*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--sidebar-width: 260px;--toolbar-height: 44px;--statusbar-height: 28px;--bg: #f5f5f5;--surface: #ffffff;--border: #e0e0e0;--text: #212121;--text-secondary: #757575;--primary: #1565c0;--primary-light: #90caf9;--danger: #c62828;--radius: 6px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}html,body{height:100%;overflow:hidden;font-family:var(--font);font-size:14px;color:var(--text);background:var(--bg)}#app{display:grid;grid-template-rows:var(--toolbar-height) 1fr var(--statusbar-height);grid-template-columns:var(--sidebar-width) 1fr var(--sidebar-width);grid-template-areas:"toolbar toolbar toolbar" "left-sidebar canvas right-sidebar" "statusbar statusbar statusbar";height:100vh}.toolbar{grid-area:toolbar;display:flex;align-items:center;gap:8px;padding:0 12px;background:var(--surface);border-bottom:1px solid var(--border)}.toolbar__title{font-weight:600;font-size:15px;margin-right:auto}.left-sidebar{grid-area:left-sidebar;background:var(--surface);border-right:1px solid var(--border);overflow-y:auto}.canvas-area{grid-area:canvas;position:relative;overflow:hidden;background:var(--bg)}.canvas-area canvas{display:block;width:100%;height:100%}.right-sidebar{grid-area:right-sidebar;background:var(--surface);border-left:1px solid var(--border);overflow-y:auto}.statusbar{grid-area:statusbar;display:flex;align-items:center;gap:16px;padding:0 12px;font-size:12px;color:var(--text-secondary);background:var(--surface);border-top:1px solid var(--border)}.zoom-controls{display:flex;align-items:center;gap:2px}.btn-zoom{width:24px;height:24px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);cursor:pointer;font-size:14px;font-weight:600;color:var(--text);transition:background .15s}.btn-zoom:hover{background:var(--bg)}.btn-zoom:active{background:var(--border)}.tabs{display:flex;border-bottom:1px solid var(--border)}.tabs__tab{flex:1;padding:8px 4px;text-align:center;font-size:12px;font-weight:500;cursor:pointer;border:none;background:none;color:var(--text-secondary);border-bottom:2px solid transparent;transition:color .15s,border-color .15s}.tabs__tab:hover{color:var(--text)}.tabs__tab--active{color:var(--primary);border-bottom-color:var(--primary)}.view-tabs{position:absolute;top:0;left:0;right:0;display:flex;z-index:10;background:var(--surface);border-bottom:1px solid var(--border)}.view-tabs button{padding:6px 16px;font-size:12px;font-weight:500;cursor:pointer;border:none;background:none;color:var(--text-secondary);border-bottom:2px solid transparent}.view-tabs button:hover{color:var(--text)}.view-tabs button.active{color:var(--primary);border-bottom-color:var(--primary)}.room-manager{padding:6px 8px;border-bottom:1px solid var(--border)}.room-tabs{display:flex;flex-wrap:wrap;gap:4px;align-items:center}.room-tab{display:flex;align-items:center;gap:2px;padding:3px 6px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg);cursor:pointer;font-size:12px;min-width:0}.room-tab--active{background:var(--primary);border-color:var(--primary);color:#fff}.room-tab__name{max-width:90px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;cursor:pointer}.room-tab__btn{flex-shrink:0;background:none;border:none;cursor:pointer;padding:0 2px;font-size:11px;color:inherit;opacity:.7;line-height:1}.room-tab__btn:hover{opacity:1}.room-tab__btn--danger:hover{color:var(--danger)}.room-tab__btn:disabled{opacity:.3;cursor:not-allowed}.room-tab__add{font-size:11px;padding:3px 8px}.panel{border-bottom:1px solid var(--border)}.panel__header{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary);cursor:pointer;-webkit-user-select:none;user-select:none}.panel__header:after{content:"▾";transition:transform .15s}.panel--collapsed .panel__header:after{transform:rotate(-90deg)}.panel__body{padding:8px 12px 12px}.panel--collapsed .panel__body{display:none}.form-group{margin-bottom:10px}.form-group label{display:block;font-size:12px;color:var(--text-secondary);margin-bottom:3px}.form-group input,.form-group select{width:100%;padding:6px 8px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;font-family:var(--font);outline:none;transition:border-color .15s}.form-group input:focus,.form-group select:focus{border-color:var(--primary)}.form-row{display:flex;gap:8px}.form-row .form-group{flex:1}.btn{display:inline-flex;align-items:center;gap:4px;padding:6px 12px;font-size:12px;font-family:var(--font);font-weight:500;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);cursor:pointer;transition:background .15s,border-color .15s}.btn:hover{background:var(--bg)}.btn--primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn--primary:hover{background:#1255a1}.btn--small{padding:4px 8px;font-size:11px}.btn--danger{color:var(--danger);border-color:var(--danger)}.btn--danger:hover{background:#ffebee}.catalog-list{display:flex;flex-direction:column;gap:4px}.catalog-item{display:flex;align-items:center;gap:8px;padding:6px 8px;border:1px solid var(--border);border-radius:var(--radius);cursor:grab;font-size:12px;transition:background .15s,border-color .15s;-webkit-user-select:none;user-select:none}.catalog-item:hover{background:#e3f2fd;border-color:var(--primary-light)}.catalog-item__icon{width:28px;height:28px;background:var(--primary-light);border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0}.catalog-item__info{flex:1;min-width:0}.catalog-item__name{font-weight:500}.catalog-item__dims{font-size:11px;color:var(--text-secondary)}.catalog-category{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary);padding:8px 0 4px}.properties-empty{padding:20px 12px;text-align:center;color:var(--text-secondary);font-size:12px}.calc-result{margin-bottom:12px}.calc-result__title{font-weight:600;font-size:13px;margin-bottom:4px}.calc-table{width:100%;font-size:12px;border-collapse:collapse}.calc-table th,.calc-table td{padding:4px 6px;text-align:left;border-bottom:1px solid var(--border)}.calc-table th{color:var(--text-secondary);font-weight:500}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:var(--surface);border-radius:8px;padding:20px;min-width:360px;max-width:500px;box-shadow:0 8px 32px #0003}.modal__title{font-size:16px;font-weight:600;margin-bottom:16px}.modal__actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px}.drag-preview{position:fixed;pointer-events:none;z-index:100;opacity:.7;padding:6px 10px;background:var(--primary);color:#fff;font-size:12px;border-radius:var(--radius);white-space:nowrap}.tileset-item{border:1px solid var(--border);padding:8px;border-radius:var(--radius);margin-bottom:8px}.tileset-item--active{border-color:var(--primary);background:#e3f2fd}.tileset-item__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.tileset-item__name{font-weight:500;font-size:12px}.tileset-item__specs{font-size:11px;color:var(--text-secondary);margin-bottom:6px}.tileset-item__actions{display:flex;align-items:center;gap:6px}.tileset-item__actions input[type=color]{width:28px;height:24px;padding:0;border:1px solid var(--border);border-radius:var(--radius);cursor:pointer}.front-item{border:1px solid var(--border);padding:8px;border-radius:var(--radius);margin-bottom:8px}