.dropdown-submenu {
position: relative;
}
.dropdown-submenu .dropdown-menu {
top: 0;
left: 100%;
margin-top: -1px;
}.container{
    width: 1500px;
    height: 1000px;
    background-color: white;

}#mySidenav a {
    position: absolute; /* Position them relative to the browser window */
    left: -180px; /* Position them outside of the screen */
    transition: 0.3s; /* Add transition on hover */
    padding: 15px; /* 15px padding */
    width: 300px; /* Set a specific width */
    text-decoration: none; /* Remove underline */
    font-size: 20px; /* Increase font size */
    color: white; /* White text color */
    border-radius: 0 5px 5px 0; /* Rounded corners on the top right and bottom right side */
  }

  #mySidenav a:hover {
    left: 0; /* On mouse-over, make the elements appear as they should */

  }


  #about {
    top: 50px;
    background-color: #4CAF50;
  }

  #blog {
    top: 80px;
    background-color: #2196F3; /* Blue */
  }

  #projects {
    top: 140px;
    background-color: #f44336; /* Red */
  }

  #contact {
    top: 200px;
    width: 20%;
    background-color: #555 /* Light Black */
  }