[CSS] 初期化設定

// 共通設定
* {
    margin: 0;
    padding: 0;
    border: 0;
    font: inherit;
    font-size: 100%;
    vertical-align: baseline;
    box-sizing: border-box;
    text-align: justify;
}

.clearfix {
    min-height: 1px;
    &::after {
        content: ".";
        display: block;
        clear: both;
        height: 0;
        visibility: hidden;
    }
}