header {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  padding: 0 1rem;
  border: 2px solid #222;
}

nav ul {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  width: 15rem;
  list-style: none;
}

nav ul li a {
  text-decoration: none;
  color: rgb(34, 30, 30);
  font-size: 1.2rem;
  font-weight: bold;
}

nav ul li a:hover {
  text-decoration: none;
  color: rgb(137, 160, 181);
  font-size: 1.2rem;
  font-weight: bold;
}

nav ul .separate {
  height: 1.2rem;
  width: 0.1rem;
  background-color: #222;
}

.divide {
  width: 100px;
  height: 1px;
  background-color: #222;
  box-shadow: 5px 5px 5px #222;
}

.unique {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 3px solid #222;
}

section {
  border: 0 solid #222;
}

h2 {
  text-align: center;
  font-size: 1.2rem;
  font-weight: bold;
}

form {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0;
}

.title_list {
  display: flex;
  justify-content: center;
  font-size: 3rem;
  font-weight: 100;
  margin-bottom: 3rem;
}

.time {
  text-align: right;
  font-size: 1rem;
  padding: 0;
  margin-top: 0.5rem;
  margin-bottom: 2rem;
}

.data {
  width: 15rem;
  height: 1rem;
  border: 3px solid #222;
}

.book {
  display: flex;
  flex-direction: row;
  align-items: center;
}

.title {
  width: 100%;
  font-size: 1rem;
  height: 30px;
  display: flex;
  align-items: center;
  padding-left: 20px;
}

.delete {
  cursor: pointer;
  box-shadow: 5px 5px 5px #222;
  margin-right: 20px;
}

.add {
  cursor: pointer;
  display: flex;
  justify-content: flex-end;
  width: 25rem;
}

.add input {
  box-shadow: 5px 5px 5px #222;
}

.title_add_book {
  display: none;
  justify-content: center;
  font-size: 3rem;
  font-weight: 100;
  margin-bottom: 3rem;
}

#books__add {
  display: none;
  height: 96px;
}

#books__add .data {
  width: 25rem;
  height: 1.6rem;
}

.title_footer {
  display: none;
  width: 100%;
  justify-content: center;
  font-size: 3rem;
  font-weight: 400;
  height: 19px;
}

.contact {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  margin: 0;
  padding: 0;
}

.contact p {
  text-align: justify;
  font-size: 1.5rem;
  font-weight: 500;
  color: #222;
  margin: 0;
  padding: 0;
}

.contact li {
  font-size: 1rem;
  font-weight: 520;
  color: #222;
}

.footer_class {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  height: 2.5rem;
  border: 2px solid #222;
  margin-top: 5rem;
  border-radius: 3px;
  padding-left: 1.25rem;
}