@import url('https://fonts.googleapis.com/css?family=Russo+One&display=swap');

body {
  color: #262626;
  background-color: rgb(230, 230, 230);
  font-family: roboto, sans-serif;
  font-size: 16pt;
  max-width: 800px;
  margin: auto;
  padding: 20px;
}

a {
  color: inherit;
  font-weight: bold;
  text-decoration: none;
}

img {
  width: auto;
  transform: scale(0.6);
  max-width:100%;
  height: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

h1 {
  font-family: 'Russo one';
  border-bottom: 3px solid #262626;
}

h2 {
  margin-top: 0;
  font-family: 'Russo one';
  border-bottom: 2px solid #262626;
}

h3 {
  text-align: center;
  font-family: 'Russo one';
  font-size: 72;
}

.mathsbox {
  background-color: rgb(217,217,217);
  border: 3px solid #262626;
  padding: 10px;
}