.bar {
    text-align: left;
    background-color: violet;
  	margin: 0 auto;
}

.button1 {
    background-color: chartreuse;
    transition: background-color 0.4s;
    padding: 12px 16px
}

.button1:hover {
    background-color: green;
}

.button2 {
    background-color: brown;
    transition: background-color 0.4s;
    padding: 12px 16px;
}

.button2:hover {
    background-color: darkred;
}