body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav a {
  
  color: white;
  text-align: center;
  padding: 18px 10px;
  text-decoration: none;
  font-size: 17px;
}
.topnav {
    background-color: #EBBB00;
    overflow: hidden;
}
/* Change the color of links on hover */
.topnav a:hover {
    background-color: #ddd;
    color: black;
}

/* Add a color to the active/current link */
.topnav a.active {
    background-color: #4CAF50;
    color: white;
}

.container_left2 {
float:left;
  background-color:white;
  color: black;
  margin-left: 00px;
   margin-right: 20px;
    margin-top: 10px;
  padding: 5px;
width:1000px;
}

.container_train {
  background-color:white;
  color: black;
  margin-left: 0px;
   margin-right: 0px;
    margin-top: 10px;
  padding: 5px;
width:auto;
}