:root{
  --bg:#07131f; --panel:#0d2233; --panel2:#102c41; --text:#f3f8fb;
  --muted:#9fb7c8; --aqua:#39d7df; --blue:#4b8dff; --gold:#ffbe55;
  --line:rgba(255,255,255,.12); --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#f4f8fb;color:#10202d;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{text-decoration:none;color:inherit}
.site-header{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:14px max(20px,calc((100vw - var(--max))/2));background:rgba(7,19,31,.93);backdrop-filter:blur(14px);color:white;border-bottom:1px solid var(--line)}
.brand{display:flex;gap:10px;align-items:center}
.brand-mark{font-size:30px}
.brand strong,.brand small{display:block}
.brand small{font-size:11px;letter-spacing:.08em;color:var(--aqua);text-transform:uppercase}
nav{display:flex;gap:24px;font-size:14px}
nav a:hover{color:var(--aqua)}
.hero{min-height:760px;position:relative;display:grid;place-items:center;padding:90px 20px 60px;color:white;background:
linear-gradient(180deg,rgba(4,15,24,.25),rgba(4,15,24,.92)),
url("assets/hero.png") center/cover no-repeat,
radial-gradient(circle at 70% 15%,#df8649,transparent 30%),
linear-gradient(135deg,#0d3655,#07131f)}
.hero-overlay{position:absolute;inset:0;background-image:linear-gradient(rgba(57,215,223,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(57,215,223,.05) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(to bottom,black,transparent)}
.hero-content{position:relative;width:min(var(--max),100%);padding-right:420px}
.eyebrow{color:var(--aqua);letter-spacing:.18em;font-weight:800;font-size:12px}
h1{font-size:clamp(48px,7vw,88px);line-height:.94;margin:14px 0 24px;letter-spacing:-.055em}
.hero-copy{font-size:20px;line-height:1.6;max-width:720px;color:#d4e3ec}
.hero-actions,.chip-row,.control-row{display:flex;gap:12px;flex-wrap:wrap}
.button{border:0;border-radius:9px;padding:14px 20px;font-weight:800;cursor:pointer;display:inline-block}
.primary{background:linear-gradient(135deg,var(--aqua),var(--blue));color:#04121c}
.ghost{border:1px solid rgba(255,255,255,.3);color:white;background:rgba(255,255,255,.06)}
.live-card{position:absolute;right:max(20px,calc((100vw - var(--max))/2));top:170px;width:360px;background:rgba(7,25,39,.82);border:1px solid rgba(57,215,223,.35);box-shadow:0 30px 80px rgba(0,0,0,.35);backdrop-filter:blur(18px);border-radius:16px;padding:20px}
.live-heading{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}
.live-heading i{display:inline-block;width:8px;height:8px;border-radius:50%;background:#48ef89;box-shadow:0 0 12px #48ef89}
.metrics{display:grid;gap:12px;margin-top:18px}
.metrics article,.stat-grid article{padding:18px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.045)}
.metrics small,.metrics span,.stat-grid small,.stat-grid span{display:block;color:var(--muted)}
.metrics strong,.stat-grid strong{display:block;font-size:31px;margin:4px 0}
.section{padding:92px 20px}
.section>*{max-width:var(--max);margin-left:auto;margin-right:auto}
.section-heading{margin-bottom:34px}
.section-heading h2,.split h2,.closing h2{font-size:clamp(34px,5vw,58px);line-height:1.05;letter-spacing:-.04em;margin:10px 0}
.section-heading p,.split p,.closing p{font-size:18px;line-height:1.7;color:#536c7d}
.pillar-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.pillar{background:white;border:1px solid #dfe9ef;border-radius:14px;padding:26px;box-shadow:0 14px 35px rgba(13,34,51,.06)}
.pillar span{color:var(--blue);font-weight:900}
.pillar h3{font-size:22px}
.pillar p{color:#607686;line-height:1.6}
.dark-section{background:var(--bg);color:white}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.split p{color:#b8cbd6}
.chip-row span{border:1px solid rgba(57,215,223,.25);background:rgba(57,215,223,.07);padding:9px 12px;border-radius:999px;color:#c8fbff;font-size:13px}
.engine-panel{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid rgba(57,215,223,.25);border-radius:16px;padding:22px}
.engine-title,.engine-line{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid var(--line)}
.engine-title b,.ok{color:#48ef89}.warn{color:var(--gold)}
.full{width:100%;margin-top:18px}
.small-note{font-size:12px!important;text-align:center}
.dashboard{display:grid;grid-template-columns:220px 1fr;min-height:560px;border-radius:16px;overflow:hidden;background:var(--bg);box-shadow:0 25px 70px rgba(7,19,31,.18)}
.dashboard-sidebar{display:flex;flex-direction:column;padding:18px;background:#0b1d2b;border-right:1px solid var(--line)}
.dashboard-sidebar button{border:0;background:transparent;color:#9fb7c8;padding:15px;text-align:left;border-radius:8px;cursor:pointer;font-weight:700}
.dashboard-sidebar button.active{background:rgba(57,215,223,.12);color:var(--aqua)}
.dashboard-main{padding:30px;color:white}
.dashboard-view{display:none}.dashboard-view.active{display:block}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:20px 0}
.map-placeholder{height:320px;border:1px solid rgba(57,215,223,.23);border-radius:14px;position:relative;overflow:hidden;background:radial-gradient(ellipse at 50% 60%,#184f68,#0d2638 68%)}
.map-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:32px 32px}
.channel-line{position:absolute;width:75%;height:54px;left:12%;top:48%;border:3px solid var(--aqua);border-color:var(--aqua) transparent transparent transparent;border-radius:50%;transform:rotate(-10deg);filter:drop-shadow(0 0 8px var(--aqua))}
.boat-marker{position:absolute;left:53%;top:46%;color:var(--gold);font-size:28px;transform:rotate(18deg)}
.map-label{position:absolute;bottom:18px;left:20px;display:grid}.map-label span{color:#b8cbd6;font-size:13px}
.formula,.route-output,.depth-result{background:rgba(57,215,223,.08);border:1px solid rgba(57,215,223,.2);border-radius:12px;padding:18px}
.depth-result{margin-top:20px;text-align:center}.depth-result strong{display:block;font-size:52px;margin:8px}
.control-row label{display:grid;gap:6px;color:#b8cbd6}
input{background:#091a27;border:1px solid rgba(255,255,255,.18);color:white;padding:12px;border-radius:8px;width:150px}
.route-output{margin-top:20px}
.community-list{display:grid;gap:12px}
.community-item{padding:18px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.04)}
.community-item small{color:var(--aqua)}
.closing{text-align:center;max-width:880px!important}
footer{padding:40px 20px;background:#04101a;color:white;text-align:center;display:grid;gap:8px}
footer span,footer small{color:#8fa7b8}
@media(max-width:900px){
  nav{display:none}.hero{min-height:880px;align-items:start}.hero-content{padding-right:0}.live-card{position:relative;top:auto;right:auto;width:min(100%,560px);margin-top:40px}
  .pillar-grid,.stat-grid{grid-template-columns:repeat(2,1fr)}.split{grid-template-columns:1fr}.dashboard{grid-template-columns:1fr}.dashboard-sidebar{flex-direction:row;overflow:auto}.dashboard-sidebar button{white-space:nowrap}
}
@media(max-width:560px){
  h1{font-size:48px}.hero{padding-top:70px}.pillar-grid,.stat-grid{grid-template-columns:1fr}.section{padding:70px 16px}.dashboard-main{padding:20px}.hero-actions .button{width:100%;text-align:center}
}