:root{--bg:#f3ecdc;--paper:#fbf7ee;--paper-edge:#e3d7bd;--ink:#3b3428;--sub:#776c5a;--night:#24304d;--night-ink:#f1ead8;--accent:#a2452f;--link:#2d4f7c;--focus:#d08a1e;--tab-h:60px;--radius:10px;--serif:"Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;--sans:"Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--ink);margin:0}body{font-family:var(--sans);-webkit-text-size-adjust:100%;font-size:16px;line-height:1.85}a{color:var(--link)}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}button{font:inherit}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.muted{color:var(--sub)}.small{font-size:13px}.error{color:var(--accent);margin:4px 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