Card Stack Cascade

Stacked cards fan out and rearrange into a grid as you scroll, driven by GSAP ScrollTrigger scrub.

gsapscrolltriggerperspective

Targets: JS HTML

Code

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #070a12;
  --text: #f0f4fb;
  --muted: #8a95a8;
  --accent: #86e8ff;
  --neon-purple: #ae52ff;
}

html { background: var(--bg); color: var(--text); font-family: 'Inter', 'SF Pro Display', system-ui, sans-serif; }
body { overflow-x: hidden; }

.intro {
  min-height: 70vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 2rem;
}

.eyebrow { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.18em; color: var(--accent); margin-bottom: 1rem; }

h1 {
  font-size: clamp(2.2rem, 6vw, 4rem); font-weight: 700; letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff, var(--accent), var(--neon-purple));
  background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.subtitle { font-size: clamp(0.9rem, 2vw, 1.05rem); color: var(--muted); max-width: 460px; margin-top: 0.75rem; line-height: 1.6; }

/* Stack section */
.stack-section { position: relative; min-height: 250vh; }

.perspective-container {
  position: sticky; top: 0; height: 100vh;
  display: flex; align-items: center; justify-content: center;
  perspective: 1200px;
}

.card-stack {
  position: relative;
  width: 380px; height: 460px;
}

/* Cards */
.stack-card {
  position: absolute; inset: 0;
  will-change: transform, opacity;
}

.card-glass {
  width: 100%; height: 100%;
  background: linear-gradient(135deg,
    hsla(var(--hue,200), 30%, 15%, 0.6),
    hsla(var(--hue,200), 20%, 10%, 0.8)
  );
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid hsla(var(--hue,200), 40%, 40%, 0.2);
  border-radius: 20px;
  padding: 2.5rem;
  display: flex; flex-direction: column; justify-content: center;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), inset 0 1px 0 hsla(var(--hue,200), 50%, 70%, 0.08);
}

.card-num {
  font-size: 3rem; font-weight: 700; line-height: 1; margin-bottom: 1rem;
  color: hsla(var(--hue,200), 60%, 60%, 0.2);
}

.card-glass h3 {
  font-size: 1.3rem; font-weight: 600; margin-bottom: 0.6rem;
  color: hsl(var(--hue,200) 70% 80%);
}

.card-glass p { font-size: 0.88rem; color: var(--muted); line-height: 1.55; margin-bottom: 1.2rem; }

.card-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.card-tags span {
  padding: 0.18rem 0.55rem; border-radius: 4px;
  font-size: 0.65rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
  background: hsla(var(--hue,200), 40%, 30%, 0.25);
  color: hsl(var(--hue,200) 60% 70%);
}

/* Outro */
.outro {
  min-height: 50vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; padding: 2rem;
}

.outro h2 { font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 1.5rem; }

.btn-back {
  display: inline-block; padding: 0.7rem 2rem; border-radius: 999px;
  border: 1px solid rgba(134,232,255,0.3); color: var(--accent); text-decoration: none;
  font: 600 0.85rem/1 'Inter', system-ui, sans-serif; transition: all 0.25s ease;
}
.btn-back:hover { background: rgba(134,232,255,0.08); border-color: var(--accent); }

/* Reduced motion */
.reduced-motion .stack-card { opacity: 1 !important; transform: none !important; }

@media (max-width: 640px) {
  .card-stack { width: 300px; height: 400px; }
  .card-glass { padding: 1.8rem; }
}

if (!window.MotionPreference) {
  const __mql = window.matchMedia("(prefers-reduced-motion: reduce)");
  const __listeners = new Set();

  const MotionPreference = {
    prefersReducedMotion() {
      return __mql.matches;
    },
    setOverride(value) {
      const reduced = Boolean(value);
      document.documentElement.classList.toggle("reduced-motion", reduced);
      window.dispatchEvent(new CustomEvent("motion-preference", { detail: { reduced } }));
      for (const listener of __listeners) {
        try {
          listener({ reduced, override: reduced, systemReduced: __mql.matches });
        } catch {}
      }
    },
    onChange(listener) {
      __listeners.add(listener);
      try {
        listener({
          reduced: __mql.matches,
          override: null,
          systemReduced: __mql.matches,
        });
      } catch {}
      return () => __listeners.delete(listener);
    },
    getState() {
      return { reduced: __mql.matches, override: null, systemReduced: __mql.matches };
    },
  };

  window.MotionPreference = MotionPreference;
}

function prefersReducedMotion() {
  return window.MotionPreference.prefersReducedMotion();
}

function initDemoShell() {
  // No-op shim in imported standalone snippets.
}

import gsap from 'gsap';
import { ScrollTrigger } from 'gsap/ScrollTrigger';
import Lenis from 'lenis';

gsap.registerPlugin(ScrollTrigger);

initDemoShell({ title: 'Card Stack Cascade', category: 'scroll', tech: ['gsap', 'scrolltrigger', '3d-transforms'] });

const lenis = new Lenis({ lerp: 0.1, smoothWheel: true });
lenis.on('scroll', ScrollTrigger.update);
gsap.ticker.add((time) => lenis.raf(time * 1000));
gsap.ticker.lagSmoothing(0);

const reduced = prefersReducedMotion();
if (reduced) document.documentElement.classList.add('reduced-motion');

window.addEventListener('motion-preference', (e) => {
  document.documentElement.classList.toggle('reduced-motion', e.detail.reduced);
  ScrollTrigger.refresh();
});

const cards = gsap.utils.toArray('.stack-card');
const total = cards.length;

// Initial stacked position: all centered, slight y offsets, increasing scale-down
cards.forEach((card, i) => {
  gsap.set(card, {
    y: i * -8,
    scale: 1 - (total - 1 - i) * 0.04,
    rotateX: 0,
    zIndex: i,
    opacity: i === total - 1 ? 1 : 0.6,
  });
});

if (!reduced) {
  const tl = gsap.timeline({
    scrollTrigger: {
      trigger: '.stack-section',
      start: 'top top',
      end: 'bottom bottom',
      scrub: 1,
    },
  });

  // Fan out: each card moves to its final position
  cards.forEach((card, i) => {
    const angle = (i - (total - 1) / 2) * 8; // spread angle
    const xOff = (i - (total - 1) / 2) * 120;  // horizontal spread
    const yOff = Math.abs(i - (total - 1) / 2) * 30; // arc shape
    const rot = (i - (total - 1) / 2) * 4; // slight rotation

    tl.to(card, {
      x: xOff,
      y: yOff,
      rotateY: angle,
      rotateZ: rot,
      scale: 1,
      opacity: 1,
      zIndex: i,
      duration: 1,
      ease: 'none',
    }, 0);
  });

  // Second phase: cards settle into a grid-like arrangement
  cards.forEach((card, i) => {
    const col = i % 3;
    const row = Math.floor(i / 3);
    const gridX = (col - 1) * 200;
    const gridY = row * 240 - 120;

    tl.to(card, {
      x: gridX,
      y: gridY,
      rotateY: 0,
      rotateZ: 0,
      rotateX: 0,
      scale: 0.85,
      duration: 1,
      ease: 'none',
    }, 1);
  });
}

// Intro animations
if (!reduced) {
  gsap.set('.intro .eyebrow', { opacity: 0, y: 20 });
  gsap.set('.intro h1', { opacity: 0, y: 40 });
  gsap.set('.intro .subtitle', { opacity: 0, y: 25 });

  gsap.timeline({ defaults: { ease: 'expo.out' } })
    .to('.intro .eyebrow', { opacity: 1, y: 0, duration: 0.7, delay: 0.3 })
    .to('.intro h1', { opacity: 1, y: 0, duration: 0.9 }, '-=0.4')
    .to('.intro .subtitle', { opacity: 1, y: 0, duration: 0.7 }, '-=0.5');
}

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Card Stack Cascade — stealthisdesign</title>
  <link rel="stylesheet" href="style.css">
    <script type="importmap">{"imports":{"gsap":"/vendor/gsap/index.js","gsap/ScrollTrigger":"/vendor/gsap/ScrollTrigger.js","gsap/SplitText":"/vendor/gsap/SplitText.js","gsap/Flip":"/vendor/gsap/Flip.js","gsap/ScrambleTextPlugin":"/vendor/gsap/ScrambleTextPlugin.js","gsap/TextPlugin":"/vendor/gsap/TextPlugin.js","gsap/all":"/vendor/gsap/all.js","gsap/":"/vendor/gsap/","lenis":"/vendor/lenis/dist/lenis.mjs","three":"/vendor/three/build/three.module.js","three/addons/":"/vendor/three/examples/jsm/"}}</script>
  <style>html.lenis,
html.lenis body {
  height: auto;
}

.lenis:not(.lenis-autoToggle).lenis-stopped {
  overflow: clip;
}

.lenis [data-lenis-prevent],
.lenis [data-lenis-prevent-wheel],
.lenis [data-lenis-prevent-touch] {
  overscroll-behavior: contain;
}

.lenis.lenis-smooth iframe {
  pointer-events: none;
}

.lenis.lenis-autoToggle {
  transition-property: overflow;
  transition-duration: 1ms;
  transition-behavior: allow-discrete;
}</style>
</head>
<body>
  <section class="intro">
    <span class="eyebrow">Demo 05</span>
    <h1>Card Stack Cascade</h1>
    <p class="subtitle">Cards start stacked and fan out with 3D transforms as you scroll. Glassmorphism panels with perspective depth.</p>
  </section>

  <section class="stack-section">
    <div class="perspective-container">
      <div class="card-stack" id="card-stack">
        <div class="stack-card" data-index="0" style="--hue: 200;">
          <div class="card-glass">
            <span class="card-num">01</span>
            <h3>Scroll Animations</h3>
            <p>Choreograph complex timelines driven by scroll position with GSAP ScrollTrigger.</p>
            <div class="card-tags"><span>gsap</span><span>scrolltrigger</span></div>
          </div>
        </div>
        <div class="stack-card" data-index="1" style="--hue: 260;">
          <div class="card-glass">
            <span class="card-num">02</span>
            <h3>3D WebGL Scenes</h3>
            <p>Build immersive particle tunnels, shader backgrounds, and product showcases with Three.js.</p>
            <div class="card-tags"><span>three.js</span><span>webgl</span></div>
          </div>
        </div>
        <div class="stack-card" data-index="2" style="--hue: 320;">
          <div class="card-glass">
            <span class="card-num">03</span>
            <h3>View Transitions</h3>
            <p>Seamless page transitions with shared-element morphing using the View Transitions API.</p>
            <div class="card-tags"><span>view-transitions</span><span>css</span></div>
          </div>
        </div>
        <div class="stack-card" data-index="3" style="--hue: 40;">
          <div class="card-glass">
            <span class="card-num">04</span>
            <h3>Canvas Effects</h3>
            <p>Bokeh particles, spotlights, noise overlays, and magnetic cursors with Canvas 2D.</p>
            <div class="card-tags"><span>canvas</span><span>vanilla-js</span></div>
          </div>
        </div>
        <div class="stack-card" data-index="4" style="--hue: 160;">
          <div class="card-glass">
            <span class="card-num">05</span>
            <h3>Motion Design</h3>
            <p>Shared tokens, easing systems, and accessibility-first motion primitives.</p>
            <div class="card-tags"><span>design-system</span><span>a11y</span></div>
          </div>
        </div>
      </div>
    </div>
  </section>

  <section class="outro">
    <h2>Stack complete.</h2>
    <a href="/" class="btn-back">Back to Showcase</a>
  </section>

  <script type="module" src="script.js"></script>
</body>
</html>

Card Stack Cascade

Stacked cards fan out and rearrange into a grid as you scroll, driven by GSAP ScrollTrigger scrub.

Source

Repository: libs-genclaude
Original demo id: 05-card-stack

Notes

Stacked cards fan out and rearrange into a grid as you scroll, driven by GSAP ScrollTrigger scrub.