body {
  background-color: #feffff;
  font-family: "Trebuchet MS", Helvetica, sans-serif;
}
.tab { 
 margin-left: 5px; 
}

h1 {
  color: blue;
}
h2 {
  color: blue;
}
h3 {
  color: blue;
}
p {
  color: black;
}

.header {
  background-color: #f1f1f1;
  padding: 2px;
  text-align: center;
}

#navbar {
  overflow: hidden;
  background-color: #333;
}

#navbar a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

#navbar a:hover {
  background-color: #ddd;
  color: black;
}

#navbar a.active {
  background-color: #00008b;
  color: white;
}

.content {
  padding: 16px;
}

.sticky {
  position: fixed;
  top: 0;
  width: 100%;
}

.sticky + .content {
  padding-top: 60px;
}