scss 全画面にボーダーをひく

Posted 2021-05-18

  &::before {
    content: "";
    display: block;
    position: absolute;
    background-color: $c_gray;
    
    background-size: 100vw auto;
    top: 0;
    left: 50%;
    display: block;
    width: 100vw;
    height: 1px;
    margin-left: -50vw;
  }