/*全共通*/

.bgextend{
    animation-name:bgextendAnimeBase;
    animation-duration:1s;
    animation-fill-mode:forwards;
    position: relative;
    overflow: hidden;/*　はみ出た色要素を隠す　*/
    opacity:0;
}

@keyframes bgextendAnimeBase{
  from {
    opacity:0;
  }

  to {
    opacity:1;
}
}

/*中の要素*/
.bgappear{
    animation-name:bgextendAnimeSecond;
    animation-duration:2s;
    animation-delay: 0.6s;
    animation-fill-mode:forwards;
    opacity: 0;
}

@keyframes bgextendAnimeSecond{
    0% {
    opacity: 0;
    }
    100% {
    opacity: 1;
}
}

/*左から右*/
.bgLRextend::before{
    animation-name:bgLRextendAnime;
    animation-duration:1.4s;
    animation-fill-mode:forwards;
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #0056a8;;/*伸びる背景色の設定*/
}
@keyframes bgLRextendAnime{
    0% {
        transform-origin:left;
        transform:scaleX(0);
    }
    50% {
        transform-origin:left;
        transform:scaleX(1);
    }
    50.001% {
        transform-origin:right;
    }
    100% {
        transform-origin:right;
        transform:scaleX(0);
    }
}

/* スクロールをしたら出現する要素にはじめに透過0を指定　*/
.bgappearTrigger,
.bgLRextendTrigger{
    opacity: 0;
}