:root {
  --brand: #054543;
  --brand-deep: #032e2d;
  --sea: #2b9e8f;
  --sea-bright: #3fbfae;
  --sand: #c99545;
  --ink: #0f1a1c;
  --ink-soft: #4a5a5c;
  --paper: #f4f6f7;
  --card: #ffffff;
  --line: rgba(15, 26, 28, 0.08);
  --on-brand: #e8eeee;
  --on-brand-soft: rgba(232, 238, 238, 0.72);
  --radius: 22px;
  --max: 1120px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e6ecec;
    --ink-soft: #9fb0b1;
    --paper: #0b1220;
    --card: #141d2e;
    --line: rgba(255, 255, 255, 0.08);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
}
img { max-width: 100%; display: block; }
a { color: inherit; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; background: #fff; color: #000; padding: 8px 12px; border-radius: 8px; z-index: 10; }
:focus-visible { outline: 3px solid var(--sea-bright); outline-offset: 3px; border-radius: 6px; }

/* ---------- Header ---------- */
.site-header { position: absolute; inset: 0 0 auto 0; z-index: 5; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img.mark { height: 34px; width: auto; }
.brand img.word { height: 22px; width: auto; }
.nav { display: flex; gap: 24px; font-size: 15px; }
.nav a { color: var(--on-brand-soft); text-decoration: none; }
.nav a:hover { color: var(--on-brand); }
@media (max-width: 640px) { .nav { display: none; } }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--brand);
  color: var(--on-brand);
  padding: 140px 0 96px;
}
.hero::before {
  content: ""; position: absolute; inset: -20%;
  background:
    radial-gradient(40% 50% at 78% 30%, rgba(63, 191, 174, 0.28), transparent 70%),
    radial-gradient(45% 55% at 12% 90%, rgba(43, 158, 143, 0.18), transparent 70%),
    radial-gradient(60% 40% at 50% 0%, rgba(0, 0, 0, 0.25), transparent 70%);
  animation: drift 60s ease-in-out infinite alternate;
}
@keyframes drift { to { transform: translate3d(-4%, 3%, 0) scale(1.06); } }
@media (prefers-reduced-motion: reduce) { .hero::before { animation: none; } }
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; gap: 48px; } .hero { padding-top: 120px; } }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; letter-spacing: 0.02em; color: var(--on-brand-soft); background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.12); padding: 6px 12px; border-radius: 999px; }
h1 { font-size: clamp(40px, 6vw, 68px); line-height: 1.04; letter-spacing: -0.025em; margin: 20px 0 20px; font-weight: 750; }
.hero p.lede { font-size: clamp(18px, 2vw, 21px); color: var(--on-brand-soft); max-width: 34ch; margin: 0 0 32px; }

/* ---------- Signup ---------- */
.signup { display: flex; gap: 10px; flex-wrap: wrap; max-width: 480px; }
.signup input[type=email] {
  flex: 1 1 240px; min-height: 52px; padding: 0 18px; font: inherit; font-size: 16px;
  border-radius: 14px; border: 1px solid rgba(255,255,255,0.2); background: rgba(255,255,255,0.08); color: var(--on-brand);
}
.signup input::placeholder { color: rgba(232,238,238,0.55); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 52px; padding: 0 22px; border-radius: 14px; border: 0; cursor: pointer;
  font: inherit; font-size: 16px; font-weight: 650; text-decoration: none;
  background: var(--on-brand); color: var(--brand);
  transition: transform .15s ease, background .15s ease;
}
.btn:hover { background: #fff; }
.btn:active { transform: scale(0.98); }
.fineprint { font-size: 13px; color: var(--on-brand-soft); margin-top: 12px; }
.hidden { position: absolute; left: -9999px; }

/* ---------- Phone mock ---------- */
.phone {
  justify-self: center; width: min(340px, 82vw); aspect-ratio: 9 / 19.5;
  border-radius: 52px; padding: 12px;
  background: linear-gradient(160deg, #1a2b2d, #0a1415);
  box-shadow: 0 40px 80px rgba(0,0,0,0.35), inset 0 0 0 1px rgba(255,255,255,0.08);
}
.screen {
  height: 100%; border-radius: 42px; overflow: hidden; position: relative;
  background: linear-gradient(180deg, #0a3a39 0%, #07302f 40%, #0b1220 100%);
  padding: 54px 20px 20px; display: flex; flex-direction: column; gap: 14px;
}
.screen .island { position: absolute; top: 12px; left: 50%; transform: translateX(-50%); width: 34%; height: 26px; background: #000; border-radius: 20px; }
.screen h3 { margin: 0; font-size: 22px; font-weight: 700; color: #fff; }
.ring-wrap { display: grid; place-items: center; margin: 4px 0 2px; }
.ring { position: relative; width: 66%; aspect-ratio: 1; border-radius: 50%; border: 6px solid rgba(255,255,255,0.18); overflow: hidden; box-shadow: inset 0 0 0 1.5px rgba(255,255,255,0.6); }
.liquid { position: absolute; left: -50%; width: 200%; height: 200%; top: 48%; background: var(--sea); border-radius: 42%; animation: tide 9s linear infinite; }
.liquid.back { background: rgba(63,191,174,0.45); top: 45%; animation-duration: 13s; border-radius: 45%; }
@keyframes tide { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .liquid { animation: none; border-radius: 0; } }
.ring .value { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; color: #fff; font-family: ui-rounded, "SF Pro Rounded", system-ui, sans-serif; z-index: 2; }
.ring .value b { font-size: 30px; line-height: 1; display: block; }
.ring .value span { font-size: 11px; opacity: 0.85; }
.screen .sub { text-align: center; font-size: 12px; color: rgba(255,255,255,0.75); margin-top: -4px; }
.pill { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.08); border-radius: 16px; padding: 10px 12px; font-size: 12px; color: rgba(255,255,255,0.9); display: flex; align-items: center; gap: 8px; }
.pill i { width: 22px; height: 22px; border-radius: 50%; background: rgba(63,191,174,0.25); display: grid; place-items: center; font-style: normal; font-size: 12px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.tile { background: rgba(255,255,255,0.1); border-radius: 14px; padding: 10px; font-size: 11px; color: #fff; }
.tile b { display: block; font-size: 12px; }
.tile small { opacity: 0.7; }
.urge { margin-top: auto; text-align: center; background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.2); border-radius: 999px; padding: 10px; font-size: 12px; font-weight: 600; color: #fff; backdrop-filter: blur(10px); }

/* ---------- Sections ---------- */
section { padding: 96px 0; }
.section-title { font-size: clamp(30px, 4vw, 44px); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 14px; font-weight: 720; }
.section-lede { font-size: 19px; color: var(--ink-soft); max-width: 60ch; margin: 0 0 48px; }

.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .principles { grid-template-columns: 1fr; } }
.principle { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.principle .num { font-family: ui-rounded, "SF Pro Rounded", system-ui, sans-serif; font-weight: 700; font-size: 15px; color: var(--sea); }
.principle h3 { margin: 10px 0 8px; font-size: 21px; letter-spacing: -0.01em; }
.principle p { margin: 0; color: var(--ink-soft); }

.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 760px) { .features { grid-template-columns: 1fr; } }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: grid; grid-template-columns: 48px 1fr; gap: 18px; }
.feature .ico { width: 48px; height: 48px; border-radius: 14px; background: rgba(43,158,143,0.12); color: var(--sea); display: grid; place-items: center; }
.feature .ico svg { width: 24px; height: 24px; }
.feature h3 { margin: 2px 0 6px; font-size: 19px; }
.feature p { margin: 0; color: var(--ink-soft); font-size: 16px; }

.band { background: var(--brand); color: var(--on-brand); }
.band .section-lede { color: var(--on-brand-soft); }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 760px) { .compare { grid-template-columns: 1fr; } }
.compare > div { border-radius: var(--radius); padding: 28px; }
.compare .them { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); }
.compare .us { background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.18); }
.compare h3 { margin: 0 0 14px; font-size: 18px; }
.compare ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.compare li { padding-left: 28px; position: relative; color: var(--on-brand-soft); }
.compare .us li { color: var(--on-brand); }
.compare li::before { content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 14px; border-radius: 50%; border: 2px solid rgba(255,255,255,0.35); }
.compare .us li::before { background: var(--sea-bright); border-color: var(--sea-bright); }

.privacy-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 900px) { .privacy-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .privacy-grid { grid-template-columns: 1fr; } }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.stat b { display: block; font-family: ui-rounded, "SF Pro Rounded", system-ui, sans-serif; font-size: 34px; letter-spacing: -0.02em; color: var(--sea); }
.stat span { color: var(--ink-soft); font-size: 15px; }

.safety { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; }
@media (max-width: 760px) { .safety { grid-template-columns: 1fr; } }
.safety h3 { margin: 0 0 8px; font-size: 21px; }
.safety p { margin: 0; color: var(--ink-soft); }
.safety a.tel { font-weight: 700; font-size: 20px; color: var(--sea); text-decoration: none; white-space: nowrap; }

.cta { text-align: center; }
.cta .signup { margin: 0 auto; justify-content: center; }
.cta .fineprint { text-align: center; }

/* ---------- Footer ---------- */
footer { padding: 40px 0 56px; border-top: 1px solid var(--line); font-size: 14px; color: var(--ink-soft); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; align-items: center; }
footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
footer a { text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ---------- Doc pages (privacy / support) ---------- */
.doc-hero { background: var(--brand); color: var(--on-brand); padding: 120px 0 56px; }
.doc-hero h1 { font-size: clamp(34px, 5vw, 52px); margin: 0; }
.doc-hero p { color: var(--on-brand-soft); margin: 10px 0 0; }
.doc { padding: 56px 0 80px; }
.doc .wrap { max-width: 760px; }
.doc h2 { font-size: 24px; margin: 40px 0 10px; letter-spacing: -0.01em; }
.doc p, .doc li { color: var(--ink-soft); }
.doc strong { color: var(--ink); }
.doc .card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; margin: 16px 0; }
.doc dl { display: grid; grid-template-columns: max-content 1fr; gap: 10px 24px; margin: 0; }
.doc dt { font-weight: 650; color: var(--ink); }
.doc dd { margin: 0; color: var(--ink-soft); }
@media (max-width: 560px) { .doc dl { grid-template-columns: 1fr; } .doc dd { margin-bottom: 8px; } }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }