:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #5f6368;
  --line: #e3e3e6;
  --accent: #1f5f8b;
  --panel: #f6f7f9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141517;
    --text: #e8e8ea;
    --muted: #a0a4aa;
    --line: #2d2f33;
    --accent: #7db7e0;
    --panel: #1c1e21;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

header, main, footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px;
}

header {
  padding-top: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

header .brand {
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}

header nav {
  margin-top: 6px;
  font-size: 15px;
}

header nav a { margin-right: 16px; }

main { padding-top: 8px; padding-bottom: 40px; }

h1 { font-size: 1.9rem; line-height: 1.25; margin: 28px 0 6px; }
h2 { font-size: 1.25rem; margin: 34px 0 8px; }
h3 { font-size: 1.05rem; margin: 22px 0 6px; }

p, li { overflow-wrap: anywhere; }
ul, ol { padding-left: 1.3em; }
li { margin: 4px 0; }

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

.meta { color: var(--muted); margin-top: 0; }

.box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 18px;
  margin: 20px 0;
}

.box p:first-child { margin-top: 0; }
.box p:last-child { margin-bottom: 0; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
}

footer {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  padding-bottom: 32px;
  color: var(--muted);
  font-size: 14px;
}