/* Layout: narrow reading column for documents; home page alternates copy and phone frames. Dark-first, like the app. */
:root {
  --bg: #121110;
  --surface: #1c1b19;
  --raised: #262422;
  --text: #f2efe8;
  --text-2: #b3ada1;
  --text-3: #857f74;
  --line: #2e2c29;
  --accent: #3b4a8c;
  --accent-text: #ffffff;
  --gold: #e0b43c;
  --green: #5fb36b;
  --frame: #050505;
  --radius: 20px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f3f2ee; --surface: #ffffff; --raised: #e9e7e1; --text: #1b1a17; --text-2: #5c574e; --text-3: #8a8479;
    --line: #dfdcd4; --accent: #3b4a8c; --accent-text: #ffffff; --gold: #9a6f00; --green: #2f8a3e; --frame: #1b1a17;
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #f3f2ee; --surface: #ffffff; --raised: #e9e7e1; --text: #1b1a17; --text-2: #5c574e; --text-3: #8a8479;
  --line: #dfdcd4; --accent: #3b4a8c; --accent-text: #ffffff; --gold: #9a6f00; --green: #2f8a3e; --frame: #1b1a17;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.55 var(--font); }
a { color: inherit; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
img { max-width: 100%; }
.wrap { max-width: 1040px; margin: 0 auto; padding-inline: 20px; }
.narrow { max-width: 720px; }
h1, h2, h3 { font-family: var(--font-display); text-wrap: balance; }

header.top { padding-block: 20px; }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
nav.top { display: flex; gap: 18px; }
nav.top a { color: var(--text-2); text-decoration: none; font-size: 15px; }
nav.top a:hover { color: var(--text); }

.phone { width: 270px; max-width: 100%; aspect-ratio: 690 / 1500; border-radius: 44px; background: var(--frame);
  padding: 9px; box-shadow: 0 30px 60px -20px rgba(0,0,0,.55), 0 0 0 1px var(--line); flex: 0 0 auto; }
.phone img { display: block; width: 100%; height: 100%; border-radius: 36px; object-fit: cover; }
.phone.small { width: 220px; border-radius: 38px; padding: 8px; }
.phone.small img { border-radius: 31px; }

.hero { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 48px; padding-block: 40px 72px; }
.hero > div { min-width: 0; }
.eyebrow { font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); font-weight: 600; }
.hero h1 { font-size: clamp(38px, 6vw, 62px); line-height: 1.04; letter-spacing: -0.025em; margin: 14px 0 18px; }
.hero p.lead { font-size: 20px; color: var(--text-2); margin: 0; max-width: 32ch; }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 20px; margin-top: 30px; }
.cta { display: inline-flex; align-items: center; gap: 10px; padding: 15px 26px; border-radius: 999px;
  background: var(--accent); color: var(--accent-text); font-weight: 600; text-decoration: none; }
.cta:hover { filter: brightness(1.1); }
.note { color: var(--text-3); font-size: 14px; }

.facts { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
.facts div { padding: 22px 8px; text-align: center; }
.facts div + div { border-left: 1px solid var(--line); }
.facts b { display: block; font-family: var(--font-display); font-size: 34px; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.facts span { color: var(--text-2); font-size: 14px; }

.section-title { font-size: clamp(30px, 4.5vw, 44px); letter-spacing: -0.02em; margin: 88px 0 8px; }
.section-sub { color: var(--text-2); margin: 0 0 40px; max-width: 56ch; }
.step { display: grid; grid-template-columns: 1fr auto; gap: 56px; align-items: center; padding-block: 48px; border-top: 1px solid var(--line); }
.step.flip { grid-template-columns: auto 1fr; }
.step.flip .copy { order: 2; }
.step .copy { min-width: 0; max-width: 460px; }
.step .num { font-family: var(--font-display); font-size: 15px; font-weight: 700; color: var(--text-3); font-variant-numeric: tabular-nums; }
.step h3 { font-size: 30px; line-height: 1.15; letter-spacing: -0.015em; margin: 6px 0 12px; }
.step p { color: var(--text-2); margin: 0 0 12px; }
.phones { display: flex; gap: 18px; align-items: flex-start; }
.phones .phone:nth-child(2) { margin-top: 48px; }

.modes { display: grid; gap: 10px; margin: 18px 0 0; padding: 0; list-style: none; }
.modes li { color: var(--text-2); }
.modes b { color: var(--text); }

.rule { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 20px; }
.chip { display: inline-flex; align-items: center; gap: 7px; padding: 8px 13px; border-radius: 999px; background: var(--raised); font-size: 15px; font-weight: 600; }
.chip .tick { color: var(--green); }
.chip.done { background: color-mix(in srgb, var(--green) 18%, transparent); color: var(--green); }
.rule .op { color: var(--text-3); font-weight: 600; }
.ring { width: 220px; height: 220px; border-radius: 50%; display: grid; place-items: center; text-align: center;
  background: conic-gradient(var(--text) 0 26%, var(--text-3) 26% 34%, var(--raised) 34% 100%); position: relative; flex: 0 0 auto; }
.ring::before { content: ""; position: absolute; inset: 14px; border-radius: 50%; background: var(--bg); }
.ring div { position: relative; }
.ring b { display: block; font-family: var(--font-display); font-size: 52px; letter-spacing: -0.02em; line-height: 1; font-variant-numeric: tabular-nums; }
.ring span { color: var(--text-2); font-size: 14px; }
.ring small { display: block; color: var(--text-3); font-size: 13px; margin-top: 4px; }

.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.plan { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; min-width: 0; }
.plan.premium { border-color: var(--accent); }
.plan h3 { margin: 0 0 4px; font-size: 22px; }
.plan .price { color: var(--text-2); margin: 0 0 16px; font-size: 15px; }
.plan ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 9px; }
.plan li { display: flex; gap: 10px; color: var(--text-2); }
.plan li::before { content: "✓"; color: var(--green); font-weight: 700; }

.closing { text-align: center; padding-block: 88px 64px; }
.closing h2 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.02em; margin: 0 0 22px; }

main.doc { padding-block: 16px 48px; }
main.doc h1 { font-size: 36px; letter-spacing: -0.015em; margin: 8px 0 4px; }
main.doc .updated { color: var(--text-3); font-size: 14px; margin-bottom: 28px; }
main.doc h2 { font-size: 21px; margin: 32px 0 8px; }
main.doc p, main.doc li { color: var(--text-2); }
main.doc strong { color: var(--text); }
main.doc ul { padding-left: 22px; }
main.doc .summary { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
main.doc .summary p { margin: 0; color: var(--text); }
details { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 14px 18px; margin: 10px 0; }
details summary { cursor: pointer; font-weight: 600; color: var(--text); }
details p { margin: 10px 0 2px; }

footer { border-top: 1px solid var(--line); padding-block: 26px 44px; color: var(--text-3); font-size: 14px; }
footer .links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
footer .links a { color: var(--text-2); text-decoration: none; }
footer .links a:hover { color: var(--text); }
footer p { margin: 12px 0 0; max-width: 80ch; }

@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; justify-items: center; text-align: center; gap: 36px; padding-block: 24px 48px; }
  .hero p.lead { margin-inline: auto; }
  .cta-row { justify-content: center; }
  .facts { grid-template-columns: repeat(2, 1fr); }
  .facts div:nth-child(3) { border-left: 0; }
  .facts div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .step, .step.flip { grid-template-columns: 1fr; gap: 28px; justify-items: center; }
  .step.flip .copy { order: 0; }
  .plans { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .phones { gap: 10px; width: 100%; justify-content: center; }
  .phones .phone.small { width: calc(50% - 5px); border-radius: 30px; padding: 6px; }
  .phones .phone.small img { border-radius: 25px; }
  .phones .phone:nth-child(2) { margin-top: 32px; }
  .ring { width: 190px; height: 190px; }
}
@media (prefers-reduced-motion: no-preference) { .cta { transition: filter .15s; } }