html{
  height: 100%;

  background-repeat: no-repeat;
  background-size: contain;
  background-attachment: fixed;
  background-position: unset;
  background-color: black;
}
body {
  min-height: 100%;
  margin: 0px;
  padding: 0px;
  height: auto !important;
  height: 100%;
  position: relative;
  background-color: transparent;
  color: white;
  font-family: "WinYuGothic", "YuGothic", "メイリオ", Meiryo, Avenir-Light, Futura, Century Gothic, -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", sans-serif;
}

/* #bg_main {
} */


#main {
  min-width: 320px;
  max-width: 1100px;
  width: 100%;
  flex-direction: column;
  min-height: calc(100vh - 60px);
  margin-left: auto;
  margin-right: auto;
  padding-bottom: 2px;
}

#top_logo {
  width: 75%;
  height: auto;
  display: block;
  margin: 0px auto;
}

.main_ttl {
    color: orange;
}

.div_previous_links {
  margin-top: 20px;
}

.up_board {
    /* border: #FFFFFF 1px solid; */
    line-height: 1.5;
    margin: 20px auto;
    padding: 10px 2px 2px 5px;
    width: 300px;
    height: 45px;
    word-break: break-all;
}



footer {
  min-width: 320px;
  max-width: 1100px;
  position: relative;
  width: 100%;
  height: 60px;
  bottom: 0;
  text-align: center;
  /* background-color: black; */
  padding: 20px 5px;
  margin-left: auto;
  margin-right: auto;
}

.desc {
  text-align: center;
  font-size: 24px;
  font-size: 2.4rem;
}

.release_desc {
  margin: 10px 0 0 0;
  font-size: 28px;
  font-size: 2.8rem;
}

.ttl {
  display: block;
  font-weight: normal;
  margin: 0;
  width: 90%;
  margin: 0 5%;
  font-size: 36px;
  font-size: 3.6rem;
  text-align: center;
}

.menu {
  margin-top: 30px;
  font-size: 28px;
  font-size: 2.8rem;
  color: white;
}

.menu ul {
  text-align: center;
  list-style-type: none;
  padding: 0;
}

.menu li {
  margin-top: 20px;
}

.menu a:link,
.menu a:visited,
.menu a:active {
  color: magenta;
}

.shousai {
  margin-top: 25px;
}



@media screen and (max-width: 960px) and (min-width: 100px) {

  .desc {
    font-size: 18px;
    font-size: 1.8rem;
  }

  .release_desc {
    margin: 15px 0 0 0;
    font-size: 20px;
    font-size: 2.0rem;
  }

  .ttl {
    font-size: 23px;
    font-size: 2.3rem;
  }


}

@media screen and (min-width: 361px){

  footer {
    font-size: 12px;
  }


}

@media screen and (max-width: 360px) and (min-width: 321px){

  footer {
    font-size: 11px;
  }

}

@media screen and (max-width: 320px){

  footer {
    font-size: 10px;
  }

}