body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.header {
  width: 100vw;
}

#books {
  max-height: 50vh;
  max-width: 80vw;
  overflow-y: scroll;
}

.contact {
  width: 50vw;
  height: 60vh;
}

.footer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  background-color: rgb(206, 205, 205);
  color: black;
  text-align: center;
}

.nav-item {
  cursor: pointer;
}