[hidden] { display: none !important; }
#pcb-workspace { flex: 1; min-height: 0; display: grid; grid-template-columns: minmax(0,1fr); }
body.pcb-comparison #pcb-workspace { grid-template-columns: minmax(0,1fr) minmax(0,1fr); }
body.menu-open #pcb-workspace { grid-template-columns: minmax(0,1fr) 270px; }
body.pcb-comparison.menu-open #pcb-workspace { grid-template-columns: minmax(0,1fr) minmax(0,1fr) 270px; }
#pcb-menu { padding: 10px; overflow: auto; font-size: 12px; }
#pcb-menu h2 { padding: 5px 0; background: transparent; }
#layers { display: grid; gap: 5px; margin: 12px 0; }
#layer-presets { display: flex; gap: 5px; }
#compatibility { color: #60716b; font-size: 11px; overflow-wrap: anywhere; }
#diff-controls { min-height: 100px; }
#changes { max-height: 35vh; padding: 0; margin-top: 10px; }
#summary { font-size: 12px; }
.surface { background: #08151b; }
@media (max-width: 700px) {
 body.pcb-comparison #pcb-workspace { grid-template-columns: 1fr; grid-template-rows: minmax(0,1fr) minmax(0,1fr); }
 body.menu-open #pcb-workspace { grid-template-columns: minmax(0,1fr) 210px; }
 body.pcb-comparison.menu-open #pcb-workspace { grid-template-columns: minmax(0,1fr) 210px; grid-template-rows: minmax(0,1fr) minmax(0,1fr); }
 #pcb-menu { grid-column: 2; grid-row: 1 / -1; }
}