:root {
  --bg: #fbfaf7; --surface: #ffffff; --ink: #1d1d1f; --muted: #5f6368; --line: #e6e2da;
  --accent: #1f6f5c; --accent-ink: #ffffff; --accent-soft: #e5f2ee; --warn-soft: #fff4dd; --warn-line: #e9c46a;
  --radius: 12px; --max: 760px; --wide: 1080px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121314; --surface: #1b1c1e; --ink: #ecebe8; --muted: #a3a6ab; --line: #2c2e31; --accent: #6cc5ab; --accent-ink: #0d1f1a; --accent-soft: #1c2f2a; --warn-soft: #2d2616; --warn-line: #8a6d23; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-size: 17px; line-height: 1.6; }
a { color: var(--accent); text-underline-offset: 2px; }
img { max-width: 100%; height: auto; }
.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 16px; }
.top { border-bottom: 1px solid var(--line); background: var(--surface); position: sticky; top: 0; z-index: 5; }
.top__in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 58px; flex-wrap: wrap; }
.logo { font-weight: 700; font-size: 20px; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 8px; letter-spacing: -0.01em; }
.logo b { color: var(--accent); }
.logo__mark { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); font-size: 17px; }
.nav { display: flex; gap: 16px; flex-wrap: wrap; font-size: 15px; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a[aria-current], .nav a:hover { color: var(--ink); }
.crumbs { font-size: 14px; color: var(--muted); margin: 18px 0 0; }
.crumbs a { color: var(--muted); }
.article { max-width: var(--max); margin: 0 auto 48px; }
.article__head h1, .hero h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.15; letter-spacing: -0.02em; margin: 12px 0 10px; }
.kicker { text-transform: uppercase; letter-spacing: .08em; font-size: 13px; color: var(--accent); font-weight: 700; margin: 24px 0 0; }
.lede { font-size: 19px; color: var(--muted); margin: 0 0 12px; }
.byline { font-size: 14px; color: var(--muted); margin: 0 0 20px; }
.prose h2 { font-size: 26px; line-height: 1.25; margin: 40px 0 10px; letter-spacing: -0.01em; }
.prose h3 { font-size: 20px; margin: 28px 0 6px; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 4px 0; }
.toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 18px; margin: 16px 0 8px; font-size: 15px; }
.toc p { margin: 0 0 4px; font-weight: 700; }
.toc ol { margin: 0; padding-left: 20px; }
.table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
caption { caption-side: bottom; text-align: left; font-size: 13px; color: var(--muted); padding: 8px 12px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); white-space: nowrap; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
.compare th[scope=row] { white-space: nowrap; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin: 18px 0 12px; scroll-margin-top: 80px; }
.card__head { display: flex; gap: 14px; align-items: center; }
.card__icon { border-radius: 13px; border: 1px solid var(--line); flex: none; }
.card__label { margin: 0; font-size: 13px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: .05em; }
.card__name { margin: 0; font-size: 22px; line-height: 1.2; }
.card__seller { margin: 0; color: var(--muted); font-size: 14px; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 8px 18px; margin: 14px 0 10px; }
.facts div { border-top: 1px solid var(--line); padding-top: 6px; }
.facts dt { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.facts dd { margin: 0; font-size: 15px; }
.card__links { margin: 6px 0 0; display: flex; gap: 14px; align-items: center; flex-wrap: wrap; font-size: 15px; }
.btn { background: var(--accent); color: var(--accent-ink); padding: 8px 14px; border-radius: 999px; text-decoration: none; font-weight: 600; }
.method, .disclosure, .callout { border-radius: var(--radius); padding: 12px 16px; margin: 18px 0; font-size: 15px; }
.method { background: var(--accent-soft); }
.disclosure { background: var(--warn-soft); border: 1px solid var(--warn-line); }
.callout { background: var(--surface); border-left: 4px solid var(--accent); }
.method p, .disclosure p, .callout p { margin: 4px 0; }
.sources, .related { border-top: 1px solid var(--line); margin-top: 36px; font-size: 15px; }
.sources h2, .related h2 { font-size: 18px; }
.hero { max-width: 820px; margin: 36px auto 12px; }
.pillars { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; }
.pillars li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; font-size: 15px; }
.home__cat { margin: 32px 0; }
.home__cat h2 a { color: var(--ink); text-decoration: none; }
.tiles { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.tile a { display: block; height: 100%; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; text-decoration: none; color: var(--ink); }
.tile a:hover { border-color: var(--accent); }
.tile__title { display: block; font-weight: 700; line-height: 1.3; }
.tile__desc { display: block; color: var(--muted); font-size: 14px; margin-top: 4px; }
.applist { list-style: none; padding: 0; columns: 3 220px; }
.applist a { display: flex; gap: 10px; align-items: center; padding: 6px 0; text-decoration: none; color: var(--ink); }
.applist img { border-radius: 8px; }
.foot { border-top: 1px solid var(--line); margin-top: 48px; padding: 20px 0 32px; font-size: 14px; color: var(--muted); }
.foot nav { display: flex; gap: 16px; flex-wrap: wrap; margin: 8px 0; }
.foot a { color: var(--muted); }
.foot__small { font-size: 13px; }
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav { gap: 12px; font-size: 14px; }
  .lede { font-size: 17px; }
}