.uspw_socail_share{
    width: 270px;
    height: 60px;
    border: none;
    background: #ffe4c4;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
  }

.uspw_socail_share::before,
.uspw_socail_share::after {
    content: "";
    position: absolute;
    width: 0;
    height: 3px;
    background-color: #000;
    transition: width 1s ease-in-out;
  }

.uspw_socail_share:before {
    
    top: 0;
    left: 0;
  }

.uspw_socail_share:after {
    
    bottom: 0;
    right: 0;
  }

.uspw_socail_share:hover:before,
.uspw_socail_share:hover:after {
    width: 100%;
  }

  .letters {
    width: 50px;
    height: 50px;
    perspective: 600px;
  }

  .card {
    width: 100%;
    height: 100%;
    position: relative;
    transition: transform 1s ease-in-out;
    transform-style: preserve-3d;
  }

  .card_face {
    position: absolute;
    height: 100%;
    width: 100%;
    backface-visibility: hidden;
    font-size: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-weight: 600;
    transform: rotateX(0deg);
  }

  .back {
    transform: rotateY(180deg);
  }

  .uspw_socail_share:hover .card {
    transform: rotateY(180deg);
  }
.card_face.back a {
    padding-top: 12px;
}