Effets CSS Boutons & Hover

<div class="demo-preview">
  <div class="atc-scene" data-atc data-icon="🎧">
    <div class="atc-cart-wrap">
      <span class="atc-cart" aria-hidden="true">🛒</span>
      <span class="atc-count" data-atc-count aria-label="Articles dans le panier">0</span>
    </div>
    <div class="atc-product">
      <div class="atc-thumb" aria-hidden="true">🎧</div>
      <div class="atc-info">
        <h3>Casque Studio Pro</h3>
        <span class="atc-price">149 €</span>
        <div><button type="button" class="atc-btn" data-atc-btn>Ajouter au panier</button></div>
      </div>
    </div>
  </div>
</div>

.demo-preview,
.demo-preview *,
.demo-preview *::before,
.demo-preview *::after {
  box-sizing: border-box
}

.demo-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 200px;
  position: relative;
  background: rgb(26, 26, 36);
  color: rgb(255, 255, 255);
  font-family: sans-serif;
}

.atc-scene {
  position: relative;
  width: 100%;
  min-height: 240px;
  border-radius: 14px;
  overflow: hidden;
  isolation: isolate;
  background: radial-gradient(circle at 70% 20%, #1c1330, #0b0a14 75%);
  padding: 22px;
  box-sizing: border-box;
}

.atc-cart {
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 26px;
  line-height: 1;
}

.atc-count {
  position: absolute;
  top: -8px;
  right: -10px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  box-sizing: border-box;
  background: #ef4444;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: 999px;
  display: grid;
  place-items: center;
}

.atc-cart-wrap {
  position: absolute;
  top: 16px;
  right: 18px;
}

.atc-product {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 360px;
  margin-top: 34px;
}

.atc-thumb {
  width: 78px;
  height: 78px;
  border-radius: 14px;
  background: linear-gradient(135deg, #6366f1, #d946ef);
  display: grid;
  place-items: center;
  font-size: 38px;
  flex: none;
}

.atc-info h3 {
  margin: 0 0 2px;
  font-size: 16px;
  color: #fff;
}

.atc-info .atc-price {
  color: #a78bfa;
  font-weight: 700;
}

.atc-btn {
  margin-top: 14px;
  border: 0;
  cursor: pointer;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  padding: 11px 20px;
  border-radius: 10px;
  transition: transform .12s, box-shadow .2s;
  will-change: transform;
}

.atc-btn:hover {
  box-shadow: 0 8px 24px rgba(245, 158, 11, .35);
}

.atc-btn:active {
  transform: scale(.96);
}

.atc-particle {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #fbbf24;
  pointer-events: none;
  transform: translate(-50%, -50%);
  animation: atc-burst .6s ease-out forwards;
  z-index: 4;
}

.atc-fly {
  position: absolute;
  font-size: 30px;
  pointer-events: none;
  z-index: 5;
  transform: translate(-50%, -50%);
}

.atc-pop {
  animation: atc-pop .32s ease;
}

.atc-bump {
  animation: atc-bump .4s ease;
}

@media (prefers-reduced-motion: reduce) {
  .atc-btn {
    transition: none;
  }
}

@keyframes atc-burst {
  to {
    transform: translate(-50%, -50%) translate(var(--dx), var(--dy)) scale(.2);
    opacity: 0;
  }
}

@keyframes atc-pop {
  0% {
    transform: scale(1);
  }

  40% {
    transform: scale(1.6);
  }

  100% {
    transform: scale(1);
  }
}

@keyframes atc-bump {

  0%,
  100% {
    transform: translateY(0);
  }

  30% {
    transform: translateY(-7px) rotate(-8deg);
  }
}

(function() {
  (function() {
    var reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;

    document.querySelectorAll('[data-atc]').forEach(function(scene) {
      var btn = scene.querySelector('[data-atc-btn]');
      var cart = scene.querySelector('.atc-cart');
      var countEl = scene.querySelector('[data-atc-count]');
      var icon = scene.dataset.icon || '🛍️';
      var n = 0;

      if (!reduceMotion) {
        btn.addEventListener('pointermove', function(e) {
          var r = btn.getBoundingClientRect();
          var mx = e.clientX - (r.left + r.width / 2),
            my = e.clientY - (r.top + r.height / 2);
          btn.style.transform = 'translate(' + (mx * 0.22) + 'px,' + (my * 0.35) + 'px)';
        });
        btn.addEventListener('pointerleave', function() {
          btn.style.transform = '';
        });
      }

      function bump() {
        n++;
        countEl.textContent = n;
        countEl.classList.remove('atc-pop');
        void countEl.offsetWidth;
        countEl.classList.add('atc-pop');
        cart.classList.remove('atc-bump');
        void cart.offsetWidth;
        cart.classList.add('atc-bump');
      }

      btn.addEventListener('click', function() {
        if (reduceMotion) {
          bump();
          return;
        }
        var br = btn.getBoundingClientRect(),
          cr = cart.getBoundingClientRect(),
          sr = scene.getBoundingClientRect();
        var x0 = br.left + br.width / 2 - sr.left,
          y0 = br.top + br.height / 2 - sr.top;
        var x1 = cr.left + cr.width / 2 - sr.left,
          y1 = cr.top + cr.height / 2 - sr.top;

        for (var i = 0; i < 14; i++) {
          var p = document.createElement('span');
          p.className = 'atc-particle';
          p.style.left = x0 + 'px';
          p.style.top = y0 + 'px';
          var a = Math.random() * 6.2832,
            d = 24 + Math.random() * 46;
          p.style.setProperty('--dx', Math.cos(a) * d + 'px');
          p.style.setProperty('--dy', Math.sin(a) * d + 'px');
          scene.appendChild(p);
          (function(el) {
            setTimeout(function() {
              el.remove();
            }, 650);
          })(p);
        }

        var chip = document.createElement('span');
        chip.className = 'atc-fly';
        chip.textContent = icon;
        chip.style.left = x0 + 'px';
        chip.style.top = y0 + 'px';
        scene.appendChild(chip);
        var t0 = performance.now(),
          dur = 620,
          cx = (x0 + x1) / 2,
          cy = Math.min(y0, y1) - 70;
        (function anim(t) {
          var k = Math.min((t - t0) / dur, 1);
          var e = k < .5 ? 2 * k * k : 1 - Math.pow(-2 * k + 2, 2) / 2,
            m = 1 - e;
          var x = m * m * x0 + 2 * m * e * cx + e * e * x1;
          var y = m * m * y0 + 2 * m * e * cy + e * e * y1;
          chip.style.transform = 'translate(-50%,-50%) translate(' + (x - x0) + 'px,' + (y - y0) + 'px) scale(' + (1 - 0.55 * e) + ')';
          chip.style.opacity = String(1 - 0.25 * e);
          if (k < 1) requestAnimationFrame(anim);
          else {
            chip.remove();
            bump();
          }
        })(t0);
      });
    });
  })();
})();