:root {
  --primary-color: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --accent: #ec4899;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text-primary: #1e293b;
  --text-secondary: #212730;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --rounded-sm: 0.125rem;
  --rounded: 0.25rem;
  --rounded-md: 0.375rem;
  --rounded-lg: 0.5rem;
  --rounded-xl: 0.75rem;
  --rounded-2xl: 1rem;
  --rounded-full: 9999px;
  --transition: all 0.2s ease-in-out;
}

.dark-mode {
  --primary-color: #818cf8;
  --primary-light: #a5b4fc;
  --primary-dark: #6366f1;
  --accent: #f472b6;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --border-color: #334155;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px -1px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: var(--transition);
  overflow-x: hidden;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Glass Panel Effect */
.glass-panel {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--rounded-xl);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: var(--shadow-lg);
  padding: 1.5rem;
  transition: var(--transition);
}

.dark-mode .glass-panel {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Header Styles */
.cus-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border-color);
}

.dark-mode .cus-header {
  background: rgba(15, 23, 42, 0.8);
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary-dark);
}

.dark-mode .logo {
  color: var(--primary-light);
}

.cus-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.cus-nav a {
  color: var(--text-primary);
  font-weight: 500;
}

.cus-nav a:hover {
  color: var(--primary-color);
}

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

.search-bar input {
  padding: 0.5rem 1rem;
  padding-right: 2.5rem;
  border-radius: var(--rounded-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  transition: var(--transition);
  width: 200px;
}

.search-bar input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
  width: 250px;
}

.search-bar i {
  position: absolute;
  right: 1rem;
  color: var(--text-secondary);
}

.suggestions-box {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--bg-primary);
  border-radius: var(--rounded-md);
  box-shadow: var(--shadow-lg);
  z-index: 10;
  margin-top: 0.5rem;
  max-height: 300px;
  overflow-y: auto;
  display: none;
}

.suggestion-item {
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.suggestion-item:hover {
  background-color: var(--bg-secondary);
}

.no-results, .error {
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* New Animated Navbar */
.new_cos_nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 2rem;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 68px;
  z-index: 999;
}

.dark-mode .new_cos_nav {
  background: rgba(15, 23, 42, 0.7);
}

.nav-buttons {
  display: flex;
  gap: 1rem;
}

.nav-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--rounded-full);
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.nav-button:hover {
  background: var(--bg-secondary);
  transform: translateY(-2px);
}

.dark-mode .nav-button:hover {
  background: var(--bg-tertiary);
}

.nav-icons {
  display: flex;
  gap: 1rem;
}

.nav-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
}

.nav-icon:hover {
  background: var(--bg-secondary);
  transform: scale(1.1);
}

.dark-mode .nav-icon:hover {
  background: var(--bg-tertiary);
}

/* Main Container */
.main-container {
  display: grid;
  grid-template-columns: 250px 1fr 60px;
  min-height: calc(100vh - 136px);
  gap: 1.5rem;
  padding: 1.5rem 2rem;
}

/* Quiz Sidebar */
.quiz-sidebar {
  position: sticky;
  top: 136px;
  height: calc(100vh - 168px);
  overflow-y: auto;
  padding-right: 0.5rem;
}

.quiz-sidebar-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding: 0.5rem 0;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
}

.sidebar-categories {
  list-style: none;
}

.category-item {
  margin-bottom: 0.25rem;
}

.category-link {
  display: block;
  padding: 0.5rem 1rem;
  border-radius: var(--rounded-md);
  color: var(--text-primary);
  transition: var(--transition);
}

.category-link:hover {
  background: var(--bg-secondary);
  color: var(--primary-color);
}

.category-link.active {
  background: var(--primary-color);
  color: white;
}

.dropdown-toggle {
  display: block;
  padding: 0.5rem 1rem;
  border-radius: var(--rounded-md);
  color: var(--text-primary);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.dropdown-toggle:hover {
  background: var(--bg-secondary);
}

.subcategory-list {
  list-style: none;
  padding-left: 1rem;
  margin-top: 0.25rem;
  margin-bottom: 0.75rem;
  border-left: 1px dashed var(--border-color);
}

/* Quiz Main Content */
.quiz-main-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.ai-recommendations {
  margin-bottom: 1rem;
}

.ai-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.quiz-interest-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.recommended-quiz-card {
  position: relative;
  border-radius: var(--rounded-xl);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.recommended-quiz-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.recommended-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-bottom-left-radius: var(--rounded-md);
  font-size: 0.75rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.quiz-card-content {
  padding: 1.5rem;
  background: var(--bg-primary);
}

.quiz-title {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.quiz-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.quiz-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.difficulty-beginner {
  color: var(--success);
}

.difficulty-intermediate {
  color: var(--warning);
}

.difficulty-advanced {
  color: var(--danger);
}

.quiz-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.quiz-creator {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.start-quiz-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--rounded-full);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.start-quiz-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* Quiz Cards */
.quiz-templates-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.quiz-card {
  background: var(--bg-primary);
  border-radius: var(--rounded-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-color);
  position: relative;
}

.quiz-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.quiz-card-header {
  padding: 1.25rem 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.quiz-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.quiz-card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.quiz-card-count {
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: var(--rounded-full);
}

.quiz-card-premium {
  color: var(--accent);
  font-size: 0.875rem;
}

.quiz-card-description {
  padding: 0 1.5rem 1rem;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.quiz-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0 1.5rem 1rem;
}

.quiz-tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--rounded-full);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.tag-new {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.tag-time {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary-color);
}

.tag-difficulty {
  background: rgba(244, 114, 182, 0.1);
  color: var(--accent);
}

.tag-research {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

.quiz-card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.quiz-creator-info {
  display: flex;
  flex-direction: column;
}

.quiz-date {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.psodoname {
  font-size: 0.875rem;
  color: var(--text-primary);
}

.holo-btn {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0));
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.holo-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.collab-badge {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  background: rgba(99, 102, 241, 0.2);
  color: var(--primary-color);
  padding: 0.25rem 0.5rem;
  border-radius: var(--rounded-full);
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  backdrop-filter: blur(5px);
}

/* Filter Panel */
.filter-panel {
  margin-bottom: 1.5rem;
}

.filter-group {
  margin-bottom: 1.5rem;
}

.filter-group-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  font-weight: 500;
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-chip {
  padding: 0.5rem 1rem;
  border-radius: var(--rounded-full);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
}

.filter-chip:hover {
  background: var(--bg-tertiary);
}

.filter-chip.active {
  background: var(--primary-color);
  color: white;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
}

.page-nav, .page-number {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--rounded-full);
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
}

.page-nav.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.page-number.active {
  background: var(--primary-color);
  color: white;
}

.page-number:hover:not(.active), .page-nav:hover:not(.disabled) {
  background: var(--bg-tertiary);
}

.page-ellipsis {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

/* Right Sidebar */
.new_cos_rightsidebar {
  position: sticky;
  top: 136px;
  height: calc(100vh - 168px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
}

.treadmill-stick {
  width: 40px;
  height: 80px;
  background: var(--bg-secondary);
  border-radius: var(--rounded-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 1rem;
}

.treadmill-stick:hover {
  background: var(--bg-tertiary);
}

.treadmill-carpet {
  position: fixed;
  right: -400px;
  top: 136px;
  width: 350px;
  height: calc(100vh - 168px);
  background: var(--bg-primary);
  box-shadow: var(--shadow-xl);
  border-left: 1px solid var(--border-color);
  transition: var(--transition);
  z-index: 999;
  padding: 1.5rem;
  overflow-y: auto;
}

.treadmill-carpet.active {
  right: 60px;
}

.carpet-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.carpet-header h3 {
  font-size: 1.25rem;
}

.empty-carpet {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
}

.empty-carpet i {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.help-item {
  margin-bottom: 1.5rem;
}

.help-item h5 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.help-item p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.sidebar-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--rounded-full);
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
}

.sidebar-icon:hover {
  background: var(--bg-tertiary);
  transform: scale(1.1);
}

.sidebar-sticker {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

/* Account Sidebar */
.offcanvas {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.offcanvas-header {
  border-bottom: 1px solid var(--border-color);
}

.offcanvas-title {
  font-weight: 600;
}

.account-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 2rem;
}

/* Footer */
.cus-footer {
  background: var(--bg-secondary);
  padding: 3rem 2rem 1.5rem;
  border-top: 1px solid var(--border-color);
}

.cus-footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--primary-color);
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Modals */
.modal-content {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.modal-header {
  border-bottom: 1px solid var(--border-color);
}

.modal-footer {
  border-top: 1px solid var(--border-color);
}

/* Payment Modal */
.payment-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.payment-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.invoice-info table {
  border-collapse: collapse;
}

.invoice-info td {
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.invoice-info tr:first-child td {
  font-weight: 500;
  color: var(--text-primary);
}

.quiz-questions-preview h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.questions-scroll-container {
  max-height: 200px;
  overflow-y: auto;
  padding: 0.5rem;
  background: var(--bg-secondary);
  border-radius: var(--rounded-md);
  margin-bottom: 1rem;
}

.questions-list {
  list-style: none;
}

.questions-list li {
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-color);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.questions-list li:last-child {
  border-bottom: none;
}

.payment-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.payment-table th, .payment-table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.payment-table th {
  font-weight: 500;
  color: var(--text-primary);
}

.payment-options h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.payment-methods {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.payment-method-btn {
  padding: 0.75rem 1rem;
  border-radius: var(--rounded-md);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.payment-method-btn:hover {
  background: var(--bg-tertiary);
}

.payment-method-btn.active {
  background: var(--primary-color);
  color: white;
}

.payment-method-content {
  display: none;
}

.payment-method-content.active {
  display: block;
}

.guest-payment-alert {
  text-align: center;
  padding: 1.5rem;
}

.guest-payment-alert p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

/* Interests Modal */
.interests-container {
  max-height: 400px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.interest-category {
  margin-bottom: 1.5rem;
}

.interest-category h6 {
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  font-weight: 500;
}

.interest-options {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.75rem;
}

.form-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-check-input {
  width: 1rem;
  height: 1rem;
}

.form-check-label {
  font-size: 0.875rem;
  color: var(--text-primary);
}

/* Skeleton Loader */
.skeleton-loader {
  background: var(--bg-secondary);
  border-radius: var(--rounded-md);
  position: relative;
  overflow: hidden;
  height: 120px;
}

.skeleton-loader::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Responsive Adjustments */
@media (max-width: 1024px) {
  .main-container {
    grid-template-columns: 200px 1fr 60px;
  }
  
  .quiz-templates-container {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

/* Responsive Adjustments */
@media (max-width: 1200px) {
  .main-container {
    grid-template-columns: 220px 1fr 60px;
  }
  
  .quiz-templates-container {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
  
  .quiz-interest-container {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (max-width: 992px) {
  .main-container {
    grid-template-columns: 200px 1fr 60px;
    gap: 1rem;
    padding: 1rem;
  }
  
  .quiz-sidebar {
    font-size: 0.9rem;
  }
  
  .category-link, .dropdown-toggle {
    padding: 0.4rem 0.8rem;
  }
  
  .quiz-card-title, .quiz-title {
    font-size: 1rem;
  }
  
  .quiz-card-description, .quiz-description {
    font-size: 0.8rem;
  }
  
  .filter-chip {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }
}

@media (max-width: 768px) {
  .main-container {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
  
  .cus-header {
    padding: 0.75rem 1rem;
  }
  
  .logo {
    font-size: 1.25rem;
  }
  
  .logo img {
    height: 40px !important;
  }
  
  .search-bar input {
    width: 150px;
    padding: 0.4rem 0.8rem;
    padding-right: 2rem;
  }
  
  .search-bar input:focus {
    width: 180px;
  }
  
  .new_cos_nav {
    top: 64px;
    padding: 0.5rem 1rem;
  }
  
  .nav-button span {
    display: none;
  }
  
  .quiz-sidebar {
    position: static;
    height: auto;
    margin-bottom: 1.5rem;
    padding-right: 0;
  }
  
  .new_cos_rightsidebar {
    display: none;
  }
  
  .quiz-templates-container,
  .quiz-interest-container {
    grid-template-columns: 1fr;
  }
  
  .treadmill-carpet {
    width: 300px;
  }
  
  .treadmill-carpet.active {
    right: 0;
  }
  
  .filter-options {
    justify-content: flex-start;
  }
  
  .filter-chip {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
  }
  
  .ai-recommendations {
    padding: 1rem;
  }
}

@media (max-width: 576px) {
  .cus-header {
    flex-direction: column;
    padding: 0.75rem;
    gap: 0.75rem;
  }
  
  .cus-nav {
    width: 100%;
    justify-content: space-between;
    gap: 0.5rem;
    flex-wrap: wrap;
  }
  
  .search-bar {
    order: 1;
    width: 100%;
  }
  
  .search-bar input {
    width: 100%;
  }
  
  .search-bar input:focus {
    width: 100%;
  }
  
  .new_cos_nav {
    position: static;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem;
  }
  
  .nav-buttons {
    width: 100%;
    justify-content: space-between;
  }
  
  .nav-button {
    padding: 0.4rem;
  }
  
  .nav-icons {
    width: 100%;
    justify-content: space-between;
  }
  
  .quiz-card, .recommended-quiz-card {
    border-radius: var(--rounded-lg);
  }
  
  .quiz-card-header, 
  .quiz-card-description,
  .quiz-card-footer {
    padding: 1rem;
  }
  
  .quiz-creator-info {
    font-size: 0.8rem;
  }
  
  .start-quiz-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }
  
  .pagination {
    flex-wrap: wrap;
    gap: 0.25rem;
  }
  
  .page-nav, 
  .page-number, 
  .page-ellipsis {
    width: 32px;
    height: 32px;
    font-size: 0.8rem;
  }
  
  .payment-methods {
    flex-direction: column;
  }
  
  .payment-method-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 400px) {
  .cus-nav a:not(:last-child) {
    display: none;
  }
  
  .nav-button {
    padding: 0.3rem;
  }
  
  .quiz-meta {
    flex-direction: column;
    gap: 0.25rem;
  }
  
  .quiz-footer {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
  
  .filter-chip {
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
  }
}

/*____________________________*/
  .dark-mode .purchesedlist {
    background-color: #1e1e2f;
    color: #ffffff;
  }

  /* Menu Toggle Button - only shows on small screens */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary-dark);
  cursor: pointer;
}

.dark-mode .menu-toggle {
  color: var(--primary-light);
}

/* Responsive styles */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .cus-nav {
    flex-direction: column;
    align-items: flex-start;
    position: relative;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    display: none; 
  }

  .dark-mode .cus-nav {
    background: rgba(15, 23, 42, 0.95);
  }

  .cus-nav.open {
    display: flex;
  }

  .search-bar {
    width: 100%;
    margin-top: 1rem;
  }

  .search-bar input {
    width: 100% !important;
  }
}
/*________________translator_____________*/
  #google_translate_element {
    display: inline-block;
    font-size: 0;
  }


  .goog-te-gadget {
    font-family: inherit !important;
    font-size: 0 !important;
  }


  .goog-logo-link, .goog-te-gadget span {
    display: none !important;
  }


  .goog-te-combo {
    font-size: 12px;
    padding: 4px;
    border-radius: 4px;
    border: 1px solid #ccc;
    background: #fff;
  }