styles.css

html {
    font-size: 10px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
    font-size: 1.6rem;
    line-height: 1;
    text-align: center;
    color: #333;
    margin: 0;
}

a {
    color: #477ca7;
  }
  
  a:visited {
    color: #74638f;
  }

h1{
    font-size: 4rem;
    margin-bottom: 0;
}

#main {
    margin: 30px 8px;
    padding: 15px;
    border-radius: 5px;
    /* background: #eee; */
   
} 

@media (max-width: 460px) {
    #main {
      margin: 0;
    }
  }
  @media (max-width: 460px) {
    #img-caption {
      font-size: 1.4rem;
    }
  }
  

#img-div {
    background: white;
    padding: 50px;
    margin: 0;
    
}

img {
    
    max-width: 100%;
    height: auto;
    display: block;
    height: auto;
    margin: 0 auto;

}

#img-caption {
    margin: 15px 0 5px 0;
    text-align: right;
    font-size: 12px;
}