:root {
  --ink: #1c1c1e;
  --ink-soft: #5b5b60;
  --rule: #e3e3e6;
  --page: #ffffff;
  --card: #f7f7f8;
  --accent: #1a2b4c;
  --link: #0a5bd3;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f2f2f4;
    --ink-soft: #a1a1a8;
    --rule: #2e2e33;
    --page: #16161a;
    --card: #1e1e23;
    --accent: #c9d7f2;
    --link: #6fa8ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  padding: 3rem 1.25rem 5rem;
  max-width: 44rem;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

header img {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  flex-shrink: 0;
}

header h1 {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}

header p {
  margin: 0.2rem 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

h2 {
  margin: 2.75rem 0 0.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

h3 {
  margin: 1.75rem 0 0.4rem;
  font-size: 1rem;
}

p, ul { margin: 0.75rem 0; }
ul { padding-left: 1.25rem; }
li { margin: 0.35rem 0; }

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

code {
  background: var(--card);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.9em;
}

.lede {
  font-size: 1.05rem;
  color: var(--ink-soft);
}

.note {
  background: var(--card);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}

.meta {
  color: var(--ink-soft);
  font-size: 0.875rem;
}

.lang {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}

.lang h2 {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
  color: var(--ink-soft);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 0.875rem;
}

footer a { margin-right: 1rem; }