Design Tools
Multi-Layer Engine
CSS Box-Shadow Studio
Stack subtle layers of shadows to create smooth, natural elevation for cards, dropdowns, and buttons.
Elevation Presets
Shadow Layers
Live Viewport
Target Element
CSS Code Output
box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);The Secret Behind Smooth CSS Shadows
A single harsh CSS shadow often looks cheap and artificial. In the physical world, light bounces off ambient surfaces, creating multiple penumbra falloffs. Stacking two or three subtle shadows—a tight high-opacity ambient shadow paired with an expansive, low-opacity diffuse shadow—achieves the polished depth seen in top design systems.
Frequently Asked Questions
A positive spread expands the shadow bounding box outward in all directions before blur is applied, while a negative spread shrinks the shadow, creating a tight inset effect that anchors elements close to the surface.