:root{--blue:#0a5992;--ink:#19232e;--muted:#52616f;--line:#dce5eb;--paper:#fff;--wash:#f5f7f9;--gutter:20px;--font:"Noto Serif JP","Songti TC","PMingLiU",serif;--ease:cubic-bezier(.2,.8,.2,1)}*{box-sizing:border-box}html{background:var(--paper)}body{color:var(--ink);font:16px/1.65 var(--font);-webkit-font-smoothing:antialiased;margin:0}button,input,textarea{font:inherit}button,a,input{touch-action:manipulation;-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{color:inherit;cursor:pointer;background:0 0;border:0}button:disabled{cursor:not-allowed;opacity:.45}:is(button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible){outline:3px solid var(--blue);outline-offset:3px}h1,h2,h3,p{margin:0}svg{stroke-width:1.7px;flex-shrink:0}.app-shell{height:100vh;flex-direction:column;height:100dvh;min-height:600px;display:flex}.topbar{background:var(--paper);border-bottom:1px solid 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