/* サイト共通の外枠（ヘッダー・パンくず・記事本文・広告枠・フッター）。表のスタイルは各記事に埋め込んだ表ページのCSSを使う */
:root{
  --bg:#f3f4f7; --panel:#ffffff; --ink:#14161c; --ink2:#454b5a; --muted:#6f7687; --rule:#dde0e7; --rule2:#c6cad4;
  --accent:#8a5d00; --accent-fill:#c99a2e; --accent-soft:#f4ead3;
  --pos:#1c5dc2; --neg:#c0303b;
  --tt-title-bg:#161a24; --tt-head-bg:#3d6db3; --tt-g-bg:#e6eef9; --tt-line:#cfd6e2;
  --heat-neg:#d23c47; --heat-pos:#2f6fd0;
  --shadow:0 1px 2px rgba(20,22,28,.06), 0 8px 24px rgba(20,22,28,.06);
  --sans:"IBM Plex Sans JP","Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP","Yu Gothic",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --display:"Dela Gothic One","Hiragino Kaku Gothic StdN","Hiragino Sans","Noto Sans JP",sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0e1014; --panel:#161921; --ink:#eceef3; --ink2:#bac0cc; --muted:#8c93a4; --rule:#262a34; --rule2:#383d4a;
    --accent:#e3b54f; --accent-soft:#3a3018; --pos:#7eaaff; --neg:#ff7f89;
    --tt-title-bg:#07080b; --tt-head-bg:#27477a; --tt-g-bg:#1b2331; --tt-line:#2e3542;
    --heat-neg:#c43c46; --heat-pos:#3569c4;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0e1014; --panel:#161921; --ink:#eceef3; --ink2:#bac0cc; --muted:#8c93a4; --rule:#262a34; --rule2:#383d4a;
  --accent:#e3b54f; --accent-soft:#3a3018; --pos:#7eaaff; --neg:#ff7f89;
  --tt-title-bg:#07080b; --tt-head-bg:#27477a; --tt-g-bg:#1b2331; --tt-line:#2e3542;
  --heat-neg:#c43c46; --heat-pos:#3569c4;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration-color:var(--rule2);text-underline-offset:3px}
a:hover{text-decoration-color:var(--accent)}
.wrap{max-width:1180px;margin:0 auto;padding-inline:20px}
@media (max-width:520px){.wrap{padding-inline:16px}}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

/* site header */
.site-head{background:var(--tt-title-bg);color:#eceef3}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px 20px;flex-wrap:wrap;min-height:58px;padding-block:8px}
.brand{display:flex;align-items:baseline;gap:10px;text-decoration:none;color:inherit}
.brand .logo{font-family:var(--display);font-size:21px;letter-spacing:.03em;line-height:1}
.brand .logo em{font-style:normal;color:#e3b54f}
.brand .tag{font-size:12px;color:#9aa1b2}
.site-nav{display:flex;gap:2px 18px;flex-wrap:wrap;font-size:13.5px}
.site-nav a{text-decoration:none;color:#c9ceda;padding-block:4px}
.site-nav a:hover,.site-nav a[aria-current="page"]{color:#fff;box-shadow:inset 0 -2px 0 #e3b54f}
@media (max-width:520px){.brand .tag{display:none}}

/* breadcrumb */
.crumbs{font-size:12.5px;color:var(--muted);padding-top:14px}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:2px 0}
.crumbs li:not(:last-child)::after{content:"›";margin-inline:8px;color:var(--rule2)}
.crumbs a{text-decoration:none}
.crumbs a:hover{text-decoration:underline}

/* article prose blocks around the table */
.prose{max-width:760px}
.prose h2{font-size:clamp(19px,2.4vw,23px);font-weight:700;margin:34px 0 10px;padding-left:12px;border-left:4px solid var(--accent-fill);line-height:1.45}
.prose p{margin:0 0 14px;color:var(--ink2)}
.prose p strong{color:var(--ink)}
.points{background:var(--panel);border:1px solid var(--rule);border-radius:12px;padding:18px 22px;margin:22px 0 4px;box-shadow:var(--shadow);max-width:760px}
.points h2{margin:0 0 8px;font-size:15px;font-weight:700;padding:0;border:0;display:flex;align-items:center;gap:8px}
.points h2::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--accent-fill)}
.points ul{margin:0;padding-left:1.2em;color:var(--ink2)}
.points li{margin-block:4px}
.points li b{color:var(--ink)}
.points .num{font-family:var(--mono);font-weight:600;color:var(--ink)}
.toc{margin:18px 0 0;font-size:13.5px;max-width:760px}
.toc ol{margin:6px 0 0;padding-left:1.4em;color:var(--ink2)}
.toc .cap{font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.06em}
.mini{width:100%;max-width:520px;border-collapse:collapse;font-size:13.5px;margin:4px 0 16px;background:var(--panel)}
.mini th,.mini td{border:1px solid var(--tt-line);padding:5px 10px;text-align:right;font-family:var(--mono)}
.mini th{background:var(--tt-head-bg);color:#fff;font-family:var(--sans);font-weight:600;text-align:center}
.mini td:first-child{background:var(--tt-g-bg);font-weight:600;text-align:center}
.mini .neg{color:var(--neg)}

/* ad slots (placeholder until an ad network is approved) */
.ad{margin:26px 0;display:grid;place-items:center;min-height:120px;border:1px dashed var(--rule2);border-radius:10px;color:var(--muted);font-size:12px;letter-spacing:.08em;background:repeating-linear-gradient(135deg,transparent 0 10px,color-mix(in srgb,var(--rule) 40%,transparent) 10px 11px)}
.ad::before{content:"広告枠（審査通過後に広告コードを入れる場所）"}
.ad.side{min-height:250px;margin:0}
.pr-note{font-size:12px;color:var(--muted);margin-top:10px}

/* share + related */
.share{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:26px 0 0;font-size:13px}
.share .cap{color:var(--muted);margin-right:4px}
.share a{display:inline-flex;align-items:center;gap:6px;text-decoration:none;border:1px solid var(--rule2);background:var(--panel);border-radius:999px;padding:4px 14px;font-weight:600}
.share a:hover{border-color:var(--accent)}
.related{margin:30px 0 10px}
.related h2{font-size:17px;margin:0 0 12px}

/* card grid (index + related) */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.card{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--rule);border-radius:12px;overflow:hidden;text-decoration:none;box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.card:hover{transform:translateY(-2px);border-color:var(--rule2)}
.card .thumb{background:var(--tt-title-bg);padding:12px 12px 10px;aspect-ratio:16/8.4;display:flex;flex-direction:column;gap:6px;overflow:hidden}
.card .thumb .tb{font-size:11.5px;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card .thumb .grid{flex:1;display:grid;gap:1px;background:var(--tt-line);border-radius:3px;overflow:hidden}
.card .thumb .grid i{display:block}
.card .body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.card .meta{font-size:12px;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap}
.card .meta b{color:var(--accent);font-weight:600}
.card h3{margin:0;font-size:17px;line-height:1.45;text-wrap:balance}
.card p{margin:0;font-size:13.5px;color:var(--ink2)}

/* index layout */
/* トップの見出し：案F（方眼のノート風）。ほかの案は hero_samples.py */
.hero-note{background-color:var(--panel);background-image:linear-gradient(var(--tt-g-bg) 1px,transparent 1px),linear-gradient(90deg,var(--tt-g-bg) 1px,transparent 1px);background-size:22px 22px;border-bottom:1px solid var(--rule)}
.hero-note .inner{padding-block:40px 34px}
.hero-note .no{margin:0;font-family:var(--mono);font-size:12.5px;color:var(--muted)}
.hero-note h1{margin:10px 0 0;font-size:clamp(28px,4.4vw,40px);font-weight:700;line-height:1.3;display:inline;background:linear-gradient(transparent 62%,color-mix(in srgb,var(--accent-fill) 45%,transparent) 62%)}
.hero-note .lead{margin:16px 0 0;color:var(--ink2);max-width:60ch}
.hero{padding-block:34px 8px}
.hero h1{margin:0;font-family:var(--display);font-weight:400;font-size:clamp(28px,5vw,42px);line-height:1.15;letter-spacing:.02em}
.hero p{margin:12px 0 0;max-width:68ch;color:var(--ink2)}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;padding-block:24px 40px}
@media (max-width:900px){.layout{grid-template-columns:minmax(0,1fr)}}
.sec-title{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--muted);margin:0 0 12px;display:flex;align-items:center;gap:10px}
.sec-title::after{content:"";flex:1;height:1px;background:var(--rule)}
.side-box{background:var(--panel);border:1px solid var(--rule);border-radius:12px;padding:16px 18px;margin-bottom:18px;font-size:13.5px}
.side-box h2{margin:0 0 8px;font-size:14px}
.side-box ul{margin:0;padding-left:1.1em;color:var(--ink2)}
.side-box p{margin:0;color:var(--ink2)}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tags a{font-size:12.5px;text-decoration:none;border:1px solid var(--rule);border-radius:999px;padding:1px 10px;color:var(--ink2)}

/* static pages */
.page{max-width:760px;padding-block:28px 40px}
.page h1{font-size:clamp(24px,3.6vw,30px);margin:0 0 18px}
.page h2{font-size:18px;margin:30px 0 8px}
.page p,.page li{color:var(--ink2)}
.page ul{padding-left:1.3em}

/* footer */
.site-foot{border-top:1px solid var(--rule);margin-top:40px;padding-block:24px 34px;font-size:12.5px;color:var(--muted)}
.site-foot .wrap{display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between}
.site-foot nav{display:flex;flex-wrap:wrap;gap:4px 16px}
.site-foot a{text-decoration:none}
.site-foot a:hover{text-decoration:underline}
.site-foot .warn{flex-basis:100%;margin:0}