body,
html {
  margin: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
}
.screen {
  position: relative;
}
.background {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.start-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 3rem;
  font-weight: 700;

  cursor: pointer;
  background: none;

  color: #5c78a5;
  text-shadow: -2px -2px 0 #000, 2px -2px 0 #000, -2px 2px 0 #000,
    2px 2px 0 #000;

  border: none;
  border-radius: 8px;
  transition: background-color 0.2s;
}