:root{--spacing-xs:0.25rem;--spacing-sm:0.5rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:2rem;--spacing-2xl:3rem;--spacing-3xl:4rem;--spacing-4xl:6rem;--spacing-5xl:8rem;--radius-none:0;--radius-sm:0.25rem;--radius-md:0.5rem;--radius-lg:0.75rem;--radius-xl:1rem;--radius-2xl:1.5rem;--radius-full:9999px;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -2px rgba(0,0,0,.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.1);--shadow-xl:0 20px 25px -5px rgba(0,0,0,.1),0 8px 10px -6px rgba(0,0,0,.1);--shadow-2xl:0 25px 50px -12px rgba(0,0,0,.25);--shadow-inner:inset 0 2px 4px 0 rgba(0,0,0,.05);--shadow-glow:0 0 20px rgba(59,130,246,.3);--shadow-glow-lg:0 0 40px rgba(59,130,246,.5);--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition-normal:300ms cubic-bezier(0.4,0,0.2,1);--transition-slow:500ms cubic-bezier(0.4,0,0.2,1);--transition-bounce:500ms cubic-bezier(0.68,-0.55,0.265,1.55);--z-hide:-1;--z-base:0;--z-dropdown:1000;--z-sticky:1020;--z-fixed:1030;--z-modal-backdrop:1040;--z-modal:1050;--z-popover:1060;--z-tooltip:1070;--z-notification:1080;--touch-target-sm:44px;--touch-target-md:48px;--touch-target-lg:56px;--brand-50:#eff6ff;--brand-100:#dbeafe;--brand-200:#bfdbfe;--brand-300:#93c5fd;--brand-400:#60a5fa;--brand-500:#3b82f6;--brand-600:#2563eb;--brand-700:#1d4ed8;--brand-800:#1e40af;--brand-900:#1e3a8a;--brand-950:#172554;--success-light:#10b981;--success-base:#059669;--success-dark:#047857;--warning-light:#f59e0b;--warning-base:#d97706;--warning-dark:#b45309;--error-light:#ef4444;--error-base:#dc2626;--error-dark:#b91c1c;--info-light:#3b82f6;--info-base:#2563eb;--info-dark:#1d4ed8}