body {
  margin: 0;
  padding: 0;
}

.notebook {
  background-image: url('images/notebook.jpg');
  background-size: cover;
  background-position: center;
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.sticker {
  position: absolute;
  width: 100px;
  transition: transform 0.2s;
}

.sticker:hover {
  transform: scale(1.1) rotate(2deg);
}

#tree {
  top: 20%;
  left: 30%;
}

#bow {
  top: 60%;
  left: 50%;
}