:root{--brand-navy:#002266;--brand-cyan:#22BBDD;--brand-sky:#B3E9F7;--text:#0F1B3D;--bg:#fff}
*{box-sizing:border-box}html,body{margin:0;padding:0}
body{font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg)}
h1,h2,h3{font-family:'Poppins','Inter',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;letter-spacing:.2px}
.container{max-width:1120px;margin:0 auto;padding:0 16px}
/* Header */
.site-header{position:sticky;top:0;background:var(--bg);border-bottom:1px solid #e8edf6;z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);font-weight:700}
.brand-text{display:none}.menu-btn{display:none;font-size:22px;background:transparent;border:0;cursor:pointer}
.nav a{margin:0 10px;padding:8px 10px;text-decoration:none;color:var(--text)}.nav .btn{margin-left:8px}
/* Buttons */
.btn{display:inline-block;padding:10px 16px;border-radius:10px;border:1px solid var(--brand-navy);background:#fff;color:var(--brand-navy);font-weight:600;text-decoration:none}
.btn:hover{opacity:.9}.btn-primary{background:var(--brand-navy);color:#fff}.btn-secondary{background:var(--brand-cyan);border-color:var(--brand-cyan);color:#00334a}.btn-ghost{background:transparent;border-color:transparent;color:var(--brand-navy)}
/* Hero */
.hero{background:linear-gradient(180deg,rgba(34,187,221,.10),rgba(0,34,102,.06));position:relative}
.hero-inner{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:center;padding:64px 16px}
.hero h1{font-size:40px;line-height:1.1;margin:0 0 10px}.hero p{font-size:18px;margin:0 0 20px;color:#32415f}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}.hero-art img{width:100%;height:auto}
.hero-wave{position:absolute;left:0;right:0;bottom:-1px;height:12px;background:linear-gradient(90deg,var(--brand-navy),var(--brand-cyan));opacity:.6}
/* Sections */
.section{padding:56px 0}.section.alt{background:#f7fafc}.section h2{font-size:28px;margin:0 0 8px;color:var(--brand-navy)}.muted{color:#5a6a8a}
/* Cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:18px}
.card{border:1px solid #e6edf5;border-radius:14px;padding:18px;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.card h3{margin:0 0 6px;font-size:18px;color:var(--brand-navy)}.card .link{color:var(--brand-cyan);text-decoration:none;font-weight:600}
/* Lists */
.list{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
.list-item{padding:12px 14px;border-radius:12px;background:#fff;border:1px dashed #d7e3f7;color:#243352;text-decoration:none}
/* Videos */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:12px}
.video-thumb{display:flex;flex-direction:column;gap:8px}.video-thumb .thumb{width:100%;aspect-ratio:16/9;border-radius:12px;background:linear-gradient(135deg,var(--brand-cyan),var(--brand-sky))}
/* Gallery */
.gallery{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-top:12px}.gallery .ph{aspect-ratio:1/1;border-radius:10px;background:linear-gradient(135deg,#fff,var(--brand-sky));border:1px solid #e4eefb}
/* Form */
.form{display:grid;gap:12px;max-width:520px}.form input,.form textarea{padding:12px 14px;border:1px solid #d6e0f0;border-radius:10px}.form textarea{min-height:120px;resize:vertical}
/* Footer */
.site-footer{border-top:1px solid #e8edf6;background:var(--brand-navy);color:#e9f1ff}
.site-footer .container{display:flex;align-items:center;gap:14px;justify-content:space-between;padding:18px 16px}
.site-footer img{filter:brightness(0) invert(1)}.foot-nav a{color:#e9f1ff;text-decoration:none;margin-left:12px;opacity:.9}
/* Responsive */
@media (max-width:900px){.hero-inner{grid-template-columns:1fr}.cards,.video-grid{grid-template-columns:1fr 1fr}.gallery{grid-template-columns:repeat(3,1fr)}}
@media (max-width:720px){.menu-btn{display:block}.nav{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg);border-bottom:1px solid #e8edf6;padding:12px 16px}
.nav.open{display:flex;flex-wrap:wrap;gap:8px}.cards,.video-grid{grid-template-columns:1fr}.gallery{grid-template-columns:repeat(2,1fr)}}
html{scroll-behavior:smooth}
:target{scroll-margin-top:80px}              /* anclas con header sticky */
a:focus-visible,.btn:focus-visible{outline:3px solid var(--brand-cyan);outline-offset:2px}
.btn,.nav a{transition:transform .06s ease,box-shadow .2s ease,background .2s ease,color .2s ease}
.btn:hover{transform:translateY(-1px)}
.site-header.scrolled{box-shadow:0 6px 16px rgba(0,0,0,.08)}