:root {
  --primary-black: #0a0a0a;
  --secondary-black: #1a1a1a;
  --tertiary-black: #2a2a2a;
  --gold: #d4af37;
  --gold-light: #f4d03f;
  --gold-dark: #b8941f;
  --white: #ffffff;
  --gray-light: #f8f9fa;
  --gray-medium: #6c757d;
  --gray-dark: #343a40;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Heebo", sans-serif;
  background: linear-gradient(
    135deg,
    var(--primary-black) 0%,
    var(--secondary-black) 100%
  );
  color: var(--white);
  line-height: 1.6;
  min-height: 100vh;
  direction: rtl;
}

/* Navigation */
.navbar {
  background: var(--primary-black);
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 2px solid var(--gold);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
  flex-direction: row-reverse;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--gold);
  font-weight: 700;
  font-size: 1.5rem;
  transition: var(--transition);
}

.nav-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  transition: var(--transition);
}

.nav-brand:hover {
  color: var(--gold-light);
  transform: translateY(-1px);
}

.nav-brand:hover .nav-logo {
  transform: translateY(-1px) scale(1.05);
}

.nav-menu {
  display: flex;
  gap: 2rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--white);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: var(--transition);
}

.nav-link:hover {
  background: var(--tertiary-black);
  color: var(--gold);
}

/* Main Content */
.main-content {
  min-height: calc(100vh - 140px);
  padding: 2rem 0;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(
    135deg,
    var(--secondary-black) 0%,
    var(--tertiary-black) 100%
  );
  padding: 4rem 2rem;
  text-align: center;
  margin-bottom: 3rem;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--gold);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--gray-light);
  margin-bottom: 2rem;
  font-weight: 300;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gold);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--gray-medium);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Sections */
.subjects-section,
.books-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--gold);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--gray-medium);
  font-weight: 300;
}

/* Grids */
.subjects-grid,
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

/* Cards */
.subject-card,
.book-card {
  background: var(--secondary-black);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  border: 1px solid var(--tertiary-black);
}

.subject-card {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  cursor: pointer;
}

.subject-card:hover,
.book-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(212, 175, 55, 0.2);
  border-color: var(--gold);
}

.subject-icon {
  width: 60px;
  height: 60px;
  background: var(--gold);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.subject-icon img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 8px;
}

.subject-icon i {
  font-size: 1.5rem;
  color: var(--primary-black);
}

.subject-info {
  flex: 1;
}

.subject-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--white);
}

.subject-id {
  font-size: 0.9rem;
  color: var(--gray-medium);
}

.subject-arrow {
  color: var(--gold);
  font-size: 1.2rem;
  transform: scaleX(-1);
}

/* Book Cards */
.book-card {
  text-align: center;
  display: flex;
  flex-direction: column;
}

.book-image {
  height: 150px; /* Reduced from 200px */
  width: 120px; /* Added fixed width */
  margin: 0 auto 1.5rem;
  border-radius: 12px;
  overflow: hidden;
  background: var(--tertiary-black);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.book-image img {
  width: 100%;
  height: 100%;
  object-fit: contain; /* Changed from cover to contain */
  image-rendering: -webkit-optimize-contrast; /* Improve rendering on Chrome */
  image-rendering: crisp-edges; /* Improve rendering on Firefox */
}

.book-placeholder {
  color: var(--gray-medium);
  font-size: 3rem;
}

.book-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--white);
  line-height: 1.4;
}

.book-details {
  margin-bottom: 1.5rem;
}

.book-id {
  font-size: 0.9rem;
  color: var(--gray-medium);
}

.book-btn {
  background: var(--gold);
  color: var(--primary-black);
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  margin-top: auto;
}

.book-btn:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

/* Page Header */
.page-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 3rem;
  text-align: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  flex-direction: row-reverse;
}

.breadcrumb-link {
  color: var(--gray-medium);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.breadcrumb-link:hover {
  color: var(--gold);
}

.breadcrumb-current {
  color: var(--gold);
  font-weight: 500;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--gold);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--gray-medium);
}

/* Solution Search */
.solution-search {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem;
}

.search-form {
  background: var(--secondary-black);
  border-radius: 16px;
  padding: 2.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--tertiary-black);
}

.form-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gold);
  margin-bottom: 2rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.search-inputs {
  display: grid;
  gap: 1.5rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-label {
  font-weight: 500;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-input {
  padding: 1rem;
  border: 2px solid var(--tertiary-black);
  border-radius: 8px;
  background: var(--primary-black);
  color: var(--white);
  font-size: 1rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.search-btn {
  background: var(--gold);
  color: var(--primary-black);
  border: none;
  padding: 1rem 2rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.search-btn:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

/* Solution Result */
.solution-result,
.no-solution {
  background: var(--secondary-black);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--tertiary-black);
  margin-bottom: 2rem;
}

.result-header {
  text-align: center;
  margin-bottom: 2rem;
}

.result-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.solution-content {
  text-align: center;
  margin-bottom: 2rem;
}

.solution-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.solution-img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
}

.solution-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.action-btn {
  background: var(--gold);
  color: var(--primary-black);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.action-btn:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

/* No Solution */
.no-solution-content {
  text-align: center;
  padding: 2rem;
}

.no-solution-content i {
  font-size: 3rem;
  color: var(--gray-medium);
  margin-bottom: 1rem;
}

.no-solution-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--white);
}

.no-solution-content p {
  color: var(--gray-medium);
}

/* Loading Spinner */
.loading-spinner {
  text-align: center;
  padding: 3rem;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--tertiary-black);
  border-top: 4px solid var(--gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Error Page */
.error-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
}

.error-content {
  max-width: 500px;
  margin: 0 auto;
  padding: 2rem;
}

.error-icon {
  font-size: 4rem;
  color: var(--gold);
  margin-bottom: 2rem;
}

.error-title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--white);
}

.error-message {
  font-size: 1.1rem;
  color: var(--gray-medium);
  margin-bottom: 2rem;
}

.error-btn {
  background: var(--gold);
  color: var(--primary-black);
  text-decoration: none;
  padding: 1rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.error-btn:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

/* Footer */
.footer {
  background: var(--primary-black);
  border-top: 2px solid var(--gold);
  padding: 2rem 0;
  margin-top: 4rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

.footer p {
  color: var(--gray-medium);
  font-size: 0.9rem;
}

/* Book Search */
.book-search-section {
  max-width: 1200px;
  margin: 0 auto 3rem;
  padding: 0 2rem;
}

.search-container {
  max-width: 600px;
  margin: 0 auto;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  right: 1rem;
  left: auto;
  color: var(--gray-medium);
  z-index: 1;
}

.book-search-input {
  width: 100%;
  padding: 1rem 3rem 1rem 1rem;
  border: 2px solid var(--tertiary-black);
  border-radius: 12px;
  background: var(--secondary-black);
  color: var(--white);
  font-size: 1rem;
  transition: var(--transition);
}

.book-search-input:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.clear-search-btn {
  position: absolute;
  left: 0.5rem;
  right: auto;
  background: var(--tertiary-black);
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-medium);
  cursor: pointer;
  transition: var(--transition);
}

.clear-search-btn:hover {
  background: var(--gold);
  color: var(--primary-black);
}

.no-results {
  text-align: center;
  padding: 3rem;
  background: var(--secondary-black);
  border-radius: 16px;
  border: 1px solid var(--tertiary-black);
}

.no-results-content i {
  font-size: 3rem;
  color: var(--gray-medium);
  margin-bottom: 1rem;
}

.no-results-content h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--white);
}

.no-results-content p {
  color: var(--gray-medium);
}

.input-help {
  font-size: 0.85rem;
  color: var(--gray-medium);
  font-style: italic;
  margin-top: 0.25rem;
}

.solution-info {
  background: var(--tertiary-black);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.5rem;
  text-align: left;
}

.solution-info p {
  margin: 0;
  color: var(--gray-light);
}

/* Questions Result Styles */
.questions-result {
  background: var(--secondary-black);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--tertiary-black);
  margin-bottom: 2rem;
}

.questions-content {
  text-align: center;
}

.questions-info {
  background: var(--tertiary-black);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.5rem;
  text-align: right;
}

.questions-info p {
  margin: 0;
  color: var(--gray-light);
}

.questions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.question-btn {
  background: var(--tertiary-black);
  color: var(--white);
  border: 2px solid var(--gold);
  padding: 1rem;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-family: "Heebo", sans-serif;
}

.question-btn:hover {
  background: var(--gold);
  color: var(--primary-black);
  transform: translateY(-2px);
}

.question-btn i {
  font-size: 1.5rem;
}

.back-btn {
  background: var(--tertiary-black);
  color: var(--white);
  border: 2px solid var(--gray-medium);
}

.back-btn:hover {
  background: var(--gray-medium);
  color: var(--white);
}

/* Collections Page Styles */
.collections-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2rem;
}

.collections-sidebar {
  background: var(--secondary-black);
  border-radius: 16px;
  padding: 1.5rem;
  height: fit-content;
  border: 1px solid var(--tertiary-black);
  box-shadow: var(--shadow-lg);
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--tertiary-black);
}

.sidebar-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--gold);
}

.create-collection-btn {
  background: var(--gold);
  color: var(--primary-black);
  border: none;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  font-family: "Heebo", sans-serif;
}

.create-collection-btn:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

.collections-list {
  margin-bottom: 2rem;
}

.collection-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.collection-item:hover {
  background: var(--tertiary-black);
}

.collection-item.active {
  background: var(--tertiary-black);
  border-color: var(--gold);
}

.collection-item-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.collection-item-info i {
  color: var(--gold);
  font-size: 1.2rem;
}

.collection-details {
  display: flex;
  flex-direction: column;
}

.collection-name {
  font-weight: 500;
}

.collection-count {
  font-size: 0.8rem;
  color: var(--gray-medium);
}

.delete-collection-btn {
  background: none;
  border: none;
  color: var(--gray-medium);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.25rem;
  border-radius: 4px;
  transition: var(--transition);
}

.delete-collection-btn:hover {
  color: #dc3545;
  background: rgba(220, 53, 69, 0.1);
}

.sidebar-subtitle {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--gold);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.recent-books-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.recent-book-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  border-radius: 8px;
  transition: var(--transition);
}

.recent-book-item:hover {
  background: var(--tertiary-black);
}

.recent-book-image {
  width: 40px;
  height: 50px;
  border-radius: 4px;
  overflow: hidden;
  background: var(--tertiary-black);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.recent-book-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.recent-book-info {
  flex: 1;
  overflow: hidden;
}

.recent-book-title {
  font-size: 0.9rem;
  color: var(--white);
  text-decoration: none;
  transition: var(--transition);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.recent-book-title:hover {
  color: var(--gold);
}

.collection-content {
  background: var(--secondary-black);
  border-radius: 16px;
  padding: 2rem;
  border: 1px solid var(--tertiary-black);
  box-shadow: var(--shadow-lg);
}

.select-collection-prompt {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 0;
  color: var(--gray-medium);
  text-align: center;
}

.select-collection-prompt i {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.collection-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--tertiary-black);
}

.collection-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gold);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.collection-stats {
  color: var(--gray-medium);
  font-size: 0.9rem;
}

.empty-collection {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 0;
  color: var(--gray-medium);
  text-align: center;
}

.empty-collection i {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.empty-help {
  font-size: 0.9rem;
  max-width: 400px;
  margin-top: 0.5rem;
}

.collection-books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.collection-book-card {
  display: flex;
  background: var(--tertiary-black);
  border-radius: 12px;
  padding: 1rem;
  border: 1px solid var(--tertiary-black);
  transition: var(--transition);
}

.collection-book-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  border-color: var(--gold);
}

.collection-book-card .book-image {
  width: 80px;
  height: 100px;
  margin: 0;
  margin-left: 1rem;
}

.collection-book-card .book-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.collection-book-card .book-title {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.collection-book-card .book-id {
  font-size: 0.8rem;
  color: var(--gray-medium);
  margin-bottom: 1rem;
}

.collection-book-card .book-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: auto;
}

.remove-book-btn {
  background: var(--tertiary-black);
  color: var(--gray-light);
  border: 1px solid var(--gray-medium);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  font-family: "Heebo", sans-serif;
}

.remove-book-btn:hover {
  background: #dc3545;
  color: var(--white);
  border-color: #dc3545;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  overflow: auto;
  backdrop-filter: blur(5px);
}

.modal-content {
  background: var(--secondary-black);
  border-radius: 16px;
  max-width: 500px;
  width: 90%;
  margin: 10vh auto;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gold);
  animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--tertiary-black);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gold);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.modal-close {
  background: var(--tertiary-black);
  border: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-medium);
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--gold);
  color: var(--primary-black);
}

.modal-body {
  padding: 1.5rem;
}

.modal-subtitle {
  font-size: 1rem;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 1rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1.5rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  font-family: "Heebo", sans-serif;
  border: none;
}

.primary-btn {
  background: var(--gold);
  color: var(--primary-black);
}

.primary-btn:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

.secondary-btn {
  background: var(--tertiary-black);
  color: var(--white);
  border: 1px solid var(--gray-medium);
}

.secondary-btn:hover {
  background: var(--gray-medium);
}

/* Collections Select */
.collections-select-container {
  margin-top: 1.5rem;
}

.collections-select {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 250px;
  overflow-y: auto;
}

.collection-option {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--tertiary-black);
  border-radius: 8px;
  transition: var(--transition);
}

.collection-option:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.collection-option-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.collection-option-info i {
  color: var(--gold);
}

.add-to-collection-btn {
  background: var(--gold);
  color: var(--primary-black);
  border: none;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  font-family: "Heebo", sans-serif;
}

.add-to-collection-btn:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

/* Save Book Preview */
.save-book-preview {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--tertiary-black);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.preview-image {
  width: 60px;
  height: 80px;
  border-radius: 4px;
  overflow: hidden;
  background: var(--tertiary-black);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.preview-info {
  flex: 1;
}

.preview-info h4 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.preview-info p {
  font-size: 0.9rem;
  color: var(--gray-medium);
}

/* Book Card Actions */
.book-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.save-book-btn {
  background: var(--tertiary-black);
  color: var(--white);
  border: 1px solid var(--gold);
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
  font-family: "Heebo", sans-serif;
}

.save-book-btn:hover {
  background: var(--gold);
  color: var(--primary-black);
}

/* Loading Indicators */
.loading-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
  color: var(--gray-medium);
}

.spinner-small {
  width: 30px;
  height: 30px;
  border: 3px solid var(--tertiary-black);
  border-top: 3px solid var(--gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 0.75rem;
}

/* Success Notification */
.notification {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--tertiary-black);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transition: opacity 0.3s ease;
  max-width: 350px;
  border-right: 4px solid;
}

.success-notification {
  border-right-color: #28a745;
}

.error-notification {
  border-right-color: #dc3545;
}

.notification i {
  font-size: 1.2rem;
}

.success-notification i {
  color: #28a745;
}

.error-notification i {
  color: #dc3545;
}

.empty-recent {
  color: var(--gray-medium);
  font-size: 0.9rem;
  text-align: center;
  padding: 1rem 0;
}

/* Error Message */
.error-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
  color: #dc3545;
  text-align: center;
}

.error-message i {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

/* Load More Button */
.load-more-container {
  text-align: center;
  margin: 2rem 0;
}

.load-more-btn {
  background: var(--gold);
  color: var(--primary-black);
  border: none;
  border-radius: 12px;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: var(--transition);
  margin: 0 auto;
  font-family: "Heebo", sans-serif;
}

.load-more-btn:hover:not(:disabled) {
  background: var(--gold-light);
  transform: translateY(-2px);
}

.load-more-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* Save Button States */
.save-book-btn.saved {
  background: #28a745;
  color: var(--white);
  border-color: #28a745;
}

.save-book-btn.saved:hover {
  background: #218838;
  color: var(--white);
}

/* Notification variations */
.info-notification {
  border-right-color: #17a2b8;
}

.info-notification i {
  color: #17a2b8;
}

/* Loading indicator improvements */
.loading-indicator {
  display: none;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  color: var(--gray-medium);
}

/* Responsive adjustments for collections */
@media (max-width: 768px) {
  .collections-container {
    grid-template-columns: 1fr;
  }

  .collection-books-grid {
    grid-template-columns: 1fr;
  }

  .modal-content {
    width: 95%;
  }
}

/* Add to existing navbar styles */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 30px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.hamburger-line {
  width: 100%;
  height: 3px;
  background-color: white;
  border-radius: 3px;
  transition: all 0.3s ease;
  transform-origin: center;
}

/* Hamburger animation when active */
.nav-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile styles */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    right: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--tertiary-black) 50%, var(--gold) 100%);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 2rem;
    transition: right 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    width: 90%;
    max-width: 300px;
    margin: 0.5rem 0;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    justify-content: flex-start;
    font-size: 1.1rem;
    transition: all 0.3s ease;
  }

  .nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-5px);
  }

  .nav-link i {
    margin-left: 1rem;
    font-size: 1.2rem;
  }

  /* Hide menu when clicking outside */
  .nav-menu.active ~ .main-content::before {
    content: "";
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
  }
}

/* Tablet styles */
@media (max-width: 1024px) and (min-width: 769px) {
  .nav-container {
    padding: 0 1.5rem;
  }

  .nav-link span {
    font-size: 0.9rem;
  }
}

/* Small mobile devices */
@media (max-width: 480px) {
  .navbar {
    height: 60px;
  }

  .nav-brand span {
    font-size: 1.2rem;
  }

  .nav-logo {
    width: 30px;
    height: 30px;
  }

  .nav-menu {
    top: 60px;
    height: calc(100vh - 60px);
  }

  .nav-link {
    padding: 0.8rem 1.2rem;
    font-size: 1rem;
  }
}

/* Upload Page Styles */
.upload-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

.upload-header {
  text-align: center;
  margin-bottom: 3rem;
}

.upload-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.upload-header h1 i {
  color: var(--gold);
  font-size: 2.2rem;
}

.upload-header p {
  font-size: 1.2rem;
  color: var(--gray-medium);
  max-width: 600px;
  margin: 0 auto;
}

.upload-form-container {
  background: var(--secondary-black);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--tertiary-black);
  margin-bottom: 3rem;
}

.upload-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-weight: 600;
  color: var(--white);
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-label i {
  color: var(--gold);
  font-size: 1.1rem;
}

.form-input {
  padding: 1rem;
  border: 2px solid var(--tertiary-black);
  border-radius: 12px;
  background: var(--tertiary-black);
  color: var(--white);
  font-size: 1rem;
  font-family: "Heebo", sans-serif;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.form-input::placeholder {
  color: var(--gray-medium);
}

.file-upload-group {
  grid-column: 1 / -1;
}

.file-upload-area {
  border: 2px dashed var(--tertiary-black);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  background: var(--tertiary-black);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}

.file-upload-area:hover {
  border-color: var(--gold);
  background: rgba(212, 175, 55, 0.05);
}

.file-upload-area.dragover {
  border-color: var(--gold);
  background: rgba(212, 175, 55, 0.1);
  transform: scale(1.02);
}

.file-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.file-upload-content i {
  font-size: 3rem;
  color: var(--gold);
  margin-bottom: 1rem;
  display: block;
}

.upload-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.upload-hint {
  color: var(--gray-medium);
  font-size: 0.9rem;
}

.file-preview {
  background: var(--tertiary-black);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  border: 2px solid var(--gold);
}

.file-preview img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 8px;
}

.file-info {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.file-info span {
  color: var(--white);
  font-weight: 600;
}

.remove-file-btn {
  background: var(--gold);
  color: var(--primary-black);
  border: none;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.remove-file-btn:hover {
  background: var(--gold-light);
  transform: scale(1.1);
}

.form-actions {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
}

.btn-primary, .btn-secondary {
  padding: 1rem 2rem;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: "Heebo", sans-serif;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
  color: var(--primary-black);
  flex: 1;
  justify-content: center;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(212, 175, 55, 0.3);
}

.btn-primary:disabled {
  background: var(--gray-medium);
  color: var(--gray-dark);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: var(--tertiary-black);
  color: var(--white);
  border: 2px solid var(--gray-medium);
}

.btn-secondary:hover {
  background: var(--gray-medium);
  border-color: var(--white);
  transform: translateY(-2px);
}

.upload-guidelines {
  background: var(--secondary-black);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--tertiary-black);
}

.upload-guidelines h3 {
  font-size: 1.5rem;
  color: var(--white);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.upload-guidelines h3 i {
  color: var(--gold);
}

.guidelines-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.guideline-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: var(--tertiary-black);
  border-radius: 12px;
  border: 1px solid rgba(212, 175, 55, 0.1);
}

.guideline-item i {
  color: var(--gold);
  font-size: 1.5rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.guideline-item h4 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.guideline-item p {
  color: var(--gray-medium);
  font-size: 0.9rem;
  line-height: 1.4;
}

.message-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.message-content {
  background: var(--secondary-black);
  border-radius: 20px;
  padding: 2rem;
  text-align: center;
  max-width: 400px;
  width: 90%;
  border: 2px solid var(--gold);
  box-shadow: var(--shadow-lg);
}

.message-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.message-icon.success {
  color: #28a745;
}

.message-icon.error {
  color: #dc3545;
}

.message-content h3 {
  color: var(--white);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.message-content p {
  color: var(--gray-medium);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

/* Responsive Design for Upload Page */
@media (max-width: 768px) {
  .upload-container {
    padding: 1rem;
  }
  
  .upload-header h1 {
    font-size: 2rem;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .upload-form-container {
    padding: 1.5rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .btn-primary, .btn-secondary {
    justify-content: center;
  }
  
  .guidelines-grid {
    grid-template-columns: 1fr;
  }
  
  .file-upload-area {
    padding: 1.5rem;
  }
  
  .file-upload-content i {
    font-size: 2.5rem;
  }
}

/* Error Page Styles */
.error-container {
  max-width: 600px;
  margin: 4rem auto;
  padding: 2rem;
  text-align: center;
}

.error-content {
  background: var(--secondary-black);
  border-radius: 20px;
  padding: 3rem 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--tertiary-black);
}

.error-icon {
  font-size: 4rem;
  color: #dc3545;
  margin-bottom: 1.5rem;
}

.error-title {
  font-size: 2rem;
  color: var(--white);
  margin-bottom: 1rem;
  font-weight: 700;
}

.error-message {
  color: var(--gray-medium);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.error-btn {
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
  color: var(--primary-black);
  padding: 1rem 2rem;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.error-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(212, 175, 55, 0.3);
  text-decoration: none;
  color: var(--primary-black);
}

/* Autocomplete Styles */
.autocomplete-container {
  position: relative;
}

.book-select-btn {
  background: var(--secondary-black) !important;
  border: 2px solid var(--tertiary-black) !important;
  cursor: pointer !important;
  transition: var(--transition) !important;
}

.book-select-btn:hover {
  border-color: var(--gold) !important;
  background: var(--tertiary-black) !important;
}

.book-select-btn i {
  color: var(--gray-medium);
}

.autocomplete-suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--secondary-black);
  border: 2px solid var(--tertiary-black);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  max-height: 250px;
  overflow-y: auto;
  z-index: 2001;
}

.suggestion-item {
  padding: 0.75rem 1rem;
  cursor: pointer;
  border-bottom: 1px solid var(--tertiary-black);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.suggestion-item:last-child {
  border-bottom: none;
}

.suggestion-item:hover,
.suggestion-item.highlighted {
  background: var(--tertiary-black);
  border-color: var(--gold);
}

.suggestion-image {
  width: 32px;
  height: 40px;
  object-fit: cover;
  border-radius: 4px;
  background: var(--tertiary-black);
}

.suggestion-details {
  flex: 1;
}

.suggestion-title {
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.25rem;
}

.suggestion-subject {
  font-size: 0.875rem;
  color: var(--gray-medium);
}

.suggestion-loading {
  padding: 1rem;
  text-align: center;
  color: var(--gray-medium);
}

.suggestion-no-results {
  padding: 1rem;
  text-align: center;
  color: var(--gray-medium);
}