tr:nth-child(even) {background: #CCC}
tr:nth-child(odd) {background: #eee}
td {text-align: center;}
li {
 	text-align: center;
	display: block;
	background: #ddd;
	padding-top: 10px;
  border-radius: 15px;	
}
.unpaid a {
 	text-decoration:none;
 	display: block;
 	background: #fbb;
 	color: #622;
 	padding: 8px;
  border-radius: 15px;
 }
.paid a {
 	text-decoration:none;
 	display: block;
 	background: #bfb;
 	color: #262;
 	padding: 8px;
  border-radius: 15px;
}
body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: #ccf; 
}
header {
	text-align: center;
}

.navbar {
  overflow: hidden;
  background-color: #333;
}

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

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 16px;  
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.navbar a:hover, .dropdown:hover .dropbtn {
  background-color: red;
}

.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;
}