/* =============================================================================
   PromoEscala — Hoja de estilos principal (web pública)
   ========================================================================== */

/* --- 1. Tokens de diseño -------------------------------------------------- */
:root {
    --color-dark: #101d16;
    --color-forest: #1e3327;
    --color-forest-600: #2a4534;
    --color-olive: #5c6b45;
    --color-anthracite: #22262a;
    --color-gray-900: #1f2328;
    --color-gray-700: #47505a;
    --color-gray-500: #6b7280;
    --color-gray-300: #d8dbde;
    --color-gray-100: #f1efe9;
    --color-cream: #f8f6f1;
    --color-white: #ffffff;
    --color-accent: #b6924a;
    --color-accent-dark: #93752f;
    --color-success: #3f7a4e;
    --color-border: #e5e2da;

    --font-heading: 'Oswald', 'Segoe UI', sans-serif;
    --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;

    --container-width: 1200px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 2px 10px rgba(16, 29, 22, 0.06);
    --shadow-md: 0 10px 30px rgba(16, 29, 22, 0.10);
    --shadow-lg: 0 20px 50px rgba(16, 29, 22, 0.16);
    --transition: 200ms ease;
}

/* --- 2. Reset base --------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--color-gray-900);
    background: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

ul { list-style: none; margin: 0; padding: 0; }

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin: 0 0 0.5em;
    color: var(--color-anthracite);
    letter-spacing: 0.01em;
}

p { margin: 0 0 1em; }

button { font-family: inherit; cursor: pointer; }

.icon {
    width: 1.15em;
    height: 1.15em;
    display: inline-block;
    vertical-align: -0.2em;
    flex-shrink: 0;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--color-dark);
    color: var(--color-white);
    padding: 10px 18px;
    z-index: 1000;
    border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
summary:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

/* --- 3. Layout --------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin-inline: auto;
    padding-inline: 20px;
}

.section { padding-block: 72px; }
.section--sm { padding-block: 48px; }
.section--tight { padding-block: 56px; }

.section-header {
    max-width: 680px;
    margin-inline: auto;
    text-align: center;
    margin-bottom: 48px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-olive);
    margin-bottom: 12px;
}

.section-header h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); }
.section-header p { color: var(--color-gray-700); font-size: 1.05rem; }

.bg-cream { background: var(--color-cream); }
.bg-dark { background: var(--color-dark); color: var(--color-white); }
.bg-dark h2, .bg-dark h3, .bg-dark h4 { color: var(--color-white); }

/* --- 4. Botones ---------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.03em;
    padding: 13px 28px;
    border-radius: var(--radius-sm);
    border: 1.5px solid transparent;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
    white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }

.btn-accent { background: var(--color-accent); color: var(--color-dark); box-shadow: var(--shadow-sm); }
.btn-accent:hover { background: var(--color-accent-dark); box-shadow: var(--shadow-md); }

.btn-primary { background: var(--color-forest); color: var(--color-white); }
.btn-primary:hover { background: var(--color-forest-600); box-shadow: var(--shadow-md); }

.btn-outline-light { border-color: rgba(255,255,255,0.55); color: var(--color-white); }
.btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: var(--color-white); }

.btn-outline { border-color: var(--color-gray-300); color: var(--color-anthracite); }
.btn-outline:hover { border-color: var(--color-forest); color: var(--color-forest); }

.btn-lg { padding: 15px 32px; font-size: 1rem; }
.btn-sm { padding: 9px 18px; font-size: 0.85rem; }
.btn-block { width: 100%; }

/* --- 5. Cabecera / navegación ------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    /* Sin backdrop-filter a propósito: crearía un containing block nuevo para
       los descendientes position:fixed (el panel .main-nav en móvil), lo que
       rompe su posicionamiento respecto al viewport. */
    background: rgba(16, 29, 22, 0.96);
    transition: background var(--transition), box-shadow var(--transition);
}
.site-header.is-scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.18); }

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--color-white);
}
.brand-icon { width: 26px; height: 26px; color: var(--color-accent); }
.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.05;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}
.brand-text small {
    font-family: var(--font-body);
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-gray-300);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}
.main-nav ul { display: flex; align-items: center; gap: 28px; }
.main-nav a {
    color: rgba(255,255,255,0.82);
    font-size: 0.92rem;
    font-weight: 500;
    padding-block: 6px;
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
}
.main-nav a:hover, .main-nav a.active { color: var(--color-white); border-color: var(--color-accent); }
.nav-cta { flex-shrink: 0; }

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    padding: 0;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- 6. Hero -------------------------------------------------------------- */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 88vh;
    color: var(--color-white);
    overflow: hidden;
    background: linear-gradient(155deg, var(--color-dark) 0%, var(--color-forest) 55%, var(--color-olive) 140%);
}
.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        repeating-linear-gradient(115deg, rgba(255,255,255,0.035) 0px, rgba(255,255,255,0.035) 1px, transparent 1px, transparent 64px),
        radial-gradient(circle at 82% 12%, rgba(182,146,74,0.22), transparent 55%),
        radial-gradient(circle at 8% 92%, rgba(255,255,255,0.05), transparent 45%);
}
.hero-inner { position: relative; padding-block: 100px; }
.hero-content { max-width: 680px; }

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    color: var(--color-white);
    margin-bottom: 0.4em;
}
.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.85);
    max-width: 560px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-block: 32px 28px; }

.hero-highlights { display: flex; flex-wrap: wrap; gap: 20px 28px; }
.hero-highlights li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.92rem;
    color: rgba(255,255,255,0.9);
}
.hero-highlights .icon { color: var(--color-accent); }

.check-list { display: flex; flex-direction: column; gap: 16px; }
.check-list li { display: flex; align-items: flex-start; gap: 10px; font-size: 0.95rem; color: var(--color-gray-700); }
.check-list .icon { color: var(--color-forest); margin-top: 3px; }

/* --- 7. Grids y tarjetas genéricas ---------------------------------------- */
.grid { display: grid; gap: 28px; }
.grid-align-center { align-items: center; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
/* justify-items:center solo en las rejillas de tarjetas: si una columna queda
   más ancha que el max-width de la tarjeta (pocos elementos), la centra en
   vez de dejarla pegada a la izquierda con hueco muerto a la derecha. No se
   aplica a .grid-2 porque esa se usa también para bloques de texto normales
   (p. ej. la introducción de Nosotros), que sí deben ocupar todo el ancho. */
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); justify-items: center; }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); justify-items: center; }

.card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    /* Evita que una tarjeta se estire enorme cuando hay pocos elementos en el
       grid (p. ej. un solo curso o servicio): sin este límite, auto-fit con
       columnas 1fr reparte todo el ancho sobrante en esa única tarjeta. */
    width: 100%;
    max-width: 420px;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }

/* Feature cards ("¿Por qué elegirnos?") */
.feature-card {
    padding: 32px 26px;
    text-align: left;
}
.feature-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--color-forest);
    color: var(--color-accent);
    margin-bottom: 18px;
}
.feature-icon .icon { width: 24px; height: 24px; }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { color: var(--color-gray-700); font-size: 0.95rem; margin: 0; }

/* Course / service cards */
.course-card, .service-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.card-media {
    position: relative;
    aspect-ratio: 16 / 10;
    background: linear-gradient(140deg, var(--color-forest), var(--color-olive));
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
}
.card-media img { width: 100%; height: 100%; object-fit: contain; }
.card-media .icon { width: 40px; height: 40px; }
/* Con imagen real: fondo claro neutro (no el degradado, pensado para el
   icono de repuesto) y algo de aire, para que ninguna imagen quede nunca
   recortada sea cual sea su proporción original. */
.card-media.has-image { background: var(--color-cream); padding: 14px; }

.card-body { padding: 24px; display: flex; flex-direction: column; gap: 12px; flex-grow: 1; }
.card-body h3 { font-size: 1.15rem; margin-bottom: 0; }
.card-body .card-text { color: var(--color-gray-700); font-size: 0.94rem; flex-grow: 1; }
.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 6px;
}
.card-price { font-family: var(--font-heading); font-size: 1.15rem; font-weight: 600; color: var(--color-forest); }

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 5px 11px;
    border-radius: 999px;
}
.badge-available { background: rgba(63, 122, 78, 0.12); color: var(--color-success); }
.badge-coming-soon { background: rgba(182, 146, 74, 0.14); color: var(--color-accent-dark); }

/* --- 8. Cómo funciona (pasos) --------------------------------------------- */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
    counter-reset: step;
}
.step { text-align: center; padding: 8px; }
.step-number {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1.5px solid var(--color-accent);
    color: var(--color-forest);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
}
.step h3 { font-size: 1rem; margin-bottom: 6px; }
.step p { color: var(--color-gray-700); font-size: 0.88rem; margin: 0; }

/* --- 9. Estadísticas ------------------------------------------------------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 32px;
    text-align: center;
}
.stat-value {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 8px;
}
.stat-label {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.78);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* --- 10. Testimonios -------------------------------------------------------- */
.testimonial-card {
    padding: 30px 26px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.testimonial-quote-icon { color: var(--color-accent); opacity: 0.7; }
.testimonial-quote-icon .icon { width: 30px; height: 30px; }
.testimonial-text { font-size: 0.98rem; color: var(--color-gray-700); flex-grow: 1; }
.testimonial-stars { display: flex; gap: 3px; color: var(--color-accent); }
.testimonial-stars .icon { width: 16px; height: 16px; }
.testimonial-header { display: flex; align-items: center; gap: 12px; margin-top: 4px; padding-top: 14px; border-top: 1px solid var(--color-border); }
.testimonial-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--color-forest);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    flex-shrink: 0;
}
.testimonial-author { display: flex; flex-direction: column; }
.testimonial-author strong { font-family: var(--font-heading); font-size: 0.95rem; }
.testimonial-author span { font-size: 0.82rem; color: var(--color-gray-500); }

/* --- 11. CTA final ----------------------------------------------------------- */
.cta-band {
    position: relative;
    text-align: center;
    color: var(--color-white);
    background: linear-gradient(135deg, var(--color-forest), var(--color-dark));
    padding-block: 80px;
    overflow: hidden;
}
.cta-band::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(182,146,74,0.25), transparent 60%);
}
.cta-band .container { position: relative; }
.cta-band h2 { color: var(--color-white); font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
/* Antes tenía margin-inline: auto 1.5em, que en la sintaxis lógica de CSS
   fija el margen inicial a auto y el final a 1.5em (no centra el bloque,
   solo lo empuja): con max-width puesto, hacía falta auto en los dos lados
   para centrarlo de verdad. */
.cta-band p { color: rgba(255,255,255,0.82); max-width: 560px; margin: 0 auto 1.5em; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-top: 12px; }

.section-cta { text-align: center; margin-top: 40px; }

/* --- 11b. Cabecera de páginas interiores + breadcrumb ------------------------- */
.page-header {
    position: relative;
    color: var(--color-white);
    background: linear-gradient(150deg, var(--color-dark) 0%, var(--color-forest) 80%);
    padding-block: 56px 48px;
    overflow: hidden;
}
.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image: repeating-linear-gradient(115deg, rgba(255,255,255,0.03) 0px, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 64px);
}
.page-header .container { position: relative; }
.page-header h1 { color: var(--color-white); font-size: clamp(1.8rem, 3.4vw, 2.5rem); margin-bottom: 0.3em; }
.page-header p { color: rgba(255,255,255,0.82); max-width: 640px; margin: 0; }

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: rgba(255,255,255,0.6);
    margin-bottom: 16px;
}
.breadcrumb a { color: rgba(255,255,255,0.85); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { color: rgba(255,255,255,0.35); }
.breadcrumb .current { color: rgba(255,255,255,0.6); }

/* --- 11c. Detalle de servicio -------------------------------------------------- */
.service-detail {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 1fr);
    gap: 44px;
    align-items: start;
}
.service-detail-media {
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: linear-gradient(140deg, var(--color-forest), var(--color-olive));
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
}
.service-detail-media img { width: 100%; height: 100%; object-fit: contain; }
.service-detail-media .icon { width: 64px; height: 64px; }
.service-detail-media.has-image { background: var(--color-cream); padding: 20px; }
.service-detail-body { margin-top: 28px; }
.service-detail-body p { color: var(--color-gray-700); }
.service-sidebar {
    position: sticky;
    top: 96px;
    padding: 28px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}
.service-sidebar .card-price { font-size: 1.8rem; display: block; margin-block: 6px 18px; }
.service-sidebar .service-course-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.86rem;
    color: var(--color-forest);
    margin-top: 20px;
    border-top: 1px solid var(--color-border);
    padding-top: 16px;
}

@media (max-width: 860px) {
    .service-detail { grid-template-columns: 1fr; }
    .service-sidebar { position: static; }
}

/* --- 11d. Página de contacto ---------------------------------------------------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 44px;
    align-items: start;
}
.contact-card {
    padding: 32px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}
.contact-info-list { display: flex; flex-direction: column; gap: 22px; margin-top: 12px; }
.contact-info-item { display: flex; gap: 14px; align-items: flex-start; }
.contact-info-item .icon { width: 22px; height: 22px; color: var(--color-forest); flex-shrink: 0; margin-top: 2px; }
.contact-info-item strong { display: block; font-family: var(--font-heading); font-size: 0.95rem; margin-bottom: 2px; }
.contact-info-item span { color: var(--color-gray-700); font-size: 0.92rem; }

/* Honeypot: campo señuelo invisible para humanos, visible en el DOM para bots. */
.hp-field { position: absolute; left: -9999px; top: -9999px; width: 1px; height: 1px; opacity: 0; overflow: hidden; }

@media (max-width: 860px) {
    .contact-grid { grid-template-columns: 1fr; }
}

/* --- 11e. Campus Virtual: login / registro / panel del alumno ------------------- */
.auth-card {
    max-width: 480px;
    margin-inline: auto;
    padding: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}
.auth-card--wide { max-width: 620px; }
.auth-card--flush { margin: 0; }
.auth-switch { text-align: center; margin-top: 20px; font-size: 0.9rem; color: var(--color-gray-700); }
.auth-switch a { color: var(--color-forest); font-weight: 600; }
.auth-admin-link { text-align: center; margin-top: 14px; font-size: 0.82rem; color: var(--color-gray-500); }
.auth-admin-link a { color: var(--color-gray-500); text-decoration: underline; }

.dashboard-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 32px; }
.dashboard-header p { color: var(--color-gray-700); margin: 4px 0 0; }

.enrollment-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    padding: 22px 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}
.enrollment-card h3 { font-size: 1.05rem; margin-bottom: 4px; }
.enrollment-course { font-size: 0.85rem; color: var(--color-gray-500); margin-bottom: 8px; }
.enrollment-meta { font-size: 0.85rem; color: var(--color-gray-500); }
.enrollment-content-note {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--color-gray-500);
    margin-top: 6px;
}

/* --- 11f. Preguntas frecuentes (acordeón nativo, sin JS) ------------------------ */
.faq-list { max-width: 760px; margin-inline: auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-white);
    overflow: hidden;
}
.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-anthracite);
    cursor: pointer;
    list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1.5px solid var(--color-border);
    color: var(--color-forest);
    transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}
.faq-item summary .faq-icon .icon { width: 12px; height: 12px; }
.faq-item[open] summary .faq-icon { transform: rotate(45deg); background: var(--color-forest); color: var(--color-white); border-color: var(--color-forest); }
.faq-item .faq-answer { padding: 0 24px 22px; color: var(--color-gray-700); font-size: 0.95rem; }

/* --- 11g. Botón flotante de WhatsApp -------------------------------------------- */
.whatsapp-float {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 150;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: #25d366;
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition), box-shadow var(--transition);
}
.whatsapp-float:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 24px 50px rgba(0,0,0,0.28); }
.whatsapp-float .icon { width: 27px; height: 27px; }

/* --- 12. Empty state -------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    border: 1.5px dashed var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-gray-500);
}
.empty-state--flush { border: none; padding: 24px; }

/* --- 12b. Utilidades compartidas (panel de administración + Campus) --------- */
.mt-24 { margin-top: 24px; }
.mb-24 { margin-bottom: 24px; }
.admin-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* Enlace de texto suelto (fuera de nav/botones/pie, que ya tienen su propio
   color): sin esto hereda color y sin subrayado del reset global de <a> y no
   se distingue de texto normal. */
.text-link { color: var(--color-forest); font-weight: 600; }
.text-link:hover { text-decoration: underline; }

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-gray-300);
    background: var(--color-white);
    color: var(--color-gray-700);
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.btn-icon .icon { width: 16px; height: 16px; }
.btn-icon:hover { background: var(--color-cream); color: var(--color-forest); border-color: var(--color-forest); }
.btn-icon-danger:hover { background: #fdecec; color: #b13b3b; border-color: #b13b3b; }

.admin-table-wrap { overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.admin-table th, .admin-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--color-border); vertical-align: middle; white-space: nowrap; }
.admin-table th { font-family: var(--font-heading); font-size: 0.75rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--color-gray-500); }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table td.actions { display: flex; gap: 8px; justify-content: flex-end; }
.admin-table td.actions form { display: inline-flex; margin: 0; }

.admin-thumb {
    width: 48px;
    height: 36px;
    border-radius: 6px;
    overflow: hidden;
    background: linear-gradient(140deg, var(--color-forest), var(--color-olive));
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.6);
}
.admin-thumb img { width: 100%; height: 100%; object-fit: cover; }
.admin-thumb .icon { width: 16px; height: 16px; }

/* --- 13. Pie de página -------------------------------------------------------- */
.site-footer { background: var(--color-anthracite); color: rgba(255,255,255,0.72); }
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 40px;
    padding-block: 60px 40px;
}
.footer-brand .brand-text {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-white);
}
.footer-brand .brand-text small {
    display: block;
    font-family: var(--font-body);
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
}
.footer-brand p { margin-top: 14px; font-size: 0.9rem; max-width: 320px; }

.site-footer h4 {
    color: var(--color-white);
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 16px;
}
.site-footer ul li { margin-bottom: 10px; font-size: 0.9rem; }
.site-footer a:hover { color: var(--color-accent); }
.footer-contact li { display: flex; align-items: center; gap: 8px; }
.footer-contact .icon { color: var(--color-accent); width: 16px; height: 16px; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-block: 20px;
    font-size: 0.82rem;
    text-align: center;
    color: rgba(255,255,255,0.5);
}

/* --- 14. Animaciones de aparición (scroll reveal) ----------------------------- */
/* El estado oculto solo se aplica si JS ya ha marcado <html class="js">
   (ver includes/header.php). Sin JS, o mientras JS carga, el contenido
   permanece visible por defecto: nunca depende del todo de que un script
   se ejecute a tiempo. */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 600ms ease, transform 600ms ease; }
.js .reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 90ms; }
.reveal-delay-2 { transition-delay: 180ms; }
.reveal-delay-3 { transition-delay: 270ms; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .card:hover, .btn:hover { transform: none; }
}

/* --- 15. Utilidades de formulario base (usadas en Contacto y Admin) ----------- */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 6px; color: var(--color-anthracite); }
.form-control {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.95rem;
    background: var(--color-white);
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus {
    outline: none;
    border-color: var(--color-forest);
    box-shadow: 0 0 0 3px rgba(30, 51, 39, 0.12);
}
textarea.form-control { resize: vertical; min-height: 120px; }
.form-error { color: #b13b3b; font-size: 0.82rem; margin-top: 6px; }
.form-hint { color: var(--color-gray-500); font-size: 0.82rem; margin-top: 6px; }
.form-check { display: flex; align-items: flex-start; gap: 10px; font-size: 0.88rem; color: var(--color-gray-700); }
.form-check input { margin-top: 4px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
@media (max-width: 480px) {
    .form-row { grid-template-columns: 1fr; }
}

.alert { padding: 14px 18px; border-radius: var(--radius-sm); font-size: 0.92rem; margin-bottom: 24px; }
.alert-success { background: rgba(63, 122, 78, 0.1); color: var(--color-success); border: 1px solid rgba(63, 122, 78, 0.25); }
.alert-error { background: rgba(177, 59, 59, 0.08); color: #b13b3b; border: 1px solid rgba(177, 59, 59, 0.25); }

/* --- 16. Responsive --------------------------------------------------------- */
@media (max-width: 991px) {
    .nav-toggle { display: flex; }

    .main-nav {
        position: fixed;
        inset: 76px 0 0 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--color-dark);
        padding: 24px 24px 32px;
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
        overflow-y: auto;
    }
    .main-nav.is-open { opacity: 1; transform: translateY(0); visibility: visible; pointer-events: auto; }
    .main-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
    .main-nav ul li { border-bottom: 1px solid rgba(255,255,255,0.08); }
    .main-nav a { display: block; padding: 16px 4px; border-bottom: none; }
    .nav-cta { margin-top: 20px; align-self: flex-start; }

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

@media (max-width: 640px) {
    .section { padding-block: 52px; }
    .hero-inner { padding-block: 64px; }
    .hero-actions .btn { flex: 1 1 auto; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .cta-actions .btn { width: 100%; }
    .whatsapp-float { right: 16px; bottom: 16px; width: 52px; height: 52px; }
    .whatsapp-float .icon { width: 24px; height: 24px; }
}