:root {
  --paper: #f4f3ef;
  --ink: #1f2430;
  --sub: #6b7280;
  --accent: #2f6fde;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.8;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 16px 24px;
}
h1 { font-size: 1.9rem; line-height: 1.3; margin: 0 0 16px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; padding-left: 10px; border-left: 4px solid var(--accent); }
.lead { font-size: 1.1rem; }
.meta { color: var(--sub); font-size: 0.9rem; }
a { color: var(--accent); }
footer { max-width: 720px; margin: 0 auto; padding: 24px 16px 48px; color: var(--sub); font-size: 0.85rem; }