/* =====================================================================
   Ritangkar Dey — "The Commerce Stack" visual identity
   Ink-black field, blueprint-blue + amber light, Fraunces display / Inter text.
   The page is a fixed WebGL world (assets/js/world.js); content floats above it.
   ===================================================================== */
@font-face{font-family:"Fraunces";src:url(/assets/fonts/fraunces-latin-wght-normal.woff2) format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Fraunces";src:url(/assets/fonts/fraunces-latin-wght-italic.woff2) format("woff2");font-weight:100 900;font-style:italic;font-display:swap}
@font-face{font-family:"Inter";src:url(/assets/fonts/inter-latin-wght-normal.woff2) format("woff2");font-weight:100 900;font-style:normal;font-display:swap}

/* ===== Tokens ===== */
:root{
  --bg:#06080c;--bg2:#0a0d13;--surface:#0e1218;--surface2:#151a23;--line:#1e2530;--line2:#2c3644;
  --glass:rgba(8,11,16,.88);
  --text:#eceff4;--muted:#a5afbe;--faint:#8892a2;
  --blue:#6aa5e0;--blue-lt:#a8cdf3;--amber:#eeaa55;--amber-lt:#f6c985;--green:#62c48e;--red:#ef8f8f;
  --sans:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --serif:"Fraunces","Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  --r:10px;--r-lg:18px;--w:1160px;--gut:clamp(18px,4.2vw,40px);--hdr:68px;
  --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{background:var(--bg);scroll-behavior:smooth;scroll-padding-top:calc(var(--hdr) + 12px);-webkit-text-size-adjust:100%}
html.lenis-on,html.lenis-on body{scroll-behavior:auto!important}
body{margin:0;background:transparent;color:var(--text);font:400 1rem/1.65 var(--sans);overflow-x:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
/* WebGL world + legibility veil (CSS-only fallback when WebGL is missing) */
#world{position:fixed;left:0;top:0;width:100%;height:100vh;height:100lvh;z-index:-3;display:block;background:var(--bg)}
.veil{position:fixed;inset:0;z-index:-2;pointer-events:none;background:radial-gradient(ellipse 85% 75% at 50% 45%,rgba(3,4,7,.25) 30%,rgba(3,4,7,.78) 100%),linear-gradient(180deg,rgba(6,8,12,.6),rgba(6,8,12,.2) 20%,rgba(6,8,12,.2) 75%,rgba(6,8,12,.65))}
html:not(.has-3d) body::before{content:"";position:fixed;inset:0;z-index:-4;background:var(--bg) url(/assets/img/bg.svg) center/cover no-repeat;pointer-events:none}
html.no-3d #world{display:none}
img,svg{max-width:100%;display:block}
a{color:var(--blue-lt);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#fff}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:4px}
::selection{background:var(--amber);color:#000}
h1,h2,h3,h4{line-height:1.15;margin:0;font-weight:600;letter-spacing:-.02em}
p{margin:0 0 1em}
ul{margin:0;padding:0}
.skip{position:absolute;left:-999px;top:8px;background:var(--amber);color:#000;padding:8px 14px;border-radius:6px;z-index:100}
.skip:focus{left:8px}
.wrap{max-width:var(--w);margin:0 auto;padding:0 var(--gut)}
.mono{font-family:var(--mono)}
.serif{font-family:var(--serif);font-style:italic;font-weight:300}
.muted{color:var(--muted)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
/* masked word/char split (motion.js) */
.sw{display:inline-block;overflow:hidden;vertical-align:top;padding:.1em .06em .14em;margin:-.1em -.06em -.14em}
.sc{display:inline-block;will-change:transform}

/* ===== Header ===== */
.hdr{position:fixed;top:0;left:0;right:0;z-index:50;height:var(--hdr);transition:background .35s,border-color .35s,backdrop-filter .35s;border-bottom:1px solid transparent;view-transition-name:site-hdr}
.hdr.scrolled{background:rgba(6,8,12,.92);-webkit-border-bottom-color:var(--line)}
.hdr .wrap{height:100%;max-width:1480px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.sp{position:fixed;top:0;left:0;right:0;height:2px;z-index:60;transform-origin:0 50%;transform:scaleX(var(--p,0));background:linear-gradient(90deg,var(--blue),var(--amber));pointer-events:none}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);text-decoration:none;font:500 1.12rem var(--serif);letter-spacing:-.01em;white-space:nowrap}
.brand i{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--line2);border-radius:50%;color:var(--amber-lt);font:500 11px var(--mono);font-style:normal;letter-spacing:.04em;background:rgba(6,8,12,.5)}
.nav{display:flex;align-items:center;gap:2px}
.nav a{color:var(--muted);text-decoration:none;font-size:.88rem;padding:9px 13px;border-radius:999px;transition:color .2s,background .2s}
.nav a:hover,.nav a[aria-current]{color:#fff;background:rgba(255,255,255,.07)}
.nav .cta{background:var(--text);color:#06080c;font-weight:600;margin-left:8px}
.nav .cta:hover{background:var(--amber-lt);color:#000}
.menu-btn{display:none;background:rgba(6,8,12,.6);border:1px solid var(--line2);color:var(--text);border-radius:999px;padding:9px 16px;font:500 .85rem var(--sans);cursor:pointer}
@media(max-width:860px){
  .menu-btn{display:block}
  .nav{position:fixed;inset:var(--hdr) 0 auto 0;flex-direction:column;align-items:stretch;background:rgba(6,8,12,.98);border-bottom:1px solid var(--line);padding:12px var(--gut) 22px;gap:2px;transform:translateY(-8px);opacity:0;visibility:hidden;transition:.2s}
  .nav.open{transform:none;opacity:1;visibility:visible}
  .nav a{padding:14px 12px;font-size:1.05rem;border-radius:10px}
  .nav .cta{text-align:center;margin:8px 0 0}
}
body:not(.home) main{padding-top:var(--hdr)}

/* ===== Section rail ===== */
.rail{position:fixed;right:clamp(10px,1.8vw,26px);top:50%;transform:translateY(-50%);z-index:40;display:flex;flex-direction:column;gap:2px}
.rail a{position:relative;display:flex;justify-content:flex-end;align-items:center;width:28px;height:28px;text-decoration:none}
.rail a::before{content:"";width:7px;height:7px;border-radius:50%;border:1px solid var(--faint);background:transparent;transition:.3s var(--ease)}
.rail a.on::before{width:9px;height:9px;background:var(--amber);border-color:var(--amber);box-shadow:0 0 14px var(--amber)}
.rail a span{position:absolute;right:30px;font:500 .66rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:#fff;background:rgba(6,8,12,.85);padding:4px 9px;border-radius:999px;border:1px solid var(--line2);opacity:0;transform:translateX(6px);pointer-events:none;transition:.25s var(--ease);white-space:nowrap}
.rail a:hover span,.rail a:focus-visible span{opacity:1;transform:none}
@media(max-width:1000px){.rail{display:none}}
/* ===== Sections ===== */
section{padding:clamp(88px,13vw,170px) 0;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:12px;font:500 .72rem var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--blue-lt);margin-bottom:22px}
.eyebrow::before{content:"";width:34px;height:1px;background:currentColor;opacity:.7}
.eyebrow.ai{color:var(--amber-lt)}
h2{font:300 clamp(2.3rem,5.6vw,4.9rem)/1.02 var(--serif);letter-spacing:-.035em;max-width:17ch;font-variation-settings:"opsz" 144}
.lede{color:#b9c2d0;font-size:clamp(1.02rem,1.5vw,1.2rem);max-width:60ch;margin-top:26px}
.sec-head{position:relative;margin-bottom:clamp(40px,7vw,84px)}
/* soft dark scrim behind every heading block + loose copy so the 3D lines never fight the text */
.sec-head::before,.ph::before{content:"";position:absolute;inset:-48px -7vw -40px -7vw;z-index:-1;background:radial-gradient(ellipse 70% 62% at 32% 50%,rgba(5,7,10,.9),rgba(5,7,10,.55) 55%,transparent 80%);pointer-events:none}
.sec-head,.ph,.lede,.muted,.honest,.byline,.crumb{text-shadow:0 0 14px rgba(5,7,10,.95),0 0 4px rgba(5,7,10,.9)}
.sec-head>*,.ph>*{position:relative}
p.muted{background:linear-gradient(90deg,rgba(5,7,10,.7),transparent 92%);padding:6px 0}
.sec-head .lede,.ph .lede{margin-bottom:0}

/* ===== Buttons / chips ===== */
.btn{position:relative;display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:999px;border:1px solid var(--line2);color:var(--text);text-decoration:none;font-weight:550;font-size:.93rem;background:rgba(9,12,17,.55);-webkit-cursor:pointer;transition:background .25s,border-color .25s,color .25s,transform .35s var(--ease)}
.btn:hover{background:rgba(255,255,255,.1);border-color:var(--faint);color:#fff;transform:translateY(-2px)}
.btn.pri{background:var(--text);color:#06080c;border-color:var(--text)}
.btn.pri:hover{background:var(--amber-lt);border-color:var(--amber-lt);color:#000}
.btn.sm{padding:9px 16px;font-size:.85rem}
.chip{display:inline-block;font:500 .72rem var(--mono);letter-spacing:.04em;padding:3px 10px;border-radius:999px;border:1px solid var(--line2);color:var(--muted);white-space:nowrap}
.chip.wrap{white-space:normal}
.chip.ok{color:var(--green);border-color:rgba(98,196,142,.4)}
.chip.warn{color:var(--amber-lt);border-color:rgba(238,170,85,.45)}
.chip.bad{color:var(--red);border-color:rgba(239,143,143,.45)}
.chip.info{color:var(--blue-lt);border-color:rgba(106,165,224,.45)}
.chip.ai{color:var(--amber-lt);border-color:rgba(238,170,85,.45);background:rgba(238,170,85,.07)}
.tags{display:flex;flex-wrap:wrap;gap:6px;list-style:none}

/* ===== Hero: a tall runway with a sticky stage; scrolling "dives" into the world ===== */
.hero{padding:0;min-height:170vh;min-height:170svh}
.hero-stick{position:sticky;top:0;min-height:100vh;min-height:100svh;display:flex;align-items:center;padding:calc(var(--hdr) + 12px) 0 72px}
.hero-in{position:relative;width:100%;max-width:1480px}
.hero-in::before{content:"";position:absolute;inset:-6% -4% -6% -10%;z-index:-1;background:radial-gradient(ellipse 60% 62% at 28% 50%,rgba(4,5,8,.82),transparent 72%);pointer-events:none}
.hero h1{font:300 clamp(3.1rem,11.6vw,11rem)/.9 var(--serif);letter-spacing:-.05em;color:#fff;margin:0;font-variation-settings:"opsz" 144;perspective:900px}
.hero .role{font:300 clamp(1.3rem,2.8vw,2.5rem)/1.2 var(--serif);letter-spacing:-.02em;margin:clamp(20px,3vw,34px) 0 0;color:var(--text)}
.hero .role .serif{color:var(--amber-lt)}
.hero .sub{color:var(--muted);font-size:clamp(1rem,1.4vw,1.15rem);max-width:56ch;margin:22px 0 14px}
.hero .hnote{color:var(--faint);font-size:.88rem;max-width:56ch;margin:0 0 28px;border-left:2px solid var(--amber);padding-left:14px}
.hero .actions{display:flex;flex-wrap:wrap;gap:10px}
.hero .links{display:flex;flex-wrap:wrap;gap:6px 22px;margin-top:28px;font-size:.9rem}
.hero .links a{color:var(--muted)}
.hero .links a:hover{color:#fff}
.scroll-cue{position:absolute;left:50%;bottom:22px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:10px;font:500 .66rem var(--mono);letter-spacing:.22em;text-transform:uppercase;color:var(--faint);pointer-events:none}
.scroll-cue i{width:1px;height:42px;background:linear-gradient(var(--amber),transparent);transform-origin:50% 0;animation:cue 2.2s var(--ease) infinite}
@keyframes cue{0%{transform:scaleY(0)}50%{transform:scaleY(1)}100%{transform:scaleY(1);opacity:0}}
@media(max-width:700px),(max-height:620px){.hero{min-height:0}.hero-stick{position:relative;min-height:0;padding-bottom:56px}.scroll-cue{display:none}}

/* architecture graph */
.arch{background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(14px,2.4vw,28px);margin:0 0 clamp(36px,6vw,64px);position:relative;-webkit-box-shadow:0 40px 90px -50px rgba(106,165,224,.35)}
.arch svg{width:100%;height:auto}
.arch .cap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font:.72rem var(--mono);color:var(--faint);padding:6px 6px 0}
.arch .node rect{fill:var(--surface2);stroke:var(--line2);stroke-width:1;transition:stroke .15s,fill .15s}
.arch .node text{fill:var(--text);font:600 11.5px var(--sans);pointer-events:none}
.arch .node .s{fill:var(--muted);font:10.5px var(--mono);font-weight:400}
.arch .node.core rect{stroke:var(--blue);fill:#12202f}
.arch .node.ai rect{stroke:var(--amber);fill:#241d12}
.arch .node{cursor:pointer;outline:none}
.arch .node:focus-visible rect{stroke:var(--amber);stroke-width:2.5}
.arch .node:hover rect,.arch .node:focus-visible rect,.arch .node.sel rect{stroke:#fff}
.arch .edge{stroke:var(--line2);stroke-width:1.2;fill:none}
.arch .edge.hot{stroke:var(--blue)}
.arch .edge.ai{stroke:var(--amber)}
.arch .pulse{fill:none;stroke:var(--blue-lt);stroke-width:2.2;stroke-linecap:round;stroke-dasharray:6 120;animation:pulse 3.2s linear infinite}
.arch .pulse.ai{stroke:var(--amber-lt)}
@keyframes pulse{to{stroke-dashoffset:-126}}
.arch .layer{fill:var(--faint);font:10.5px var(--mono);letter-spacing:.06em}
.arch-info{min-height:3.4em;margin:8px 6px 4px;font-size:.88rem;color:var(--muted);border-top:1px solid var(--line);padding-top:10px}
.arch-info b{color:var(--text)}
.arch .arch-m{display:none}
@media(max-width:700px){
  .menu-btn{padding:11px 18px}
  .d-btn,.d-tab,.filters button{min-height:42px;padding-top:10px;padding-bottom:10px}
  .hero .links a{display:inline-flex;align-items:center;min-height:44px}
  footer a{display:inline-block;padding:10px 4px}
  footer .wrap{gap:4px}
  .card p a,.lede a,.muted a{display:inline-block;padding:8px 2px}
}
@media(max-width:600px){.arch .arch-d{display:none}.arch .arch-m{display:block;padding:6px 4px 0}.arch .node text{font-size:13px}.arch .layer{font-size:10px}}

/* proof strip */
.proof{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(6,8,12,.88);-webkit-position:relative}
.proof ul{list-style:none;display:grid;grid-template-columns:repeat(4,1fr)}
.proof li{padding:clamp(24px,3vw,38px) clamp(14px,2vw,26px);border-left:1px solid var(--line)}
.proof li:first-child{border-left:0}
.proof b{display:block;font:300 clamp(1.5rem,2.8vw,2.4rem)/1.1 var(--serif);letter-spacing:-.03em;color:#fff}
.proof span{color:var(--muted);font-size:.85rem;display:block;margin-top:6px}
@media(max-width:760px){.proof ul{grid-template-columns:1fr 1fr}.proof li:nth-child(3){border-left:0}.proof li:nth-child(n+3){border-top:1px solid var(--line)}}

/* ===== Progression (career) ===== */
.prog{position:relative;display:grid;gap:0;list-style:none}
.prog::before{content:"";position:absolute;left:19px;top:8px;bottom:8px;width:2px;background:var(--line)}
.prog::after{content:"";position:absolute;left:19px;top:8px;width:2px;height:var(--fill,0%);max-height:calc(100% - 16px);background:linear-gradient(var(--blue),var(--amber));box-shadow:0 0 16px rgba(106,165,224,.6);transition:height .2s linear}
.prog li{position:relative;margin:0 0 clamp(16px,2.4vw,26px) 62px;padding:clamp(20px,3vw,32px) clamp(20px,3vw,34px);background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);-webkit-transform-style:preserve-3d}
.prog li:last-child{margin-bottom:0}
.prog .dot{position:absolute;left:-54px;top:26px;width:24px;height:24px;border-radius:50%;background:var(--bg);border:2px solid var(--line2);display:grid;place-items:center;font:600 10px var(--mono);color:var(--faint);transition:.4s var(--ease)}
.prog li.on .dot{border-color:var(--blue);color:var(--blue-lt);box-shadow:0 0 18px rgba(106,165,224,.55)}
.prog li.ai.on .dot{border-color:var(--amber);color:var(--amber-lt);box-shadow:0 0 18px rgba(238,170,85,.55)}
.prog li.ai{border-color:rgba(238,170,85,.35)}
.step-meta{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:baseline;margin-bottom:6px}
.step-meta .when{font:.78rem var(--mono);color:var(--faint)}
.prog h3{font:400 clamp(1.4rem,2.4vw,1.9rem)/1.15 var(--serif);letter-spacing:-.02em}
.prog .org{color:var(--muted);font-size:.95rem}
.prog .stage{font:500 .72rem var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--blue-lt);display:block;margin-bottom:8px}
.prog li.ai .stage{color:var(--amber-lt)}
.prog ul.pts{list-style:none;margin:14px 0 0;display:grid;gap:9px;max-width:74ch}
.prog ul.pts li{margin:0;padding:0 0 0 18px;position:relative;color:var(--muted);font-size:.95rem;background:none;border:0;border-radius:0;-webkit-}
.prog ul.pts li::before{content:"";position:absolute;left:0;top:.75em;width:8px;height:1px;background:var(--faint)}
.prog ul.pts li b{color:var(--text);font-weight:600}
.prog details{margin-top:12px}
.prog summary{cursor:pointer;color:var(--blue-lt);font-size:.88rem}
@media(max-width:600px){.prog::before,.prog::after{left:11px}.prog li{margin-left:40px}.prog .dot{left:-40px}}

/* ===== Architecture chain ===== */
.chain{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;list-style:none}
.chain li{background:rgba(9,12,17,.82);padding:clamp(20px,2.4vw,30px) 22px;transition:background .3s}
.chain li:hover{background:rgba(22,28,38,.92)}
.chain b{display:block;font:400 1.25rem var(--serif);letter-spacing:-.01em;margin:8px 0 8px}
.chain p{margin:0;color:var(--muted);font-size:.9rem}
.chain .n{font:.72rem var(--mono);color:var(--amber-lt);letter-spacing:.14em}
@media(max-width:900px){.chain{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.chain{grid-template-columns:1fr}}

/* ===== Cards ===== */
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media(max-width:900px){.g3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.g2,.g3{grid-template-columns:1fr}}
.card{background-color:var(--glass);background-image:radial-gradient(380px circle at var(--mx,50%) var(--my,-80%),rgba(106,165,224,.15),transparent 65%);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(20px,2.4vw,28px);display:flex;flex-direction:column;gap:10px;min-width:0;-webkit-}
.card h3{font:400 1.3rem/1.2 var(--serif);letter-spacing:-.015em}
.card p{color:var(--muted);font-size:.93rem;margin:0}
.card .top{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.card .foot{margin-top:auto;padding-top:10px}
a.card{text-decoration:none;color:inherit;transition:border-color .3s,background-color .3s,box-shadow .4s var(--ease)}
a.card:hover{border-color:var(--blue);background-color:rgba(18,24,33,.9);box-shadow:0 30px 60px -30px rgba(106,165,224,.55)}
a.card .go{color:var(--blue-lt);font-size:.88rem;font-weight:550}
.card .sig{font:.78rem var(--mono);color:var(--amber-lt);border-top:1px dashed var(--line2);padding-top:10px;margin-top:4px}
.card.flag{padding:clamp(22px,2.8vw,32px)}
.card.flag h3{font-size:clamp(1.45rem,2.2vw,1.85rem)}
.ai-card{border-color:rgba(238,170,85,.2)}
.ai-card details{margin-top:6px}
.ai-card summary{cursor:pointer;color:var(--blue-lt);font-size:.88rem}
.flow{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font:.72rem var(--mono);color:var(--muted);margin-top:4px}
.flow span{border:1px solid var(--line2);border-radius:6px;padding:3px 8px}
.flow i{font-style:normal;color:var(--faint)}
.callout{border:1px solid rgba(238,170,85,.4);background:rgba(36,28,16,.72);border-radius:var(--r-lg);padding:20px 24px;margin-bottom:20px}
.callout b{color:var(--amber-lt)}

/* skills */
.skills{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
@media(max-width:700px){.skills{grid-template-columns:1fr}}
.skills .card h3{font-size:1.2rem}
.skills .tags{margin-top:2px}
.skills .tags li{font:.8rem var(--sans);color:var(--text);border:1px solid var(--line2);border-radius:999px;padding:4px 11px;background:rgba(6,8,12,.6)}

/* contact */
.contact{text-align:left;padding-bottom:clamp(120px,18vw,240px)}
.contact h2{font-size:clamp(2.6rem,7.4vw,6.6rem);max-width:15ch}
.contact .sec-head{margin-bottom:0}
.contact .actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px}
footer{border-top:1px solid var(--line);padding:30px 0;color:var(--faint);font-size:.85rem;background:rgba(6,8,12,.9);-webkit-position:relative}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
footer a{color:var(--muted)}

/* ===== Lab index ===== */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 28px}
.filters button{background:rgba(6,8,12,.6);color:var(--muted);border:1px solid var(--line2);border-radius:999px;padding:8px 14px;font:500 .85rem var(--sans);cursor:pointer}
.filters button:hover{color:#fff;border-color:var(--faint)}
.filters button[aria-pressed=true]{background:var(--text);color:#0a0c10;border-color:var(--text)}
.tier{margin:52px 0 18px;display:flex;align-items:baseline;gap:6px 16px;flex-wrap:wrap;padding:14px 20px;background:var(--glass);border:1px solid var(--line);border-left:3px solid var(--amber);border-radius:var(--r);}
.tier h2{font:400 1.5rem var(--serif);max-width:none;letter-spacing:-.02em}
.tier p{margin:0;color:var(--muted);font-size:.92rem}
[hidden]{display:none!important}

/* ===== Project page ===== */
.crumb{font:.8rem var(--mono);color:var(--faint);margin-bottom:18px}
.crumb a{color:var(--muted)}
.ph{margin:clamp(36px,6vw,80px) 0 clamp(28px,4vw,44px);position:relative}
.ph h1{font:300 clamp(2.4rem,6.4vw,5.6rem)/1 var(--serif);letter-spacing:-.04em;max-width:16ch;font-variation-settings:"opsz" 144}
.ph .eyebrow{margin-bottom:20px}
.ph .lede{margin-top:22px}
.ph .lede{max-width:64ch}
.ph .meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.prose{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:8px 0 0}
@media(max-width:760px){.prose{grid-template-columns:1fr}}
.prose .card h2{max-width:none;font-size:.78rem;line-height:1.3;font-family:var(--mono);font-variation-settings:normal;letter-spacing:.12em;text-transform:uppercase;color:var(--blue-lt);font-weight:500}
.prose .card p,.prose .card li{color:var(--text);font-size:.97rem}
.prose ol,.prose ul.l{margin:0;padding-left:1.15em;display:grid;gap:6px}
.demo-frame{border:1px solid var(--line2);border-radius:var(--r-lg);background:rgba(10,13,19,.94);margin:28px 0;overflow:hidden}
.demo-bar{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:10px 16px;border-bottom:1px solid var(--line);font:.75rem var(--mono);color:var(--faint);background:var(--surface)}
.demo{padding:clamp(14px,3vw,26px);min-width:0;min-height:420px}
.byline{margin:28px 0 0;color:var(--muted);font-size:.9rem}
.honest{border-left:2px solid var(--amber);padding:8px 0 8px 16px;background:linear-gradient(90deg,rgba(6,8,12,.7),transparent);margin:20px 0;color:var(--muted);font-size:.93rem}
.honest b{color:var(--amber-lt)}
.byline{background:linear-gradient(90deg,rgba(6,8,12,.7),transparent);padding:6px 0}
.pn{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:40px;padding-top:20px;border-top:1px solid var(--line)}

/* ===== Demo kit ===== */
.d-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:18px;border-bottom:1px solid var(--line);padding-bottom:12px}
.d-tab{background:transparent;color:var(--muted);border:1px solid var(--line2);border-radius:8px;padding:8px 13px;font:500 .85rem var(--sans);cursor:pointer}
.d-tab:hover{color:#fff}
.d-tab[aria-selected=true]{background:var(--blue);border-color:var(--blue);color:#06121e}
.d-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr))}
.d-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;min-width:0}
.d-card.hl{border-color:var(--blue)}
.d-card.ai{border-color:rgba(229,166,79,.5)}
.d-label{font:500 .72rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--faint);margin-bottom:8px;display:block}
.d-stat{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:700;letter-spacing:-.03em;line-height:1.1}
.d-stat small{font-size:.8rem;font-weight:500;color:var(--muted);letter-spacing:0;margin-left:6px}
.d-stat.bad{color:var(--red)}.d-stat.good{color:var(--green)}.d-stat.amber{color:var(--amber-lt)}
.d-row{display:grid;grid-template-columns:minmax(90px,150px) 1fr auto;gap:10px;align-items:center;margin:8px 0;font-size:.88rem}
.d-row .n{font:.78rem var(--mono);color:var(--muted);text-align:right;min-width:3.6em}
@media(max-width:520px){.d-row{grid-template-columns:1fr auto}.d-row .bar{grid-column:1/-1;order:3}}
.bar{height:10px;background:var(--surface2);border-radius:999px;overflow:hidden}
.bar>i{display:block;height:100%;width:var(--w,0%);background:var(--blue);border-radius:999px;transform-origin:left;transition:transform .8s cubic-bezier(.2,.7,.2,1);transform:scaleX(0)}
.is-in .bar>i,.bar.is-in>i,.no-anim .bar>i{transform:scaleX(1)}
.bar.amber>i{background:var(--amber)}.bar.green>i{background:var(--green)}.bar.red>i{background:var(--red)}.bar.dim>i{background:var(--line2)}
.d-flow{display:flex;flex-wrap:wrap;gap:8px;align-items:stretch;margin:6px 0 18px}
.d-step{flex:1 1 130px;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;position:relative;text-align:left;color:var(--text);font:inherit;cursor:pointer;transition:border-color .2s,background .2s}
.d-step b{display:block;font-size:.88rem}
.d-step span{display:block;font-size:.76rem;color:var(--muted);margin-top:2px}
.d-step .k{font:.72rem var(--mono);color:var(--faint);display:block;margin-bottom:4px}
.d-step.is-done{border-color:var(--line2);background:var(--surface2)}
.d-step.is-active{border-color:var(--blue);background:#14202e}
.d-step.ai.is-active{border-color:var(--amber);background:#241d12}
.d-step.bad.is-active{border-color:var(--red)}
.d-btn{background:var(--surface2);color:var(--text);border:1px solid var(--line2);border-radius:8px;padding:8px 14px;font:500 .85rem var(--sans);cursor:pointer}
.d-btn:hover{border-color:var(--faint)}
.d-btn.pri{background:var(--blue);border-color:var(--blue);color:#06121e}
.d-ctl{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 16px;align-items:center}
.d-kv{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-size:.88rem;margin:0}
.d-kv dt{color:var(--muted)}.d-kv dd{margin:0;text-align:right;font-family:var(--mono)}
.d-table{width:100%;border-collapse:collapse;font-size:.85rem}
.d-table th{text-align:left;font:500 .72rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--faint);padding:6px 8px;border-bottom:1px solid var(--line2)}
.d-table td{padding:8px;border-bottom:1px solid var(--line);vertical-align:top}
.d-table .num{text-align:right;font-family:var(--mono);white-space:nowrap}
.d-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.d-code{font:.8rem/1.6 var(--mono);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:12px 14px;overflow-x:auto;color:var(--blue-lt);margin:0;white-space:pre}
.d-note{font-size:.82rem;color:var(--faint);margin-top:14px}
.d-field{display:grid;gap:4px;margin-bottom:10px}
.d-field label{font-size:.82rem;color:var(--muted)}
.d-field input[type=range]{width:100%;accent-color:var(--blue)}
.d-field input[type=text],.d-field select,.d-field textarea{width:100%;background:var(--bg);color:var(--text);border:1px solid var(--line2);border-radius:8px;padding:9px 11px;font:.9rem var(--sans)}
.d-field output{font:.8rem var(--mono);color:var(--amber-lt)}
.d-svg{width:100%;height:auto}
.d-svg text{fill:var(--text);font:11px var(--sans)}
.d-svg .m{fill:var(--muted);font:10px var(--mono)}
.d-split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:760px){.d-split{grid-template-columns:1fr}}
.tok{display:inline-block;padding:1px 7px;border-radius:5px;margin:2px 2px 2px 0;font:.82rem var(--mono);background:var(--surface2);border:1px solid var(--line2)}
.tok.hit{border-color:var(--blue);color:var(--blue-lt)}
.tok.amber{border-color:var(--amber);color:var(--amber-lt)}

/* ===== Reveal / motion ===== */
.rv{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease);transition-delay:calc(var(--i,0)*70ms)}
.rv.in{opacity:1;transform:none}
.no-js .rv{opacity:1;transform:none}
/* cross-document view transition: pages dissolve while the header stays put (progressive enhancement) */
@view-transition{navigation:auto}
::view-transition-old(root){animation:vt-out .35s ease both}
::view-transition-new(root){animation:vt-in .55s var(--ease) both}
::view-transition-group(site-hdr){animation-duration:0s}
@keyframes vt-out{to{opacity:0;transform:scale(.985)}}
@keyframes vt-in{from{opacity:0;transform:scale(1.015)}}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
  .bar>i{transform:scaleX(1)}
  .arch .pulse,.scroll-cue{display:none}
  .hero,.hero-stick{min-height:0;position:relative}
  .hero-stick{padding-bottom:56px}
  @view-transition{navigation:none}
}
@media print{.hdr,.menu-btn,.arch,#world,.veil,.rail{display:none}body{background:#fff;color:#000}}
/* ===== Mobile refinements ===== */
@media(max-width:700px){
  :root{--hdr:60px}
  section{padding:72px 0}
  .eyebrow{font-size:.66rem;letter-spacing:.14em;gap:10px;margin-bottom:16px}
  .eyebrow::before{width:22px}
  h2{font-size:clamp(2rem,9.4vw,2.7rem);line-height:1.04}
  .lede{font-size:1rem;margin-top:18px}
  .sec-head{margin-bottom:32px}
  .sec-head::before,.ph::before{inset:-30px -18px -24px -18px}
  .hero-stick{padding-top:calc(var(--hdr) + 28px);padding-bottom:44px}
  .hero h1{font-size:clamp(3.3rem,17.5vw,4.6rem);line-height:.92}
  .hero .role{font-size:1.35rem}
  .hero .sub{font-size:1rem}
  .hero .actions{flex-direction:column;align-items:stretch}
  .hero .actions .btn,.contact .actions .btn{justify-content:center;width:100%}
  .contact .actions{flex-direction:column}
  .contact h2{font-size:clamp(2.2rem,10.5vw,3rem)}
  .contact{padding-bottom:80px}
  .card,.card.flag{padding:20px 18px}
  .card h3{font-size:1.25rem}
  .prog li{padding:20px 18px;margin-left:34px}
  .prog .dot{left:-34px;width:22px;height:22px;top:22px}
  .prog::before,.prog::after{left:10px}
  .proof li{padding:20px 14px}
  .chain li{padding:18px}
  .arch{padding:12px}
  .ph h1{font-size:clamp(2.3rem,11vw,3.2rem)}
  .tier{padding:12px 14px;margin-top:36px}
  .demo{padding:12px}
  .pn{flex-direction:column}
  .pn a{padding:10px 0}
}