Shadow Elevation

Elevation System

Define Levels

--elevation-0: none;                              /* Flat, same plane */
--elevation-1: 0 1px 3px rgba(0,0,0,0.08);        /* Slight lift: cards, buttons */
--elevation-2: 0 4px 8px rgba(0,0,0,0.12);        /* Medium: dropdowns, popovers */
--elevation-3: 0 8px 24px rgba(0,0,0,0.16);       /* High: modals, dialogs */
--elevation-4: 0 16px 48px rgba(0,0,0,0.20);      /* Highest: floating panels */

Rules

1. Higher = closer to user. Modals above dropdowns above cards.
2. Shadows go down. Light source is always from above.
3. Larger shadows are softer. Spread increases with elevation.
4. Dark mode: Reduce shadow opacity OR use surface color lightening instead.
5. Consistent across the product. Same elevation level = same shadow value.