body {
    background-color: #F1F791;
    width: 800px;
    margin: 0 auto;
    font-family: 'Monda', sans-serif;
}
header {
    background: #DEE75A;
    padding: 10px;
    text-align: center;
}
h1 {
    color: #313409;
    top: -10px;
}
h2 {
    color: #5B5F21;
}
nav {
    /*background: #212306;*/
    /*text-align: center;*/
    /*padding: 5px;*/
    overflow: hidden;
    background-color: #333;
}
nav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
}
nav a.active {
    background-color: green;
    color: white;
}
nav a:hover {
    background-color: yellowgreen;
    color: black;
}
main {
    background: yellow;
    padding: 10px;
    text-align: center;
}
class {
    color: aqua;
}
class .a {
    color: antiquewhite;
    
}


.topnav {
  overflow: hidden;
  background-color: #333;
}

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

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

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