:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5a5f66;
  --border: #e2e5e9;
  --accent: #9a2c2c;
  --code-bg: #f5f6f8;
  --table-head: #f0f2f5;
  --highlight: #fdf6e3;
  --highlight-border: #d4b483;
  --max: 820px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a;
    --fg: #e6e8eb;
    --muted: #9aa1ab;
    --border: #2c3038;
    --accent: #e06666;
    --code-bg: #1c1f25;
    --table-head: #1c1f25;
    --highlight: #241f14;
    --highlight-border: #5a4a2a;
  }
}
:root[data-theme="dark"] {
  --bg: #14161a;
  --fg: #e6e8eb;
  --muted: #9aa1ab;
  --border: #2c3038;
  --accent: #e06666;
  --code-bg: #1c1f25;
  --table-head: #1c1f25;
  --highlight: #241f14;
  --highlight-border: #5a4a2a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding-block: 2.5rem 4rem;
  padding-inline: 20px;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main { max-width: var(--max); margin: 0 auto; }

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .5rem; letter-spacing: -0.02em; }
h2 { font-size: 1.3rem; margin: 2.75rem 0 .85rem; padding-bottom: .35rem; border-bottom: 1px solid var(--border); letter-spacing: -0.01em; }
h3 { font-size: 1.05rem; margin: 1.75rem 0 .5rem; }
p  { margin: 0 0 1rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.lede    { font-size: 1.1rem; margin-bottom: 1.5rem; }
.authors { color: var(--muted); font-size: .95rem; margin-bottom: .35rem; }
.affil   { color: var(--muted); font-size: .85rem; margin-bottom: 1.5rem; }

.crumb { font-size: .87rem; color: var(--muted); margin-bottom: 1.5rem; }
.crumb a { color: var(--muted); }

.badges { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.75rem; }
.badge {
  display: inline-block; padding: .3rem .7rem; border: 1px solid var(--border);
  border-radius: 999px; font-size: .82rem; color: var(--fg); background: var(--code-bg);
}
.badge.award { background: var(--highlight); border-color: var(--highlight-border); }

table { width: 100%; border-collapse: collapse; margin: 1.25rem 0; font-size: .92rem; }
th, td { text-align: left; padding: .55rem .7rem; border-bottom: 1px solid var(--border); }
th { background: var(--table-head); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.scroll { overflow-x: auto; }

code { background: var(--code-bg); padding: .12em .38em; border-radius: 4px; font-size: .88em; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
pre { background: var(--code-bg); padding: 1rem; border-radius: 8px; overflow-x: auto; border: 1px solid var(--border); }
pre code { background: none; padding: 0; font-size: .82rem; line-height: 1.55; }

blockquote {
  margin: 1.25rem 0; padding: .75rem 1rem; background: var(--code-bg);
  border-left: 3px solid var(--accent); border-radius: 0 6px 6px 0;
}
blockquote p:last-child { margin-bottom: 0; }

figure { margin: 1.75rem 0; }
figure img { max-width: 100%; height: auto; display: block; border: 1px solid var(--border); border-radius: 6px; background: #fff; }
figcaption { font-size: .87rem; color: var(--muted); margin-top: .6rem; line-height: 1.55; }

.faq dt { font-weight: 600; margin-top: 1.4rem; }
.faq dd { margin: .4rem 0 0; }

.tiers { list-style: none; padding: 0; }
.tiers li { padding: .5rem 0; border-bottom: 1px solid var(--border); }
.tiers strong { display: inline-block; min-width: 2.5rem; }

.related { display: grid; gap: .6rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin: 1.25rem 0; }
.related a {
  display: block; padding: .7rem .9rem; border: 1px solid var(--border);
  border-radius: 8px; background: var(--code-bg); color: var(--fg);
}
.related a:hover { border-color: var(--accent); text-decoration: none; }
.related a strong { display: block; color: var(--accent); margin-bottom: .15rem; font-size: .95rem; }
.related a span { font-size: .84rem; color: var(--muted); }

footer { margin-top: 3.5rem; padding-top: 1.25rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .88rem; }