.header {
  background-color: #000;
  padding: 15px;
  text-align: center;
  color:white;
  font-family:Arial, Helvetica, sans-serif;
}

#logo img {
  padding-top: 7px;
  padding-left: 12px;
  padding-right: 10px;
  float: left;
}

#navbar {
  background-color: rgba(0, 0, 0, 0.5);
  font-family: Arial, Helvetica, sans-serif;
}

#navbar a {
  display: inline-block;
  font-size: 18px;
  color: white;
  text-align: center;
  padding: 20px;
  text-decoration: none;
}

#dropdown {
  display: inline-block;
}

#dropdown .dropbtn {
  font-size: 18px;  
  border: none;
  outline: none;
  color: white;
  padding: 20px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

#navbar a.active {
  background-color: red;
}

#navbar a:hover, #dropdown:hover .dropbtn {
  opacity: 0.8;
  color: red;
}

#navbar a.active:hover {
  opacity: 0.8;
  color: white;
}

#dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

#dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

#dropdown-content a:hover {
  background-color: #ddd;
}

#dropdown:hover #dropdown-content {
  display: block;
}

#user {
  float: right;
}

.content {
  padding: 16px;
}

.sticky {
  margin: 0;
  position: fixed;
  top: 0;
  width: 99%;
}

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