body{
    background-color: black;
}

a:link {
    color: white;
    background-color: black;
    text-decoration: none;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  }
  
  a:visited {
    color: white;
    background-color: black;
    text-decoration: none;
  }
  
  a:hover {
    color: white;
    background-color: black;
    text-decoration: underline;
  }
  
  a:active {
    color: white;
    background-color: black;
    text-decoration: underline;
  }
  
  .header_footer{
      display: block;
      margin-left: auto;
      margin-right: auto;
  }
  main{
      width: 800px;
      margin-left: auto;
      margin-right: auto;
  }
  
  .navbar ul{
      list-style-type: none;
      background-color: hsl(0, 0%, 0%);
      padding: 0px;
      margin: 0px;
      overflow: hidden;
  }
  .navbar a{
      color: white;
      text-decoration: none;
      padding: 15px;
      display: block;
      text-align: center;
      margin-left: 200px;
      margin-right: auto;
  }
  .navbar a:hover{
      background-color: hsl(0, 0%, 10%);
  }
  .navbar li{
      float: left;
}
iframe {
    display: block;
    margin: 0 auto;
 }

.some{
    display: inline-block; 
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    
}
.apple{
    margin-right: 50px
    
}