body {
    background:rgb(201, 236, 242);
}
#mainDiv {
    position:absolute;
    width:60%;
    left:20%;
    height:auto;
    padding:10px 0;
    background:rgb(239, 244, 244);
}
.highlite {
    animation: highlite 2s;
    
}
.comment {
    position:relative;
    width:100%;
    box-sizing:padding-box;
    margin-top:10px;
    padding:5px 10px;
    height:auto;
    border-top:1px solid black;
    background:rgb(230, 230, 230);
}

.comment p {
    position:relative;
}
.comment h2, .title {   	
}

.comment textarea {
    width:100%;
    box-sizing:border-box;
    height:250px;
    border:none;
}
.comment button {
    position:relative;
    float: right;
    border:none;
    font-size:20px;
    padding:5px;
}
.comment button:hover {
    cursor:pointer;
    background:green;
    color:white;
}
input {
    border:none;
    left:5px;
}
@keyframes highlite {
    60% { background: yellow;}}