/* Archivo's ampersand reads as "Ɛ"; draw "&" with the system sans. */
@font-face {
  font-family: "RL Amp";
  src: local("Helvetica Neue"), local("HelveticaNeue"), local("Arial"), local("Roboto");
  unicode-range: U+0026;
}
:root {
  --bg: #0b0b0b;
  --card: #161616;
  --text: #f4f4f4;
  --muted: #a3a3a3;
  --faint: #6b6b6b;
  --line: rgba(255, 255, 255, 0.09);
  --amber: #f2b84b;
  --link: #f2b84b;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #fafafa;
    --card: #ffffff;
    --text: #111111;
    --muted: #555555;
    --faint: #8a8a8a;
    --line: rgba(0, 0, 0, 0.1);
    --link: #a86d00;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "RL Amp", "Archivo", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 28px 16px 64px; }
header.top { display: flex; align-items: center; gap: 10px; margin-bottom: 36px; }
header.top a { color: var(--text); text-decoration: none; display: flex; align-items: center; gap: 10px; }
.mark { width: 28px; height: 28px; border-radius: 7px; display: block; box-shadow: 0 0 0 1px var(--line); }
.brand { font-weight: 800; font-size: 20px; letter-spacing: -0.02em; }
h1 { font-size: 34px; line-height: 1.15; letter-spacing: -0.03em; margin: 0 0 8px; font-weight: 800; }
h2 { font-size: 20px; letter-spacing: -0.01em; margin: 36px 0 8px; font-weight: 700; }
h3 { font-size: 16px; margin: 22px 0 4px; font-weight: 700; }
p, li { color: var(--muted); }
strong { color: var(--text); font-weight: 600; }
a { color: var(--link); }
ul { padding-left: 20px; }
li { margin: 4px 0; }
.meta { color: var(--faint); font-size: 14px; margin-bottom: 28px; }
.summary { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 6px 20px; margin: 24px 0; }
.summary li { margin: 8px 0; }
.toc { font-size: 14px; columns: 2; column-gap: 24px; padding-left: 18px; }
@media (max-width: 520px) { .toc { columns: 1; } h1 { font-size: 28px; } }
footer { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--faint); font-size: 14px; display: flex; flex-wrap: wrap; gap: 8px 20px; }
footer a { color: var(--muted); text-decoration: none; }
.cards { display: grid; gap: 12px; margin-top: 28px; }
.card { display: block; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 18px 20px; color: var(--text); text-decoration: none; }
.card span { display: block; color: var(--muted); font-size: 14px; margin-top: 2px; }
.card b { font-weight: 700; }
.lead { font-size: 18px; color: var(--muted); margin: 0; }