:root {
  --bg: #fff;
  --text: #121216;
  --muted: #5f6070;
  --line: #e4e4ec;
  --blue: #0000e6;
  --link: #0000e6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0f;
    --text: #ececf2;
    --muted: #9b9caa;
    --line: #262630;
    --link: #7c86ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 620px; margin: 0 auto; padding: 40px 20px 56px; }
a { color: var(--link); text-underline-offset: 3px; }
.top { display: flex; align-items: center; gap: 14px; margin-bottom: 4px; }
.top img { width: 72px; height: 72px; transform: rotate(-6deg); }
h1 { font-size: 2.3rem; line-height: 1.1; margin: 0; letter-spacing: -0.02em; }
h2 { font-size: 1.05rem; margin: 30px 0 6px; }
p { margin: 0 0 14px; }
.sub { font-size: 1.12rem; color: var(--muted); margin: 10px 0 24px; }
ul { padding-left: 20px; margin: 0 0 16px; }
li { margin-bottom: 6px; }
kbd { font: 0.9em ui-monospace, Menlo, monospace; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px; padding: 1px 5px; }
.q { font-weight: 600; margin-bottom: 2px; }
.note { color: var(--muted); font-size: 0.92rem; }
footer { max-width: 620px; margin: 0 auto; padding: 16px 20px 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.92rem; }
footer a { color: inherit; margin-right: 14px; }