.pinlogin .pinlogin-field {
    box-sizing: border-box;
    display: inline-block;
    font-size: 18px;
    width: 30px;
    height: 30px;
    border-radius: 4px !important;
    margin-top: 6px !important;
    padding: 5px;
    margin: 0 10px;
    border: 1px solid #ccc;
    text-align: center;
}

.pinlogin .pinlogin-field:first-of-type {
    margin-left: 0;
}

.pinlogin .pinlogin-field:last-of-type {
    margin-right: 0;
}

.pinlogin .pinlogin-field:read-only
{
	border:1px solid #ddd;
	background:#fafafa;
	cursor:default;
}

.pinlogin .pinlogin-field.invalid
{
	border:1px solid red;
	color:red;
}