/* Body style */
body {
  background-color:#d9d8db;
  color: black;
  font-family: Verdana;
}
/* Sidebar position */
.sidenav {
  width: 130px;
  position: fixed;
  z-index: 1;
  top: 20px;
  left: 10px;
  background: #eee;
  overflow-x: hidden;
  padding: 8px 0;
}
/* Sidebar style */
.sidenav a {
  padding: 6px 8px 6px 16px;
  text-decoration: none;
  font-size: 25px;
  color: #2196F3;
  display: block;
}
/* Sidebar hover color */
.sidenav a:hover {
  color: #064579;
}
/* Format main */
.main {
  margin-left: 140px; 
  font-size: 28px;
  padding: 0px 10px;
}
/* Dynamic sidebar size */
@media screen and (max-height: 450px) {
  .sidenav {padding-top: 15px;}
  .sidenav a {font-size: 18px;}
  
.container {
  position: relative;
}

.container > div {
  position: absolute;
}

.begin {
  animation: fade-out 5s infinite;
}

.end {
  animation: fade-in 5s infinite;
}

@keyframes fade-out {
  from {
    opacity: 1;
  }
  
  to {
    opacity: 0;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  
  to {
    opacity: 1;
  }
}
}