* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
   background-color: #464138;
}

#toplink {
	background: white;
	bottom: 0;
	margin: 0;
	padding: 2em 1em;
	position: fixed;
	right: 0;
}   




.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: #4CAF50;
  color: white;
}

.topnav .icon {
  display: none;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}
/* Style the header */
.header {
  background-color: #464138;
  padding: 30px;
  text-align: center;
  font-size: 35px;
}

/* Container for flexboxes */
.row {
  display: -webkit-flex;
  display: flex;
}

/* Create three unequal columns that sits next to each other */
.column {
  padding: 10px;
  /* height: 300px;  Should be removed. Only for demonstration */
}

/* Left and right column */
.column.side {
   -webkit-flex: 1;
   -ms-flex: 1;
   flex: 1;
}

/* Middle column */
.column.middle {
  -webkit-flex: 3;
  -ms-flex: 3;
  flex: 3;
}

/* Style the footer */
.footer {
  background-color: #f1f1f1;
  padding: 10px;
  text-align: center;
}

/* Responsive layout - makes the three columns stack on top of each other instead of next to each other */
@media (max-width: 600px) {
  .row {
    -webkit-flex-direction: column;
    flex-direction: column;
  }
}
#myBtn {
  display: none;
  position: fixed;
  bottom: 20px;
  left: 30px;
  z-index: 99;
  font-size: 18px;
  border: none;
  outline: none;
  background-color: red;
  color: white;