body, button {
    font-family: Arial, 'Segoe UI VSS (Regular)','Segoe UI',"Trebuchet MS";
    font-size: 18px;
}

.section {
    margin: 16px;
}

button {
    color: #fff;
    border: none;
    padding: 10px 40px;
    background-color: darkblue;
    border-radius: 4px;
    /*height: 40px;*/
    transition: all linear 0.2s;
}

    button:hover {
        background-color: rgb(100,40,230);
    }

    button[disabled] {
        background-color: silver;
    }