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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Courier New', Courier, monospace;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

input {
  font-family: inherit;
  outline: none;
  border: none;
}

ul, ol {
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
}