*{box-sizing:border-box}html{color-scheme:dark}
:root{
  --bg:#081019;
  --panel:#0e1a2a;
  --line:#1a2e4a;
  --ink:#e6eef6;
  --muted:#8aa0bb;
  --accent:#ffcc66;
  --accent2:#66e6ff;
  --danger:#ff6b6b;
}
body{
  margin:0;
  font-family:ui-sans-system,system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;
  background:radial-gradient(1200px 600px at 50% -10%, #122a4a 0%, var(--bg) 60%);
  color:var(--ink);
  min-height:100vh;
  display:flex;flex-direction:column;
}
.back-link{
  display:inline-block;
  margin:18px 24px 0;
  color:var(--muted);
  text-decoration:none;
  font-size:14px;
}
.back-link:hover{color:var(--ink)}
.site-head{padding:8px 24px 0; max-width:1100px; width:100%; margin:0 auto;}
.eyebrow{letter-spacing:.14em;text-transform:uppercase;font-size:12px;color:var(--accent);margin:0 0 6px}
h1{margin:0;font-size:42px;letter-spacing:-.02em;line-height:1}
.lede{color:var(--muted);max-width:62ch;line-height:1.5;margin:10px 0 0}
.wrap{
  display:grid;
  grid-template-columns:360px 1fr;
  gap:20px;
  padding:20px 24px 28px;
  max-width:1100px;
  width:100%;
  margin:0 auto;
  flex:1;
}
.panel{
  background:color-mix(in srgb, var(--panel) 88%, transparent);
  border:1px solid var(--line);
  border-radius:16px;
  padding:16px;
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.hud{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:10px;
  margin-bottom:12px;
}
.hud div{
  border:1px solid var(--line);
  border-radius:12px;
  padding:8px 10px;
}
.hud span{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);display:block}
.hud strong{font-size:18px}
.status{min-height:22px;color:var(--accent2);font-size:14px;margin:6px 0 10px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}
button{
  appearance:none;
  border:1px solid var(--line);
  background:#12223a;
  color:var(--ink);
  padding:10px 14px;
  border-radius:10px;
  font:600 14px/1 system-ui;
  cursor:pointer;
}
button:hover{border-color:#2a4a72}
button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button.primary{background:var(--accent);color:#1a1200;border-color:transparent}
button.ghost{background:transparent}
.controls-hint{font-size:13px;color:var(--muted);line-height:1.5}
.controls-hint kbd{
  display:inline-block;
  border:1px solid var(--line);
  border-bottom-width:2px;
  background:#0f1e33;
  padding:1px 6px;
  border-radius:6px;
  font-size:12px;
  color:var(--ink);
}
.dim{opacity:.85}
.legend{display:flex;gap:12px;align-items:center;font-size:12px;color:var(--muted);margin-top:14px;flex-wrap:wrap}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block;border:1px solid rgba(255,255,255,.2)}
.dot.harbor{background:#2ecc71}
.dot.rock{background:#5d6b82}
.dot.ship{background:var(--accent)}
.stage{padding:10px;display:grid;place-items:center}
.canvas-wrap{position:relative;width:100%;aspect-ratio:900/600;max-width:900px}
#sea{width:100%;height:100%;display:block;border-radius:12px;background:#07111e;border:1px solid var(--line)}
.beam-readout{
  position:absolute;right:10px;top:10px;
  background:rgba(8,16,25,.75);
  border:1px solid var(--line);
  color:var(--accent);
  font:12px ui-monospace,Menlo,monospace;
  padding:6px 8px;border-radius:8px;
  pointer-events:none;
}
.foot{
  display:flex;justify-content:space-between;gap:12px;
  padding:14px 24px 20px;
  color:var(--muted);
  font-size:13px;
  border-top:1px solid rgba(255,255,255,.06);
}
.foot a{color:var(--muted);text-decoration:none}
.foot a:hover{color:var(--ink)}
@media (max-width:880px){
  .wrap{grid-template-columns:1fr}
  h1{font-size:34px}
  .hud{grid-template-columns:repeat(2,1fr)}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto !important; animation:none !important; transition:none !important}
}