:root {
  --teal: #00A19A;
  --teal-deep: #007F79;
  --ink: #10201F;
  --muted: #4F6361;
  --bg: #FFFFFF;
  --soft: #EEF8F7;
  --line: #D8E9E7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #E8F3F2;
    --muted: #A3B8B6;
    --bg: #0E1716;
    --soft: #13211F;
    --line: #22332F;
    --teal-deep: #3CC4BC;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Nunito", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal-deep); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding: 22px 0; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand img { width: 36px; height: 36px; display: block; }
.word { font-family: "Baloo 2", "Nunito", system-ui, sans-serif; font-weight: 800; font-size: 24px; line-height: 1; padding-top: 4px; }
main { padding: 40px 0 56px; }
h1 { font-family: "Baloo 2", "Nunito", system-ui, sans-serif; font-weight: 800; font-size: clamp(2.1rem, 5vw, 2.8rem); line-height: 1.1; margin: 0 0 8px; }
.meta { color: var(--muted); margin: 0 0 28px; font-size: 15px; }
h2 { font-family: "Baloo 2", "Nunito", system-ui, sans-serif; font-weight: 800; font-size: 1.5rem; line-height: 1.2; margin: 36px 0 8px; }
h3 { font-size: 1.05rem; font-weight: 800; margin: 22px 0 6px; }
p, li { margin: 0 0 12px; }
ul, ol { padding-left: 22px; margin: 0 0 14px; }
.callout {
  background: var(--soft); border: 1px solid var(--line); border-radius: 14px;
  padding: 18px 20px; margin: 0 0 24px;
}
.callout p:last-child, .callout ul:last-child, .callout ol:last-child { margin-bottom: 0; }
.toc { font-size: 15.5px; }
.toc a { text-decoration: none; }
footer { border-top: 1px solid var(--line); padding: 26px 0 40px; color: var(--muted); font-size: 14px; }
footer p { margin: 4px 0; }
footer nav a { margin-right: 14px; }
footer strong { color: var(--ink); font-weight: 700; }