:root {
  --coral: #EB5E3D;
  --coral-deep: #C2401F;
  --ink: #2A2350;
  --muted: #6E6A82;
  --border: #E9E5F1;
  --lav: #F3F0FA;
  --paper: #FFFFFF;
  --bg: #FFFFFF;
  --warn-bg: #FBF0E0;
  --warn-border: #F2A93B;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Segoe UI", Meiryo, sans-serif;
  line-height: 1.9;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}
header.site {
  border-bottom: 1px solid var(--border);
  background: var(--paper);
}
header.site .inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
header.site .brand {
  display: inline-flex;
  align-items: center;
}
header.site .brand img { height: 30px; width: auto; display: block; }
header.site nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  margin-left: 16px;
}
header.site nav a:hover { color: var(--coral); }
h1 {
  font-size: clamp(24px, 5vw, 30px);
  line-height: 1.35;
  margin: 8px 0 4px;
  letter-spacing: -.01em;
}
.updated {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 28px;
}
h2 {
  font-size: 19px;
  margin: 40px 0 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
h2:first-of-type { border-top: 0; }
h3 { font-size: 16px; margin: 24px 0 6px; }
p, li { color: var(--ink); }
ol, ul { padding-left: 1.4em; }
li { margin: 4px 0; }
a { color: var(--coral-deep); }
strong { font-weight: 700; }
.ph { /* placeholder highlight */
  background: var(--lav);
  border-radius: 4px;
  padding: 0 4px;
  color: var(--muted);
  font-size: .92em;
}
.notice {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 14px;
  margin: 20px 0 28px;
  color: var(--ink);
}
.notice strong { color: var(--coral-deep); }
.table-wrap { overflow-x: auto; margin: 16px 0; }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; min-width: 480px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--lav); font-weight: 700; white-space: nowrap; }
footer.site {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  padding: 28px 20px 48px;
}
footer.site a { color: var(--muted); margin: 0 8px; }
/* index cards */
.cards { display: grid; gap: 14px; margin-top: 28px; }
.card {
  display: block;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  text-decoration: none;
  color: var(--ink);
  transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--coral); transform: translateY(-1px); }
.card .t { font-weight: 700; font-size: 16px; }
.card .d { color: var(--muted); font-size: 14px; margin-top: 4px; }
.lead { color: var(--muted); font-size: 15px; }