/*  こっから下漫画用 */
section{
    padding:0;
}
section img{
    width:auto;
    height:auto;
    max-width:inherit;
}

html,
body,
section,
#viewer,
#viewer img{
    height:100%;
}

#viewer .sheet{
    height:calc(98% - 100px);
    margin:20px 0 10px 0;
    width:100%;
    overflow:hidden;
    max-height:1440px;
}

#viewer img{
    cursor:pointer;
    display:block;
    margin:0 auto;
    box-shadow:0px 1px 4px black;
    -webkit-user-select:none;
    -moz-user-select:none;
    -ms-user-select:none;
    user-select:none;
    max-height:1440px;
}

#viewer #page-link{
    clear:both;
    text-align:center;
}
#viewer #page-link .btn.active{
    border: inset 2px #086A87;
    background-color:#2E9AFE;
}

@media screen and (max-width:500px){
    #viewer img{
        max-width:480px;
        width:90%;
        height:auto;
    }
    #viewer .sheet{
        height:auto;
    }
}

button{
    padding:0.25em 0.5em;
    border:3px solid rgb(64,64,64);
    margin:0.25em 0;
}