@media(max-width:780px){
 /* Studio navigation occupies one compact progress rail. */
 .mobile-stage-tabs-v145{
   position:sticky!important;top:38px!important;z-index:26!important;background:var(--surface-nav)!important;
   display:flex!important;overflow-x:auto!important;gap:3px!important;padding:3px!important;margin:0 0 5px!important;scrollbar-width:none
 }
 .mobile-stage-tabs-v145::-webkit-scrollbar{display:none}
 .mobile-stage-tabs-v145 label{flex:0 0 auto!important;min-width:54px!important;min-height:34px!important;padding:4px 7px!important}
 /* Stage headers no longer repeat explanatory paragraphs above the work. */
 #studio .studio-stage-head-v145{min-height:38px!important;padding:5px 7px!important}
 #studio .studio-stage-head-v145 p,#studio .studio-stage-head-v145 .meta{display:none!important}
 /* CNT-1: editable brief values are primary. */
 #studio-brief .brief-origin{padding:6px!important}
 #studio-brief .brief-origin>div:last-child{font-size:8px!important;line-height:1.3}
 #studio-brief .brief-meta-row{grid-template-columns:repeat(2,minmax(0,1fr))!important;gap:4px!important}
 #studio-brief .brief-fields{grid-template-columns:1fr!important;gap:5px!important}
 #studio-brief .brief-field{padding:7px!important}
 /* CNT-2: claim list gets full phone width until selection. */
 #studio-evidence .evidence-shell{grid-template-columns:1fr!important}
 #studio-evidence .claim-list-panel{width:100%!important;max-width:none!important}
 /* CNT-3: writing surface gets useful vertical area. */
 #studio-text .unit-editor-body{min-height:48dvh!important}
 /* CNT-4: planning families scan first. */
 #studio-planning .plan-family-grid-v114{grid-template-columns:1fr!important;gap:5px!important}
 #studio-planning .plan-card-v114{margin-bottom:5px!important}
 /* CNT-5: selected artifact dominates viewport. */
 #studio-production.mobile-bench-open-v160 .production-workspace{min-height:52dvh!important}
 #studio-production .prod-canvas-wrap,#studio-production .design-canvas,#studio-production .carousel-editor{min-height:42dvh!important}
 #studio-production .production-commandbar{overflow-x:auto!important;flex-wrap:nowrap!important;scrollbar-width:none}
 #studio-production .production-commandbar>*{flex:0 0 auto!important}
 /* CNT-6/7: cards scan first; secondary prose is not permanently visible. */
 #studio-variants .output-card-v15 p,#studio-review .review-output-card p{display:none!important}
 #studio-variants .output-card-v15,#studio-review .review-output-card{min-height:52px!important;padding:7px!important}
 #studio-review .review-decision{padding-bottom:72px!important}
 /* Preserve hit targets while tightening visual chrome. */
 #studio button,#studio [role=button]{touch-action:manipulation}
 #studio button:focus-visible,#studio [role=button]:focus-visible{outline:2px solid currentColor!important;outline-offset:2px}
}