* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 20px;
}

.center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.mb-0 {
  margin-bottom: 0;
}

/*nav*/
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #333;
  padding-right: 1rem;
  padding-left: 1rem;
  color: white;
  flex-wrap: wrap;
}

.nav a {
  color: white;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 0.8rem;
}

.hamburger-menu {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        padding-top: 1rem;
    }

    .nav-links.show {
        display: flex;
    }

    .nav-links a {
        padding: 0.5rem 0;
        width: 100%;
        text-align: left;
    }

    .hamburger-menu {
        display: block;
    }
}
/**/

.form {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  border-radius: 8px;
}

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

.form > form > button {
  margin-top: 1rem;
}

.color-gray {
  color: #c7c6c1;
}

.color-red {
  color: red;
}

.highlight-link {
  font-weight: bold;
}


  .book-detail-container {
    width: 90%;
    max-width: 800px;
    margin: 2rem;
  }

  .book-detail-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #2c3e50;
  }

  .book-meta p {
    color: #555;
    margin-bottom: 0.8rem;
    border-bottom: 1px dashed #eee;
    padding-bottom: 0.5rem;
  }

  .book-description {
    margin-top: 1.5rem;
    padding-top: 1rem;
    font-size: 1rem;
    color: #666;
  }

  .book-actions {
    margin-top: 2.5rem;
    text-align: center;
  }

  .btn-back {
    padding: 12px 24px;
    background-color: #3498db;
    color: white;
  }

  .book-actions > a {
    color: white;
    text-decoration: none;
  }

  .btn-back:hover {
    background-color: #2980b9;
  }


.books-list-container {
  width: 90%;
  max-width: 1200px;
  margin: 2rem;
  padding: 1.5rem;
}

.books-list-container h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: #333;
  font-size: 1.8rem;
}

.books-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

.book-card {
  background-color: #f9f9f9;
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  padding: 1rem;
}

.book-card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.book-card h3 a {
  color: #007bff;
}

/* media queries */
@media (min-width: 600px) {
  .books-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .books-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .books-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.books-list-container p {
  text-align: center;
  color: #555;
}

.books-list-container a {
  color: #007bff;
}

.search-box {
  padding: 0.4rem;
  width: 70%;
  max-width: 400px;
  margin-bottom: 1rem;
}

.search-button {
  padding: 0.7rem;
  background-color: #007bff;
  color: white;
  border: none;
  margin-bottom: 0.5rem;
}
.search-button:hover {
  background-color: #2c3e50;
}

/* admin books view  */
.admin-books-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr; /* one column on small screens */
}

@media (min-width: 600px) {
  .admin-books-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .admin-books-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.admin-book-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.admin-book-actions {
    display: flex;
    justify-content: space-around;
    margin-top: 1rem;
}

.button {
    display: inline-block;
    padding: 0.5rem;
    border: none;
    margin: 0.3rem;
    color: white;
    text-align: center;
}

.edit-button {
    background-color: #4CAF50; /* Green */
}

.edit-button:hover {
    background-color: #45a049; /* Darker green */
}

.delete-button {
    background-color: #f44336; /* Red */
}

.delete-button:hover {
    background-color: #da190b; /* Darker red */
}

/* reviews */

.reviews-section {
  margin-top: 2rem;
  width: 100%;
}

.review-form {
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  padding: 1.5rem;
  border-radius: 8px;
  background-color: #fafafa;
  border: 1px solid #e0e0e0;
}

.reviews-container {
  margin-top: 2rem;
}

.review {
  padding: 1rem 0;
  border-bottom: 1px solid #e0e0e0;
}

.review:last-child {
  border-bottom: none;
}

.review p {
  margin: 0.3rem 0;
}

.review small {
  color: #777;
}

.book-rating {
    font-size: 0.9em;
    color: #555;
}

.detail-list {
  display: flex;
  gap: 2rem;
}

.flex-1 {
  flex: 1;
}

.flex-3 {
  flex: 3;
}

.h2-error {
  color: #555;
  font-size: 1.5rem;
  text-align: center;
  margin-top: 2rem;
}

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

.mb-1rem {
  margin-bottom: 1rem;
}

.no-decoration {
  text-decoration: none;
  color: #fff;
}

/* feed */
/* Feed Container */
.feed-container {
  width: 90%;
  max-width: 800px;
  margin: 2rem;
}

.feed-container h2 {
  text-align: center;
  margin-bottom: 1.5rem;
}

.feed-list {
  list-style: none;
  padding: 0;
}

.feed-item {
  background-color: #fff;
  padding: 1rem;
  margin-bottom: 1rem;
}

.feed-item-title a {
  text-decoration: none;
  color: #007bff;
  font-weight: bold;
}

.feed-item-meta {
  color: #777;
  margin-top: 0.3rem;
  margin-bottom: 0.5rem;
}

.feed-item-description {
  margin: 0;
  color: #333;
}

.btn-new-group {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: #f9f9f9;
  text-decoration: none;
  border: 2px solid #333;
  padding-bottom: 0.6rem;
  border-radius: 4px;
}