:root {
  --orange: #ff9900;
  --blue: #0052a4;
  --white: #ffffff;
  --black: #000000;
  --light-gray: #f5f5f5;
  --red: #ff4136;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  background-color: var(--light-gray);
  color: var(--black);
  margin: 0;
  padding: 20px;
  line-height: 1.5;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}