Aa

.onmaibana {
margin-right:6px;
padding: 15px 15px;
font-size: 17px;
text-align: center;
cursor: pointer;
outline: none;
color: #fff;
background-color: #009688;
border: none;
border-radius: 10px;
box-shadow: 0 9px #000;
}
/* Darker background on mouse-over */
.onmaibana:hover {
background-color: #a5a6a7;
}
.onmaibana:active {
background-color: #3e8e41;
box-shadow: 0