html,
body {
  width: 100%;
  height: 100%;
}
*,
*::after,
*::before {
  box-sizing: border-box;
}
header a {
  text-decoration: none;
  color: black;
  display: inline-block;
}

svg,
img,
iframe {
  display: block;
}
input {
  padding: 0;
}