body {
    margin: 0;
  }

  .logo-img {
    height: 90px;
  }

  .topnav {
    position: relative;
    overflow: hidden;
    background-color: #2bb673;
    box-shadow: 0 5px 5px -1px rgba(0,0,0,0.25);
    border-bottom: 2px solid #ceb198;
  }
  
  .topnav a {
    font-family: 'Open Sans', sans-serif;
    font-weight: 700;
    font-size: 14px;
    color: #444;
    text-transform: uppercase;

    float: left;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
  }
  
  .topnav .logo a:hover {
    background-color: rgba(221, 221, 221, 0);
  }

  .topnav a:hover {
    background-color: #ddd;
    color: black;
  }
  
  .topnav a.active {
    background-color: #4CAF50;
    color: white;
  }


  
  .home {
    float: none;
    position: absolute;
    top: 50%;
    left: 30%;
    transform: translate(-50%, -50%);
  }

  .about {
    float: none;
    position: absolute;
    top: 50%;
    left: 40%;
    transform: translate(-50%, -50%);
  }

  .service {
    float: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

  .contact {
    float: none;
    position: absolute;
    top: 50%;
    left: 60%;
    transform: translate(-50%, -50%);
  }

  
  .topnav-right {
    float: right;
  }
  
  /* Responsive navigation menu (for mobile devices) */
  @media screen and (max-width: 600px) {
    .topnav a, .topnav-right {
      float: none;
      display: block;
    }
    
    .topnav-centered a {
      position: relative;
      top: 0;
      left: 0;
      transform: none;
    }
  }
  
  .topnav .toggle-icon {
    display: none !important;
  }

  .topnav.responsive a.currentPage {
    visibility: hidden;
  }
  
  @media screen and (min-width: 601px) {
    a.active-menu.currentPage {
      visibility: hidden;
    }
  }

  @media screen and (max-width: 600px) {
    .topnav a:not(:first-child) {display: none !important;}
    .topnav a.toggle-icon {
      float: right !important;
      display: block !important;
    }

    .home {
      left: 50%;
      position: relative;
    }
  
    .about {
      left: 50%;
      position: relative;
    }
  
    .service {
      left: 50%;
      position: relative;
    }
  
    .contact {
      left: 50%;
      position: relative;
    } 
  }
  
  @media screen and (max-width: 600px) {
    .topnav.responsive {position: relative !important;}
    .topnav.responsive .toggle-icon {
      position: absolute !important;
      right: 0 !important;
      top: 0 !important;
    }
    .topnav.responsive a {
      float: none !important;
      display: block !important;
      text-align: left !important;
    }
  }

  @media screen and (min-width: 601px) and (max-width: 768px) {
    .home {
      left: 30%;
    }
  
    .about {
      left: 45%;
    }
  
    .service {
      left: 60%;
    }
  
    .contact {
      left: 75%;
    } 
  }