:root{color-scheme:dark;--bg: #14171c;--panel: #1c2129;--panel-soft: #232a34;--border: #2c3440;--text: #e8ecf1;--muted: #9aa7b5;--accent: #4c9aff;--accent-soft: rgba(76, 154, 255, .16)}*{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0;height:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}#app{display:grid;grid-template-columns:300px 1fr;height:100%}#sidebar{background:var(--panel);border-right:1px solid var(--border);padding:18px 16px;overflow:auto;display:flex;flex-direction:column;gap:20px;scrollbar-width:thin}#sidebar h1{margin:0;font-size:1.15rem;letter-spacing:.01em}.subtitle{margin:4px 0 0;color:var(--muted);font-size:.85rem;overflow-wrap:anywhere}.block h2{margin:0 0 10px;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}.file-label{display:block;font-size:.85rem;margin-bottom:4px;color:var(--muted)}#ifc-input{width:100%;color:var(--text);font-size:.85rem}#drop-zone{margin-top:8px;border:1px dashed var(--border);border-radius:8px;padding:16px 10px;text-align:center;color:var(--muted);font-size:.9rem;transition:border-color .12s ease,color .12s ease,background .12s ease}#drop-zone.dragover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.toolbar{display:flex;flex-direction:column;gap:8px}button{appearance:none;border:1px solid var(--border);background:var(--panel-soft);color:var(--text);border-radius:7px;padding:9px 11px;font-size:.9rem;cursor:pointer;transition:border-color .12s ease,background .12s ease}button:hover{border-color:var(--accent);background:#28313d}button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}button:disabled{opacity:.5;cursor:not-allowed}.layer-list{display:flex;flex-direction:column;gap:2px}.layer-list:not(:empty)+.layer-list:not([hidden]){margin-top:10px;padding-top:10px;border-top:1px solid var(--border)}.layer-row{display:flex;align-items:center;gap:9px;padding:6px 8px;border-radius:7px;cursor:pointer;font-size:.9rem;user-select:none}.layer-row:hover{background:var(--panel-soft)}.layer-row input[type=checkbox]{accent-color:var(--accent);width:15px;height:15px;margin:0;cursor:pointer}.layer-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.layer-count{color:var(--muted);font-size:.78rem;font-variant-numeric:tabular-nums}#space-labels-toggle{margin-top:8px;border-top:1px solid var(--border);padding-top:10px;border-radius:0}#selection-panel{display:grid;grid-template-columns:auto 1fr;gap:7px 12px;margin:0;font-size:.9rem}#selection-panel dt{color:var(--muted)}#selection-panel dd{margin:0;word-break:break-word}#psets{margin-top:12px;display:flex;flex-direction:column;gap:8px}.pset-note{margin:0;color:var(--muted);font-size:.85rem}details.pset{border:1px solid var(--border);border-radius:8px;background:#1a2028;overflow:hidden}details.pset summary{cursor:pointer;padding:8px 10px;font-size:.85rem;font-weight:600;background:var(--panel-soft);list-style:none}details.pset summary:before{content:"▸ ";color:var(--accent)}details.pset[open] summary:before{content:"▾ "}details.pset summary::-webkit-details-marker{display:none}details.pset table{width:100%;border-collapse:collapse;font-size:.82rem}details.pset th,details.pset td{text-align:left;padding:5px 10px;border-top:1px solid var(--border);vertical-align:top;font-weight:400}details.pset th{color:var(--muted);width:45%}details.pset td{word-break:break-word}#status{margin:0;font-size:.85rem;color:var(--muted);white-space:pre-wrap}#viewport{position:relative;min-width:0;min-height:0;overflow:hidden;background:linear-gradient(180deg,#eef3f9,#e2e9f2 55%,#d5deea)}#viewport canvas{display:block;width:100%;height:100%}.labels-overlay{position:absolute;inset:0;pointer-events:none;overflow:hidden}.space-label{pointer-events:auto;cursor:pointer;padding:3px 9px;border-radius:999px;background:#ffffffd1;border:1px solid rgba(60,90,120,.35);color:#1d2a38;font-size:.75rem;font-weight:600;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;white-space:nowrap;backdrop-filter:blur(3px);transform:translateY(-4px);box-shadow:0 1px 4px #1423372e;transition:border-color .12s ease,background .12s ease}.space-label:hover{border-color:var(--accent)}.space-label.selected{background:#ffedd0;border-color:#ff9d2e}@media(max-width:760px){#app{grid-template-columns:1fr;grid-template-rows:auto 1fr}#sidebar{border-right:none;border-bottom:1px solid var(--border);max-height:46vh;gap:16px;padding:14px}.toolbar{flex-direction:row}.toolbar button{flex:1}}