:root{--bg-canvas:#ffffff;--bg-surface:#ffffff;--bg-surface-hover:#faf5ff;--bg-band:#f1f5f9;--text-primary:#1e293b;--text-muted:#475569;--accent-primary:#9333ea;--accent-secondary:#e11d48;--accent-deep:#6b21a8;--accent-pale:#f3e8ff;--border-subtle:#e2e8f0;--ease-kinetic:cubic-bezier(0.16,1,0.3,1);--shadow-elevation:0 12px 32px -4px rgba(0,0,0,0.25);--glow-accent:0 0 24px -4px var(--accent-primary);--glass-backdrop:blur(16px) saturate(180%);--r:20px;--serif:Georgia,"Times New Roman",serif;--sans:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
*{box-sizing:border-box}
body{margin:0;font:1.0625rem/1.65 var(--sans);color:var(--text-primary);background:var(--bg-canvas);overflow-wrap:anywhere;hyphens:auto}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.15;margin:0 0 .6em;overflow-wrap:anywhere;hyphens:auto;color:var(--text-primary)}
h2{font-size:clamp(1.7rem,3.4vw,2.4rem)}h3{font-size:1.3rem}
p{margin:0 0 1em}
a{color:var(--accent-deep);text-underline-offset:3px}a:hover{color:var(--accent-primary)}
:focus-visible{outline:3px solid var(--accent-primary);outline-offset:3px;border-radius:6px}
img{max-width:100%;height:auto;display:block}
.skip{position:absolute;left:-9999px;top:0}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.5rem 1rem;z-index:50;border-radius:10px}
.wrap{max-width:1200px;margin:0 auto;padding:0 1.25rem}
.prose{max-width:70ch;margin:0 auto}
.prose ul,.prose ol{padding-left:1.25rem}.prose li{margin-bottom:.4rem}
.muted{color:var(--text-muted)}.small{font-size:.9rem}
.kicker{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-deep);background:var(--accent-pale);padding:.3rem .7rem;border-radius:999px;margin-bottom:1rem}
/* header */
.site-header{position:relative;z-index:30;margin:16px;background:#fff;border:1px solid var(--border-subtle);border-radius:999px;padding:.55rem .7rem .55rem 1rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{display:flex;align-items:center;gap:.55rem;text-decoration:none;color:var(--text-primary);font-family:var(--serif);font-weight:700;font-size:1.1rem;margin-right:auto}
.brand:hover{color:var(--accent-deep)}
.brand-mark{flex:none;width:34px;height:34px;border-radius:11px;background:var(--accent-primary);color:#fff;display:grid;place-items:center;font-size:1.05rem;border:2px solid var(--text-primary)}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:.2rem}
.nav a{display:block;padding:.45rem .9rem;border-radius:999px;text-decoration:none;color:var(--text-primary);font-weight:500;font-size:.95rem;transition:background .25s,color .25s}
.nav a:hover,.nav a[aria-current=page]{background:var(--accent-pale);color:var(--accent-deep)}
.menu-btn{display:none;place-items:center;width:42px;height:42px;border-radius:50%;border:1px solid var(--border-subtle);background:#fff;font-size:1.5rem;line-height:1;color:var(--text-primary);cursor:pointer}
.menu-btn:hover{background:var(--accent-pale)}
/* hero */
.hero,.page-hero{position:relative;overflow:hidden;margin:0 16px;border-radius:var(--r);background-image:radial-gradient(rgba(147,51,234,.16) 1px,transparent 1.6px),linear-gradient(135deg,#f3e8ff 0%,#ffffff 50%,#faf5ff 75%,#f3e8ff 100%);background-size:18px 18px,200% 200%;animation:gradientShift 12s ease infinite;padding:clamp(3.5rem,9vw,7rem) 0}
.page-hero{padding:clamp(2.5rem,6vw,4.5rem) 0}
.hero::before,.page-hero::before{content:"";position:absolute;width:340px;height:340px;right:-80px;top:-90px;border-radius:50%;background:radial-gradient(circle,rgba(147,51,234,.22),transparent 70%);animation:floatOrb 14s ease-in-out infinite;pointer-events:none}
.hero::after{content:"";position:absolute;width:260px;height:260px;left:-60px;bottom:-110px;border-radius:50%;background:radial-gradient(circle,rgba(225,29,72,.12),transparent 70%);animation:floatOrb 16s ease-in-out infinite reverse;pointer-events:none}
.hero .wrap,.page-hero .wrap{position:relative;z-index:1}
.hero h1{font-size:clamp(2.5rem,6.6vw,5.2rem);max-width:17ch;letter-spacing:-.01em}
.page-hero h1{font-size:clamp(2.2rem,5.2vw,3.9rem);max-width:20ch}
.lead{font-size:clamp(1.1rem,1.8vw,1.3rem);color:var(--text-muted);max-width:60ch}
.actions{display:flex;flex-wrap:wrap;gap:1rem;margin-top:1.75rem}
@keyframes gradientShift{0%,100%{background-position:0 0,0% 50%}50%{background-position:0 0,100% 50%}}
@keyframes floatOrb{0%,100%{transform:translate(0,0)}50%{transform:translate(-30px,30px)}}
/* sections */
.section{padding:clamp(2.75rem,6vw,4.75rem) 0}
.band{background:var(--bg-band);margin:0 16px;border-radius:var(--r)}
.dots{background-image:radial-gradient(rgba(100,116,139,.28) 1px,transparent 1.6px);background-size:18px 18px}
.sec-head{max-width:64ch;margin-bottom:2rem}
.sec-head p{color:var(--text-muted)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:1rem}
.stat{background:#fff;border:1px solid var(--border-subtle);border-radius:var(--r);padding:1.3rem 1.4rem}
.stat b{display:block;font-family:var(--serif);font-size:2.5rem;line-height:1;color:var(--accent-primary);margin-bottom:.5rem}
.stat span{display:block;font-weight:600}
.stat small{display:block;color:var(--text-muted);margin-top:.35rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem}
.card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--r);padding:1.5rem;transition:transform .5s var(--ease-kinetic),border-color .3s,background .3s}
.card:hover{transform:translateY(-5px) scale(1.015);border-color:#c4b5fd;background:var(--bg-surface-hover)}
.card h3 a{text-decoration:none;color:inherit}.card h3 a:hover{color:var(--accent-deep)}
.split{display:grid;grid-template-columns:1.15fr 1fr;gap:2.25rem;align-items:center}
.panel{background:#fff;border:1px solid var(--border-subtle);border-radius:var(--r);padding:clamp(1.25rem,3vw,2.25rem)}
.media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r);border:1px solid var(--border-subtle);background:var(--bg-band)}
.media.banner img{aspect-ratio:16/9}
.media.thumb img{aspect-ratio:1/1;max-width:160px}
.media figcaption{font-size:.88rem;color:var(--text-muted);margin-top:.5rem}
figure{margin:0}
/* buttons */
.btn{display:inline-block;background:var(--accent-primary);color:#fff;text-decoration:none;font:inherit;font-weight:600;padding:.8rem 1.4rem;border:2px solid var(--text-primary);border-radius:12px;box-shadow:4px 4px 0 var(--text-primary);transition:transform .2s var(--ease-kinetic),box-shadow .2s var(--ease-kinetic);cursor:pointer;line-height:1.3}
.btn:hover{box-shadow:0 0 0 var(--text-primary);transform:translate(4px,4px);color:#fff}
.btn.alt{background:#fff;color:var(--text-primary)}.btn.alt:hover{color:var(--text-primary)}
/* tabs */
.tabs{border:1px solid var(--border-subtle);border-radius:var(--r);background:#fff;overflow:hidden}
.tablist{display:flex;flex-wrap:wrap;gap:.3rem;padding:.5rem;background:var(--bg-band);border-bottom:1px solid var(--border-subtle)}
.tablist [role=tab]{border:0;background:transparent;padding:.6rem 1.05rem;border-radius:12px;font:inherit;font-weight:600;font-size:.95rem;color:var(--text-muted);cursor:pointer}
.tablist [role=tab]:hover{color:var(--accent-deep)}
.tablist [role=tab][aria-selected=true]{background:#fff;color:var(--accent-deep);box-shadow:inset 0 -3px 0 var(--accent-primary)}
.tabpanel{padding:clamp(1.25rem,3vw,2rem)}
.tabpanel ul{padding-left:1.2rem}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0 0;padding:0;list-style:none}
.chips li{background:var(--accent-pale);color:var(--accent-deep);border-radius:999px;padding:.25rem .75rem;font-size:.88rem;font-weight:600}
/* accordion */
.acc{border:1px solid var(--border-subtle);border-radius:var(--r);background:#fff;margin-bottom:.75rem;transition:border-color .3s}
.acc[open]{border-color:#c4b5fd}
.acc summary{padding:1rem 1.25rem;cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:1rem;align-items:center}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{content:"+";color:var(--accent-primary);font-size:1.4rem;line-height:1;flex:none}
.acc[open] summary::after{content:"−"}
.acc-body{padding:0 1.25rem 1.15rem;color:var(--text-primary)}
/* glossary */
.gloss{background:#fff;border:1px solid var(--border-subtle);border-left:5px solid var(--accent-primary);border-radius:var(--r);padding:1.3rem 1.4rem}
.gloss h3{margin-bottom:.3rem}
.gloss .why{font-size:.93rem;color:var(--text-muted);margin:0}
.gloss .why strong{color:var(--accent-deep)}
/* table */
.table-wrap{overflow-x:auto;border:1px solid var(--border-subtle);border-radius:var(--r);background:#fff}
table{width:100%;border-collapse:collapse;min-width:520px}
th,td{padding:.85rem 1.1rem;border-bottom:1px solid var(--border-subtle);text-align:left;vertical-align:top}
th{background:var(--bg-band);font-family:var(--serif);font-size:1.05rem}
tr:last-child td{border-bottom:0}
/* callout */
.note{border:1px dashed #c4b5fd;background:var(--bg-surface-hover);border-radius:var(--r);padding:1.1rem 1.3rem;margin:1.5rem 0}
.cta-panel{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1.5rem}
/* forms / tool */
.field{margin-bottom:1rem}
label{display:block;font-weight:600;margin-bottom:.35rem}
input,select,textarea{width:100%;padding:.7rem .85rem;border:1px solid #cbd5e1;border-radius:12px;font:inherit;color:var(--text-primary);background:#fff}
textarea{min-height:160px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px rgba(147,51,234,.2)}
pre.preview{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--bg-band);border:1px solid var(--border-subtle);border-radius:14px;padding:1rem 1.1rem;font:.92rem/1.6 ui-monospace,Menlo,Consolas,monospace;min-height:11rem;margin:0 0 1.25rem}
.status{min-height:1.5em;color:var(--accent-deep);font-weight:600;margin-top:1rem}
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
.toc{list-style:none;padding:0;margin:1.5rem 0 0;display:flex;flex-wrap:wrap;gap:.5rem}
.toc a{display:inline-block;padding:.35rem .85rem;border:1px solid var(--border-subtle);background:#fff;border-radius:999px;text-decoration:none;font-size:.9rem;font-weight:600}
.toc a:hover{border-color:var(--accent-primary)}
/* footer */
.site-footer{margin:16px;background:var(--bg-band);border:1px solid var(--border-subtle);border-radius:var(--r);padding:2.5rem clamp(1.25rem,3vw,2.5rem) 1.5rem}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem}
.foot-grid p{color:var(--text-muted);font-size:.93rem;max-width:52ch}
.foot-h{font-size:1rem;margin-bottom:.75rem}
.site-footer ul{list-style:none;margin:0;padding:0}.site-footer li{margin-bottom:.45rem}
.site-footer a{color:var(--text-primary)}.site-footer a:hover{color:var(--accent-deep)}
.foot-legal{display:flex;flex-wrap:wrap;gap:.5rem 1.4rem;border-top:1px solid #cbd5e1;margin-top:2rem;padding-top:1.1rem;font-size:.93rem}
.copy{margin:.9rem 0 0;font-size:.88rem;color:var(--text-muted)}
/* reveal */
.js .reveal{opacity:0;transform:translateY(24px)}
.js .reveal.reveal-visible{opacity:1;transform:translateY(0);transition:all .7s var(--ease-kinetic)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.js .reveal{opacity:1;transform:none}}
/* breakpoints */
@media (min-width:1025px){.hero h1{max-width:15ch}}
@media (max-width:1024px){.split{gap:1.5rem}.foot-grid{grid-template-columns:1.5fr 1fr 1fr}}
@media (max-width:768px){
.menu-btn{display:grid}
.site-header{border-radius:28px}
.nav{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border:1px solid var(--border-subtle);border-radius:var(--r);padding:.6rem;opacity:0;visibility:hidden;transform:translateY(-10px);transition:opacity .3s var(--ease-kinetic),transform .3s var(--ease-kinetic),visibility .3s}
.nav.open{opacity:1;visibility:visible;transform:translateY(0)}
.nav ul{flex-direction:column}.nav a{padding:.75rem 1rem;border-radius:12px;font-size:1.02rem}
.split{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr 1fr}.foot-grid>div:first-child{grid-column:1/-1}
}
@media (max-width:480px){
body{font-size:1rem}
.brand{font-size:.95rem}.brand-mark{width:30px;height:30px}
.site-header,.site-footer{margin:10px}.hero,.page-hero,.band{margin:0 10px}
.foot-grid{grid-template-columns:1fr}
.stat b{font-size:2.1rem}
.tablist [role=tab]{flex:1 1 45%}
}