:root{--ink:#23343d;--muted:#687d89;--blue:#087bb5;--nav:#173749;--bg:#f3f6f8;--line:#dce5ea;--teal:#147766;--amber:#9c610c;--red:#a8413b}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font:14px/1.65 -apple-system,BlinkMacSystemFont,'PingFang TC','Microsoft JhengHei',sans-serif}button,input,select,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:var(--blue);text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #0b89c5;outline-offset:3px}h1,h2,h3,p{margin:0}h1{font-size:27px;letter-spacing:-.03em;line-height:1.4}h2{font-size:18px;line-height:1.5}h3{font-size:15px}small{font-size:11px}button{border:0}.shell{display:grid;grid-template-columns:220px minmax(0,1fr);min-height:100vh}.sidebar{background:var(--nav);color:#e4eef3;padding:30px 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