<style>
.grid-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
}

.card {
  position: relative;
  overflow: hidden;
  border-radius: 10px;
}

.card img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

/* Overlay */
.overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  opacity: 0;
  transition: opacity 0.4s ease;
  padding: 10px;
}

/* Hover effects */
.card:hover img {
  transform: scale(1.1);
}

.card:hover .overlay {
  opacity: 1;
}
</style>

<div class="grid-container">

  <a href="pagina1.html" class="card">
    <img src="immagine1.jpg" alt="">
    <div class="overlay">Testo 1</div>
  </a>

  <a href="pagina2.html" class="card">
    <img src="immagine2.jpg" alt="">
    <div class="overlay">Testo 2</div>
  </a>

  <a href="pagina3.html" class="card">
    <img src="immagine3.jpg" alt="">
    <div class="overlay">Testo 3</div>
  </a>

  <a href="pagina4.html" class="card">
    <img src="immagine4.jpg" alt="">
    <div class="overlay">Testo 4</div>
  </a>

</div>