:root {
  --background: 228 30% 10%;
  --foreground: 210 40% 96%;
  --primary: 187 100% 56%;
  --secondary: 241 32% 18%;
  --muted: 231 20% 30%;
  --destructive: 0 84% 60%;
  --border: 231 22% 28%;
  --card: 231 28% 14%;
  --shadow-sm: 0 8px 24px hsl(230 40% 4% / 0.18);
  --shadow-md: 0 16px 40px hsl(230 50% 2% / 0.32);
  --shadow-lg: 0 0 0 1px hsl(var(--primary) / 0.14), 0 18px 50px hsl(var(--primary) / 0.22);
  --transition-fast: 140ms ease;
  --transition-smooth: 280ms cubic-bezier(0.22, 1, 0.36, 1);
  --radius-sm: 0.65rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
}

.dark {
  --background: 228 30% 10%;
  --foreground: 210 40% 96%;
  --primary: 187 100% 56%;
  --secondary: 241 32% 18%;
  --muted: 231 20% 30%;
  --destructive: 0 84% 60%;
  --border: 231 22% 28%;
  --card: 231 28% 14%;
}

html, body, #root {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: hsl(var(--background));
  color: hsl(var(--foreground));
}

* {
  box-sizing: border-box;
}

button, a {
  transition: transform var(--transition-fast), background-color var(--transition-smooth), border-color var(--transition-smooth), color var(--transition-smooth), box-shadow var(--transition-smooth), opacity var(--transition-fast);
}

.game-arena {
  cursor: crosshair;
}

.game-arena::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(hsl(var(--border) / 0.24) 1px, transparent 1px),
    linear-gradient(90deg, hsl(var(--border) / 0.24) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}

.game-arena::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 28%;
  background: linear-gradient(180deg, transparent, hsl(var(--primary) / 0.08));
  pointer-events: none;
}

.target-pop {
  animation: target-bob 1.1s ease-in-out infinite alternate;
}

@keyframes target-bob {
  from {
    filter: saturate(1);
  }
  to {
    filter: saturate(1.25);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}