/* base */
:root{box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;padding:0}
img{max-width:100%}
[hidden]:not([hidden=until-found i]){display:none!important}

/* Layout: clean white page, centred hero, one iridescent glass infinity ribbon as the only colour. */
:root{
  --bg:#FFFFFF;
  --surface:#F6F6F9;
  --fg:#15151A;
  --muted:#60626F;
  --line:#E9E9F0;
  --accent:#6A4DFF;
  --btn:#111114;--btn-fg:#FFFFFF;
  --nav-bg:rgba(255,255,255,.72);
  --f-display:"Lexend","Roboto",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-body:"Roboto",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --wrap:1160px;
  --gut:clamp(16px,4vw,40px);
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0A0A0D;--surface:#131318;--fg:#ECECF2;--muted:#9C9EAD;--line:#22222B;--accent:#A794FF;
  --btn:#F2F2F6;--btn-fg:#0A0A0D;--nav-bg:rgba(10,10,13,.7);color-scheme:dark;
}}
:root[data-theme="dark"]{
  --bg:#0A0A0D;--surface:#131318;--fg:#ECECF2;--muted:#9C9EAD;--line:#22222B;--accent:#A794FF;
  --btn:#F2F2F6;--btn-fg:#0A0A0D;--nav-bg:rgba(10,10,13,.7);color-scheme:dark;
}
*{box-sizing:border-box}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{background:var(--bg);color:var(--fg);font-family:var(--f-body);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;padding-inline:var(--gut);transition:background-color .5s ease,color .5s ease}
a{color:inherit}
.wrap{max-width:var(--wrap);margin-inline:auto}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
h1,h2,h3{font-family:var(--f-display);text-wrap:balance;margin:0;font-weight:400}
p{margin:0}

/* nav */
.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;margin-inline:calc(-1 * var(--gut));padding-inline:var(--gut);background:var(--nav-bg);backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%);transition:background-color .5s ease}
.nav .wrap{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;font-family:var(--f-display);font-weight:500;font-size:20px;letter-spacing:-.02em}
.brand svg{width:26px;height:26px}
.nav .wrap ul{display:flex;gap:34px;list-style:none;margin:0;padding:0}
.nav .wrap ul a{text-decoration:none;font-size:15px;color:var(--muted);transition:color .2s}
.nav .wrap ul a:hover{color:var(--fg)}
.nav-actions{display:flex;justify-content:flex-end;align-items:center;gap:10px}
.lang{display:flex;padding:3px;gap:2px;border-radius:999px;background:var(--surface)}
.lang button{font:500 12px/1 var(--f-mono);letter-spacing:.04em;border:0;background:transparent;color:var(--muted);padding:8px 10px;border-radius:999px;cursor:pointer}
.lang button[aria-pressed="true"]{background:var(--bg);color:var(--fg);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.theme-btn{width:36px;height:36px;display:grid;place-items:center;border-radius:999px;border:0;background:var(--surface);color:var(--fg);cursor:pointer;overflow:hidden;position:relative}
.theme-btn svg{width:17px;height:17px;position:absolute;transition:transform .5s cubic-bezier(.7,0,.2,1),opacity .35s ease}
.theme-btn .sun{transform:none;opacity:1}
.theme-btn .moon{transform:translateY(130%) rotate(-60deg);opacity:0}
.is-dark .theme-btn .sun{transform:translateY(-130%) rotate(60deg);opacity:0}
.is-dark .theme-btn .moon{transform:none;opacity:1}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font:500 15px/1 var(--f-body);padding:14px 22px;border-radius:12px;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:transform .2s ease,background-color .5s ease,color .5s ease,border-color .3s ease}
.btn.primary{background:var(--btn);color:var(--btn-fg)}
.btn.primary:hover{transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--fg)}
.btn.sm{padding:12px 18px;font-size:14px;border-radius:10px}
.arrow{transition:transform .2s ease}
.btn:hover .arrow{transform:translateX(3px)}
@media (max-width:900px){.nav .wrap ul{display:none}.nav .wrap{grid-template-columns:1fr auto}}
@media (max-width:560px){.nav .btn.sm{display:none}}

/* hero */
.hero{text-align:center;padding-top:clamp(48px,7vw,96px);overflow:hidden;margin-inline:calc(-1 * var(--gut))}
.hero .copy{padding-inline:var(--gut)}
.badge{display:inline-flex;align-items:center;gap:10px;padding:5px 14px 5px 5px;border-radius:999px;background:var(--surface);font-size:14px;color:var(--fg);text-decoration:none;transition:background-color .5s ease}
.badge .dot{width:26px;height:26px;border-radius:50%;background:var(--btn);color:var(--btn-fg);display:grid;place-items:center}
.badge .dot svg{width:15px;height:15px}
.badge .chev{color:var(--muted);transition:transform .2s}
.badge:hover .chev{transform:translateX(2px)}
.hero h1{font-size:clamp(36px,5.2vw,68px);font-weight:400;letter-spacing:-.03em;line-height:1.1;max-width:20ch;margin:28px auto 0}
.hero .lede{color:var(--muted);font-size:clamp(16px,1.5vw,19px);max-width:56ch;margin:24px auto 0}
.ctas{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:36px}
.stage{position:relative;height:clamp(300px,40vw,560px);margin-top:clamp(8px,2vw,24px)}
#gl{position:fixed;inset:0;width:100%;height:100%;display:block;z-index:0;pointer-events:none}
main,footer{position:relative;z-index:1}

/* smooth scroll (Lenis) */
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
.lenis.lenis-stopped{overflow:hidden}

/* scroll-linked 3D: driven by script, so everything is in place when it is on screen */
.fx{transform-origin:50% 100%;will-change:transform,opacity}
.hero .copy{will-change:transform,opacity}

/* shared section look */
section{padding-block:clamp(72px,10vw,128px)}
.eyebrow{font:500 12px/1.4 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 18px}
h2{font-size:clamp(28px,4vw,48px);letter-spacing:-.025em;line-height:1.12}
h3{font-size:20px;font-weight:500;letter-spacing:-.01em;line-height:1.3}
.lede{color:var(--muted);max-width:58ch}
.card{background:var(--surface);border-radius:24px;transition:background-color .5s ease}

/* two tracks */
.tracks{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:48px}
.track{padding:clamp(24px,3.4vw,40px);min-width:0}
.track .tag{font:500 12px/1 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.track h3{font-size:clamp(24px,2.6vw,32px);font-weight:400;letter-spacing:-.025em;margin-top:16px}
.track p{color:var(--muted);margin-top:12px;max-width:46ch}
.track ul{list-style:none;padding:0;margin:28px 0 0}
.track li{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-top:1px solid var(--line);font-size:15px}
.track li span:last-child{color:var(--muted);font:400 13px/1.6 var(--f-mono);text-align:right}
@media (max-width:760px){.tracks{grid-template-columns:1fr}}

/* products */
.index{margin-top:44px;padding:6px clamp(20px,3vw,32px)}
.row{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,2fr) auto;gap:24px;align-items:center;padding:24px 0;border-bottom:1px solid var(--line)}
.row:last-child,.row:not(:has(~ .row:not([hidden]))){border-bottom:0}
.row h3{font-size:21px}
.row p{color:var(--muted);font-size:15px}
.pill{font:500 11px/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;padding:8px 11px;border-radius:999px;background:var(--bg);color:var(--muted);white-space:nowrap}
.pill.live{color:var(--accent)}
@media (max-width:760px){.row{grid-template-columns:1fr auto;gap:8px 16px}.row p{grid-column:1 / -1;grid-row:2}}

/* models */
.models{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:48px}
.model{padding:30px;display:flex;flex-direction:column;gap:12px}
.model .k{font:400 12px/1 var(--f-mono);color:var(--muted)}
.model h3{font-size:24px;font-weight:400;letter-spacing:-.02em}
.model p{color:var(--muted);font-size:15px}
.model .fit{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);color:var(--fg);font-size:14px}
.model .fit b{font-weight:500}
@media (max-width:900px){.models{grid-template-columns:1fr}}

/* process: a real sequence, so it is numbered */
.steps{list-style:none;padding:0;margin:48px 0 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;counter-reset:s}
.steps li{padding:28px;counter-increment:s;min-width:0}
.steps li::before{content:counter(s,decimal-leading-zero);display:block;font:500 12px/1 var(--f-mono);color:var(--accent);margin-bottom:22px}
.steps p{color:var(--muted);font-size:15px;margin-top:10px}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:480px){.steps{grid-template-columns:1fr}}

/* name + recursion widget */
.name-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,6vw,80px);align-items:start}
.name-grid .big{font-family:var(--f-display);font-size:clamp(28px,3.4vw,42px);font-weight:300;letter-spacing:-.025em;line-height:1.2}
.name-grid .big b{font-weight:500;color:var(--accent)}
.name-grid .txt{display:flex;flex-direction:column;gap:18px;color:var(--muted);max-width:52ch}
@media (max-width:760px){.name-grid{grid-template-columns:1fr}}
.rec{margin-top:48px;overflow:hidden}
.rec-head{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 20px;border-bottom:1px solid var(--line);font:400 12px/1 var(--f-mono);color:var(--muted)}
.rec-ctrl{display:flex;align-items:center;gap:6px}
.rec-ctrl button{width:30px;height:30px;border-radius:9px;border:0;background:var(--bg);color:var(--fg);font:500 15px/1 var(--f-mono);cursor:pointer}
.rec-ctrl button:disabled{opacity:.35;cursor:default}
.rec-ctrl output{min-width:72px;text-align:center;font-variant-numeric:tabular-nums}
.rec-body{padding:clamp(20px,3vw,32px);font:400 clamp(14px,1.6vw,18px)/1.7 var(--f-mono);overflow-wrap:anywhere;min-height:5.4em}
.rec-body .core{color:var(--accent);font-weight:500}
.rec-body .p{color:var(--muted)}
.rec-note{padding:0 clamp(20px,3vw,32px) clamp(18px,2.4vw,24px);font:400 12px/1.5 var(--f-mono);color:var(--muted)}

/* contact */
.contact .card{text-align:center;padding:clamp(40px,7vw,96px) clamp(20px,5vw,64px)}
.contact h2{font-size:clamp(32px,5vw,60px);max-width:16ch;margin-inline:auto}
.contact .lede{margin:20px auto 0}
.contact-row{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;align-items:center;margin-top:36px}
.mail{font:400 clamp(15px,1.8vw,18px)/1 var(--f-mono);padding:15px 20px;border-radius:12px;background:var(--bg);user-select:all}
.copied{flex-basis:100%;min-height:1.2em;font:400 13px/1 var(--f-mono);color:var(--accent)}

footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-block:28px 36px;border-top:1px solid var(--line);font:400 12px/1.5 var(--f-mono);color:var(--muted)}

/* light/dark switch: the new theme opens as a circle from the button */
::view-transition-old(root),::view-transition-new(root){animation:none;mix-blend-mode:normal}
::view-transition-new(root){z-index:2}

/* ---------- touch & mobile ---------- */
html{-webkit-tap-highlight-color:transparent;-webkit-text-size-adjust:100%}
body{padding-left:max(var(--gut),env(safe-area-inset-left,0px));padding-right:max(var(--gut),env(safe-area-inset-right,0px))}
.btn:active{transform:scale(.97)}
@media (hover:none){
  .btn.primary:hover{transform:none}
  .btn.ghost:hover{border-color:var(--line)}
  .badge:hover .chev,.btn:hover .arrow{transform:none}
}
@media (pointer:coarse){
  .lang button{padding:10px 12px}
  .theme-btn,.menu-btn{width:42px;height:42px}
  .rec-ctrl button{width:38px;height:38px}
}

/* mobile menu */
.menu-btn{display:none;width:36px;height:36px;border:0;border-radius:999px;background:var(--surface);color:var(--fg);cursor:pointer;place-items:center;position:relative;transition:background-color .5s ease}
.menu-btn span{position:absolute;left:50%;top:50%;width:16px;height:1.6px;border-radius:2px;background:currentColor;transition:transform .45s cubic-bezier(.7,0,.2,1)}
.menu-btn span:first-child{transform:translate(-50%,-4px)}
.menu-btn span:last-child{transform:translate(-50%,3px)}
.nav.open .menu-btn span:first-child{transform:translate(-50%,-.5px) rotate(45deg)}
.nav.open .menu-btn span:last-child{transform:translate(-50%,-.5px) rotate(-45deg)}
.m-menu{display:none}
@media (max-width:900px){
  .menu-btn{display:grid}
  .m-menu{display:grid;grid-template-rows:0fr;transition:grid-template-rows .5s cubic-bezier(.7,0,.2,1);position:absolute;left:0;right:0;top:100%;padding-inline:inherit;background:var(--bg);box-shadow:0 24px 40px -28px rgba(0,0,0,.35);max-height:calc(100dvh - 72px);overflow-y:auto}
  .nav:not(.open) .m-menu{box-shadow:none}
  .m-inner{overflow:hidden;min-height:0;max-width:var(--wrap);margin-inline:auto;width:100%}
  .nav.open .m-menu{grid-template-rows:1fr}
  .nav.open{background:var(--bg)}
  .m-menu ul{list-style:none;margin:0;padding:8px 0 0}
  .m-menu li{border-top:1px solid var(--line);opacity:0;transform:translateY(-8px);transition:opacity .3s ease,transform .4s ease}
  .m-menu li a{display:block;padding:16px 0;text-decoration:none;font:400 24px/1.2 var(--f-display);letter-spacing:-.02em}
  .m-menu .btn{width:100%;margin:12px 0 24px;opacity:0;transition:opacity .3s ease}
  .nav.open .m-menu li,.nav.open .m-menu .btn{opacity:1;transform:none}
  .nav.open .m-menu li:nth-child(2){transition-delay:.04s}
  .nav.open .m-menu li:nth-child(3){transition-delay:.08s}
  .nav.open .m-menu li:nth-child(4){transition-delay:.12s}
  .nav.open .m-menu .btn{transition-delay:.16s}
}
@media (max-width:480px){
  .contact-row .mail,.contact-row .btn{width:100%}
  .mail{font-size:15px;overflow-wrap:anywhere}
  .track li{flex-wrap:wrap;gap:4px 16px}
  .model,.steps li{padding:24px}
}

/* ---------- card effects ---------- */
.card{position:relative;isolation:isolate;transition:background-color .5s ease,box-shadow .5s ease}
.card.fx{transform-origin:50% 60%}
/* soft spotlight under the pointer */
.card::before{content:"";position:absolute;inset:0;z-index:-1;border-radius:inherit;pointer-events:none;opacity:0;transition:opacity .45s ease;
  background:radial-gradient(520px circle at var(--mx,50%) var(--my,50%),color-mix(in srgb,var(--accent) 13%,transparent),transparent 60%)}
/* a 1px border that glows near the pointer */
.card::after{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;pointer-events:none;opacity:0;transition:opacity .45s ease;
  background:radial-gradient(260px circle at var(--mx,50%) var(--my,50%),color-mix(in srgb,var(--accent) 75%,transparent),transparent 70%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}
.card.is-hot::before,.card.is-hot::after{opacity:1}
.card.is-hot{box-shadow:0 30px 60px -36px color-mix(in srgb,var(--accent) 55%,transparent)}

/* small details inside cards */
.track li{transition:color .3s ease,padding .35s ease}
.row h3,.steps li h3,.model h3{transition:transform .4s cubic-bezier(.2,.8,.2,1),color .3s ease}
.steps li::before{transition:transform .4s cubic-bezier(.2,.8,.2,1)}
@media (hover:hover){
  .track li:hover{padding-left:6px}
  .track li:hover span:first-child{color:var(--accent)}
  .row:hover h3{transform:translateX(6px);color:var(--accent)}
  .steps li:hover::before{transform:translateX(4px) scale(1.15)}
  .model:hover h3{transform:translateX(4px)}
}
.pill.live{display:inline-flex;align-items:center;gap:7px}
.pill.live::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;animation:live 2s ease-out infinite}
@keyframes live{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 60%,transparent)}100%{box-shadow:0 0 0 8px transparent}}

/* ---------- pointer effects ---------- */
.magnetic{translate:var(--gx,0px) var(--gy,0px);transition:translate .4s cubic-bezier(.2,.8,.2,1),transform .2s ease,background-color .5s ease,color .5s ease,border-color .3s ease}
.cursor-dot,.cursor-ring{position:fixed;left:0;top:0;z-index:100;pointer-events:none;border-radius:50%;opacity:0;mix-blend-mode:difference;will-change:transform}
.cursor-dot{width:6px;height:6px;margin:-3px 0 0 -3px;background:#fff;transition:opacity .3s ease,width .25s ease,height .25s ease,margin .25s ease}
.cursor-ring{width:34px;height:34px;margin:-17px 0 0 -17px;border:1.5px solid #fff;transition:opacity .3s ease,width .35s cubic-bezier(.2,.8,.2,1),height .35s cubic-bezier(.2,.8,.2,1),margin .35s cubic-bezier(.2,.8,.2,1),background-color .3s ease,border-width .3s ease}
.cursor-on .cursor-dot,.cursor-on .cursor-ring{opacity:1}
.cursor-hot .cursor-ring{width:52px;height:52px;margin:-26px 0 0 -26px;mix-blend-mode:normal;border-color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}
.cursor-hot .cursor-dot{width:0;height:0;margin:0}
.cursor-card .cursor-ring{width:46px;height:46px;margin:-23px 0 0 -23px}
.cursor-text .cursor-ring{width:4px;height:26px;margin:-13px 0 0 -2px;border-radius:2px;background:#fff;border-width:0}
.cursor-text .cursor-dot{opacity:0}
.cursor-down .cursor-ring{width:24px;height:24px;margin:-12px 0 0 -12px}
html.has-cursor,html.has-cursor *{cursor:none!important}
.ripple{position:fixed;z-index:99;width:10px;height:10px;margin:-5px 0 0 -5px;border-radius:50%;pointer-events:none;border:1.5px solid var(--accent);animation:ripple .6s cubic-bezier(.2,.8,.2,1) forwards}
@keyframes ripple{to{transform:scale(7);opacity:0}}

/* clicking (once or many times) never highlights text; only the email stays selectable */
body{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
.mail{-webkit-user-select:all;user-select:all}
/* controls never pick up a text selection */
button,.btn,.lang,.theme-btn,.menu-btn,.rec-head,.pill,.badge,.brand,.nav .wrap ul{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}

/* contact: free consultation tag */
.contact .free{display:inline-flex;align-items:center;gap:8px;margin-top:22px;padding:7px 14px;border-radius:999px;background:color-mix(in srgb,var(--accent) 12%,var(--bg));color:var(--accent);font:500 13px/1 var(--f-mono);letter-spacing:.04em}
.contact .free::before{content:"✓"}

/* footer GitHub link */
footer .gh{display:inline-flex;align-items:center;gap:8px;text-decoration:none;color:var(--muted);transition:color .2s ease}
footer .gh svg{width:16px;height:16px}
footer .gh:hover{color:var(--fg)}