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

.topnav {
overflow: hidden;
background-color: #253240;
}

.topnav a {
float: left;
display: block;
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: lightseagreen;
color: white;
}

.topnav .icon {
display: none;
}

@media screen and (max-width: 600px) {
.topnav a:not(:first-child) {display: none;}
.topnav a.icon {
float: right;
display: block;
}
}

@media screen and (max-width: 600px) {
.topnav.responsive {position: relative;}
.topnav.responsive .icon {
position: absolute;
right: 0;
top: 0;
}
.topnav.responsive a {
float: none;
display: block;
text-align: left;
}
}

.sidenav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

.sidenav li {
  padding: 8px;
  margin-bottom: 7px;
  background-color: #f2f2f2;
  color: black;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}

.sidenav li:hover {
  background-color: lightseagreen;
  color: #ffffff;
  text-decoration: none;
}
.sidenav a:hover {
  background-color: lightseagreen;
  color: #ffffff;
  text-decoration: none;
}
.sidenav a{
  color: black;
  text-decoration: none;
}

.footer {
  position: fixed;
bottom: 0;
text-align: center;
color: white;
background: black;
}