/* Square SMS — elevation. Restrained: borders do most of the work; shadows are quiet and only for genuinely floating surfaces. */
:root{
--shadow-card:0 1px 2px rgba(25,23,20,0.05);
--shadow-raised:0 2px 6px rgba(25,23,20,0.07),0 1px 2px rgba(25,23,20,0.05);
--shadow-overlay:0 12px 32px rgba(25,23,20,0.16),0 2px 8px rgba(25,23,20,0.08);
--shadow-focus:0 0 0 2px var(--surface-page),0 0 0 4px var(--focus-ring);
}