:root {
  color-scheme: light;
  --ink: #202322;
  --muted: #626966;
  --line: #dde2df;
  --paper: #f7f8f6;
  --surface: #ffffff;
  --accent: #db3b2f;
  --accent-soft: #fff0ed;
  --green: #17745a;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

main {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 24px 20px 52px;
}

h1, h2 { line-height: 1.25; letter-spacing: 0; }
h1 { margin: 0 0 8px; font-size: 28px; }
h2 { margin: 34px 0 10px; font-size: 20px; scroll-margin-top: 18px; }
p { margin: 0 0 14px; }
ul { margin: 8px 0 16px; padding-left: 22px; }
li { margin: 6px 0; }
a { color: var(--green); }

.meta {
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 14px;
}

.contents {
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
}

.contents strong { display: block; margin-bottom: 6px; }
.contents a { display: block; padding: 3px 0; text-decoration: none; }
.notice {
  margin-top: 30px;
  padding: 16px 18px;
  color: #7e2a23;
  background: var(--accent-soft);
  border-radius: 6px;
}