/* Shared styles for static content pages (landing, guides, policies).
   Plain CSS on purpose: no render-blocking CDN, good Core Web Vitals. */
:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --brand: #16a34a;
  --brand-dark: #15803d;
  --brand-soft: #f0fdf4;
  --callout: #fffbeb;
  --callout-border: #fcd34d;
  --max: 1100px;
  --read: 720px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #020617;
    --surface: #0f172a;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --border: #1e293b;
    --brand: #22c55e;
    --brand-dark: #4ade80;
    --brand-soft: #052e16;
    --callout: #1c1917;
    --callout-border: #a16207;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--brand-dark); }
a:hover { text-decoration: none; }
img, svg { max-width: 100%; height: auto; }
.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 16px; }
.read { max-width: var(--read); margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: var(--surface); border-bottom: 1px solid var(--border); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 12px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--text); text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav a { padding: 8px 12px; border-radius: 10px; color: var(--muted); font-weight: 600; font-size: 14px; text-decoration: none; }
.nav a:hover { color: var(--text); background: var(--brand-soft); }
.nav a.cta { background: var(--brand); color: #fff; }
.nav a.cta:hover { background: var(--brand-dark); color: #fff; }

/* Buttons */
.btn { display: inline-block; padding: 12px 22px; border-radius: 12px; font-weight: 700; text-decoration: none; border: 1px solid transparent; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { border-color: var(--border); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: var(--brand); }

/* Hero */
.hero { padding: 56px 0 40px; text-align: center; }
.hero h1 { font-size: clamp(30px, 5vw, 48px); line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p { max-width: 640px; margin: 0 auto 28px; color: var(--muted); font-size: 18px; }
.hero .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* Sections & cards */
section.block { padding: 40px 0; }
section.block h2 { font-size: 28px; line-height: 1.25; margin: 0 0 8px; letter-spacing: -0.01em; }
section.block > .container > p.lead { color: var(--muted); margin: 0 0 24px; max-width: 680px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card a.card-link { text-decoration: none; color: inherit; display: block; }
.card:hover { border-color: var(--brand); }
.tag { display: inline-block; font-size: 12px; font-weight: 700; color: var(--brand-dark); background: var(--brand-soft); padding: 2px 10px; border-radius: 999px; margin-bottom: 8px; }

/* Articles & policy pages */
.page { padding: 40px 0 56px; }
.page h1 { font-size: clamp(28px, 4.5vw, 40px); line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.02em; }
.page h2 { font-size: 24px; line-height: 1.3; margin: 36px 0 8px; }
.page h3 { font-size: 19px; margin: 24px 0 6px; }
.page p, .page li { color: var(--text); }
.page ul, .page ol { padding-left: 22px; }
.page li { margin: 4px 0; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.breadcrumb { font-size: 14px; color: var(--muted); margin-bottom: 12px; }
.breadcrumb a { color: var(--muted); }
.callout { background: var(--callout); border: 1px solid var(--callout-border); border-radius: 14px; padding: 14px 18px; margin: 24px 0; font-size: 15px; }
.callout strong { display: block; margin-bottom: 2px; }
.cta-box { background: var(--brand-soft); border: 1px solid var(--border); border-radius: 16px; padding: 20px; margin: 32px 0; text-align: center; }
.cta-box p { margin: 0 0 12px; }
table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 15px; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
th { background: var(--brand-soft); }
code { background: var(--brand-soft); padding: 1px 6px; border-radius: 6px; font-size: 0.92em; }
.refs { font-size: 14px; color: var(--muted); }
.refs li { margin: 6px 0; }

/* FAQ */
details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 700; }
details p { margin: 10px 0 0; color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); padding: 32px 0; margin-top: 40px; font-size: 14px; color: var(--muted); }
.site-footer .links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 12px 0; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); }
.site-footer p { margin: 6px 0; }