.lab-header.sample-header{position:sticky;top:0;z-index:35;flex-wrap:nowrap;flex-direction:row;align-items:center;gap:16px;background:#f4f0e7}
.lab-header.sample-header nav{display:flex;overflow:visible;max-height:none;flex-shrink:0}
.lab-header.sample-header .sample-back{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 16px;box-sizing:border-box;border:1px solid #211f1a;color:#211f1a;background:transparent;font:600 13px/1.3 "DM Sans",sans-serif;text-decoration:none;white-space:nowrap;transition:background .18s,color .18s}
.lab-header.sample-header .sample-back:hover{background:#211f1a;color:#f4f0e7}
.lab-header.sample-header .sample-back:focus-visible{outline:3px solid #512bd4;outline-offset:3px}
@media(max-width:700px){.lab-header.sample-header{padding:12px 16px;gap:12px}.lab-header.sample-header .lab-wordmark{flex:0 1 180px;max-width:48%}.lab-header.sample-header .sample-back{padding:10px 12px;font-size:12px}}
@media(prefers-reduced-motion:reduce){.lab-header.sample-header .sample-back{transition:none}}