html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    border: none;
    touch-action: manipulation;
}

body {
    background-color: #ffffff;
}

.main {
    width: 750px;
    display: block;
    margin: 0 auto;
}

.main img{
    width: 100%;
    display: block;
    margin: 0 auto;
}

@media screen and (max-width: 768px) {
    .main {
        width: 100%;
    }
}

.line_btn{
    display: block;
    margin: 0 auto;
}

#size{
    position: relative;
}

.size_btn {
    position: absolute;
    width: 63%;
    display: block;
    right: 18%;
    bottom: 12%;
}