:root {
  --ink: #22201f;
  --muted: #6f6964;
  --paper: #fffdfb;
  --soft: #f6f1ed;
  --line: #dfd5cd;
  --gold: #a88752;
  --gold-dark: #725a34;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans JP", "Yu Gothic", sans-serif;
  line-height: 1.85;
}
a { color: inherit; }
img { max-width: 100%; height: auto; }

.draft-note {
  margin: 0;
  padding: 8px 20px;
  color: #fff;
  background: #6e6259;
  text-align: center;
  font-size: 13px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 82px;
  padding: 10px clamp(22px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 251, .96);
}
.site-header img { width: 150px; display: block; }
.site-nav { display: flex; flex-wrap: wrap; gap: 8px 26px; align-items: center; }
.site-nav a { text-decoration: none; font-size: 14px; letter-spacing: .08em; }
.site-nav .active { color: var(--gold-dark); font-weight: 700; border-bottom: 1px solid var(--gold); }

.hero {
  padding: clamp(72px, 10vw, 128px) 24px;
  text-align: center;
  background: linear-gradient(135deg, #f4ece8, #fffdfb 48%, #eee4dc);
}
.eyebrow { margin: 0 0 12px; color: var(--gold-dark); font: 700 13px/1.3 "Noto Sans JP", sans-serif; letter-spacing: .16em; text-transform: uppercase; }
.hero h1 { margin: 0; font-family: "Zen Old Mincho", "Yu Mincho", serif; font-size: clamp(30px, 5vw, 52px); font-weight: 500; letter-spacing: .06em; }
.lead { max-width: 760px; margin: 26px auto 0; color: var(--muted); font-size: clamp(15px, 2vw, 18px); }

.container { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: clamp(64px, 8vw, 104px) 0; }
.section.soft { background: var(--soft); }
.section-title { margin: 0 0 14px; text-align: center; font-family: "Zen Old Mincho", "Yu Mincho", serif; font-size: clamp(26px, 4vw, 39px); font-weight: 500; }
.section-intro { max-width: 720px; margin: 0 auto 42px; color: var(--muted); text-align: center; }

.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.guide-card {
  display: flex;
  flex-direction: column;
  min-height: 330px;
  padding: 34px 30px;
  border: 1px solid var(--line);
  background: #fff;
  text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease;
}
.guide-card:hover, .guide-card:focus-visible { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(61, 45, 33, .10); }
.guide-card .number { color: var(--gold); font-family: Georgia, serif; font-size: 14px; letter-spacing: .12em; }
.guide-card h2, .guide-card h3 { margin: 42px 0 14px; font-family: "Zen Old Mincho", "Yu Mincho", serif; font-size: 23px; font-weight: 500; line-height: 1.55; }
.guide-card p { margin: 0; color: var(--muted); font-size: 14px; }
.guide-card .more { margin-top: auto; padding-top: 24px; color: var(--gold-dark); font-weight: 700; font-size: 14px; }

.breadcrumb { padding: 16px 0; color: var(--muted); font-size: 12px; }
.breadcrumb a { text-decoration: none; }
.article { width: min(820px, calc(100% - 40px)); margin: 0 auto; padding: 58px 0 96px; }
.answer-first { margin: 0 0 46px; padding: 26px 28px; border-left: 3px solid var(--gold); background: var(--soft); }
.answer-first strong { display: block; margin-bottom: 7px; color: var(--gold-dark); }
.faq-list { display: grid; gap: 14px; }
.faq-list details { border: 1px solid var(--line); background: #fff; }
.faq-list summary { position: relative; cursor: pointer; padding: 22px 58px 22px 24px; font-weight: 700; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 24px; top: 17px; color: var(--gold); font: 400 28px/1 Georgia, serif; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list .answer { padding: 0 24px 24px; color: #4f4a46; }
.faq-list .answer p { margin: 0 0 12px; }

.related { margin-top: 64px; padding-top: 36px; border-top: 1px solid var(--line); }
.related h2 { font-family: "Zen Old Mincho", "Yu Mincho", serif; font-size: 25px; font-weight: 500; }
.related-links { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.related-links a { padding: 16px 18px; border: 1px solid var(--line); background: #fff; text-decoration: none; }

.cta { padding: 66px 24px; color: #fff; background: #2c2927; text-align: center; }
.cta h2 { margin: 0 0 14px; font-family: "Zen Old Mincho", "Yu Mincho", serif; font-size: clamp(25px, 4vw, 36px); font-weight: 500; }
.cta p { max-width: 670px; margin: 0 auto 27px; color: #ded7d0; }
.button-row { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }
.button { display: inline-block; min-width: 230px; padding: 14px 22px; border: 1px solid var(--gold); color: #fff; text-decoration: none; }
.button.primary { color: #251f18; background: #d7bd91; }
.footer { padding: 34px 20px; color: var(--muted); background: #f5f1ee; text-align: center; font-size: 12px; }

.home-hero img { display: block; width: 100%; }
.home-guide-preview { padding: clamp(70px, 8vw, 100px) 0; background: linear-gradient(#fffdfb, #f7f2ee); }
.inline-guide { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 34px; padding: 24px 28px; border: 1px solid var(--line); background: #fff; }
.inline-guide p { margin: 0; }
.inline-guide a { flex: 0 0 auto; color: var(--gold-dark); font-weight: 700; text-decoration: none; }

@media (max-width: 780px) {
  .site-header { position: static; display: block; padding: 14px 20px; text-align: center; }
  .site-header img { margin: auto; }
  .site-nav { justify-content: center; gap: 8px 16px; margin-top: 10px; }
  .site-nav a { font-size: 12px; }
  .hero { padding: 54px 20px; }
  .hero h1 { font-size: 27px; line-height: 1.55; }
  .lead { margin-top: 18px; }
  .guide-grid { grid-template-columns: 1fr; }
  .guide-card { min-height: 260px; }
  .guide-card h2, .guide-card h3 { margin-top: 26px; }
  .related-links { grid-template-columns: 1fr; }
  .inline-guide { display: block; }
  .inline-guide a { display: inline-block; margin-top: 14px; }
}