index.css

* {
  text-decoration: none;
  padding: 0;
  margin: 0;
  list-style: none;
}

body {
  line-height: 20px;
}

section h1 {
  align-items: center;
  text-align: center;
  margin-bottom: 15px;
}

#book-list h1 {
  align-items: center;
  text-align: center;
}

.title {
  align-items: center;
  text-align: center;
  margin-bottom: 15px;
}

header {
  margin-bottom: 50px;
}

.page-banner {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  border: 2px solid grey;
  padding: 10px;
  align-items: center;
  margin: 0 20px;
}

#date {
  float: right;
  margin-right: 15px;
}

.right {
  display: flex;
  margin-right: 10px;
}

.right li {
  margin-left: 12px;
  cursor: pointer;
  padding-left: 5px;
}

.border {
  border-right: 2px solid grey;
  padding-right: 5px;
}

.right .border:hover {
  border-right: 3px solid rgb(124, 124, 236);
}

.list-items {
  display: flex;
  justify-content: space-between;
}

section ul {
  list-style: circle;
}

.book-container ul {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  gap: 2%;
}

.book-container button {
  padding: 5px;
  box-shadow: 5px 2px;
}

.form {
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  display: none;
}

#book-list {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.book-container {
  border: 2px solid grey;
  margin: 15px auto;
  width: 80%;
}

input {
  border: 2px solid;
  padding: 5px;
  border-radius: 5px;
  margin-bottom: 8px;
}

.book-container div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1%;
  height: 35px;
}

.book-container div:nth-child(odd) {
  background: lightgrey;
}

.add {
  margin-top: 1%;
  box-shadow: 5px 2px;
  padding: 10px;
  float: right;
}

section {
  list-style-type: circle;
  margin: auto 18%;
  display: none;
}

.contact-details {
  flex-direction: column;
  display: none;
  align-items: center;
}

.contact-details ul li {
  list-style-type: disc;
}

.footer {
  position: fixed;
  border: 2px solid grey;
  padding: 10px;
  align-items: center;
  text-align: center;
  width: 100%;
  bottom: 0;
}