* {
  box-sizing: border-box;
}

/* Add a gray background color with some padding */
body {
  font-family: Arial;
  padding: 20px;
  background: #f1f1f1;
}

/* Header/Blog Title */
.header {
  padding: 30px;
  font-size: 40px;
  text-align: center;
  background: white;
}

/* Create two unequal columns that floats next to each other */
/* Left column */
.leftcolumn {   
  float: left;
  width: 100%;
}

/* Right column 
.rightcolumn {
  float: left;
  width: 25%;
  padding-left: 20px;
}*/

/* all images in the index file */
.indeximg {
  background-color: #aaa;
  width: 100%;
  padding: 20px;
}

/* center image in the article*/
.articleimg {
  background-color: #aaa;
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}

/* Add a card effect for articles */
.card {
   background-color: white;
   padding: 20px;
   margin-top: 20px;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

/* Footer */
.footer {
  padding: 20px;
  text-align: center;
  background: #ddd;
  margin-top: 20px;
}

.subtitle {
    text-align : left;
    font-size: 25px;
    font-weight: bold;
    
}

/* Responsive layout - when the screen is less than 800px wide, make the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 800px) {
  .leftcolumn, .rightcolumn {   
    width: 100%;
    padding: 0;
  }
}