:root{
  --ink:#10383c;
  --deep:#073d44;
  --ocean:#0a6269;
  --aqua:#1aa6a7;
  --mint:#dff5ef;
  --sand:#f4efe5;
  --white:#ffffff;
  --muted:#647b7b;
  --line:rgba(16,56,60,.12);
  --shadow:0 30px 70px rgba(5,69,74,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);
  background:#fbfdfb;
  line-height:1.65;
}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
.container{width:min(1160px,calc(100% - 40px));margin-inline:auto}
.site-header{
  position:sticky;top:0;z-index:30;
  background:rgba(251,253,251,.88);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between}
.brand img,.footer img{width:210px}
.nav{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:700}
.nav a:hover{color:var(--aqua)}
.nav-cta{padding:11px 16px;border-radius:999px;background:var(--deep);color:#fff}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:10px;padding:7px 11px;font-size:20px;color:var(--ink)}
.hero{
  position:relative;overflow:hidden;
  padding:90px 0 64px;
  background:
    radial-gradient(circle at 88% 5%,rgba(26,166,167,.20),transparent 33%),
    linear-gradient(180deg,#f8fcfa,#eef9f5);
}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:55px;align-items:center}
.eyebrow{font-size:12px;font-weight:900;letter-spacing:.18em;color:var(--aqua);margin:0 0 18px}
.eyebrow.light{color:#9cebe2}
h1{font-size:clamp(48px,7vw,88px);line-height:.98;letter-spacing:-.055em;margin:0 0 26px}
h1 span{color:var(--aqua)}
h2{font-size:clamp(34px,4.4vw,58px);line-height:1.06;letter-spacing:-.045em;margin:0 0 24px}
h3{font-size:21px;margin:8px 0 9px}
.lead{font-size:18px;color:var(--muted);max-width:700px}
.hero-actions{display:flex;gap:12px;margin:30px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 20px;border-radius:14px;font-weight:850;font-size:14px}
.btn.primary{background:var(--deep);color:#fff;box-shadow:0 15px 40px rgba(7,61,68,.20)}
.btn.ghost{border:1px solid var(--line);background:rgba(255,255,255,.72)}
.btn.white{background:#fff;color:var(--deep)}
.mini-facts{display:flex;gap:28px;margin-top:34px;flex-wrap:wrap}
.mini-facts div{display:flex;flex-direction:column}
.mini-facts strong{font-size:17px}.mini-facts span{font-size:12px;color:var(--muted)}
.hero-art{position:relative}.hero-art:before{content:"";position:absolute;inset:20% 12%;background:#79ded255;filter:blur(45px);z-index:-1}
.breadcrumb{display:flex;gap:10px;padding:20px 0;font-size:12px;color:var(--muted)}
.section{padding:100px 0}
.intro-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:80px}
.body-copy{font-size:18px;color:var(--muted)}
.ocean{background:var(--deep);color:white}
.section-title{max-width:780px}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:42px}
.card{padding:28px;border:1px solid rgba(255,255,255,.12);border-radius:22px;background:rgba(255,255,255,.055);min-height:260px}
.card p{color:#b8d6d7}.icon{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:14px;background:#ffffff10;color:#9cebe2;font-size:24px}
.feature-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.feature-art img{border-radius:30px;box-shadow:var(--shadow)}
.feature-copy p,.muted{color:var(--muted)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.tag-row span{font-size:12px;font-weight:800;padding:7px 11px;border-radius:999px;background:var(--mint);color:var(--deep)}
.pale{background:var(--sand)}
.conservation-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:start}
.rules{display:grid;gap:10px}
.rules div{display:flex;align-items:center;gap:20px;background:#fff;border:1px solid rgba(16,56,60,.09);padding:20px 22px;border-radius:16px}
.rules b{font-size:12px;color:var(--aqua)}.rules span{font-weight:750}
.species{background:#fbfdfb}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:40px}
.topic-grid article{padding:25px;border:1px solid var(--line);border-radius:18px;background:white}
.topic-grid p{color:var(--muted)}
.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px}
details{border-bottom:1px solid var(--line);padding:20px 0}
summary{cursor:pointer;font-weight:850;font-size:18px}
details p{color:var(--muted);margin-bottom:0}
.cta-section{padding:20px 0 100px}
.cta-box{background:linear-gradient(135deg,#0a6269,#0a8c8e);color:#fff;border-radius:30px;padding:46px;display:flex;align-items:center;justify-content:space-between;gap:30px;box-shadow:var(--shadow)}
.cta-box h2{margin:0;max-width:720px}
.footer{background:#082f34;color:#d9eeee;padding:60px 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:50px}
.footer p,.footer span{color:#99bdbe;font-size:13px}.footer strong{display:block;margin-bottom:14px;color:#fff}
.footer a{display:block;color:#b8d6d7;font-size:13px;margin:7px 0}
@media(max-width:900px){
  .menu-btn{display:block}
  .nav{display:none;position:absolute;top:78px;left:20px;right:20px;flex-direction:column;align-items:stretch;padding:20px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .hero-grid,.intro-grid,.feature-grid,.conservation-grid,.faq-grid{grid-template-columns:1fr}
  .hero-art{order:-1;max-width:620px;margin:auto}
  .cards,.topic-grid{grid-template-columns:repeat(2,1fr)}
  .cta-box{flex-direction:column;align-items:flex-start}
}
@media(max-width:560px){
  .container{width:min(100% - 28px,1160px)}
  .hero{padding-top:52px}
  .section{padding:72px 0}
  .cards,.topic-grid,.footer-grid{grid-template-columns:1fr}
  .hero-actions{flex-direction:column}.btn{width:100%}
  .intro-grid,.feature-grid,.conservation-grid,.faq-grid{gap:34px}
  .cta-box{padding:28px}
}