div.contents {
    display: flex;
    justify-content: center;
    flex-direction: row-reverse;
    background: #f2f2f2;
    position: relative;
}

div.contents_spacer--left,
div.contents_spacer--right {
    flex: 1;
    min-width: 12px;
}

div.contents_main {
    height: 100%;
    background: #ffffff;
    padding: 0px 21px;
}

@media (min-width: 1440px) {
    .contents_main {
        width: 1037px;
    }
}

@media (max-width: 1440px) {
    .contents_main {
        width: 774px;
    }
}