body {
  background-color: #303133;
  color: #fff;
  font-family: Poppins, Helvetica, sans-serif;
}

a {
  color: inherit;
}

a:hover {
  background-color: #777777;
}

h1 {
  font-family: Poppins, Verdana, courier, sans-serif;
  font-size: 2.6rem;
  margin: 0;
  text-align: center;
}

main {
  margin: auto;
  max-width: 72rem;
  padding: 1rem;
}
footer {
  font-size: 0.8rem;
  margin-top: 1rem;
  padding: 0.4rem;
}

footer a,
footer span {
  margin: 0.5rem;
}

button {
  background-color: #3a3b3d;
  color: #fff;
  font-size: 1rem;
  padding: 0.4rem 0.8rem;
}

tt {
  font-size: 1rem;
}

td img {
  vertical-align:middle;
}

main svg {
  max-height: 2rem;
}

@media (min-width: 540px) {
  main {
    padding: 2rem;
  }
}

@media (max-width: 300px) {
  header,
  footer {
    display: none;
  }
}