:root{font-family:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;color:#272332;background:#f5f4f8;font-synthesis:none;--purple:#7748f9;--line:#e8e5ee;--muted:#7b7589}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,.button,select{border:1px solid var(--line);background:#fff;color:inherit;border-radius:9px;padding:8px 12px;cursor:pointer;transition:background .15s,border-color .15s}button:hover:not(:disabled),.button:hover{background:#f3eeff;border-color:#cbbbfa}button:disabled{opacity:.4;cursor:default}button:focus-visible,select:focus-visible,.button:focus-within{outline:3px solid #cbb8ff;outline-offset:2px}button.primary{background:var(--purple);color:white;border-color:var(--purple)}[hidden]{display:none!important}.app-header{height:80px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 36px;background:#fff;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:#272332;font-weight:700;font-size:18px}.brand-mark{width:39px;height:39px;border-radius:12px;display:grid;place-items:center;background:var(--purple);color:#fff;font-size:33px;font-family:Georgia,serif;font-style:italic;line-height:1}.brand small{display:block;font-size:10px;font-weight:400;color:var(--muted);letter-spacing:2px;margin-top:4px}nav{display:flex;gap:4px;background:#f4f2f8;padding:4px;border-radius:12px}.tab{border:0;background:transparent;padding:9px 24px;color:var(--muted)}.tab.active{background:white;color:#6436d8;box-shadow:0 1px 5px #39226112}.file-actions{display:flex;gap:8px;align-items:center;font-size:13px}main{max-width:1540px;margin:36px auto;display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:26px;padding:0 36px}.editor-shell{min-width:0}.workspace-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:26px}.eyebrow{font-size:11px;letter-spacing:2px;color:#9a8aad}h1{font-size:25px;letter-spacing:-.5px;font-weight:650;margin:9px 0 10px}.workspace-heading p{font-size:13px;color:var(--muted);margin:0;line-height:1.7}.local-tag{font-size:11px;color:#8d839f;white-space:nowrap}.local-tag:before{content:'●';font-size:8px;color:#56a27b;margin-right:7px}.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:white;padding:12px 14px;border:1px solid var(--line);border-radius:13px 13px 0 0}.history{display:flex;gap:4px;padding-right:12px;border-right:1px solid var(--line)}.history button{border:0;padding:4px 9px;font-size:23px}.tools{display:flex;gap:5px;flex-wrap:wrap;flex:1}.tool{min-width:44px;height:40px;padding:4px 10px;font-family:Georgia,"Times New Roman",serif;font-size:22px;border-color:transparent}.tool.active{background:#f0e9ff;border-color:#cdbcfb;color:#6436d8}.tool small{font-family:inherit;font-size:10px}.zoom-label{font-size:11px;color:var(--muted);display:flex;align-items:center;gap:7px}.zoom-label select{font-size:12px;padding:5px}.symbol-bar{background:#fcfbfe;border:1px solid var(--line);border-top:0;display:flex;align-items:center;gap:5px;flex-wrap:wrap;padding:9px 16px;min-height:46px}.symbol-bar button{border:0;background:transparent;font-family:Georgia,"Times New Roman",serif;font-size:18px;padding:3px 10px}.symbol-bar label{display:flex;gap:7px;align-items:center;font-size:12px;margin-right:10px}.symbol-bar input[type=color]{width:28px;height:25px;padding:1px;border:1px solid var(--line);border-radius:5px;background:white}.symbol-bar span{font-size:11px;color:var(--muted);margin-left:auto}.symbol-bar #remove-shape{font-family:inherit;font-size:12px}#workspace{min-height:410px;overflow:auto;position:relative;background:#edecf2;border:1px solid var(--line);border-top:0;padding:26px;outline:none}#paper{position:relative;min-height:350px;width:100%;background:white;border-radius:3px;box-shadow:0 3px 15px #28203707}#canvas{display:block;touch-action:none}#overlay{position:absolute;inset:0;pointer-events:none;overflow:hidden}.slot{position:absolute;border:1px dashed #c8bfdf;border-radius:2px}.slot.active{border-color:var(--purple);background:#7748f908}.selection{position:absolute;background:#7748f927}.caret{position:absolute;width:2px;background:var(--purple);animation:blink 1s steps(1) infinite}.shape-selection{position:absolute;border:1px solid var(--purple)}.resize-handle{position:absolute;width:10px;height:10px;right:-17px;bottom:-17px;background:white;border:1px solid var(--purple);pointer-events:auto;cursor:nwse-resize;z-index:2}#empty-hint{position:absolute;top:calc(50% - 26px);left:0;right:0;text-align:center;color:#ada6ba;font-size:16px;pointer-events:none;line-height:1.8}#empty-hint small{font-size:12px}.editor-footer{border:1px solid var(--line);border-top:0;border-radius:0 0 13px 13px;background:white;padding:12px 16px;display:flex;justify-content:space-between;gap:20px;font-size:11px;color:var(--muted)}#status.error{color:#b34252}.guide{padding:26px 22px;background:#eeebf5;border-radius:14px;margin-top:117px;align-self:start}.guide-icon{font-size:30px;color:#8d6ac8}.guide h2{font-size:15px;font-weight:600;line-height:1.7}.guide p,.guide-note{font-size:12px;color:var(--muted);line-height:1.9}.shortcut{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#7f778e;margin-top:16px}kbd{font-size:10px;border:1px solid #dcd5e8;background:#faf8fe;padding:4px 7px;border-radius:5px;box-shadow:0 1px 0 #dcd5e8}.guide-note{margin-top:25px;padding-top:20px;border-top:1px solid #ddd6e8}#ime,#drawing-ime{position:fixed;left:-100px;top:0;width:1px;height:1px;opacity:.01;pointer-events:none}@keyframes blink{50%{opacity:0}}@media(max-width:1100px){main{grid-template-columns:1fr}.guide{display:none}.app-header{padding:0 20px}main{padding:0 20px}.local-tag{display:none}}@media(max-width:720px){.app-header{height:auto;padding:14px;flex-wrap:wrap;gap:14px}.brand{font-size:16px}nav{margin-left:auto}.tab{padding:8px 14px}.file-actions{width:100%;justify-content:flex-end}main{margin:22px auto;padding:0 12px}h1{font-size:22px}#workspace{padding:12px;min-height:320px}.workspace-heading{margin-bottom:18px}.toolbar{padding:9px}.tool{min-width:36px;padding:3px 6px}.zoom-label{margin-left:auto}.symbol-bar{padding:8px}.editor-footer{font-size:10px}.local-tag{display:none}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

.mode-button{white-space:nowrap;font-size:12px}.mode-button[aria-pressed=true]{background:#fff4e9;color:#7b4b23;border-color:#e6cbb0}.mode-button kbd{margin-left:6px}#formula-options{font-size:11px;min-height:36px}#formula-options span{margin-left:0;margin-right:auto}#formula-options button{font-family:inherit;font-size:12px}#context-menu,#dictionary-candidates{position:fixed;z-index:20;padding:5px;background:white;border:1px solid var(--line);border-radius:9px;box-shadow:0 5px 22px #24113a20}#context-menu button,#dictionary-candidates button{display:block;border:0;text-align:left;width:100%;font-size:13px}#dictionary-candidates small{color:var(--muted);margin-left:20px}dialog{width:min(480px,calc(100vw - 32px));border:1px solid var(--line);border-radius:16px;padding:24px;color:inherit;box-shadow:0 20px 100px #30204422}dialog::backdrop{background:#25163b44}.dialog-heading{display:flex;align-items:center;justify-content:space-between}.dialog-heading h2{font-size:20px;margin:0}.dialog-heading button{border:0;font-size:22px;padding:0 8px}dialog p{font-size:13px;color:var(--muted);line-height:1.7}.field{display:grid;gap:8px;font-size:13px;margin:22px 0 14px}.field input{border:1px solid var(--line);padding:11px;border-radius:8px;font-size:15px}.field input:focus{outline:2px solid #cfbaff}.replace-option{font-size:12px;color:var(--muted)}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}.dialog-actions button,.dialog-actions .button{font-size:12px}#dictionary-error{color:#b34252;min-height:20px}.dictionary-row{display:flex;align-items:center;gap:8px;margin:8px 0;padding-bottom:8px;border-bottom:1px solid var(--line)}.dictionary-row code{flex:1;font-size:14px}.dictionary-row button{font-size:12px}#dictionary-list{max-height:320px;overflow:auto}

#dictionary-candidates .candidate-active{background:#f0e9ff;color:#6436d8}

.node-handle{position:absolute;width:8px;height:8px;background:white;border:1px solid #7748f9;border-radius:50%}

#drawing-properties{flex-wrap:wrap;row-gap:8px}#drawing-properties input[type="number"]{width:56px;padding:4px;border:1px solid #d9d4e4;border-radius:5px}#start-arrow,#end-arrow{max-width:132px}

.snap-marker{position:absolute;width:12px!important;height:12px!important;margin:-6px 0 0 -6px;border:2px solid #7748f9;border-radius:50%;background:#fff9;box-shadow:0 0 0 2px #fff;z-index:5;pointer-events:none}.snap-marker>span{position:absolute;left:15px;top:-7px;white-space:nowrap;font-size:12px;color:#5f35d9;background:#fff;padding:2px 5px;border-radius:4px;border:1px solid #e2d8fa}.snap-help{font-size:12px;color:#777087}

#snap-settings{position:relative}#snap-settings summary{cursor:pointer;color:#69577f;user-select:none}.snap-settings-options{position:absolute;z-index:10;top:26px;left:0;display:grid;gap:10px;min-width:150px;padding:12px;background:#fff;border:1px solid #ddd5ed;border-radius:8px;box-shadow:0 6px 18px #28203716}.snap-settings-options label{white-space:nowrap}

.snap-settings-options{min-width:210px}.snap-settings-options label:has(input[type="number"]){display:flex;justify-content:space-between;gap:8px}.snap-settings-options small{color:#777087;font-size:11px}

#drawing-actions button,#drawing-actions select{font-family:inherit;font-size:12px}#drawing-actions{gap:8px}.shape-selection{border-color:#b5a1df}.shape-selection.active{border-color:var(--purple)}.selection-bounds{position:absolute;border:1px dashed #9b80cd}.drawing-marquee{position:absolute;border:1px dashed var(--purple);background:#7748f912}

#drawing-properties [data-style-state="mixed"]{outline:1px dashed #ae94d7;outline-offset:2px}#drawing-style-info{color:var(--muted);font-size:11px}#stroke-alpha,#fill-intensity{width:58px}

.selected-node{pointer-events:auto;background:#7748f9;box-shadow:0 0 0 2px #fff;cursor:move;z-index:4;margin:-4px 0 0 -4px}

.matrix-dimensions{display:grid;grid-template-columns:1fr 1fr;gap:18px}.matrix-dimensions input{width:100%;min-width:0}#matrix-error{color:#b34252;min-height:20px}

#matrix-options span{margin-left:0;margin-right:auto}#matrix-options select{font-size:12px}

#matrix-dialog.matrix-configure{width:min(760px,calc(100vw - 32px));max-height:90vh;overflow:auto}.matrix-option-row{display:flex;flex-wrap:wrap;gap:12px}.matrix-option-row label{display:flex;align-items:center;gap:6px;font-size:12px}.matrix-option-row select{padding:5px}#matrix-advanced-options fieldset{min-width:0;margin:16px 0 0;border:1px solid var(--line);border-radius:8px;padding:12px}#matrix-advanced-options legend{font-size:12px;color:var(--muted)}#matrix-advanced-options fieldset p{margin:0 0 10px;font-size:12px}#matrix-dot-grid{display:grid;gap:3px;overflow:auto}.matrix-dot{min-height:30px;min-width:26px;padding:0;font-size:19px;border-radius:4px}.matrix-dot[data-dot="0"]{background:#faf9fd}.matrix-line-groups{display:grid;grid-template-columns:1fr 1fr;gap:12px}.matrix-line-groups label{display:flex;align-items:center;justify-content:space-between;gap:6px;font-size:12px;margin:5px 0}.matrix-line-groups select{padding:4px}.matrix-line-groups small{color:var(--muted);font-size:12px}@media(max-width:540px){.matrix-line-groups{grid-template-columns:1fr}.matrix-option-row{gap:8px}}

#input-mode-choice{padding:4px 7px;font-size:12px}.mode-button[data-input-mode="chemical"]{background:#edf7ee;color:#286b3b;border-color:#bbdcc4}#chemical-input-help{font-size:11px;color:var(--muted);margin-right:8px}

.function-slots{display:flex;flex-wrap:wrap;gap:16px;font-size:13px}.function-slots label{display:flex;align-items:center;gap:6px}#function-error,#arithmetic-error{color:#b34252;min-height:20px}

#gradient-dialog{width:min(640px,calc(100vw - 32px));max-height:90vh;overflow:auto}.gradient-settings{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:16px 0}.gradient-settings label{display:flex;align-items:center;gap:7px;font-size:12px}.gradient-settings input[type=number]{width:80px;min-width:0}.gradient-settings select{min-width:0;padding:5px}.gradient-stop{display:flex;align-items:center;gap:9px;padding:8px 0;border-bottom:1px solid var(--line);font-size:12px}.gradient-stop input[type=number]{width:80px}.gradient-stop input[type=color]{width:35px;height:30px;padding:2px}.gradient-stop label{display:flex;align-items:center;gap:4px}#gradient-stops{margin-bottom:12px}#gradient-error{color:#b34252;min-height:20px}#gradient-endpoints{display:flex;gap:18px;flex-wrap:wrap;padding:8px 0}#gradient-endpoints label{display:flex;align-items:center;gap:6px;font-size:12px}#gradient-endpoints input[type=number]{width:65px}@media(max-width:540px){.gradient-settings{grid-template-columns:1fr}.gradient-stop{flex-wrap:wrap}}

.textbox-overlay{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none}.canvas-text-caret{animation:blink 1s steps(1) infinite}

.paste-settings{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted)}.paste-settings select{padding:5px;font-size:12px}

#dimension-properties{display:block}#dimension-property-fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px 18px;margin:10px 0}#dimension-property-fields label{margin:0;min-height:36px;gap:7px}#dimension-property-fields label>span:first-child{margin:0;min-width:74px;color:var(--muted)}#dimension-property-fields select,#dimension-property-fields input[type=number]{width:102px;min-width:0;font-size:12px;padding:5px}#dimension-property-fields label>span{margin:0;white-space:nowrap}.dimension-width-sample{width:60px;height:30px;flex-shrink:0}.dimension-property-actions{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.dimension-property-actions button{font-family:inherit;font-size:12px}#dimension-property-error{color:#b34252}

.dictionary-confirmation{margin:20px 0;border:1px solid var(--line);border-radius:8px;padding:12px}.dictionary-confirmation legend{font-size:12px;color:var(--muted)}.dictionary-confirmation p{margin:10px 0 0;font-size:12px}

/* Original rotation dialog and mode2 pivot. */
#rotation-dialog{width:min(480px,calc(100vw - 32px))}
.rotation-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.rotation-fields .field{margin:8px 0}
.rotation-fields input,.rotation-fields select{width:100%;box-sizing:border-box}
.rotation-center-fields{border:1px solid var(--line,#ddd);border-radius:10px;padding:12px 16px;margin:18px 0}
.rotation-center-fields small{display:block;margin-top:8px;color:var(--muted,#666)}
.rotation-options{display:grid;gap:12px}
.rotation-options label{display:flex;align-items:center;gap:8px}
.rotation-count-field input{width:5rem}
#rotation-error{color:#b3261e;min-height:1.2em}
#rotation-node-help{font-size:.85rem;color:var(--muted,#666)}
.rotation-adjust-bar{background:#f3efff;border-color:#d7c9ff}
.rotation-pivot{position:absolute;width:18px;height:18px;margin:-9px;border:2px solid #6941c6;border-radius:50%;box-sizing:border-box;pointer-events:none;background:#ffffffcc;z-index:8}
.rotation-pivot::before,.rotation-pivot::after{content:"";position:absolute;background:#6941c6}
.rotation-pivot::before{width:26px;height:2px;left:-6px;top:6px}
.rotation-pivot::after{height:26px;width:2px;left:6px;top:-6px}
@media(max-width:480px){.rotation-fields{grid-template-columns:1fr}.rotation-adjust-bar{flex-wrap:wrap}}