* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  padding: 0;
}

html {
  background: #111;
}

body {
  overflow: hidden;
  background: #111;

  font-family:
    Arial,
    Helvetica,
    sans-serif;

  overscroll-behavior: none;

  -webkit-user-select: none;
  user-select: none;

  -webkit-tap-highlight-color: transparent;
}

.game-shell {
  width: 100vw;
  height: 100vh;
  height: 100dvh;

  display: flex;
  align-items: center;
  justify-content: center;

  overflow: hidden;
}

#game {
  display: block;
  flex: 0 0 auto;

  background: #87ceeb;

  touch-action: none;
}

@media (min-width: 640px) {
  #game {
    border-radius: 18px;

    box-shadow:
      0 18px 60px
      rgba(0, 0, 0, 0.4);
  }
}

@media (max-width: 639px) {
  body {
    background: #87ceeb;
  }

  #game {
    border-radius: 0;
    box-shadow: none;
  }
}