:root {
  --ink: #1c1d21; --muted: #5d6170; --faint: #9a9eab; --line: #e3e5ea;
  --bg: #ffffff; --panel: #f6f7f9; --accent: #e8553d;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f2f3f5; --muted: #a9adb9; --faint: #6f7380; --line: #2c2e35;
    --bg: #111214; --panel: #1c1d21; --accent: #f06a52;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 40px 20px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
header img { width: 44px; height: 44px; border-radius: 10px; }
header a { color: var(--ink); text-decoration: none; font-weight: 800; font-size: 20px; letter-spacing: -0.3px; }
h1 { font-size: 34px; line-height: 1.15; letter-spacing: -0.5px; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { color: var(--ink); }
.lede { color: var(--muted); font-size: 19px; }
.muted { color: var(--muted); }
a { color: var(--accent); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
.card { background: var(--panel); border-radius: 14px; padding: 16px 18px; margin: 16px 0; }
.card p { margin: 0; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--faint); font-size: 14px; }
footer a { color: var(--muted); margin-right: 14px; }