body {
  background-color: #00FFF7;
}
 th, td {
  border: 3px solid black;
  text-align: center;       
  vertical-align: middle;
}






table {
  width: 100%;
}
th{
    height: 50px;
    border-radius: 35%;
    background-color: #12abc9;
}

td {
   width: 350px;
  height: 100px;
  border: 3px solid red;
   border-radius: 100%;   
   background-color: #12c98f;
}
td:hover{
     background-color:#1E2BE6;
     color:white;
}
button {
  margin: 10px;
  padding: 8px 15px;
  background-color: #444;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  text-align: left;
}

button:hover {
  background-color: #666;
}