:root { --bg: #fafafa; --fg: #111; --muted: #6b6b6b; --line: #e4e4e4; --btn: #111; --btn-fg: #fff; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d0d0d; --fg: #f2f2f2; --muted: #8f8f8f; --line: #262626; --btn: #f2f2f2; --btn-fg: #0d0d0d; }
}
* { box-sizing: border-box; margin: 0; }
body { background: var(--bg); color: var(--fg); font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased; }
main { max-width: 560px; margin: 0 auto; padding: 18vh 20px 64px; }
h1 { font-size: clamp(36px, 8vw, 56px); line-height: 1.05; letter-spacing: -0.03em; font-weight: 700; }
p { color: var(--muted); margin-top: 16px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; align-items: center; }
.button { display: inline-block; padding: 12px 20px; border-radius: 10px; background: var(--btn); color: var(--btn-fg);
  text-decoration: none; font-weight: 600; border: 0; font: inherit; font-weight: 600; cursor: pointer; }
.link { color: var(--fg); text-decoration: none; border-bottom: 1px solid var(--line); }
.small { font-size: 13px; }
ul { list-style: none; padding: 0; margin-top: 48px; border-top: 1px solid var(--line); }
li { padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--muted); }
li b { color: var(--fg); font-weight: 600; }
code { display: block; margin-top: 24px; padding: 14px; border: 1px solid var(--line); border-radius: 10px;
  font: 13px/1.4 ui-monospace, Menlo, monospace; word-break: break-all; user-select: all; }
footer { margin-top: 48px; font-size: 13px; color: var(--muted); }