
   8. ORIENTACIÓN LANDSCAPE EN MÓVILES
   (iPhone horizontal, Android landscape)
   ================================================================ */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        height: 100vh;
        min-height: 300px;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-text p {
        font-size: 1rem;
    }
    
    .countdown-section,
    .youth-section {
        padding: 25px 15px;
    }
    
    .countdown-container,
    .youth-container {
        padding: 20px 15px;
    }
    
    .countdown-title,
    .youth-title {
        font-size: 1.8rem;
        margin-bottom: 15px;
    }
    
    .time-box,
    .youth-time-box {
        min-width: 55px;
        padding: 10px 6px;
    }
    
    .time-number,
    .youth-time-number {
        font-size: 1.5rem;
    }
    
    .youth-info-card {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .youth-whatsapp-btn {
        flex-direction: row;
        max-width: 350px;
    }
    
    .whatsapp-info {
        text-align: left;
    }
    
    .whatsapp-arrow {
        transform: none;
    }
    
    .nav-links {
        padding-top: 60px;
    }
}


/* ================================================================
   9. SAFE AREAS (iPhone notch, iPhone X en adelante)
   ================================================================ */
@supports (padding-top: env(safe-area-inset-top)) {
    .navbar {
        padding-top: max(10px, env(safe-area-inset-top));
    }
    
    .nav-links {
        padding-top: max(70px, calc(env(safe-area-inset-top) + 50px));
    }
}


/* ================================================================
   10. REDUCIR ANIMACIONES (Preferencias del usuario)
   Accesibilidad: usuarios con motion sickness
   ================================================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .time-number,
    .youth-time-number {
        animation: none;
    }
    
    .youth-section::after {
        animation: none;
    }
    
    .countdown-label i {
        animation: none;
    }
    
    .time-separator {
        animation: none;
    }
    
    .countdown-message i {
        animation: none;
    }
    
    .youth-message i {
        animation: none;
    }
}

/* ============================================
   MODO OSCURO DEL SISTEMA (opcional)
   ============================================ */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }

    .content {
        background: #1a1a1a;
    }

    .section p {
        color: #ccc;
    }
}