.centered { text-align: center; }

.submit_button {
  background-color: #5db36f;
  border: 1px solid #396e44;
  color: #FFF; 
  margin: 0.2em auto 0.75em auto;
  text-align: center;
  padding: 0.4em 0.5em;
  cursor: pointer;
}
.submit_button:hover { background-color: #61c276; }
.submit_button:active { background-color: #4d9c5e; color: #CCC; }