@charset "utf-8"; 
* {
    box-sizing: border-box;
}
body {
    margin: 0;
    padding: 0;
}

.wrapper {
    max-width: 500px;
    width: 100%;
    margin: 0 auto;
}

/*下部固定ボタン*/
.fixed-button-img {
position: fixed;
bottom: 0;
left: 50%;
transform: translateX(-50%);
width: 500px; 
opacity: 0;
pointer-events: none;
transition: opacity 0.3s ease;
z-index: 9999;
}
@media screen and (max-width: 500px){
    .fixed-button-img {
        width: 100%;
    }
}
.fixed-button-img.show {
opacity: 1;
pointer-events: auto;
}

.manga_wrapper{
    background-size: 100% auto;
    background-image: url(../images/bg.jpg);
    height: 100%;
    margin-top: -5px;
    padding: 24px;
}

footer{
    background-color: #132C8D;
    margin: 0 auto;
    text-align: center;
    padding: 24px 0;
}
footer img{
    margin-top: 20px;
}