fix: improve demo performance and fix broken component animations

- Add IntersectionObserver-based visibility pausing to AnimationLoopService
  (registerWithElement) so canvas components auto-pause when off-screen
- Fix voronoi-mesh: increase step size, add cell cache with invalidation
- Fix particle-field: replace O(n²) connections with spatial grid partitioning
- Fix ambient-light: remove GPU-killing blur filters, use inset -20% instead
- Tune demo: reduce particle/seed counts, remove always-on floating-layers
- Fix celebration components: move effect() inside afterNextRender so canvas
  is ready, pass [active]="true", render as fixed overlays instead of inline
- Fix one-shot text effects (typewriter, scramble-reveal, counter-rollup):
  defer animation until element is visible via IntersectionObserver

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

demo/angular.json

@@ -0,0 +1,34 @@
+{
+  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
+  "version": 1,
+  "newProjectRoot": "projects",
+  "projects": {
+    "demo": {
+      "projectType": "application",
+      "root": "",
+      "sourceRoot": "src",
+      "prefix": "app",
+      "architect": {
+        "build": {
+          "builder": "@angular-devkit/build-angular:application",
+          "options": {
+            "outputPath": "dist",
+            "index": "src/index.html",
+            "browser": "src/main.ts",
+            "polyfills": ["zone.js"],
+            "tsConfig": "tsconfig.app.json",
+            "styles": ["src/styles.scss"],
+            "scripts": [],
+            "preserveSymlinks": true
+          }
+        },
+        "serve": {
+          "builder": "@angular-devkit/build-angular:dev-server",
+          "options": {
+            "buildTarget": "demo:build"
+          }
+        }
+      }
+    }
+  }
+}

demo/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "flair-elements-ui-demo",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "start": "ng serve --port 4203",
+    "build": "ng build"
+  },
+  "dependencies": {
+    "@angular/animations": "^19.1.0",
+    "@angular/common": "^19.1.0",
+    "@angular/compiler": "^19.1.0",
+    "@angular/core": "^19.1.0",
+    "@angular/platform-browser": "^19.1.0",
+    "@angular/platform-browser-dynamic": "^19.1.0",
+    "@sda/flair-elements-ui": "file:../dist",
+    "@sda/base-ui": "file:../../base-ui/dist"
+  },
+  "devDependencies": {
+    "@angular-devkit/build-angular": "^19.1.0",
+    "@angular/cli": "^19.1.0",
+    "@angular/compiler-cli": "^19.1.0",
+    "typescript": "~5.5.0"
+  }
+}

demo/src/app.component.ts

@@ -0,0 +1,833 @@
+import { Component } from '@angular/core';
+import {
+  // Scroll & Progress
+  FlScrollProgressComponent,
+
+  // Backgrounds & Fields
+  FlParticleFieldComponent,
+  FlFlowFieldComponent,
+  FlMatrixRainComponent,
+  FlAuroraComponent,
+  FlVoronoiMeshComponent,
+  FlFractalLandscapeComponent,
+  FlAmbientLightComponent,
+  FlFloatingLayersComponent,
+
+  // Text Effects
+  FlGradientTextComponent,
+  FlTypewriterComponent,
+  FlTextShimmerComponent,
+  FlGlitchTextComponent,
+  FlScrambleRevealComponent,
+  FlCounterRollupComponent,
+
+  // Cards
+  FlTiltCardComponent,
+  FlHolographicCardComponent,
+  FlSpotlightCardComponent,
+
+  // Generative Art
+  FlBlobComponent,
+  FlGenerativePatternComponent,
+  FlGradientMeshComponent,
+
+  // Dividers
+  FlWaveDividerComponent,
+  FlGradientDividerComponent,
+  FlGlowDividerComponent,
+
+  // Celebrations
+  FlConfettiComponent,
+  FlFireworksComponent,
+  FlSparkleComponent,
+  FlEmojiRainComponent,
+  FlCheckmarkFlourishComponent,
+
+  // Patterns & Textures
+  FlDotGridComponent,
+  FlBlueprintGridComponent,
+  FlTopographicLinesComponent,
+  FlCircuitBoardComponent,
+
+  // Status Indicators
+  FlBreathingDotComponent,
+  FlLiveIndicatorComponent,
+  FlSignalStrengthComponent,
+  FlHeartbeatLineComponent,
+
+  // Directives
+  FlHoverLiftDirective,
+  FlMagneticDirective,
+  FlRippleDirective,
+  FlNeonGlowDirective,
+  FlCursorGlowDirective,
+  FlRevealOnScrollDirective,
+  FlPressSquishDirective,
+  FlTextGradientDirective,
+} from '@sda/flair-elements-ui';
+
+@Component({
+  selector: 'app-root',
+  standalone: true,
+  imports: [
+    // Scroll & Progress
+    FlScrollProgressComponent,
+
+    // Backgrounds & Fields
+    FlParticleFieldComponent,
+    FlFlowFieldComponent,
+    FlMatrixRainComponent,
+    FlAuroraComponent,
+    FlVoronoiMeshComponent,
+    FlFractalLandscapeComponent,
+    FlAmbientLightComponent,
+
+    // Text Effects
+    FlGradientTextComponent,
+    FlTypewriterComponent,
+    FlTextShimmerComponent,
+    FlGlitchTextComponent,
+    FlScrambleRevealComponent,
+    FlCounterRollupComponent,
+
+    // Cards
+    FlTiltCardComponent,
+    FlHolographicCardComponent,
+    FlSpotlightCardComponent,
+
+    // Generative Art
+    FlBlobComponent,
+    FlGenerativePatternComponent,
+    FlGradientMeshComponent,
+
+    // Dividers
+    FlWaveDividerComponent,
+    FlGradientDividerComponent,
+    FlGlowDividerComponent,
+
+    // Celebrations
+    FlConfettiComponent,
+    FlFireworksComponent,
+    FlSparkleComponent,
+    FlEmojiRainComponent,
+    FlCheckmarkFlourishComponent,
+
+    // Patterns & Textures
+    FlDotGridComponent,
+    FlBlueprintGridComponent,
+    FlTopographicLinesComponent,
+    FlCircuitBoardComponent,
+
+    // Status Indicators
+    FlBreathingDotComponent,
+    FlLiveIndicatorComponent,
+    FlSignalStrengthComponent,
+    FlHeartbeatLineComponent,
+
+    // Directives
+    FlHoverLiftDirective,
+    FlMagneticDirective,
+    FlRippleDirective,
+    FlNeonGlowDirective,
+    FlCursorGlowDirective,
+    FlRevealOnScrollDirective,
+    FlPressSquishDirective,
+    FlTextGradientDirective,
+  ],
+  template: `
+    <div class="showcase">
+      <!-- Ambient Background Effects -->
+      <fl-ambient-light class="ambient-bg" [opacity]="0.15" [blur]="60"></fl-ambient-light>
+
+      <!-- 1. HERO SECTION -->
+      <fl-scroll-progress class="scroll-progress"></fl-scroll-progress>
+
+      <section class="hero">
+        <fl-particle-field class="hero-particles" [count]="50"></fl-particle-field>
+        <div class="hero-content">
+          <fl-gradient-text
+            [colors]="['#ff0080', '#7928ca', '#0070f3']"
+            class="hero-title">
+            Flair Elements UI
+          </fl-gradient-text>
+          <fl-typewriter
+            [text]="'Stunning visual effects and animations for modern web applications'"
+            [speed]="50"
+            class="hero-subtitle">
+          </fl-typewriter>
+        </div>
+      </section>
+
+      <fl-wave-divider></fl-wave-divider>
+
+      <!-- 2. INTERACTIVE CARDS -->
+      <section class="section">
+        <h2 class="section-title" flRevealOnScroll>Interactive Cards</h2>
+        <div class="cards-grid">
+          <fl-tilt-card>
+            <div class="card-content">
+              <h3>Tilt Card</h3>
+              <p>3D tilt effect that follows your cursor</p>
+            </div>
+          </fl-tilt-card>
+
+          <fl-holographic-card>
+            <div class="card-content">
+              <h3>Holographic Card</h3>
+              <p>Iridescent holographic shimmer effect</p>
+            </div>
+          </fl-holographic-card>
+
+          <fl-spotlight-card>
+            <div class="card-content">
+              <h3>Spotlight Card</h3>
+              <p>Dynamic spotlight that follows your mouse</p>
+            </div>
+          </fl-spotlight-card>
+        </div>
+      </section>
+
+      <fl-gradient-divider [colors]="['#ff0080', '#7928ca']"></fl-gradient-divider>
+
+      <!-- 3. TEXT EFFECTS -->
+      <section class="section">
+        <h2 class="section-title" flRevealOnScroll>Text Effects</h2>
+        <div class="text-effects">
+          <div class="text-effect-item">
+            <label>Gradient Text:</label>
+            <fl-gradient-text
+              [colors]="['#f093fb', '#f5576c']">
+              Beautiful Gradients
+            </fl-gradient-text>
+          </div>
+
+          <div class="text-effect-item">
+            <label>Shimmer:</label>
+            <fl-text-shimmer>Shimmering Effect</fl-text-shimmer>
+          </div>
+
+          <div class="text-effect-item">
+            <label>Glitch:</label>
+            <fl-glitch-text [text]="'Glitch Effect'"></fl-glitch-text>
+          </div>
+
+          <div class="text-effect-item">
+            <label>Scramble Reveal:</label>
+            <fl-scramble-reveal [text]="'Decoded Message'"></fl-scramble-reveal>
+          </div>
+
+          <div class="text-effect-item">
+            <label>Counter:</label>
+            <fl-counter-rollup
+              [value]="9999"
+              [duration]="2000">
+            </fl-counter-rollup>
+          </div>
+        </div>
+      </section>
+
+      <fl-glow-divider [color]="'#0070f3'"></fl-glow-divider>
+
+      <!-- 4. CANVAS BACKGROUNDS -->
+      <section class="section">
+        <h2 class="section-title" flRevealOnScroll>Canvas Backgrounds</h2>
+        <div class="canvas-grid">
+          <div class="canvas-box">
+            <fl-flow-field [particleCount]="400"></fl-flow-field>
+            <span class="canvas-label">Flow Field</span>
+          </div>
+
+          <div class="canvas-box">
+            <fl-matrix-rain></fl-matrix-rain>
+            <span class="canvas-label">Matrix Rain</span>
+          </div>
+
+          <div class="canvas-box">
+            <fl-aurora></fl-aurora>
+            <span class="canvas-label">Aurora</span>
+          </div>
+
+          <div class="canvas-box">
+            <fl-voronoi-mesh [seedCount]="15"></fl-voronoi-mesh>
+            <span class="canvas-label">Voronoi Mesh</span>
+          </div>
+
+          <div class="canvas-box">
+            <fl-fractal-landscape></fl-fractal-landscape>
+            <span class="canvas-label">Fractal Landscape</span>
+          </div>
+        </div>
+      </section>
+
+      <fl-wave-divider></fl-wave-divider>
+
+      <!-- 5. GENERATIVE ART -->
+      <section class="section">
+        <h2 class="section-title" flRevealOnScroll>Generative Art</h2>
+        <div class="generative-grid">
+          <div class="generative-box">
+            <fl-blob></fl-blob>
+            <span class="canvas-label">Blob</span>
+          </div>
+
+          <div class="generative-box">
+            <fl-generative-pattern></fl-generative-pattern>
+            <span class="canvas-label">Generative Pattern</span>
+          </div>
+
+          <div class="generative-box">
+            <fl-gradient-mesh [points]="3" [blur]="40"></fl-gradient-mesh>
+            <span class="canvas-label">Gradient Mesh</span>
+          </div>
+        </div>
+      </section>
+
+      <fl-gradient-divider [colors]="['#0070f3', '#00dfd8']"></fl-gradient-divider>
+
+      <!-- 7. CELEBRATIONS -->
+      <section class="section celebrations-section">
+        <h2 class="section-title" flRevealOnScroll>Celebrations</h2>
+        <div class="celebrations">
+          <button (click)="triggerConfetti = true" flPressSquish class="celebration-btn">
+            Confetti
+          </button>
+
+          <button (click)="triggerFireworks = true" flPressSquish class="celebration-btn">
+            Fireworks
+          </button>
+
+          <button (click)="triggerSparkle = true" flPressSquish class="celebration-btn">
+            Sparkle
+          </button>
+
+          <button (click)="triggerEmoji = true" flPressSquish class="celebration-btn">
+            Emoji Rain
+          </button>
+
+          <button (click)="triggerCheckmark = true" flPressSquish class="celebration-btn">
+            Checkmark
+          </button>
+        </div>
+
+        @if (triggerConfetti) {
+          <fl-confetti class="celebration-overlay" [active]="true"></fl-confetti>
+        }
+        @if (triggerFireworks) {
+          <fl-fireworks class="celebration-overlay" [active]="true"></fl-fireworks>
+        }
+        @if (triggerSparkle) {
+          <fl-sparkle class="celebration-overlay" [active]="true"></fl-sparkle>
+        }
+        @if (triggerEmoji) {
+          <fl-emoji-rain class="celebration-overlay" [active]="true" [emojis]="['🎉', '🎊', '⭐', '💫']"></fl-emoji-rain>
+        }
+        @if (triggerCheckmark) {
+          <fl-checkmark-flourish class="celebration-overlay" [active]="true"></fl-checkmark-flourish>
+        }
+      </section>
+
+      <fl-glow-divider [color]="'#7928ca'"></fl-glow-divider>
+
+      <!-- 8. DIRECTIVES -->
+      <section class="section">
+        <h2 class="section-title" flRevealOnScroll>Interactive Directives</h2>
+        <div class="directives-grid">
+          <div class="directive-card" flHoverLift>
+            <h4>Hover Lift</h4>
+            <p>Elevates on hover</p>
+          </div>
+
+          <div class="directive-card" flMagnetic>
+            <h4>Magnetic</h4>
+            <p>Attracted to cursor</p>
+          </div>
+
+          <div class="directive-card" flRipple>
+            <h4>Ripple</h4>
+            <p>Click for ripple effect</p>
+          </div>
+
+          <div class="directive-card" flNeonGlow>
+            <h4>Neon Glow</h4>
+            <p>Glowing neon border</p>
+          </div>
+
+          <div class="directive-card" flCursorGlow>
+            <h4>Cursor Glow</h4>
+            <p>Glow follows cursor</p>
+          </div>
+
+          <div class="directive-card" flRevealOnScroll>
+            <h4>Reveal on Scroll</h4>
+            <p>Animates into view</p>
+          </div>
+
+          <div class="directive-card" flPressSquish>
+            <h4>Press Squish</h4>
+            <p>Click to squish</p>
+          </div>
+
+          <div class="directive-card">
+            <h4 flTextGradient>Text Gradient</h4>
+            <p>Gradient text directive</p>
+          </div>
+        </div>
+      </section>
+
+      <fl-wave-divider></fl-wave-divider>
+
+      <!-- 9. PATTERNS & TEXTURES -->
+      <section class="section">
+        <h2 class="section-title" flRevealOnScroll>Patterns & Textures</h2>
+        <div class="patterns-grid">
+          <div class="pattern-box">
+            <fl-dot-grid></fl-dot-grid>
+            <span class="canvas-label">Dot Grid</span>
+          </div>
+
+          <div class="pattern-box">
+            <fl-blueprint-grid></fl-blueprint-grid>
+            <span class="canvas-label">Blueprint Grid</span>
+          </div>
+
+          <div class="pattern-box">
+            <fl-topographic-lines></fl-topographic-lines>
+            <span class="canvas-label">Topographic Lines</span>
+          </div>
+
+          <div class="pattern-box">
+            <fl-circuit-board></fl-circuit-board>
+            <span class="canvas-label">Circuit Board</span>
+          </div>
+        </div>
+      </section>
+
+      <fl-gradient-divider [colors]="['#ff0080', '#00dfd8']"></fl-gradient-divider>
+
+      <!-- 10. STATUS INDICATORS -->
+      <section class="section">
+        <h2 class="section-title" flRevealOnScroll>Status Indicators</h2>
+        <div class="status-grid">
+          <div class="status-item">
+            <fl-breathing-dot [color]="'#00ff00'"></fl-breathing-dot>
+            <span>Breathing Dot</span>
+          </div>
+
+          <div class="status-item">
+            <fl-live-indicator></fl-live-indicator>
+            <span>Live Indicator</span>
+          </div>
+
+          <div class="status-item">
+            <fl-signal-strength [level]="4"></fl-signal-strength>
+            <span>Signal Strength</span>
+          </div>
+
+          <div class="status-item">
+            <fl-heartbeat-line [color]="'#ff0080'"></fl-heartbeat-line>
+            <span>Heartbeat Line</span>
+          </div>
+        </div>
+      </section>
+
+      <fl-glow-divider [color]="'#ff0080'"></fl-glow-divider>
+
+      <!-- 11. AMBIENT -->
+      <section class="section final-section">
+        <h2 class="section-title" flRevealOnScroll>Ambient Effects</h2>
+        <p class="ambient-note">
+          Ambient Light is active throughout this entire showcase,
+          creating subtle atmospheric effects in the background.
+        </p>
+      </section>
+
+      <footer class="footer">
+        <fl-gradient-text
+          [colors]="['#ff0080', '#7928ca', '#0070f3']">
+          Built with Flair Elements UI
+        </fl-gradient-text>
+      </footer>
+    </div>
+  `,
+  styles: [`
+    :host {
+      display: block;
+      background: #0a0a0f;
+      color: #ffffff;
+      min-height: 100vh;
+    }
+
+    .showcase {
+      position: relative;
+      overflow-x: hidden;
+    }
+
+    /* Ambient Backgrounds */
+    .ambient-bg {
+      position: fixed;
+      top: 0;
+      left: 0;
+      width: 100%;
+      height: 100%;
+      z-index: 0;
+      pointer-events: none;
+      opacity: 0.3;
+    }
+
+    /* Scroll Progress */
+    .scroll-progress {
+      position: fixed;
+      top: 0;
+      left: 0;
+      width: 100%;
+      z-index: 1000;
+    }
+
+    /* Hero Section */
+    .hero {
+      position: relative;
+      height: 100vh;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      overflow: hidden;
+    }
+
+    .hero-particles {
+      position: absolute;
+      top: 0;
+      left: 0;
+      width: 100%;
+      height: 100%;
+      z-index: 1;
+    }
+
+    .hero-content {
+      position: relative;
+      z-index: 2;
+      text-align: center;
+      padding: 2rem;
+      max-width: 1200px;
+    }
+
+    .hero-title {
+      font-size: 5rem;
+      font-weight: 900;
+      margin-bottom: 2rem;
+      line-height: 1.2;
+    }
+
+    .hero-subtitle {
+      font-size: 1.5rem;
+      opacity: 0.9;
+      max-width: 800px;
+      margin: 0 auto;
+    }
+
+    /* Section Styles */
+    .section {
+      position: relative;
+      z-index: 1;
+      padding: 6rem 2rem;
+      max-width: 1400px;
+      margin: 0 auto;
+    }
+
+    .section-title {
+      font-size: 3rem;
+      font-weight: 800;
+      text-align: center;
+      margin-bottom: 4rem;
+      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+      -webkit-background-clip: text;
+      -webkit-text-fill-color: transparent;
+      background-clip: text;
+    }
+
+    /* Cards Grid */
+    .cards-grid {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
+      gap: 2rem;
+      margin-bottom: 2rem;
+    }
+
+    .card-content {
+      padding: 3rem 2rem;
+      text-align: center;
+      background: rgba(255, 255, 255, 0.05);
+      border-radius: 1rem;
+      backdrop-filter: blur(10px);
+    }
+
+    .card-content h3 {
+      font-size: 1.8rem;
+      margin-bottom: 1rem;
+      color: #fff;
+    }
+
+    .card-content p {
+      font-size: 1rem;
+      opacity: 0.8;
+      line-height: 1.6;
+    }
+
+    /* Text Effects */
+    .text-effects {
+      display: flex;
+      flex-direction: column;
+      gap: 2rem;
+      max-width: 800px;
+      margin: 0 auto;
+    }
+
+    .text-effect-item {
+      display: flex;
+      align-items: center;
+      justify-content: space-between;
+      padding: 2rem;
+      background: rgba(255, 255, 255, 0.03);
+      border-radius: 1rem;
+      border: 1px solid rgba(255, 255, 255, 0.1);
+    }
+
+    .text-effect-item label {
+      font-weight: 600;
+      font-size: 1.1rem;
+      opacity: 0.7;
+      min-width: 150px;
+    }
+
+    /* Canvas Grid */
+    .canvas-grid {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
+      gap: 2rem;
+    }
+
+    .canvas-box {
+      position: relative;
+      height: 300px;
+      border-radius: 1rem;
+      overflow: hidden;
+      border: 1px solid rgba(255, 255, 255, 0.1);
+      background: rgba(0, 0, 0, 0.5);
+    }
+
+    .canvas-label {
+      position: absolute;
+      bottom: 1rem;
+      left: 50%;
+      transform: translateX(-50%);
+      background: rgba(0, 0, 0, 0.8);
+      padding: 0.5rem 1.5rem;
+      border-radius: 2rem;
+      font-size: 0.9rem;
+      font-weight: 600;
+      z-index: 10;
+      backdrop-filter: blur(10px);
+    }
+
+    /* Generative Grid */
+    .generative-grid {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
+      gap: 2rem;
+    }
+
+    .generative-box {
+      position: relative;
+      height: 350px;
+      border-radius: 1rem;
+      overflow: hidden;
+      border: 1px solid rgba(255, 255, 255, 0.1);
+      background: rgba(0, 0, 0, 0.5);
+    }
+
+    /* Celebrations */
+    .celebrations-section {
+      position: relative;
+    }
+
+    .celebrations {
+      display: flex;
+      flex-wrap: wrap;
+      gap: 1.5rem;
+      justify-content: center;
+      align-items: center;
+      padding: 2rem;
+    }
+
+    .celebration-overlay {
+      position: fixed;
+      top: 0;
+      left: 0;
+      width: 100vw;
+      height: 100vh;
+      z-index: 100;
+    }
+
+    .celebration-btn {
+      padding: 1rem 2rem;
+      font-size: 1.1rem;
+      font-weight: 600;
+      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+      color: white;
+      border: none;
+      border-radius: 0.75rem;
+      cursor: pointer;
+      transition: all 0.3s ease;
+      box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
+    }
+
+    .celebration-btn:hover {
+      transform: translateY(-2px);
+      box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
+    }
+
+    /* Directives Grid */
+    .directives-grid {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
+      gap: 2rem;
+    }
+
+    .directive-card {
+      padding: 2.5rem 2rem;
+      background: rgba(255, 255, 255, 0.05);
+      border-radius: 1rem;
+      border: 1px solid rgba(255, 255, 255, 0.1);
+      text-align: center;
+      cursor: pointer;
+      transition: all 0.3s ease;
+    }
+
+    .directive-card h4 {
+      font-size: 1.3rem;
+      margin-bottom: 0.75rem;
+      color: #fff;
+    }
+
+    .directive-card p {
+      font-size: 0.95rem;
+      opacity: 0.7;
+      line-height: 1.5;
+    }
+
+    .directive-card:hover {
+      background: rgba(255, 255, 255, 0.08);
+      border-color: rgba(255, 255, 255, 0.2);
+    }
+
+    /* Patterns Grid */
+    .patterns-grid {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
+      gap: 2rem;
+    }
+
+    .pattern-box {
+      position: relative;
+      height: 300px;
+      border-radius: 1rem;
+      overflow: hidden;
+      border: 1px solid rgba(255, 255, 255, 0.1);
+      background: rgba(0, 0, 0, 0.5);
+    }
+
+    /* Status Grid */
+    .status-grid {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+      gap: 3rem;
+      padding: 2rem;
+    }
+
+    .status-item {
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+      gap: 1rem;
+      padding: 2rem;
+      background: rgba(255, 255, 255, 0.03);
+      border-radius: 1rem;
+      border: 1px solid rgba(255, 255, 255, 0.1);
+    }
+
+    .status-item span {
+      font-size: 1rem;
+      font-weight: 600;
+      opacity: 0.8;
+    }
+
+    /* Final Section */
+    .final-section {
+      min-height: 50vh;
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+      justify-content: center;
+    }
+
+    .ambient-note {
+      max-width: 700px;
+      text-align: center;
+      font-size: 1.2rem;
+      line-height: 1.8;
+      opacity: 0.8;
+      padding: 2rem;
+      background: rgba(255, 255, 255, 0.05);
+      border-radius: 1rem;
+      border: 1px solid rgba(255, 255, 255, 0.1);
+    }
+
+    /* Footer */
+    .footer {
+      text-align: center;
+      padding: 4rem 2rem;
+      font-size: 1.5rem;
+      position: relative;
+      z-index: 1;
+    }
+
+    /* Responsive Design */
+    @media (max-width: 768px) {
+      .hero-title {
+        font-size: 3rem;
+      }
+
+      .hero-subtitle {
+        font-size: 1.2rem;
+      }
+
+      .section-title {
+        font-size: 2rem;
+      }
+
+      .cards-grid,
+      .canvas-grid,
+      .generative-grid,
+      .directives-grid,
+      .patterns-grid {
+        grid-template-columns: 1fr;
+      }
+
+      .text-effect-item {
+        flex-direction: column;
+        gap: 1rem;
+        text-align: center;
+      }
+
+      .text-effect-item label {
+        min-width: auto;
+      }
+    }
+  `]
+})
+export class AppComponent {
+  triggerConfetti = false;
+  triggerFireworks = false;
+  triggerSparkle = false;
+  triggerEmoji = false;
+  triggerCheckmark = false;
+}

demo/src/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <title>Flair Elements UI Demo</title>
+  <base href="/">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="icon" type="image/x-icon" href="data:,">
+</head>
+<body>
+  <app-root></app-root>
+</body>
+</html>

demo/src/main.ts

@@ -0,0 +1,6 @@
+import { bootstrapApplication } from '@angular/platform-browser';
+import { AppComponent } from './app.component';
+
+bootstrapApplication(AppComponent, {
+  providers: []
+}).catch((err) => console.error(err));

demo/src/styles.scss

@@ -0,0 +1,32 @@
+@use '@sda/flair-elements-ui/src/styles' as flair;
+
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+body {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
+  background: #0a0a0f;
+  color: #ffffff;
+  overflow-x: hidden;
+}
+
+h1, h2, h3, h4, h5, h6 {
+  margin: 0;
+}
+
+a {
+  color: #0ea5e9;
+  text-decoration: none;
+
+  &:hover {
+    text-decoration: underline;
+  }
+}
+
+button {
+  cursor: pointer;
+  font-family: inherit;
+}

demo/tsconfig.app.json

@@ -0,0 +1,13 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./out-tsc/app",
+    "types": []
+  },
+  "files": [
+    "src/main.ts"
+  ],
+  "include": [
+    "src/**/*.d.ts"
+  ]
+}

demo/tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "compileOnSave": false,
+  "compilerOptions": {
+    "outDir": "./dist/out-tsc",
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "skipLibCheck": true,
+    "isolatedModules": true,
+    "esModuleInterop": true,
+    "sourceMap": true,
+    "declaration": false,
+    "experimentalDecorators": true,
+    "moduleResolution": "bundler",
+    "importHelpers": true,
+    "target": "ES2022",
+    "module": "ES2022",
+    "lib": [
+      "ES2022",
+      "dom"
+    ]
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  }
+}

src/components/fl-ambient-light/fl-ambient-light.component.scss

@@ -10,22 +10,18 @@
 .fl-ambient-light__layer-2,
 .fl-ambient-light__layer-3 {
   position: absolute;
-  inset: 0;
+  inset: -20%;
   pointer-events: none;
-  will-change: background;
 }
 
 .fl-ambient-light__layer-1 {
   opacity: 0.5;
-  filter: blur(60px);
 }
 
 .fl-ambient-light__layer-2 {
   opacity: 0.4;
-  filter: blur(80px);
 }
 
 .fl-ambient-light__layer-3 {
   opacity: 0.3;
-  filter: blur(100px);
 }

src/components/fl-ambient-light/fl-ambient-light.component.ts

@@ -48,7 +48,7 @@ export class FlAmbientLightComponent {
       }
 
       const id = `ambient-light-${Math.random().toString(36).slice(2)}`;
-      this.loopCleanup = this.animationLoop.register(id, (delta) => this.tick(delta));
+      this.loopCleanup = this.animationLoop.registerWithElement(id, this.el.nativeElement, (delta) => this.tick(delta));
     });
 
     this.destroyRef.onDestroy(() => {

src/components/fl-aurora/fl-aurora.component.ts

@@ -82,7 +82,7 @@ export class FlAuroraComponent {
       this.renderStaticState();
     } else {
       const id = `aurora-${Math.random().toString(36).slice(2)}`;
-      this.loopCleanup = this.animationLoop.register(id, (_, elapsed) => this.tick(elapsed));
+      this.loopCleanup = this.animationLoop.registerWithElement(id, svg, (_, elapsed) => this.tick(elapsed));
     }
 
     this.ready.emit();

src/components/fl-confetti/fl-confetti.component.ts

@@ -59,15 +59,15 @@ export class FlConfettiComponent {
       this.resizeCanvas();
 
       window.addEventListener('resize', () => this.resizeCanvas());
-    });
 
-    // Watch for active changes
+      // Watch for active changes (must be after canvas is ready)
       effect(() => {
         const isActive = this.active();
         if (isActive && !this.isAnimating) {
           this.trigger();
         }
       });
+    });
 
     this.destroyRef.onDestroy(() => {
       this.loopCleanup?.();

src/components/fl-counter-rollup/fl-counter-rollup.component.ts

@@ -1,6 +1,6 @@
 import {
   Component, ChangeDetectionStrategy, input, inject,
-  afterNextRender, DestroyRef, signal, effect,
+  ElementRef, afterNextRender, DestroyRef, signal, effect,
 } from '@angular/core';
 import { ReducedMotionService } from '../../services/reduced-motion.service';
 
@@ -13,6 +13,7 @@ import { ReducedMotionService } from '../../services/reduced-motion.service';
   host: { 'class': 'fl-counter-rollup' },
 })
 export class FlCounterRollupComponent {
+  private el = inject(ElementRef);
   private reducedMotion = inject(ReducedMotionService);
   private destroyRef = inject(DestroyRef);
 
@@ -32,24 +33,48 @@ export class FlCounterRollupComponent {
   private targetValue = 0;
   private startTime = 0;
   private animationFrame: number | null = null;
+  private observer: IntersectionObserver | null = null;
+  private hasAnimated = false;
 
   constructor() {
     afterNextRender(() => {
+      if (this.reducedMotion.reduced()) {
+        this.targetValue = this.value();
+        this.currentValue = this.targetValue;
+        this.formattedValue.set(this.formatNumber(this.targetValue));
+        return;
+      }
+
+      this.targetValue = this.value();
+      this.observer = new IntersectionObserver(
+        (entries) => {
+          if (entries[0]?.isIntersecting && !this.hasAnimated) {
+            this.observer?.disconnect();
+            this.observer = null;
+            this.hasAnimated = true;
             this.startAnimation();
+          }
+        },
+        { threshold: 0.1 }
+      );
+      this.observer.observe(this.el.nativeElement);
     });
 
     effect(() => {
-      // React to value changes
+      // React to value changes after initial animation
       const newValue = this.value();
       this.startValue = this.currentValue;
       this.targetValue = newValue;
+      if (this.hasAnimated) {
         this.startAnimation();
+      }
     });
 
     this.destroyRef.onDestroy(() => {
       if (this.animationFrame !== null) {
         cancelAnimationFrame(this.animationFrame);
       }
+      this.observer?.disconnect();
     });
   }
 

src/components/fl-fireworks/fl-fireworks.component.ts

@@ -66,15 +66,15 @@ export class FlFireworksComponent {
       this.resizeCanvas();
 
       window.addEventListener('resize', () => this.resizeCanvas());
-    });
 
-    // Watch for active changes
+      // Watch for active changes (must be after canvas is ready)
       effect(() => {
         const isActive = this.active();
         if (isActive && !this.isAnimating) {
           this.trigger();
         }
       });
+    });
 
     this.destroyRef.onDestroy(() => {
       this.loopCleanup?.();

src/components/fl-floating-layers/fl-floating-layers.component.ts

@@ -37,7 +37,7 @@ export class FlFloatingLayersComponent {
       if (this.reducedMotion.reduced()) return;
       this.cursorCleanup = this.cursorTracker.subscribe();
       const id = `floating-layers-${Math.random().toString(36).slice(2)}`;
-      this.loopCleanup = this.animationLoop.register(id, () => this.tick());
+      this.loopCleanup = this.animationLoop.registerWithElement(id, this.el.nativeElement, () => this.tick());
     });
 
     this.destroyRef.onDestroy(() => {

src/components/fl-flow-field/fl-flow-field.component.ts

@@ -91,7 +91,7 @@ export class FlFlowFieldComponent {
     this.ctx.fillRect(0, 0, this.width, this.height);
 
     const id = `flow-field-${Math.random().toString(36).slice(2)}`;
-    this.loopCleanup = this.animationLoop.register(id, (delta) => this.tick(delta));
+    this.loopCleanup = this.animationLoop.registerWithElement(id, canvas, (delta) => this.tick(delta));
     this.ready.emit();
   }
 

src/components/fl-fractal-landscape/fl-fractal-landscape.component.ts

@@ -76,7 +76,7 @@ export class FlFractalLandscapeComponent {
       this.renderFrame(0);
     } else {
       const id = `fractal-${Math.random().toString(36).slice(2)}`;
-      this.loopCleanup = this.animationLoop.register(id, (_, elapsed) => this.renderFrame(elapsed));
+      this.loopCleanup = this.animationLoop.registerWithElement(id, canvas, (_, elapsed) => this.renderFrame(elapsed));
     }
 
     this.ready.emit();

src/components/fl-gradient-mesh/fl-gradient-mesh.component.ts

@@ -62,7 +62,7 @@ export class FlGradientMeshComponent {
       }
 
       const id = `gradient-mesh-${Math.random().toString(36).slice(2)}`;
-      this.loopCleanup = this.animationLoop.register(id, (delta) => this.tick(delta));
+      this.loopCleanup = this.animationLoop.registerWithElement(id, this.el.nativeElement, (delta) => this.tick(delta));
     });
 
     this.destroyRef.onDestroy(() => {

src/components/fl-matrix-rain/fl-matrix-rain.component.ts

@@ -81,7 +81,7 @@ export class FlMatrixRainComponent {
     this.initColumns();
 
     const id = `matrix-rain-${Math.random().toString(36).slice(2)}`;
-    this.loopCleanup = this.animationLoop.register(id, (delta) => this.tick(delta));
+    this.loopCleanup = this.animationLoop.registerWithElement(id, canvas, (delta) => this.tick(delta));
     this.ready.emit();
   }
 

src/components/fl-particle-field/fl-particle-field.component.ts

@@ -108,7 +108,7 @@ export class FlParticleFieldComponent {
     }
 
     const id = `particle-field-${Math.random().toString(36).slice(2)}`;
-    this.loopCleanup = this.animationLoop.register(id, (delta) => this.tick(delta));
+    this.loopCleanup = this.animationLoop.registerWithElement(id, canvas, (delta) => this.tick(delta));
     this.ready.emit();
   }
 
@@ -192,21 +192,68 @@ export class FlParticleFieldComponent {
       if (p.y > h + p.size) p.y = -p.size;
     }
 
-    // Draw connections
+    // Draw connections using spatial grid
     if (useConnections) {
+      const cellSize = connDist;
+      const gridCols = Math.ceil(w / cellSize) + 1;
+      const gridRows = Math.ceil(h / cellSize) + 1;
+      const grid = new Array(gridCols * gridRows);
+      for (let i = 0; i < grid.length; i++) grid[i] = [];
+
+      // Assign particles to grid cells
       for (let i = 0; i < this.particles.length; i++) {
-        for (let j = i + 1; j < this.particles.length; j++) {
+        const p = this.particles[i];
+        const col = Math.floor(p.x / cellSize);
+        const row = Math.floor(p.y / cellSize);
+        if (col >= 0 && col < gridCols && row >= 0 && row < gridRows) {
+          grid[col * gridRows + row].push(i);
+        }
+      }
+
+      const maxConnsPerParticle = 5;
+      const connCounts = new Uint8Array(this.particles.length);
+      const drawn = new Set<string>();
+
+      ctx.lineWidth = 0.5;
+
+      for (let col = 0; col < gridCols; col++) {
+        for (let row = 0; row < gridRows; row++) {
+          const cell = grid[col * gridRows + row];
+          if (cell.length === 0) continue;
+
+          // Check this cell and neighboring cells
+          for (let dc = -1; dc <= 1; dc++) {
+            for (let dr = -1; dr <= 1; dr++) {
+              const nc = col + dc;
+              const nr = row + dr;
+              if (nc < 0 || nc >= gridCols || nr < 0 || nr >= gridRows) continue;
+              const neighbor = grid[nc * gridRows + nr];
+
+              for (const i of cell) {
+                if (connCounts[i] >= maxConnsPerParticle) continue;
                 const a = this.particles[i];
+
+                for (const j of neighbor) {
+                  if (j <= i) continue; // avoid duplicates
+                  if (connCounts[j] >= maxConnsPerParticle) continue;
+
                   const b = this.particles[j];
-          const d = distance2D(a.x, a.y, b.x, b.y);
+                  const dx = a.x - b.x;
+                  const dy = a.y - b.y;
+                  const d = Math.sqrt(dx * dx + dy * dy);
                   if (d < connDist) {
                     const alpha = (1 - d / connDist) * connOpacity;
                     ctx.strokeStyle = `rgba(255, 255, 255, ${alpha})`;
-            ctx.lineWidth = 0.5;
                     ctx.beginPath();
                     ctx.moveTo(a.x, a.y);
                     ctx.lineTo(b.x, b.y);
                     ctx.stroke();
+                    connCounts[i]++;
+                    connCounts[j]++;
+                  }
+                }
+              }
+            }
           }
         }
       }

src/components/fl-scramble-reveal/fl-scramble-reveal.component.ts

@@ -1,6 +1,6 @@
 import {
   Component, ChangeDetectionStrategy, input, inject,
-  afterNextRender, DestroyRef, signal,
+  ElementRef, afterNextRender, DestroyRef, signal,
 } from '@angular/core';
 import { ReducedMotionService } from '../../services/reduced-motion.service';
 
@@ -13,6 +13,7 @@ import { ReducedMotionService } from '../../services/reduced-motion.service';
   host: { 'class': 'fl-scramble-reveal' },
 })
 export class FlScrambleRevealComponent {
+  private el = inject(ElementRef);
   private reducedMotion = inject(ReducedMotionService);
   private destroyRef = inject(DestroyRef);
 
@@ -28,6 +29,7 @@ export class FlScrambleRevealComponent {
   private scrambleCount = 0;
   private maxScrambles = 3;
   private interval: any = null;
+  private observer: IntersectionObserver | null = null;
 
   constructor() {
     afterNextRender(() => {
@@ -36,13 +38,24 @@ export class FlScrambleRevealComponent {
         return;
       }
 
+      this.observer = new IntersectionObserver(
+        (entries) => {
+          if (entries[0]?.isIntersecting) {
+            this.observer?.disconnect();
+            this.observer = null;
             this.startScramble();
+          }
+        },
+        { threshold: 0.1 }
+      );
+      this.observer.observe(this.el.nativeElement);
     });
 
     this.destroyRef.onDestroy(() => {
       if (this.interval) {
         clearInterval(this.interval);
       }
+      this.observer?.disconnect();
     });
   }
 

src/components/fl-typewriter/fl-typewriter.component.ts

@@ -1,6 +1,6 @@
 import {
   Component, ChangeDetectionStrategy, input, inject,
-  afterNextRender, DestroyRef, signal,
+  ElementRef, afterNextRender, DestroyRef, signal,
 } from '@angular/core';
 import { ReducedMotionService } from '../../services/reduced-motion.service';
 
@@ -18,6 +18,7 @@ import { ReducedMotionService } from '../../services/reduced-motion.service';
   host: { 'class': 'fl-typewriter' },
 })
 export class FlTypewriterComponent {
+  private el = inject(ElementRef);
   private reducedMotion = inject(ReducedMotionService);
   private destroyRef = inject(DestroyRef);
 
@@ -37,6 +38,7 @@ export class FlTypewriterComponent {
   private typingInterval: any = null;
   private cursorInterval: any = null;
   private isTyping = false;
+  private observer: IntersectionObserver | null = null;
 
   constructor() {
     afterNextRender(() => {
@@ -45,12 +47,23 @@ export class FlTypewriterComponent {
         return;
       }
 
+      this.observer = new IntersectionObserver(
+        (entries) => {
+          if (entries[0]?.isIntersecting) {
+            this.observer?.disconnect();
+            this.observer = null;
             setTimeout(() => this.startTyping(), this.delay());
             this.startCursorBlink();
+          }
+        },
+        { threshold: 0.1 }
+      );
+      this.observer.observe(this.el.nativeElement);
     });
 
     this.destroyRef.onDestroy(() => {
       this.cleanup();
+      this.observer?.disconnect();
     });
   }
 

src/components/fl-voronoi-mesh/fl-voronoi-mesh.component.ts

@@ -52,6 +52,9 @@ export class FlVoronoiMeshComponent {
   private pixelRatio = 1;
   private loopCleanup: (() => void) | null = null;
   private resizeObserver: ResizeObserver | null = null;
+  private cellCache: Uint8Array | null = null;
+  private lastSeedPositions: { x: number; y: number }[] = [];
+  private cacheStep = 4;
 
   constructor() {
     afterNextRender(() => {
@@ -87,7 +90,7 @@ export class FlVoronoiMeshComponent {
     this.createSeeds();
 
     const id = `voronoi-${Math.random().toString(36).slice(2)}`;
-    this.loopCleanup = this.animationLoop.register(id, (delta) => this.tick(delta));
+    this.loopCleanup = this.animationLoop.registerWithElement(id, canvas, (delta) => this.tick(delta));
     this.ready.emit();
   }
 
@@ -106,6 +109,7 @@ export class FlVoronoiMeshComponent {
   }
 
   private createSeeds(): void {
+    this.cellCache = null;
     const count = this.seedCount();
     const cols = this.colors();
     const spd = this.speed();
@@ -121,6 +125,17 @@ export class FlVoronoiMeshComponent {
     }
   }
 
+  private needsCacheInvalidation(): boolean {
+    if (!this.cellCache || this.lastSeedPositions.length !== this.seeds.length) return true;
+    const step = Math.max(4, Math.floor(6 / this.pixelRatio));
+    for (let i = 0; i < this.seeds.length; i++) {
+      const dx = this.seeds[i].x - this.lastSeedPositions[i].x;
+      const dy = this.seeds[i].y - this.lastSeedPositions[i].y;
+      if (dx * dx + dy * dy > step * step) return true;
+    }
+    return false;
+  }
+
   private tick(delta: number): void {
     if (!this.ctx) return;
 
@@ -145,55 +160,65 @@ export class FlVoronoiMeshComponent {
     const ctx = this.ctx;
     const w = this.width;
     const h = this.height;
-
+    const step = Math.max(4, Math.floor(6 / this.pixelRatio));
-    // Use pixel-based approach for Voronoi (brute-force nearest-seed)
-    // For performance, use a step size
-    const step = Math.max(2, Math.floor(4 / this.pixelRatio));
 
     ctx.clearRect(0, 0, w, h);
 
-    for (let x = 0; x < w; x += step) {
+    const cols = Math.ceil(w / step);
-      for (let y = 0; y < h; y += step) {
+    const rows = Math.ceil(h / step);
-        let minDist = Infinity;
+    const totalCells = cols * rows;
-        let nearestColor = this.seeds[0]?.color ?? '#000';
 
-        for (const s of this.seeds) {
+    // Only recalculate cell assignments if seeds moved significantly
-          const d = (x - s.x) * (x - s.x) + (y - s.y) * (y - s.y);
+    if (this.needsCacheInvalidation()) {
+      this.cellCache = new Uint8Array(totalCells);
+      this.cacheStep = step;
+
+      for (let col = 0; col < cols; col++) {
+        const x = col * step;
+        for (let row = 0; row < rows; row++) {
+          const y = row * step;
+          let minDist = Infinity;
+          let nearestIdx = 0;
+
+          for (let s = 0; s < this.seeds.length; s++) {
+            const dx = x - this.seeds[s].x;
+            const dy = y - this.seeds[s].y;
+            const d = dx * dx + dy * dy;
             if (d < minDist) {
               minDist = d;
-            nearestColor = s.color;
+              nearestIdx = s;
             }
           }
 
-        ctx.fillStyle = nearestColor;
+          this.cellCache[col * rows + row] = nearestIdx;
+        }
+      }
+
+      this.lastSeedPositions = this.seeds.map(s => ({ x: s.x, y: s.y }));
+    }
+
+    // Render from cache
+    const cache = this.cellCache!;
+    for (let col = 0; col < cols; col++) {
+      const x = col * step;
+      for (let row = 0; row < rows; row++) {
+        const y = row * step;
+        const seedIdx = cache[col * rows + row];
+        ctx.fillStyle = this.seeds[seedIdx]?.color ?? '#000';
         ctx.fillRect(x, y, step, step);
       }
     }
 
-    // Draw edges using second-nearest distance comparison
+    // Draw edges only when showEdges is true
     if (this.showEdges()) {
-      ctx.strokeStyle = this.edgeColor();
+      const edgeColor = this.edgeColor();
-      ctx.lineWidth = this.edgeWidth();
+      for (let col = 1; col < cols; col++) {
-
+        for (let row = 1; row < rows; row++) {
-      for (let x = 0; x < w; x += step) {
+          const idx = cache[col * rows + row];
-        for (let y = 0; y < h; y += step) {
+          // Check if neighboring cells have different seed assignments
-          let min1 = Infinity;
+          if (idx !== cache[(col - 1) * rows + row] || idx !== cache[col * rows + (row - 1)]) {
-          let min2 = Infinity;
+            ctx.fillStyle = edgeColor;
-
+            ctx.fillRect(col * step, row * step, step, step);
-          for (const s of this.seeds) {
-            const d = (x - s.x) * (x - s.x) + (y - s.y) * (y - s.y);
-            if (d < min1) {
-              min2 = min1;
-              min1 = d;
-            } else if (d < min2) {
-              min2 = d;
-            }
-          }
-
-          const ratio = min1 / min2;
-          if (ratio > 0.95) {
-            ctx.fillStyle = this.edgeColor();
-            ctx.fillRect(x, y, step, step);
           }
         }
       }

src/services/animation-loop.service.ts

@@ -16,6 +16,10 @@ export class AnimationLoopService {
   private startTime = 0;
   private running = false;
 
+  /** Track which registered IDs are currently visible */
+  private visibilityMap = new Map<string, boolean>();
+  private observers = new Map<string, IntersectionObserver>();
+
   constructor() {
     this.destroyRef.onDestroy(() => {
       this.stop();
@@ -42,6 +46,37 @@ export class AnimationLoopService {
     }
   }
 
+  /** Register a callback tied to an element's visibility. Auto-pauses when off-screen. */
+  registerWithElement(id: string, element: Element, callback: (delta: number, elapsed: number) => void, priority = 0): () => void {
+    this.visibilityMap.set(id, false);
+
+    const observer = new IntersectionObserver(
+      (entries) => {
+        for (const entry of entries) {
+          this.visibilityMap.set(id, entry.isIntersecting);
+        }
+      },
+      { threshold: 0 }
+    );
+    observer.observe(element);
+    this.observers.set(id, observer);
+
+    const wrappedCallback = (delta: number, elapsed: number): void => {
+      if (this.visibilityMap.get(id)) {
+        callback(delta, elapsed);
+      }
+    };
+
+    const baseCleanup = this.register(id, wrappedCallback, priority);
+
+    return () => {
+      baseCleanup();
+      observer.disconnect();
+      this.observers.delete(id);
+      this.visibilityMap.delete(id);
+    };
+  }
+
   private start(): void {
     if (this.running) return;
     if (this.reducedMotion.reduced()) return;

src/styles/_mixins.scss

@@ -114,5 +114,5 @@
 
 @keyframes fl-float {
   0%, 100% { transform: translateY(0); }
-  50% { transform: translateY(-#{$distance}); }
+  50% { transform: translateY(-10px); }
 }