body{
  font-family: Helvetica, Arial, sans-serif;
  background-color: rgb(0, 0, 0);
}

selected{
  text-decoration: none;
  color: red;
}

#a {
  text-decoration: none;
  color: red;
}

#h1, #h2, #h3{
  margin: 0;
}

#container{
  background-color: rgb(255, 255, 255);
  width: 1200px;
  margin-left: auto;
  margin-right: auto;

}

#content{
  background-color: rgb(255, 255, 255);
  width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

#header{
  background-color: #C0C0C0;
  color: white;
  text-align: center;
  padding: 20px;
}

#body .content .sidebar{
  color: blue;
  padding: 20px;
}

#main{
  background-color: #808080;
  width: 1200px;
  padding-top: 10px;

}

#footer{
  clear: both;
  padding: 20px;
  background-color: #999999;
  color: #ffffff;
  text-align: right;
}
/* Navbar container */
.navbar {
  overflow: hidden;
  background-color: #333;
  font-family: Arial;
}

/* Links inside the navbar */
.navbar a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

/* The dropdown container */
.dropdown {
  float: left;
  overflow: hidden;
}

/* Dropdown button */
.dropdown .dropbtn {
  font-size: 16px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit; /* Important for vertical align on mobile phones */
  margin: 0; /* Important for vertical align on mobile phones */
}

/* Add a red background color to navbar links on hover */
.navbar a:hover, .dropdown:hover .dropbtn {
  background-color: red;
}

/* Dropdown content (hidden by default) */
.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;
}

/* Links inside the dropdown */
.dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

/* Add a grey background color to dropdown links on hover */
.dropdown-content a:hover {
  background-color: #ddd;
}

/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content {
  display: block;
}
#aaa{
  padding: 20px;
}