body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
  overflow: hidden;
  background-color: rgb(26, 121, 75);
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  font-size: 17px;
}

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

.topnav a.active {
  background-color: #0446aa;
  color: white;
} 

p {
  color: black;
}

details > summary {
  padding: 4px;
  width: 200px;
  background-color: rgb(21, 129, 113) ;
  border: none;
  box-shadow: none;
  cursor: pointer;
  
}