:root {
  --deep: #04121f; --mid: #072a3d; --shallow: #0d4a5c;
  --fg: #e8f4f6; --muted: #9dbac2; --line: rgba(232, 244, 246, .14);
  --glass: rgba(255, 255, 255, .06); --accent: #ff8a5c; --accent-ink: #1a0a04; --sea: #5fd3c6;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { background: var(--deep); }
body {
  min-height: 100vh; color: var(--fg); background: radial-gradient(120% 80% at 50% 0%, var(--shallow) 0%, var(--mid) 38%, var(--deep) 100%) fixed;
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", sans-serif; -webkit-font-smoothing: antialiased;
}
a { color: var(--sea); text-underline-offset: 3px; }
a:hover { color: #8ff0e5; }
:focus-visible { outline: 2px solid var(--sea); outline-offset: 3px; border-radius: 4px; }
.wrap { width: min(1040px, 100% - 32px); margin: 0 auto; }

/* bubbles */
.bubbles { position: fixed; inset: 0; pointer-events: none; overflow: hidden; z-index: 0; }
.bubbles i { position: absolute; bottom: -40px; border-radius: 50%; border: 1px solid rgba(232, 244, 246, .28); background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, .35), rgba(255, 255, 255, .03) 60%); animation: rise linear infinite; }
@keyframes rise { to { transform: translate3d(var(--drift, 20px), -115vh, 0); } }
@media (prefers-reduced-motion: reduce) { .bubbles { display: none; } }
main, header, footer { position: relative; z-index: 1; }

/* nav */
.nav { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-weight: 700; letter-spacing: -.01em; }
.logo img { width: 30px; height: 30px; }
.nav nav { display: flex; gap: 20px; font-size: 15px; }
.nav nav a { color: var(--muted); text-decoration: none; }
.nav nav a:hover { color: var(--fg); }

/* hero */
.hero { padding: clamp(40px, 9vh, 96px) 0 clamp(36px, 7vh, 72px); text-align: center; }
.badge { display: inline-block; padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--glass); color: var(--muted); font-size: 13px; letter-spacing: .02em; }
.hero h1 { margin: 18px auto 0; max-width: 16ch; font-size: clamp(40px, 7.5vw, 84px); line-height: 1.02; letter-spacing: -.035em; font-weight: 750; text-wrap: balance; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { margin: 20px auto 0; max-width: 58ch; color: var(--muted); font-size: clamp(17px, 2vw, 20px); text-wrap: pretty; }
.cta { margin-top: 30px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 12px; font-weight: 650; text-decoration: none; border: 1px solid var(--line); color: var(--fg); background: var(--glass); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: #ff9d76; color: var(--accent-ink); }
.btn:hover { color: var(--fg); background: rgba(255, 255, 255, .1); }

/* tank mockup */
.tank { margin: clamp(40px, 7vh, 64px) auto 0; max-width: 860px; aspect-ratio: 16 / 9; border-radius: 22px; position: relative; overflow: hidden;
  background: linear-gradient(180deg, rgba(95, 211, 198, .12), rgba(4, 18, 31, .6)), var(--mid);
  border: 1px solid var(--line); box-shadow: 0 40px 90px -40px rgba(0, 0, 0, .8), inset 0 1px 0 rgba(255, 255, 255, .12); text-align: left; }
.tank .glare { position: absolute; inset: 0; background: linear-gradient(115deg, rgba(255, 255, 255, .09) 0 22%, transparent 22% 100%); pointer-events: none; }
.tank .clock { position: absolute; right: 4%; top: 6%; font-size: clamp(22px, 4.4vw, 44px); font-weight: 700; letter-spacing: -.03em; }
.tank .msg { position: absolute; left: 4%; top: 7%; padding: 6px 14px; border-radius: 10px; background: var(--fg); color: var(--deep); font-weight: 650; font-size: clamp(11px, 1.6vw, 16px); }
.tank .center { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); text-align: center; width: 80%; }
.tank .center b { display: block; font-size: clamp(22px, 4.6vw, 48px); letter-spacing: -.03em; line-height: 1.1; }
.tank .center b em { font-style: normal; color: var(--accent); }
.tank .center span { display: inline-flex; gap: 8px; align-items: center; margin-top: 10px; padding: 5px 12px; border-radius: 999px; background: var(--glass); border: 1px solid var(--line); font-size: clamp(10px, 1.4vw, 14px); color: var(--muted); }
.tank .center span::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.tank .cards { position: absolute; left: 4%; top: 32%; display: grid; gap: 8px; width: 24%; }
.tank .cards div { padding: 8px 10px; border-radius: 10px; background: var(--glass); border: 1px solid var(--line); font-size: clamp(9px, 1.15vw, 12px); color: var(--muted); line-height: 1.35; }
.tank .cards div b { display: block; color: var(--fg); }
.tank .crab { position: absolute; bottom: 6%; width: clamp(34px, 6vw, 60px); animation: walk 14s ease-in-out infinite alternate; }
@keyframes walk { from { left: 8%; } to { left: 82%; } }
.tank .sand { position: absolute; left: 0; right: 0; bottom: 0; height: 9%; background: linear-gradient(180deg, transparent, rgba(255, 214, 170, .14)); }
@media (prefers-reduced-motion: reduce) { .tank .crab { animation: none; left: 46%; } }
@media (max-width: 600px) { .tank .cards { display: none; } }

/* features */
.features { padding: clamp(48px, 9vh, 96px) 0; }
.features h2, .page h1 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -.025em; line-height: 1.15; }
.grid { margin-top: 28px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.card { padding: 22px; border-radius: 16px; background: var(--glass); border: 1px solid var(--line); }
.card h3 { font-size: 17px; margin-bottom: 6px; }
.card p { color: var(--muted); font-size: 15px; }
@media (max-width: 860px) { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } .nav nav a.hide-sm { display: none; } }

/* privacy page */
.page { padding: clamp(28px, 6vh, 56px) 0 64px; }
.doc { max-width: 720px; }
.doc .updated { margin-top: 8px; color: var(--muted); font-size: 14px; }
.doc .summary { margin-top: 26px; padding: 18px 20px; border-radius: 14px; background: var(--glass); border: 1px solid var(--line); }
.doc .summary ul { margin: 8px 0 0 20px; }
.doc h2 { margin-top: 38px; font-size: 21px; letter-spacing: -.01em; }
.doc p, .doc li { color: #c9dde2; }
.doc p { margin-top: 12px; }
.doc ul { margin: 12px 0 0 22px; display: grid; gap: 6px; }
.doc code { font: 14px ui-monospace, SFMono-Regular, Menlo, monospace; padding: 1px 6px; border-radius: 6px; background: rgba(255, 255, 255, .08); color: var(--fg); overflow-wrap: anywhere; }
.doc strong { color: var(--fg); }

footer { border-top: 1px solid var(--line); padding: 26px 0 40px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--muted); }