/* Ingot3D — shared styles
   Layout: a dark "foundry" ground; models sit in 3D-viewport frames; specs read like a modelling tool's stats overlay. */
:root{
  --ground:#121110;
  --surface:#1a1917;
  --raise:#22201d;
  --line:#2d2a26;
  --text:#f3f0e8;
  --muted:#9e988b;
  --gold:#e5bf00;
  --gold-soft:#f3d861;
  --ink-on-gold:#1a1500;
  --ok:#6cc26a; --warn:#e0a43a; --bad:#e5534b;
  --axis-x:#e5534b; --axis-y:#6cc26a; --axis-z:#4f8ff7;
  --font-sans:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r:14px;
  --gutter-l:max(20px, env(safe-area-inset-left, 0px));
  --gutter-r:max(20px, env(safe-area-inset-right, 0px));
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ground);color:var(--text);font:400 16px/1.6 var(--font-sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--ground)}
a{color:inherit}
img{max-width:100%;display:block}
h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.025em;text-wrap:balance}
p{margin:0}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:6px}
.wrap{max-width:1240px;margin:0 auto;padding-left:var(--gutter-l);padding-right:var(--gutter-r)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.eyebrow{font:500 12.5px/1 var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--gold)}
.section{padding-block:104px}
.section.tight{padding-top:0}
.section-head{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:clamp(30px,3.6vw,46px);line-height:1.05;margin-top:14px;max-width:18ch}
.section-head p{color:var(--muted);max-width:44ch}
.demo-banner{background:var(--raise);border-bottom:1px solid var(--line);color:var(--muted);font:400 13px/1.4 var(--font-mono);text-align:center;padding:8px 16px}
.demo-banner b{color:var(--gold);font-weight:500}

/* ---------- buttons (also restyles Gumroad's overlay links) ---------- */
.btn,a.btn.gumroad-button{
  display:inline-flex!important;align-items:center;justify-content:center;gap:10px;
  padding:13px 22px!important;border-radius:10px!important;border:1px solid transparent!important;
  font:600 15.5px/1 var(--font-sans)!important;letter-spacing:.005em;text-decoration:none!important;cursor:pointer;
  background:var(--gold)!important;background-image:none!important;color:var(--ink-on-gold)!important;box-shadow:none!important;
  transition:background-color .18s,transform .18s,border-color .18s;text-shadow:none!important;white-space:nowrap;
}
.btn:hover,a.btn.gumroad-button:hover{background:var(--gold-soft)!important;transform:translateY(-1px)}
.btn.ghost{background:transparent!important;color:var(--text)!important;border-color:var(--line)!important}
.btn.ghost:hover{border-color:var(--muted)!important;background:var(--raise)!important}
.btn.sm,a.btn.sm.gumroad-button{padding:9px 14px!important;font-size:14px!important;border-radius:8px!important}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}
.btn[hidden],a.btn[hidden]{display:none!important}
.gumroad-button-logo,.gumroad-button .logo-full{display:none!important}

/* ---------- nav ---------- */
.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:color-mix(in srgb,var(--ground) 80%,transparent);
  backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);border-bottom:1px solid transparent;transition:border-color .2s}
.nav.scrolled,.nav.solid{border-bottom-color:var(--line)}
.nav .wrap{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:600;font-size:19px;letter-spacing:-.02em}
.brand img{width:34px;height:auto}
.nav-links{display:flex;gap:26px;margin-left:auto}
.nav-links a{text-decoration:none;color:var(--muted);font-size:15px;font-weight:500;transition:color .15s}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--text)}
@media (max-width:760px){.nav-links{display:none}.nav .btn{margin-left:auto}}

/* ---------- hero ---------- */
#ig-hero{position:relative;height:clamp(560px,76vh,800px);overflow:hidden;background:var(--ground)}
#ig-hero .ig-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:0;transition:opacity 1.2s ease;
  -webkit-mask-image:linear-gradient(to bottom,transparent,#000 10%,#000 84%,transparent),linear-gradient(to right,transparent,#000 22%,#000 96%,transparent);
  -webkit-mask-composite:source-in;mask-image:linear-gradient(to bottom,transparent,#000 10%,#000 84%,transparent),linear-gradient(to right,transparent,#000 22%,#000 96%,transparent);mask-composite:intersect}
#ig-hero.ig-ready .ig-canvas{opacity:1}
#ig-hero .ig-fallback{position:absolute;right:8%;top:50%;width:min(38vw,460px);transform:translateY(-50%);opacity:.9;filter:drop-shadow(0 30px 60px rgba(229,191,0,.18))}
#ig-hero.ig-ready .ig-fallback{display:none}
.hero-copy{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;gap:22px;max-width:1240px;margin:0 auto}
.hero-copy > *{max-width:640px}
.hero-copy h1{font-size:clamp(40px,5vw,72px);line-height:.98;letter-spacing:-.04em;font-weight:600}
.hero-copy h1 span{color:var(--gold)}
.hero-copy p{color:var(--muted);font-size:18.5px;max-width:42ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:14px;font:400 13.5px/1.4 var(--font-mono);color:var(--muted)}
.hero-meta b{color:var(--text);font-weight:500}
.ig-replay{position:absolute;right:max(20px,calc(env(safe-area-inset-right,0px) + 20px));bottom:26px;z-index:3;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:color-mix(in srgb,var(--ground) 60%,transparent);color:var(--muted);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;transition:opacity .4s,color .2s,border-color .2s}
#ig-hero.ig-ready .ig-replay{opacity:1}
.ig-replay:hover{color:var(--gold);border-color:var(--gold)}
@media (max-width:820px){
  #ig-hero{height:auto}
  #ig-hero .ig-canvas{position:relative;height:360px}
  #ig-hero .ig-fallback{position:relative;right:auto;top:auto;transform:none;margin:40px auto 0;width:70%}
  #ig-hero.ig-ready .ig-fallback{display:none}
  .hero-copy{height:auto;padding-block:8px 64px;text-align:center;align-items:center}
  .hero-copy p{margin-inline:auto}
  .hero-cta,.hero-meta{justify-content:center}
  .ig-replay{top:310px;bottom:auto}
}

/* ---------- strip ---------- */
.strip{border-block:1px solid var(--line)}
.strip .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 30px;padding-block:22px;font:500 14px/1 var(--font-mono);color:var(--muted)}
.strip .wrap span:first-child{color:var(--text)}

/* ---------- model cards ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:20px}
.card{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:border-color .2s,transform .25s;min-width:0}
.card:not(.soon):hover{border-color:color-mix(in srgb,var(--gold) 55%,var(--line));transform:translateY(-3px)}
.card .open{display:block;text-decoration:none;color:inherit}
.card .open:focus-visible{outline:2px solid var(--gold);outline-offset:-2px;border-radius:var(--r) var(--r) 0 0}
.viewport{position:relative;aspect-ratio:4/3;max-width:100%;overflow:hidden;
  background:radial-gradient(70% 60% at 50% 55%,#2a2723 0%,#1c1a18 60%,#171614 100%)}
.viewport::before{content:"";position:absolute;left:-25%;right:-25%;bottom:-10%;height:55%;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:34px 34px;
  transform:perspective(320px) rotateX(62deg);transform-origin:bottom;opacity:.55;
  -webkit-mask-image:linear-gradient(to top,#000 10%,transparent);mask-image:linear-gradient(to top,#000 10%,transparent)}
.viewport > img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.card:not(.soon):hover .viewport > img{transform:scale(1.04)}
.viewport .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.viewport .ph img{width:34%;height:auto;opacity:.16;filter:grayscale(1) brightness(1.6)}
.vp-tag{position:absolute;left:12px;top:12px;font:500 11.5px/1 var(--font-mono);letter-spacing:.06em;color:var(--muted);text-transform:uppercase}
.badge{position:absolute;right:12px;top:10px;font:600 11.5px/1 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;padding:6px 9px;border-radius:6px;background:var(--gold);color:var(--ink-on-gold)}
.badge.soon{background:var(--raise);color:var(--muted);border:1px solid var(--line)}
.card-body{display:flex;flex-direction:column;gap:12px;padding:16px 18px 18px;flex:1}
.card-top{display:flex;justify-content:space-between;gap:12px;align-items:baseline}
.card h3{font-size:18px;letter-spacing:-.015em;min-width:0;overflow-wrap:anywhere}
.price{font:500 16px var(--font-mono);color:var(--gold);white-space:nowrap}
.card .cat{color:var(--muted);font-size:14px;margin-top:-8px}
.specs{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto}
.spec{font:400 12px/1 var(--font-mono);color:var(--muted);padding:6px 8px;border-radius:6px;background:var(--raise)}
.spec.hl{color:var(--gold-soft)}
.card-actions{display:flex;gap:8px;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:12px 18px}
.card-actions .linkish{color:var(--muted);font-size:14px;font-weight:500;text-decoration:none}
.card-actions .linkish:hover{color:var(--text)}
.card.skeleton .viewport{animation:pulse 1.4s ease-in-out infinite}
.card.skeleton .bar{height:12px;border-radius:6px;background:var(--raise);animation:pulse 1.4s ease-in-out infinite}
@keyframes pulse{50%{opacity:.55}}
.empty{grid-column:1/-1;padding:56px 20px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:var(--r)}

/* ---------- carousel ---------- */
.carousel{position:relative}
.track{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(280px,calc((100% - 60px)/4));gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  scroll-padding-inline:0;padding-bottom:6px;scrollbar-width:none;overscroll-behavior-x:contain}
.track::-webkit-scrollbar{display:none}
.track > *{scroll-snap-align:start}
.track.dragging{scroll-snap-type:none;cursor:grabbing}
.track.dragging *{pointer-events:none}
@media (max-width:1100px){.track{grid-auto-columns:minmax(260px,calc((100% - 40px)/3))}}
@media (max-width:760px){.track{grid-auto-columns:78%}}
.car-nav{display:flex;gap:8px}
.car-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--text);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s}
.car-btn:hover:not([disabled]){border-color:var(--muted);background:var(--raise)}
.car-btn[disabled]{opacity:.35;cursor:default}
.see-all{display:flex;flex-direction:column;justify-content:space-between;gap:20px;padding:24px;border-radius:var(--r);border:1px dashed var(--line);text-decoration:none;color:var(--text);transition:border-color .2s;min-height:100%}
.see-all:hover{border-color:var(--gold)}
.see-all strong{font-size:22px;font-weight:600;letter-spacing:-.02em}
.see-all span{color:var(--muted)}
.see-all .arrow{width:48px;height:48px;border-radius:50%;background:var(--gold);color:var(--ink-on-gold);display:flex;align-items:center;justify-content:center}

/* ---------- catalog page ---------- */
.page-head{padding-block:64px 36px}
.page-head h1{font-size:clamp(36px,4.6vw,60px);line-height:1;letter-spacing:-.035em;margin-top:14px}
.page-head p{color:var(--muted);margin-top:14px;max-width:56ch}
.toolbar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-bottom:22px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font:500 14px/1 var(--font-sans);padding:10px 15px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;transition:all .15s}
.chip:hover{color:var(--text);border-color:var(--muted)}
.chip[aria-pressed="true"]{background:var(--text);color:var(--ground);border-color:var(--text)}
.chip .n{opacity:.6;margin-left:6px;font-family:var(--font-mono);font-size:12.5px}
.tools{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.search{position:relative;flex:0 1 260px;min-width:0}
.search input,.select{width:100%;padding:11px 14px 11px 40px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--text);font:400 15px var(--font-sans)}
.search input::placeholder{color:var(--muted)}
.search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted)}
.select{padding-left:14px;width:auto;cursor:pointer}
.toggle{display:inline-flex;align-items:center;gap:9px;font-size:14.5px;color:var(--muted);cursor:pointer;padding:10px 14px;border:1px solid var(--line);border-radius:10px;user-select:none}
.toggle input{accent-color:var(--gold);width:16px;height:16px;margin:0}
.toggle:has(input:checked){color:var(--text);border-color:color-mix(in srgb,var(--gold) 60%,var(--line))}
.result-count{color:var(--muted);font:400 13.5px var(--font-mono);margin-bottom:18px}

/* ---------- product page ---------- */
.crumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding-block:26px 22px;font:400 13.5px var(--font-mono);color:var(--muted)}
.crumbs a{text-decoration:none}
.crumbs a:hover{color:var(--text)}
.product{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:40px;align-items:start}
.stage{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;max-width:100%}
.stage > .viewport{position:absolute;inset:0;aspect-ratio:auto}
.stage canvas.v3d{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:grab;touch-action:none}
.stage canvas.v3d:active{cursor:grabbing}
.v-bar{position:absolute;left:12px;right:12px;top:12px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;z-index:2;pointer-events:none}
.v-bar > *{pointer-events:auto}
.seg{display:inline-flex;padding:3px;border-radius:10px;background:color-mix(in srgb,var(--ground) 70%,transparent);border:1px solid var(--line);backdrop-filter:blur(8px)}
.seg button{all:unset;cursor:pointer;font:500 12.5px/1 var(--font-mono);padding:8px 11px;border-radius:7px;color:var(--muted)}
.seg button:hover{color:var(--text)}
.seg button[aria-pressed="true"]{background:var(--raise);color:var(--text)}
.seg button:focus-visible{outline:2px solid var(--gold)}
.v-foot{position:absolute;left:14px;right:14px;bottom:12px;display:flex;justify-content:space-between;gap:12px;font:400 12px var(--font-mono);color:var(--muted);pointer-events:none;z-index:2}
.v-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font:400 13px var(--font-mono);color:var(--muted);z-index:1}
.gizmo{width:46px;height:46px}
.thumbs{display:flex;gap:10px;margin-top:12px;overflow-x:auto;padding-bottom:4px}
.thumb{flex:none;width:86px;aspect-ratio:4/3;border-radius:10px;overflow:hidden;border:1px solid var(--line);background:var(--surface);cursor:pointer;padding:0;position:relative}
.thumb img{width:100%;height:100%;object-fit:cover}
.thumb[aria-pressed="true"]{border-color:var(--gold)}
.thumb .t3d{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font:600 13px var(--font-mono);color:var(--gold)}
.info{display:flex;flex-direction:column;gap:18px;position:sticky;top:calc(env(safe-area-inset-top,0px) + 92px)}
.info h1{font-size:clamp(32px,3.4vw,44px);line-height:1.02;letter-spacing:-.03em}
.info .pprice{font:500 24px var(--font-mono);color:var(--gold)}
.info .buy .btn{width:100%;padding:17px 22px!important;font-size:16.5px!important}
.note{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13.5px}
.desc{color:var(--muted);white-space:pre-line}
.dl{display:grid;grid-template-columns:auto 1fr;border-top:1px solid var(--line);font-size:14.5px;margin:0}
.dl dt,.dl dd{margin:0;padding:11px 0;border-bottom:1px solid var(--line)}
.dl dt{color:var(--muted);padding-right:24px}
.dl dd{font-family:var(--font-mono);text-align:right;font-size:13.5px}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tags a{font:400 12.5px/1 var(--font-mono);color:var(--muted);text-decoration:none;padding:7px 9px;border:1px solid var(--line);border-radius:999px}
.tags a:hover{color:var(--text);border-color:var(--muted)}
@media (max-width:900px){.product{grid-template-columns:1fr}.info{position:static}}

/* ---------- features / steps / license / faq / cta ---------- */
.features{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.feature{padding:30px 26px 32px;display:flex;flex-direction:column;gap:12px;min-width:0}
.feature + .feature{border-left:1px solid var(--line)}
.feature .k{font:500 13px var(--font-mono);color:var(--gold)}
.feature h3{font-size:19px;letter-spacing:-.015em}
.feature p{color:var(--muted);font-size:15px}
@media (max-width:960px){.features{grid-template-columns:1fr 1fr}.feature:nth-child(3){border-left:0}.feature:nth-child(n+3){border-top:1px solid var(--line)}}
@media (max-width:560px){.features{grid-template-columns:1fr}.feature + .feature{border-left:0;border-top:1px solid var(--line)}}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
.step{padding:28px 26px;border-radius:var(--r);background:var(--surface);display:flex;flex-direction:column;gap:10px}
.step::before{counter-increment:s;content:"0" counter(s);font:500 13px var(--font-mono);color:var(--gold)}
.step h3{font-size:19px}
.step p{color:var(--muted);font-size:15px}
@media (max-width:860px){.steps{grid-template-columns:1fr}}
.license{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.lic{border:1px solid var(--line);border-radius:var(--r);padding:28px 28px 30px}
.lic h3{font-size:18px;display:flex;align-items:center;gap:10px;margin-bottom:16px}
.lic ul{list-style:none;margin:0;padding:0;display:grid;gap:12px;color:var(--muted)}
.lic li{display:flex;gap:12px;align-items:flex-start}
.lic li svg{flex:none;margin-top:5px}
@media (max-width:760px){.license{grid-template-columns:1fr}}
.faq{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);gap:48px}
.faq h2{font-size:clamp(30px,3.6vw,46px);line-height:1.05;margin-top:14px}
.faq-list{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:20px;padding:22px 0;font-weight:500;font-size:17.5px}
.faq summary::-webkit-details-marker{display:none}
.faq summary .pm{flex:none;width:22px;height:22px;position:relative;color:var(--muted)}
.faq summary .pm::before,.faq summary .pm::after{content:"";position:absolute;left:4px;right:4px;top:10px;height:2px;background:currentColor;border-radius:2px;transition:transform .2s}
.faq summary .pm::after{transform:rotate(90deg)}
.faq details[open] .pm::after{transform:rotate(0)}
.faq details p{color:var(--muted);padding:0 40px 22px 0;max-width:62ch}
@media (max-width:860px){.faq{grid-template-columns:1fr;gap:24px}}
.cta{position:relative;overflow:hidden;border-radius:20px;padding:64px 48px;background:
    radial-gradient(60% 120% at 85% 50%,color-mix(in srgb,var(--gold) 22%,transparent),transparent 70%),var(--surface);
  display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between;border:1px solid var(--line)}
.cta h2{font-size:clamp(28px,3.4vw,42px);line-height:1.05;max-width:18ch}
.cta img{position:absolute;right:-30px;bottom:-40px;width:260px;opacity:.12;pointer-events:none}
@media (max-width:600px){.cta{padding:40px 24px}}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);margin-top:104px}
footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;padding-block:52px 40px}
footer h4{margin:0 0 14px;font:500 12.5px var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
footer ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
footer a{text-decoration:none;color:var(--text);opacity:.85}
footer a:hover{opacity:1;color:var(--gold)}
footer .fine{grid-column:1/-1;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:28px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer .about{color:var(--muted);max-width:36ch;margin-top:14px}
@media (max-width:760px){footer .wrap{grid-template-columns:1fr 1fr}footer .wrap > div:first-child{grid-column:1/-1}}

.reveal{transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.pending{opacity:.001;transform:translateY(18px)}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}html{scroll-behavior:auto}}