:root {
  --bg: #ffffff;
  --bg-soft: #f6f7fb;
  --fg: #14152b;
  --muted: #5b5d78;
  --line: #e6e7f0;
  --primary: #4f46e5;
  --primary-h: #4338ca;
  --soft: #eef0ff;
  --code: #f1f2f8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0f1d;
    --bg-soft: #14162a;
    --fg: #e8e9f5;
    --muted: #9a9cba;
    --line: #24263d;
    --primary: #818cf8;
    --primary-h: #a5b4fc;
    --soft: #1f1d4d;
    --code: #1a1c33;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--primary); }
a:hover { color: var(--primary-h); }
img { max-width: 100%; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--bg); padding: 6px 10px; z-index: 10; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 820px; }

.top { border-bottom: 1px solid var(--line); position: sticky; top: 0; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); z-index: 5; }
.bar { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; color: var(--fg); text-decoration: none; font-size: 17px; }
nav[aria-label="Main"] { display: flex; align-items: center; gap: 18px; }
nav[aria-label="Main"] a { color: var(--fg); text-decoration: none; font-size: 15px; }
nav[aria-label="Main"] a:hover { color: var(--primary); }
.btn { display: inline-block; background: var(--primary); color: #fff !important; padding: 8px 14px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.btn:hover { background: var(--primary-h); }
.btn.big { padding: 12px 20px; font-size: 16px; }
.ghost { margin-left: 14px; font-weight: 600; text-decoration: none; }

.hero { padding: 72px 0 32px; background: linear-gradient(180deg, var(--soft), transparent); }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: 13px; font-weight: 600; color: var(--primary); margin: 0 0 10px; }
.hero h1 { font-size: clamp(30px, 5vw, 50px); line-height: 1.12; margin: 0 0 16px; letter-spacing: -.02em; }
.hero h1 span { color: var(--muted); }
.lead { font-size: 18px; color: var(--muted); max-width: 720px; }
.cta { margin-top: 28px; }
.facts { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.facts li { border: 1px solid var(--line); background: var(--bg); border-radius: 999px; padding: 6px 14px; font-size: 14px; color: var(--muted); }
.facts strong { color: var(--fg); }

h2 { margin-top: 44px; letter-spacing: -.01em; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.card { display: block; border: 1px solid var(--line); border-radius: 12px; padding: 18px; text-decoration: none; color: var(--fg); background: var(--bg); transition: border-color .15s; }
.card:hover { border-color: var(--primary); }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }

.table { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin: 8px 0 16px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; color: var(--muted); font-weight: 600; white-space: nowrap; }
.r { text-align: right; white-space: nowrap; }
.mono, code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
code { background: var(--code); padding: 1px 5px; border-radius: 4px; font-size: .92em; }
pre { background: var(--code); padding: 14px 16px; border-radius: 10px; overflow-x: auto; line-height: 1.5; }
pre code { background: none; padding: 0; }
.muted { color: var(--muted); }
.family { margin-top: 20px; }
.family h3 { margin: 0; }
.family p { margin: 2px 0 6px; }

.page { padding-top: 24px; padding-bottom: 24px; }
.page article { max-width: 820px; }
.crumbs { font-size: 14px; color: var(--muted); }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--primary); }
.page h1 { font-size: clamp(28px, 4vw, 40px); line-height: 1.18; margin: 14px 0 4px; letter-spacing: -.02em; }
.updated { color: var(--muted); font-size: 13px; margin: 0 0 18px; }
article h2 { font-size: 24px; }
article h3 { font-size: 19px; margin-top: 28px; }
blockquote { margin: 16px 0; padding: 4px 16px; border-left: 3px solid var(--primary); background: var(--bg-soft); }

.faq details { border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin: 10px 0; background: var(--bg); }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 8px 0 0; color: var(--muted); }

.cta-box { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin: 40px 0; padding: 24px; border-radius: 14px; background: var(--soft); flex-wrap: wrap; }
.cta-box h2 { margin: 0 0 4px; }
.cta-box p { margin: 0; color: var(--muted); }
.related ul { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; }
.related li { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.related li a { font-weight: 600; text-decoration: none; display: block; }
.related li span { color: var(--muted); font-size: 14px; }

footer { border-top: 1px solid var(--line); margin-top: 56px; padding: 36px 0 20px; background: var(--bg-soft); }
.foot { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 24px; }
.about-col { grid-column: span 2; }
.foot h4 { margin: 0 0 8px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.foot div > a:not(.brand) { display: block; color: var(--fg); text-decoration: none; font-size: 14px; margin: 5px 0; }
.foot div > a:not(.brand):hover { color: var(--primary); }
.foot p { color: var(--muted); font-size: 14px; }
.copy { color: var(--muted); font-size: 13px; margin-top: 24px; }

@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  nav[aria-label="Main"] a:not(.btn):not(.signin) { display: none; }
  .about-col { grid-column: span 1; }
}
@media (max-width: 480px) {
  .signin { display: none; }
  .ghost { display: inline-block; margin: 12px 0 0; }
}