.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #0a0a0a, #1a0033);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  transition: opacity 0.5s ease;
}

.loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top: 3px solid #00ffff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 20px;
}

.loading-text {
  color: #fff;
  font-family: "Source Sans Pro", sans-serif;
  font-size: 1.2rem;
  font-weight: 300;
  letter-spacing: 2px;
  text-transform: uppercase;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Theme switcher */
.theme-switcher {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 8px;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.theme-switcher:hover {
  background: rgba(0, 0, 0, 0.9);
  border-color: rgba(255, 255, 255, 0.4);
}

.theme-btn {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 4px;
  transition: all 0.2s ease;
  font-family: "Source Sans Pro", sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.theme-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.theme-btn:active {
  transform: translateY(0);
}

/* Performance indicator */
.perf-indicator {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 8px 12px;
  color: #fff;
  font-family: "Source Sans Pro", sans-serif;
  font-size: 0.8rem;
  backdrop-filter: blur(10px);
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.perf-indicator:hover {
  opacity: 1;
}

    /* Enhanced game container */
    #content {
      /* background: rgba(0, 0, 0, 0.85); Removed for better visibility on mobile */
      /* backdrop-filter: blur(20px); */
      border-radius: 12px;
      /* box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5); */
      transition: all 0.3s ease;
    }

#content:hover {
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.7);
}

/* Enhanced CRT effects */
#b::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    transparent,
    transparent 2px,
    rgba(255, 255, 255, 0.03) 2px,
    rgba(255, 255, 255, 0.03) 4px
  );
  pointer-events: none;
  z-index: 1;
  animation: scanlines 8s linear infinite;
}

@keyframes scanlines {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(10px);
  }
}

/* Enhanced glow effects */
#b {
  border: 2px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.5),
    inset 0 0 20px rgba(255, 255, 255, 0.1);
  animation: flicker 0.15s infinite linear,
    glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  0% {
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.5),
      inset 0 0 20px rgba(255, 255, 255, 0.1);
  }
  100% {
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.8),
      inset 0 0 30px rgba(255, 255, 255, 0.2);
  }
}

/* Smooth transitions for all interactive elements */
* {
  transition: color 0.2s ease, background-color 0.2s ease,
    border-color 0.2s ease;
}