:root {
  color-scheme: dark;
  --bg: #0a0a0a;
  --surface: #111111;
  --border: #292929;
  --ink: #fafafa;
  --muted: #adadad;
  --subtle: #858585;
  --accent: #fb4a67;
  --success: #3fb950;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-underline-offset: 3px; }
.shell { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }
.topbar { border-bottom: 1px solid var(--border); }
.topbar-inner { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-size: 18px; font-weight: 800; text-decoration: none; }
.brand img { width: 25px; height: 25px; }
.topbar nav { display: flex; gap: 22px; font-size: 14px; }
.topbar nav a { color: var(--muted); text-decoration: none; }
.topbar nav a:hover { color: var(--ink); }
.hero { padding: 80px 0 48px; border-bottom: 1px solid var(--border); }
.eyebrow { margin: 0 0 14px; color: var(--accent); font: 700 12px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; text-transform: uppercase; }
h1 { max-width: 900px; margin: 0 0 20px; font-size: clamp(40px, 7vw, 68px); line-height: 1.02; letter-spacing: -.045em; }
.lede { max-width: 760px; margin: 0 0 20px; color: var(--muted); font-size: 20px; line-height: 1.6; }
.byline { color: var(--subtle); font-size: 14px; }
.layout { display: grid; grid-template-columns: minmax(0, 720px) 260px; gap: 70px; align-items: start; padding: 60px 0 100px; }
article { min-width: 0; }
article h2 { margin: 58px 0 16px; font-size: 31px; line-height: 1.15; letter-spacing: -.025em; }
article h2:first-child { margin-top: 0; }
article h3 { margin: 34px 0 10px; font-size: 21px; }
article p, article li { color: var(--muted); font-size: 17px; line-height: 1.75; }
article strong { color: var(--ink); }
article ul, article ol { padding-left: 24px; }
article li + li { margin-top: 9px; }
.answer { margin: 0 0 34px; padding: 22px 24px; border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border)); border-radius: 14px; background: color-mix(in srgb, var(--accent) 7%, var(--surface)); }
.answer p { margin: 0; color: var(--ink); }
.checklist { list-style: none; padding: 0; }
.checklist li { position: relative; padding: 16px 18px 16px 48px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.checklist li::before { content: "✓"; position: absolute; left: 18px; top: 16px; color: var(--success); font-weight: 900; }
.checklist li + li { margin-top: 10px; }
.note { margin: 30px 0; padding: 20px 22px; border-left: 3px solid var(--accent); background: var(--surface); }
.note p { margin: 0; }
.toc { position: sticky; top: 28px; padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.toc strong { display: block; margin-bottom: 12px; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; }
.toc a { display: block; padding: 6px 0; color: var(--muted); font-size: 14px; line-height: 1.4; text-decoration: none; }
.toc a:hover { color: var(--ink); }
.cta { margin-top: 60px; padding: 30px; border: 1px solid var(--border); border-radius: 16px; background: var(--surface); }
.cta h2 { margin-top: 0; }
.button { display: inline-flex; margin-top: 8px; padding: 12px 18px; border-radius: 9px; background: var(--accent); color: #0a0a0a; font-weight: 800; text-decoration: none; }
footer { padding: 34px 0; border-top: 1px solid var(--border); color: var(--subtle); font-size: 13px; }
.foot { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.foot a { color: var(--muted); }
@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; gap: 36px; }
  .toc { position: static; grid-row: 1; }
}
@media (max-width: 560px) {
  .topbar nav a:not(:last-child) { display: none; }
  .hero { padding-top: 58px; }
  .layout { padding-top: 42px; }
  article p, article li { font-size: 16px; }
}