:root {
  --bg: #fffafa;
  --paper: #fff;
  --ink: #342e32;
  --muted: #756b70;
  --line: #eadade;
  --accent: #b66578;
  --accent-dark: #7c3d4c;
  --soft: #f8ecef;
  --mint: #eef5f3;
}
* { box-sizing: border-box; }
html, body { overflow-x: hidden; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif; line-height: 1.85; color: var(--ink); background: var(--bg); }
a { color: var(--accent-dark); text-underline-offset: .18em; }
.site-header { display: flex; justify-content: space-between; align-items: center; gap: 18px; padding: 18px clamp(16px,4vw,48px); background: rgba(255,250,250,.96); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.brand { flex: 0 0 auto; color: var(--ink); text-decoration: none; font-weight: 800; font-size: 1.05rem; }
.global-nav { display: flex; gap: 6px; overflow-x: auto; white-space: nowrap; scrollbar-width: none; }
.global-nav a { display: inline-flex; align-items: center; min-height: 36px; padding: 6px 10px; border-radius: 6px; color: var(--muted); text-decoration: none; font-size: .9rem; }
.global-nav a[aria-current="page"], .global-nav a:hover { background: var(--soft); color: var(--accent-dark); }
main { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; padding: 18px 0 0; color: var(--muted); font-size: .88rem; }
.breadcrumbs a::after { content: "/"; margin-left: 8px; color: #b7a9ad; }
.hero { padding: clamp(34px,8vw,72px) 0 clamp(28px,5vw,48px); border-bottom: 1px solid var(--line); }
.eyebrow { display: inline-block; margin: 0 0 12px; padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); color: var(--accent-dark); font-size: .88rem; }
h1 { max-width: 900px; margin: 0 0 18px; font-size: clamp(2rem,3.8vw,3.2rem); line-height: 1.25; letter-spacing: 0; }
.hero p:last-child { max-width: 860px; margin: 0; color: var(--muted); font-size: 1.05rem; }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: clamp(24px,5vw,48px); padding: 34px 0 56px; align-items: start; }
.article { min-width: 0; }
.content-section { padding: 0 0 28px; margin: 0 0 28px; border-bottom: 1px solid var(--line); }
h2 { margin: 0 0 12px; font-size: 1.35rem; line-height: 1.45; letter-spacing: 0; }
p { margin: 0 0 1em; }
.content-section p, details p, .side-panel p, .note p { color: var(--muted); }
details { background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: 13px 15px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 700; line-height: 1.55; }
details p { margin: 10px 0 0; }
.side-panel, .note { background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.side-panel { position: sticky; top: 92px; }
.side-panel h2, .note h2 { font-size: 1.05rem; }
ul { padding-left: 1.2em; margin: 0; }
li { margin: 8px 0; }
.note { background: var(--mint); margin: 4px 0 28px; }
.site-footer { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1.5fr); gap: 28px; padding: 32px clamp(16px,4vw,48px); background: #3b3034; color: #fffafa; }
.site-footer p { color: #eadbdd; margin: 8px 0 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 10px 14px; align-content: start; }
.site-footer a { color: #fffafa; }
@media (max-width: 780px) {
  .site-header { display: block; padding: 14px 16px; }
  .brand { display: inline-block; margin-bottom: 10px; }
  main { width: min(100% - 28px,1120px); }
  .layout, .site-footer { grid-template-columns: 1fr; }
  .side-panel { position: static; }
  h1 { font-size: 2rem; }
}
@media (max-width: 420px) {
  main { width: min(100% - 24px,1120px); }
  .global-nav a { font-size: .84rem; padding-inline: 8px; }
  h1 { font-size: 1.78rem; }
}