/* ═══════════════════════════════════════════════════════════════════
   Stanford School – Estilos Principales
   Diseño profesional, responsive, animado y moderno
   ═══════════════════════════════════════════════════════════════════ */

/* ─── CSS Variables (Design Tokens) ─── */
:root {
    /* Paleta de colores */
    --color-primary: #1B4D8F;
    --color-primary-light: #2A6AC7;
    --color-primary-dark: #0F3461;
    --color-secondary: #00A8E8;
    --color-secondary-light: #4DC9F6;
    --color-secondary-dark: #0088C2;
    --color-accent: #27AE60;
    --color-accent-light: #2ECC71;

    /* Neutros */
    --color-white: #FFFFFF;
    --color-black: #1A1A2E;
    --color-gray-50: #F8F9FA;
    --color-gray-100: #F1F3F5;
    --color-gray-200: #E9ECEF;
    --color-gray-300: #DEE2E6;
    --color-gray-400: #CED4DA;
    --color-gray-500: #ADB5BD;
    --color-gray-600: #6C757D;
    --color-gray-700: #495057;
    --color-gray-800: #343A40;
    --color-gray-900: #212529;

    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #0A3D7C 0%, #0078D4 50%, #00A8E8 100%);
    --gradient-hero: linear-gradient(135deg, #0F3461 0%, #1B4D8F 40%, #2A6AC7 100%);
    --gradient-warm: linear-gradient(135deg, #00A8E8 0%, #4DC9F6 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);

    /* Tipografía */
    --font-primary: 'Poppins', sans-serif;
    --font-display: 'Playfair Display', serif;

    /* Tamaños de fuente */
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.25rem;
    --fs-xl: 1.5rem;
    --fs-2xl: 2rem;
    --fs-3xl: 2.5rem;
    --fs-4xl: 3rem;
    --fs-5xl: 3.5rem;

    /* Espaciado */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Bordes */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --shadow-glow: 0 0 30px rgba(27, 77, 143, 0.3);

    /* Transiciones */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Header */
    --header-height: 4.5rem;
}

/* ─── Reset & Base ─── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    color: var(--color-gray-800);
    background-color: var(--color-white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ─── Container ─── */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ─── Section Base ─── */
.section {
    padding: var(--space-4xl) 0;
    position: relative;
}

.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.section__tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-lg);
    background: linear-gradient(135deg, rgba(27, 77, 143, 0.1), rgba(0, 168, 232, 0.1));
    color: var(--color-primary);
    font-size: var(--fs-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.section__title {
    font-family: var(--font-display);
    font-size: var(--fs-3xl);
    font-weight: 700;
    color: var(--color-black);
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

.section__description {
    font-size: var(--fs-md);
    color: var(--color-gray-600);
    line-height: 1.8;
}

/* ─── Gradient Text ─── */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.accent {
    color: var(--color-secondary);
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5em;
    font-weight: 600;
    font-size: var(--fs-sm);
    line-height: 1.2;
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    border: none;
    outline: none;
    cursor: pointer;
    white-space: nowrap;
    text-decoration: none;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    -webkit-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
}

.btn--sm {
    padding: 0.55rem 1.2rem;
    font-size: var(--fs-xs);
}

.btn--lg {
    padding: 0.9rem 2.2rem;
    font-size: var(--fs-base);
}

.btn--full {
    width: 100%;
    justify-content: center;
}

.btn--primary {
    background: linear-gradient(135deg, #0078D4 0%, #00A8E8 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(0, 120, 212, 0.35);
}

.btn--primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 22px rgba(0, 120, 212, 0.45);
}

.btn--primary:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(0, 120, 212, 0.3);
}

.btn--outline {
    background: rgba(255,255,255,0.12);
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.btn--outline:hover {
    background: #fff;
    color: var(--color-primary);
    border-color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 22px rgba(255,255,255,0.25);
}

.btn--whatsapp {
    background: #25D366;
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
}

.btn--whatsapp:hover {
    background: #1EBE5B;
    transform: translateY(-3px);
    box-shadow: 0 8px 22px rgba(37, 211, 102, 0.45);
}

.btn--whatsapp:active {
    transform: translateY(-1px);
}

/* ════════════════════════════════════════════════════════════════════
   HEADER / NAVEGACIÓN
   ════════════════════════════════════════════════════════════════════ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all var(--transition-base);
    background: transparent;
    /* Soporte iPhone notch / Dynamic Island */
    padding-top: env(safe-area-inset-top, 0px);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
}

.header.scrolled .nav__logo-text,
.header.scrolled .nav__link {
    color: var(--color-black);
}

.header.scrolled .nav__toggle i {
    color: var(--color-black);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    z-index: 1001;
}

.nav__logo-img {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.nav__logo-text {
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    font-weight: 700;
    color: var(--color-white);
    transition: var(--transition-base);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav__link {
    font-size: var(--fs-sm);
    font-weight: 500;
    color: rgba(255,255,255,0.9);
    transition: var(--transition-base);
    position: relative;
    padding: var(--space-xs) 0;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
    border-radius: var(--radius-full);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__link:hover {
    color: var(--color-secondary-light);
}

/* Enlace Intercambio destacado */
.nav__link--intercambio {
    background: linear-gradient(135deg, var(--color-secondary), #1EBE5B);
    color: #fff !important;
    padding: 0.35rem 0.9rem !important;
    border-radius: var(--radius-full);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    animation: intercambio-pulse 3s ease-in-out infinite;
}

.nav__link--intercambio::after { display: none !important; }

.nav__link--intercambio:hover {
    color: #fff !important;
    transform: scale(1.05);
    box-shadow: 0 4px 16px rgba(0, 168, 232, 0.4);
}

@keyframes intercambio-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 168, 232, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(0, 168, 232, 0); }
}

.header.scrolled .nav__link--intercambio {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff !important;
}

.header.scrolled .nav__link:hover {
    color: var(--color-primary);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.nav__toggle {
    display: none;
    font-size: var(--fs-xl);
    color: var(--color-white);
    z-index: 1001;
}

.nav__close {
    display: none;
}

.nav__cta {
    font-size: 0.8rem;
    padding: 0.5rem 1.1rem;
    letter-spacing: 0.02em;
}

.nav__mobile-actions {
    display: none;
}

/* ════════════════════════════════════════════════════════════════════
   HERO SECTION
   ════════════════════════════════════════════════════════════════════ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    /* IMAGEN_HERO: Cambia esta ruta por tu imagen real */
    background: url('../img/hero-bg.jpg') center/cover no-repeat;
    overflow: hidden;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(15, 52, 97, 0.92) 0%,
        rgba(27, 77, 143, 0.85) 40%,
        rgba(42, 106, 199, 0.8) 70%,
        rgba(0, 168, 232, 0.6) 100%
    );
    z-index: 1;
}

.hero__particles {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 3;
    text-align: center;
    width: 100%;
    max-width: 900px;
    padding-top: var(--header-height);
    box-sizing: border-box;
}

.hero__badge {
    display: inline-block;
    padding: var(--space-sm) var(--space-xl);
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
    color: var(--color-secondary-light);
    font-size: var(--fs-sm);
    font-weight: 600;
    margin-bottom: var(--space-xl);
    animation: pulse-badge 3s infinite;
}

@keyframes pulse-badge {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 168, 232, 0.3); }
    50% { box-shadow: 0 0 20px 5px rgba(0, 168, 232, 0.15); }
}

.hero__title {
    font-family: var(--font-display);
    font-size: var(--fs-5xl);
    font-weight: 800;
    color: var(--color-white);
    line-height: 1.15;
    margin-bottom: var(--space-xl);
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero__title .gradient-text {
    background: linear-gradient(135deg, #4DC9F6, #00A8E8, #FFFFFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: var(--fs-lg);
    color: rgba(255,255,255,0.9);
    line-height: 1.8;
    margin-bottom: var(--space-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Versiones desktop/mobile del subtítulo */
.hero__subtitle--mobile {
    display: none;
}

.hero__subtitle--desktop {
    display: block;
}

.hero__buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-3xl);
}

/* ─ Hero Stats ─ */
.hero__stats {
    display: flex;
    justify-content: center;
    gap: var(--space-3xl);
    flex-wrap: wrap;
}

.hero__stat {
    text-align: center;
    color: var(--color-white);
}

.hero__stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: var(--fs-4xl);
    font-weight: 800;
    color: var(--color-secondary-light);
    line-height: 1;
}

.hero__stat-top {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 2px;
    line-height: 1;
}

.hero__stat-suffix {
    font-family: var(--font-display);
    font-size: var(--fs-3xl);
    font-weight: 800;
    color: var(--color-secondary-light);
}

.hero__stat-label {
    font-size: var(--fs-sm);
    color: rgba(255,255,255,0.8);
    margin-top: var(--space-xs);
    display: block;
}

/* ─ Scroll Indicator ─ */
.hero__scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.hero__scroll-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: rgba(255,255,255,0.7);
    font-size: var(--fs-sm);
    animation: bounce-scroll 2s infinite;
}

@keyframes bounce-scroll {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* ════════════════════════════════════════════════════════════════════
   ABOUT / ¿QUIÉNES SOMOS?
   ════════════════════════════════════════════════════════════════════ */
.about {
    background: var(--color-gray-50);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about__image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about__image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.about__image:hover img {
    transform: scale(1.05);
}

.about__image-badge {
    position: absolute;
    bottom: 1.5rem;
    right: 1.5rem;
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.about__image-badge-number {
    display: block;
    font-family: var(--font-display);
    font-size: var(--fs-2xl);
    font-weight: 800;
}

.about__image-badge-text {
    font-size: var(--fs-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.about__text {
    color: var(--color-gray-700);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about__text strong {
    color: var(--color-primary);
}

.about__features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.about__feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.about__feature:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.about__feature-icon {
    width: 45px;
    height: 45px;
    min-width: 45px;
    background: linear-gradient(135deg, rgba(27, 77, 143, 0.1), rgba(0, 168, 232, 0.1));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: var(--fs-lg);
}

.about__feature h4 {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: 2px;
}

.about__feature p {
    font-size: var(--fs-xs);
    color: var(--color-gray-600);
}

/* ════════════════════════════════════════════════════════════════════
   MISIÓN & VISIÓN
   ════════════════════════════════════════════════════════════════════ */
.mission-vision {
    background: var(--color-white);
}

.mv__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.mv__card {
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.mv__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    border-radius: var(--radius-full);
}

.mv__card--mission {
    background: linear-gradient(135deg, rgba(27, 77, 143, 0.05), rgba(27, 77, 143, 0.02));
    border: 1px solid rgba(27, 77, 143, 0.1);
}

.mv__card--mission::before {
    background: var(--gradient-hero);
}

.mv__card--vision {
    background: linear-gradient(135deg, rgba(0, 168, 232, 0.05), rgba(0, 168, 232, 0.02));
    border: 1px solid rgba(0, 168, 232, 0.1);
}

.mv__card--vision::before {
    background: var(--gradient-warm);
}

.mv__card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.mv__card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-xl);
    margin-bottom: var(--space-lg);
}

.mv__card--mission .mv__card-icon {
    background: linear-gradient(135deg, rgba(27, 77, 143, 0.15), rgba(27, 77, 143, 0.05));
    color: var(--color-primary);
}

.mv__card--vision .mv__card-icon {
    background: linear-gradient(135deg, rgba(0, 168, 232, 0.15), rgba(0, 168, 232, 0.05));
    color: var(--color-secondary-dark);
}

.mv__card-title {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--color-black);
}

.mv__card-text {
    color: var(--color-gray-700);
    line-height: 1.8;
    font-size: var(--fs-sm);
}

.mv__quote {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--gradient-hero);
    border-radius: var(--radius-xl);
    position: relative;
}

.mv__quote blockquote {
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    color: var(--color-white);
    font-style: italic;
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto;
}

.mv__quote blockquote i {
    color: var(--color-secondary-light);
    margin: 0 var(--space-sm);
}

/* ════════════════════════════════════════════════════════════════════
   TIMELINE / HISTORIA
   ════════════════════════════════════════════════════════════════════ */
.timeline-section {
    background: var(--color-gray-50);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-xl) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-full);
}

.timeline__item {
    display: flex;
    justify-content: flex-end;
    padding: 0 0 var(--space-2xl) 0;
    position: relative;
    width: 50%;
}

.timeline__item:nth-child(odd) {
    align-self: flex-start;
    justify-content: flex-end;
    padding-right: var(--space-2xl);
}

.timeline__item:nth-child(even) {
    align-self: flex-end;
    margin-left: 50%;
    justify-content: flex-start;
    padding-left: var(--space-2xl);
}

.timeline__dot {
    position: absolute;
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border: 3px solid var(--color-white);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    z-index: 2;
}

.timeline__item:nth-child(odd) .timeline__dot {
    right: -9px;
}

.timeline__item:nth-child(even) .timeline__dot {
    left: -9px;
}

.timeline__content {
    background: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    max-width: 350px;
}

.timeline__content:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.timeline__year {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: 2px 12px;
    border-radius: var(--radius-full);
    font-size: var(--fs-xs);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.timeline__content h3 {
    font-family: var(--font-display);
    font-size: var(--fs-md);
    color: var(--color-black);
    margin-bottom: var(--space-xs);
}

.timeline__content p {
    font-size: var(--fs-sm);
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ════════════════════════════════════════════════════════════════════
   METODOLOGÍA
   ════════════════════════════════════════════════════════════════════ */
.methodology {
    background: var(--color-white);
}

.methodology__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.methodology__card {
    padding: var(--space-2xl);
    background: var(--color-gray-50);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.methodology__card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.methodology__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(27, 77, 143, 0.1);
    background: var(--color-white);
}

.methodology__card:hover::after {
    transform: scaleX(1);
}

.methodology__card-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--space-lg);
    background: linear-gradient(135deg, rgba(27, 77, 143, 0.1), rgba(0, 168, 232, 0.1));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-xl);
    color: var(--color-primary);
    transition: all var(--transition-base);
}

.methodology__card:hover .methodology__card-icon {
    background: var(--gradient-primary);
    color: var(--color-white);
    transform: rotate(5deg) scale(1.1);
}

.methodology__card h3 {
    font-family: var(--font-display);
    font-size: var(--fs-md);
    color: var(--color-black);
    margin-bottom: var(--space-sm);
}

.methodology__card p {
    font-size: var(--fs-sm);
    color: var(--color-gray-600);
    line-height: 1.7;
}

.methodology__banner {
    /* IMAGEN_METODOLOGIA: background-image para el banner */
    background: url('../img/methodology.jpg') center/cover no-repeat;
    border-radius: var(--radius-xl);
    overflow: hidden;
    position: relative;
}

.methodology__banner-content {
    background: linear-gradient(135deg, rgba(15, 52, 97, 0.9), rgba(27, 77, 143, 0.85));
    padding: var(--space-3xl);
    text-align: center;
}

.methodology__banner-content h3 {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    color: var(--color-secondary-light);
    margin-bottom: var(--space-md);
    font-style: italic;
}

.methodology__banner-content p {
    color: rgba(255,255,255,0.9);
    font-size: var(--fs-md);
}

/* ════════════════════════════════════════════════════════════════════
   NIVELES EDUCATIVOS
   ════════════════════════════════════════════════════════════════════ */
.levels {
    background: var(--color-gray-50);
}

.levels__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

.levels__card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.levels__card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.levels__card-header {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.levels__card-header img,
.levels__card-header video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.levels__card:hover .levels__card-header img,
.levels__card:hover .levels__card-header video {
    transform: scale(1.1);
}

.levels__card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: 4px 14px;
    border-radius: var(--radius-full);
    font-size: var(--fs-xs);
    font-weight: 700;
}

.levels__card-body {
    padding: var(--space-xl);
}

.levels__card-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(27, 77, 143, 0.1), rgba(0, 168, 232, 0.1));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-lg);
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.levels__card-body h3 {
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    color: var(--color-black);
    margin-bottom: var(--space-sm);
}

.levels__card-body p {
    font-size: var(--fs-sm);
    color: var(--color-gray-600);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.levels__card-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.levels__card-list li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--fs-sm);
    color: var(--color-gray-700);
}

.levels__card-list li i {
    color: var(--color-accent);
    font-size: var(--fs-xs);
}

/* ════════════════════════════════════════════════════════════════════
   SEDE CAMPESTRE / GALERÍA
   ════════════════════════════════════════════════════════════════════ */
.campus {
    background: var(--color-white);
}

.campus__gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto auto;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.campus__gallery-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
}

.campus__gallery-item--large {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
}

.campus__gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 200px;
    transition: transform var(--transition-slow);
}

.campus__gallery-item--large img {
    min-height: 100%;
}

.campus__gallery-item:hover img {
    transform: scale(1.08);
}

.campus__gallery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 52, 97, 0.85) 0%, transparent 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-lg);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.campus__gallery-item:hover .campus__gallery-overlay {
    opacity: 1;
}

.campus__gallery-overlay h4 {
    color: var(--color-white);
    font-family: var(--font-display);
    font-size: var(--fs-md);
}

.campus__gallery-overlay p {
    color: rgba(255,255,255,0.8);
    font-size: var(--fs-sm);
}

.campus__features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
}

.campus__feature {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-gray-50);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-200);
}

.campus__feature:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.campus__feature i {
    font-size: var(--fs-md);
    color: var(--color-primary);
    transition: color var(--transition-base);
}

.campus__feature:hover i {
    color: var(--color-secondary-light);
}

/* ════════════════════════════════════════════════════════════════════
   VALORES
   ════════════════════════════════════════════════════════════════════ */
.values {
    background: var(--color-gray-50);
}

.values__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.values__card {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-200);
    position: relative;
    overflow: hidden;
}

.values__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

.values__card:hover::before {
    width: 100%;
}

.values__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(27, 77, 143, 0.15);
}

.values__card-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--space-lg);
    background: linear-gradient(135deg, rgba(27, 77, 143, 0.08), rgba(0, 168, 232, 0.08));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-xl);
    color: var(--color-primary);
    transition: all var(--transition-base);
}

.values__card:hover .values__card-icon {
    background: var(--gradient-primary);
    color: var(--color-white);
    transform: scale(1.1) rotate(5deg);
}

.values__card h3 {
    font-family: var(--font-display);
    font-size: var(--fs-md);
    color: var(--color-black);
    margin-bottom: var(--space-sm);
}

.values__card p {
    font-size: var(--fs-sm);
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ════════════════════════════════════════════════════════════════════
   COMUNIDAD Y FUTURO
   ════════════════════════════════════════════════════════════════════ */
.community {
    background: var(--color-white);
}

.community__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
}

.community__block .section__title {
    text-align: left;
    font-size: var(--fs-2xl);
}

.community__items {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.community__item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.community__item:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.community__item i {
    font-size: var(--fs-xl);
    color: var(--color-primary);
    width: 50px;
    text-align: center;
}

.community__item h4 {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: 2px;
}

.community__item p {
    font-size: var(--fs-xs);
    color: var(--color-gray-600);
}

.community__future {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.community__future-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    font-size: var(--fs-sm);
    color: var(--color-gray-700);
    transition: all var(--transition-base);
    border-radius: var(--radius-md);
}

.community__future-item:hover {
    background: var(--color-gray-50);
    transform: translateX(5px);
}

.community__future-item i {
    color: var(--color-accent);
    font-size: var(--fs-md);
}

/* ════════════════════════════════════════════════════════════════════
   INTERCAMBIO PROMO (Sección en index.html)
   ════════════════════════════════════════════════════════════════════ */
.intercambio-promo {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0a2e5c 0%, #1B4D8F 40%, #00648c 100%);
    color: var(--color-white);
}

.intercambio-promo__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 15% 85%, rgba(0, 168, 232, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 85% 15%, rgba(30, 190, 91, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255,255,255,0.03) 0%, transparent 70%);
    pointer-events: none;
}

.intercambio-promo__wrapper {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 3rem;
    position: relative;
    z-index: 2;
}

.intercambio-promo__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(10px);
    padding: 0.45rem 1.1rem;
    border-radius: var(--radius-full);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: rgba(255,255,255,0.9);
    border: 1px solid rgba(255,255,255,0.15);
    margin-bottom: 1.25rem;
}

.intercambio-promo__badge i {
    color: #4dd9ff;
}

.intercambio-promo__title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 1rem;
}

.intercambio-promo__title .gradient-text {
    background: linear-gradient(135deg, #4dd9ff, #1EBE5B);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.intercambio-promo__text {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    line-height: 1.7;
    color: rgba(255,255,255,0.85);
    margin-bottom: 1.5rem;
    max-width: 580px;
}

.intercambio-promo__text strong {
    color: #fff;
}

.intercambio-promo__features {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem 1.5rem;
    margin-bottom: 2rem;
}

.intercambio-promo__features li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: var(--fs-sm);
    color: rgba(255,255,255,0.9);
}

.intercambio-promo__features li i {
    color: #4dd9ff;
    font-size: 1rem;
    flex-shrink: 0;
}

.btn--intercambio-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: linear-gradient(135deg, #1EBE5B, #00A8E8);
    color: #fff;
    font-weight: 600;
    padding: 0.85rem 2rem;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    font-size: var(--fs-base);
    box-shadow: 0 4px 20px rgba(30, 190, 91, 0.35);
}

.btn--intercambio-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(30, 190, 91, 0.45);
}

.btn--intercambio-cta i {
    transition: transform 0.3s ease;
}

.btn--intercambio-cta:hover i {
    transform: translateX(4px);
}

/* Visual globe + flags */
.intercambio-promo__visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.intercambio-promo__globe {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0,168,232,0.25), rgba(30,190,91,0.2));
    border: 2px solid rgba(255,255,255,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: globe-float 4s ease-in-out infinite;
}

.intercambio-promo__globe i {
    font-size: 4.5rem;
    background: linear-gradient(135deg, #4dd9ff, #1EBE5B);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes globe-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.intercambio-promo__flags {
    display: flex;
    gap: 0.75rem;
}

.intercambio-promo__flag {
    font-size: 2rem;
    background: rgba(255,255,255,0.1);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.15);
    transition: transform 0.3s ease;
}

.intercambio-promo__flag:hover {
    transform: scale(1.15);
}

/* ════════════════════════════════════════════════════════════════════
   CTA
   ════════════════════════════════════════════════════════════════════ */
.cta-section {
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.cta__bg-shapes {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(0, 168, 232, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 50%);
    pointer-events: none;
}

.cta__content {
    text-align: center;
    position: relative;
    z-index: 2;
    padding: var(--space-2xl) 0;
}

.cta__content h2 {
    font-family: var(--font-display);
    font-size: var(--fs-3xl);
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.cta__content h2 .gradient-text {
    background: linear-gradient(135deg, #4DC9F6, #FFFFFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta__content p {
    font-size: var(--fs-lg);
    color: rgba(255,255,255,0.9);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta__buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ════════════════════════════════════════════════════════════════════
   CONTACTO
   ════════════════════════════════════════════════════════════════════ */
.contact {
    background: var(--color-gray-50);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.contact__card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-200);
}

.contact__card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
    border-color: rgba(27, 77, 143, 0.15);
}

.contact__card--whatsapp {
    border-color: rgba(37, 211, 102, 0.3);
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.05), rgba(37, 211, 102, 0.02));
}

.contact__card--whatsapp:hover {
    border-color: #25D366;
}

.contact__card-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    background: linear-gradient(135deg, rgba(27, 77, 143, 0.1), rgba(27, 77, 143, 0.05));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-lg);
    color: var(--color-primary);
}

.contact__card--whatsapp .contact__card-icon {
    background: rgba(37, 211, 102, 0.1);
    color: #25D366;
}

.contact__card h4 {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: 4px;
}

.contact__card p {
    font-size: var(--fs-sm);
    color: var(--color-gray-600);
}

.contact__card a {
    color: var(--color-primary);
    font-weight: 500;
}

.contact__card a:hover {
    color: var(--color-secondary-dark);
}

.contact__map {
    margin-top: var(--space-lg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.contact__map img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

/* ─ Formulario ─ */
.contact__form-wrapper {
    background: var(--color-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
}

.contact__form h3 {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    color: var(--color-black);
    margin-bottom: var(--space-sm);
}

.contact__form > p {
    color: var(--color-gray-600);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-xl);
}

.form__group {
    margin-bottom: var(--space-lg);
}

.form__group label {
    display: block;
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-sm);
}

.form__group input,
.form__group textarea,
.form__group select {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background: var(--color-gray-50);
    color: var(--color-gray-800);
    transition: all var(--transition-base);
    outline: none;
}

.form__group input:focus,
.form__group textarea:focus,
.form__group select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(27, 77, 143, 0.1);
    background: var(--color-white);
}

.form__group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ════════════════════════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════════════════════════ */
.footer {
    background: var(--color-black);
    color: rgba(255,255,255,0.8);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.footer__logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.footer__logo span {
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    font-weight: 700;
    color: var(--color-white);
}

.footer__brand p {
    font-size: var(--fs-sm);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.footer__social {
    display: flex;
    gap: var(--space-sm);
}

.footer__social a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    transition: all var(--transition-base);
}

.footer__social a:hover {
    background: var(--gradient-primary);
    color: var(--color-white);
    transform: translateY(-3px);
}

.footer__links h4,
.footer__contact h4 {
    font-size: var(--fs-base);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
    position: relative;
    padding-bottom: var(--space-sm);
}

.footer__links h4::after,
.footer__contact h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--gradient-warm);
    border-radius: var(--radius-full);
}

.footer__links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__links a {
    font-size: var(--fs-sm);
    color: rgba(255,255,255,0.7);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer__links a::before {
    content: '›';
    color: var(--color-secondary);
}

.footer__links a:hover {
    color: var(--color-secondary-light);
    transform: translateX(5px);
}

.footer__contact p {
    font-size: var(--fs-sm);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer__contact p i {
    color: var(--color-secondary);
    width: 16px;
    text-align: center;
}

.footer__contact a {
    color: rgba(255,255,255,0.7);
}

.footer__contact a:hover {
    color: var(--color-secondary-light);
}

.footer__bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer__bottom p {
    font-size: var(--fs-xs);
    color: rgba(255,255,255,0.5);
}

/* ════════════════════════════════════════════════════════════════════
   WHATSAPP FLOTANTE
   ════════════════════════════════════════════════════════════════════ */
.whatsapp-float {
    position: fixed;
    bottom: 2rem;
    bottom: calc(2rem + env(safe-area-inset-bottom, 0px));
    right: 1.5rem;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #128C7E 0%, #25D366 60%, #1EBE5B 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow:
        0 6px 24px rgba(37, 211, 102, 0.55),
        0 2px 8px rgba(0,0,0,0.2),
        inset 0 1px 0 rgba(255,255,255,0.25);
    z-index: 999;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    animation: wa-glow 2.8s ease-in-out infinite;
    -webkit-tap-highlight-color: transparent;
}

@keyframes wa-glow {
    0%, 100% {
        box-shadow:
            0 6px 24px rgba(37, 211, 102, 0.55),
            0 2px 8px rgba(0,0,0,0.2),
            0 0 0 0px rgba(37, 211, 102, 0.4);
    }
    50% {
        box-shadow:
            0 6px 24px rgba(37, 211, 102, 0.55),
            0 2px 8px rgba(0,0,0,0.2),
            0 0 0 10px rgba(37, 211, 102, 0);
    }
}

.whatsapp-float:hover {
    transform: scale(1.12) translateY(-3px);
    box-shadow:
        0 12px 36px rgba(37, 211, 102, 0.65),
        0 4px 12px rgba(0,0,0,0.25);
}

.whatsapp-float i {
    font-size: 32px;
    color: var(--color-white);
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.25));
}

/* Anillo pulsante decorativo */
.whatsapp-float::before {
    content: '';
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    border: 2.5px solid rgba(37, 211, 102, 0.5);
    animation: wa-ring 2.8s ease-in-out infinite;
}

@keyframes wa-ring {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.15); opacity: 0; }
}

/* Etiqueta "¡Escríbenos!" en desktop */
.whatsapp-float::after {
    content: '¡Escríbenos!';
    position: absolute;
    right: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%) translateX(8px);
    background: #fff;
    color: #128C7E;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 0.35rem 0.75rem;
    border-radius: 50px;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    border-left: 3px solid #25D366;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.whatsapp-float:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}

/* Tooltip removed — only CSS ::after hover label used */

/* ════════════════════════════════════════════════════════════════════
   SCROLL TO TOP
   ════════════════════════════════════════════════════════════════════ */
.scroll-top {
    position: fixed;
    bottom: calc(2rem + 64px + 14px);
    right: 1.5rem;
    width: 45px;
    height: 45px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ════════════════════════════════════════════════════════════════════
   GALERÍA FOTOGRÁFICA (Masonry Grid)
   ════════════════════════════════════════════════════════════════════ */
.photo-gallery {
    background: var(--color-white);
}

.photo-gallery__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 220px;
    gap: var(--space-md);
}

.photo-gallery__item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
}

.photo-gallery__item--wide {
    grid-column: span 2;
}

.photo-gallery__item--tall {
    grid-row: span 2;
}

.photo-gallery__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease, filter 0.4s ease;
}

.photo-gallery__item:hover img {
    transform: scale(1.08);
    filter: brightness(1.05);
}

.photo-gallery__caption {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 52, 97, 0.8) 0%, transparent 50%);
    display: flex;
    align-items: flex-end;
    padding: var(--space-lg);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.photo-gallery__item:hover .photo-gallery__caption {
    opacity: 1;
}

.photo-gallery__caption span {
    color: var(--color-white);
    font-weight: 600;
    font-size: var(--fs-md);
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* ─ Galería responsive (tablet) ─ */
@media (max-width: 992px) {
    .photo-gallery__grid {
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: 200px;
    }
    .photo-gallery__item--tall {
        grid-row: span 1;
    }
}

/* ════════════════════════════════════════════════════════════════════
   ANIMACIONES DE PARTÍCULAS (HERO)
   ════════════════════════════════════════════════════════════════════ */
.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    pointer-events: none;
    animation: float-particle linear infinite;
}

@keyframes float-particle {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) rotate(720deg);
        opacity: 0;
    }
}

/* ════════════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ════════════════════════════════════════════════════════════════════ */

/* ─── Tablet (768px) ─── */
@media (max-width: 992px) {
    :root {
        --fs-5xl: 2.5rem;
        --fs-4xl: 2.2rem;
        --fs-3xl: 2rem;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        height: 100dvh;
        background: var(--color-white);
        box-shadow: -6px 0 40px rgba(0,0,0,0.22);
        padding: 4.5rem 0 2rem;
        transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        display: flex;
        flex-direction: column;
        overflow-y: auto;
    }

    .nav__menu.active {
        right: 0;
    }

    .nav__list {
        flex-direction: column;
        gap: 0;
        padding: 0.75rem 1.5rem;
    }

    .nav__link {
        color: var(--color-gray-700);
        font-size: 0.925rem;
        font-weight: 500;
        padding: 0.7rem 0.5rem;
        border-bottom: 1px solid rgba(0,0,0,0.06);
        display: flex;
        align-items: center;
        gap: 0.5rem;
        transition: color 0.2s ease, padding-left 0.2s ease;
    }

    .nav__link:hover {
        color: var(--color-primary);
        padding-left: 0.75rem;
    }

    .nav__link.active {
        color: var(--color-secondary);
        font-weight: 700;
        padding-left: 0.5rem;
    }

    .nav__link::after {
        display: none;
    }

    .nav__link--intercambio {
        background: linear-gradient(135deg, var(--color-secondary), #1EBE5B);
        color: #fff !important;
        padding: 0.65rem 1rem !important;
        border-radius: var(--radius-lg);
        margin: 0.5rem 0;
        justify-content: center;
        font-weight: 700;
        font-size: 0.95rem;
        border-bottom: none;
    }

    .nav__link--intercambio:hover {
        color: #fff !important;
        padding-left: 1rem !important;
    }

    .nav__mobile-actions {
        display: flex;
        flex-direction: column;
        gap: 0.625rem;
        margin-top: auto;
        padding: 1.25rem 1.5rem calc(1.25rem + env(safe-area-inset-bottom, 0px));
        border-top: 1px solid rgba(0,0,0,0.06);
        background: linear-gradient(to bottom, transparent, rgba(27, 77, 143, 0.03));
    }

    .nav__close {
        display: flex;
        align-items: center;
        justify-content: center;
        position: absolute;
        top: 0.875rem;
        right: 1rem;
        width: 38px;
        height: 38px;
        border-radius: 10px;
        background: rgba(27, 77, 143, 0.08);
        font-size: 1.1rem;
        color: var(--color-gray-700);
        transition: background 0.2s ease, color 0.2s ease;
    }

    .nav__close:hover {
        background: rgba(27, 77, 143, 0.15);
        color: var(--color-primary);
    }

    .nav__toggle {
        display: block;
    }

    .nav__cta {
        display: none;
    }

    .about__grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .mv__grid {
        grid-template-columns: 1fr;
    }

    .levels__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .community__grid {
        grid-template-columns: 1fr;
    }

    /* Intercambio promo responsive tablet */
    .intercambio-promo__wrapper {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .intercambio-promo__text {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

    .intercambio-promo__features {
        justify-items: center;
    }

    .intercambio-promo__visual {
        order: -1;
    }

    .intercambio-promo__globe {
        width: 120px;
        height: 120px;
    }

    .intercambio-promo__globe i {
        font-size: 3.5rem;
    }

    .contact__grid {
        grid-template-columns: 1fr;
    }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-2xl);
    }

    /* Timeline responsive */
    .timeline::before {
        left: 30px;
    }

    .timeline__item,
    .timeline__item:nth-child(odd),
    .timeline__item:nth-child(even) {
        width: 100%;
        margin-left: 0;
        padding-left: 70px;
        padding-right: 0;
        justify-content: flex-start;
    }

    .timeline__item:nth-child(odd) .timeline__dot,
    .timeline__item:nth-child(even) .timeline__dot {
        left: 22px;
        right: auto;
    }

    .timeline__content {
        max-width: 100%;
    }
}

/* ─── Móvil (576px) — Diseño profesional mobile-first ─── */
@media (max-width: 576px) {

    /* ════ TOKENS MOBILE ════ */
    :root {
        --fs-5xl: 1.75rem;
        --fs-4xl: 1.45rem;
        --fs-3xl: 1.3rem;
        --fs-2xl: 1.15rem;
        --fs-xl: 1.1rem;
        --fs-lg: 1.05rem;
        --space-4xl: 2.75rem;
        --space-3xl: 2.25rem;
        --space-2xl: 1.75rem;
        --header-height: 3.75rem;
    }

    .container {
        padding: 0 1.125rem;
    }

    /* ════ HEADER ════ */
    .header {
        --header-height: 3.75rem;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }

    .nav__logo-img {
        width: 32px;
        height: 32px;
    }

    .nav__logo-text {
        font-size: 1.05rem;
        font-weight: 700;
    }

    .nav__toggle {
        width: 44px;
        height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.3rem;
    }

    /* ════ HERO ════ */
    .hero {
        min-height: 100svh;
        min-height: -webkit-fill-available;
    }

    .hero__overlay {
        background: linear-gradient(
            170deg,
            rgba(5, 24, 65, 0.97) 0%,
            rgba(10, 48, 115, 0.93) 30%,
            rgba(15, 80, 165, 0.86) 60%,
            rgba(0, 130, 200, 0.70) 100%
        );
    }

    .hero__content {
        padding: calc(var(--header-height) + env(safe-area-inset-top, 0px) + 1.75rem) 1.25rem 2rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 100%;
        box-sizing: border-box;
        gap: 0;
    }

    .hero__badge {
        font-size: 0.68rem;
        font-weight: 700;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        padding: 0.45rem 1.25rem;
        margin-bottom: 1.1rem;
        background: rgba(0, 168, 232, 0.18);
        border: 1px solid rgba(77, 201, 246, 0.55);
        box-shadow: 0 0 20px rgba(0, 168, 232, 0.25), inset 0 1px 0 rgba(255,255,255,0.12);
        color: #7DDCFF;
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
    }

    .hero__title {
        font-size: clamp(1.65rem, 7.5vw, 2.25rem);
        line-height: 1.18;
        letter-spacing: -0.025em;
        margin-bottom: 0.875rem;
        text-shadow: 0 2px 12px rgba(0,0,0,0.35);
    }

    .hero__subtitle--desktop { display: none; }
    .hero__subtitle--mobile  { display: block; }

    .hero__subtitle {
        font-size: 0.875rem;
        line-height: 1.65;
        margin-bottom: 1.375rem;
        opacity: 0.92;
        max-width: 90%;
    }

    .hero__buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 0.625rem;
        padding: 0;
        margin-bottom: 1.375rem;
        width: 100%;
    }

    .hero__buttons .btn {
        width: 100%;
        justify-content: center;
        font-size: 0.92rem;
        font-weight: 700;
        letter-spacing: 0.04em;
        border-radius: 50px;
        -webkit-tap-highlight-color: transparent;
    }

    .hero__buttons .btn--primary {
        padding: 1rem 1.5rem;
        background: linear-gradient(135deg, #0055CC 0%, #0095E8 55%, #00C4FF 100%);
        box-shadow: 0 10px 30px rgba(0, 149, 232, 0.55), 0 3px 8px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.2);
        border: none;
        transition: transform 0.15s ease, box-shadow 0.15s ease;
    }

    .hero__buttons .btn--primary:active {
        transform: translateY(2px);
        box-shadow: 0 4px 12px rgba(0, 149, 232, 0.4);
    }

    .hero__buttons .btn--outline {
        padding: 0.9rem 1.5rem;
        border: 1.5px solid rgba(255,255,255,0.45);
        background: rgba(255,255,255,0.07);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        color: rgba(255,255,255,0.95);
    }

    .hero__stats {
        width: 100%;
        display: flex;
        flex-direction: row;
        gap: 0;
        margin: 0;
        background: rgba(255,255,255,0.1);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        border: 1px solid rgba(255,255,255,0.18);
        border-radius: 18px;
        padding: 0.875rem 0;
        box-shadow: 0 10px 40px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.15);
        overflow: hidden;
    }

    .hero__stat {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.25rem;
        padding: 0.25rem 0.375rem;
        border-right: 1px solid rgba(255,255,255,0.15);
    }

    .hero__stat:last-child { border-right: none; }

    .hero__stat-top {
        display: flex;
        align-items: baseline;
        gap: 1px;
        justify-content: center;
        line-height: 1;
    }

    .hero__stat-number {
        font-size: 1.65rem;
        font-weight: 800;
        color: #5CD6FF;
        text-shadow: 0 0 16px rgba(92, 214, 255, 0.45);
        line-height: 1;
    }

    .hero__stat-suffix {
        font-size: 1.05rem;
        font-weight: 800;
        color: #5CD6FF;
        line-height: 1;
    }

    .hero__stat-label {
        font-size: 0.6rem;
        color: rgba(255,255,255,0.82);
        text-align: center;
        line-height: 1.25;
        letter-spacing: 0.02em;
        margin-top: 0;
    }

    .hero__scroll { display: none; }

    /* ════ SECCIONES ════ */
    .section { padding: 2.75rem 0; }
    .section__header { margin-bottom: 1.75rem; }

    .section__tag {
        font-size: 0.65rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        padding: 0.3rem 1rem;
        background: linear-gradient(135deg, #1B4D8F 0%, #00A8E8 100%);
        color: #fff;
        border: none;
        box-shadow: 0 4px 14px rgba(0, 140, 210, 0.35);
    }

    .section__title {
        font-size: clamp(1.25rem, 5.5vw, 1.65rem);
        line-height: 1.3;
    }

    .section__description {
        font-size: 0.875rem;
        line-height: 1.65;
    }

    /* ════ ABOUT ════ */
    .about__grid { gap: 1.5rem; }

    .about__image {
        border-radius: var(--radius-lg);
        box-shadow: 0 12px 35px rgba(27, 77, 143, 0.22);
    }

    .about__image img { height: 240px; }

    .about__image-badge {
        bottom: 1rem;
        right: 1rem;
        padding: 0.6rem 1rem;
        border-radius: var(--radius-md);
    }

    .about__image-badge-number { font-size: var(--fs-xl); }
    .about__text { font-size: 0.875rem; line-height: 1.75; }

    .about__features {
        grid-template-columns: 1fr;
        gap: 0.625rem;
    }

    .about__feature {
        padding: 0.875rem 1rem;
        border-left: 3px solid var(--color-secondary);
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        background: linear-gradient(to right, rgba(0, 168, 232, 0.05), transparent);
    }

    .about__feature-icon { width: 38px; height: 38px; min-width: 38px; font-size: 1rem; }

    /* ════ MISIÓN / VISIÓN ════ */
    .mv__card {
        padding: 1.375rem;
        border-radius: var(--radius-lg);
        box-shadow: 0 6px 22px rgba(0,0,0,0.07);
    }

    .mv__card--mission {
        border-left: 4px solid #1B4D8F;
        background: linear-gradient(to right, rgba(27, 77, 143, 0.04), transparent);
    }

    .mv__card--vision {
        border-left: 4px solid #00A8E8;
        background: linear-gradient(to right, rgba(0, 168, 232, 0.04), transparent);
    }

    .mv__card-icon { width: 46px; height: 46px; font-size: 1.1rem; margin-bottom: 0.875rem; }
    .mv__card-title { font-size: var(--fs-lg); margin-bottom: 0.5rem; }
    .mv__card-text { font-size: 0.84rem; line-height: 1.7; }
    .mv__quote { border-radius: var(--radius-lg); padding: 1.375rem; }
    .mv__quote blockquote { font-size: 0.9rem; line-height: 1.7; }

    /* ════ TIMELINE ════ */
    .timeline__item,
    .timeline__item:nth-child(odd),
    .timeline__item:nth-child(even) { padding-left: 62px; }

    .timeline__content {
        padding: 1rem 1.125rem;
        border-left: 3px solid var(--color-secondary);
        border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
        box-shadow: 0 4px 18px rgba(0,0,0,0.08);
        background: #fff;
    }

    .timeline__content h3 { font-size: 0.9rem; font-weight: 700; margin-bottom: 0.3rem; }
    .timeline__content p  { font-size: 0.8rem; line-height: 1.6; }
    .timeline__year { font-size: 0.65rem; padding: 2px 10px; margin-bottom: 0.375rem; }

    /* ════ METODOLOGÍA ════ */
    .methodology__grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .methodology__card {
        padding: 1.125rem 0.875rem;
        border-top: 3px solid #00A8E8;
        border-radius: var(--radius-lg);
        box-shadow: 0 4px 16px rgba(0,0,0,0.07);
        text-align: center;
        background: #fff;
    }

    .methodology__card-icon {
        width: 46px;
        height: 46px;
        min-width: 46px;
        margin: 0 auto 0.625rem;
        background: var(--gradient-primary);
        color: #fff;
        border-radius: 12px;
        font-size: 1rem;
    }

    .methodology__card h3 { font-size: 0.78rem; font-weight: 700; margin-bottom: 0.25rem; }
    .methodology__card p  { font-size: 0.72rem; line-height: 1.55; color: var(--color-gray-600); }
    .methodology__banner-content { padding: 1.5rem 1.25rem; border-radius: var(--radius-lg); }
    .methodology__banner-content h3 { font-size: var(--fs-xl); }
    .methodology__banner-content p  { font-size: 0.875rem; }

    /* ════ NIVELES — layout horizontal en mobile ════ */
    .levels__grid { grid-template-columns: 1fr; gap: 1rem; }

    .levels__card {
        display: flex;
        flex-direction: row;
        align-items: stretch;
        border-radius: var(--radius-lg);
        overflow: hidden;
    }

    .levels__card-header {
        width: 110px;
        min-width: 110px;
        height: auto;
        flex-shrink: 0;
    }

    .levels__card-header img,
    .levels__card-header video { width: 100%; height: 100%; object-fit: cover; }
    .levels__card-body { padding: 0.875rem 1rem; flex: 1; }
    .levels__card-badge { font-size: 0.6rem; padding: 2px 8px; }
    .levels__card-icon { width: 34px; height: 34px; font-size: 0.9rem; margin-bottom: 0.375rem; }
    .levels__card-body h3 { font-size: 0.9rem; margin-bottom: 0.25rem; }
    .levels__card-body p  { font-size: 0.75rem; line-height: 1.55; margin-bottom: 0.5rem; }
    .levels__card-list li { font-size: 0.72rem; gap: 0.3rem; }

    /* ════ CAMPUS ════ */
    .campus__gallery {
        grid-template-columns: 1fr 1fr;
        grid-auto-rows: 180px;
        gap: 0.625rem;
    }

    .campus__gallery-item--large { grid-column: span 2; grid-row: auto; height: 200px; }
    .campus__gallery-item { height: 100%; }
    .campus__gallery-item img { min-height: 100%; height: 100%; }
    .campus__gallery-item--large img { min-height: 100%; height: 100%; }
    .campus__features { gap: 0.5rem; justify-content: flex-start; }

    .campus__feature {
        font-size: 0.75rem;
        padding: 0.55rem 0.875rem;
        border-radius: var(--radius-full);
        background: linear-gradient(to right, rgba(27, 77, 143, 0.07), rgba(0, 168, 232, 0.05));
        border: 1px solid rgba(0, 168, 232, 0.2);
    }

    /* ════ VALORES ════ */
    .values__grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }

    .values__card {
        padding: 1.125rem 0.875rem;
        border-radius: var(--radius-lg);
        border: none;
        border-top: 3px solid var(--color-secondary);
        background: linear-gradient(145deg, #ffffff, #f4f8ff);
        box-shadow: 0 6px 20px rgba(27, 77, 143, 0.1);
    }

    .values__card::before { display: none; }

    .values__card-icon {
        width: 46px;
        height: 46px;
        min-width: 46px;
        font-size: 1rem;
        margin: 0 auto 0.625rem;
        background: var(--gradient-primary);
        color: #fff;
        border-radius: 12px;
    }

    .values__card h3 { font-size: 0.82rem; font-weight: 700; margin-bottom: 0.25rem; }
    .values__card p  { font-size: 0.72rem; line-height: 1.55; }

    /* ════ COMUNIDAD ════ */
    .community__item {
        padding: 0.875rem 1rem;
        border-left: 3px solid var(--color-secondary);
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        background: linear-gradient(to right, rgba(0, 168, 232, 0.05), transparent);
        box-shadow: 0 3px 12px rgba(0,0,0,0.06);
    }

    .community__item i  { width: 32px; font-size: 1rem; color: var(--color-secondary); text-align: center; }
    .community__item h4 { font-size: 0.85rem; }
    .community__item p  { font-size: 0.77rem; }
    .community__future-item { font-size: 0.82rem; padding: 0.5rem 0.625rem; }

    /* ════ INTERCAMBIO PROMO ════ */
    .intercambio-promo__wrapper {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1.5rem;
    }

    .intercambio-promo__text {
        max-width: 100%;
    }

    .intercambio-promo__features {
        grid-template-columns: 1fr;
        gap: 0.625rem;
        text-align: left;
    }

    .intercambio-promo__features li {
        font-size: 0.82rem;
    }

    .intercambio-promo__visual {
        order: -1;
    }

    .intercambio-promo__globe {
        width: 100px;
        height: 100px;
    }

    .intercambio-promo__globe i {
        font-size: 2.8rem;
    }

    .intercambio-promo__flag {
        width: 40px;
        height: 40px;
        font-size: 1.6rem;
    }

    .btn--intercambio-cta {
        width: 100%;
        justify-content: center;
        padding: 0.9rem 1.5rem;
        font-size: 0.92rem;
        font-weight: 700;
    }

    /* ════ CTA ════ */
    .cta__content { padding: 1.5rem 0; }
    .cta__content h2 { font-size: clamp(1.25rem, 5.5vw, 1.65rem); line-height: 1.3; margin-bottom: 0.75rem; }
    .cta__content p  { font-size: 0.875rem; margin-bottom: 1.5rem; }

    .cta__buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 0.625rem;
        padding: 0;
    }

    .cta__buttons .btn { width: 100%; justify-content: center; font-size: 0.92rem; font-weight: 700; }

    /* ════ CONTACTO ════ */
    .contact__card {
        padding: 0.875rem 1rem;
        gap: 0.875rem;
        border: none;
        border-left: 3px solid var(--color-secondary);
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        box-shadow: 0 4px 14px rgba(0,0,0,0.07);
        margin-bottom: 0.625rem;
    }

    .contact__card--whatsapp { border-left-color: #25D366; }

    .contact__card-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
        font-size: 1rem;
        background: var(--gradient-primary);
        color: #fff;
        border-radius: 10px;
    }

    .contact__card--whatsapp .contact__card-icon {
        background: linear-gradient(135deg, #128C7E, #25D366);
    }

    .contact__card h4 { font-size: 0.8rem; font-weight: 700; }
    .contact__card p, .contact__card a { font-size: 0.77rem; }
    .contact__map img { height: 175px; border-radius: var(--radius-lg); }

    .contact__form-wrapper {
        padding: 1.375rem 1.125rem;
        border-radius: var(--radius-xl);
        box-shadow: 0 8px 32px rgba(27, 77, 143, 0.13);
        border: 1px solid rgba(27, 77, 143, 0.1);
    }

    .contact__form h3 { font-size: 1.2rem; }
    .contact__form > p { font-size: 0.82rem; margin-bottom: 1.125rem; }
    .form__group { margin-bottom: 0.875rem; }
    .form__group label { font-size: 0.8rem; margin-bottom: 0.3rem; }

    .form__group input,
    .form__group textarea,
    .form__group select {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
        border-radius: var(--radius-md);
    }

    .form__group textarea { min-height: 90px; }

    /* ════ FOOTER ════ */
    .footer { padding: 2.5rem 0 1.5rem; }
    .footer__grid { grid-template-columns: 1fr; gap: 1.75rem; }
    .footer__logo-img { width: 34px; height: 34px; }
    .footer__logo span { font-size: var(--fs-lg); }
    .footer__brand p { font-size: 0.8rem; line-height: 1.7; }
    .footer__links h4, .footer__contact h4 { font-size: 0.9rem; margin-bottom: 0.875rem; }
    .footer__links a, .footer__contact p { font-size: 0.8rem; }
    .footer__bottom { flex-direction: column; text-align: center; gap: 0.375rem; padding-top: 1.25rem; }
    .footer__bottom p { font-size: 0.72rem; }

    /* ════ WHATSAPP FLOAT ════ */
    .whatsapp-float {
        bottom: max(1.5rem, env(safe-area-inset-bottom, 1.5rem));
        right: 1rem;
        width: 58px;
        height: 58px;
        box-shadow:
            0 6px 22px rgba(37, 211, 102, 0.6),
            0 2px 8px rgba(0,0,0,0.2);
    }

    .whatsapp-float i { font-size: 28px; }
    .whatsapp-float::after { display: none; }

    .scroll-top {
        bottom: calc(max(1.5rem, env(safe-area-inset-bottom, 1.5rem)) + 58px + 12px);
        right: 1rem;
        width: 40px;
        height: 40px;
        font-size: 0.85rem;
    }

    /* ════ GALERÍA ════ */
    .photo-gallery__grid {
        grid-template-columns: 1fr 1fr;
        grid-auto-rows: 155px;
        gap: 0.5rem;
    }

    .photo-gallery__item--wide { grid-column: span 2; }
    .photo-gallery__item--tall { grid-row: span 1; }
    .photo-gallery__item:last-child:nth-child(odd) { grid-column: 1 / -1; }
    .photo-gallery__caption { opacity: 1; padding: 0.625rem; }
    .photo-gallery__caption span { font-size: 0.75rem; }
}
/* ─── Pantallas muy pequeñas (≤400px) ─── */
@media (max-width: 400px) {
    :root {
        --fs-5xl: 1.5rem;
        --fs-4xl: 1.3rem;
        --fs-3xl: 1.15rem;
        --space-4xl: 2.25rem;
        --space-3xl: 1.75rem;
    }

    .container {
        padding: 0 1rem;
    }

    /* Hero */
    .hero__title {
        font-size: clamp(1.45rem, 7vw, 1.85rem);
    }

    .hero__stat-number {
        font-size: 1.35rem;
    }

    .hero__stat-suffix {
        font-size: 0.95rem;
    }

    .hero__stat-label {
        font-size: 0.52rem;
    }

    .hero__stats {
        border-radius: 14px;
    }

    /* Metodología a 1 columna en pantallas muy pequeñas */
    .methodology__grid {
        grid-template-columns: 1fr;
        gap: 0.625rem;
    }

    /* Tarjetas de niveles: imagen más estrecha en pantallas muy pequeñas */
    .levels__card-header {
        width: 85px;
        min-width: 85px;
    }

    /* Valores a 1 columna */
    .values__grid {
        grid-template-columns: 1fr;
    }

    /* Sección comunidad */
    .community__future-item {
        font-size: 0.78rem;
    }

    /* Galería */
    .photo-gallery__grid {
        grid-template-columns: 1fr;
        grid-auto-rows: 175px;
    }

    .photo-gallery__item--wide {
        grid-column: auto;
    }

    /* Sede */
    .campus__feature {
        width: 100%;
        justify-content: center;
    }

    /* Botones */
    .btn--lg {
        font-size: 0.875rem;
        padding: 0.8rem 1.25rem;
    }

    /* Formulario de contacto */
    .contact__form-wrapper {
        padding: 1.125rem 0.875rem;
    }

    .nav__list {
        padding: 0.5rem 1.25rem;
    }

    .nav__mobile-actions {
        padding: 1rem 1.25rem calc(1rem + env(safe-area-inset-bottom, 0px));
    }

    /* Footer  */
    .footer__grid {
        gap: 1.25rem;
    }
}

/* ─── Pantallas grandes (1400px+) ─── */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }

    :root {
        --fs-5xl: 4rem;
    }
}

/* ─── Backdrop para menú móvil ─── */
.nav__backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.nav__backdrop.active {
    opacity: 1;
    visibility: visible;
}

/* ─── Animaciones CSS adicionales ─── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ─── Prefers Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ════════════════════════════════════════════════════════════════════
   HERO VIDEO BACKGROUND
   ════════════════════════════════════════════════════════════════════ */
.hero__video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

/* gallery 576px now handled in main mobile block */

/* ─── Print Styles ─── */
@media print {
    .header, .whatsapp-float, .scroll-top, .hero__particles, .hero__overlay, .hero__video {
        display: none !important;
    }

    .hero {
        min-height: auto;
        background: none;
    }

    .hero__content {
        color: var(--color-black);
    }

    .section {
        padding: var(--space-xl) 0;
    }
}