.left_col{ position:relative; text-align:center; }
.tree_img{ width:100%; max-width:500px; margin:1rem 0 0; }

.right_col{ margin-top:3rem; }

.social_separator{ width:80%; height:1px; background:#aaa; margin:0 auto; }

@media only screen and (max-width:800px){
    .tree_img{ margin-top:2rem; }
    .left_col h1{ position:absolute; bottom:4rem; left:5%; }
    .right_col{ margin-top:0; } }