:root {
  --navy: #061d33;
  --navy-soft: #0c344c;
  --teal: #58f0ca;
  --cyan: #22b9ff;
  --ink: #11283b;
  --muted: #607487;
  --paper: #f6f9f9;
  --line: #dce7e8;
  --white: #fff;
}

* { 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: var(--paper); }
a { color: inherit; }
.site-header { height: 76px; padding: 0 clamp(22px, 5vw, 78px); display: flex; align-items: center; gap: 42px; background: var(--navy); color: var(--white); position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(255,255,255,.12); }
.brand { text-decoration: none; font-weight: 800; letter-spacing: .2em; font-size: 20px; }
.brand span { color: var(--teal); }
nav { display: flex; gap: 28px; margin-left: auto; }
nav a { text-decoration: none; color: #c7d8e2; font-size: 14px; }
nav a:hover, .footer-links a:hover { color: var(--teal); }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 24px; border-radius: 999px; background: linear-gradient(110deg, var(--cyan), var(--teal)); color: var(--navy); text-decoration: none; font-weight: 800; box-shadow: 0 12px 30px rgba(23, 176, 200, .18); }
.button:hover { transform: translateY(-1px); }
.button-small { min-height: 40px; padding: 0 18px; font-size: 14px; }
.hero { min-height: 690px; display: grid; grid-template-columns: 1.04fr .96fr; align-items: center; padding: clamp(70px, 9vw, 128px) clamp(24px, 7vw, 112px); gap: 44px; background: radial-gradient(circle at 85% 15%, #135574 0, #0b344c 26%, var(--navy) 62%); color: var(--white); overflow: hidden; }
.hero-copy { max-width: 720px; }
.eyebrow { margin: 0 0 20px; color: var(--teal); font-size: 12px; line-height: 1.4; font-weight: 800; letter-spacing: .23em; }
.eyebrow.dark { color: #08745f; }
h1 { margin: 0; font-size: clamp(44px, 5.7vw, 82px); line-height: .98; letter-spacing: -.05em; }
h1 span { color: #afc5d3; }
.hero-lede { max-width: 680px; margin: 30px 0 0; color: #d0dfe7; font-size: clamp(18px, 1.8vw, 23px); line-height: 1.55; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 36px; }
.text-link { text-decoration: none; color: var(--white); font-weight: 700; }
.microcopy { color: #9fb8c8; margin-top: 20px; font-size: 13px; }
.hero-art { position: relative; }
.hero-art::before { content: ""; position: absolute; inset: 8% -12%; border-radius: 50%; background: radial-gradient(circle, rgba(88,240,202,.18), transparent 62%); filter: blur(15px); }
.hero-art img { display: block; position: relative; width: 100%; max-width: 680px; border-radius: 34px; box-shadow: 0 30px 80px rgba(0,0,0,.24); }
.trust-strip { display: grid; grid-template-columns: repeat(3, 1fr); padding: 26px clamp(24px, 7vw, 112px); background: var(--white); border-bottom: 1px solid var(--line); }
.trust-strip div { padding: 8px 28px; border-left: 1px solid var(--line); }
.trust-strip div:first-child { border-left: 0; }
.trust-strip strong, .trust-strip span { display: block; }
.trust-strip strong { margin-bottom: 6px; }
.trust-strip span { color: var(--muted); font-size: 14px; line-height: 1.45; }
.section { padding: clamp(74px, 9vw, 128px) clamp(24px, 7vw, 112px); }
.intro { background: var(--paper); }
h2 { max-width: 900px; margin: 0; font-size: clamp(38px, 4.2vw, 64px); line-height: 1.05; letter-spacing: -.04em; }
.section-lede { max-width: 820px; color: var(--muted); font-size: 20px; line-height: 1.6; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 58px; background: var(--line); border: 1px solid var(--line); }
.feature-grid article { min-height: 250px; padding: 36px; background: var(--white); }
.number { color: #0b846d; font-size: 13px; font-weight: 800; letter-spacing: .16em; }
h3 { font-size: 22px; margin: 38px 0 12px; }
.feature-grid p, .safety-list p { color: var(--muted); line-height: 1.65; }
.conversation { display: grid; grid-template-columns: .86fr 1.14fr; gap: clamp(40px, 8vw, 120px); align-items: center; background: var(--navy); color: var(--white); }
.conversation > div:first-child p:not(.eyebrow) { color: #b9ced9; font-size: 19px; line-height: 1.6; }
.chat-card { padding: clamp(24px, 4vw, 48px); border: 1px solid rgba(255,255,255,.14); border-radius: 28px; background: rgba(255,255,255,.07); box-shadow: 0 28px 80px rgba(0,0,0,.2); }
.chat-label { margin: 20px 0 8px; color: var(--teal); font-size: 11px; font-weight: 800; letter-spacing: .16em; }
.bubble { padding: 18px 20px; border-radius: 18px; line-height: 1.55; }
.bubble.user { margin-left: 12%; background: #164460; }
.bubble.assistant { margin-right: 6%; color: var(--ink); background: var(--white); }
.source { margin-top: 10px; color: var(--teal); font-size: 13px; }
.safety { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(45px, 8vw, 130px); background: #edf6f5; }
.safety-list { border-top: 1px solid #c9dcda; }
.safety-list article { display: grid; grid-template-columns: .65fr 1fr; gap: 24px; padding: 26px 0; border-bottom: 1px solid #c9dcda; }
.safety-list h3 { margin: 0; font-size: 18px; }
.safety-list p { margin: 0; }
.beta { display: flex; justify-content: space-between; align-items: center; gap: 42px; background: linear-gradient(115deg, #0a3a4f, #08745f); color: var(--white); }
.beta p:not(.eyebrow) { max-width: 800px; color: #d4ece8; font-size: 18px; line-height: 1.6; }
.button-light { flex: 0 0 auto; background: var(--white); color: var(--navy); }
footer { padding: 46px clamp(24px, 7vw, 112px); display: grid; grid-template-columns: 1fr auto; gap: 18px; background: #031421; color: #d4e1e8; }
footer strong { letter-spacing: .22em; color: var(--white); }
footer p { margin: 7px 0 0; color: #89a2b1; font-size: 13px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { text-decoration: none; font-size: 14px; }
.copyright { grid-column: 1 / -1; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); }
.legal { max-width: 900px; margin: 0 auto; padding: 70px 24px 110px; }
.legal h1 { color: var(--navy); font-size: clamp(42px, 6vw, 68px); }
.legal h2 { margin-top: 42px; font-size: 28px; }
.legal p, .legal li { color: #40566a; line-height: 1.72; }
.legal .back { display: inline-block; margin-bottom: 36px; color: #08745f; font-weight: 700; text-decoration: none; }

@media (max-width: 850px) {
  .site-header { height: 68px; gap: 18px; padding: 0 18px; }
  nav { display: none; }
  .site-header .button { margin-left: auto; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 64px; }
  .hero-art { order: -1; max-width: 420px; }
  .trust-strip, .feature-grid, .conversation, .safety { grid-template-columns: 1fr; }
  .trust-strip div { border-left: 0; border-top: 1px solid var(--line); padding: 18px 0; }
  .trust-strip div:first-child { border-top: 0; }
  .safety-list article { grid-template-columns: 1fr; gap: 6px; }
  .beta { align-items: flex-start; flex-direction: column; }
  footer { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }