/* legacy-edu.css: colours and hero of the 2026-10-07 top page, scoped to body.legacy (generated) */
body.legacy{--wine:#1c1f25;--wine-dark:#0f1115;--wine-deep:#0a0b0e;
  --gold:#b08d57;--gold-light:#d4ad7e;--gold-pale:#f0e6d8;--gold-ink:#7d5a2a;
  --cream:#f8f6f2;--paper:#ffffff;--gray:#e4e2dd;
  --ink:#1c1f25;--text:#262b33;--muted:#4c5563;--line:#e8e4dc;
  --blue:#2477a4;--blue-wash:#e4f0f7;--ochre:#9a6100;--ochre-wash:#f6ecdc;
  --f-serif:Georgia,"Noto Serif JP","Hiragino Mincho ProN",serif;
  --f-sans:Arial,Helvetica,"Hiragino Sans","Yu Gothic",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
  --nav-h:56px;
  color-scheme:light;}
body.legacy *{box-sizing:border-box}
body.legacy{background:var(--cream);color:var(--ink);font-family:var(--f-sans);line-height:1.8;font-size:16px}
body.legacy a{color:inherit;text-decoration:none}
body.legacy :focus-visible{outline:2px solid var(--gold);outline-offset:3px}
body.legacy p{margin:0}
body.legacy h1,body.legacy h2,body.legacy h3,body.legacy h4{margin:0;text-wrap:balance}
body.legacy h1,body.legacy h2,body.legacy h3,body.legacy h4,body.legacy .pc-name,body.legacy .results li,body.legacy .tools b{word-break:auto-phrase}
body.legacy [id]{scroll-margin-top:calc(var(--nav-h) + 16px)}
body.legacy .accent{color:var(--gold-light)}
body.legacy .tag{font-size:9px;letter-spacing:.24em;color:var(--gold-ink);font-weight:700}
body.legacy .hero-img{background:#0a0b0e}
body.legacy .hero-img img{display:block;width:100%;height:auto}
body.legacy .hero-copy{background:#0a0b0e;padding:34px max(24px,calc((100% - var(--measure))/2)) 44px}
body.legacy .os-name{display:block;font-family:Georgia,var(--f-serif);font-size:13px;letter-spacing:.24em;color:var(--gold-light);margin-bottom:12px;text-transform:uppercase}
body.legacy .hero-copy .diff{font-family:var(--f-serif);font-size:clamp(17px,4.2vw,21px);color:#fff;letter-spacing:.03em;line-height:1.6;max-width:560px;margin:0 0 12px}
body.legacy .hero-copy .diff em{font-style:normal;color:var(--gold-light)}
body.legacy .hero-copy p.sub{font-family:var(--f-serif);font-size:14.5px;color:rgba(255,255,255,.78);line-height:1.9;max-width:540px;margin:0 0 24px}
body.legacy .cta-row{display:flex;gap:10px;flex-wrap:wrap;max-width:420px}
body.legacy .btn{display:inline-block;padding:13px 22px;font-size:13px;font-weight:700;letter-spacing:.06em;flex:1;white-space:nowrap;text-align:center;transition:.2s}
body.legacy .btn-gold{background:var(--gold);color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.3)}
body.legacy .btn-gold:hover{background:var(--gold-light)}
body.legacy .btn-line{border:1px solid rgba(212,173,126,.6);color:var(--gold-light)}
body.legacy .btn-line:hover{background:rgba(212,173,126,.12)}
body.legacy section{padding:52px 20px}
body.legacy section.bg-gray{background:var(--gray);box-shadow:inset 0 4px 16px rgba(0,0,0,.06),inset 0 -4px 16px rgba(0,0,0,.06)}
body.legacy .sec-head{max-width:var(--measure);margin:0 auto 30px}
body.legacy .sec-label{display:table;background:var(--wine);color:#fff;font-size:11px;letter-spacing:.25em;padding:5px 12px;margin:0 0 14px;font-weight:700}
body.legacy .sec-title{display:block;font-family:var(--f-serif);font-size:clamp(21px,4.8vw,28px);font-weight:600;line-height:1.55;letter-spacing:.05em;color:var(--wine-dark)}
body.legacy .sec-title .accent{color:var(--gold)}
body.legacy .sec-title::after{content:"";display:block;width:34px;height:2px;margin:12px 0 0;background:linear-gradient(90deg,rgba(176,141,87,.15),var(--gold),rgba(176,141,87,.15))}
body.legacy .sec-note{font-size:14.5px;color:var(--text);line-height:1.95;letter-spacing:.03em;max-width:var(--measure);margin:14px auto 0}
body.legacy .sub-head{max-width:var(--measure);margin:40px auto 8px;font-family:var(--f-serif);font-size:16px;font-weight:600;color:var(--wine-dark);letter-spacing:.05em}
body.legacy .sub-note{font-size:14.5px;color:var(--text);max-width:var(--measure);margin:0 auto 10px;line-height:1.95}
body.legacy .can{max-width:var(--measure);margin:26px auto 6px;font-family:var(--f-serif);font-size:15px;font-weight:600;color:var(--gold-ink);letter-spacing:.03em}
body.legacy .example{display:flex;align-items:center;gap:10px;max-width:var(--measure);margin:12px auto 0;font-family:var(--f-serif);font-size:15px;color:var(--wine-dark)}
body.legacy .example span{font-family:var(--f-sans);font-size:10px;letter-spacing:.2em;color:#fff;background:var(--gold);padding:3px 8px;border-radius:2px}
body.legacy .figure{max-width:var(--measure);margin:0 auto}
body.legacy .figure img{display:block;width:100%;height:auto;border-radius:6px;box-shadow:0 10px 30px rgba(15,17,21,.18)}
body.legacy .video-frame{max-width:var(--measure);margin:0 auto;aspect-ratio:16/9;background:#0f1115 url("../img/hero-evidence-en.jpg") center/cover;border-radius:6px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;box-shadow:0 10px 30px rgba(15,17,21,.25)}
body.legacy .video-frame::before{content:"";position:absolute;inset:0;background:rgba(10,11,14,.55)}
body.legacy .video-frame .play{position:relative;width:72px;height:72px;border-radius:50%;background:var(--gold);display:flex;align-items:center;justify-content:center}
body.legacy .video-frame .play::after{content:"";margin-left:6px;border-style:solid;border-width:13px 0 13px 22px;border-color:transparent transparent transparent #fff}
body.legacy .video-cap{position:absolute;bottom:14px;left:16px;font-size:12px;letter-spacing:.1em;color:rgba(255,255,255,.85)}
body.legacy .global{background:var(--wine-dark);padding:52px 20px;position:relative;overflow:hidden;box-shadow:inset 0 10px 36px rgba(0,0,0,.35)}
body.legacy .global::before,body.legacy .footer-cta::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(-45deg,transparent,transparent 36px,rgba(176,141,87,.05) 36px,rgba(176,141,87,.05) 37px);pointer-events:none}
body.legacy .global > *{position:relative}
body.legacy .global .sec-label{background:var(--gold);color:#fff}
body.legacy .global .sec-title{color:#fff}
body.legacy .global .sec-title .accent{color:var(--gold-light)}
body.legacy .global .sec-note{color:rgba(255,255,255,.88)}
body.legacy .stats{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;max-width:var(--measure);margin:0 auto;list-style:none;padding:0}
@media(min-width:560px){body.legacy .stats{grid-template-columns:repeat(2,minmax(0,1fr))}}
body.legacy .stats li{border:1px solid rgba(212,173,126,.45);border-radius:6px;padding:18px 18px 14px;display:flex;flex-direction:column;gap:6px;background:rgba(255,255,255,.06)}
body.legacy .stats b{font-family:Georgia,var(--f-serif);font-size:34px;font-weight:600;color:var(--gold-light);line-height:1.1;font-variant-numeric:tabular-nums}
body.legacy .stats b small{font-size:15px;margin-left:3px}
body.legacy .stats .stat-n{font-family:Georgia,serif;font-size:11px;letter-spacing:.2em;color:rgba(255,255,255,.45)}
body.legacy .stats h4{font-family:var(--f-serif);font-size:16px;font-weight:600;color:#fff;line-height:1.5}
body.legacy .stats p{font-size:13.5px;color:rgba(255,255,255,.88);line-height:1.85}
body.legacy .stats cite{font-style:normal;font-size:10.5px;color:rgba(255,255,255,.62);letter-spacing:.02em}
body.legacy .crit{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;max-width:var(--measure);margin:0 auto;list-style:none;padding:0}
@media(min-width:520px){body.legacy .crit{grid-template-columns:repeat(2,minmax(0,1fr))}}
body.legacy .crit li{background:#fff;border:1px solid rgba(28,31,37,.16);border-radius:6px;padding:18px 18px 16px;display:flex;flex-direction:column;gap:6px}
body.legacy .crit .n{font-family:Georgia,serif;font-size:22px;color:var(--gold);line-height:1}
body.legacy .crit h4{font-family:var(--f-serif);font-size:16px;font-weight:600;color:var(--wine-dark)}
body.legacy .crit p{font-size:13.5px;color:var(--muted);line-height:1.85}
body.legacy .crit .more{margin-top:auto;padding-top:6px;align-self:flex-start;font-size:12.5px;font-weight:700;color:var(--gold-ink)}
body.legacy .crit .more::after{content:" ›"}
body.legacy .crit .more:hover{text-decoration:underline}
body.legacy .readmore{max-width:var(--measure);margin:22px auto 0}
body.legacy .readmore .tag{display:block;margin-bottom:8px}
body.legacy .readmore ul{list-style:none;margin:0;padding:0;background:#fff;border:1px solid rgba(28,31,37,.16);border-radius:6px}
body.legacy .readmore li{border-bottom:1px solid var(--line)}
body.legacy .readmore li:last-child{border-bottom:none}
body.legacy .readmore a{display:flex;justify-content:space-between;gap:12px;padding:12px 16px;font-size:14px;color:var(--wine-dark);line-height:1.6}
body.legacy .readmore a::after{content:"›";color:var(--gold);font-size:18px;line-height:1}
body.legacy .readmore a:hover{background:var(--gold-pale)}
body.legacy .thesis .readmore{margin-top:26px}
body.legacy .thesis .readmore .tag{color:var(--gold-light)}
body.legacy .thesis .readmore ul{background:transparent;border-color:rgba(212,173,126,.4)}
body.legacy .thesis .readmore li{border-color:rgba(212,173,126,.25)}
body.legacy .thesis .readmore a{color:#fff}
body.legacy .thesis .readmore a::after{color:var(--gold-light)}
body.legacy .thesis .readmore a:hover{background:rgba(255,255,255,.06)}
body.legacy .two-causes{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;max-width:var(--measure);margin:0 auto 26px}
@media(min-width:560px){body.legacy .two-causes.three{grid-template-columns:repeat(3,minmax(0,1fr))}}
body.legacy .tc{background:var(--wine);border-radius:6px;padding:18px 16px;display:flex;flex-direction:column;gap:6px}
body.legacy .tc-k{font-family:var(--f-serif);font-size:13px;letter-spacing:.2em;color:var(--gold-light);line-height:1}
body.legacy .tc h4{font-family:var(--f-serif);font-size:16px;color:#fff;font-weight:600;line-height:1.5}
body.legacy .tc p{font-size:13.5px;color:rgba(255,255,255,.85);line-height:1.85}
body.legacy .matrix-wrap{max-width:var(--measure);margin:0 auto;overflow-x:auto;background:#fff;border:1px solid rgba(28,31,37,.16);border-radius:6px}
body.legacy .matrix{width:100%;border-collapse:collapse;font-size:12.5px;min-width:360px}
body.legacy .matrix th,body.legacy .matrix td{padding:10px 8px;border-bottom:1px solid var(--line);text-align:center}
body.legacy .matrix thead th{font-size:11px;color:var(--muted);font-weight:700;line-height:1.4;background:var(--cream)}
body.legacy .matrix thead th:first-child,body.legacy .matrix tbody th{text-align:left}
body.legacy .matrix tbody th{font-family:var(--f-serif);font-weight:600;color:var(--wine-dark)}
body.legacy .matrix tbody th small{display:block;font-family:var(--f-sans);font-size:11px;font-weight:500;color:var(--muted);margin-top:2px}
body.legacy .matrix td{color:var(--gold);font-size:15px}
body.legacy .matrix tbody tr:last-child th,body.legacy .matrix tbody tr:last-child td{border-bottom:none}
body.legacy .cycles{display:grid;grid-template-columns:minmax(0,1fr);gap:14px;align-items:center;max-width:var(--measure);margin:0 auto}
@media(min-width:620px){body.legacy .cycles{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:8px}}
body.legacy .cycle-card{margin:0;border-radius:6px;overflow:hidden;border:1px solid rgba(176,141,87,.35)}
body.legacy .cycle-card svg{display:block;width:100%;height:auto}
body.legacy .cycle-card figcaption{font-size:12px;font-weight:700;letter-spacing:.12em;padding:10px 14px}
body.legacy .cycle-card.vic{background:#0f1115}
body.legacy .cycle-card.vic figcaption{color:#d4ad7e}
body.legacy .cycle-card.vir{background:#f8f6f2}
body.legacy .cycle-card.vir figcaption{color:#7d5a2a}
body.legacy .cycle-arrow{display:flex;justify-content:center;align-items:center}
body.legacy .cycle-arrow svg{display:block;width:26px;height:26px}
@media(max-width:619px){body.legacy .cycle-arrow svg{transform:rotate(90deg)}}
body.legacy .answer{max-width:var(--measure);margin:18px auto 0;background:var(--wine-dark);color:#fff;border-radius:6px;padding:22px 20px}
body.legacy .answer .tag{color:var(--gold-light);display:block;margin-bottom:8px}
body.legacy .answer p{font-family:var(--f-serif);font-size:15px;line-height:1.95;letter-spacing:.04em}
body.legacy .answer p em{font-style:normal;color:var(--gold-light)}
body.legacy .solve{max-width:var(--measure);margin:0 auto;display:flex;flex-direction:column;gap:10px}
body.legacy .solve-row{display:grid;grid-template-columns:minmax(0,1fr) 22px minmax(0,1.25fr);align-items:stretch;gap:8px}
body.legacy .solve-row .q,body.legacy .solve-row .a{border-radius:5px;padding:14px 16px;display:flex;flex-direction:column;gap:3px}
body.legacy .solve-row .q{background:#fff;border:1px solid rgba(28,31,37,.16)}
body.legacy .solve-row .a{background:#f3e7d3;border:1px solid rgba(176,141,87,.4)}
body.legacy .solve-row .k{font-size:9px;letter-spacing:.2em;font-weight:700;color:var(--muted)}
body.legacy .solve-row .a .k{color:var(--gold-ink)}
body.legacy .solve-row h4{font-family:var(--f-serif);font-size:16px;font-weight:600;color:var(--wine-dark);line-height:1.5}
body.legacy .solve-row .q h4{font-size:15px}
body.legacy .solve-row p{font-size:13.5px;color:var(--text);line-height:1.85}
body.legacy .solve-row .ar{display:flex;align-items:center;justify-content:center;color:var(--gold);font-size:18px}
@media(max-width:520px){body.legacy .solve-row{grid-template-columns:minmax(0,1fr)}
body.legacy .solve-row .ar{transform:rotate(90deg);height:18px}}
body.legacy .principles{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;max-width:var(--measure);margin:32px auto 0}
@media(min-width:560px){body.legacy .grid2{grid-template-columns:repeat(2,minmax(0,1fr))}}
body.legacy .pri{background:#fff;border-left:4px solid var(--gold);padding:16px 18px;box-shadow:0 4px 14px rgba(15,17,21,.05)}
body.legacy .pri h4{font-family:var(--f-serif);font-size:16px;font-weight:600;color:var(--wine-dark);margin-bottom:4px}
body.legacy .pri p{font-size:13.5px;color:var(--muted);line-height:1.85}
body.legacy .pri cite.ref{display:block;font-style:normal;font-size:10.5px;color:var(--gold);margin-top:6px;letter-spacing:.02em}
body.legacy .have{max-width:var(--measure);margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr);gap:10px}
@media(min-width:560px){body.legacy .have{grid-template-columns:repeat(2,minmax(0,1fr))}}
body.legacy .pc{background:linear-gradient(180deg,#fff 0%,#fafaf6 100%);border:1px solid rgba(28,31,37,.16);border-radius:10px;padding:20px 18px 16px;position:relative;overflow:hidden;display:flex;flex-direction:column;gap:6px;box-shadow:0 1px 2px rgba(15,17,21,.04),0 4px 14px rgba(15,17,21,.06)}
body.legacy .pc::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,transparent,var(--gold-light) 30%,var(--gold) 50%,var(--gold-light) 70%,transparent)}
body.legacy .pc-tag{font-size:9px;letter-spacing:.2em;color:var(--muted);font-weight:700}
body.legacy .pc-name{font-family:var(--f-serif);font-size:15px;font-weight:600;color:var(--wine-dark);line-height:1.5;letter-spacing:.03em}
body.legacy .pc-desc{font-size:13.5px;color:var(--muted);line-height:1.85}
body.legacy .split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px;max-width:var(--measure);margin:0 auto}
@media(max-width:460px){body.legacy .split{grid-template-columns:minmax(0,1fr)}}
body.legacy .split-col{border-radius:6px;padding:18px 16px;display:flex;flex-direction:column;gap:4px}
body.legacy .split-col .k{font-size:10px;letter-spacing:.24em;font-weight:700}
body.legacy .split-col h4{font-family:var(--f-serif);font-size:16px;font-weight:600}
body.legacy .split-col p{font-size:13.5px;line-height:1.85}
body.legacy .split-col.mem{background:#fff;border:1px solid rgba(28,31,37,.12)}
body.legacy .split-col.mem .k{color:var(--muted)}
body.legacy .split-col.mem h4{color:var(--wine-dark)}
body.legacy .split-col.mem p{color:var(--muted)}
body.legacy .split-col.think{background:var(--wine);border:1px solid var(--wine)}
body.legacy .split-col.think .k{color:var(--gold-light)}
body.legacy .split-col.think h4{color:#fff}
body.legacy .split-col.think p{color:rgba(255,255,255,.78)}
body.legacy .levels{list-style:none;margin:0 auto;padding:0;max-width:var(--measure);display:flex;flex-direction:column;gap:8px}
body.legacy .levels li{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid rgba(28,31,37,.16);border-radius:6px;padding:14px 16px}
body.legacy .levels .lv{width:32px;height:32px;border-radius:50%;background:var(--wine);color:var(--gold-light);font-family:Georgia,serif;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
body.legacy .levels li div{min-width:0}
body.legacy .levels h4{font-family:var(--f-serif);font-size:16px;font-weight:600;color:var(--wine-dark)}
body.legacy .levels p{font-size:13.5px;color:var(--muted);line-height:1.85}
body.legacy .thesis{background:var(--wine);color:#fff;padding:44px max(28px,calc((100% - var(--measure))/2));position:relative}
body.legacy .thesis .tag{color:var(--gold-light);display:block;margin-bottom:14px}
body.legacy .thesis p{font-family:var(--f-serif);font-size:clamp(16px,4vw,20px);line-height:2;letter-spacing:.05em;max-width:560px;margin:0}
body.legacy .thesis em{font-style:normal;color:var(--gold-light)}
body.legacy .moat{max-width:var(--measure);margin:0 auto}
body.legacy .moat blockquote{margin:0 0 26px;font-family:var(--f-serif);font-size:clamp(16px,4vw,19px);line-height:2;color:var(--wine-dark);letter-spacing:.04em}
body.legacy .moat blockquote em{font-style:normal;color:var(--gold)}
body.legacy .moat .principles{margin-top:0}
body.legacy .tools{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-width:var(--measure);margin:0 auto;list-style:none;padding:0}
@media(min-width:560px){body.legacy .tools{grid-template-columns:repeat(3,minmax(0,1fr))}}
body.legacy .tools li{background:#fff;border:1px solid rgba(28,31,37,.16);border-radius:6px;padding:16px 14px;display:flex;flex-direction:column;gap:4px}
body.legacy .tools b{font-family:var(--f-serif);font-size:15px;font-weight:600;color:var(--wine-dark)}
body.legacy .tools span{font-size:13px;color:var(--muted);line-height:1.65}
body.legacy .tools li.core{grid-column:1/-1;background:var(--wine);border-color:var(--wine)}
body.legacy .tools li.core b{color:var(--gold-light);font-size:15px;letter-spacing:.06em}
body.legacy .tools li.core span{color:rgba(255,255,255,.75)}
body.legacy .gal{max-width:var(--measure);margin:0 auto}
body.legacy .gal-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
body.legacy .gal-tabs button{font-family:var(--f-sans);font-size:13px;font-weight:700;letter-spacing:.04em;padding:9px 14px;border-radius:3px;border:1px solid var(--wine-dark);background:#fff;color:var(--wine-dark);cursor:pointer}
body.legacy .gal-tabs button[aria-selected="true"]{background:var(--wine-dark);color:#fff}
body.legacy .gal-note{font-size:14px;color:var(--text);line-height:1.85;margin:0 0 12px}
body.legacy .flowbox{max-width:var(--measure);margin:0 auto}
body.legacy .flowq{font-family:var(--f-serif);font-size:14px;line-height:1.8;color:var(--wine-dark);background:#fff;border:1px solid rgba(28,31,37,.16);border-radius:6px 6px 0 0;border-bottom:none;padding:12px 16px;margin:0}
body.legacy .flowq span{display:inline-block;font-family:var(--f-sans);font-size:10px;letter-spacing:.2em;color:#fff;background:var(--wine);padding:2px 8px;border-radius:2px;margin-right:10px}
body.legacy .flowchart{max-width:var(--measure);margin:0 auto 8px;background:#0f1115;border:1px solid #0f1115;border-radius:0 0 6px 6px;overflow-x:auto}
body.legacy .flowchart svg{display:block;width:100%;height:auto}
body.legacy .fstg{transition:opacity .5s ease}
body.legacy .flowanim.playing .fstg{opacity:0}
body.legacy .flowanim.playing .fstg.on{opacity:1}
body.legacy .flowanim .fline{stroke-dasharray:600;stroke-dashoffset:0;transition:stroke-dashoffset .8s ease,opacity .2s}
body.legacy .flowanim.playing .fline{stroke-dashoffset:600}
body.legacy .flowanim.playing .fline.on{stroke-dashoffset:0}
body.legacy .flow-legend{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;font-size:12.5px;color:var(--text);margin:10px 0 0}
body.legacy .flow-legend .lg{display:inline-block;width:18px;height:12px;border-radius:3px;margin-right:-8px;vertical-align:middle}
body.legacy .lg.given{background:#2b2e35;border:1.5px solid #9a978f}
body.legacy .lg.derived{background:#2e2618;border:2px solid #c99a52}
body.legacy .lg.answer{background:linear-gradient(#f3d9a8,#c99a52)}
body.legacy .lg.chain{background:#c99a52;border-radius:6px;width:24px}
body.legacy .flow-replay{margin-top:10px;font-family:var(--f-sans);font-weight:700;font-size:12px;letter-spacing:.06em;border:1px solid var(--wine-dark);background:#fff;color:var(--wine-dark);border-radius:3px;padding:8px 14px;cursor:pointer}
body.legacy .flow-replay:hover{background:var(--wine-dark);color:#fff}
body.legacy .demo{max-width:var(--measure);margin:0 auto;background:var(--paper);border:1px solid rgba(176,141,87,.3);border-radius:6px;box-shadow:0 6px 20px rgba(15,17,21,.08);overflow:hidden;position:relative}
body.legacy .demo::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,transparent,#8a6532 18%,#b08d57 35%,#d4ad7e 50%,#b08d57 65%,#8a6532 82%,transparent)}
body.legacy .demo-head{padding:20px 20px 14px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
body.legacy .demo-head .q{font-family:var(--f-serif);font-size:15px;color:var(--wine-dark);line-height:1.8}
body.legacy .fig{background:#fff;padding:4px;border-bottom:1px solid var(--line)}
body.legacy .fig svg{display:block;width:100%;height:auto;max-width:100%}
body.legacy .step-body{padding:18px 20px;display:flex;flex-direction:column;gap:10px;min-height:200px}
body.legacy .chain{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-weight:700;font-size:13px}
body.legacy .chip{padding:3px 10px;border-radius:999px}
body.legacy .chip.n{background:var(--blue-wash);color:var(--blue)}
body.legacy .chip.r{background:var(--ochre-wash);color:var(--ochre)}
body.legacy .arrow{color:var(--muted)}
body.legacy .chain-id{font-family:var(--f-mono);font-size:11px;color:var(--gold-ink);margin-left:auto}
body.legacy #c-ja{font-size:11.5px;color:var(--muted)}
body.legacy #c-text{font-size:14px;color:var(--text);line-height:1.9}
body.legacy .eq{font-family:var(--f-mono);font-size:13px;background:var(--cream);border:1px solid var(--line);border-radius:4px;padding:8px 12px;white-space:pre-wrap;overflow-x:auto;color:var(--wine-dark)}
body.legacy .controls{display:flex;align-items:center;gap:8px;padding:0 20px 18px;flex-wrap:wrap}
body.legacy .controls button{font-family:var(--f-sans);font-weight:700;font-size:12px;letter-spacing:.06em;border:1px solid var(--wine-dark);background:#fff;color:var(--wine-dark);border-radius:3px;padding:8px 14px;cursor:pointer}
body.legacy .controls button.primary{background:var(--wine-dark);color:#fff}
body.legacy .controls button.primary:hover{background:var(--gold);border-color:var(--gold)}
body.legacy .controls button:disabled{opacity:.35;cursor:default}
body.legacy .dots{display:flex;gap:6px;margin-left:auto}
body.legacy .dots button{width:30px;height:30px;padding:0;border-radius:50%;font-family:Georgia,serif;font-size:13px}
body.legacy .dots button[aria-current="step"]{background:var(--wine);border-color:var(--wine);color:var(--gold-light)}
body.legacy .demo-foot{font-size:13px;color:var(--muted);padding:0 20px 16px;line-height:1.7}
@media (prefers-reduced-motion:no-preference){body.legacy .fig svg .stage-in{animation:draw .5s ease-out both}
@keyframes draw{from{opacity:.25}to{opacity:1}}}
body.legacy .anim-frame{position:relative;width:100%;aspect-ratio:16/11;border-radius:6px;overflow:hidden;background:#111315;box-shadow:0 10px 30px rgba(15,17,21,.25)}
body.legacy .anim-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
body.legacy .anim-cap{font-size:12.5px;color:var(--muted);margin-top:8px}
body.legacy .anim-cap a{color:var(--gold-ink);font-weight:700;margin-left:6px}
body.legacy .track{max-width:var(--measure);margin:0 auto;display:flex;flex-direction:column;gap:22px}
body.legacy .track-group .tag{display:block;margin-bottom:8px}
body.legacy .track-note{font-size:13px;color:var(--muted);line-height:1.8;margin:0 0 10px}
body.legacy .results{max-width:var(--measure);margin:0 auto;list-style:none;padding:0;display:flex;flex-direction:column;background:#fff;border:1px solid rgba(176,141,87,.3);border-radius:6px}
body.legacy .results li{padding:14px 18px;border-bottom:1px solid var(--line);font-size:15px;color:var(--wine-dark);font-family:var(--f-serif);line-height:1.7}
body.legacy .results li:last-child{border-bottom:none}
body.legacy .results li span{display:block;font-family:var(--f-sans);font-size:13px;color:var(--muted)}
body.legacy .results li.key{background:var(--wine);color:#fff;border-bottom-color:var(--wine)}
body.legacy .results li.key span{color:rgba(255,255,255,.75)}
body.legacy .footer-cta{background:var(--wine-dark);padding:56px max(24px,calc((100% - var(--measure))/2));position:relative;overflow:hidden;box-shadow:inset 0 10px 36px rgba(0,0,0,.35)}
body.legacy .footer-cta > *{position:relative}
body.legacy .rule{width:32px;height:1px;background:var(--gold);margin:0 0 18px}
body.legacy .footer-cta h2{font-family:var(--f-serif);font-size:clamp(18px,4.4vw,24px);color:#fff;font-weight:600;letter-spacing:.06em;line-height:1.6;margin-bottom:12px}
body.legacy .footer-cta p{font-size:12.5px;color:rgba(255,255,255,.82);letter-spacing:.04em;line-height:1.95;max-width:520px;margin:0 0 22px}
body.legacy .mail-cta{display:flex;flex-direction:column;align-items:flex-start;gap:12px;max-width:var(--measure);margin:4px auto 0}
body.legacy .mail-btn{display:inline-flex;align-items:center;gap:10px;background:var(--gold);color:#fff;font-weight:700;font-size:16px;letter-spacing:.06em;padding:16px 28px;border-radius:4px;text-shadow:0 1px 2px rgba(0,0,0,.25);box-shadow:0 8px 24px rgba(0,0,0,.35);transition:background .2s,transform .2s}
body.legacy .mail-btn:hover{background:var(--gold-light);transform:translateY(-2px)}
body.legacy .mail-sub{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
body.legacy .mail-addr{font-family:var(--f-mono);font-size:15px;color:#fff;user-select:all;word-break:break-all}
body.legacy .mail-sub button{background:transparent;border:1px solid rgba(212,173,126,.6);color:var(--gold-light);font-size:12px;font-weight:700;letter-spacing:.06em;padding:6px 12px;border-radius:3px;cursor:pointer}
body.legacy .mail-sub button:hover{background:rgba(212,173,126,.12)}
body.legacy .footer-cta p.mail-msg{font-size:11.5px;margin:0;min-height:1.2em;color:var(--gold-light)}
body.legacy .foot{background:var(--wine-deep);color:rgba(255,255,255,.5);font-size:11px;letter-spacing:.06em;padding:22px 20px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
@media (max-width:600px){body.legacy section{padding:44px 16px}}
body.legacy .b{fill:none;stroke:#222;stroke-width:2.8;stroke-linecap:round}
body.legacy .a1{fill:none;stroke:#2477a4;stroke-width:3.5;stroke-linejoin:round;stroke-linecap:round}
body.legacy .a2{fill:none;stroke:#9a6100;stroke-width:3.5;stroke-linejoin:round;stroke-linecap:round}
body.legacy text{font-family:-apple-system,BlinkMacSystemFont,Arial,sans-serif;text-anchor:middle;dominant-baseline:middle}
body.legacy .t1{fill:#175b83;font-size:21px;font-weight:700}
body.legacy .t2{fill:#9a6100;font-size:21px;font-weight:700}
body.legacy .t3{fill:#263b4a;font-size:22px;font-weight:700}
body.legacy .pt{fill:#222;font-size:16px}
/* adjustments for the new site’s nav/footer/contact form on the dark palette */
body.legacy .foot{background:var(--wine-deep)}
body.legacy .cform{background:#fff;color:var(--ink)}
body.legacy .footer-cta .cform label,body.legacy .footer-cta .cform-note,body.legacy .footer-cta .cform-msg{color:var(--ink)}
body.legacy .hero-copy .os-name{display:block;font-size:11px;letter-spacing:.3em;color:var(--gold-light);font-weight:700;margin-bottom:14px}
body.legacy .hero-copy h1.diff{margin-top:0}

/* root cause: three causes stacked, key on the left (added 2026-10-19) */
@media(min-width:560px){
  body.legacy .two-causes.three{grid-template-columns:minmax(0,1fr);gap:12px}
  body.legacy .two-causes.three .tc{display:grid;grid-template-columns:64px minmax(0,1fr);column-gap:20px;row-gap:4px;align-items:start;padding:18px 20px}
  body.legacy .two-causes.three .tc .tc-k{grid-row:1/3;padding-top:4px}
  body.legacy .two-causes.three .tc h4{grid-column:2;margin:0}
  body.legacy .two-causes.three .tc p{grid-column:2;margin:0}
}

/* numbered lists: no outer frame, connector line centred on the numbers (2026-10-19) */
body.legacy .levels{position:relative;gap:12px}
body.legacy .levels li{border:none;box-shadow:none;background:transparent;padding:4px 0;border-radius:0}
body.legacy .levels .lv{position:relative;z-index:1;width:34px;height:34px;background:#fff;border:1px solid var(--wine-dark);color:var(--wine-dark);box-shadow:0 0 0 5px #fff}
body.legacy section.bg-gray .levels .lv{box-shadow:0 0 0 5px var(--gray)}
body.legacy .levels li div{background:#fff;border:1px solid rgba(28,31,37,.14);border-radius:4px;padding:14px 18px;flex:1}

/* connector line drawn per item, from one number centre to the next (ends exactly at the last number) */
body.legacy .levels::before{display:none}
body.legacy .levels li{position:relative}
body.legacy .levels li::before{content:"";position:absolute;left:17px;top:21px;bottom:-33px;width:1px;background:rgba(26,36,51,.25)}
body.legacy .levels li:last-child::before{display:none}
/* cycle diagrams redrawn in the site's flowchart style: both cards light */
body.legacy .cycle-card.vic,body.legacy .cycle-card.vir{background:#fff;border-color:rgba(26,36,51,.14)}
body.legacy .cycle-card figcaption{color:#1a2433;border-bottom:1px solid rgba(26,36,51,.08);font-family:var(--f-serif);letter-spacing:.04em;font-size:13px}
body.legacy .cycle-card.vic figcaption,body.legacy .cycle-card.vir figcaption{color:#1a2433}
body.legacy .cycle-card.vic{background:#edeae3}
body.legacy .cycle-card.vic figcaption{color:#3b4350;border-bottom-color:rgba(26,36,51,.1)}