style.css

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

body {
  height: 100vh;
  display: grid;
  place-items: center;
  padding: 5em 5em;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 0.5fr));
  grid-template-rows: repeat(2, 300px);
  grid-auto-flow: dense;
  gap: 0.5em;
  width: 100%;
}

.grid-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: pointer;
  transition: transform 0.6s ease-in-out;
}

.grid-container div {
  border-radius: 5px;
  overflow: hidden;
}

.grid-item1 {
  grid-row: span 2;
}

.grid-item3 {
  grid-column: 2 / 4;
  grid-row: 2 / 3;
}

.grid-item4 {
  grid-row: 1 / 3;
  grid-column: 4 / 5;
}

.grid-container img:hover {
  transform: scale(1.1);
}

@media (width <= 990px) {
  body {
    padding: 2em 2em;
  }

  .grid-container {
    grid-template-columns: repeat(4, minmax(100px, 1fr));
    grid-template-rows: repeat(4, 200px);
    padding-bottom: 2em;
  }

  .grid-item1 {
    grid-column: 1 / 3;
    grid-row: 1 / 3;
  }

  .grid-item2 {
    grid-column: 3 / 6;
    grid-row: 1 / 3;
  }

  .grid-item3 {
    grid-column: 3 / 6;
    grid-row: 3 / 4;
  }

  .grid-item4 {
    grid-row: 3 / 5;
    grid-column: 1 / 3;
  }

  .grid-item5 {
    grid-column: 3 / 6;
    grid-row: 4 / 5;
  }
}

@media (width <= 400px) {
  body {
    padding: 1em 1em;
  }

  .grid-container {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(auto-fit, 200px);
    padding-bottom: 2em;
  }

  .grid-container > * {
    grid-column: unset;
    grid-row: unset;
  }
}