style.css

/* #container {
    width: 1050px;
    height: 600px;
    border: 4px solid black;
    
    
    margin: 0px auto;
    text-align: center;
} */


/* The Modal (background) */
.modal {
  display: on; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1; /* Sit on top */
  padding-top: 100px; /* Location of the box */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content */
.modal-content {
  background-color: #fefefe;
  margin: auto;
  padding: 20px;
  border: 1px solid #888;
  width: 80%;
  text-align: center;
  font-size: 150%;
  font-family: Arial, Helvetica;
}

.close:hover,
.close:focus {
  color: #000;
  text-decoration: none;
  cursor: pointer;
}

  
body {
  margin: 0;
}