Stack Cards

Code

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

body {
  font-family: Inter, system-ui, sans-serif;
  background: #050910;
  color: #f2f6ff;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.demo {
  width: 100%;
  max-width: 640px;
}
.demo-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.375rem;
}
.demo-sub {
  color: #475569;
  font-size: 0.875rem;
  margin-bottom: 2.5rem;
}

.section {
  margin-bottom: 3rem;
}
.section-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #475569;
  margin-bottom: 1.25rem;
}

/* ── Stack wrapper ── */
.stack {
  position: relative;
  width: 260px;
  height: 160px;
  cursor: pointer;
  outline: none;
}

/* ── Card base ── */
.stack__card {
  position: absolute;
  inset: 0;
  border-radius: 14px;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.35s ease;
  will-change: transform;
}

/* ── Default stacked offsets (back → front = first → last child) ── */
.stack__card:nth-child(4) {
  transform: translateY(-18px) scale(0.88);
  z-index: 1;
}
.stack__card:nth-child(3) {
  transform: translateY(-10px) scale(0.93);
  z-index: 2;
}
.stack__card:nth-child(2) {
  transform: translateY(-4px) scale(0.97);
  z-index: 3;
}
.stack__card:nth-child(1) {
  transform: translateY(0) scale(1);
  z-index: 4;
}

/* ── Hover fan-out ── */
.stack:hover .stack__card:nth-child(4) {
  transform: rotate(-18deg) translateX(-90px) translateY(-8px);
}
.stack:hover .stack__card:nth-child(3) {
  transform: rotate(-7deg) translateX(-32px) translateY(-4px);
}
.stack:hover .stack__card:nth-child(2) {
  transform: rotate(5deg) translateX(18px) translateY(-2px);
}
.stack:hover .stack__card:nth-child(1) {
  transform: rotate(16deg) translateX(72px) translateY(2px);
}

/* ── Cycle animation ── */
.stack__card.cycling {
  animation: cycle-out 0.4s cubic-bezier(0.55, 0, 1, 0.45) forwards;
  z-index: 10;
}
@keyframes cycle-out {
  0% {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
  40% {
    transform: translateY(-40px) scale(1.04);
    opacity: 1;
  }
  100% {
    transform: translateY(20px) scale(0.87);
    opacity: 0;
  }
}

/* ── Color deck card colors ── */
.stack__card--1 {
  background: linear-gradient(135deg, #1e40af, #3b82f6);
}
.stack__card--2 {
  background: linear-gradient(135deg, #065f46, #10b981);
}
.stack__card--3 {
  background: linear-gradient(135deg, #7c2d12, #f97316);
}
.stack__card--4 {
  background: linear-gradient(135deg, #4c1d95, #8b5cf6);
}

/* ── Glass deck override ── */
.stack--glass .stack__card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

/* ── Card inner ── */
.card-inner {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1rem 1.25rem;
}

.card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.card-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 0.15rem;
}

.card-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Stack Cards</title>
  <link rel="stylesheet" href="style.css" />
</head>
<body>
  <div class="demo">
    <h1 class="demo-title">Stack Cards</h1>
    <p class="demo-sub">Hover to fan out · click to cycle through the deck.</p>

    <!-- Stack A — colored cards -->
    <section class="section">
      <p class="section-label">Color deck</p>
      <div class="stack" role="group" aria-label="Card stack, click to cycle" tabindex="0">
        <div class="stack__card stack__card--1">
          <div class="card-inner">
            <p class="card-label">Design</p>
            <p class="card-value">Figma components</p>
          </div>
        </div>
        <div class="stack__card stack__card--2">
          <div class="card-inner">
            <p class="card-label">Frontend</p>
            <p class="card-value">Astro + Tailwind</p>
          </div>
        </div>
        <div class="stack__card stack__card--3">
          <div class="card-inner">
            <p class="card-label">Backend</p>
            <p class="card-value">Hono + Workers</p>
          </div>
        </div>
        <div class="stack__card stack__card--4">
          <div class="card-inner">
            <p class="card-label">Deploy</p>
            <p class="card-value">Cloudflare Pages</p>
          </div>
        </div>
      </div>
    </section>

    <!-- Stack B — dark glassmorphism cards -->
    <section class="section">
      <p class="section-label">Glass deck</p>
      <div class="stack stack--glass" role="group" aria-label="Glass card stack, click to cycle" tabindex="0">
        <div class="stack__card stack__card--1">
          <div class="card-inner">
            <span class="card-icon">🚀</span>
            <p class="card-label">Launch</p>
          </div>
        </div>
        <div class="stack__card stack__card--2">
          <div class="card-inner">
            <span class="card-icon">✦</span>
            <p class="card-label">Iterate</p>
          </div>
        </div>
        <div class="stack__card stack__card--3">
          <div class="card-inner">
            <span class="card-icon">📈</span>
            <p class="card-label">Scale</p>
          </div>
        </div>
        <div class="stack__card stack__card--4">
          <div class="card-inner">
            <span class="card-icon">💎</span>
            <p class="card-label">Ship</p>
          </div>
        </div>
      </div>
    </section>
  </div>

  <script>
    // Click-to-cycle: move the last card to first position
    document.querySelectorAll(".stack").forEach((stack) => {
      function cycle() {
        const cards = [...stack.querySelectorAll(".stack__card")];
        if (cards.length < 2) return;
        const last = cards[cards.length - 1];
        last.classList.add("cycling");
        last.addEventListener("animationend", () => {
          last.classList.remove("cycling");
          stack.prepend(last);
        }, { once: true });
      }
      stack.addEventListener("click", cycle);
      stack.addEventListener("keydown", (e) => {
        if (e.key === "Enter" || e.key === " ") { e.preventDefault(); cycle(); }
      });
    });
  </script>
</body>
</html>

Layered card deck with hover fan-out and click-to-cycle interactions.

Behavior

Default — cards stack with slight vertical offset and scale reduction per layer
Hover — cards fan out using rotate transforms, revealing all cards in the stack
Click — the bottom card moves to the top with a flip animation

Implementation

Pure CSS for the stack and fan-out; a single data-active index on the wrapper handles click cycling via CSS sibling combinators. No JavaScript required for the hover fan — only a minimal <script> is included for the click-to-cycle behavior to update the wrapper class.