.game-screen {
  -webkit-touch-callout:none; // リンク長押しのポップアップを無効化
  user-select: none;
  -webkit-user-select:none; // テキスト長押しの選択ボックスを無効化
}

.detail-img{
  padding: 0 0 12px 0;
}

.DLlink{
  font-size: 1.4em;
}

.ad{
  text-align: left;
  margin: 10px 0 10px 0;
}

.footer{
  position: absolute;
  bottom: 0;
  padding-bottom: 10px;
  
  width: 100%;
  text-align: left;
  font-size: 1.2em;
}

*,
*:before,
*:after {
  -webkit-box-sizing: inherit;
  box-sizing: inherit;
}

.btn,
a.btn,
button.btn {
  font-size: 1.2rem;
  position: relative;
  padding: 1.5rem 2rem;
  font-weight: 700;
  line-height: 1.5;
  display: inline-block;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
  text-align: center;
  vertical-align: middle;
  text-decoration: none;
  letter-spacing: 0.1em;
  color: #fff;
  background-color: #094;
  border-radius: 0.5rem;
  border-bottom: 5px solid #00662d;
}

a.btn-go {
  color: #fff;
  background-color: #094;
  border-bottom: 4px solid #00662d;
}
.btn-go:active {
  border-bottom: 2px solid #00662d;
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.30);
}
a.btn--shadow {
  -webkit-box-shadow: 0 3px 5px rgba(0, 0, 0, .3);
  box-shadow: 0 3px 5px rgba(0, 0, 0, .3);
}

@media screen and (max-width:519px) {
  .detail-img{
    width: 320px;
    height: auto;
  }
}