:root {
  color-scheme: light;
  --bg: #fbfcfd;
  --ink: #172026;
  --muted: #53616b;
  --line: #d8e0e7;
  --panel: #ffffff;
  --soft: #eef6f4;
  --accent: #0b6e69;
  --accent-2: #8a4b12;
  --code: #101820;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}
a { color: var(--accent-2); }
header {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #eef7f5 0%, #fbfcfd 100%);
}
.topbar, main, footer {
  max-width: 1180px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 18px;
  padding-bottom: 18px;
}
.brand {
  font-weight: 750;
  color: var(--ink);
  text-decoration: none;
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}
nav a.active {
  color: var(--accent);
  font-weight: 700;
}
.hero {
  padding-top: 42px;
  padding-bottom: 36px;
}
h1 {
  max-width: 920px;
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3.45rem);
  line-height: 1.05;
  letter-spacing: 0;
}
h2 {
  margin: 34px 0 12px;
  font-size: 1.45rem;
  letter-spacing: 0;
}
h3 {
  margin: 24px 0 8px;
  font-size: 1.08rem;
  letter-spacing: 0;
}
p { max-width: 82ch; }
.lead {
  color: var(--muted);
  font-size: 1.08rem;
}
main {
  padding-top: 28px;
  padding-bottom: 56px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}
.panel, .list-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 16px;
}
.list {
  display: grid;
  gap: 10px;
}
.meta {
  color: var(--muted);
  font-size: 0.92rem;
}
.pillrow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 0;
}
.pill {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 9px;
  background: var(--soft);
  color: var(--accent);
  font-size: 0.85rem;
}
pre, code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
pre {
  overflow-x: auto;
  border-radius: 8px;
  padding: 14px;
  color: #f6f8fa;
  background: var(--code);
}
code {
  font-size: 0.92em;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 20px;
}
th, td {
  border: 1px solid var(--line);
  padding: 9px;
  text-align: left;
  vertical-align: top;
}
th { background: #eef2f5; }
.toc {
  padding: 14px 16px;
  border-left: 4px solid var(--accent);
  background: var(--soft);
}
.source-note {
  word-break: break-word;
}
footer {
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 20px;
  padding-bottom: 28px;
}
@media (max-width: 720px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }
  .hero {
    padding-top: 28px;
  }
}