* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a0a12;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: #e8e8f0;
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  outline: none;
}

.hidden {
  display: none !important;
}

/* Loading Screen */
#loading-screen {
  position: fixed;
  inset: 0;
  background: linear-gradient(160deg, #0a0a18 0%, #12122a 50%, #0d1a2a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.loading-content {
  text-align: center;
  max-width: 420px;
  padding: 2rem;
}

.logo {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  background: linear-gradient(90deg, #00d4ff, #7b5cff, #ff4d8d);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.4rem;
  text-shadow: 0 0 40px rgba(0, 212, 255, 0.3);
}

.tagline {
  font-size: 0.85rem;
  letter-spacing: 0.35em;
  color: #8a8aaa;
  margin-bottom: 2.5rem;
}

.progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 1rem;
}

#progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #00d4ff, #7b5cff);
  border-radius: 3px;
  transition: width 0.3s ease;
}

#loading-text {
  font-size: 0.9rem;
  color: #6a6a8a;
}

/* Toast */
#toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10, 12, 25, 0.92);
  border: 1px solid rgba(0, 212, 255, 0.4);
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  z-index: 9000;
  pointer-events: none;
  transition: opacity 0.3s;
}

#toast.show {
  opacity: 1;
}

#toast.hidden {
  opacity: 0;
}

#btn-gyro.active {
  box-shadow: 0 0 18px rgba(0, 212, 255, .75);
  border-color: rgba(0, 212, 255, .9);
}