* {
    box-sizing: border-box; 
   }
   body {
     margin: 0;
   }
   #main {
     display: flex;
     min-height: calc(100vh - 40vh);
   }
   #main > header{
    font-size: 50px;
   }
   #main > article {
     font-size: 1.5rem;
     flex: 1;
   }
   
   #main > aside {
     flex: 0 0 20vw;
     font-size: 2rem;
     background: rgb(137, 138, 138); 
     box-shadow: 2px;
   }
   #main > nav {
     font-size: 2em;
     order: -1;
     flex: 0 0 10vw;
     background:rgb(137, 138, 138);
     box-shadow: 4px;
   }
   
   
   header, footer, article, nav, aside {
     padding: 1em;
   }
   header {
     font-size: 30px;
     color: white;
     background: rgb(11, 11, 11);
     height: 10vh;
   }
   footer {
    color: white;
    background: rgb(11, 11, 11);
    height: 15vh;

   }
   .footer1 {
    color:azure;
   }
   *, *::after, *::before {
    box-sizing: border-box;
  }
  
  .modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    transition: 200ms ease-in-out;
    border: 1px solid black;
    border-radius: 10px;
    z-index: 10;
    background-color: white;
    width: 750px;
    max-width: 80%;
  }
  
  .modal.active {
    transform: translate(-50%, -50%) scale(75%);
  }
  
  .modal-header {
    padding: 10px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid black;
  }
  
  .modal-header .title {
    font-size: 1.25rem;
    font-weight: bold;
  }
  
  .modal-header .close-button {
    cursor: pointer;
    border: none;
    outline: none;
    background: none;
    font-size: 1.25rem;
    font-weight: bold;
  }
  
  .modal-body {
    padding: 10px 15px;
  }
  
  #overlay {
    position: fixed;
    opacity: 0;
    transition: 200ms ease-in-out;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, .5);
    pointer-events: none;
  }
  
  #overlay.active {
    opacity: 1;
    pointer-events: all;
  }
  #main.navbut {
    padding: 10%;
    border-radius: 10%;
    cursor: pointer;
  }