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

html {
  font-size: 10px;
}

body {
  font-family: 'Lato', Arial, Helvetica, sans-serif;
  background-color: lightgray;
  height: 100%;
  overflow: hidden;
}

header {
  padding: 2rem 20%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #fff;
  box-shadow: 1px 3px 3px -1px rgba(0, 0, 0, 0.77);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
}

.date {
  position: fixed;
  top: 10rem;
  right: 20%;
  color: #000;
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.5rem;
}

nav ul {
  list-style: none;
  display: flex;
  align-items: center;
}

nav ul li a {
  color: #000;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 400;
}

nav ul li {
  display: flex;
  align-items: center;
  border-left: 0.1rem solid #000;
  padding: 0 2rem;
}

.logo {
  text-decoration: none;
  color: #000;
  font-size: 2.8rem;
  font-weight: 900;
}

.list-book {
  padding: 10rem 20%;
  display: flex;
  align-items: center;
  flex-direction: column;
  background-color: #fff;
  margin-top: 4rem;
  border-bottom-right-radius: 10rem;
}

table {
  width: 100%;
}

table,
th,
td {
  border: 1px solid silver;
  padding: 5px;
}

th {
  text-align: start;
  text-transform: uppercase;
  background-color: silver;
}

tr td:last-child {
  display: flex;
  justify-content: space-around;
  border-bottom-width: 1px;
  border-color: silver;
}

tr td:last-child a {
  color: rgb(26, 26, 97);
}

.list-book h2 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 2.4rem;
  margin-bottom: 3rem;
}

.list-book-body {
  width: 100%;
  border: 0.3rem solid #000;
}

.bookBackground {
  background-color: #ddd;
}

.list-book .book {
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 1rem 2rem;
}

.list-book .book .title,
.author {
  font-size: 1.5rem;
  font-weight: 400;
  color: #000;
}

.list-book .book .author {
  justify-self: flex-start;
}

.book-details {
  display: flex;
  column-gap: 1rem;
  align-items: center;
}

.add-book form button {
  align-self: flex-end;
  padding: 1rem;
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.5rem;
  color: #000;
  border: 0.1rem solid #000;
}

.list-book .book button {
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.5rem;
  color: #000;
  border: 0.1rem solid #000;
  padding: 1rem;
}

.add-book {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10rem 0;
  margin: 5rem 0;
  background-color: #fff;
  border-top-left-radius: 10rem;
}

.add-book form {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 30%;
  row-gap: 2rem;
}

.add-book form input {
  width: 100%;
  padding: 1rem;
}

.add-book h2 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 2.4rem;
  margin-bottom: 3rem;
}

.contact-information {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10rem 30%;
  row-gap: 1rem;
  background-color: #fff;
  border-top-left-radius: 10rem;
}

section {
  height: 100vh;
  margin: 0 24px;
}

.contact-information h2 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 2.4rem;
  margin-bottom: 3rem;
}

footer p {
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.5rem;
  color: #000;
}

.contact-information p {
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.5rem;
  color: #000;
  align-self: flex-start;
}

.contact-information ul {
  align-self: flex-start;
  margin-top: 3rem;
  padding-left: 3rem;
}

.contact-information ul li {
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.5rem;
  color: #000;
}

footer {
  margin-top: 5rem;
  padding: 2rem 20%;
  background-color: #fff;
}