.plan-tabs{display:flex;gap:.5rem;margin-bottom:.75rem;flex-wrap:wrap}
.plan-tabs button{border:1px solid #ced4da;background:#fff;border-radius:.4rem;padding:.55rem 1rem;color:#344054}
.plan-tabs button.active{background:#166b5b;color:#fff;border-color:#166b5b}
.plan-panel{position:relative;background:#fbfcfc;border:1px solid #d8e2e2;border-radius:.5rem;overflow:hidden}
#plan-svg{display:block;width:100%;height:min(68vh,740px);min-height:420px;cursor:grab;touch-action:none;background-image:linear-gradient(#e8eeee 1px,transparent 1px),linear-gradient(90deg,#e8eeee 1px,transparent 1px);background-size:24px 24px;background-color:#fff}
#plan-svg.dragging{cursor:grabbing}
.plan-layer path{fill:none;stroke:#6c757d;stroke-width:1.5;vector-effect:non-scaling-stroke;stroke-linejoin:round;stroke-linecap:round}
.layer-structure path{stroke:#354757;stroke-width:2}
.layer-walls path{stroke:#182b36;stroke-width:2}
.layer-columns path{stroke:#7a4754;stroke-width:2}
.layer-slabs path{stroke:#a0a9af;stroke-width:1}
.layer-doors path{stroke:#ba6832}
.layer-windows path{stroke:#2579a9}
.layer-stairs path{stroke:#9d6c20}
.layer-spaces path{stroke:#63a886;stroke-dasharray:5 3}
.layer-furniture path{stroke:#a8819a}
.plan-layer text{fill:#3e8064;text-anchor:middle;pointer-events:none}
.plan-layer[hidden]{display:none}
.layer-toggle{font-size:.9rem;white-space:nowrap;cursor:pointer}
.plan-message{position:absolute;left:.8rem;bottom:.8rem;margin:0;padding:.3rem .65rem;border-radius:.25rem;background:rgba(255,255,255,.9);font-size:.82rem;color:#475467;pointer-events:none}