.gradient {
    /*background-color: whitesmoke;*/
    background: linear-gradient(top, lightcyan, white);
}

/* TODO: duplicate element definition leads to style problems */
.navigationBar ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    border: 1px solid #e7e7e7;
    /*background-color: #f3f3f3;*/
}

.navigationBar li {
    float: left;
    width: 10%;
}

.navigationBar li a {
    display: block;
    color: #666;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 18px;
}

.navigationBar li a:hover:not(.active) {
    background-color: #ddd;
}

.active {
    background-color: #4CAF50 !important;
    color: black !important;
}

h1, h2, h3, h4 {
    color: #333;
    font-family: Bookman;
}

body {
  font-family: Bookman;
  color: #222;
}

#topScrollButton {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 99;
  border: none;
  outline: none;
  background-color: #4CAF55;
  color: white;
  cursor: pointer;
  padding: 15px;
  border-radius: 10px;

}

#topScrollButton:hover {
  background-color: #555;
}

.twitter{
  position: absolute;
  top: 400px;
  right: 15px;
}