:root{
  /* Brand */
  --primary:#4C1D95;--primary-deep:#3B0764;--primary-soft:#7C3AED;--accent-mist:#EDE9FE;
  /* Backgrounds & surfaces */
  --bg:#FCFBFF;--surface:#FFFFFF;--surface-soft:#F8F5FF;--surface-subtle:#F3EEFF;
  /* Text */
  --text:#1F1630;--text-strong:#140F22;--text-secondary:#5B556B;--muted:#7A748C;
  /* Borders & lines */
  --line:#DDD6FE;--border-strong:#C4B5FD;--divider:#ECE7F7;--hairline:#EEEAF8;
  /* Semantic states */
  --preserved:#4C1D95;--drift:#B45309;--broken:#9F1239;--info:#5B21B6;
  /* Interaction */
  --link:#4C1D95;--link-hover:#3B0764;--focus-ring:rgba(76,29,149,.22);--selection-bg:#EDE9FE;
  /* Legacy aliases kept so existing class rules resolve to the new palette */
  --surface2:var(--surface-soft);--signal:var(--primary);--warm:var(--text-secondary);
  --max:1160px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.7 ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
::selection{background:var(--selection-bg);color:var(--primary-deep)}
:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus-ring);border-radius:4px}
a{color:var(--link);text-decoration-color:var(--border-strong);text-underline-offset:3px}a:hover{color:var(--link-hover);text-decoration-color:var(--primary)}
.wrap{width:min(var(--max),calc(100% - 40px));margin:auto}
.site-head{position:sticky;top:0;z-index:10;background:rgba(252,251,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--divider)}
.head-inner{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:24px}
.brand{text-decoration:none;font-weight:760;letter-spacing:.08em;color:var(--primary-deep)}.brand span{color:var(--primary)}
nav{display:flex;gap:20px;flex-wrap:wrap}nav a{text-decoration:none;color:var(--text-secondary);font-size:.94rem}nav a[aria-current="page"],nav a:hover{color:var(--primary-deep)}
main{padding:72px 0 96px}
.hero{padding:44px 0 52px;border-bottom:1px solid var(--divider)}
.kicker{font-size:.78rem;text-transform:uppercase;letter-spacing:.16em;color:var(--primary);font-weight:700}
.display{font-size:clamp(3rem,8vw,7.4rem);line-height:.92;letter-spacing:-.055em;margin:.25em 0 .18em;color:var(--primary-deep)}
.expansion{font-size:clamp(1.15rem,2vw,1.6rem);color:var(--text-secondary);max-width:840px}
.lede{font-size:clamp(1.22rem,2.2vw,1.75rem);max-width:900px;line-height:1.42;margin-top:38px}
.splitmark{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin:42px 0 10px}
.splitmark div{background:var(--surface);padding:20px 14px;min-height:118px}.splitmark b{display:block;font-size:2rem;color:var(--primary)}.splitmark small{color:var(--muted)}
article{max-width:860px;padding-top:48px}
h1{font-size:clamp(2.5rem,6vw,5.4rem);line-height:.98;letter-spacing:-.045em;margin:.3em 0;color:var(--text-strong)}
h2{font-size:clamp(1.7rem,3vw,2.45rem);line-height:1.16;letter-spacing:-.025em;margin:2.2em 0 .7em;color:var(--text-strong)}
h3{font-size:1.18rem;margin:2em 0 .4em;color:var(--text-strong)}
p,li{color:var(--text)}strong{color:var(--text-strong)}
blockquote{margin:32px 0;padding:24px 28px;border-left:3px solid var(--primary);background:var(--surface-soft);font-size:1.18rem;color:var(--text)}
code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
code{color:var(--primary-deep)}
pre{overflow:auto;background:var(--surface-subtle);border:1px solid var(--line);padding:20px;border-radius:10px;color:var(--text-primary,var(--text))}
.note{border:1px solid var(--line);background:var(--surface-subtle);padding:20px 22px;margin:24px 0}.note .label{font-size:.76rem;text-transform:uppercase;letter-spacing:.14em;color:var(--primary);font-weight:750}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.card{border:1px solid var(--line);background:var(--surface);padding:22px}.card h3{margin-top:0}
.muted{color:var(--muted)}
table{width:100%;border-collapse:collapse;margin:28px 0;font-size:.93rem}th,td{text-align:left;vertical-align:top;padding:14px 12px;border-bottom:1px solid var(--divider)}th{color:var(--primary);font-weight:700}
.status{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}
.pill{border:1px solid var(--line);background:var(--accent-mist);padding:7px 11px;border-radius:999px;color:var(--primary-deep);font-size:.82rem}
.timeline{border-left:1px solid var(--line);margin:30px 0 30px 8px;padding-left:26px}.timeline section{position:relative;padding:0 0 26px}.timeline section:before{content:"";position:absolute;left:-31px;top:8px;width:9px;height:9px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 5px var(--bg)}
.source-list li{margin-bottom:12px}
.site-foot{border-top:1px solid var(--divider);padding:30px 0 50px;color:var(--muted);font-size:.86rem}
.foot-inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.definition-record{margin-top:48px;border-top:1px solid var(--divider);padding-top:24px}
.anchor{color:var(--muted);font-size:.82rem;text-decoration:none;margin-left:.3rem}.anchor:hover{color:var(--primary)}
@media(max-width:760px){.head-inner{align-items:flex-start;padding:18px 0;flex-direction:column}nav{gap:12px 16px}.splitmark{grid-template-columns:1fr 1fr}.splitmark div:last-child{grid-column:1/-1}.grid2{grid-template-columns:1fr}main{padding-top:38px}.hero{padding-top:20px}table{display:block;overflow-x:auto}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}