.build-main{width:min(100%,1040px);margin:auto;padding:12px}.build-intro{text-align:center;font-weight:800}.build-layout{display:grid;grid-template-columns:minmax(280px,1fr) minmax(260px,1fr);gap:16px}.floor-card,.preview-card{padding:12px}.build-layout h2{text-align:center;font-size:1.1rem;margin:4px 0 12px}.floor-grid{display:grid;grid-template-columns:repeat(5,minmax(44px,1fr));gap:6px;margin-top:14px}.floor-cell{min-width:44px;min-height:44px;aspect-ratio:1;padding:0;font-size:1.7rem}.floor-cell.below:not([aria-pressed=true]){background:var(--cream);border-style:dashed;color:var(--muted)}.build-count{font-size:1.1rem;text-align:center;font-weight:800}.build-tools{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.build-tools .nb-btn{flex:1 1 135px}.preview-card{display:flex;align-items:center;flex-direction:column}.build-preview{width:100%;height:300px;display:grid;place-items:center;background:var(--cream);border-radius:18px}.build-preview svg{width:100%;height:100%}.build-preview .empty-build{font-size:5rem;opacity:.55}.preview-card progress{width:min(100%,300px);height:22px;accent-color:var(--leaf)}.cube-goal{font-weight:900;text-align:center;min-height:1.5em}.build-status{text-align:center;min-height:2em;font-weight:800}.save-warning{padding:12px;border:2px solid var(--gold-edge);border-radius:16px;background:var(--glow);text-align:center;font-weight:800}nb-pager[hidden]{display:none}
@media(max-width:650px){.build-layout{grid-template-columns:1fr}.build-preview{height:240px}.build-main{padding:10px}.nb-bar .nb-title{flex:1;min-width:0}.nb-bar>a.nb-btn{padding:10px;font-size:1rem}}

.build-main{box-sizing:border-box}.build-layout>*{min-width:0}