:root{--green: #1ed760;--green-hover: #3be477;--black: #000;--bg: #0f0f0f;--panel: #181818;--panel-raised: #242424;--panel-hover: #2c2c2c;--canvas: #101010;--text: #fff;--text-secondary: #b3b3b3;--text-muted: #7c7c7c;--border: rgba(255, 255, 255, .1);--error: #f3727f;color-scheme:dark;font-family:Inter,PingFang SC,Microsoft YaHei,sans-serif;font-synthesis:none}*{box-sizing:border-box}html,body{margin:0;height:100%;overflow:hidden}body{background:var(--bg);color:var(--text)}button,select,input,textarea{font:inherit;letter-spacing:0}button{color:inherit}button:focus-visible,select:focus-visible{outline:2px solid var(--green);outline-offset:2px}[hidden]{display:none!important}#app{display:flex;flex-direction:column;height:100vh;min-height:520px;background:var(--bg)}#app-header{flex:0 0 56px;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:0 16px;background:var(--black);border-bottom:1px solid 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ease}.button:hover{transform:translateY(-1px)}.button-primary{background:var(--green);color:#000}.button-primary:hover{background:var(--green-hover)}.button-secondary{background:var(--panel-raised);color:var(--text)}.button-home{background:transparent;color:var(--text-secondary);padding-inline:10px}.button-home:hover{background:var(--panel-hover);color:var(--text)}.button-secondary:hover,.button-quiet:hover{background:var(--panel-hover)}.button-quiet{background:transparent;color:var(--text-secondary);padding-inline:10px}.button-quiet:hover{color:var(--text)}.button-symbol{font-size:14px;line-height:1}#toolbar{flex:0 0 44px;min-height:44px;display:flex;align-items:center;gap:8px;padding:0 12px;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;background:var(--panel);border-bottom:1px solid var(--border)}#toolbar::-webkit-scrollbar{display:none}#app.is-starting #toolbar,#app.is-starting .header-actions,#app.is-starting 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.toolbar-select-field select{min-width:108px;height:30px;-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--border);border-radius:6px;padding:0 28px 0 10px;background:#0b0b0b;color:var(--text-secondary);font-size:12px;font-weight:650;cursor:pointer}#toolbar .toolbar-select-field select:hover{border-color:#ffffff38;color:var(--text)}#toolbar .toolbar-select-field select:focus-visible{border-color:var(--green)}.select-chevron{position:absolute;right:9px;top:50%;color:var(--text-muted);font-size:13px;line-height:1;pointer-events:none;transform:translateY(-58%)}.toolbar-select-field:hover .select-chevron{color:var(--text-secondary)}#body{flex:1 1 auto;min-height:0;position:relative;display:flex;background:var(--canvas)}.workspace-pane{min-width:0;min-height:0;display:flex;flex-direction:column}#code-pane-shell{flex:0 0 38%;border-right:1px solid var(--border);background:var(--panel)}#score-pane-shell{position:relative;flex:1 1 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svg.help-svg{position:static;inset:auto;display:block}#code-pane .cm-editor{height:100%;background:var(--panel);color:#e8e8e8}#code-pane .cm-scroller{overflow:auto}#code-pane .cm-gutters{background:#141414;color:#666;border-right:1px solid var(--border)}#code-pane .cm-activeLine,#code-pane .cm-activeLineGutter{background:#ffffff0b}#code-pane .cm-selectionBackground,#code-pane .cm-content ::selection{background:#1ed76038!important}#code-pane .cm-cursor{border-left-color:var(--green)}@media(max-width:900px){.brand-subtitle,.tool-label{display:none}#code-pane-shell{flex-basis:42%}.header-actions .button-quiet{display:none}}@media(max-width:680px){#app{min-height:460px}#app-header{padding:0 10px;gap:10px}.brand-name{font-size:16px}.header-actions{gap:4px}.header-actions .button{height:38px;padding:0 10px;font-size:12px}.header-actions 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