* {
  margin: 2px;
  background-color: #fff;
  padding: 5px;
}

.head {
  display: flex;
  justify-content: space-between;
  text-align: center;
  border: 2px solid black;
  cursor: pointer;
}

.head ul {
  display: flex;
  text-align: center;
}

.head ul li {
  text-decoration: none;
  display: flex;
  margin-left: 25px;
  margin-top: 10px;
}

#book-list {
  border: 2px solid black;
}

.book-heading {
  margin-bottom: 10px;
  font-size: 28px;
  text-align: center;
}

.book-item {
  display: flex;
  align-items: center;
  padding: 10px;
  margin-bottom: 20px;
  background-color: #f2f2f2;
  border-radius: 4px;
}

.info-container {
  display: flex;
  flex-grow: 1;
  flex-direction: row;
}

.book-title {
  font-weight: bold;
  padding-right: 5px;
}

.remove-btn {
  padding: 1px;
  background-color: #f44336;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.sec {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-content: center;
  padding-left: 35%;
  padding-right: 20%;
}

input {
  display: flex;
  width: 350px;
  align-content: center;
  justify-content: center;
}

.add-btn {
  width: 50px;
  margin-left: 310px;
}

.tr {
  margin-left: 100px;
}

#contact-section {
  text-align: center;
}

ul span {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.footer {
  background-color: antiquewhite;
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  text-align: center;
}

.hidden {
  display: none;
}

#dateTime {
  text-align: center;
}