:root{--color-primary:#000;--color-secondary:#fff;--color-accent:#646cff;color-scheme:dark;--bg-primary:#000;--bg-secondary:#0a0a0a;--text-primary:#fff;--text-secondary:hsla(0,0%,100%,.7);--border-primary:hsla(0,0%,100%,.1);--card-bg:hsla(0,0%,100%,.05);--header-bg:rgba(0,0,0,.75)}[data-theme=light]{--bg-primary:#f5f5f5;--bg-secondary:#e5e5e5;--text-primary:#000;--text-secondary:rgba(0,0,0,.7);--border-primary:rgba(0,0,0,.15);--card-bg:rgba(0,0,0,.05);--header-bg:hsla(0,0%,96%,.9);color-scheme:light}:root{--font-primary:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Avenir,Helvetica,Arial,sans-serif;--font-weight-regular:400;--font-weight-medium:500;--font-weight-bold:700;--spacing-xs:0.5rem;--spacing-sm:1rem;--spacing-md:2rem;--spacing-lg:3rem;--spacing-xl:4rem;--breakpoint-sm:640px;--breakpoint-md:768px;--breakpoint-lg:1024px;--breakpoint-xl:1280px;--transition-fast:0.2s ease;--transition-normal:0.3s ease;--transition-slow:0.5s ease}