:root{
--radius-xs:4px;--radius-sm:6px;--radius-md:8px;--radius-lg:10px;--radius-full:999px;
/* Elevation = surface step + 1px border. Flat by principle: no glows, no neon, no corner gradients. */
--shadow-1:0 1px 2px rgba(0,0,0,0.3);--shadow-2:0 8px 24px rgba(0,0,0,0.3);--shadow-3:0 16px 48px rgba(0,0,0,0.35);
--glow-accent:0 0 0 1px var(--accent-border); /* legacy alias — now just a 1px ring, intentionally not a glow */
--focus-ring:0 0 0 2px var(--bg-0),0 0 0 4px var(--info);
--blur-overlay:8px;
}