:root{
  --paper:#f4f6fa; --ink:#172033; --muted:#55607a; --line:#d9dfea;
  --link:#3946c9; --code-bg:#18202e; --code-ink:#d7deea; --code-dim:#7d8aa3;
  --inject:#e05aa8; --bad:#d9443a; --fooled:#d99a10; --ok:#2e9d6b;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#0f1522; --ink:#e4e9f3; --muted:#9aa6bf; --line:#253049; --link:#8f9cff; --code-bg:#151c2a;
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 "IBM Plex Sans",system-ui,sans-serif}
a{color:var(--link);text-underline-offset:3px}
a:focus-visible,button:focus-visible{outline:3px solid var(--link);outline-offset:3px;border-radius:4px}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header.hero{padding:64px 0 56px;display:grid;grid-template-columns:1fr 1.15fr;gap:48px;align-items:center}
.hero h1{font-weight:600;font-size:clamp(2.2rem,4.6vw,3.3rem);line-height:1.05;letter-spacing:-.02em;margin:0 0 16px}
.hero .who{margin:0 0 20px;color:var(--muted)}
.hero .thesis{font-size:1.2rem;line-height:1.5;margin:0 0 24px;max-width:30ch}
.contact a{margin-right:20px;font-weight:500;display:inline-flex;align-items:center;gap:7px}
.contact svg{width:18px;height:18px;flex:none}
/* demo */
.demo{background:var(--code-bg);color:var(--code-ink);border-radius:14px;padding:22px 22px 18px;box-shadow:0 18px 40px -22px rgba(10,20,50,.55)}
.demo pre{margin:0 0 18px;font:14.5px/1.7 "JetBrains Mono",ui-monospace,monospace;white-space:pre-wrap;word-break:break-word;min-height:7.2em}
.k{color:#8fb4ff}.s{color:#9fd8a8}.inj{color:var(--inject);font-style:italic}
.caret{display:inline-block;width:.55em;background:var(--inject);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.verdict{display:flex;align-items:center;gap:12px;flex-wrap:wrap;border-top:1px solid #2a3449;padding-top:14px;font-size:.95rem}
.badge{font-weight:600;padding:4px 12px;border-radius:999px;transition:background .35s,color .35s}
.badge.bad{background:rgba(217,68,58,.18);color:#ff8a80}
.badge.fooled{background:rgba(217,154,16,.2);color:#ffc85a}
.note{color:var(--code-dim);flex:1 1 220px}
.demo button{font:inherit;font-weight:600;font-size:.9rem;padding:8px 16px;border-radius:999px;border:1px solid #3a4763;background:#222c40;color:#fff;cursor:pointer}
.demo button:hover{background:#2c3852}
.cap{margin:10px 2px 0;font-size:.82rem;color:var(--muted)}
/* sections */
main section{padding:36px 0;border-top:1px solid var(--line)}
main h2{font-size:1.35rem;font-weight:600;margin:0 0 18px;letter-spacing:-.01em}
.cols{display:grid;grid-template-columns:220px 1fr;gap:32px}
.cols h2{margin:0}
.prose p{margin:0 0 12px;max-width:68ch}
.pubs{list-style:none;margin:0;padding:0}
.pubs li{padding:0 0 22px 18px;margin:0 0 22px;border-left:3px solid var(--line)}
.pubs li.live{border-left-color:var(--inject)}
.pubs .t{font-weight:600;display:block;line-height:1.4}
.pubs .v{color:var(--muted);font-size:.93rem;display:block;margin:4px 0 6px}
.pubs .f{display:block;margin:0 0 8px;max-width:68ch}
.pubs .l a{margin-right:16px;font-size:.93rem;font-weight:500}
.plain{margin:0;padding-left:18px}.plain li{margin:0 0 8px}
footer{border-top:1px solid var(--line);padding:24px 0 48px;color:var(--muted);font-size:.85rem}
footer p{max-width:80ch;margin:0}
@media (max-width:820px){header.hero{grid-template-columns:1fr;gap:28px;padding-top:36px}.cols{grid-template-columns:1fr;gap:12px}}
@media (prefers-reduced-motion:reduce){.caret{animation:none}.badge{transition:none}}
/* paper pages */
.paper{max-width:760px;margin:0 auto;padding:40px 20px 64px}
.paper h1{font-size:1.7rem;line-height:1.25;font-weight:600;margin:12px 0}
.paper .v{color:var(--muted)}

/* v3: bold hero band */
.band{background:#23287a;color:#fff;background-image:radial-gradient(circle at 85% 20%,rgba(255,95,174,.28),transparent 45%),radial-gradient(circle at 10% 90%,rgba(80,170,255,.22),transparent 40%)}
.band .who{color:#c9cdf5}.band a{color:#fff}.band .thesis{color:#fff}
.band .cap{color:#b9bfee}
.band .demo{box-shadow:0 30px 60px -25px rgba(0,0,0,.7);border:1px solid rgba(255,255,255,.08)}
.meter{margin-top:16px}
.meter .row{display:flex;justify-content:space-between;font-size:.85rem;color:var(--code-dim);margin-bottom:6px}
.meter .row b{color:#fff;font-variant-numeric:tabular-nums}
.track{height:10px;border-radius:99px;background:#2a3449;overflow:hidden}
.fill{height:100%;width:90%;border-radius:99px;background:var(--ok);transition:width .9s cubic-bezier(.2,.8,.2,1),background .6s}
.fill.drop{background:var(--fooled)}
.pubs .tag{display:inline-block;font-size:.8rem;font-weight:600;padding:2px 10px;border-radius:99px;margin:0 0 6px;background:rgba(224,90,168,.14);color:#b8327f}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .pubs .tag{color:#ff8fc8}}
.pubs .tag.acc{background:rgba(57,70,201,.12);color:var(--link)}
.pubs .tag.pre{background:rgba(46,157,107,.14);color:#1f7a52}
main h2{color:var(--ink)}
main section:first-of-type{border-top:0}
@media (prefers-reduced-motion:reduce){.fill{transition:none}}

.figs{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:6px}
.figs figure{margin:0}
.figs img{width:100%;height:auto;border-radius:12px;border:1px solid #e2e8f0;display:block}
.figs figcaption{font-size:.9rem;color:#64748b;margin-top:8px}
@media(max-width:640px){.figs{grid-template-columns:1fr}}

.svcs{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.svc{display:flex;gap:14px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:14px}
.svc .logo{position:relative;flex:0 0 64px;height:64px;border-radius:10px;background:var(--line);display:flex;align-items:center;justify-content:center;overflow:hidden}
.svc .logo::before{content:attr(data-ph);font-weight:700;font-size:.8rem;color:var(--muted)}
.svc .logo img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;box-sizing:border-box}
.svt{display:flex;flex-direction:column;gap:2px;font-size:.95rem;line-height:1.35}
.svt span{color:var(--muted);font-size:.88rem}
@media(max-width:640px){.svcs{grid-template-columns:1fr}}

.cols.stack{grid-template-columns:1fr}
.cols.stack .pubs{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cols.stack .pubs li{margin:0;padding:24px;border:1px solid var(--line);border-left:1px solid var(--line);border-radius:14px;display:flex;flex-direction:column}
.cols.stack .pubs li.live{border-color:var(--inject)}
.cols.stack .pubs .t{font-size:1rem}
.cols.stack .pubs .l{margin-top:auto;padding-top:6px}
.cols.stack .pubs .tag{align-self:flex-start;margin-bottom:12px}
@media(max-width:980px){.cols.stack .pubs{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.cols.stack .pubs{grid-template-columns:1fr}}
.svc{padding:20px}
.cols.stack .pubs .l a{margin-right:2px}