User:Yahya/styles.css

.main-box {
    position: relative;
    margin: 1.2rem auto;
    padding: 1rem 2rem;
    max-width: 46.5rem;
    color: #fff;
	font-family: serif;
    font-size: 1.3rem;
    text-align: justify;
    background-color: rgba(45, 59, 146, 0.65);
    box-shadow: 0 2px 5px #c5c5c5;
}

.contact {
   text-align: left
   }

.main-box::before {
    content: "";
    z-index: -1;
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background-image: url(https://upload.wikimedia.org/wikipedia/commons/2/2b/Watts-Strogatz_small-world_model_100nodes.png);
    background-size: cover;
    background-repeat: no-repeat;
}

.main-box *::selection {
    background: rgba(236,236,236,0.35);
}

/* unvisited link */
.main-box a:link {
  color: red;
}

/* visited link */
.main-box a:visited {
  color: green;
}

/* mouse over link */
.main-box a:hover {
  color: hotpink;
}

/* selected link */
.main-box a:active {
  color: blue;
}