header {
    color: lime;
    background: green;
    height: 80px;
    width: 44%;
    border: 2px solid white;
    border-radius: 7px;
}

h2 {
    margin-top: 20px;
    margin-left: 5%;
}

button {
    margin: 20px 0 15px 5px;
    height: 30px;
    width: 180px;
    border-radius: 8px;
    color: black;
    background-color: #E6F5E9;
}

button:hover {
    color: white;
    background-color: green;
}

.mainDiv {
    height: 100%; 
    width 80%; 
    top: 0; 
    border: 2px solid green; 
    padding-left: 30%;
}    

.btnDiv {padding-left: 5px; }

.imgDiv {padding-left: 15px; }