body {
   
  font-family: Arial, sans-serif;
  background-color: 	#40E0D0;
  color: #333;
}
header {
  background-color: #43a047; 
  color: white;
  padding: 20px;
  text-align: center;
}
nav {
  background-color: #81c784; 
  padding: 10px;
  text-align: center;
}
nav a {
  display: block;
  text-decoration: none;
  color: black;
  background-color: #00FA9A;
  border: 3px outset red;
  font-family: Arial, sans-serif;
  padding: 3px 10px; 
  margin:2px; 
}
nav a:hover {
  color: white;
  background-color: green;
}
nav a:active {
  color: white;
  background-color: gray;
  border: 2px inset gray;  
}
main {
  padding: 20px;
}
footer {
  background-color: #1976d2;
  color: white;
  text-align: center;
  padding: 10px;
  grid-column:1/8;
  grid-row:4/5
 
  bottom: 0;
  width: 100%;
}
.button {
  background-color: #4caf50;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  margin: 4px 2px;
  cursor: pointer;
  border-radius: 4px;
}
.button:hover {
  background-color: #388e3c; 
}
table, th, td {
  border: 1px solid black;
  font-family: sans-serif;
}
table {
  border-collapse: collapse;
}
th {
  background-color: #6cd4c8;
}
tr:nth-child(odd) {
  background-color: #C3C3C3;
}
td {
  width: 6%;
  text-align: center;
}
a {
  color: #1976d2; 
  text-decoration: underline;
}
a:hover {
  color: #388e3c; 
}
img {
margin: 10px;
border: 5px solid #008080;
padding: 0,5px;
}