style.css

.text-area {
    height: 586px;
}

.audio {
    height: 170px;
}
.example{
    height: 170px;
}
#submit-btn {
    color: #fff;
    background: #409eff;
    border-color: #409eff;
}
#submit-btn:hover{
    background: #66b1ff;
    border-color: #66b1ff;
    color: #fff;
}
#clear-btn {
    color: #fff;
    background: #e6a23c;
    border-color: #e6a23c;
}
#clear-btn:hover {
    color: #fff;
    background: #ebb563;
    border-color: #ebb563;
}