style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    font-family: Railway, Helvetica Neue, Arial;
    font-size: 18px;
    background: url("test.png") no-repeat center center fixed;
    
      
}

h1, h2{
    font-family: Helvetica Neue, Arial;
    color: black;
}


h1{
    font-size: 90px;
    margin-bottom: 20px;
    
}

h2{ 
    font-size: 32px;
    margin-bottom: 10px;
    
}
p {
    text-align: justify;
    background-color:
    
}

.header { \\this is the header(title)
  padding: 50px;
  text-align: left;
  color: white;
  font-size: 30px;
  margin-top: 30px;
  margin-bottom:  30px;
}

.topnav {   
    background-color: gray;
    overflow: hidden;
}

.topnav a {
    float: left;
    color:#f2f2f2;
    text-align: center;
    padding:14px 16px;
    text-decoration: none;
    font-size: 17px;
}

.topnav a:hover {
    background-color: #ddd;
    color: black;
}

.topnav a.active {
  background-color: black;
  color: white;
}

html { 
  //background: url(testbk.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.main-text {
    text-align: justify;
    margin-bottom: 25px;
    font-size: 20px;
    line-height: 150%;
    max-width: 90ch;
    margin-top: 25px;
    
 }

.author-text {
    font-size: 22px;
    float: left;
    margin-top: 40px;
    margin-left: 15px;
    
}
.container {
    width: 1140px;
    margin: 20px auto 0 auto;
}



.other-post {
    width: 25%;
    float: left;
}

.blogpost {
    width: 75%;
    float: left;
    padding-right: 30px;
    color: ;
    position: relative;
}

.blogpostpicture {
    float:right;
    margin-left: 50px;
    margin-top: 90px;
    text-align: right;
}

.authorbox {
    padding: 20px;
    border-top: 1px solid gray;
}


.clearfix:after {
    content: "";
    display: table;
    clear:both;
}

.other-content {
    margin-bottom: 40px;
    color: 
}

.authorbox img{
    height: 100px;
    width: 100px;
    border-radius: 50%;
    float: left;
}

.blogpost img{
    height: 400px;
    width: auto;
    
}

.date{
    position: absolute;
    top: 10px;
    right: 30px;
    
}

#overlay {
  position: fixed; /* Sit on top of the page content */
  display: block; /* Hidden by default */
  width: 100%; /* Full width (cover the whole page) */
  height: 100%; /* Full height (cover the whole page) */
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.12); /* Black background with opacity */
  z-index: 2; /* Specify a stack order in case you're using a different order for other elements */
  
}