use-shadows-appropriately

name	use-shadows-appropriately
description	Add depth only when functionally necessary (elevation, not decoration)
domain	ui-design
skill-type	corrective
version	1.0.0
author	refactoring-ui-expert
prerequisites	[]
dependencies	[]

Skill: Use Shadows Appropriately

Purpose

Add depth and elevation only when functionally necessary, avoiding decorative shadows.

Key Fix Applied (from Autoresearch)

Added nuance: Subtle shadows on cards are acceptable (less distracting than borders). Large decorative shadows on static elements are wrong.

Type

Corrective + Evaluative

Input

• UI element inventory
• Element purposes (static, interactive, overlay)
• Current shadow specifications

Output

• Shadow usage recommendations
• Pass/Fail assessment

Transformation Performed

Removes decorative shadows from static elements, reserves shadows for elevation layers (modals above content, dropdowns above page).

Decision Criteria

PASS (Appropriate Shadow Usage)

• Small shadows on cards (subtle, less distracting than borders) ✅
• Modals/dialogs: Large shadow (elevated above all content)
• Dropdowns/menus: Medium shadow (above page, below modals)
• Cards: Subtle or no shadow (flat design preferred)
• Hover states: Subtle shadow increase (affordance for clickability)
• Static elements: No shadow
• Consistent shadow system (2-3 levels max)

FAIL (Inappropriate Shadow Usage)

• Large decorative shadows on static cards
• Heavy shadows on static content
• Inconsistent shadow values
• Decorative shadows that don't indicate elevation
• Shadows on text or icons

Nuance (Key Insight)

Subtle shadows (small blur, low opacity) on cards are OK. The book recommends them as alternative to borders. Large, flashy shadows on static content are wrong.

Shadow Elevation Scale

Level	Use Case	CSS Example (approximate)
None	Static content, text, icons	none
Subtle	Cards (alternative to borders)	0 2px 4px rgba(0,0,0,0.1)
Low	Raised cards, buttons	0 4px 6px rgba(0,0,0,0.1)
Medium	Dropdowns, popovers, tooltips	0 10px 15px rgba(0,0,0,0.1)
High	Modals, dialogs, drawers	0 20px 25px rgba(0,0,0,0.15)

Shadow Principles

1. Shadows indicate elevation - Higher = closer to user
2. Shadows indicate interactivity - Clickable things can have shadow
3. Shadows separate layers - Modal casts shadow on page behind it
4. Shadows should be subtle - Good shadows are barely noticeable
5. Consistency matters - Same elevation = same shadow

Common Failure Modes

Failure	Description	Fix
Shadow Carpet	Every card has a shadow	Flatten static cards, subtle shadows OK
Drop Shadow Abuse	Heavy shadows on static elements	Reserve for elevation/interaction
Inconsistent Depth	Similar elements different shadows	Create 2-3 shadow levels, apply consistently
Black Shadows	Pure black shadows (harsh)	Use rgba with low opacity, tinted to brand
No Modal Separation	Modal doesn't feel above page	Increase shadow spread and blur

Prerequisites

• Visual hierarchy established
• Understanding of which elements are interactive

Dependencies

• eliminate-visual-clutter (shadows often add clutter)

Refactoring UI References

• "Use shadows to convey elevation"
• "Use a box shadow instead of hard borders - subtle shadows outline effectively without visual clutter"
• "Shadows should be subtle"

Example Assessment

Input: Page with card shadows (0 4px 6px rgba(0,0,0,0.1)), button shadows (0 2px 4px), modal shadow (0 4px 6px), text with text-shadow

Evaluation: FAIL (cluttered)

• Cards don't need shadows (static content)
• Modal shadow same as cards (should be higher)
• Text shadow decorative

Recommendation:

• Remove card shadows OR use subtle (0 2px 4px)
• Remove text shadow
• Modal: 0 20px 25px rgba(0,0,0,0.15)
• Buttons: Optional subtle hover shadow only