:root { --paper: #0e1112; --surface: #151a1b; --ink: #f3f5f2; --muted: #9aa29b; --line: #262d2e; --bamboo: #4cc38a; --bamboo-ink: #0b1a12;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color-scheme: dark; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 var(--sans); padding: env(safe-area-inset-top, 0px) 16px env(safe-area-inset-bottom, 0px); }
main, .top, .foot { max-width: 760px; margin-inline: auto; }
h1, h2, h3 { text-wrap: balance; line-height: 1.2; margin: 0; }
p { margin: 0; }
a { color: var(--bamboo); }
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-block: 20px; max-width: 980px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: var(--ink); text-decoration: none; }
.mark { width: 30px; height: 30px; color: var(--ink); }
.nav { display: flex; gap: 22px; font-size: 15px; }
.nav a { color: var(--muted); text-decoration: none; white-space: nowrap; }
.nav a:hover { color: var(--ink); }
main { padding-block: 32px 64px; }
.guide { display: grid; gap: 40px; }
.guide h1 { font-size: clamp(34px, 6vw, 52px); font-weight: 700; letter-spacing: -0.03em; }
.guide > p:first-of-type + p, .guide .lede + p { margin-top: -16px; }
.lede { color: var(--muted); font-size: 18px; max-width: 65ch; }
.guide section { display: grid; gap: 14px; padding-top: 20px; border-top: 1px solid var(--line); }
.guide h2 { font-size: 24px; font-weight: 700; letter-spacing: -0.01em; }
.guide h3 { font-size: 17px; }
.guide ul, .guide ol { margin: 0; padding-left: 22px; display: grid; gap: 8px; max-width: 70ch; }
.switch { display: grid; gap: 8px; padding: 16px 18px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); }
.switch ul { color: var(--muted); font-size: 15px; }
.fine { color: var(--muted); font-size: 14px; max-width: 70ch; }
.cta { text-align: center; justify-items: center; padding: 28px 20px !important; border: 1px solid var(--line) !important; border-radius: 14px; background: var(--surface); }
.btn { display: inline-block; font-weight: 700; padding: 12px 22px; border-radius: 10px; text-decoration: none; }
.btn.primary { background: var(--bamboo); color: var(--bamboo-ink); }
.foot { padding-block: 20px 40px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); max-width: 980px; }
.foot-guides { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 12px; }
.foot-guides span { color: var(--ink); font-weight: 600; }
.foot-guides a { color: var(--muted); text-decoration: none; }
.foot-guides a:hover { color: var(--ink); }
@media (max-width: 720px) { .nav a[href="/#how"] { display: none; } }