:root {
  --bg: #f5f7fb;
  --surface: rgba(255,255,255,.88);
  --surface-strong: #ffffff;
  --text: #172033;
  --muted: #5f6b85;
  --line: rgba(7,61,128,.14);
  --accent: #073D80;
  --accent-2: #2f78d6;
  --shadow: 0 20px 50px rgba(12, 27, 56, .12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system,BlinkMacSystemFont,'Hiragino Sans','Yu Gothic UI','Yu Gothic','Noto Sans JP',Meiryo,sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(47,120,214,.14), transparent 34%),
    radial-gradient(circle at top right, rgba(7,61,128,.11), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
  line-height: 1.8;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
.wrapper { width: min(calc(100% - 32px), var(--max)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 30; backdrop-filter: blur(14px); background: rgba(248,251,255,.76); border-bottom: 1px solid rgba(7,61,128,.08); }
.site-header-inner { display:flex; align-items:center; justify-content:space-between; gap:16px; padding: 14px 0; }
.brand { display:flex; align-items:center; gap:12px; min-width:0; }
.brand-badge { width: 40px; height: 40px; border-radius: 14px; background: linear-gradient(135deg, var(--accent), #6fa8ff); box-shadow: 0 10px 24px rgba(7,61,128,.18); }
.brand-text { min-width:0; }
.brand-title { font-size: clamp(14px, 2vw, 18px); font-weight: 800; line-height: 1.3; margin: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.brand-sub { color: var(--muted); font-size: 12px; margin-top: 2px; }
.header-links { display:flex; gap:10px; flex-wrap:wrap; justify-content:flex-end; }
.pill { display:inline-flex; align-items:center; gap:8px; padding: 10px 14px; border: 1px solid var(--line); background: rgba(255,255,255,.7); border-radius: 999px; color: var(--text); font-size: 14px; font-weight: 700; }
.pill.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color:#fff; border-color: transparent; }
.hero { padding: 30px 0 20px; }
.hero-grid { display:grid; grid-template-columns: 1.25fr .95fr; gap: 26px; align-items: stretch; }
.card { background: var(--surface); border: 1px solid rgba(255,255,255,.6); box-shadow: var(--shadow); border-radius: var(--radius-xl); }
.hero-copy { padding: 28px; position: relative; overflow: hidden; }
.hero-copy::after { content:''; position:absolute; inset:auto -60px -60px auto; width:200px; height:200px; background: radial-gradient(circle, rgba(47,120,214,.15), transparent 68%); }
.eyebrow { display:inline-flex; gap:8px; flex-wrap:wrap; align-items:center; color: var(--accent); font-size: 13px; font-weight: 800; letter-spacing:.04em; text-transform: uppercase; }
.hero-title { font-size: clamp(28px, 4vw, 48px); line-height: 1.18; letter-spacing: -.02em; margin: 14px 0 14px; }
.hero-catch { font-size: clamp(17px, 2.2vw, 24px); line-height: 1.5; color: #173d71; font-weight: 700; margin: 0 0 16px; }
.hero-summary { color: var(--muted); font-size: 15px; }
.meta-grid { display:grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px; margin-top: 22px; }
.meta-item { padding: 14px 14px 12px; border-radius: 18px; background: rgba(255,255,255,.72); border: 1px solid rgba(7,61,128,.08); }
.meta-label { color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.meta-value { font-size: 15px; font-weight: 800; }
.hero-cover { overflow:hidden; min-height:100%; position:relative; }
.hero-cover img { width:100%; height:100%; object-fit:cover; min-height: 100%; }
.hero-cover-overlay { position:absolute; inset:auto 0 0 0; padding: 24px; color:#fff; background: linear-gradient(180deg, transparent, rgba(10,20,38,.75)); }
.hero-cover-overlay strong { display:block; font-size: 20px; margin-bottom: 8px; }
.section { padding: 14px 0 34px; }
.section-head { display:flex; justify-content:space-between; gap:16px; align-items:end; margin-bottom: 16px; }
.section-head h2 { margin:0; font-size: clamp(24px, 3vw, 34px); line-height:1.2; }
.section-head p { margin:6px 0 0; color:var(--muted); }
.note-box { padding: 18px 20px; margin-bottom: 18px; border-radius: var(--radius-lg); background: linear-gradient(135deg, rgba(7,61,128,.06), rgba(47,120,214,.06)); border: 1px solid rgba(7,61,128,.1); color: #17304d; }
.episode-list { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.episode-card { display:flex; flex-direction:column; gap:14px; padding: 22px; border-radius: 24px; background: rgba(255,255,255,.9); border:1px solid rgba(7,61,128,.08); box-shadow: 0 12px 28px rgba(15, 36, 70, .08); transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.episode-card:hover { transform: translateY(-3px); box-shadow: 0 18px 32px rgba(15,36,70,.12); border-color: rgba(7,61,128,.18); text-decoration:none; }
.episode-topline { display:flex; justify-content:space-between; gap:12px; align-items:flex-start; }
.episode-no { display:inline-flex; align-items:center; padding: 6px 10px; border-radius: 999px; background: rgba(7,61,128,.08); color: var(--accent); font-size: 12px; font-weight: 900; }
.episode-title { margin: 10px 0 0; font-size: 22px; line-height: 1.45; color: var(--text); }
.episode-excerpt { color: var(--muted); font-size: 14px; margin:0; }
.tag-row { display:flex; gap:8px; flex-wrap:wrap; }
.tag { display:inline-flex; padding: 6px 10px; border-radius: 999px; background: rgba(47,120,214,.08); color:#27579a; font-size:12px; font-weight:700; }
.footer { padding: 18px 0 40px; color: var(--muted); font-size: 14px; }
.footer .card { padding: 20px 22px; }
.article-wrap { padding: 30px 0 40px; }
.article-grid { display:grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 24px; align-items:start; }
.article-main { padding: 26px; }
.breadcrumbs { display:flex; gap:8px; flex-wrap:wrap; color: var(--muted); font-size: 13px; margin-bottom: 10px; }
.article-title { font-size: clamp(26px, 4vw, 42px); line-height: 1.24; margin: 10px 0 12px; }
.article-lead { color:#20477d; font-size:18px; font-weight:700; margin-bottom: 18px; }
.article-actions { display:flex; gap:10px; flex-wrap:wrap; margin: 18px 0 22px; }
.article-cover { border-radius: 20px; overflow:hidden; border:1px solid rgba(7,61,128,.08); margin-bottom: 24px; }
.article-cover img { width:100%; aspect-ratio: 16 / 6; object-fit: cover; }
.trivia-content { font-size: 16px; }
.trivia-content p { margin: 0 0 18px; }
.trivia-block { padding: 20px; border-radius: 20px; background: linear-gradient(180deg, rgba(255,255,255,.95), rgba(245,249,255,.95)); border: 1px solid rgba(7,61,128,.1); box-shadow: 0 12px 28px rgba(7,61,128,.06); margin: 0 0 18px; }
.trivia-block h2 { margin: 0 0 10px; font-size: 22px; line-height: 1.45; color: var(--accent); }
.trivia-block p { margin: 0; color: var(--text); }
.sidebar { display:flex; flex-direction:column; gap: 16px; position: sticky; top: 84px; }
.sidebar-card { padding: 18px; border-radius: 24px; background: rgba(255,255,255,.92); border:1px solid rgba(7,61,128,.08); box-shadow: 0 12px 28px rgba(12, 27, 56, .08); }
.sidebar-card h3 { margin: 0 0 10px; font-size: 17px; }
.toc-list, .mini-list { list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:8px; }
.toc-list a, .mini-list a { display:block; padding: 10px 12px; border-radius: 14px; background: rgba(7,61,128,.04); color: var(--text); font-size: 14px; }
.toc-list a.current { background: linear-gradient(135deg, rgba(7,61,128,.12), rgba(47,120,214,.12)); color: var(--accent); font-weight: 800; }
.floating-toc { border: 1px solid rgba(7,61,128,.08); border-radius: 22px; background: rgba(248,251,255,.88); overflow: hidden; }
.floating-toc + .small { margin-top: 10px; }
.floating-toc-summary { list-style: none; cursor: pointer; display:flex; align-items:center; justify-content:space-between; gap:12px; padding: 14px 16px; font-weight: 800; color: var(--text); background: linear-gradient(135deg, rgba(7,61,128,.05), rgba(47,120,214,.08)); }
.floating-toc-summary::-webkit-details-marker { display:none; }
.floating-toc-summary::after { content: '＋'; font-size: 20px; line-height: 1; color: var(--accent); }
.floating-toc[open] .floating-toc-summary::after { content: '−'; }
.floating-toc-body { padding: 12px; max-height: 360px; overflow: auto; }
.floating-toc-label-compact { display:none; }
.nav-siblings { display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; margin-top: 26px; }
.nav-siblings a { display:flex; min-height:82px; padding: 16px; border-radius: 18px; border:1px solid rgba(7,61,128,.08); background: rgba(248,251,255,.95); color: var(--text); align-items:center; }
.nav-siblings a.center { justify-content:center; font-weight:800; }
.subtle { color: var(--muted); }
.small { font-size: 13px; }
@media (max-width: 1040px) {
  .hero-grid, .article-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; order: 2; }
  .floating-toc-wrap { position: fixed; right: 16px; bottom: 16px; z-index: 80; max-width: min(86vw, 360px); width: auto; }
  .floating-toc-wrap .sidebar-card { padding: 0; background: transparent; border: 0; box-shadow: none; }
  .floating-toc-wrap .sidebar-card h3, .floating-toc-wrap .small { display: none; }
  .floating-toc { border-radius: 24px; box-shadow: 0 18px 36px rgba(7,61,128,.22); background: rgba(255,255,255,.98); backdrop-filter: blur(14px); }
  .floating-toc-summary { min-width: 72px; min-height: 72px; padding: 14px 18px; border-radius: 24px; justify-content: center; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color:#fff; box-shadow: 0 14px 32px rgba(7,61,128,.28); }
  .floating-toc-summary::after { color:#fff; margin-left: 2px; }
  .floating-toc:not([open]) .floating-toc-summary { border-radius: 999px; }
  .floating-toc-label-full { display:none; }
  .floating-toc-label-compact { display:inline; }
  .floating-toc[open] { width: min(86vw, 360px); }
  .floating-toc[open] .floating-toc-summary { min-width: 0; width: 100%; justify-content: space-between; border-radius: 24px 24px 0 0; }
  .floating-toc-body { max-height: min(58vh, 420px); padding: 12px; background: rgba(255,255,255,.98); }
}
@media (max-width: 760px) {
  .wrapper { width: min(calc(100% - 20px), var(--max)); }
  .site-header-inner { align-items:flex-start; flex-direction:column; }
  .header-links { width:100%; justify-content:flex-start; }
  .hero-copy, .article-main { padding: 20px; }
  .section-head { flex-direction:column; align-items:flex-start; }
  .episode-list { grid-template-columns: 1fr; }
  .meta-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .article-lead { font-size:16px; }
  .nav-siblings { grid-template-columns: 1fr; }
  .trivia-block h2 { font-size: 19px; }
  .episode-title { font-size: 20px; }
  .sidebar-card { padding: 14px; border-radius: 20px; }
  .floating-toc-wrap { right: 12px; bottom: 12px; }
  .floating-toc-summary { min-width: 64px; min-height: 64px; padding: 12px 16px; }
  .floating-toc-body { max-height: min(56vh, 340px); }
}
@media (max-width: 480px) {
  .pill { width:100%; justify-content:center; }
  .meta-grid { grid-template-columns: 1fr; }
}