style.css

body {
  margin: 0;
  top: 0;
}

.books {
  border: 1px solid gray;
  background-color: aliceblue;
  margin: auto 50px;
}

h1 {
  font-size: 30px;
  font-weight: bold;
  text-align: center;
  margin: 0;
  padding: 5px;
}

.new-book {
  margin: auto 50px;
  justify-content: center;
  display: flex;
}

.btn {
  margin-left: 185px;
  margin-top: -8px;
  background-color: green;
  color: #fff;
  width: 60px;
  border: none;
}

input {
  margin-top: 10px;
  width: 350px;
}

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

ul {
  list-style-type: none;
}

.remove {
  width: 78px;
  color: #fff;
  background-color: red;
  border: none;
  margin-right: 29px;
  margin-top: 14px;
  padding: 3px;
  height: 22px;
}

nav {
  display: flex;
  justify-content: space-between;
  border: 2px solid gray;
  margin: 0 10px;
}

h1 a {
  text-decoration: none;
  color: black;
  font-size: 30px;
}

.nav-items {
  display: flex;
}

.nav-items:focus {
  color: rgb(48, 48, 241);
}

.nav-items li a {
  text-decoration: none;
  padding-right: 5px;
  margin-right: 5px;
  color: black;
}

.nav-items li a:active {
  color: blue;
}

.nav-item-1,
.nav-item-2 {
  border-right: 2px solid gray;
}

.time {
  display: flex;
  justify-content: end;
  padding: 5px 1px;
  margin-right: 10px;
}

.contact {
  text-align: center;
  margin: 45px 0;
  gap: 20px;
  display: none;
  flex-direction: column;
}

.contact p {
  margin-left: 50px;
}

.footer {
  border: 1px solid gray;
  margin: 10px 10px;
  padding: 5px 10px;
}

footer {
  padding: 5px 10px;
  bottom: 0;
  position: fixed;
  width: 97.7%;
}

form {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.form-element {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.display {
  display: none;
}