html {
  box-sizing: border-box;
  background-color: #ffffff;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

body {
  margin: 0;
  font-family: "Open Sans";
}

h1,
h2,
h3 {
  font-family: "Open Sans";
}

button {
  cursor: pointer;
}