* { margin: 0; padding: 0;}
body { background-color: #b3b3b3;}

.dowebok { position: absolute; left: 50%; top: 50%; margin: -300px 0 0 -340px; text-align: center;}
.dowebok p { font-size: 18px; color: #3c4349;}
.dowebok img { display: block; margin: 50px auto;}