/* Imagen corporativa Vertiports Network®: Cielo Abierto #66D3C8, Destello Blanco #FFFFFF, Negro nebulosa #00001E.
   Cualquier otro tono es una transparencia de estos tres. Clash Display (títulos) y DM Sans (texto). */

@font-face { font-family: 'Clash Display'; src: url('../fonts/ClashDisplay-Regular.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Clash Display'; src: url('../fonts/ClashDisplay-Bold.woff2') format('woff2'); font-weight: 700; font-style: normal; font-display: swap; }

:root { --sky: #66D3C8; --white: #FFFFFF; --ink: #00001E; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
    margin: 0; background: var(--ink); color: var(--white);
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif; line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { font-family: 'Clash Display', sans-serif; font-weight: 700; margin: 0; line-height: 1.15; }
p { margin: 0; }
a { color: var(--sky); text-decoration: none; }
a:hover { text-decoration: underline; }
strong { color: var(--sky); font-weight: 700; }
img { max-width: 100%; height: auto; display: block; }
::selection { background: rgba(102, 211, 200, .3); }

.wrap { max-width: 72rem; margin: 0 auto; padding: 0 1rem; }

/* Cabecera */
.site-header { position: sticky; top: 0; z-index: 30; border-bottom: 1px solid rgba(255, 255, 255, .1); background: rgba(0, 0, 30, .95); backdrop-filter: blur(8px); }
.site-header .wrap { height: 72px; display: flex; align-items: center; justify-content: space-between; }
.site-header img { height: 40px; width: auto; }

/* Botones y etiquetas */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 26px; border-radius: 999px; font-weight: 700; font-size: 14px; letter-spacing: .04em; text-transform: uppercase; white-space: nowrap; transition: background .2s, border-color .2s, color .2s; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--sky); color: var(--ink); }
.btn-primary:hover { background: rgba(102, 211, 200, .85); }
.btn-outline { border: 1px solid rgba(255, 255, 255, .25); color: var(--white); }
.btn-outline:hover { border-color: var(--sky); color: var(--sky); }
.btn-sm { padding: 8px 20px; font-size: 13px; }
.pill { display: inline-block; margin-bottom: 20px; padding: 4px 12px; border-radius: 999px; border: 1px solid rgba(102, 211, 200, .3); background: rgba(102, 211, 200, .1); color: var(--sky); font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }

/* Hero */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid rgba(255, 255, 255, .1); }
.hero::before { content: ""; position: absolute; top: -160px; right: 0; width: 560px; height: 560px; border-radius: 50%; background: rgba(102, 211, 200, .1); filter: blur(140px); pointer-events: none; }
.hero .wrap { position: relative; padding-top: 112px; padding-bottom: 112px; }
.hero-text { max-width: 48rem; }
.hero h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
.hero .lead { margin-top: 24px; font-size: clamp(1.25rem, 2.2vw, 1.5rem); line-height: 1.35; color: rgba(255, 255, 255, .85); }
.hero .desc { margin-top: 20px; font-size: 1.125rem; color: rgba(255, 255, 255, .6); }
.hero-cta { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 12px; }

/* Secciones */
.section { padding: 80px 0; }
.section-alt { background: rgba(255, 255, 255, .03); border-top: 1px solid rgba(255, 255, 255, .1); border-bottom: 1px solid rgba(255, 255, 255, .1); }
.section-head { max-width: 48rem; margin-bottom: 48px; }
.section-head h2, .split-text h2 { font-size: clamp(1.875rem, 3.5vw, 2.5rem); }
.section-head .intro { margin-top: 20px; font-size: 1.125rem; color: rgba(255, 255, 255, .7); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split.reverse .split-media { order: -1; }
.split-text p { margin-top: 18px; color: rgba(255, 255, 255, .7); font-size: 1.0625rem; }
.split-text h2 + p { margin-top: 20px; }
.split-text .subtitle { margin-top: 14px; font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: rgba(255, 255, 255, .85); }
.split-media img { width: 100%; border-radius: 16px; border: 1px solid rgba(255, 255, 255, .1); }
.split-media img.circle { border-radius: 50%; border: 0; }

.statement { border-top: 1px solid rgba(255, 255, 255, .1); border-bottom: 1px solid rgba(255, 255, 255, .1); background: rgba(255, 255, 255, .04); padding: 28px 0; text-align: center; }
.statement p { font-family: 'Clash Display', sans-serif; font-weight: 700; font-size: clamp(1.5rem, 3vw, 2.25rem); }
.statement span { color: var(--sky); }

/* Tarjetas numeradas */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 36px; }
.card { border: 1px solid rgba(255, 255, 255, .1); background: rgba(255, 255, 255, .04); border-radius: 14px; padding: 28px; transition: border-color .2s; }
.card:hover { border-color: rgba(102, 211, 200, .5); }
.card .num { display: block; margin-bottom: 16px; font-family: 'Clash Display', sans-serif; font-weight: 700; font-size: 14px; letter-spacing: .12em; color: var(--sky); }
.card p { color: rgba(255, 255, 255, .7); }

/* Ciudades */
.red-card { display: flex; margin: 0 0 24px; border: 1px solid rgba(255, 255, 255, .1); background: rgba(255, 255, 255, .04); border-radius: 18px; overflow: hidden; color: var(--white); transition: border-color .2s; }
.red-card:hover { border-color: rgba(102, 211, 200, .6); text-decoration: none; }
.red-card img { width: 42%; object-fit: cover; flex-shrink: 0; border-radius: 0; }
.red-card-body { padding: 36px; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }
.red-card-body h3 { font-size: 1.75rem; margin-bottom: 12px; }
.red-card-body p { color: rgba(255, 255, 255, .7); margin-bottom: 24px; }
.city-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.city-card { position: relative; display: flex; flex-direction: column; justify-content: flex-end; min-height: 116px; padding: 38px 18px 18px; border: 1px solid rgba(255, 255, 255, .1); background: rgba(255, 255, 255, .04); border-radius: 14px; color: var(--white); transition: border-color .2s, background .2s; }
.city-card:hover { border-color: rgba(102, 211, 200, .6); background: rgba(102, 211, 200, .08); text-decoration: none; }
.city-eyebrow { font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: rgba(255, 255, 255, .55); white-space: nowrap; }
.city-name { font-family: 'Clash Display', sans-serif; font-weight: 700; font-size: 1.375rem; line-height: 1.15; margin-top: 4px; }
.city-card::after { content: "↗"; position: absolute; top: 14px; right: 16px; color: var(--sky); font-size: 18px; transition: transform .2s; }
.city-card:hover::after { transform: translate(2px, -2px); }

/* Preguntas frecuentes */
.faq { max-width: 48rem; }
.faq details { border-bottom: 1px solid rgba(255, 255, 255, .1); }
.faq details:first-child { border-top: 1px solid rgba(255, 255, 255, .1); }
.faq summary { cursor: pointer; list-style: none; position: relative; padding: 20px 40px 20px 0; font-family: 'Clash Display', sans-serif; font-weight: 700; font-size: 1.125rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 14px; font-size: 26px; color: var(--sky); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 20px; color: rgba(255, 255, 255, .7); }

/* Contacto */
.contact-frame { max-width: 56rem; overflow: hidden; padding: 16px; border: 1px solid rgba(255, 255, 255, .1); background: rgba(255, 255, 255, .04); border-radius: 14px; }
.contact-frame iframe { display: block; width: 100%; border: 0; outline: 0; }

/* Pie */
.site-footer { border-top: 1px solid rgba(255, 255, 255, .1); background: var(--ink); }
.site-footer .wrap { padding-top: 48px; padding-bottom: 32px; }
.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-bottom: 32px; }
.site-footer h3 { font-size: 14px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 16px; }
.site-footer p, .site-footer li, .site-footer a { font-size: 14px; color: rgba(255, 255, 255, .75); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a:hover { color: var(--sky); text-decoration: none; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding-top: 28px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
.footer-bottom p { color: rgba(255, 255, 255, .6); }

/* Subir */
.fly-to-top { position: fixed; bottom: 20px; right: 20px; width: 48px; height: 48px; border-radius: 50%; background: var(--sky); color: var(--ink); display: flex; align-items: center; justify-content: center; font-size: 22px; font-weight: 700; z-index: 20; opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; }
.fly-to-top.show { opacity: 1; visibility: visible; }
.fly-to-top:hover { text-decoration: none; background: rgba(102, 211, 200, .85); }

/* Páginas auxiliares */
.notice { padding: 120px 0; text-align: left; }
.notice h1 { font-size: clamp(1.875rem, 4vw, 3rem); margin-bottom: 28px; }

@media (min-width: 768px) { .contact-frame { padding: 24px; } }

@media (max-width: 900px) {
    .split { grid-template-columns: 1fr; gap: 32px; }
    .split.reverse .split-media { order: 0; }
    .cards { grid-template-columns: 1fr; }
    .city-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; }
    .red-card { flex-direction: column; }
    .red-card img { width: 100%; height: 220px; }
    .red-card-body { padding: 24px; }
}
@media (max-width: 600px) {
    .section { padding: 56px 0; }
    .hero .wrap { padding-top: 72px; padding-bottom: 72px; }
    .btn { white-space: normal; text-align: center; }
}