:root{--bg:#fbfaf7;--fg:#1d2433;--muted:#5b6475;--line:#e3e0d8;--card:#ffffff;--accent:#14213d;--gold:#b7791f;--link:#1f5fa8;--code:#f2f0ea}
@media (prefers-color-scheme:dark){:root{--bg:#0f1420;--fg:#e7e9ee;--muted:#a3abbb;--line:#273044;--card:#161d2c;--accent:#e7e9ee;--gold:#f2b134;--link:#8ecae6;--code:#1c2436}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.65 Georgia,"Iowan Old Style","Palatino Linotype",serif}
h1,h2,h3,h4,.brand,nav,.btn,.eyebrow,table,footer{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
h1{font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.15;margin:.2em 0 .4em}
h2{font-size:1.45rem;margin:2em 0 .5em;line-height:1.25}h3{font-size:1.15rem;margin:1.5em 0 .4em}
a{color:var(--link)}a:hover{text-decoration-thickness:2px}
.wrap{max-width:980px;margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;background:var(--card);padding:6px 10px;z-index:10}
header.site{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:5}
.bar{display:flex;align-items:center;gap:16px;min-height:60px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--fg);text-decoration:none;font-size:1.05rem}
nav{display:flex;flex-wrap:wrap;gap:4px 14px;margin-left:auto;font-size:.92rem}
nav a{color:var(--muted);text-decoration:none;padding:4px 0}nav a:hover,nav a[aria-current]{color:var(--fg);border-bottom:2px solid var(--gold)}
@media (max-width:820px){nav{margin-left:0;width:100%;padding:2px 0 10px;gap:2px 16px}nav a{padding:8px 0}}
main{padding:28px 16px 60px}
.hero{padding:28px 0 8px}.eyebrow{color:var(--gold);font-weight:600;letter-spacing:.04em;text-transform:uppercase;font-size:.8rem;margin:0}
.lede{font-size:1.2rem;color:var(--fg);max-width:46em}.lede.small{font-size:1.05rem;color:var(--muted)}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}
.btn{display:inline-block;background:var(--accent);color:var(--bg);padding:10px 18px;border-radius:10px;text-decoration:none;font-weight:600}
.btn.ghost{background:none;color:var(--fg);border:1px solid var(--line)}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:28px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px}.card h3,.card h2{margin-top:0}.card h2{font-size:1.15rem}
.predict{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:12px;padding:4px 22px 10px;margin:32px 0}
table{border-collapse:collapse;width:100%;font-size:.92rem;margin:1em 0;display:block;overflow-x:auto}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--muted);font-weight:600}
table.results{display:table}
@media (max-width:600px){table.results{display:block}}
.files code{font-size:.72rem;word-break:break-all}
code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--code);border-radius:6px}
code{padding:1px 5px;font-size:.88em}pre{padding:14px;overflow-x:auto;font-size:.8rem;line-height:1.45}
.eq{font-family:"Cambria Math","STIX Two Math",Georgia,serif;font-size:1.1rem;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;overflow-x:auto;line-height:1.9}
.principles li{margin:.6em 0}
.doc{max-width:46em}.dl{font-family:system-ui,sans-serif;font-size:.92rem}
.toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:6px 20px 12px;margin:20px 0 28px;font-family:system-ui,sans-serif;font-size:.9rem}
.toc ul{padding-left:1.1em;margin:.2em 0}.toc h2{font-size:1rem;margin:.8em 0 .3em}
.note{color:var(--muted);font-size:.92rem}
blockquote{border-left:3px solid var(--line);margin:1em 0;padding:.2em 1em;color:var(--muted)}
footer.site{border-top:1px solid var(--line);color:var(--muted);font-size:.85rem;padding:18px 0 30px}
img{max-width:100%;height:auto}
@media print{header.site,footer.site,.cta{display:none}body{background:#fff;color:#000}}

.idea{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:4px 22px 14px;margin:26px 0}.idea h2{margin-top:.9em}
.layer-label{font-family:system-ui,sans-serif;font-size:.78rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--gold);margin:1.1em 0 .2em}
.idea details{border-top:1px solid var(--line);padding:8px 0}.idea summary{cursor:pointer;font-family:system-ui,sans-serif;font-weight:600;font-size:.95rem}
.status{font-size:.95rem;color:var(--muted);border-top:1px solid var(--line);padding-top:10px}
.tag{display:inline-block;font-family:system-ui,sans-serif;font-size:.75rem;font-weight:600;border-radius:999px;padding:2px 9px;border:1px solid var(--line);white-space:nowrap}
.tag-own{background:#e8f3e8;color:#1b5e20;border-color:#b7d8b7}.tag-others{background:#e8eef9;color:#1a3d78;border-color:#b9c8e6}.tag-mixed{background:#fdf3de;color:#7a4b00;border-color:#ecd49b}
@media (prefers-color-scheme:dark){.tag-own{background:#16301a;color:#9bd6a0;border-color:#2c5a31}.tag-others{background:#16233d;color:#9db8ee;border-color:#2d4575}.tag-mixed{background:#3a2b0e;color:#f2c978;border-color:#6b5120}}
table.originals{display:block;overflow-x:auto;font-size:.85rem}table.originals td:nth-child(3){min-width:16em}
.badge{display:inline-block;font-family:system-ui,sans-serif;font-size:.78rem;font-weight:700;letter-spacing:.03em;border-radius:6px;padding:2px 9px;border:1px solid var(--line);white-space:nowrap}
.badge-pass{background:#e3f4e5;color:#14541b;border-color:#9fd0a5}.badge-fail{background:#fbe5e3;color:#8a1c14;border-color:#e3a39e}
.badge-partial{background:#fdf1d6;color:#7a4b00;border-color:#e6cb8a}.badge-nty{background:#e8eaf0;color:#3a4256;border-color:#c3c8d6}
.badge-input,.badge-inherited{background:#e6eefb;color:#1a3d78;border-color:#b3c6e6}.badge-norerun{background:#f0e9f7;color:#4c2a78;border-color:#cdb9e6}
@media (prefers-color-scheme:dark){.badge-pass{background:#14301a;color:#9bd6a0;border-color:#2c5a31}.badge-fail{background:#3b1714;color:#f1a29b;border-color:#7a2f29}.badge-partial{background:#3a2b0e;color:#f2c978;border-color:#6b5120}.badge-nty{background:#232838;color:#b9c1d6;border-color:#3d4560}.badge-input,.badge-inherited{background:#16233d;color:#9db8ee;border-color:#2d4575}.badge-norerun{background:#2a1f3b;color:#cdb0f0;border-color:#4d3a73}}
article.check{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:6px 18px 12px;margin:18px 0}
article.check header{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;justify-content:space-between}
article.check h3{margin:.6em 0 .3em;font-size:1.05rem}
article.check .eq{font-size:.95rem;padding:10px 12px;margin:.4em 0}
dl.calc{display:grid;grid-template-columns:7.5em 1fr;gap:6px 14px;margin:.6em 0;font-family:system-ui,sans-serif;font-size:.9rem}
dl.calc dt{color:var(--muted);font-weight:600}dl.calc dd{margin:0;overflow-wrap:anywhere}
@media (max-width:600px){dl.calc{grid-template-columns:1fr}dl.calc dd{margin-bottom:.4em}}
table.summary{display:table;width:auto}table.summary td,table.summary th{padding:6px 14px}
.toc li{margin:.35em 0;line-height:1.9}
pre.src{max-height:34em}pre.src code{background:none;padding:0;white-space:pre}
.codeblock{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:6px 18px 14px;margin:20px 0}
@media (max-width:820px){header.site{position:static}}