html, body {
  background-color: #2c3e50;
  margin: 0;
  height: 100%;
  font-family: 'Quicksand', sans-serif;
}

main {
  position: absolute;
  width: 100%;
  height: auto;
}

.wrapper {
  position: relative;
  border-top: 40px solid #34495e;
  border-left: 40px solid #34495e;
  border-right: 40px solid #34495e;
  height: 95vh;
}

.topheader {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  color: #fff;
  width: 300px;
  padding: 10px;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
  background-color: #34495e;
  text-transform: uppercase;
  font-size: 24px;
  letter-spacing: 6px;
  font-family: 'Hind Siliguri', sans-serif;
}

.container {
  width: 1000px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  color: #fff;
}

ul {
  list-style-type: none;
}

ul > a {
  text-decoration: none;
  color: #fff;
}

ul > a > li {
  background-color: #3498db;
  padding: 20px;
  margin-bottom: 10px;
  font-size: 24px;
  letter-spacing: 3px;
}

ul > a > li:hover {
  cursor: pointer;
  background-color: #2387db;
}

.container header {
  background-color: #1f2d3b;
  padding: 10px;
  text-align: left;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 23px;
}

.container article {
  background-color: #34495e;
  padding: 20px;
  font-size: 20px;
  text-align: left;
}

.btn {
  width: 300px;
  text-align: center;
  margin: 10px;
  padding: 10px;
  border: none;
  font-size: 24px;
  border-radius: 10px;
  color: #fff;
}

.btn-info {
  background-color: #3498db;
}

.btn-info:hover {
  background-color: #2387db;
  cursor: pointer;
}

#canvas {
  margin-top: 30px;
}