index.css

* {
  padding: 0;
  margin: 0;
}

header {
  border: 2px solid #1c1c1c;
  width: 80%;
  margin: 20px auto auto auto;
  align-items: center;
  justify-content: space-between;
  display: flex;
  height: 30px;
  padding-left: 10px;
}

.navHeader {
  font-size: 20px;
}

.navUl {
  padding-right: 10px;
  font-size: 14px;
  font-weight: 700;
  gap: 20px;
  list-style-type: none;
  display: flex;
  align-items: center;
}

.list {
  cursor: pointer;
}

.list:nth-child(1) {
  border-right: 2px solid #111;
  width: 30px;
}

.list:nth-child(2) {
  border-right: 2px solid #111;
  width: 60px;
}

.addNew.list1 {
  color: blue;
}

.list-main.list1 {
  color: blue;
}

.date-time {
  display: flex;
  width: 80%;
  margin: 20px auto auto auto;
  justify-content: right;
}

#dateTime {
  display: flex;
  font-size: 14px;
  font-weight: 700;
}

.awesomeBooks {
  margin-top: 50px;
  margin-bottom: 30px;
  text-align: center;
  display: none;
}

.bookDiv {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 5%;
  font-family: sans-serif;
  font-weight: bold;
}

.books {
  display: none;
  margin: auto;
  width: 80%;
  border: 2px solid black;
}

.bookForm {
  padding-top: 20px;
  width: 40%;
  margin: auto;
  display: none;
}

.btn {
  display: flex;
  justify-content: right;
}

.add {
  padding: 5px;
  box-shadow: #1c1c1c 2px 2px;
}

.form-heading {
  margin-top: 20px;
  margin-bottom: 50px;
  font-family: sans-serif;
  text-align: center;
}

.bookTitleAuthor {
  font-size: 14px;
}

.title {
  width: 100%;
  padding: 3px;
}

.author {
  width: 100%;
  padding: 3px;
}

.delete {
  padding: 4px 2px;
  box-shadow: #1c1c1c 3px 3px;
}

.newBook:nth-child(even) {
  background-color: #fff;
}

.newBook:nth-child(odd) {
  background-color: #eee;
}

.hidy {
  display: none;
}

.by {
  font-family: sans-serif;
  font-weight: 600;
  font-size: 14px;
}

.contact {
  display: none;
  font-family: sans-serif;
  margin-top: 30px;
  justify-content: center;
}

.contactHeader {
  text-align: center;
  margin-bottom: 50px;
}

.contactParagraph {
  font-weight: 600;
}

.contactUl {
  list-style-type: none;
  font-weight: 600;
  margin-top: 30px;
}

footer {
  position: absolute;
  bottom: 5px;
  height: 30px;
  width: 100%;
}

.footerDiv {
  width: 80%;
  margin: auto;
  border: 2px solid #111;
  font-family: sans-serif;
}

.footerHeader {
  margin-left: 20px;
}

@media (max-width: 550px) {
  .navHeader {
    font-size: 14px;
  }

  ul {
    padding-right: 10px;
    font-size: 10px;
    font-weight: 700;
    gap: 20px;
    list-style-type: none;
    display: flex;
    align-items: center;
  }

  .list {
    cursor: pointer;
  }

  .list:nth-child(1) {
    border-right: 2px solid #111;
    width: 20px;
  }

  .list:nth-child(2) {
    border-right: 2px solid #111;
    width: 42px;
  }

  .list:nth-child(3) {
    width: 30px;
  }
}