:root {
  --bg: #f6f5f1;
  --ink: #141a1f;
  --muted: #5b6670;
  --line: #d9d6cd;
  --accent: #0f7a5a;
  --accent-ink: #ffffff;
  --accent-soft: #dcefe6;
  --card: #ffffff;
  --soft: #eeece6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1418;
    --ink: #eef1f2;
    --muted: #96a2ab;
    --line: #263039;
    --accent: #7fd4b4;
    --accent-ink: #0f1418;
    --accent-soft: #173229;
    --card: #151c21;
    --soft: #1b242a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.7;
}
a { color: inherit; }
.wrap { width: 100%; max-width: 72rem; margin: 0 auto; padding: 0 1.5rem; }
header .wrap { padding-top: 1.25rem; padding-bottom: 1.25rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.mark { font-weight: 650; font-size: 1.2rem; letter-spacing: -0.02em; text-decoration: none; }
.mark span { color: var(--accent); }
header nav { display: flex; align-items: center; gap: 1.25rem; }
header nav a { font-size: 0.92rem; color: var(--muted); text-decoration: none; }
header nav a:hover { color: var(--ink); }
header nav a.cta { color: var(--accent-ink); background: var(--accent); padding: 0.45rem 0.9rem; border-radius: 0.5rem; font-weight: 600; }

article, .index { max-width: 42rem; margin: 0 auto; padding: 2.5rem 1.5rem 4rem; }
.crumb { font-size: 0.85rem; color: var(--muted); margin: 0 0 1.5rem; }
.crumb a { text-decoration: none; }
h1 { font-size: clamp(2rem, 5vw, 2.9rem); line-height: 1.1; letter-spacing: -0.035em; margin: 0 0 1rem; text-wrap: balance; }
.meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 2rem; }
h2 { font-size: 1.5rem; line-height: 1.25; letter-spacing: -0.02em; margin: 2.75rem 0 0.75rem; }
h3 { font-size: 1.15rem; margin: 2rem 0 0.5rem; }
p { margin: 0 0 1.1rem; }
ul, ol { padding-left: 1.3rem; margin: 0 0 1.1rem; }
li { margin: 0.3rem 0; }
code { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 0.9em; background: var(--soft); padding: 0.1rem 0.35rem; border-radius: 0.3rem; }
pre {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 0 0 1.25rem;
}
pre code { background: none; padding: 0; }
.answer {
  background: var(--accent-soft);
  border-radius: 0.9rem;
  padding: 1.25rem 1.5rem;
  margin: 0 0 2rem;
}
.answer strong:first-child { display: block; font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.4rem; }
.answer p:last-child { margin: 0; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 0.8rem; background: var(--card); margin: 0 0 1.25rem; }
table { width: 100%; border-collapse: collapse; min-width: 32rem; font-size: 0.93rem; }
th, td { text-align: left; padding: 0.75rem 1rem; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
thead th { font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.cta-box {
  margin: 3rem 0 0;
  padding: 1.75rem;
  border-radius: 1rem;
  background: var(--card);
  border: 1px solid var(--line);
}
.cta-box h2 { margin-top: 0; font-size: 1.3rem; }
.cta-box a.btn { display: inline-block; margin-top: 0.5rem; background: var(--accent); color: var(--accent-ink); padding: 0.7rem 1.2rem; border-radius: 0.6rem; font-weight: 600; text-decoration: none; }
.sources { font-size: 0.9rem; color: var(--muted); border-top: 1px solid var(--line); margin-top: 3rem; padding-top: 1.25rem; }
.sources h2 { font-size: 1rem; margin: 0 0 0.5rem; color: var(--ink); }
.cards { display: grid; gap: 1rem; margin-top: 2rem; }
.cards a { display: block; text-decoration: none; background: var(--card); border: 1px solid var(--line); border-radius: 0.9rem; padding: 1.25rem 1.5rem; }
.cards a:hover { border-color: var(--accent); }
.cards strong { display: block; font-size: 1.1rem; margin-bottom: 0.3rem; }
.cards span { color: var(--muted); }
footer .wrap { padding-top: 1.75rem; padding-bottom: 2.5rem; font-size: 0.85rem; color: var(--muted); display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; justify-content: space-between; border-top: 1px solid var(--line); }
footer nav { display: flex; gap: 1.5rem; }
@media (max-width: 40rem) { header nav a:not(.cta) { display: none; } }