/* Pinned AI — shared site styles. Monochrome, matches the iOS app. */
:root {
  --bg: #0A0A0B;
  --surface: #151517;
  --surface-2: #1D1D20;
  --border: #2A2A2E;
  --text: #FFFFFF;
  --text-2: #9B9BA1;
  --text-3: #5E5E64;
  --accent: #FFFFFF;
  --max: 1080px;
  --prose: 720px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.mono { font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace; }

a { color: var(--text); text-decoration: none; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,10,11,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: 1.5px; font-size: 15px; }
.brand .pin {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px;
}
.brand .pin svg { transform: rotate(45deg); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--text-2); font-size: 14px; font-weight: 500; transition: color .15s; }
.nav-links a:hover { color: var(--text); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: var(--bg);
  font-weight: 700; font-size: 15px;
  padding: 13px 22px; border-radius: 14px;
  transition: transform .15s, opacity .15s;
}
.btn:hover { transform: translateY(-1px); opacity: .92; }
.btn-ghost {
  background: transparent; color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface); }

/* ---------- Hero ---------- */
.hero { padding: 120px 0 90px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% -10%, rgba(255,255,255,0.06), transparent 70%);
  pointer-events: none;
}
.eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: 2px; font-weight: 600;
  color: var(--text-3); text-transform: uppercase; margin-bottom: 24px;
  padding: 7px 14px; border: 1px solid var(--border); border-radius: 999px;
}
.hero h1 {
  font-size: clamp(40px, 7vw, 76px); line-height: 1.02; font-weight: 800;
  letter-spacing: -1.5px; margin-bottom: 22px;
}
.hero p.sub {
  font-size: clamp(17px, 2.2vw, 21px); color: var(--text-2);
  max-width: 560px; margin: 0 auto 36px;
}
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.fine { color: var(--text-3); font-size: 13px; margin-top: 22px; }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
.section-head { text-align: center; max-width: 600px; margin: 0 auto 52px; }
.section-head .tag { font-size: 12px; letter-spacing: 2px; font-weight: 600; color: var(--text-3); text-transform: uppercase; }
.section-head h2 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.8px; margin: 12px 0 14px; font-weight: 800; }
.section-head p { color: var(--text-2); font-size: 17px; }

/* ---------- Feature grid ---------- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px; padding: 26px;
  transition: border-color .2s, transform .2s;
}
.card:hover { border-color: #3a3a40; transform: translateY(-2px); }
.card .ico {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--surface-2); display: grid; place-items: center; margin-bottom: 18px;
}
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.card p { color: var(--text-2); font-size: 15px; }

/* ---------- Disclaimer band ---------- */
.band {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 24px; padding: 36px; text-align: center; max-width: var(--prose); margin: 0 auto;
}
.band h3 { font-size: 20px; margin-bottom: 10px; }
.band p { color: var(--text-2); font-size: 15px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 48px 0 60px; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { color: var(--text-2); font-size: 14px; }
.footer-links a:hover { color: var(--text); }
.footer .copy { color: var(--text-3); font-size: 13px; }

/* ---------- Legal / prose pages ---------- */
.legal { padding: 60px 0 40px; }
.legal-wrap { max-width: var(--prose); margin: 0 auto; }
.legal h1 { font-size: clamp(32px, 5vw, 44px); letter-spacing: -1px; margin-bottom: 10px; font-weight: 800; }
.legal .updated { color: var(--text-3); font-size: 14px; margin-bottom: 14px; }
.legal .notice {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 18px; font-size: 14px; color: var(--text-2); margin: 24px 0 40px;
}
.legal h2 {
  font-size: 22px; font-weight: 700; margin: 40px 0 12px;
  padding-top: 8px;
}
.legal h3 { font-size: 17px; font-weight: 700; margin: 26px 0 8px; color: var(--text); }
.legal p, .legal li { color: var(--text-2); font-size: 16px; margin-bottom: 14px; }
.legal ul, .legal ol { padding-left: 22px; margin-bottom: 14px; }
.legal li { margin-bottom: 8px; }
.legal strong { color: var(--text); font-weight: 600; }
.legal a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; }
.toc {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 20px 24px; margin-bottom: 40px;
}
.toc h4 { font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-3); margin-bottom: 12px; }
.toc ol { padding-left: 18px; margin: 0; }
.toc li { margin-bottom: 6px; font-size: 15px; }
.toc a { color: var(--text-2); text-decoration: none; }
.toc a:hover { color: var(--text); }

.back { display: inline-flex; align-items: center; gap: 6px; color: var(--text-2); font-size: 14px; margin-bottom: 30px; }
.back:hover { color: var(--text); }

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .nav-links { gap: 18px; }
  .nav-links a.hide-sm { display: none; }
  .hero { padding: 80px 0 60px; }
}