:root {
  --black:  #000000;
  --white:  #FFFFFF;
  --gray:   #EDEDED;
  --green:  #00AE00;
  --red:    #FF4350;
  --yellow: #EBD700;
  --blue:   #4BB0FF;
}

html {
  font-family: palatino, serif;
  font-size: 133%;
  background-color: var(--gray);
}

h1, h2, h3, h4 {
  font-family: gill sans, sans-serif;
}

button {
  font-size: 100%;
  cursor: pointer;
}