:root {
  color-scheme: dark;
  --bg: #0b0b0c; --panel: #141416; --panel-2: #1b1b1e; --line: #2a2a2f;
  --fg: #e4e1dc; --muted: #8f8a84; --accent: #e0312b; --accent-hi: #ff5a4f;
  --serif: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP", serif;
  --sans: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--sans); line-height: 1.85;
       font-size: 16px; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--accent-hi); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
.wrap { width: min(960px, 100%); margin: 0 auto; padding: 0 16px; }
main.wrap { flex: 1; padding-top: 32px; padding-bottom: 64px; }

.site-header { border-bottom: 1px solid var(--line); background: rgb(11 11 12 / .92); position: sticky; top: 0; z-index: 10;
               backdrop-filter: blur(6px); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-family: var(--serif); font-size: 1.15rem;
         letter-spacing: .08em; }
.brand:hover { text-decoration: none; color: #fff; }
.brand img { border-radius: 50%; }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 20px; font-size: .9rem; }
.site-nav a { color: var(--muted); padding: 4px 0; border-bottom: 2px solid transparent; }
.site-nav a:hover { color: var(--fg); text-decoration: none; }
.site-nav a[aria-current] { color: var(--fg); border-bottom-color: var(--accent); }

.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; padding: 24px 0; }
.site-footer p { margin: 0; }
.site-footer .small { font-size: .75rem; opacity: .7; }

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; line-height: 1.4; letter-spacing: .04em; }
.page-title { font-size: clamp(1.5rem, 4vw, 2.1rem); margin: 0 0 24px; }
.section-title { font-size: 1.25rem; margin: 0 0 16px; padding-left: 12px; border-left: 3px solid var(--accent); }
.block { margin-top: 48px; }

.button { display: inline-block; padding: 10px 22px; border: 1px solid var(--line); border-radius: 4px; color: var(--fg);
          background: var(--panel); font-size: .95rem; letter-spacing: .05em; transition: border-color .15s, background .15s; }
.button:hover { text-decoration: none; border-color: var(--muted); }
.button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.button.primary:hover { background: var(--accent-hi); border-color: var(--accent-hi); }

.hero { display: flex; align-items: center; gap: 32px; padding: 24px 0 8px; }
.hero-mask { width: 200px; height: 200px; border-radius: 50%; flex-shrink: 0;
             box-shadow: 0 0 60px rgb(224 49 43 / .18); }
.hero h1 { font-size: clamp(1.8rem, 6vw, 2.8rem); margin: 0 0 8px; letter-spacing: .12em; }
.hero-desc { color: var(--muted); }
.hero-desc p { margin: 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0 0; }
@media (max-width: 640px) {
  .hero { flex-direction: column; text-align: center; gap: 16px; }
  .hero-mask { width: 140px; height: 140px; }
  .hero-actions { justify-content: center; }
}

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.card { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
        overflow: hidden; color: var(--fg); transition: border-color .15s, transform .15s; }
.card:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-2px); }
.card img, .card .noimg { width: 100%; aspect-ratio: 632 / 453; object-fit: cover; display: block; background: var(--panel-2); }
.card-body { display: flex; flex-direction: column; gap: 2px; padding: 12px 14px 14px; }
.card-title { font-family: var(--serif); font-size: 1.05rem; font-weight: 600; }
.meta { color: var(--muted); font-size: .85rem; }
.card .date, .scenario .date { color: var(--muted); font-size: .8rem; }

.lead { color: var(--fg); background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 16px 20px; }
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 8px; }
.toc a { padding: 4px 14px; border: 1px solid var(--line); border-radius: 999px; color: var(--fg); font-size: .9rem; }
.toc a:hover { border-color: var(--accent); text-decoration: none; }
.category { margin-top: 48px; scroll-margin-top: 80px; }
.category-desc { color: var(--muted); margin-bottom: 16px; }
.entries { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.entry { display: grid; grid-template-columns: 200px 1fr; gap: 18px; background: var(--panel); border: 1px solid var(--line);
         border-radius: 6px; padding: 14px; }
.entry.no-thumb { grid-template-columns: 1fr; }
.entry .thumb img { width: 100%; aspect-ratio: 632 / 453; object-fit: cover; border-radius: 3px; display: block; }
.entry h3 { margin: 0 0 2px; font-size: 1.15rem; }
.entry h3 a { color: var(--fg); }
.entry h3 a:hover { color: var(--accent-hi); }
.entry .meta { margin: 0 0 6px; font-style: italic; }
.entry .content p { margin: 0 0 .4em; }
@media (max-width: 640px) { .entry { grid-template-columns: 1fr; } }

.crumbs { font-size: .85rem; color: var(--muted); margin-bottom: 12px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--fg); }
.scenario-head { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 28px; align-items: start; }
@media (max-width: 760px) { .scenario-head { grid-template-columns: 1fr; } }
.key { margin: 0; }
.key img { display: block; width: 100%; border: 1px solid var(--line); border-radius: 4px; }
.info { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 18px 20px; }
.specs { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0 0 18px; font-size: .92rem; }
.specs dt { color: var(--muted); white-space: nowrap; }
.specs dd { margin: 0; }
.specs dd.note { grid-column: 1 / -1; color: var(--accent-hi); font-size: .85rem; }
.download { display: block; text-align: center; font-weight: 600; padding: 12px; }
.catch { text-align: center; font-family: var(--serif); font-size: clamp(1.1rem, 3vw, 1.45rem); margin: 48px 0 32px;
         letter-spacing: .08em; }
.catch p { margin: .4em 0; }
.scenario .body { max-width: 720px; margin: 0 auto; }
.scenario .date { text-align: right; margin-top: 32px; }

.content { overflow-wrap: anywhere; }
.content img { display: block; margin: 24px auto; border: 1px solid var(--line); border-radius: 4px; }
.content blockquote { margin: 1.4em 0; padding: 4px 18px; border-left: 3px solid var(--accent); color: var(--fg);
                      font-family: var(--serif); font-style: italic; background: var(--panel); }
.content h2 { font-size: 1.3rem; margin: 2em 0 .6em; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.content h3 { font-size: 1.1rem; margin: 1.6em 0 .4em; }
.content h4 { font-size: 1rem; margin: 1.4em 0 .3em; }
.content strong { color: #fff; }
.content hr { border: 0; border-top: 1px solid var(--line); margin: 2em 0; }
.content iframe { display: block; width: 100%; max-width: 680px; min-height: 900px; border: 0; margin: 0 auto;
                  background: #fff; border-radius: 6px; }
.content .warn, .warn { color: var(--accent-hi); font-weight: 600; }
.content table { border-collapse: collapse; }
.content th, .content td { border: 1px solid var(--line); padding: 4px 10px; }