:root {
  --bg: #ffffff;
  --paper: #f6f7f4;
  --panel: #ffffff;
  --text: #1f2528;
  --muted: #667078;
  --line: #d9dfd9;
  --accent: #28635b;
  --accent-2: #6a5734;
  --accent-soft: #edf6f2;
  --warn-soft: #fff8e8;
  --warn-line: #e5c56b;
  --shadow: 0 14px 32px rgba(31, 37, 40, 0.08);
}

* { box-sizing: border-box; }
html { overflow-x: hidden; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.8;
  overflow-x: hidden;
}
a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}
.logo-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--accent-soft);
  color: #17433d;
  font-size: 15px;
  letter-spacing: 0;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 16px;
  font-size: 14px;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
}
main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 34px 0 60px;
}
.article-page { max-width: 960px; }
.hero { padding: 14px 0 26px; }
.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-2);
  font-size: 14px;
  font-weight: 700;
}
h1 {
  max-width: 900px;
  margin: 0 0 16px;
  font-size: clamp(30px, 4.5vw, 50px);
  line-height: 1.18;
  letter-spacing: 0;
}
.lead {
  max-width: 850px;
  margin: 0 0 18px;
  color: #384250;
  font-size: 18px;
}
.notice {
  max-width: 920px;
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px solid var(--warn-line);
  border-radius: 8px;
  background: var(--warn-soft);
  color: #5f4b19;
  font-size: 14px;
}
.home-routes, .related, .guide-links, .faq { margin-top: 32px; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.card-grid.small { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.route-card, .mini-card, .content-card, details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.route-card, .mini-card {
  display: block;
  min-width: 0;
  padding: 18px;
  color: var(--text);
  text-decoration: none;
}
.route-card strong, .route-card span, .mini-card span { display: block; }
.route-card strong {
  margin-bottom: 6px;
  font-size: 18px;
}
.route-card span, .mini-card span {
  color: var(--muted);
  font-size: 15px;
}
.content-blocks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}
.content-card { padding: 22px; }
h2 {
  margin: 0 0 10px;
  font-size: 24px;
  line-height: 1.35;
  letter-spacing: 0;
}
.content-card p, details p { margin: 0; }
.guide-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.guide-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  text-decoration: none;
}
details {
  margin: 10px 0;
  padding: 14px 16px;
}
summary {
  cursor: pointer;
  font-weight: 700;
}
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper);
}
.footer-inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 34px;
  color: var(--muted);
  font-size: 14px;
}
.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 12px;
}
.footer-inner a { color: var(--accent); }

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }
  .site-nav { justify-content: flex-start; }
  main { padding-top: 26px; }
  h1 { font-size: 31px; }
  .lead { font-size: 16px; }
  .card-grid, .card-grid.small, .content-blocks {
    grid-template-columns: 1fr;
  }
  .content-card, .route-card, .mini-card { padding: 16px; }
}