:root{--ink:#202321;--muted:#6b706c;--line:#d9ddd9;--paper:#fff;--canvas:#f2f4f1;--soft:#f7f8f6;--red:#c43d2e;--red-dark:#9f2f23;--green:#13735a;--green-soft:#e8f4ef;--blue:#315d7b;--focus:#2563a6}*{box-sizing:border-box}html{background:var(--canvas)}body{background:var(--canvas);min-width:320px;min-height:100vh;color:var(--ink);letter-spacing:0;margin:0;font-family:Yu Gothic UI,Yu Gothic,Hiragino Kaku Gothic ProN,Meiryo,sans-serif}button,input{font:inherit}button{color:inherit}button:focus-visible{outline:3px solid color-mix(in srgb, var(--focus) 35%, transparent);outline-offset:2px}input:focus-visible{outline:3px solid color-mix(in srgb, var(--focus) 35%, transparent);outline-offset:2px}.app-shell{min-height:100vh}.topbar{z-index:5;border-bottom:1px solid var(--line);background:#fffffff5;justify-content:space-between;align-items:center;height:72px;padding:0 max(24px,50vw - 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