:root {
  --paper: #f7f6f2;
  --ink: #16181d;
  --muted: #5d636e;
  --line: #e4e2db;
  --blue: #1a6beb;
  --green: #0a9488;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #121417;
    --ink: #f2f3f5;
    --muted: #a6acb6;
    --line: #2a2e35;
    --blue: #5b9bff;
    --green: #3fd0b0;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans TC',
    'PingFang TC', sans-serif;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 20px 72px;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

header img {
  width: 72px;
  height: 72px;
  border-radius: 18px;
}

h1 {
  font-size: 28px;
  line-height: 1.2;
  margin: 0;
}

h2 {
  font-size: 20px;
  margin: 36px 0 8px;
}

h3 {
  font-size: 17px;
  margin: 24px 0 4px;
}

p,
li {
  color: var(--ink);
}

.muted {
  color: var(--muted);
  font-size: 15px;
}

a {
  color: var(--blue);
}

ul {
  padding-left: 20px;
}

nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
  font-size: 15px;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 48px 0 0;
}

footer {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}