:root {
  --bg: #f4f9fd;
  --paper: #ffffff;
  --ink: #2b2118;
  --muted: #6b5d50;
  --accent: #2f6fd0;
  --line: #dfe8f0;
  --summary: #fff4dc;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11161c; --paper: #1a2129; --ink: #ebe4dc; --muted: #a99b8e; --accent: #7fb2ff; --line: #2a3440; --summary: #2b2416; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
header, footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 18px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
footer { color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); margin-top: 32px; }
.home { font-weight: 700; font-size: 19px; color: var(--ink); text-decoration: none; }
a { color: var(--accent); }
main { max-width: 760px; margin: 0 auto; padding: 0 16px; }
article {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 8px 24px 20px;
  margin: 16px 0 28px;
}
h1 { font-size: 30px; margin: 18px 0 4px; }
h2 { font-size: 19px; margin: 26px 0 6px; }
.meta { color: var(--muted); margin-top: 0; font-size: 15px; }
.summary { background: var(--summary); border-radius: 10px; padding: 12px 16px; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
.landing { text-align: center; padding-top: 24px; }
.landing p { max-width: 560px; margin: 10px auto; }
.hero { width: min(320px, 70vw); height: auto; }
.links { list-style: none; padding: 0; margin-top: 24px; }
@media (max-width: 520px) {
  article { padding: 4px 16px 16px; }
  h1 { font-size: 26px; }
}