.about {
    position: relative;
    height: vh;
    width: 100%;
    background-color:#f0ebda;
  }
  
  .about.container-fluid {
    padding: 5vh 5vw;
  }

  .about-nav {
    height: 20%;
    position: relative;
  }
  
  .about-nav-button {
    height: auto;
    padding: 1vh 0;
    position: absolute;
    top: 25%;
    left: 0;
    cursor : pointer;
  }

  .about-nav-button.button-parent {
    z-index: 2;
  }
  .about-nav:hover .button-child-1{
    -webkit-transform: translateX(100%);
            transform: translateX(100%);
  }
  .about-nav:hover .button-child-2{
    -webkit-transform: translateX(200%);
            transform: translateX(200%);
  }
  .about-nav:hover .button-child-3{
    -webkit-transform: translateX(300%);
            transform: translateX(300%);
  }
  .about-nav:hover .button-child-4{
    -webkit-transform: translateX(400%);
            transform: translateX(400%);
  }

  .about-content {
    height: 80%;
    width: 100%;
    /*position: absolute;
    top: 20%;*/
    padding: 5vh 0;
  }
  
  .about-content.active {
    -webkit-transform: translateX(0%);
    transform: translateX(0%);
    opacity: 1;
  }

  .about-content-sub-title {
    padding-top: 3vh;
    height: 15vh;
  }
  .about-content-sub-title div {
    height: 100%;
    padding: 3vh 0;
    display: flex;
    align-items: center;
    border-style: solid;
    border-width: 1vw;
    border-color: transparent;
    border-radius : 25px;
    cursor : pointer;
  }

  .about-content-sub-title div span {
    width: 100%;
    text-align: center;
  }

  #theme-1 {
    background-color: rgb(55, 229, 212);
    background-clip: padding-box;
    color: white;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: inset 0 0 50px rgba(255, 255, 255, 0);
  }

  #theme-1:hover {
    border-width: 0;
    box-shadow: inset 0 0 50px 10px rgb(0, 187, 235,0.5);
  }

  #theme-2 {
    background-color: rgb(0, 187, 235);
    background-clip: padding-box;
    color: white;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: inset 0 0 50px rgba(255, 255, 255, 0);
  }

  #theme-2:hover {
    border-width: 0;
    box-shadow: inset 0 0 50px 10px rgb(0, 255, 255, 0.5);
  }

  #theme-3 {
    background-color: rgb(14, 148, 255);
    background-clip: padding-box;
    color: white;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: inset 0 0 50px rgba(255, 255, 255, 0);
  }

  #theme-3:hover {
    border-width: 0;
    box-shadow: inset 0 0 50px 10px rgb(0, 0, 204, 0.5);
  }

  .about-content-sub {
    display: none;
  }
  
  /* animation classes */
  .animate {
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
  }
  
  .slideInLeft {
    -webkit-transform: translateX(-100%);
            transform: translateX(-100%);
    opacity: 0;
  }
  
  .slideInRight {
    -webkit-transform: translate3d(100%, 0, 0);
            transform: translate3d(100%, 0, 0);
    opacity: 0;
  }
  
  .scaleIn {
    -webkit-transform: scale(0);
            transform: scale(0);
  }
  
  .scaleInLeft {
    -webkit-transform: scaleX(0);
            transform: scaleX(0);
    -webkit-transform-origin: left center;
            transform-origin: left center;
  }
  
  .delay-1 {
    transition-delay: 0.05s;
  }
  
  .delay-2 {
    transition-delay: 0.1s;
  }
  
  .delay-3 {
    transition-delay: 0.15s;
  }
  
  .delay-4 {
    transition-delay: 0.2s;
  }
  
  .delay-5 {
    transition-delay: 0.25s;
  }