:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#000;color:#fafafa}.game-shell{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem;padding:1rem}h1{margin:0;font-size:1.75rem;letter-spacing:-.02em}.hud{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1rem;color:#ffffffd9}canvas{background:#000;border:2px solid #444;display:block}.hint{margin:0;font-size:.85rem;color:#ffffff73}.restart-btn{margin-top:.5rem;padding:.5rem 1.5rem;font-size:1rem;background:#2196f3;color:#fff;border:none;border-radius:.5rem;cursor:pointer}.restart-btn:hover{background:#1976d2}