.button {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    width: 150px;
}
button:disabled  {
    border: 1px solid #999999;
    background-color: #cccccc;
    color: #666666;
}