body {
  font-family: 游ゴシック体, "Yu Gothic", YuGothic, "ヒラギノ角ゴシック Pro",
    "Hiragino Kaku Gothic Pro", メイリオ, Meiryo, Osaka, "ＭＳ Ｐゴシック",
    "MS PGothic", sans-serif;
}
.container-fluid {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: auto;
}
.title {
  color: darkred;
}
.notfound-img {
  width: 100px;
  height: 100px;
}