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

html {
  height: 100vh;
  width: 100vw;
  min-height:600px;
  min-width: 600px;
  background-color: black;
  display: flex;
  justify-content: center;
  align-items: center;
}

html::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.4;
}