* { box-sizing: border-box; }
body, html {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: linear-gradient(#071428, #0f2330 60%);
  height: 100%;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  color: #fff;
}

.game-container {
  position: relative;
  width: 100%;
  height: 100%;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: transparent;
}

video { display: none; }

#hud {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(0,0,0,0.45);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.4;
  min-width: 140px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.5);
}

#controls {
  position: absolute;
  bottom: 12px;
  left: 12px;
  display:flex;
  gap:10px;
  align-items:center;
}

button {
  padding: 8px 12px;
  font-size: 14px;
  border-radius: 8px;
  border: none;
  background: #00ffd0;
  color: #002722;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0,0,0,0.35);
}

button:disabled { opacity: 0.5; cursor: not-allowed; }

#msg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  background: rgba(0,0,0,0.7);
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 16px;
}
.hidden { display: none; }