* {
    position: absolute;
}
html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  width: 100%;
  height: 100%;
}
body {
    background-color: #000000;
}
div {
    background-color: #FFFFFF;
    margin: 0px;
    border: 0px;
}
#gameOverScreen {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: red;
    font-size: 32px;
    text-align: center;
    white-space: pre-line;
    z-index: 9999; /* 가장 위로 띄우기 */
    background: rgba(0,0,0,0.7); /* 반투명 배경 추가 */
    padding: 20px;
    border-radius: 10px;
    display: none;
}
#titleScreen, #gameOverScreen {
  transition: opacity 0.5s ease;
  opacity: 1;
}