:root {
  --bg: #FFFFFF;
  --card: #F7F7F5;
  --text: #16161A;
  --muted: #5C5C66;
  --rule: #E3E3DF;
  --accent: #4F46E5;
  --flag-bg: #FFF4E5;
  --flag-rule: #E8A33D;
  --flag-text: #7A4E07;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111114;
    --card: #1A1A1F;
    --text: #F2F2F4;
    --muted: #A2A2AD;
    --rule: #2C2C33;
    --accent: #A5A0FF;
    --flag-bg: #2A2112;
    --flag-rule: #8A6520;
    --flag-text: #F0C987;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #111114;
  --card: #1A1A1F;
  --text: #F2F2F4;
  --muted: #A2A2AD;
  --rule: #2C2C33;
  --accent: #A5A0FF;
  --flag-bg: #2A2112;
  --flag-rule: #8A6520;
  --flag-text: #F0C987;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding-block: 48px 96px;
  padding-inline: 20px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main { max-width: 44rem; margin: 0 auto; }

h1 {
  font-size: clamp(1.9rem, 5vw, 2.5rem);
  line-height: 1.15;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h2 {
  font-size: 1.3rem;
  margin: 48px 0 12px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h3 { font-size: 1.02rem; margin: 28px 0 8px; }

p, li { color: var(--text); }
p { margin: 0 0 14px; }

.lede { color: var(--muted); font-size: 1.05rem; margin-bottom: 4px; }
.updated { color: var(--muted); font-size: 0.9rem; margin: 0 0 8px; }

ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 8px; }

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

strong { font-weight: 650; }

.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 0 0 20px;
}
.card > :last-child { margin-bottom: 0; }

.flag {
  background: var(--flag-bg);
  border-left: 3px solid var(--flag-rule);
  border-radius: 0 8px 8px 0;
  padding: 14px 18px;
  margin: 0 0 24px;
  color: var(--flag-text);
}
.flag > :last-child { margin-bottom: 0; }
.flag strong { color: var(--flag-text); }

.toc { font-size: 0.95rem; }
.toc ol { padding-left: 20px; }
.toc li { margin-bottom: 4px; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 20px;
  font-size: 0.94rem;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 10px 12px 10px 0;
  border-bottom: 1px solid var(--rule);
}
th { font-weight: 650; }
.scroll { overflow-x: auto; }

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}