:root {
  --background: #3C343D;
}

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

header{
  top: 20px;
  height: 175px;
  text-align: center;
}

.background {
  background-color: var(--background);
  display:grid;
  place-items: center;
  height: 100vh;
}

.gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: 800px;
}

.card { 
  position: relative;
  left: 0px;
  width: 150px;
  border-radius: 16px;
  height: 300px;
  overflow: hidden;
  background-color: var(--background);
  transition: 0.4s ease-in-out;
  box-shadow: 0.5px 12px rgba(0, 0, 0, 0.5);
  flex: 0.25;
}

.card img {
  height: 300px;
}

.card:hover {
  flex: 2;
  font-weight: bold;
  cursor: pointer;
  border-radius: 8px;
}