:root {
  --bg: #121513;
  --panel: #1a1e1b;
  --ink: #e6e9e6;
  --muted: #9aa49e;
  --rule: #2b312d;
  --accent: #8fbf9f;
}
:root[data-theme="light"] {
  --bg: #f6f7f5;
  --panel: #ffffff;
  --ink: #1b201d;
  --muted: #5a645f;
  --rule: #d9ddd9;
  --accent: #2f6b45;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f7f5;
    --panel: #ffffff;
    --ink: #1b201d;
    --muted: #5a645f;
    --rule: #d9ddd9;
    --accent: #2f6b45;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 56px 16px 72px; }
header { margin-bottom: 40px; }
.name { font-size: 15px; letter-spacing: 0.04em; color: var(--muted); margin: 0 0 28px; }
.name a { color: inherit; text-decoration: none; }
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 16px; font-weight: 650; }
h2 { font-size: 20px; margin: 36px 0 8px; font-weight: 650; }
p, li { color: var(--ink); }
.lead { font-size: 19px; color: var(--muted); margin: 0; }
a { color: var(--accent); }
ul { padding-left: 20px; }
.card { background: var(--panel); border: 1px solid var(--rule); border-radius: 8px; padding: 20px 22px; margin: 28px 0; }
.card p { margin: 4px 0; }
footer { border-top: 1px solid var(--rule); margin-top: 56px; padding-top: 18px; font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); }
.small { font-size: 14px; color: var(--muted); }

/* Top ribbon: the site navigation will grow from here. */
.ribbon { background: var(--panel); border-bottom: 1px solid var(--rule); position: sticky; top: 0; z-index: 10 }
.ribbon-in { max-width: 720px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px }
.ribbon .brand { color: var(--ink); text-decoration: none; font-weight: 650; font-size: 15px; letter-spacing: 0.02em }
.navbtn { color: var(--ink); text-decoration: none; font-size: 14px; padding: 6px 14px; border: 1px solid var(--rule); border-radius: 999px }
.navbtn:hover { border-color: var(--accent); color: var(--accent) }
.navbtn[aria-current="page"] { border-color: var(--accent); color: var(--accent) }
main { padding-top: 40px }