ボタン19

$BLOCK_NAME: '.button-19';

// 変数
$color_white: #fff;
$color_black: #000;
$easing_bg: cubic-bezier(0.215, 0.61, 0.355, 1);

#{ $BLOCK_NAME } {
  position: relative;
  display: block;
  max-width: 540px;
  padding: 45px 0;
  margin: 0 auto;
  background: $color_black;

  &::after {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    content: '';
    background: $color_white;
    border-bottom: 6px solid $color_black;
    transition: transform 0.3s $easing_bg;
    transform: scaleX(0);
    transform-origin: left;
  }

  &:hover::after {
    transform: scaleX(1);
  }

  & > span {
    position: relative;
    z-index: 1;
    display: block;
    font-family: 'Lato', sans-serif;
    font-size: 10px;
    color: $color_white;
    text-align: center;
    letter-spacing: 4px;
    transition: color 0.3s ease;
    &::after {
      position: absolute;
      top: 0;
      bottom: 0;
      left: 87%;
      display: block;
      width: 27px;
      height: 1px;
      margin: auto;
      content: '';
      background: $color_white;
      transition: all 0.3s ease;
    }
  }

  &:hover > span {
    color: $color_black;
    &::after {
      background: $color_black;
    }
  }
}