motion-ui

Imported from VoTruongDanh/Skills-Agent (skills/motion-ui/SKILL.md). Install upstream with npx skills add VoTruongDanh/Skills-Agent --skill motion-ui. Copyright stays with the author.

Memory Protocol

START: Read .ai-memory.md from project root. Check design tokens, motion patterns, component library, animation conventions, and accessibility settings (prefers-reduced-motion). END: Update .ai-memory.md using Memory Compaction Rules with: motion patterns used, components created, animation decisions, and accessibility notes.

Goal

Create a clean, modern UI with subtle Framer Motion micro-interactions, clear states (idle/loading/success/error), and consistent styling via CSS variables/tokens. Motion should be purposeful, smooth, and enhance user experience without being distracting.

Design Philosophy (AMUI Principles)

1. Clarity-First

• States are always clear: idle / hover / active / loading / success / error / disabled
• Visual feedback for every interaction
• No ambiguous UI states

2. Motion with Purpose

Animation is not decoration, but serves to:

• Guide user attention
• Show system response
• Reduce jarring/abrupt UI changes
• Provide feedback and context

3. Subtle Micro-Interactions

• Hover: scale 1.01–1.02
• Tap/Active: scale 0.97–0.98
• No excessive bounce or dramatic effects
• Keep it elegant and professional

4. Immediate Feedback

• Validation shows instantly
• Submit actions show loading state
• Success shows with green check animation
• Errors show with alert animation

5. Brand Ambient Layer (Optional)

• Gradient backgrounds with blur orbs
• Dot grid patterns
• Subtle noise textures
• Use sparingly for auth/landing/empty states

Technical Stack

Required

• Framer Motion (motion, AnimatePresence) for smooth transitions
• CSS Variables for design tokens (colors, spacing, timing)
• Tailwind CSS or global CSS for styling

Recommended

• Lucide Icons for clean, consistent iconography
• TypeScript for type-safe components

Design Tokens System

Surface Colors

--c-bg: /* main background */
--c-surface: /* card/panel background */
--c-surface-2: /* hover surface */

Border Colors

--c-border: /* default border */
--c-border-strong: /* focus/active border */

Text Colors

--c-text-1: /* primary text */
--c-text-2: /* secondary text */
--c-text-3: /* muted text */
--c-text-4: /* disabled text */

Semantic Colors

--c-success: /* success text/icon */
--c-success-bg: /* success background */
--c-success-bd: /* success border */

--c-danger: /* error text/icon */
--c-danger-bg: /* error background */
--c-danger-bd: /* error border */

--c-warning: /* warning text/icon */
--c-warning-bg: /* warning background */
--c-warning-bd: /* warning border */

Motion Timing

--t-fast: 120ms;
--t-med: 180ms;
--t-slow: 260ms;
--ease-smooth: cubic-bezier(0.2, 0.8, 0.2, 1);

Motion Rules

Durations & Easing

• Small transitions (hover, focus): 120–180ms
• Enter/exit animations: 180–240ms
• Page/section transitions: 240–320ms
• Easing: easeOut for enter, easeIn for exit

Pattern 1: Fade + Slide (Standard Entry)

// Enter animation
initial={{ opacity: 0, y: 8 }}
animate={{ opacity: 1, y: 0 }}
transition={{ duration: 0.24, ease: "easeOut" }}

// Exit animation
exit={{ opacity: 0, y: -10 }}
transition={{ duration: 0.18, ease: "easeIn" }}

Pattern 2: Layout Shift Prevention

• Use AnimatePresence for conditional rendering
• Use layout prop for smooth layout changes
• Animate height changes smoothly (0 → auto)
• Prevent layout jumps during loading states

Pattern 3: Button Micro-Interactions

<motion.button
  whileHover={{ scale: loading ? 1 : 1.015 }}
  whileTap={{ scale: loading ? 1 : 0.975 }}
  transition={{ duration: 0.12 }}
>

Rules:

• Disabled buttons: no scale, reduced opacity, cursor not-allowed
• Loading buttons: maintain width, show spinner, disable interactions

State System

Form States

1. idle — Initial state, ready for input
2. editing — User is interacting
3. submitting — Loading, processing request
4. success — Action completed successfully
5. error — Action failed, show error message

Display Rules:

• submitting: disable inputs + button, show spinner, text "Processing..."
• error: show alert with icon + message, animate expand/collapse
• success: show green check icon panel, animate scale-in, auto-redirect

Input Validation States

1. default — No validation shown
2. focus — User is typing
3. valid — Input passes validation (optional green border/check)
4. invalid — Input fails validation (red border + error message)

UX Rules:

• Only show "invalid" after user interaction (touched) or submit attempt
• Show "valid" state subtly (optional)
• Error messages animate in/out smoothly

Component Patterns

1. AMUI Button

Required Features:

• 3 sizes: sm / md / lg
• 5 states: default / hover / active / loading / disabled
• Optional: leftIcon / rightIcon
• Motion: whileHover scale 1.015, whileTap scale 0.975

Loading Behavior:

• Set aria-busy="true"
• Disable click events
• Show spinner + text
• Maintain button width (no layout jump)

2. AMUI Input

Required Features:

• Label + optional hint text
• Error message with animation
• Optional left/right icons
• Focus ring (subtle, using tokens)
• Validation states

Animation:

• Error message: expand/collapse with height + opacity
• Focus ring: fade in/out

3. AMUI Alert / Toast

Variants:

• Success: light green bg + green border + check icon
• Error: light red bg + red border + alert icon
• Warning: light yellow bg + yellow border + warning icon
• Info: light blue bg + blue border + info icon

Animation:

• Enter: opacity 0→1, y 8→0
• Exit: opacity 1→0, y 0→-10
• Use AnimatePresence for mount/unmount

4. AMUI Success Check View

Pattern: When action succeeds, transition entire panel to:

• Large check icon in circle
• "Success" heading
• Optional subtext
• Scale-in animation (0.98 → 1) + fade-in

Example Use Cases:

• Login success
• Form submission success
• Payment confirmation
• Account creation

5. AMUI Card / Panel

Features:

• Subtle shadow
• Border using tokens
• Hover state (optional lift effect)
• Smooth transitions

6. AMUI Modal / Dialog

Animation:

• Backdrop: fade in/out
• Content: fade + scale (0.95 → 1)
• Use AnimatePresence for mount/unmount

Ambient Background Layer

When to Use

• Auth pages (login, register)
• Onboarding flows
• Empty states
• Dashboard landing pages

When NOT to Use

• Dense data tables
• Forms with lots of inputs
• Content-heavy pages

Implementation

<div className="ambient-bg">
  {/* Gradient base */}
  <div className="gradient-layer" />
  
  {/* Blur orbs */}
  <motion.div 
    className="orb orb-1"
    animate={{ 
      scale: [1, 1.1, 1],
      opacity: [0.3, 0.5, 0.3]
    }}
    transition={{ 
      duration: 8, 
      repeat: Infinity,
      ease: "easeInOut"
    }}
  />
  
  {/* Optional: dot grid */}
  <div className="dot-grid" />
</div>

Rules:

• Large blur radius (100px+)
• Low opacity (0.2–0.5)
• Slow animation (7–12s)
• pointer-events: none
• Don't cause eye strain

Accessibility Requirements

Motion

• Respect prefers-reduced-motion media query
• Disable/reduce animations when user prefers reduced motion

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

Buttons

• aria-busy when loading
• disabled attribute when disabled
• Clear focus-visible ring
• Keyboard accessible

Alerts

• Use role="alert" for error/success messages
• Ensure screen readers announce state changes

Color Contrast

• Text on backgrounds must meet WCAG AA (4.5:1 for normal text)
• Test gradients and ambient backgrounds for contrast

Agent Routing

• Primary → read .kiro/skills/agents/agents/frontend-specialist.md and apply its knowledge
• For accessibility → apply WCAG knowledge from frontend-specialist
• For performance → ensure animations don't cause jank

Socratic Gate

Before implementing Motion UI, verify:

1. What component/page needs motion UI? (button, form, modal, page?)
2. What states need to be shown? (loading, success, error?)
3. Are there existing design tokens or should we create them?
4. Should we use ambient background layer? If any answer is unclear, ASK before proceeding.

Workflow

1. Read Memory — Load .ai-memory.md for design tokens and motion patterns.
2. Identify the component/page to implement.
3. Set up design tokens if not present (CSS variables).
4. Implement component with all required states.
5. Add Framer Motion animations following AMUI patterns.
6. Ensure accessibility (aria attributes, focus management, reduced motion).
7. Test all states: idle, hover, active, loading, success, error, disabled.
8. Quality Gate — Read .kiro/skills/_scripts/checklist.md for verification.
9. Update Memory — Save motion patterns and tokens to .ai-memory.md.

Checklist

• Component/page identified

• Design tokens defined (colors, timing, easing)

• All states implemented (idle/hover/active/loading/success/error/disabled)

• Framer Motion animations added (fade, slide, scale)

• Micro-interactions on buttons (whileHover, whileTap)

• AnimatePresence for conditional UI

• Layout shift prevention (stable widths, smooth height changes)

• Accessibility: aria attributes, focus management

• prefers-reduced-motion support

• Color contrast verified (WCAG AA)

• Memory file updated

• Clean code chuẩn (Standard clean code applied)

• Cập nhật đầy đủ tất cả các file liên quan (All related files fully updated)

Rules

• Motion should enhance, not distract.
• Keep animations subtle and purposeful.
• Always provide immediate visual feedback.
• Maintain layout stability (no jumps during loading).
• Respect user motion preferences.
• Use design tokens consistently.
• Test all interactive states.
• Always read and update the memory file.

Quality Gate

After completing, read .kiro/skills/_scripts/checklist.md for cross-cutting quality checks.

Related Skills

• /create → read .kiro/skills/create/SKILL.md — Create new motion UI components
• /ui-ux-pro-max → read .kiro/skills/ui-ux-pro-max/SKILL.md — Advanced UI/UX improvements
• /enhance → read .kiro/skills/enhance/SKILL.md — Improve existing components with motion

Encoding

All code snippets and example files referenced or produced by this skill must be UTF-8 encoded. When applicable, include encoding: "UTF-8" in SKILL.md front-matter and ensure saved files use UTF-8 (no BOM).

Example: AMUI Button Component

import { motion } from 'framer-motion';
import { Loader2 } from 'lucide-react';

interface AMUIButtonProps {
  children: React.ReactNode;
  variant?: 'primary' | 'secondary' | 'ghost';
  size?: 'sm' | 'md' | 'lg';
  loading?: boolean;
  disabled?: boolean;
  leftIcon?: React.ReactNode;
  rightIcon?: React.ReactNode;
  onClick?: () => void;
}

export function AMUIButton({
  children,
  variant = 'primary',
  size = 'md',
  loading = false,
  disabled = false,
  leftIcon,
  rightIcon,
  onClick,
}: AMUIButtonProps) {
  const isDisabled = disabled || loading;

  return (
    <motion.button
      className={`amui-btn amui-btn-${variant} amui-btn-${size}`}
      onClick={onClick}
      disabled={isDisabled}
      aria-busy={loading}
      whileHover={{ scale: isDisabled ? 1 : 1.015 }}
      whileTap={{ scale: isDisabled ? 1 : 0.975 }}
      transition={{ duration: 0.12 }}
    >
      {loading && <Loader2 className="amui-btn-spinner" />}
      {!loading && leftIcon && <span className="amui-btn-icon-left">{leftIcon}</span>}
      <span className="amui-btn-text">{children}</span>
      {!loading && rightIcon && <span className="amui-btn-icon-right">{rightIcon}</span>}
    </motion.button>
  );
}

Example: AMUI Success View

import { motion } from 'framer-motion';
import { CheckCircle } from 'lucide-react';

interface AMUISuccessViewProps {
  title?: string;
  message?: string;
}

export function AMUISuccessView({ 
  title = 'Success!', 
  message 
}: AMUISuccessViewProps) {
  return (
    <motion.div
      className="amui-success-view"
      initial={{ opacity: 0, scale: 0.98 }}
      animate={{ opacity: 1, scale: 1 }}
      transition={{ duration: 0.24, ease: 'easeOut' }}
    >
      <motion.div
        className="amui-success-icon"
        initial={{ scale: 0 }}
        animate={{ scale: 1 }}
        transition={{ 
          duration: 0.3, 
          delay: 0.1,
          type: 'spring',
          stiffness: 200
        }}
      >
        <CheckCircle size={48} />
      </motion.div>
      <h2 className="amui-success-title">{title}</h2>
      {message && <p className="amui-success-message">{message}</p>}
    </motion.div>
  );
}

Example: AMUI Alert with Animation

import { motion, AnimatePresence } from 'framer-motion';
import { AlertCircle, CheckCircle, Info, AlertTriangle } from 'lucide-react';

interface AMUIAlertProps {
  type: 'success' | 'error' | 'warning' | 'info';
  message: string;
  visible: boolean;
}

const icons = {
  success: CheckCircle,
  error: AlertCircle,
  warning: AlertTriangle,
  info: Info,
};

export function AMUIAlert({ type, message, visible }: AMUIAlertProps) {
  const Icon = icons[type];

  return (
    <AnimatePresence>
      {visible && (
        <motion.div
          className={`amui-alert amui-alert-${type}`}
          role="alert"
          initial={{ opacity: 0, height: 0, y: -10 }}
          animate={{ opacity: 1, height: 'auto', y: 0 }}
          exit={{ opacity: 0, height: 0, y: -10 }}
          transition={{ duration: 0.2 }}
        >
          <Icon className="amui-alert-icon" size={20} />
          <span className="amui-alert-message">{message}</span>
        </motion.div>
      )}
    </AnimatePresence>
  );
}