/* Hallmark · pre-emit critique: P4 H5 E4 S5 R5 V4
 * genre: modern-minimal · macrostructure: Narrative Workflow
 * theme: studied-DNA / Nexus public reference, Arka monochrome identity
 * nav: N9 Edge-aligned · footer: Ft5 Statement
 * audience: laboratory R&D teams · use: evaluate a sample-monitoring pilot
 * enrichment: preserved Arka concept imagery + interactive sample record */
@import url('tokens.css');
:root{--lab-paper:oklch(0% 0 0);--lab-panel:oklch(16% 0 0);--lab-ink:oklch(97% 0 0);--lab-muted:oklch(72% 0 0);--lab-line:oklch(30% 0 0);--lab-hover:oklch(24% 0 0);--lab-inverse:oklch(0% 0 0);--lab-clear:transparent;--lab-grid:oklch(26% 0 0);--z-nav:20;--z-menu:30;--lab-font:var(--font-body);--lab-radius:18px}
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@media(min-width:40rem){.wrap{width:min(1320px,calc(100% - 80px))}.lab-nav{padding-inline:40px}.nav-action{display:flex;margin-left:auto}.lab-hero{padding:65px 40px 0}.journey-nav{grid-template-columns:repeat(4,minmax(0,1fr))}.journey-nav button{font-size:14px;flex-direction:column;align-items:flex-start}.sample-record{padding:32px}.record-reading strong{font-size:58px}.record-reading>span{font-size:13px}.hero-object img{height:500px}.collar-stage>img,.collar-canvas{height:650px}.sensing-list article{grid-template-columns:1fr 2fr;gap:32px}.research-links{grid-template-columns:repeat(2,minmax(0,1fr))}.demo-layout{padding-inline:40px}.doc-main{padding-inline:40px}}
@media(min-width:60rem){.lab-nav nav{display:flex}.menu-toggle{display:none}.nav-action{margin-left:0}.lab-hero{min-height:700px;display:grid;grid-template-columns:1.1fr minmax(0,1fr);padding-top:95px;gap:0;align-items:center}.hero-intro{z-index:1;padding-bottom:90px}.lab-hero h1{position:relative;width:115%;font-size:clamp(62px,6.5vw,100px)}.hero-object{margin:0;align-self:stretch;min-width:0}.hero-object img{height:100%;min-height:590px;object-position:62% center}.hero-object figcaption{position:absolute;bottom:18px;right:0}.problem-section{grid-template-columns:1.3fr 1fr;padding-block:140px;gap:70px;align-items:start}.problem-section h2{font-size:52px}.section-intro{flex-direction:row;justify-content:space-between;align-items:end}.journey-content{grid-template-columns:1fr 1.35fr;gap:80px;align-items:center}.journey-description h3{font-size:43px;max-width:400px}.journey-nav button{flex-direction:row;padding:20px}.optical-section{grid-template-columns:1fr minmax(0,1fr);gap:80px;align-items:center}.optical-figure img{height:580px}.pilot-section{grid-template-columns:1.2fr 1fr;gap:70px;padding-block:100px}.demo-grid{grid-template-columns:320px minmax(0,1fr)}.demo-detail{max-width:850px}.lab-footer{padding-bottom:70px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}

.lab-nav>a>img{filter:brightness(0) invert(1)}

/* Hallmark · macrostructure: Narrative Workflow · theme: studied-DNA (source: nexus.cld9.ai/careers) */
.page-progress{position:fixed;top:0;left:0;width:100%;height:2px;background:var(--lab-ink);transform:scaleX(0);transform-origin:left;z-index:var(--z-menu);pointer-events:none}
.hero-3d-link{margin-left:24px}.hero-object{will-change:transform}.journey-content{animation:arrive .42s var(--ease-out) both}.chart-line{stroke-dasharray:700;stroke-dashoffset:0;animation:trace-line .8s var(--ease-out) both}@keyframes trace-line{from{stroke-dashoffset:700}to{stroke-dashoffset:0}}
.collar-view{position:relative;height:480px}.collar-view .collar-canvas{position:absolute;inset:0;height:100%}.collar-poster{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.collar-controls{align-items:center}.collar-controls button{line-height:1;min-width:44px}.collar-controls>span{flex-basis:100%}.finish-options{display:flex;gap:8px;flex-wrap:wrap}.finish-options button{text-transform:capitalize}.finish-options button[aria-pressed=true]{background:var(--lab-ink);color:var(--lab-inverse)}.finish-options button[aria-pressed=true]:hover{background:var(--lab-muted)}
@media(min-width:40rem){.collar-view{height:650px}}
@media(max-width:39.99rem){.hero-3d-link{margin-left:16px;font-size:14px}.journey-nav{grid-template-columns:minmax(0,1fr)}.sample-list button{white-space:normal}.sample-list button strong{font-size:14px}.sample-list button span{font-size:12px}}
@media(prefers-reduced-motion:reduce){.hero-object{transform:none!important;will-change:auto}.journey-content,.chart-line{animation:none}}

/* Preserve the original Arka product stage; Nexus pacing and OpenAI restraint. */
.lab-hero{display:flex;flex-direction:column;align-items:center;gap:0;padding:16px 20px 26px;min-height:0;max-width:1600px}.hero-wordmark .arka-logo-frame{width:170px;height:49px}.hero-object{position:relative;width:100%;height:310px;margin:0;align-self:auto}.hero-object img{position:absolute;inset:0;width:100%;height:100%;min-height:0;object-fit:cover;object-position:center}.hero-live{position:absolute;inset:0}.hero-live canvas{display:block;width:100%;height:100%;pointer-events:none}.hero-intro{text-align:center;padding:0;z-index:1}.lab-hero h1{width:auto;font-size:clamp(36px,4vw,58px);max-width:1100px;letter-spacing:-.05em;font-weight:500}.hero-description{font-size:17px;max-width:620px;margin:14px auto 0}.hero-actions{display:flex;align-items:center;justify-content:center;gap:24px}.hero-actions .pill,.hero-actions .text-link{margin:24px 0 0}.hero-caption{font-size:11px;color:var(--lab-muted);margin-top:24px}.mobile-break{display:none}.chapter-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--lab-line);border-bottom:1px solid var(--lab-line);gap:32px}.chapter-links a{min-height:72px;display:flex;align-items:center;gap:20px;white-space:nowrap;font-size:14px}.chapter-links span{font-size:11px;color:var(--lab-muted)}.chapter-links svg{margin-left:auto}.nav-action{border-radius:40px;background:var(--lab-panel);padding:10px 18px;min-height:44px}
@media(min-width:60rem){.hero-object{height:330px}.lab-hero{padding-top:16px}.problem-section{padding-block:120px}}
@media(max-width:39.99rem){.hero-wordmark .arka-logo-frame{width:146px;height:42px}.hero-object{height:290px}.hero-actions{gap:18px}.hero-actions .pill{padding:12px 18px}.hero-caption{font-size:10px}.mobile-break{display:block}.chapter-links{gap:0;grid-template-columns:minmax(0,1fr)}.chapter-links a{min-height:52px}.chapter-links a+a{border-top:1px solid var(--lab-line)}}