body {
background-color: black;
}

.header {
color: white;
}

.head1 {
  font-size: 40px;
}

.head2 {
  font-size: 17px;
}

.menu {
  color: white;
  background-color: green;
  position: sticky;
  padding: 10px 0px 10px 0px;
  margin: 0 auto;
  overflow: hidden;
}

.menu a:hover {
  cursor: pointer;
  opacity: 0.5;
}

.menu a {
  float: left;
  text-align: center;
  padding: 14px 16px;
  font-size: 20px;
  transition: 0.15s;
}

.menu-log {
  right: auto;
  float: right;
}

.sidenav {
  height: 100%;
  width: 160px;
  position: fixed;
  background-color: gray;
  color: white;
  overflow-x: hidden;
  padding-top: 20px;
}

.sidenav a {
  display: block;
  padding: 2px;
  transition: 0.15s;
}

.sidenav a:hover {
  opacity: 0.5;
  cursor: pointer;
}

.main {
  margin-left: 160px;
  padding: 0px 10px;
  color: white;
}

@media screen and (max-height: 450px) {
  .sidenav {padding-top: 15px;}
  .sidenav {font-size: 18;}
}