body {
  background: url(./img/bg.png) fixed;
  background-position: center;
  text-align: center;
  background-size: cover;
  margin: 0;
  user-select: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

#app {
  position: relative;
  overflow: hidden;
}

.logo {
  width: 23.43vw;
  margin: 4vw auto;
}

.logo img {
  width: 100%;
  height: auto;
}

.submit {
  min-width: 46.875vw;
  display: block;
  border-radius: 2.5em;
  -webkit-border-radius: 2.5em;
  -moz-border-radius: 2.5em;
  -ms-border-radius: 2.5em;
  -o-border-radius: 2.5em;
  border: none;
  cursor: pointer;
  color: white;
  margin: auto;
  background: #7a0000;
  text-align: center;
  font-size: 4.375vw;
  line-height: 2.5;
  padding: 0 1em;
}

#_policy_,
#_policy_ .show {
  color: #000000;
}

#_policy_ .show {
  border-bottom-color: #000000;
}

#_policy_ .check {
  border-color: #000000;
}

#_policy_ .check::after {
  background: #000000;
}

#_policy_modal_ h1,
#_policy_modal_ .confirm {
  color: #000000 !important;
}

.back {
  display: block;
  position: fixed;
  color: white;
  font-size: 3.75vw;
  top: 4.6875vw;
  right: 4.6875vw;
  border: none;
  outline: none;
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  z-index: 10;
}

#app>div .content {
  min-height: calc(100vh - 50vw);
  display: flex;
  align-items: center;
  justify-content: center;
}

#app>div .content>div {
  max-width: 100%;
}

footer {
  display: block;
  font-size: 2vw;
  margin-bottom: 2em;
  color: #999999;
}

#loading footer {
  position: absolute;
  margin-bottom: 0;
  bottom: 2em;
  left: 0;
  right: 0;
}

@media screen and (min-width: 641px) {
  footer {
    font-size: 14px;
  }

  body {
    background-size: 640px 1236px;
  }

  .logo {
    width: 150px;
    margin: 30px auto;
  }

  .submit {
    min-width: 300px;
    font-size: 28px;
  }

  .back {
    font-size: 24px;
    top: 30px;
    right: 30px;
  }

  #app>div .content {
    min-height: calc(100vh - 320px);
  }
}