* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: Arial, sans-serif;
  background: #111;
}

canvas {
  display: block;
}

#interface {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 10;
  min-width: 245px;
  padding: 15px;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.6);
  text-shadow: 1px 1px 3px black;
}

#interface h1 {
  margin: 0 0 10px;
  color: #ffd700;
  font-size: 20px;
}

#interface p {
  margin: 7px 0;
}

#mensagem {
  color: #8fffa0;
  font-size: 14px;
}

#controles {
  position: fixed;
  bottom: 20px;
  left: 50%;
  z-index: 10;
  transform: translateX(-50%);
  padding: 10px 15px;
  color: white;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.65);
}