/* resets */
html {
  scroll-behavior: smooth;
  font-family: sans-serif;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
  color: black;
}

/* commun */
.link.link--active {
  color: rgb(43, 100, 243);
}

.button {
  padding: 4px 8px;
  font-weight: 600;
  border-radius: 0;
  background-color: #fff;
  box-shadow: 2px 2px 0 0 rgba(0, 0, 0, 1);
  -webkit-box-shadow: 2px 2px 0 0 rgba(0, 0, 0, 1);
  -moz-box-shadow: 2px 2px 0 0 rgba(0, 0, 0, 1);
}

.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

.section {
  display: flex;
  flex-direction: column;
  max-height: 0;
  visibility: hidden;
  overflow: hidden;
  opacity: 0;
  transition: opacity ease-in-out 1s;
}

.section.section--active {
  visibility: visible;
  max-height: none;
  opacity: 1;
}

.section h1 {
  margin-top: 24px;
  text-align: center;
}

/* Header */
.header {
  text-align: center;
}

.header__nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
  border: 1px solid gray;
  height: 40px;
}

.header__nav-title {
  font-size: 16px;
  font-weight: 600;
}

.header__nav-list {
  list-style: none;
  display: flex;
}

.header__nav-list-item {
  display: flex;
  align-items: center;
  font-size: 20px;
}

.header__nav-list-item:not(:last-child)::after {
  content: "";
  display: block;
  min-width: 2px;
  height: 24px;
  margin: 0 18px;
  border-radius: 1px;
  background-color: rgb(43, 100, 243);
}

.header__time {
  text-align: right;
  margin: 4px 0;
}

/* Books list */
.books-list {
  border: 4px solid black;
}

/* Book card */
.book-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
}

.book-card:nth-child(2n+1) {
  background-color: #eaeaea;
}

.book-card .book-card__content {
  font-weight: 600;
}

/* Book form */
.book-form {
  max-width: 500px;
  margin: 0 auto;
  padding-bottom: 4px;
}

.book-form .book-form__input {
  width: 100%;
  padding: 4px 8px;
  margin-bottom: 24px;
  height: 30px;
  border: 2px solid #000;
  font-weight: 600;
  color: #000;
}

/* Contact */
.contact {
  max-width: 600px;
  margin: 0 auto;
}

.contact ul {
  list-style: disc;
}

/* Footer */
.footer {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 30px;
}

.footer .footer__content {
  padding: 12px 24px;
  font-size: 18px;
  font-weight: 600;
  border: 1px solid black;
}