:root {
  --bg: #fff; --ink: #1d1f24; --muted: #6b6f78; --line: #e2e2dc; --accent: #0e7c86; --link: #2a4fb8; --soft: #fbfbf8;
  --sans: -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); line-height: 1.85; }
a { color: var(--link); }
.top { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.logo { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; text-decoration: none; color: var(--ink); }
.logo .thin { font-weight: 300; }
.logo .mark { width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--accent); position: relative; }
.logo .mark::after { content: ""; position: absolute; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); top: -4px; right: -1px; box-shadow: 0 0 0 2px var(--bg); }
.doc { max-width: 720px; margin: 0 auto; padding: 20px 16px 40px; }
.doc h1 { font-size: 1.6rem; line-height: 1.4; margin: 12px 0 18px; }
.doc h2 { font-size: 1.2rem; margin: 34px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.doc h3 { font-size: 1.02rem; margin: 22px 0 6px; }
.doc p, .doc li { font-size: 1rem; }
.doc .lead { color: #3a3d44; }
.soft { margin: 0; font-size: .8rem; color: #8a6d00; }
.go { text-align: center; margin: 40px 0 0; }
.btn { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; padding: 12px 24px; border-radius: 999px; font-weight: 600; }
.foot { border-top: 1px solid var(--line); padding: 18px 16px 30px; text-align: center; font-size: .8rem; color: var(--muted); }
.foot nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 16px; margin-bottom: 8px; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a[aria-current] { color: var(--ink); }
.foot a:hover { text-decoration: underline; }
dl.qa dt { font-weight: 700; margin-top: 22px; }
dl.qa dd { margin: 6px 0 0; }
.cards { list-style: none; padding: 0; display: grid; gap: 12px; }
.cards a { display: block; border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; text-decoration: none; color: var(--ink); background: var(--soft); }
.cards a:hover { border-color: var(--accent); }
.cards .who { font-weight: 700; }
.cards .first { color: var(--muted); font-size: .9rem; display: block; margin-top: 4px; }
.input { background: var(--soft); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; font-size: .92rem; }
.paper { border-top: 2px solid var(--ink); margin-top: 26px; padding-top: 4px; }
.paper .meta { font-size: .8rem; color: var(--muted); margin: 10px 0 0; }
.paper h2 { border: 0; margin: 2px 0 8px; padding: 0; font-size: 1.15rem; line-height: 1.5; }
.paper .body p { margin: 0 0 .9em; }
.note { font-size: .85rem; color: var(--muted); }
@media (max-width: 560px) { .doc h1 { font-size: 1.35rem; } }