メインページ/styles.css

.responsive-block-50{
box-sizing: border-box;
}

@media (min-width: 768px) {
.responsive-column-3{
column-count:3;
}
.responsive-column-3 > *, .responsive-column-3 > ul > li{
page-break-inside: avoid;
}
.responsive-block-33{
float:left;
width:33.33333333%;
}
.responsive-block-50{
float:left;
width:50%;
}
.padding-when-wide{
padding-right:10px;
padding-left:10px;
}
.float-when-wide{
float:left;
}
.nowide{
display:none;
}
}