body {
  background-color: black;
  color: white;
  background-image: url("./img/figure.png");
  background-size: 100px auto; /* 画像を100px四方で表示 */
  background-repeat: repeat;
  background-position: center;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7); /* 背景の暗さ調整 */
  z-index: 0;
}

.links-wrapper {
  font-size: 2rem;
}

.links-wrapper a:visited {
  color: inherit; /* Disable link color change for visited links */
}

#main-wrapper {
  position: relative;
  z-index: 1;
}