:root {
  color-scheme: light dark;
  --bg: #ffffff; --fg: #14201a; --muted: #5c6b63; --line: #dde5df; --accent: #1f6f4a;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1512; --fg: #e8f0ea; --muted: #9db0a6; --line: #253029; --accent: #6fd39b; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  padding: 24px 20px 64px;
}
main { max-width: 44rem; margin: 0 auto; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 1.12rem; margin: 32px 0 8px; }
p, li { color: var(--fg); }
.lede { color: var(--muted); margin: 0 0 24px; }
a { color: var(--accent); }
nav { margin-bottom: 28px; font-size: 0.92rem; }
nav a { margin-right: 16px; }
ul { padding-left: 20px; }
li { margin: 6px 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; margin: 12px 0; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; }
code { font-size: 0.9em; background: var(--line); padding: 1px 5px; border-radius: 4px; }
.todo { background: #fff4d6; color: #5a4500; padding: 2px 6px; border-radius: 4px; font-weight: 600; }
@media (prefers-color-scheme: dark) { .todo { background: #4a3a00; color: #ffe8a3; } }
.small { font-size: 0.86rem; color: var(--muted); }
.button {
  display: inline-block; margin: 4px 0 8px; padding: 12px 18px;
  background: var(--accent); color: #fff; text-decoration: none;
  border-radius: 10px; font-weight: 600;
}
@media (prefers-color-scheme: dark) { .button { color: #0f1512; } }
.note { border-left: 3px solid var(--accent); padding: 8px 0 8px 14px; color: var(--muted); }
footer { margin-top: 48px; color: var(--muted); font-size: 0.86rem; }