.entry-content a:not(.button):not(.wp-block-button__link):not(.gb-button) {
    text-decoration: none;
    background-image:
      linear-gradient(
          transparent 2px,
          #2ed392 2px,
          #2ed392 4px,
          transparent 4px
      ),
      linear-gradient(
          transparent 2px,
          #d8dce9 2px,
          #d8dce9 4px,
          transparent 4px
      );
    background-size: 0% 6px, 100% 6px;
    background-position: 0 bottom, 0 bottom;
    transition: background-size 0.3s ease-in-out;
    background-repeat: no-repeat;
       padding-bottom: 3px;
        font-size: 19px;
        font-weight: 600;
}

.entry-content a:hover:not(.button):not(.wp-block-button__link):not(.wp-block-button__link){
    color: #115cfa;
    background-size: 100% 6px;
}