:root{--ink:#222;--ink-2:#555;--ink-3:#8a857c;--paper:#f4f1ea;--paper-2:#ebe7de;--card:#fffdf8;--line:#d9d3c7;--accent:#1c64c8;--danger:#c92a2a;--radius:14px;--shadow:0 10px 30px #281e0a1f, 0 2px 6px #281e0a14;color:var(--ink);background:var(--paper);font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic UI,Meiryo,system-ui,sans-serif}*{box-sizing:border-box}html,body{-webkit-user-select:none;user-select:none;height:100%;margin:0;overflow:hidden}button{font:inherit;color:inherit}#stage{transition:filter .4s;position:fixed;inset:0}#stage.dim{filter:saturate(.6)brightness(.92)}#stage canvas{display:block}.screen{background:var(--paper);flex-direction:column;align-items:center;padding:48px 24px;display:flex;position:fixed;inset:0;overflow:auto}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.btn{border:2px solid 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