:root {
  --bg-top: #08101c;
  --bg-bottom: #111d31;
  --panel: rgba(11, 19, 33, 0.82);
  --panel-strong: rgba(7, 13, 24, 0.9);
  --panel-soft: rgba(255, 255, 255, 0.04);
  --line: rgba(255, 255, 255, 0.1);
  --text: #f5f7fb;
  --muted: #b2bdd3;
  --accent: #e8bd76;
  --accent-soft: #f7dcb2;
  --success: #7ee0b0;
  --danger: #ff9f9f;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.34);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --max: 1380px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  color: var(--text);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background:
    radial-gradient(circle at 12% 12%, rgba(255,255,255,0.08), transparent 24%),
    radial-gradient(circle at 88% 0%, rgba(232,189,118,0.08), transparent 20%),
    linear-gradient(160deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.page-shell { width: min(calc(100% - 28px), var(--max)); margin: 18px auto 40px; }
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  margin-bottom: 18px; padding: 12px 14px; border: 1px solid var(--line);
  border-radius: 22px; background: rgba(7, 12, 22, 0.58); backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 48px; height: 48px; border-radius: 16px; display: grid; place-items: center;
  font-weight: 800; letter-spacing: .08em; color: #231402;
  background: linear-gradient(145deg, var(--accent), var(--accent-soft)); box-shadow: var(--shadow);
}
.brand-copy h1 { margin: 0; font-size: 1.22rem; }
.brand-copy p { margin: 4px 0 0; color: var(--muted); font-size: .92rem; }
.variant-nav { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.variant-chip {
  padding: 10px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: rgba(255,255,255,.04); color: var(--muted); font-size: .92rem; transition: .18s ease;
}
.variant-chip:hover, .variant-chip.is-active {
  color: var(--text); background: rgba(255,255,255,.08); border-color: rgba(232,189,118,.55); transform: translateY(-1px);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.96fr); gap: 20px; }
.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-xl);
  box-shadow: var(--shadow); backdrop-filter: blur(14px);
}
.hero-card { position: relative; overflow: hidden; min-height: 100%; }
.hero-card img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16/9; }
.hero-card::after {
  content: ''; position: absolute; inset: auto 0 0 0; height: 34%;
  background: linear-gradient(to top, rgba(0,0,0,.55), rgba(0,0,0,0));
}
.hero-overlay {
  position: absolute; inset: auto 0 0 0; z-index: 1; padding: 20px 22px 22px;
  display: flex; justify-content: space-between; align-items: end; gap: 14px;
}
.hero-meta h2 { margin: 8px 0 0; font-size: clamp(1.6rem, 2vw, 2.3rem); }
.hero-meta p { margin: 8px 0 0; color: rgba(255,255,255,.82); line-height: 1.6; max-width: 42ch; }
.hero-badge, .status-pill, .mini-pill {
  display: inline-flex; align-items: center; gap: 8px; width: fit-content;
  padding: 8px 12px; border-radius: 999px; font-size: .82rem; border: 1px solid rgba(255,255,255,.12);
  background: rgba(7, 12, 22, 0.54); backdrop-filter: blur(10px);
}
.hero-badge { color: var(--accent-soft); letter-spacing: .08em; text-transform: uppercase; }
.status-pill { color: var(--success); }
.detail-card { padding: 26px; display: flex; flex-direction: column; gap: 18px; }
.kicker { color: var(--accent-soft); letter-spacing: .1em; text-transform: uppercase; font-size: .82rem; }
.page-title { margin: 0; font-size: clamp(2rem, 2.5vw, 2.9rem); line-height: 1.08; }
.page-subtitle { margin: -4px 0 0; color: var(--muted); line-height: 1.8; font-size: .98rem; }
.summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px; }
.summary-card, .meta-card, .index-card, .check-card {
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.03));
  border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius-md);
}
.summary-card { padding: 14px 14px 12px; }
.summary-card strong { display: block; color: var(--accent-soft); font-size: .8rem; margin-bottom: 8px; }
.summary-card span { display: block; font-size: 1.3rem; font-weight: 800; }
.summary-card small { color: var(--muted); }
.copy-box {
  padding: 18px 18px 16px; border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03)); border: 1px solid rgba(255,255,255,.08);
}
.copy-box p { margin: 0; line-height: 1.95; }
.section-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.action-stack { display: grid; gap: 12px; }
.action-row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.action-btn, .secondary-btn {
  display: flex; align-items: center; justify-content: center; min-height: 54px; text-align: center;
  border-radius: 16px; padding: 14px 16px; transition: .18s ease; font-weight: 700;
}
.action-btn {
  background: linear-gradient(180deg, rgba(232,189,118,.26), rgba(255,255,255,.04));
  border: 1px solid rgba(232,189,118,.6);
}
.secondary-btn {
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.1); color: var(--muted);
}
.action-btn:hover, .secondary-btn:hover, .index-link:hover { transform: translateY(-1px); }
.meta-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.meta-card { padding: 14px 15px; }
.meta-card strong { display: block; color: var(--accent-soft); font-size: .8rem; margin-bottom: 7px; }
.meta-card span { color: var(--text); line-height: 1.7; }
.note {
  margin-top: auto; color: var(--muted); line-height: 1.75; font-size: .9rem;
  padding-top: 2px;
}
.index-hero {
  padding: 28px; margin-bottom: 20px; display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px;
}
.index-hero h2 { margin: 10px 0 8px; font-size: clamp(2rem, 2.5vw, 3rem); }
.index-hero p { color: var(--muted); line-height: 1.85; }
.checklist { display: grid; gap: 12px; }
.check-card { padding: 16px 16px 14px; }
.check-card strong { display: block; margin-bottom: 8px; color: var(--accent-soft); }
.index-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.index-card { overflow: hidden; }
.index-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.index-copy { padding: 18px; }
.index-copy h3 { margin: 0 0 8px; font-size: 1.3rem; }
.index-copy p { margin: 0 0 14px; color: var(--muted); line-height: 1.75; }
.index-link {
  display: inline-flex; align-items: center; gap: 8px; padding: 11px 14px; border-radius: 999px;
  border: 1px solid rgba(232,189,118,.45); background: rgba(255,255,255,.04);
}
.footer-line { margin-top: 18px; text-align: center; color: var(--muted); line-height: 1.75; }
.theme-mocha { --bg-top: #130d14; --bg-bottom: #24162a; }
.theme-emma { --bg-top: #09111c; --bg-bottom: #14263d; }
.theme-neo { --bg-top: #060d18; --bg-bottom: #10203a; }
.theme-pair { --bg-top: #120c16; --bg-bottom: #2a1830; }
.theme-trio { --bg-top: #081019; --bg-bottom: #1e2337; }
@media (max-width: 1120px) {
  .hero-grid, .index-hero { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 720px) {
  .page-shell { width: min(calc(100% - 20px), var(--max)); margin-top: 10px; }
  .topbar { padding: 12px; border-radius: 18px; }
  .hero-overlay { padding: 16px; flex-direction: column; align-items: flex-start; }
  .detail-card { padding: 20px; }
  .action-row, .meta-grid, .index-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}