html {
   box-sizing: border-box;
}
*,*::before, *::after {
   box-sizing: inherit;
}

h1 {
   color:tomato;
}



* {
  box-sizing: border-box;
}
.container {
  display: inline-block;
  cursor: pointer;
}

.bar1, .bar2, .bar3 {
  width: 35px;
  height: 5px;
  background-color: #333;
  margin: 6px 0;
  transition: 0.4s;
}

/* Rotate first bar */
.change .bar1 {
  transform: translate(0, 11px) rotate(-45deg);
}

/* Fade out the second bar */
.change .bar2 {opacity: 0;}

/* Rotate last bar */
.change .bar3 {
  transform: translate(0, -11px) rotate(45deg);
}
body {
  margin: 0;
  background-color:linen;
  text-align:center;
}
/* Style the header */
.header {
  background-color: grey;
  padding: 20px;
  
}

/* Style the top navigation bar */
.topnav {
  overflow: hidden;
  background-color: lightgrey;
}

/* Style the topnav links */
.topnav a {
  
  display: block;
  color: red;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

/* Change color on hover */
.topnav a:hover {
  background-color: red;
  color: black;
}/* Style the bottom navigation bar */
.bottomnav {
  overflow: hidden;
  background-color: black;
}

/* Style the bottomnav links */
.bottomnav a {
  
  display: block;
  color: red;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

/* Change color on hover */
.bottomnav a:hover {
  background-color: red;
  color: black;
}

/* Create three equal columns that floats next to each other */
.column {
  float: left;
  width: 33.33%;
  padding: 15px;
}

/* Clear floats after the columns */
.row::after {
  content: "";
  display: table;
  clear: both;
}

/* Responsive layout - makes the three columns stack on top of each other instead of next to each other */
@media screen and (max-width:600px) {
  .column {
    width: 100%;
  }

}