:root{--bg:#f7f8fc;--panel:#fff;--text:#24253a;--muted:#7c8094;--line:#e8eaf2;--accent:#6095f6;--teal:#24b5a6;--soft:#edf3ff;--rail:72px;--tree:218px;color-scheme:light}html[data-theme=dark]{--bg:#13151d;--panel:#1d202b;--text:#eff0f8;--muted:#9da1b3;--line:#303342;--soft:#242f43;color-scheme:dark}*{box-sizing:border-box;letter-spacing:0}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Segoe UI",sans-serif}button,input,select{font:inherit}button,a,input,select{outline-offset:4px}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}a{color:inherit;text-decoration:none}button{border:0;color:inherit;background:none}svg{width:18px;height:18px;stroke-width:1.7;flex:none}button svg,a svg{vertical-align:middle}.rail{position:fixed;inset:0 auto 0 0;width:var(--rail);background:var(--panel);border-right:1px solid 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