:root{--imt-bg:#15171c;--imt-panel:#1c1f26;--imt-raised:#242936;--imt-border:#2d3342;--imt-text:#e6e8ee;--imt-muted:#9aa1ad;--imt-accent:#34d399;--imt-accent-soft:#34d39924;--imt-ok:#3fb27f;--imt-danger:#e5534b;--imt-canvas-bg:#0e1014;--imt-font:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif}html,body{height:100%;margin:0;padding:0;overflow:hidden}body{background:var(--imt-bg)}.imt-app{background:var(--imt-bg);color:var(--imt-text);font-family:var(--imt-font);user-select:none;font-size:14px;display:flex;position:fixed;inset:0}.imt-sidebar{background:var(--imt-panel);border-right:1px solid var(--imt-border);flex-direction:column;flex-shrink:0;width:216px;transition:width .18s;display:flex;overflow:hidden}.imt-sidebar.collapsed{width:54px}.imt-sidebar-head{border-bottom:1px solid var(--imt-border);white-space:nowrap;cursor:pointer;justify-content:space-between;align-items:center;padding:14px 12px 10px;transition:background .15s;display:flex}.imt-sidebar-head:hover{background:var(--imt-raised)}.imt-logo{align-items:center;gap:8px;font-size:14px;font-weight:700;display:inline-flex}.imt-sidebar.collapsed .imt-sidebar-head{justify-content:center;padding-left:0;padding-right:0}.imt-nav{flex:1;padding:10px 8px;overflow-y:auto}.imt-nav-item{width:100%;color:var(--imt-muted);cursor:pointer;text-align:left;white-space:nowrap;background:0 0;border:none;border-radius:8px;align-items:center;gap:10px;margin-bottom:2px;padding:9px 10px;font-size:13.5px;transition:background .15s,color .15s;display:flex}.imt-nav-item:hover{background:var(--imt-raised);color:var(--imt-text)}.imt-nav-item.active{background:var(--imt-accent-soft);color:#fff}.imt-nav-item.soon{opacity:.55;cursor:default}.imt-nav-item.soon:hover{color:var(--imt-muted);background:0 0}.imt-nav-icon{flex-shrink:0;font-size:16px}.imt-nav-label{align-items:center;gap:6px;display:inline-flex;overflow:hidden}.imt-nav-label em{color:var(--imt-muted);border:1px solid var(--imt-border);background:var(--imt-raised);border-radius:999px;padding:1px 6px;font-size:10px;font-style:normal}.imt-sidebar.collapsed .imt-logo-text,.imt-sidebar.collapsed .imt-nav-label{display:none}.imt-sidebar.collapsed .imt-nav-item{justify-content:center;padding:9px 0}.imt-sidebar-foot{border-top:1px solid var(--imt-border);color:var(--imt-muted);white-space:nowrap;padding:10px 12px;font-size:11.5px}.imt-main{flex-direction:column;flex:1;min-width:0;display:flex}.imt-topbar{background:var(--imt-panel);border-bottom:1px solid var(--imt-border);flex-shrink:0;align-items:center;gap:10px;height:52px;padding:0 16px;display:flex}.imt-title{font-size:15px;font-weight:600}.imt-topbar-actions{align-items:center;gap:8px;margin-left:auto;display:flex}.imt-topbar-sep{background:var(--imt-border);width:1px;height:22px;margin:0 4px}.imt-workbench{flex:1;min-height:0;display:flex}.imt-canvas-wrap{background:var(--imt-canvas-bg);flex:1;justify-content:center;align-items:center;min-width:0;display:flex;position:relative;overflow:hidden}#imt-canvas{cursor:crosshair;touch-action:none;outline:none;width:100%;height:100%;position:absolute;inset:0}.imt-sel-label{pointer-events:none;border:1px solid var(--imt-border);color:#fff;z-index:3;background:#0c0e13d1;border-radius:6px;padding:2px 8px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;position:absolute;transform:translateY(-130%)}.imt-empty{text-align:center;z-index:4;flex-direction:column;justify-content:center;align-items:center;gap:10px;display:flex;position:absolute;inset:0}.imt-empty-icon{opacity:.7;font-size:56px}.imt-empty-title{font-size:20px;font-weight:600}.imt-empty-sub{color:var(--imt-muted);font-size:13px}.imt-empty-actions{gap:10px;margin-top:8px;display:flex}.imt-empty-hint{color:var(--imt-muted);margin-top:6px;font-size:12px}.imt-empty-hint kbd{background:var(--imt-raised);border:1px solid var(--imt-border);border-radius:4px;padding:1px 6px;font-family:inherit;font-size:11px}.imt-canvas-hint{border:1px solid var(--imt-border);color:var(--imt-muted);white-space:nowrap;z-index:3;pointer-events:none;background:#0c0e13cc;border-radius:999px;padding:4px 12px;font-size:12px;position:absolute;bottom:10px;left:50%;transform:translate(-50%)}.imt-panel{background:var(--imt-panel);border-left:1px solid var(--imt-border);flex-direction:column;flex-shrink:0;gap:18px;width:268px;padding:14px;display:flex;overflow-y:auto}.imt-section{flex-direction:column;gap:8px;display:flex}.imt-section-title{color:var(--imt-muted);letter-spacing:.06em;text-transform:uppercase;margin:0;font-size:12px;font-weight:600}.imt-chips{flex-wrap:wrap;gap:6px;display:flex}.imt-chip{border:1px solid var(--imt-border);background:var(--imt-raised);color:var(--imt-text);cursor:pointer;border-radius:8px;padding:6px 12px;font-size:12.5px;transition:border-color .15s,background .15s}.imt-chip:hover{border-color:var(--imt-accent)}.imt-chip.active{border-color:var(--imt-accent);background:var(--imt-accent-soft);color:#fff}.imt-btn-row{flex-wrap:wrap;gap:6px;display:flex}.imt-btn{border:1px solid var(--imt-border);background:var(--imt-raised);color:var(--imt-text);cursor:pointer;border-radius:8px;padding:7px 14px;font-size:13px;transition:border-color .15s,background .15s,opacity .15s}.imt-btn:hover:not(:disabled){border-color:var(--imt-accent)}.imt-btn:disabled{opacity:.45;cursor:default}.imt-btn-sm{padding:5px 10px;font-size:12px}.imt-btn-block{width:100%}.imt-btn-primary{background:var(--imt-accent);border-color:var(--imt-accent);color:#fff;font-weight:600}.imt-btn-primary:hover:not(:disabled){filter:brightness(1.1);border-color:var(--imt-accent)}.imt-sel-info{color:var(--imt-muted);background:var(--imt-raised);border:1px solid var(--imt-border);border-radius:8px;padding:8px 10px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px}.imt-field{flex-direction:column;gap:6px;margin-bottom:8px;display:flex}.imt-field label{color:var(--imt-muted);justify-content:space-between;font-size:12px;display:flex}.imt-field label b{color:var(--imt-text);font-family:ui-monospace,monospace}.imt-field select{border:1px solid var(--imt-border);background:var(--imt-raised);color:var(--imt-text);cursor:pointer;border-radius:8px;padding:7px 10px;font-size:13px}.imt-field input[type=range]{width:100%;accent-color:var(--imt-accent)}.imt-statusbar{height:30px;color:var(--imt-muted);border-top:1px solid var(--imt-border);background:var(--imt-panel);flex-shrink:0;align-items:center;gap:18px;padding:0 14px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;display:flex}.imt-status-spacer{flex:1}.imt-app[data-theme=light]{--imt-bg:#f4f5f8;--imt-panel:#fff;--imt-raised:#eceef2;--imt-border:#d9dde5;--imt-text:#1d222b;--imt-muted:#6a7280;--imt-accent:#2f6fed;--imt-accent-soft:#2f6fed1f;--imt-ok:#1f9d6a;--imt-danger:#d6453d;--imt-canvas-bg:#e7eaef;color-scheme:light}.imt-toast{background:var(--imt-raised);border:1px solid var(--imt-border);color:var(--imt-text);z-index:100;border-radius:10px;padding:9px 18px;font-size:13px;transition:opacity .2s;position:fixed;bottom:44px;left:50%;transform:translate(-50%);box-shadow:0 8px 28px #00000073}.imt-toast[hidden]{display:none}.imt-app.dragging .imt-canvas-wrap{box-shadow:inset 0 0 0 3px var(--imt-accent)}