:root {
  --void: #06101d;
  --navy: #0a1729;
  --paper: #f6f1e8;
  --card: #fffaf4;
  --ink: #15202b;
  --muted: #5b6572;
  --line: #ddd4c6;
  --cyan: #22c8ff;
  --green: #1f7a4d;
  --amber: #c47b17;
  --red: #b42318;
  --radius: 24px;
  --shadow: 0 18px 50px rgba(6, 16, 29, 0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(34,200,255,.12), transparent 50%),
    var(--paper);
  font: 19px/1.55 "Segoe UI", system-ui, sans-serif;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
.wrap { width: min(1140px, calc(100% - 36px)); margin: 0 auto; }
.nav {
  position: sticky; top: 0; z-index: 30;
  background: rgba(246, 241, 232, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav-in {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 0;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 44px; height: 44px; border-radius: 13px; }
.brand strong { display: block; letter-spacing: 0.14em; font-size: 13px; }
.brand small { display: block; color: var(--muted); font-size: 13px; }
.nav-links { display: flex; flex-wrap: wrap; gap: 16px 18px; align-items: center; font-size: 15px; }
.nav-links a { text-decoration: none; }
.nav-links a.labs { border-bottom: 2px solid var(--cyan); padding-bottom: 2px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 22px; border-radius: 999px;
  text-decoration: none; font-weight: 750; font-size: 16px;
  border: 2px solid transparent;
}
.btn-dark { background: var(--void); color: #fff; }
.btn-green { background: var(--green); color: #fff; }
.btn-ghost { border-color: var(--ink); background: transparent; }
.hero { display: grid; gap: 36px; padding: 52px 0 20px; align-items: center; }
@media (min-width: 900px) { .hero { grid-template-columns: 1.05fr .95fr; } }
.kicker { letter-spacing: .18em; font-size: 12px; font-weight: 800; margin: 0 0 10px; }
.kicker a { border-bottom: 2px solid var(--cyan); text-decoration: none; }
h1 { font: 750 54px/1.05 Georgia, "Iowan Old Style", serif; margin: 0 0 16px; }
h2 { font: 750 36px/1.15 Georgia, serif; margin: 0 0 12px; }
h3 { font: 750 22px/1.25 Georgia, serif; margin: 0 0 8px; }
.lead { font-size: 21px; color: #2a3340; max-width: 40rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 16px; }
.signals { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; list-style: none; }
.signals li {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 999px; padding: 6px 12px; font-size: 14px;
}
.hero-visual .photo {
  width: 100%; height: 460px; object-fit: cover;
  border-radius: 32px; box-shadow: var(--shadow);
}
.features { display: grid; gap: 14px; }
@media (min-width: 720px) { .features { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) { .features { grid-template-columns: 1fr 1fr 1fr 1fr; } }
.feature {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 18px;
  min-height: 168px;
}
.feature small { letter-spacing: .12em; font-size: 11px; font-weight: 800; color: var(--green); }
.stage { display: grid; gap: 28px; }
@media (min-width: 900px) { .stage { grid-template-columns: 1fr 1fr; } }
.phone {
  width: min(320px, 100%); margin: 0 auto; background: #111;
  border-radius: 38px; padding: 12px; box-shadow: var(--shadow); color: var(--ink);
}
.phone-screen { background: var(--paper); border-radius: 28px; overflow: hidden; min-height: 540px; }
.phone-bar { background: var(--void); color: #eaf7ff; padding: 14px 16px; }
.phone-bar .k { letter-spacing: .16em; font-size: 11px; margin: 0; opacity: .7; }
.phone-bar h4 { margin: 4px 0 0; font-size: 20px; }
.phone-body { padding: 16px; }
.dot { width: 14px; height: 14px; border-radius: 50%; display: inline-block; }
.dot-g { background: var(--green); } .dot-a { background: var(--amber); }
.row {
  display: flex; gap: 10px; align-items: center;
  background: var(--card); border: 2px solid var(--line);
  border-radius: 16px; padding: 12px; margin-bottom: 10px;
}
.row b { font-size: 20px; } .row span { display: block; font-size: 13px; color: var(--muted); }
.note { background: #fff8c8; border: 3px solid var(--amber); border-radius: 14px; padding: 12px; margin: 10px 0; }
.big { background: var(--void); color: #fff; text-align: center; border-radius: 16px; padding: 20px 10px; font-weight: 800; }
.alert-demo { background: var(--red); color: #fff; border-radius: 14px; padding: 12px; margin: 10px 0; font-weight: 800; }
section.band { padding: 64px 0; }
.band-dark { background: var(--void); color: #eaf7ff; }
.band-dark .muted { color: #9bb0c0; }
.grid-2, .grid-3 { display: grid; gap: 16px; }
@media (min-width: 720px) { .grid-2 { grid-template-columns: 1fr 1fr; } .grid-3 { grid-template-columns: 1fr 1fr 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.band-dark .card { background: #0d2035; border-color: rgba(34,200,255,.18); color: #eaf7ff; }
.steps { counter-reset: step; display: grid; gap: 14px; }
@media (min-width: 800px) { .steps { grid-template-columns: 1fr 1fr; } }
.step { background: var(--card); border-radius: var(--radius); padding: 22px; border: 1px solid var(--line); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  display: block; color: var(--green); font-weight: 800; letter-spacing: .12em; margin-bottom: 8px; font-size: 13px;
}
.split { display: grid; gap: 28px; align-items: center; }
@media (min-width: 860px) { .split { grid-template-columns: 1.05fr .95fr; } }
.split img { border-radius: 28px; height: 360px; width: 100%; object-fit: cover; box-shadow: var(--shadow); }
.limits { font-size: 20px; }
.limits li { margin: .4em 0; }
footer { background: var(--void); color: #c5d5e0; padding: 40px 0 52px; font-size: 15px; }
footer a { color: var(--cyan); }
.foot-brand { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.foot-brand img { width: 36px; height: 36px; border-radius: 10px; }
.muted { color: var(--muted); }
.photo-caption { font-size: 14px; color: var(--muted); margin-top: 10px; text-align: center; }
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }