:root{--bg: #ffffff;--panel: #f8fafc;--border: #e2e8f0;--text: #0f172a;--muted: #64748b;--primary: #2563eb;--primary-soft: #dbeafe;--danger: #dc2626;--toolbar-bg: #0f172a;--toolbar-text: #e2e8f0;--radius: 6px;font-family:Segoe UI,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{color:var(--text);font-size:13px;overflow:hidden}.app{display:flex;flex-direction:column;height:100%}.app__body{display:flex;flex:1;min-height:0}.viewport{position:relative;flex:1;min-width:0;background:#e9edf2}.viewport canvas{display:block}.sidebar{display:flex;flex-direction:column;width:300px;min-width:300px;background:var(--panel);border-right:1px solid var(--border)}.properties{width:330px;min-width:330px;background:var(--bg);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.toolbar{display:flex;align-items:center;gap:8px;padding:0 12px;height:52px;background:var(--toolbar-bg);color:var(--toolbar-text);border-bottom:1px solid #000}.toolbar--placeholder{background:#f1f5f9}.toolbar__brand{display:flex;align-items:center;gap:8px;margin-right:8px;min-width:0}.toolbar__logo{font-size:18px;color:#60a5fa}.toolbar__title{font-weight:600;white-space:nowrap}.toolbar__model{color:#94a3b8;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:220px}.toolbar__group{display:flex;align-items:center;gap:6px}.toolbar__group--right{margin-left:auto}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--border);background:#fff;color:var(--text);padding:6px 12px;border-radius:var(--radius);font-size:13px;cursor:pointer;white-space:nowrap}.btn:hover:not(:disabled){background:#f1f5f9}.btn:disabled{opacity:.45;cursor:not-allowed}.toolbar .btn{background:#1e293b;border-color:#334155;color:var(--toolbar-text)}.toolbar .btn:hover:not(:disabled){background:#334155}.btn--primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn--primary:hover:not(:disabled){background:#1d4ed8}.btn--active{background:var(--primary);border-color:var(--primary);color:#fff}.btn--ghost{background:transparent;border-color:transparent}.btn--ghost:hover{background:#e2e8f0}.btn--sm{padding:3px 8px;font-size:12px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;padding:0;border:none;background:transparent;color:var(--text);cursor:pointer;border-radius:4px}.icon-btn:hover{background:#e2e8f0}.icon-btn--ghost{color:var(--muted)}.icon-btn--muted{color:#cbd5e1}.icon-btn--danger:hover{background:#fee2e2;color:var(--danger)}.dropdown{position:relative}.dropdown__menu{position:absolute;right:0;top:calc(100% + 4px);z-index:50;min-width:200px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 8px 24px #0000001f;padding:4px}.dropdown__label{padding:6px 10px;font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}.dropdown__item{display:block;width:100%;text-align:left;padding:7px 10px;border:none;background:none;cursor:pointer;border-radius:4px;color:var(--text);font-size:13px}.dropdown__item:hover{background:#f1f5f9}.dropdown__divider{height:1px;background:var(--border);margin:4px 0}.sidebar__tabs{display:flex;border-bottom:1px solid var(--border)}.sidebar__tab{flex:1;padding:10px 0;border:none;background:none;cursor:pointer;font-size:13px;color:var(--muted);border-bottom:2px solid transparent}.sidebar__tab--active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}.sidebar__content{flex:1;min-height:0;overflow:auto}.tree{padding:4px 0 12px;-webkit-user-select:none;user-select:none}.tree-item__row{display:flex;align-items:center;gap:4px;padding:2px 6px 2px 4px;cursor:pointer;border-radius:4px;margin:0 4px}.tree-item__row:hover{background:#eef2f7}.tree-item__row--selected{background:var(--primary-soft)}.tree-item__chevron{display:inline-flex;width:18px;align-items:center;justify-content:center;flex-shrink:0}.tree-item__leaf-icon{color:#94a3b8;width:14px;height:14px}.tree-item__label{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tree-item__actions{display:inline-flex;align-items:center;gap:2px;flex-shrink:0;opacity:0;transition:opacity .1s}.tree-item__row:hover .tree-item__actions{opacity:1}.tree-item__children{margin-left:0}.panel-empty{color:var(--muted);padding:20px 16px;font-size:13px;line-height:1.5}.properties__header{padding:12px 14px;border-bottom:1px solid var(--border)}.properties__title{font-weight:600;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.properties__subtitle{color:var(--muted);font-size:12px;margin-top:2px}.properties__multi{margin-top:6px;font-size:12px;color:var(--primary)}.properties__scroll{flex:1;overflow:auto;padding-bottom:20px}.prop-group__header{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;font-weight:600;font-size:12px;color:#334155;background:#f1f5f9;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.prop-group__count{font-weight:400;color:var(--muted)}.prop-row{display:flex;gap:10px;padding:5px 14px;border-bottom:1px solid #f1f5f9}.prop-row__name{width:45%;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.prop-row__value{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.search{padding:12px}.search__match{margin-bottom:12px}.search-condition{border:1px solid var(--border);border-radius:var(--radius);padding:8px;margin-bottom:8px}.search-condition__row{display:flex;gap:6px;align-items:center}.search-condition__row select{flex:1;min-width:0}.search-condition__value{width:100%;margin-top:6px;padding:6px 8px;border:1px solid var(--border);border-radius:4px;font-size:13px}.search__actions{display:flex;gap:8px;margin-top:4px}.search__results{margin-top:14px;border-top:1px solid var(--border);padding-top:10px}.search__results-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;font-weight:600}.search__results-actions{display:flex;gap:4px;align-items:center}.search__list{list-style:none;margin:0;padding:0;max-height:320px;overflow:auto}.search__item{display:flex;align-items:center;gap:6px;padding:5px 8px;border-radius:4px;cursor:pointer}.search__item:hover{background:#eef2f7}.search__item-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.search__item-type,.search__item-storey{font-size:11px;color:var(--muted);background:#f1f5f9;border-radius:3px;padding:1px 5px}.search__more{color:var(--muted);padding:6px 8px;font-size:12px}.settings{padding:12px}.settings__section{margin-bottom:18px}.settings__section h3{margin:0 0 8px;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}.field{display:block;margin-bottom:10px}.field__label{display:block;margin-bottom:4px;color:var(--muted);font-size:12px}.field--row{display:flex;align-items:center;justify-content:space-between}.field select,.field input[type=text]{width:100%;padding:6px 8px;border:1px solid var(--border);border-radius:4px;font-size:13px;background:#fff}.field input[type=range]{width:100%}.checkbox{display:flex;align-items:center;gap:8px;margin-bottom:8px;cursor:pointer}.info-row{display:flex;justify-content:space-between;padding:3px 0;color:var(--muted)}.info-row span:last-child{color:var(--text);font-variant-numeric:tabular-nums}.color-picker{position:relative;display:inline-block;width:18px;height:18px;vertical-align:middle}.color-picker__swatch{display:block;width:16px;height:16px;border-radius:3px;border:1px solid rgba(0,0,0,.2);cursor:pointer}.color-picker input[type=color]{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;background:#e9edf2d9;pointer-events:auto;padding:24px}.overlay__icon{font-size:40px;color:#94a3b8}.overlay__title{font-size:16px;font-weight:600}.overlay__hint{color:var(--muted);max-width:360px}.overlay--error .overlay__title{color:var(--danger)}.spinner{width:32px;height:32px;border:3px solid #cbd5e1;border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}