:root {
  color-scheme: light dark;
  --ink: #183247;
  --muted: #496579;
  --link: #176ca4;
  --bg: #ffffff;
  --surface: #f4f7f9;
  --line: #d9e3ea;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e4edf3;
    --muted: #a3b6c4;
    --link: #7cc0ec;
    --bg: #0f1a22;
    --surface: #16242e;
    --line: #28394a;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; 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;
}

a { color: var(--link); text-underline-offset: 0.15em; }
a:focus-visible { outline: 3px solid var(--link); outline-offset: 2px; border-radius: 2px; }

.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; z-index: 1; padding: 6px 10px; background: var(--bg); }

.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
}
.brand img { display: block; width: 28px; height: 28px; }

.site-nav { display: flex; gap: 20px; }
.site-nav a { color: var(--muted); font-size: 16px; text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; }

main.wrap { padding-top: 40px; padding-bottom: 56px; }

h1 { margin: 0 0 12px; font-size: clamp(28px, 5vw, 38px); line-height: 1.15; letter-spacing: -0.01em; }
h2 { margin: 36px 0 8px; font-size: 21px; line-height: 1.3; }
h3 { margin: 0 0 6px; font-size: 19px; line-height: 1.3; }
p, ul { margin: 0 0 14px; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }
code { font-size: 0.92em; }

.lead { margin-bottom: 24px; color: var(--muted); font-size: 19px; }
.meta { color: var(--muted); font-size: 15px; }

.card {
  margin: 16px 0;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.badge {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0; }

.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 15px; }
.site-footer .wrap { padding-top: 20px; padding-bottom: 32px; }
.site-footer p { margin: 0 0 6px; }

@media (max-width: 480px) {
  body { font-size: 16px; }
  main.wrap { padding-top: 28px; }
  .card { padding: 16px 18px; }
}