body {
  position: relative;
  margin: 0;
  background-color: #000;
  background-image: linear-gradient(180deg, #000000 0%, #222222 50%, #000000 100%);
  background-repeat: no-repeat;
    
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.display-flex{
  height: calc(100vh - 674px);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 600px;
}
.box {
  width: 600px;
  padding: 60px 50px;
  margin: 0 40px;
  border-radius: 10px;
  box-shadow: 0 5px 20px 0 rgba(0, 0, 0, 0.7);
  border: solid 1px rgba(255, 255, 255, 0.08);
  background-image: linear-gradient(125deg, #393b40 0%, #26282b 99%);
}
h1 {
  margin: 0;
  text-align: center;
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
}
.textbox {
   margin: 24px 0 0;
}
p {
  margin: 0 0 24px;
  line-height: 1.6;
  font-size: 1rem;
  color: #c0c0c0;
  text-align: center;
}
p:last-child {
  margin: 0;
}
dl {
  margin: 57px 0 0;
  color: #fff;
}
dd {
  margin: 0 0 16px;
}
dd:last-child {
  margin: 0;
}
.button {
  display: block;
  margin: 0;
  padding: 14px 0;
  text-align: center;
  border-radius: 8px;
  font-weight: 500;
  color: #fff;
  text-decoration: none;
  position: relative;
}
.button:last-child {
  margin-bottom: 0;
}
.button:before {
  content: '';
  width: 32px;
  height: 32px;
  position: absolute;
  background-size: contain;
  background-repeat: no-repeat;
  top: 10px;
  left: 20px;
}
.twitter {
  border-radius: 10px;
  box-shadow: 0 2px 3px 0 rgba(0, 0, 0, 0.16);
  border: solid 1px rgba(255, 255, 255, 0.3);
  background-color: #1da1f2;
}
.sns_x {
  padding: 0;
  height: 54px;
  line-height: 54px;
  margin: 0 10px 0 0;
  border-radius: 10px;
  box-shadow: 0 2px 3px 0 rgba(0, 0, 0, 0.16);
  border: solid 1px rgba(255, 255, 255, 0.3);
  background-color: #171717;
}
.twitter:before {
  background-image: url(/common/front/img/gt7/sns/icon_twitter.svg);
}
.instagram:before {
  background-image: url(/common/front/img/gt7/sns/icon_instagram.svg);
}
.sns_x:before {
  display: inline-block;
  vertical-align: middle;
  margin: 0 10px 0 0;
  background-image: url(/common/front/img/gt7/sns/icon_sns_x.png);
  position: relative;
  top: -4px;
  left: initial;
  width: 26px;
  height: 26px;
}
.instagram {
  border-radius: 10px;
  box-shadow: 0 3px 6px 0 rgba(0, 0, 0, 0.16);
  border: solid 1px rgba(255, 255, 255, 0.3);
  background-image: linear-gradient(95deg, #ed001a 1%, #c1009c 99%);
}
.preparation > span {
  background-color: #2f2f2f !important;
  border: solid 1px rgba(255, 255, 255, 0.2) !important;
  background-image: none !important;
}
.preparation :before,
.preparation > span > span {
  opacity: 0.5;
}