html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background-image: url("UploadImage/paperwallpaper.jpg");
}

h1 {
  text-align: center;
}

.binder{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 20px;
}

.binder-img{
  width: 100%;
  aspect-ratio: 2.5 / 3.5;
  object-fit: cover;
  border: 3px solid #fff; 
  box-shadow: 2px 2px 6px rgba(0,0,0,0.3);
}