*{box-sizing:border-box;margin:0;padding:0}body{background:#0a0a0f;margin:0;overflow:hidden}.app{color:#e0e0e0;background:#0a0a0f;flex-direction:column;height:100vh;display:flex}.header{text-align:center;background:#12121a;border-bottom:2px solid #2a2a3a;padding:16px 0}.header h1{letter-spacing:2px;color:#c8b8e8;text-transform:uppercase;margin:0;font-family:Segoe UI,system-ui,sans-serif;font-size:32px;font-weight:700}.game-container{flex:1;justify-content:center;align-items:center;padding:24px;display:flex}.game-frame{background:#000;border:2px solid #2a2a3a;border-radius:8px;width:960px;max-width:100%;height:600px;max-height:calc(100vh - 120px);overflow:hidden}@media (width<=768px){.header{padding:8px 0}.header h1{font-size:20px}.game-container{padding:0}.game-frame{border:none;border-radius:0;width:100vw;height:calc(100vh - 52px);max-height:none}}