*{ box-sizing: border-box; }

nav{
  width: 100%;
  display: inline-block;
  margin-bottom: 5vmin;
  text-align: center;
} 
nav a{
 display: inline-block;
  text-align: center;

}

#canvas {
    background-color: #e59f03;
        width: 60vmin; 
        height: 62vmin;
        margin: 12vmin auto 0 auto;
    position: relative;
}

#secondring { 
  position: absolute;
  left: 11vmin;
  top: 15vmin;
  width: 40vmin;
  height: 45vmin;
  background-color: #d56510; 

}

#thirdring {
  position: absolute;
  left: 16vmin;
  top: 24vmin;
  width: 30vmin;
  height: 32vmin;
  background-color: #af4207
}

#fourthring {
  position: absolute;
  left: 23vmin;
  top: 34vmin;
  width: 15vmin;
  height: 16vmin;
  background-color: #b51e13
}
body {
  background-color: white;
  font-family: "Open Sans", sans-serif;
  padding: 5px 25px;
  font-size: 18px;
  margin: 0;
  color: #444;
}

h1 {
  font-family: "Merriweather", serif;
  font-size: 22px;
  text-align: center;
}