:root{--bg: #1a1d23;--panel: #21252e;--panel-2: #2a2f3a;--border: #353b48;--text: #e6e9ef;--muted: #8a92a3;--accent: #4a9eff;--accent-2: #3a7fd0}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.app{display:flex;height:100%}.sidebar{width:320px;min-width:320px;background:var(--panel);border-right:1px solid var(--border);overflow-y:auto;display:flex;flex-direction:column}.sidebar-head{display:flex;flex-direction:column;gap:10px;padding:14px 16px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--panel);z-index:3}.sidebar-head-top{display:flex;align-items:center;justify-content:space-between}.logo{font-weight:600;font-size:15px}.export-group{display:flex;gap:6px}.export-group .btn{flex:1}.savemenu{position:relative}.savemenu-panel{position:absolute;right:0;top:calc(100% + 6px);width:270px;background:var(--panel-2);border:1px solid var(--border);border-radius:8px;padding:10px;display:flex;flex-direction:column;gap:10px;box-shadow:0 8px 24px #0006;z-index:10}.savemenu-row{display:flex;gap:6px}.savemenu-name{flex:1;background:var(--panel);border:1px solid var(--border);border-radius:6px;color:var(--text);padding:5px 8px;font-size:13px}.savemenu-actions{display:flex;flex-wrap:wrap;gap:6px}.savemenu-list{display:flex;flex-direction:column;gap:4px;max-height:220px;overflow-y:auto;border-top:1px solid var(--border);padding-top:8px}.savemenu-item{display:flex;align-items:center;justify-content:space-between;padding:6px 8px;border-radius:6px;cursor:pointer;font-size:13px}.savemenu-item:hover{background:var(--panel)}.savemenu-item-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.savemenu-toast{position:absolute;right:0;top:calc(100% + 6px);background:var(--accent);color:#fff;padding:5px 10px;border-radius:6px;font-size:12px;white-space:nowrap;z-index:11;pointer-events:none}.panel{border-bottom:1px solid var(--border)}.panel-head{width:100%;text-align:left;background:none;border:none;color:var(--text);font-size:13px;font-weight:600;padding:12px 16px;cursor:pointer;display:flex;align-items:center;gap:8px}.chev{transition:transform .15s;display:inline-block;color:var(--muted)}.chev.open{transform:rotate(90deg)}.panel-body{padding:4px 16px 16px;display:flex;flex-direction:column;gap:14px}.field{display:flex;flex-direction:column;gap:6px}.field>label{font-size:12px;color:var(--muted)}.num-input{display:flex;align-items:center;gap:10px}.num-input input[type=range]{flex:1}.num-box{display:flex;align-items:center;gap:3px;background:var(--panel-2);border:1px solid var(--border);border-radius:6px;padding:2px 6px;min-width:74px}.num-box input{width:44px;background:none;border:none;color:var(--text);font-size:13px}.num-box .unit{font-size:11px;color:var(--muted)}.stepper-ctrl{display:flex;align-items:center;gap:8px}.stepper-ctrl input[type=range]{flex:1}.stepper-ctrl button{width:24px;height:24px;border-radius:6px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);cursor:pointer;font-size:15px;line-height:1}.stepper-val{min-width:18px;text-align:center;font-size:13px}.toggle-field,.seg-field{flex-direction:row;align-items:center;justify-content:space-between}.toggle-field>label,.seg-field>label{flex:1}.switch{width:40px;height:22px;border-radius:11px;border:none;background:var(--panel-2);position:relative;cursor:pointer;transition:background .15s}.switch.on{background:var(--accent)}.knob{position:absolute;top:2px;left:2px;width:18px;height:18px;border-radius:50%;background:#fff;transition:left .15s}.switch.on .knob{left:20px}.seg{display:flex;border:1px solid var(--border);border-radius:6px;overflow:hidden}.seg button{background:var(--panel-2);border:none;color:var(--muted);padding:5px 10px;cursor:pointer;font-size:12px}.seg button.active{background:var(--accent);color:#fff}.measure-row{background:var(--panel-2);border-radius:8px;padding:10px 12px}.measure-head{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted)}.measure-grid{display:grid;grid-template-columns:auto 1fr;gap:2px 12px;margin-top:8px;font-size:13px}.measure-grid span{color:var(--muted)}.add-row{display:flex;gap:8px}.hint{font-size:12px;color:var(--muted);margin:4px 0 0}.divider-item{display:flex;align-items:center;gap:8px;background:var(--panel-2);border-radius:6px;padding:6px 8px}.divider-label{font-size:11px;flex:1}.divider-item input[type=range]{flex:1.4}.divider-pos{font-size:11px;color:var(--muted);min-width:32px;text-align:right}.icon-btn{background:none;border:none;color:var(--muted);cursor:pointer;font-size:12px}.icon-btn:hover{color:#ff6b6b}.link{background:none;border:none;color:var(--accent);cursor:pointer;font-size:12px}.btn{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 12px;cursor:pointer;font-size:13px}.btn:hover{border-color:var(--accent)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover{background:var(--accent-2)}.btn.small{padding:5px 10px;font-size:12px;flex:1}.stage{flex:1;position:relative}.dims-readout{position:absolute;top:16px;left:50%;transform:translate(-50%);background:#21252ed9;border:1px solid var(--border);padding:6px 14px;border-radius:20px;font-size:13px;color:var(--muted)}.fit-btn{position:absolute;bottom:20px;right:20px;background:var(--panel);border:1px solid var(--border);color:var(--text);padding:8px 14px;border-radius:8px;cursor:pointer;font-size:13px}.fit-btn:hover{border-color:var(--accent)}.loading{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:var(--muted);font-size:14px}.btn:disabled{opacity:.45;cursor:default}.btn:disabled:hover{border-color:var(--border);background:var(--panel-2)}input[type=range]{accent-color:var(--accent);height:4px}input[type=number]{-moz-appearance:textfield}