*{margin:0;padding:0;box-sizing:border-box}body,html{width:100%;height:100vh;overflow:hidden}:root{--blockSize: 50px}.body{background:url(/images/space.webp) no-repeat center center;background-size:cover;width:100%;height:100%;object-fit:cover;position:relative}.jet{display:block;background:url(/images/jet.png) no-repeat center center;background-size:cover;width:var(--blockSize);height:var(--blockSize);position:absolute;top:0;left:0}.enemy{position:absolute;width:var(--blockSize);height:var(--blockSize);background:url(/images/enemy.png) no-repeat center center;background-size:cover;transform:rotate(180deg)}.shot{position:absolute;width:4px;height:10px;background:linear-gradient(to bottom,#ff0,orange);border-radius:50%;box-shadow:0 0 5px 2px #ffff00b3}.game-over-message{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#fff;font-size:48px;font-family:Arial,sans-serif;text-shadow:2px 2px 4px rgba(0,0,0,.5);z-index:1000}.restart-button{position:absolute;top:60%;left:50%;transform:translate(-50%,-50%);padding:10px 20px;font-size:24px;font-family:Arial,sans-serif;color:#fff;background-color:#ff4757;border:none;border-radius:5px;cursor:pointer;box-shadow:2px 2px 4px #0000004d;transition:background-color .3s ease}.restart-button:hover{background-color:#ff6b81}.restart-button:active{background-color:#ff4757;box-shadow:1px 1px 2px #0000004d}