Styling the buttons on the edit entry page (as seen on the GravityView blog)

edit-entry-button styles.css

/* Update button */
#publishing-action .gv-button-update {
	background-color: #4CAF50;
  	border: 2px solid #4CAF50;
  	color: #ffffff;
  	padding: 15px 32px;
  	text-align: center;
  	font-size: 16px;
}

#publishing-action .gv-button-update:hover {
	background-color: #46a04a;
	border: 2px solid #46a04a;
	cursor: pointer;
}

/* Cancel button */
#publishing-action .gv-button-cancel {
background-color: #fff;
  	border: 1px solid #000;
  	color: #000000;
  	padding: 15px 32px;
  	text-align: center;
  	text-decoration: none;
  	font-size: 16px;
}

#publishing-action .gv-button-cancel:hover {
	background-color: #f3f3f3;
}

/* Delete button */
#publishing-action .gv-button-delete {
background-color: #F44336;
  	border: 1px solid #F44336;
  	color: #ffffff;
  	padding: 15px 32px;
  	text-align: center;
  	text-decoration: none;
  	font-size: 16px;
}

#publishing-action .gv-button-delete:hover {
	background-color: #f21c0d;
	border: 1px solid #F44336;
}