:root{--bg:#1a1625;--panel:#241f36;--text:#f1eefc;--muted:#a89fc9;--accent:#7c4dff;--success:#22c55e;--danger:#ef4444;color:var(--text);background:var(--bg);font:18px/1.4 Segoe UI,system-ui,sans-serif}*{box-sizing:border-box}html,body,#root{background:var(--bg);min-height:100svh;color:var(--text);margin:0}button{font:inherit;color:var(--text);background:var(--accent);cursor:pointer;touch-action:manipulation;border:none;border-radius:10px;padding:12px 18px}button:disabled{opacity:.45;cursor:not-allowed}button.active{outline:3px solid var(--text)}input{font:inherit;border:2px solid var(--accent);background:var(--panel);color:var(--text);border-radius:8px;padding:10px 12px}.app{flex-direction:column;min-height:100svh;display:flex}.screen{text-align:center;flex-direction:column;flex:1;justify-content:safe center;align-items:center;gap:16px;padding:24px;display:flex;overflow-y:auto}.race-grid,.level-grid{flex-wrap:wrap;justify-content:center;gap:14px;max-width:720px;display:flex}.race-card{border:3px solid #0000;flex-direction:column;gap:6px;min-width:160px;display:flex}.locked-badge{color:var(--muted);font-size:.75em}.grade-tabs{gap:8px;display:flex}.level-grid button{flex-direction:column;gap:4px;min-width:130px;display:flex}.settings-row{align-items:center;gap:10px;display:flex}.battle-screen{flex-direction:column;min-height:100svh;display:flex;position:relative}.back-button{color:var(--text);background:0 0;align-self:flex-start;margin:6px 10px;padding:6px 12px}.battle-layout{flex:1;justify-content:center;align-items:flex-start;display:flex;position:relative}.game-canvas{aspect-ratio:960/540;width:100%;max-width:min(960px,177.778svh - 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