nav.primary-navigation {
    margin: 0 auto;
    display: block;
    padding: 120px 0 0 0;
    text-align: center;
    font-size: 16px;
  }
  nav.primary-navigation ul li {
    list-style: none;
    margin: 0 auto;
    border-left: 2px solid #3ca0e7;
    border-right: 2px solid #3ca0e7;
    display: inline-block;
    padding: 0 30px;
    position: relative;
    text-decoration: none;
    text-align: center;
    font-family: arvo;
  }
  nav.primary-navigation li a {
    color: black;
  }
  nav.primary-navigation li a:hover {
    color: #3ca0e7;
  }
  nav.primary-navigation li:hover {
    cursor: pointer;
  }
  nav.primary-navigation ul li ul {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    padding-left: 0;
    left: 0;
    display: none;
    background: white;
  }
  nav.primary-navigation ul li:hover > ul, nav.primary-navigation ul li ul:hover {
    visibility: visible;
    opacity: 1;
    display: block;
    min-width: 250px;
    text-align: left;
    padding-top: 20px;
    box-shadow: 0px 3px 5px -1px #ccc;
  }
  nav.primary-navigation ul li ul li {
    clear: both;
    width: 100%;
    text-align: left;
    margin-bottom: 20px;
    border-style: none;
  }
  nav.primary-navigation ul li ul li a:hover {
    padding-left: 10px;
    border-left: 2px solid #3ca0e7;
    transition: all 0.3s ease;
  }



a {
    text-decoration: none;
    color: navy;
}
a:hover {
    color: #3ca0e7;
}
a:visited {
    color: pink;
}
ul li ul li a {
    transition: all 0.5s ease;
}
h1 {
    color: rgb(67, 67, 67);
    font-family: Tahoma, Geneva, Verdana, sans-serif;
}  
h2 {
    color: gray;
    font-family: Tahoma, Geneva, Verdana, sans-serif;
}
img {
    max-width:100%;
    height:auto;
}


table.big-table ul,ol,dl,p,th {
    font-size: 1.0rem;
    font-family: Tahoma, Geneva, Verdana, sans-serif;
    color: rgb(67, 67, 67);
    text-align: left;
  }
table.big-table td {
    font-family: Tahoma, Geneva, Verdana, sans-serif;
    padding-left: 10px;
}


table.dataframe ul,ol,dl,p,th {
    font-size: 1.0rem;
    font-family: Tahoma, Geneva, Verdana, sans-serif;
    color: rgb(67, 67, 67);
    text-align: left;
  }
table.dataframe td {
    font-family: Tahoma, Geneva, Verdana, sans-serif;
    padding-left: 10px;
}
