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

body {
  max-width: 768px;
  margin: 5px auto;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 2px solid #000;
  height: 8vh;
  padding: 0 20px;
}

li a {
  text-decoration: none;
  color: #000;
  font-weight: bold;
  font-size: 18px;
}

header p a {
  font-weight: bold;
  text-decoration: none;
  color: #000;
  font-size: 18px;
}

ul {
  display: flex;
  gap: 20px;
}

header ul li {
  list-style: none;
  border-right: 2px solid #000;
  padding-right: 10px;
}

.content-contianer {
  height: 80vh;
}

.list {
  max-width: 100%;
  height: auto;
  text-align: center;
}

.list h1 {
  margin: 24px;
  font-size: 32px;
}

.ul-list {
  display: flex;
  flex-direction: column;
  text-align: left;
  padding-left: 5rem;
  gap: 0.5rem;
}

.date-time {
  text-align: end;
  font-weight: 700;
}

main {
  max-width: 50%;
  margin: 0 auto;
  height: auto;
}

#form {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 20px;
}

.contact h2 {
  margin: 24px;
  font-size: 32px;
}

#form h2 {
  margin: 24px;
  font-size: 32px;
}

.contact {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

footer p {
  font-weight: bold;
}

.contact p {
  padding: 1rem;
  line-height: 1.5rem;
}

.add-btn {
  width: 70px;
  height: 2rem;
  box-shadow: 2px 3px 0 black;
  background-color: #fff;
  align-self: end;
  margin-right: 3rem;
}

.book-list {
  width: 100%;
  border: 2px solid #000;
}

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

.book-space:nth-of-type(odd) {
  background-color: rgb(185, 180, 180);
  height: 30px;
}

.book-space:nth-of-type(even) {
  background-color: #fff;
  height: 30px;
}

.book-des {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 10px;
}

.remove {
  width: auto;
  height: 20px;
  margin: 0 10px;
  box-shadow: 2px 3px 0 black;
}

.book-title {
  width: 75%;
  height: 2rem;
  border: 2px solid black;
}

.book-author {
  width: 75%;
  height: 2rem;
  border: 2px solid black;
}

footer {
  display: flex;
  align-items: center;
  border: 2px solid #000;
  height: 8vh;
  padding: 0 20px;
}

.disapear {
  display: none;
}