header {
    position: fixed;
    background-color: rgba(0,0,0,0.6);
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 40px;
  }
  
  nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: row;
  }
  
  nav ul li {
    margin: 0 24px;
  }
  
  nav ul li a {
    text-decoration: none;
    color: #fff;
    font-size: 1.5em;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: bold;
    position: relative;
    transition: all 0.3s ease;
  }

  nav ul li a::before {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #fff;
    transform: scaleX(0);
    transition: all 0.3s ease;
  }
  
  nav ul li a:hover::before {
    transform: scaleX(1);
  }
  
  .Logo{
    text-decoration: none;
    color: #fff;
    font-size: 1.5em;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: bold;
  }

  


  /* Mobile */

  .mobile-header{
    display: none;
  }
  
  .mobile-header > nav{
    display: flex;
    flex-direction: row;
  }
  
  
  .mobile-header-image{
    text-align: right;
  }
  
  .mobile-header-image > img{
    width: 20%;
    background-color: white;
    border-radius: 1vh;
    border: solid black 2px;
    box-shadow: 0.8vh 0.8vh;
  }
  
  .logo-mobile{
    text-align: center;
    margin: auto auto;
  }

  #nav-header{
    display: none;
    width: 60%;
    margin: auto auto;
    height: 100vh;
  }

  #nav-header > li{
    text-align: center;
    margin-top: 25%;
    background-color: white;
    border: solid black 2px;
    box-shadow: 0.8vh 0.8vh;
    padding: 2vh;
  }

  #nav-header > li > a{
    color: black;
  }

  @media only screen and (max-width: 768px) {
    header {
      flex-direction: column;
      align-items: center;
      padding: 10px;
    }
    
    nav ul {
      flex-direction: column;
      align-items: center;
    }
    
    nav ul li {
      margin: 10px 0;
    }

    .mobile-header{
      display: block;
    }

    .pc-header{
      display: none;
    }
  }