:root {
  --bg: #fbfdfe;
  --surface: #ffffff;
  --text: #10242f;
  --muted: #536b78;
  --line: #dbe7ec;
  --brand: #1b6f8f;
  --brand-strong: #0f5576;
  --accent: #4fae7b;
  --soft: #eef6f9;
  --shadow: 0 1px 2px rgba(16, 36, 47, 0.06), 0 8px 24px rgba(16, 36, 47, 0.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1a22;
    --surface: #12242e;
    --text: #e8f1f5;
    --muted: #9ab0bc;
    --line: #23404d;
    --brand: #5ec0e0;
    --brand-strong: #8ad3ec;
    --accent: #6fcf9a;
    --soft: #112530;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); }
img { max-width: 100%; display: block; }
.wrap { width: min(1080px, 100% - 40px); margin-inline: auto; }

/* header */
header.site {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
header.site .wrap { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--text); text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 9px; background: #fff; }
nav.main { margin-left: auto; display: flex; align-items: center; gap: 22px; }
nav.main a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 15px; }
nav.main a:hover { color: var(--text); }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 12px; font-weight: 700;
  text-decoration: none; border: 1px solid transparent; font-size: 16px;
}
.btn.primary { background: var(--brand-strong); color: #fff; }
.btn.primary:hover { filter: brightness(1.1); }
.btn.ghost { border-color: var(--line); color: var(--text); background: var(--surface); }
.btn.small { padding: 8px 16px; font-size: 14.5px; }
@media (prefers-color-scheme: dark) { .btn.primary { background: var(--brand); color: #06222d; } }
@media (max-width: 720px) { nav.main a.hide-sm { display: none; } }

/* hero */
.hero { padding: 72px 0 56px; }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-block; padding: 5px 12px; border-radius: 999px; background: var(--soft); color: var(--brand); font-weight: 700; font-size: 13px; letter-spacing: 0.02em; margin-bottom: 18px; }
h1 { font-size: clamp(34px, 5.2vw, 54px); line-height: 1.08; margin: 0 0 18px; letter-spacing: -0.02em; }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 28px; max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-art { justify-self: center; }
.hero-art img { width: min(380px, 80vw); border-radius: 32px; box-shadow: var(--shadow); background: #fff; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; gap: 28px; } .hero-art { order: -1; } .hero-art img { width: 132px; border-radius: 24px; } .hero { padding-top: 32px; } }

/* stats */
.stats { border-block: 1px solid var(--line); background: var(--surface); }
.stats .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 26px 12px; text-align: center; }
.stat b { display: block; font-size: 30px; line-height: 1.1; color: var(--brand); letter-spacing: -0.01em; }
.stat span { color: var(--muted); font-size: 14.5px; }
@media (max-width: 720px) { .stats .wrap { grid-template-columns: repeat(2, 1fr); } }

/* sections */
section.block { padding: 72px 0 8px; }
section.block h2 { font-size: clamp(26px, 3.6vw, 36px); margin: 0 0 10px; letter-spacing: -0.015em; }
section.block > .wrap > p.sub { color: var(--muted); max-width: 40em; margin: 0 0 34px; font-size: 17px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 22px; box-shadow: var(--shadow); }
.card h3 { margin: 12px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.icon { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; background: var(--soft); }
.tag { display: inline-block; margin-left: 8px; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 700; background: var(--soft); color: var(--muted); vertical-align: middle; }

/* pricing */
.plans { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; max-width: 820px; }
@media (max-width: 700px) { .plans { grid-template-columns: 1fr; } }
.plan.best { border-color: var(--brand); }
.plan h3 { margin: 0 0 8px; }
.plan .price { display: flex; align-items: baseline; gap: 10px; margin: 0 0 12px; }
.plan .price b { font-size: 34px; color: var(--brand); letter-spacing: -0.01em; }
.plan .price span { color: var(--muted); font-size: 15px; }
.plan ul { margin: 0 0 12px; padding-left: 20px; color: var(--text); font-size: 15.5px; }
.plan li { margin: 4px 0; }
.plan .note { font-size: 13.5px; }
.fine { color: var(--muted); font-size: 14.5px; max-width: 46em; margin: 18px 0 20px; }

/* papers */
.papers { display: flex; flex-wrap: wrap; gap: 10px; }
.paper { padding: 9px 16px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); font-weight: 700; font-size: 15px; }
.paper small { color: var(--muted); font-weight: 600; margin-left: 6px; }

/* callout */
.callout { margin-top: 72px; background: linear-gradient(135deg, var(--brand-strong), #2c9b78); color: #fff; border-radius: 24px; padding: 40px; display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 24px; align-items: center; }
.callout h2 { color: #fff; margin: 0 0 8px; font-size: clamp(24px, 3.2vw, 32px); }
.callout p { margin: 0; opacity: 0.92; font-size: 17px; }
.callout .btn { background: #fff; color: #0f4a66; justify-self: end; }
@media (max-width: 760px) { .callout { grid-template-columns: 1fr; padding: 28px; } .callout .btn { justify-self: start; } }

/* footer */
footer.site { margin-top: 72px; border-top: 1px solid var(--line); padding: 30px 0 44px; color: var(--muted); font-size: 14px; }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; justify-content: space-between; }
footer.site p { margin: 0; max-width: 46em; }

/* legal pages (generated by tool/web/legal_pages.py) */
footer.site .legal { display: flex; flex-wrap: wrap; gap: 6px 18px; }
footer.site .legal a { color: var(--muted); }
main.doc { max-width: 760px; padding-top: 40px; }
main.doc h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 20px; }
main.doc h2 { font-size: 22px; margin: 36px 0 10px; }
main.doc p, main.doc li { font-size: 16.5px; line-height: 1.65; }
main.doc ul { padding-left: 22px; }
main.doc li { margin: 4px 0; }
main.doc blockquote { margin: 16px 0; padding: 12px 16px; border-left: 4px solid var(--accent); background: var(--soft); border-radius: 0 10px 10px 0; color: var(--muted); }
main.doc code { background: var(--soft); padding: 1px 6px; border-radius: 6px; font-size: 0.92em; }
main.doc .tablewrap { overflow-x: auto; margin: 16px 0; }
main.doc table { border-collapse: collapse; width: 100%; font-size: 15.5px; }
main.doc th, main.doc td { text-align: left; padding: 9px 12px; border: 1px solid var(--line); vertical-align: top; }
main.doc th { background: var(--soft); }
main.doc mark { background: #fde68a; color: #422006; padding: 0 3px; border-radius: 4px; }
.draftbanner { margin-bottom: 20px; padding: 12px 16px; border-radius: 10px; background: #fef3c7; color: #422006; border: 1px solid #f59e0b; font-size: 15px; }