:root {
  color-scheme: light dark;
  --fg: #22302a;
  --muted: #5d6b64;
  --bg: #f6f5ef;
  --card: #fffdf8;
  --accent: #2f6b52;
  --accent-soft: #e3eee7;
  --line: #ddd9cc;
  --note-bg: #fbf3e2;
  --note-line: #e5cf9f;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e5ebe7;
    --muted: #9eaaa4;
    --bg: #151a17;
    --card: #1c221f;
    --accent: #84c7a1;
    --accent-soft: #233229;
    --line: #2f3833;
    --note-bg: #2a2518;
    --note-line: #5d5032;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.02em;
}
a { color: var(--accent); text-underline-offset: 3px; }
.site-header, .site-footer, main { max-width: 680px; margin: 0 auto; padding: 0 16px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 20px; padding-bottom: 8px; }
.brand { font-weight: 700; font-size: 1.05rem; color: var(--fg); text-decoration: none; letter-spacing: 0.06em; }
.brand span { display: inline-block; margin-left: 4px; padding: 0 8px; border-radius: 6px; background: var(--accent-soft); color: var(--accent); }
.site-header nav { display: flex; gap: 14px; flex-wrap: wrap; font-size: 0.9rem; }
.site-header nav a { color: var(--muted); text-decoration: none; }
main { padding-top: 16px; padding-bottom: 48px; }
h1 { font-size: 1.6rem; line-height: 1.5; margin: 16px 0 8px; letter-spacing: 0.04em; }
h2 { font-size: 1.15rem; margin: 40px 0 8px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
h3 { font-size: 1rem; margin: 24px 0 4px; }
p, li { overflow-wrap: anywhere; }
ul, ol { padding-left: 1.4em; }
li + li { margin-top: 4px; }
.lead { font-size: 1.05rem; color: var(--muted); }
.hero { padding: 32px 0 8px; }
.hero h1 { font-size: 1.9rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin: 24px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.card h3 { margin-top: 0; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.notice { background: var(--note-bg); border: 1px solid var(--note-line); border-radius: 10px; padding: 12px 16px; margin: 20px 0; font-size: 0.95rem; }
.draft { background: var(--note-bg); border-left: 4px solid var(--note-line); padding: 10px 14px; margin: 16px 0; font-size: 0.92rem; }
.meta { color: var(--muted); font-size: 0.9rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.93rem; margin: 12px 0; }
th, td { text-align: left; vertical-align: top; padding: 8px; border-bottom: 1px solid var(--line); }
th { width: 32%; color: var(--muted); font-weight: 600; }
.mail { font-size: 1.15rem; font-weight: 700; }
.site-footer { padding-top: 24px; padding-bottom: 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; }
.site-footer nav { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 8px; }
.site-footer a { color: var(--muted); }