* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: #0b1026;
  overflow: hidden;
  font-family: "Segoe UI", system-ui, sans-serif;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
}

#jeu {
  display: block;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  border-radius: 8px;
  box-shadow: 0 0 50px rgba(0, 0, 0, .6);
}