:root {
  --bg: #fafaf7; --fg: #1d1d1b; --muted: #6b6b66; --line: #e4e3dd; --accent: #2f6f4f; --code: #f0efe9;
  --field: #b9d7a1; --road: #8a8a84; --city: #c98a4b;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #161615; --fg: #ecebe6; --muted: #9a9a93; --line: #2c2c2a; --accent: #6fbf94; --code: #1f1f1d;
          --field: #4d6b3c; --road: #b0b0a8; --city: #b5743a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding: 28px 0; display: flex; justify-content: space-between; align-items: center; }
header a { color: var(--fg); text-decoration: none; }
.logo { font-weight: 650; letter-spacing: -.01em; display: flex; gap: 10px; align-items: center; }
nav a { margin-left: 22px; color: var(--muted); font-size: 15px; }
nav a:hover, nav a.on { color: var(--fg); }
.hero { padding: 64px 0 40px; }
h1 { font-size: 44px; line-height: 1.1; margin: 0 0 16px; letter-spacing: -.02em; }
.page h1 { font-size: 34px; }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 28px; max-width: 560px; }
.btns { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 8px; border: 1px solid var(--line); color: var(--fg); text-decoration: none; font-weight: 550; background: none; font: inherit; cursor: pointer; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.meta { margin-top: 18px; font-size: 14px; color: var(--muted); }
section { padding: 36px 0; border-top: 1px solid var(--line); }
h2 { font-size: 22px; margin: 0 0 12px; }
h3 { font-size: 17px; margin: 0 0 6px; }
pre { background: var(--code); padding: 16px 18px; border-radius: 8px; overflow-x: auto; font: 14px/1.55 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; }
code { font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; font-size: .92em; }
p code, li code, td code { background: var(--code); padding: 1px 6px; border-radius: 4px; }
a { color: var(--accent); }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid3 h3 { font-size: 16px; }
.grid3 p { margin: 0; color: var(--muted); font-size: 15px; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
td, th { padding: 8px 0; border-bottom: 1px solid var(--line); vertical-align: top; text-align: left; }
th { font-weight: 600; color: var(--muted); font-size: 14px; }
.api td:first-child { width: 42%; padding-right: 16px; }
.rel td { padding-right: 14px; }
.rel td:last-child { padding-right: 0; }
.sha { font-size: 12px; color: var(--muted); word-break: break-all; }
ul.log { padding-left: 18px; margin: 0; }
ul.log li { margin-bottom: 6px; }
.card { border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; margin-bottom: 16px; }
.card p { margin: 4px 0 12px; color: var(--muted); font-size: 15px; }
.demo { display: grid; grid-template-columns: 1fr 160px; gap: 20px; align-items: start; }
.board { width: 100%; aspect-ratio: 1 / 1; border: 1px solid var(--line); border-radius: 10px; background: var(--code); touch-action: manipulation; }
.side p { margin: 0 0 10px; font-size: 14px; color: var(--muted); }
.side .btn { width: 100%; margin-bottom: 8px; text-align: center; }
.spot { fill: var(--accent); opacity: .18; cursor: pointer; }
.spot:hover { opacity: .4; }
footer { padding: 36px 0 48px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }
@media (max-width: 640px) {
  h1 { font-size: 34px; } .grid3 { grid-template-columns: 1fr; } nav a { margin-left: 14px; }
  .demo { grid-template-columns: 1fr; }
  .rel .hide-m { display: none; }
}