* {
    box-sizing: border-box;
  }
  
  body {
    font-family: Arial, Helvetica, sans-serif;
  }
  
  /* Style the header */
  header {
    background-color: #555555;
    padding: 20px;
    text-align: center;
    font-size: 35px;
    color: white;
  }
  
    
  article1 {
    float: left;
    padding: 20px;
    width: 30%;
    background-color: #f1f1f1;
    height: 600px; /* only for demonstration, should be removed */
  }
  
  article2 {
    float: left;
    padding: 20px;
    width: 70%;
    background-color: #f1f1f1;
    height: 600px; /* only for demonstration, should be removed */
  }



  /* Clear floats after the columns */
  section::after {
    content: "";
    display: table;
    clear: both;
  }
  
  /* Style the footer */
  footer {
    background-color: #777;
    padding: 10px;
    text-align: center;
    color: white;
  }
 .heading1 {color: rgba(38, 10, 220, 0.608);
text-align: center;
background-color: rgb(154, 160, 158);
  size: 33;
}

.heading2 {color: rgb(132, 0, 255);
  text-align: center;
  background-color: aquamarine;
    size: 22;  
}
aside {
    width: 40%;
    padding-left: 15px;
    margin-left: 15px;
    float:left;
    font-style: italic;
    background-color: lightgray;
  }
 
  

  .flex-container {
    display: flex;
    background-color: rgb(157, 163, 169);
  }
  
  .flex-container > div {
    background-color: #bdc1c9;
    margin: 20px;
    padding: 3px;
    font-size: 15px;
    color: #2306a8;
  }