:root {
  /* カテゴリ別アクセント（各サイトで変更）。デフォルトはブロンズ系 */
  --accent: #e85d8a;
  --accent-dark: #d63a6f;
  --accent-soft: #fdf2f6;
  --accent-grad-start: #f4729d;
  --accent-grad-end: #d63a6f;

  --ink: #111827;
  --ink-soft: #374151;
  --muted: #6b7280;
  --paper: #ffffff;
  --surface: #f9fafb;
  --line: #e5e7eb;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(16,24,40,.05);
  --shadow-md: 0 4px 12px rgba(16,24,40,.07);
  --shadow-lg: 0 12px 32px rgba(16,24,40,.10);
  --container: 1080px;
  --font: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", Meiryo, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: .6rem; text-decoration: none; }
.logo-mark {
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-grad-start), var(--accent-grad-end));
  color: #fff; font-weight: 800; font-size: .9rem; letter-spacing: -.02em;
  box-shadow: var(--shadow-md);
}
.logo-text { font-weight: 800; font-size: 1.05rem; color: var(--ink); letter-spacing: -.02em; }
.site-nav { display: flex; gap: .25rem; }
.site-nav a {
  padding: .45rem .9rem; border-radius: 8px; color: var(--ink-soft);
  text-decoration: none; font-size: .95rem; font-weight: 600; transition: .2s;
}
.site-nav a:hover { background: var(--accent-soft); color: var(--accent-dark); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; }

/* ===== Hero ===== */
.hero {
  background:
    radial-gradient(1200px 400px at 80% -20%, var(--accent-soft), transparent 60%),
    var(--surface);
  border-bottom: 1px solid var(--line);
}
.hero-inner { padding: 4.5rem 1.5rem 3.5rem; max-width: var(--container); margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: .4rem; padding: .3rem .8rem;
  border-radius: 999px; background: var(--accent-soft); color: var(--accent-dark);
  font-size: .8rem; font-weight: 700; margin-bottom: 1.2rem;
}
.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.9rem); line-height: 1.3; letter-spacing: -.02em;
  margin: 0 0 1rem; font-weight: 800;
}
.hero h1 em { font-style: normal; background: linear-gradient(var(--accent-grad-start), var(--accent-grad-end)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 1.15rem; color: var(--ink-soft); max-width: 60ch; margin: 0 0 1.6rem; }
.hero-actions { display: flex; gap: .8rem; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .75rem 1.5rem; border-radius: 10px; font-weight: 700; text-decoration: none;
  font-size: .98rem; transition: .2s; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: linear-gradient(135deg, var(--accent-grad-start), var(--accent-grad-end)); color: #fff; box-shadow: var(--shadow-md); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); filter: brightness(1.05); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-dark); }

/* ===== Main layout ===== */
main { min-height: 60vh; }
.page { padding: 3rem 1.5rem 4rem; max-width: 760px; margin: 0 auto; }
.page-wide { padding: 2.5rem 1.5rem 4rem; max-width: var(--container); margin: 0 auto; }
.page h1 { font-size: clamp(1.7rem, 3.5vw, 2.3rem); line-height: 1.35; letter-spacing: -.01em; margin: 0 0 1rem; }
.page h2 { font-size: 1.4rem; margin: 2.5rem 0 1rem; padding-bottom: .5rem; letter-spacing: -.01em; }
.page h3 { font-size: 1.15rem; margin: 1.8rem 0 .8rem; }

/* ===== Article body ===== */
.article-body p { margin: 1rem 0; }
.article-body ul, .article-body ol { margin: 1rem 0; padding-left: 1.4rem; }
.article-body li { margin: .4rem 0; }
.article-body strong { color: var(--accent-dark); }
.article-body table { width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: .95rem; }
.article-body th, .article-body td { border: 1px solid var(--line); padding: .6rem .8rem; text-align: left; }
.article-body th { background: var(--surface); font-weight: 700; }
.article-body a { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 3px; }

/* ===== Cards ===== */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.25rem; margin: 1.5rem 0; }
.card {
  background: var(--paper); border: 1px solid var(--line); border-radius: 14px;
  padding: 1.3rem 1.4rem; box-shadow: var(--shadow-sm); transition: .22s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.card .card-label { display: inline-block; font-size: .72rem; font-weight: 700; color: var(--accent-dark); background: var(--accent-soft); padding: .15rem .55rem; border-radius: 6px; margin-bottom: .6rem; }
.card h3 { margin: 0 0 .5rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--ink-soft); font-size: .92rem; }
.card a.overlay { text-decoration: none; color: inherit; }

/* ===== Article list ===== */
.article-list { list-style: none; padding: 0; margin: 1.5rem 0; display: grid; gap: 1rem; }
.article-list li {
  background: var(--paper); border: 1px solid var(--line); border-radius: 12px;
  padding: 1.1rem 1.3rem; transition: .2s;
}
.article-list li:hover { box-shadow: var(--shadow-md); border-color: var(--accent); }
.article-list a.title { font-weight: 700; color: var(--ink); text-decoration: none; font-size: 1.05rem; }
.article-list a.title:hover { color: var(--accent-dark); }
.article-list .meta { color: var(--muted); font-size: .82rem; margin-top: .35rem; }

/* ===== FAQ / details ===== */
.faq-list { display: grid; gap: .7rem; margin: 1.5rem 0; }
.faq-list details {
  border: 1px solid var(--line); border-radius: 12px; padding: .9rem 1.1rem;
  background: var(--surface);
}
.faq-list summary { font-weight: 700; cursor: pointer; color: var(--ink-soft); }
.faq-list details[open] summary { margin-bottom: .6rem; color: var(--accent-dark); }

/* ===== Steps ===== */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 1.5rem 0; display: grid; gap: 1rem; }
.steps li {
  counter-increment: step; position: relative; padding: 1rem 1.2rem 1rem 3.2rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
}
.steps li::before {
  content: counter(step); position: absolute; left: 1rem; top: 1.1rem;
  width: 1.6rem; height: 1.6rem; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent-grad-start), var(--accent-grad-end));
  color: #fff; border-radius: 50%; font-weight: 800; font-size: .85rem;
}

/* ===== Info box / CTA ===== */
.cta {
  margin-top: 2.5rem; padding: 1.5rem; border-radius: 14px;
  background: linear-gradient(135deg, var(--accent-soft), #fff);
  border: 1px solid var(--line); color: var(--ink-soft);
}
.cta p { margin: 0; }
.info-table { width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: .95rem; }
.info-table th, .info-table td { border: 1px solid var(--line); padding: .6rem .9rem; text-align: left; vertical-align: top; }
.info-table th { background: var(--surface); white-space: nowrap; font-weight: 700; }
.note { font-size: .85rem; color: var(--muted); }

/* ===== Footer ===== */
.site-footer { background: var(--ink); color: #e5e7eb; margin-top: 4rem; }
.footer-top { display: flex; justify-content: space-between; gap: 2rem; padding: 3rem 0 2rem; flex-wrap: wrap; }
.footer-brand .logo-text { color: #fff; font-weight: 800; }
.footer-desc { color: #9ca3af; font-size: .9rem; max-width: 40ch; }
.footer-nav { display: flex; flex-direction: column; gap: .5rem; }
.footer-nav a { color: #d1d5db; text-decoration: none; font-size: .92rem; }
.footer-nav a:hover { color: #fff; }
.footer-notice { color: #9ca3af; font-size: .8rem; padding: 1.2rem 0; border-top: 1px solid #374151; }
.footer-copy { color: #9ca3af; font-size: .82rem; padding: 0 0 2rem; }

/* ===== Responsive ===== */
@media (max-width: 720px) {
  .site-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; padding: .6rem 1rem; }
  .site-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .footer-top { flex-direction: column; }
}