:root {
    --color-background-start: #040914;
    --color-background-game: #02060f;
    --color-slider-track: rgba(255, 255, 255, 0.15);
    --color-slider-track-active: rgba(255, 255, 255, 0.4);
    --color-slider-handle: #ffffff;
    --color-text-instruction: #e2e8f0;
    --color-moon-shadow: rgba(0, 0, 0, 0.85);
    
    --transition-duration-normal: 400ms;
    --transition-duration-slow: 800ms;
    
    --z-index-background: 1;
    --z-index-overlay: 2;
    --z-index-stars: 3;
    --z-index-moon-glow: 5;
    --z-index-moon: 6;
    --z-index-content: 10;
}