/* Educational Applications Exam Simulator - Modern responsive styles */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-white: #ffffff;
  --color-bg: #f8fafc;
  --color-bg-card: #ffffff;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-900: #0f172a;
  --color-success: #16a34a;
  --color-success-bg: #dcfce7;
  --color-error: #dc2626;
  --color-error-bg: #fee2e2;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 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);
  --radius: 12px;
  --radius-lg: 16px;
  --transition: 0.2s ease;
}

/* الوضع الليلي (الداكن) */
[data-theme="dark"] {
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-primary-light: #60a5fa;
  --color-white: #1e293b;
  --color-bg: #0f172a;
  --color-bg-card: #1e293b;
  --color-gray-100: #334155;
  --color-gray-200: #475569;
  --color-gray-300: #64748b;
  --color-gray-500: #94a3b8;
  --color-gray-600: #64748b;
  --color-gray-700: #cbd5e1;
  --color-gray-900: #f1f5f9;
  --color-success: #4ade80;
  --color-success-bg: #166534;
  --color-error: #f87171;
  --color-error-bg: #7f1d1d;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Tajawal', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  color: var(--color-gray-900);
  line-height: 1.7;
  min-height: 100vh;
  direction: rtl;
  text-align: right;
  transition: background-color 0.25s ease, color 0.25s ease;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--transition);
}

.logo:hover {
  opacity: 0.8;
}

.logo-img {
  height: 50px;
  width: auto;
  display: block;
}

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

.theme-toggle {
  padding: 0.5rem 0.75rem;
  min-height: 44px;
}

.theme-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.theme-icon-sun {
  display: none;
}

.theme-icon-moon {
  display: inline;
}

[data-theme="dark"] .theme-icon-sun {
  display: inline;
}

[data-theme="dark"] .theme-icon-moon {
  display: none;
}

.nav-link {
  color: var(--color-gray-700);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

.nav-link:hover {
  background: var(--color-gray-100);
  color: var(--color-primary);
}

/* User Menu Dropdown */
.header {
  position: relative;
}

.user-menu-toggle {
  position: relative;
  padding: 0.5rem 0.75rem;
  min-height: 44px;
}

/* Notifications */
.notifications-toggle {
  position: relative;
  padding: 0.5rem 0.75rem;
  min-height: 44px;
}

.notification-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  background: #ef4444;
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
  line-height: 1;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.notification-badge.hidden {
  display: none;
}

.notifications-dropdown {
  position: absolute;
  top: 100%;
  left: 1rem;
  margin-top: 0.5rem;
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  width: 360px;
  max-width: calc(100vw - 2rem);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  overflow: hidden;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.notifications-dropdown.hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  pointer-events: none;
}

.notifications-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
}

.notifications-header h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

.notifications-list {
  max-height: 400px;
  overflow-y: auto;
}

.notifications-empty {
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--color-text-secondary);
}

.notifications-empty svg {
  margin-bottom: 1rem;
}

.notifications-empty p {
  margin: 0;
  font-size: 0.95rem;
}

.notification-item {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background 0.2s ease;
  cursor: pointer;
}

.notification-item:hover {
  background: rgba(99, 102, 241, 0.05);
}

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

.notification-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.notification-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.notification-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  margin: 0;
}

.notification-details {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.notification-progress {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.notification-time {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.notification-actions {
  display: flex;
  gap: 0.5rem;
}

.notification-btn {
  flex: 1;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.notification-btn-primary {
  background: var(--color-primary);
  color: white;
}

.notification-btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.notification-btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.notification-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
}

.user-menu-dropdown {
  position: absolute;
  top: 100%;
  left: 1rem;
  margin-top: 0.5rem;
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius);
  min-width: 220px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  overflow: hidden;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.user-menu-dropdown.hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  pointer-events: none;
}

.user-menu-header {
  padding: 1rem;
  border-bottom: 1px solid var(--color-gray-100);
  text-align: center;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
}

.user-name {
  color: var(--color-gray-900);
  font-weight: 700;
  font-size: 1rem;
  display: block;
}

.user-menu-item {
  display: block;
  width: 100%;
  padding: 0.875rem 1.25rem;
  text-align: right;
  background: none;
  border: none;
  color: var(--color-gray-700);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  font-size: 0.95rem;
  font-family: inherit;
  font-weight: 500;
}

.user-menu-item:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
}

.user-menu-logout {
  border-top: 1px solid var(--color-gray-100);
  color: var(--color-error);
}

.user-menu-logout:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

.auth-only { 
  display: none !important; 
}
.guest-only { 
  display: inline-flex !important; 
}
body.auth .auth-only { 
  display: inline-flex !important; 
}
body.auth .guest-only { 
  display: none !important; 
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  min-height: 44px;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-primary);
  /* always use bright text on primary buttons for readability */
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

#exam-next:disabled {
  pointer-events: none;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

/* study lecture detail buttons spacing */
.topic-actions {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
}

.topic-card small {
  display: block;
  font-size: 0.85rem;
  color: var(--color-gray-500);
}


.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-200);
}

.btn-ghost {
  background: transparent;
  color: var(--color-gray-700);
}

.btn-ghost:hover {
  background: var(--color-gray-100);
}

.btn-block { width: 100%; }
.btn-lg { padding: 0.875rem 1.75rem; font-size: 1.0625rem; }

.btn-card {
  min-width: 140px;
  padding: 1rem 1.5rem;
  background: var(--color-bg-card);
  border: 2px solid var(--color-gray-200);
  color: var(--color-gray-900);
}

.btn-card:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--shadow);
}

.btn-card.selected {
  border-color: var(--color-primary);
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-primary);
}

/* Views */
.view {
  display: none;
  flex: 1;
  padding: 1.5rem;
  animation: fadeIn 0.3s ease;
}

.view-active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Home */
.hero {
  text-align: center;
  padding: 2rem 1rem 1.5rem;
}

.hero-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--color-gray-900);
  margin: 0 0 0.5rem;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-gray-500);
  margin: 0;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto 2rem;
  padding: 0 1rem;
}

.mode-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid var(--color-gray-100);
}

.mode-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

/* الوضع الاحترافي */
.mode-card-pro {
  position: relative;
  border: 2px solid #f59e0b;
  background: linear-gradient(135deg, #1e293b 0%, #1c1917 100%);
  overflow: hidden;
}

.mode-card-pro::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(245,158,11,0.08) 0%, rgba(239,68,68,0.08) 100%);
  pointer-events: none;
}

.mode-card-pro:hover {
  border-color: #fbbf24;
  box-shadow: 0 8px 30px rgba(245,158,11,0.25);
  transform: translateY(-4px);
}

.mode-card-pro .card-title {
  color: #fbbf24;
}

.mode-card-pro .card-desc {
  color: #94a3b8;
}

.pro-badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background: linear-gradient(90deg, #f59e0b, #ef4444);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  letter-spacing: 0.05em;
}

/* Pro Setup Screen */
.pro-setup {
  max-width: 500px;
  margin: 0 auto;
  padding: 1.5rem;
}

.pro-setup-header {
  text-align: center;
  margin: 1.5rem 0 2rem;
}

.pro-setup-icon { font-size: 3rem; margin-bottom: 0.5rem; }

.pro-setup-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fbbf24;
  margin: 0 0 0.5rem;
}

.pro-setup-desc {
  color: var(--color-gray-500);
  font-size: 0.95rem;
  margin: 0;
}

.pro-count-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.pro-count-btn {
  background: var(--color-bg-card);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius);
  padding: 1rem;
  font-size: 1rem;
  font-family: inherit;
  font-weight: 600;
  color: var(--color-gray-900);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}

.pro-count-btn:hover {
  border-color: #f59e0b;
  color: #fbbf24;
}

.pro-count-btn.selected {
  border-color: #f59e0b;
  background: rgba(245,158,11,0.1);
  color: #fbbf24;
}

.pro-count-recommended {
  grid-column: span 2;
  border-color: #f59e0b;
}

.recommended-tag {
  font-size: 0.7rem;
  background: linear-gradient(90deg, #f59e0b, #ef4444);
  color: #fff;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  margin-right: 0.4rem;
  vertical-align: middle;
}

.btn-pro {
  width: 100%;
  background: linear-gradient(90deg, #f59e0b, #ef4444);
  color: #fff;
  border: none;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 0.9rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity var(--transition);
}

.btn-pro:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-pro:not(:disabled):hover { opacity: 0.9; }

/* SEO Static Content */
.seo-content {
  max-width: 800px;
  margin: 2.5rem auto 0;
  padding: 0 1rem;
}

.seo-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.seo-header-badge {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.seo-header-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-gray-900);
  margin: 0 0 0.4rem;
}

.seo-header-sub {
  color: var(--color-gray-500);
  font-size: 0.9rem;
  margin: 0;
}

.seo-questions { display: flex; flex-direction: column; gap: 1rem; }

.seo-question {
  background: var(--color-bg-card);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
  padding: 1.25rem;
  border-right: 4px solid var(--color-primary);
}

.seo-q-text {
  font-weight: 600;
  margin: 0 0 0.75rem;
  color: var(--color-gray-900);
  line-height: 1.6;
}

.seo-options {
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.seo-options li {
  color: var(--color-gray-500);
  font-size: 0.9rem;
  padding: 0.2rem 0;
}

.seo-options .seo-correct {
  color: var(--color-success);
  font-weight: 700;
}

.seo-explanation {
  font-size: 0.85rem;
  color: var(--color-gray-500);
  margin: 0;
  padding-top: 0.6rem;
  border-top: 1px solid var(--color-gray-100);
}

.seo-topics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.875rem;
}

.seo-topic {
  background: var(--color-bg-card);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
  padding: 1rem;
  position: relative;
}

.seo-topic-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 0.5rem;
}

.seo-topic h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin: 0 0 0.4rem;
}

.seo-topic p {
  font-size: 0.8rem;
  color: var(--color-gray-500);
  margin: 0;
  line-height: 1.5;
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--color-gray-900);
}

.card-desc {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
  margin: 0;
  line-height: 1.5;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.modal-open {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  cursor: pointer;
}

.modal-content {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-gray-500);
  cursor: pointer;
  line-height: 1;
  padding: 0.25rem;
}

.modal-close:hover {
  color: var(--color-gray-900);
}

.auth-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.auth-tab {
  flex: 1;
  padding: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  background: var(--color-gray-100);
  border: none;
  border-radius: var(--radius);
  color: var(--color-gray-500);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.auth-tab.auth-tab-active {
  background: var(--color-primary);
  color: #ffffff; /* keep text light even in dark mode */
}

.auth-form input {
  width: 100%;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.auth-form input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.auth-error {
  color: var(--color-error);
  font-size: 0.875rem;
  margin: 0 0 1rem;
  min-height: 1.25rem;
}

.auth-link {
  text-align: center;
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

.auth-link a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition);
}

.auth-link a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.auth-modal-content .btn-block {
  margin-top: 0.5rem;
}

.hidden { display: none !important; }

/* Dashboard */
.dashboard {
  max-width: 800px;
  margin: 0 auto;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 1.5rem;
  color: var(--color-gray-900);
}

.page-subtitle {
  color: var(--color-gray-500);
  margin: 0 0 1.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  text-align: center;
  border: 1px solid var(--color-gray-100);
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

.dashboard-section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 1rem;
  color: var(--color-gray-900);
}

/* Contact Page */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 2rem 0;
}

.contact-form-section h2,
.contact-info h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--color-gray-900);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--color-gray-700);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-details {
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-item svg {
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.contact-item strong {
  display: block;
  color: var(--color-gray-900);
  margin-bottom: 0.25rem;
}

.contact-item p {
  margin: 0;
  color: var(--color-gray-600);
}

.contact-item a {
  color: var(--color-primary);
  text-decoration: none;
}

.contact-item a:hover {
  text-decoration: underline;
}

.contact-social h3 {
  margin-bottom: 1rem;
  color: var(--color-gray-900);
}

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

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-gray-100);
  border-radius: 50%;
  color: var(--color-gray-600);
  transition: all var(--transition);
}

.social-link:hover {
  background: var(--color-primary);
  color: white;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.exams-list {
  margin-bottom: 1.5rem;
}

.exams-list-empty {
  color: var(--color-gray-500);
  font-size: 0.9375rem;
  margin: 0;
}

.exam-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 1.25rem;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  margin-bottom: 0.75rem;
}

.exam-list-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.exam-list-date {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
}

.exam-list-score {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-gray-900);
}

.exam-review-btn {
  flex-shrink: 0;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  min-height: 36px;
}

.dashboard-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Study */
.study {
  max-width: 800px;
  margin: 0 auto;
}

.study-nav-buttons {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  transition: all 0.2s ease;
}

.back-btn svg {
  transition: transform 0.2s ease;
}

.back-btn:hover svg {
  transform: translateX(3px);
}

#btn-study-home:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
}

/* Lecture Quiz Setup */
.lecture-quiz-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.quiz-info-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-gray-100);
}

.quiz-info-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.quiz-info-content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.quiz-info-label {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

.quiz-info-value {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-gray-900);
}

.lecture-quiz-options {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  justify-content: center;
}

.lecture-quiz-options .btn-card {
  flex: 1;
  min-width: 140px;
}

#btn-start-lecture-quiz {
  display: block;
  margin: 0 auto;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

/* Modern Topic Cards */
.topic-card-modern {
  background: var(--card-gradient, linear-gradient(135deg, #667eea 0%, #764ba2 100%));
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 100px;
}

.topic-card-modern::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.2);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.topic-card-modern:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.topic-card-modern:hover::before {
  opacity: 1;
}

.topic-card-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
  z-index: 1;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.topic-card-content {
  flex: 1;
  z-index: 1;
}

.topic-card-title {
  margin: 0 0 0.4rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: #ffffff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.topic-card-subtitle {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.9);
}

.topic-card-stats {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.topic-stat {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.95);
  font-weight: 500;
}

.topic-stat svg {
  opacity: 0.9;
}

.topic-card-arrow {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.8);
  z-index: 1;
  transition: transform 0.3s ease;
}

.topic-card-modern:hover .topic-card-arrow {
  transform: translateX(-5px);
}

/* Topic Detail Sections */
.topic-section {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--color-primary);
}

.topic-section-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topic-section-content {
  line-height: 1.8;
  color: var(--color-gray-700);
  margin: 0;
}

/* PDF Modal */
.pdf-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.pdf-modal.pdf-modal-open {
  opacity: 1;
}

.pdf-modal.pdf-modal-closing {
  opacity: 0;
}

.pdf-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(5px);
}

.pdf-modal-content {
  position: relative;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 900px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.pdf-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-gray-100);
}

.pdf-modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--color-gray-900);
}

.pdf-modal-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pdf-zoom-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  min-width: 36px;
  border: none;
}

.pdf-zoom-level {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-gray-700);
  min-width: 50px;
  text-align: center;
}

.pdf-download-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  text-decoration: none;
}

.pdf-modal-close {
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--color-gray-700);
  cursor: pointer;
  padding: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.pdf-modal-close:hover {
  background: var(--color-gray-100);
  color: var(--color-error);
}

.pdf-container {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  background: #525659;
}

.pdf-page {
  display: block;
  margin: 0 auto 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border-radius: 4px;
}

.pdf-loading,
.pdf-error {
  text-align: center;
  padding: 3rem;
  color: var(--color-gray-500);
  font-size: 1.125rem;
}

.pdf-error {
  color: var(--color-error);
}

.topic-content {
  margin-bottom: 1.5rem;
}

/* Practice */
.practice {
  max-width: 640px;
  margin: 0 auto;
}

.practice-options {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  justify-content: center;
}

.practice-options .btn-card {
  flex: 1;
  min-width: 120px;
}

.practice #btn-start-practice {
  display: block;
  margin: 0 auto 2rem;
}

.progress-bar {
  height: 6px;
  background: var(--color-gray-200);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width var(--transition);
}

.progress-text {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
  margin: 0 0 1rem;
}

.question-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
  border: 1px solid var(--color-gray-200);
}

.question-text {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 1.5rem;
  color: var(--color-gray-900);
  line-height: 1.7;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-gray-200);
}

.options {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-family: inherit;
  text-align: right;
  background: var(--color-bg-card);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.15s ease, box-shadow 0.18s ease;
  min-height: 54px;
  line-height: 1.5;
  color: var(--color-gray-900);
  position: relative;
}

/* Option letter badge */
.option-btn::before {
  content: attr(data-index);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-gray-200);
  color: var(--color-gray-600);
  font-size: 0.8rem;
  font-weight: 700;
  transition: background 0.18s ease, color 0.18s ease;
}

.option-btn:hover:not(:disabled) {
  background: rgba(99, 102, 241, 0.06);
  border-color: var(--color-primary-light);
  transform: translateX(-2px);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.12);
}

.option-btn:hover:not(:disabled)::before {
  background: var(--color-primary);
  color: #fff;
}

.option-btn.selected {
  border-color: var(--color-primary);
  background: rgba(99, 102, 241, 0.1);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.option-btn.selected::before {
  background: var(--color-primary);
  color: #fff;
}

.option-btn.correct {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  color: var(--color-success);
  font-weight: 600;
}

.option-btn.correct::before {
  background: var(--color-success);
  color: #fff;
  content: '✓';
}

.option-btn.wrong {
  border-color: var(--color-error);
  background: var(--color-error-bg);
  color: var(--color-error);
  font-weight: 600;
}

.option-btn.wrong::before {
  background: var(--color-error);
  color: #fff;
  content: '✗';
}

.option-btn:disabled {
  cursor: default;
  opacity: 0.9;
  transform: none;
}

.feedback {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.feedback-result {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.feedback-result.correct { color: var(--color-success); }
.feedback-result.wrong { color: var(--color-error); }

.correct-answer, .explanation {
  margin: 0.5rem 0;
  font-size: 0.9375rem;
  color: var(--color-gray-700);
}

.explanation {
  padding: 0.75rem;
  background: var(--color-gray-100);
  border-radius: var(--radius);
  margin-top: 0.75rem;
}

/* feedback-card — used in leadership practice */
.feedback-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin-top: 1rem;
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.feedback-card .feedback-result {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0;
}

.feedback-card .correct-answer {
  font-size: 0.95rem;
  color: var(--color-gray-700);
  margin: 0;
}

.feedback-card .explanation {
  font-size: 0.9rem;
  color: var(--color-gray-600);
  background: var(--color-gray-100);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin: 0;
}

/* Exam */
.exam {
  max-width: 800px;
  margin: 0 auto;
}

/* Exam Instructions */
.exam-instructions {
  max-width: 600px;
  margin: 0 auto;
  padding: 1rem;
}

.instructions-container {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

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

.instructions-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.instructions-subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
}

.instructions-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
  text-align: right;
}

.instruction-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border-right: 3px solid var(--color-primary);
}

.instruction-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.instruction-text h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.25rem 0;
  color: var(--color-text);
}

.instruction-text p {
  font-size: 0.875rem;
  margin: 0;
  color: var(--color-text-secondary);
}

.instructions-warning {
  background: rgba(255, 193, 7, 0.1);
  border: 1px solid rgba(255, 193, 7, 0.3);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
  color: var(--color-text);
  font-size: 0.9rem;
}

.instructions-warning strong {
  color: #ffc107;
}

/* Exam Quiz */
.exam-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 0.875rem 1.25rem;
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

.exam-timer {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  background: rgba(99, 102, 241, 0.08);
  padding: 0.35rem 0.875rem;
  border-radius: var(--radius);
}

.exam-timer.warning {
  color: var(--color-error);
  background: rgba(220, 38, 38, 0.08);
}

/* Question Navigator (circles) */
.exam-navigator {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.exam-navigator-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.exam-nav-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid var(--color-gray-300);
  background: var(--color-bg);
  color: var(--color-text-secondary);
}

.exam-nav-circle:hover:not(.disabled) {
  transform: scale(1.1);
  border-color: var(--color-primary);
}

.exam-nav-circle.current {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  transform: scale(1.15);
}

.exam-nav-circle.answered {
  border-color: var(--color-success);
  background: var(--color-success);
  color: #ffffff;
}

.exam-nav-circle.answered:not(.current) {
  opacity: 0.8;
}

.exam-nav-circle.disabled {
  opacity: 0.3;
  cursor: not-allowed;
  border-color: var(--color-gray-200);
  background: var(--color-gray-100);
}

.exam-nav-circle.disabled:hover {
  transform: none;
  border-color: var(--color-gray-200);
}

.exam-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.exam-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  flex: 1;
  justify-content: center;
}

.exam-grid-btn {
  width: 40px;
  height: 40px;
  padding: 0;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid var(--color-gray-200);
  background: var(--color-white);
  color: var(--color-gray-700);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.exam-grid-btn:hover {
  border-color: var(--color-primary);
}

.exam-grid-btn.current {
  border-color: var(--color-primary);
  background: var(--color-primary);
  /* ensure legible number even in dark mode */
  color: #ffffff;
}

.exam-grid-btn.answered {
  border-color: var(--color-gray-400);
  background: var(--color-gray-100);
}

/* Result */
.result {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.result-container {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
}

.result-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  animation: scaleIn 0.5s ease-out;
}

.result-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.result-score-big {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.result-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.result-stat-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.2s ease;
}

.result-stat-card:hover {
  transform: translateY(-2px);
}

.result-stat-card.success {
  border-top: 3px solid var(--color-success);
}

.result-stat-card.error {
  border-top: 3px solid var(--color-danger);
}

.result-stat-card.primary {
  border-top: 3px solid var(--color-primary);
}

.result-stat-icon {
  font-size: 1.25rem;
  font-weight: 700;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.result-stat-card.success .result-stat-icon {
  color: var(--color-success);
}

.result-stat-card.error .result-stat-icon {
  color: var(--color-danger);
}

.result-stat-card.primary .result-stat-icon {
  color: var(--color-primary);
}

.result-stat-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
}

.result-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}

.result-stat-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.result-message {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
  width: 100%;
}

.result-page {
  display: flex;
  justify-content: center;
  padding: 1.5rem 1rem 5rem;
}

.result-container {
  width: 100%;
  max-width: 480px;
  text-align: center;
}

.result-actions .btn {
  width: 100%;
}

@keyframes scaleIn {
  from {
    transform: scale(0);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* Responsive adjustments for mobile */
@media (max-width: 480px) {
  .result-container {
    padding: 1rem;
  }
  
  .result-icon {
    font-size: 2rem;
  }
  
  .result-title {
    font-size: 1.1rem;
  }
  
  .result-score-big {
    font-size: 1.75rem;
  }
  
  .result-stats-grid {
    gap: 0.5rem;
  }
  
  .result-stat-card {
    padding: 0.5rem;
  }
  
  .result-stat-icon {
    width: 28px;
    height: 28px;
    font-size: 1rem;
  }
  
  .result-stat-value {
    font-size: 1.25rem;
  }
  
  .result-stat-label {
    font-size: 0.7rem;
  }
  
  .result-message {
    font-size: 0.875rem;
    padding: 0.5rem;
  }
  
  /* Exam instructions */
  .instructions-container {
    padding: 1.25rem;
  }
  
  .instructions-icon {
    font-size: 2rem;
  }
  
  .instructions-title {
    font-size: 1.35rem;
  }
  
  .instruction-item {
    padding: 0.75rem;
  }
  
  .instruction-icon {
    font-size: 1.25rem;
  }
  
  .instruction-text h3 {
    font-size: 0.9rem;
  }
  
  .instruction-text p {
    font-size: 0.8rem;
  }
  
  /* Exam navigator */
  .exam-navigator {
    padding: 0.75rem;
  }
  
  .exam-nav-circle {
    width: 32px;
    height: 32px;
    font-size: 0.8rem;
  }
  
  .exam-timer {
    font-size: 1.25rem;
  }
}

/* Old result styles (kept for backward compatibility) */
.result-score {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.result-stats {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  text-align: right;
}

.result-stats p {
  margin: 0.5rem 0;
}

/* Review */
.review {
  max-width: 800px;
  margin: 0 auto;
}

.review-item {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--color-gray-200);
}

.review-item.correct {
  border-left-color: var(--color-success);
}

.review-item.wrong {
  border-left-color: var(--color-error);
}

.review-item h3 {
  font-size: 1rem;
  margin: 0 0 0.75rem;
  font-weight: 600;
  color: var(--color-gray-900);
}

.review-item .user-answer, .review-item .correct-answer, .review-item .explanation {
  font-size: 0.9375rem;
  margin: 0.25rem 0;
}

.review-item .user-answer.wrong { color: var(--color-error); }
.review-item .correct-answer { color: var(--color-success); }

/* Responsive */
@media (max-width: 640px) {
  .header {
    padding: 0.75rem 1rem;
  }

  .nav {
    gap: 0.5rem;
  }

  .nav-link {
    padding: 0.5rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
    padding: 0;
  }

  .practice-options {
    flex-direction: column;
  }

  .practice-options .btn-card {
    min-width: 100%;
  }

  .exam-header {
    flex-direction: column;
    align-items: stretch;
  }

  .exam-timer {
    text-align: center;
  }

  .exam-nav {
    flex-direction: column;
  }

  .exam-grid-btn {
    width: 36px;
    height: 36px;
    font-size: 0.75rem;
  }
}

/* Loading Spinner */
.loading-spinner {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.loading-spinner.hidden {
  display: none;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-spinner p {
  margin-top: 1rem;
  color: var(--color-white);
  font-weight: 500;
  font-size: 1rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
  max-width: 90%;
  width: 400px;
}

.toast {
  background: var(--color-white);
  color: var(--color-gray-900);
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideDown 0.3s ease, fadeOut 0.3s ease 2.7s;
  pointer-events: auto;
  border-right: 4px solid var(--color-primary);
}

.toast.toast-success {
  border-right-color: var(--color-success);
}

.toast.toast-error {
  border-right-color: var(--color-error);
}

.toast.toast-warning {
  border-right-color: #f59e0b;
}

.toast-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.toast-message {
  flex: 1;
  font-size: 0.95rem;
  line-height: 1.4;
}

/* Achievement Toast */
.toast-achievement {
  border-right-color: #f59e0b;
  background: linear-gradient(135deg, #1e293b, #1c1917);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
}

.toast-ach-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.toast-ach-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.toast-ach-text strong {
  color: #fbbf24;
  font-size: 0.9rem;
}

.toast-ach-text span {
  color: var(--color-gray-500);
  font-size: 0.8rem;
}

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

@keyframes fadeOut {
  to {
    opacity: 0;
    transform: translateY(-10px);
  }
}

/* Progress Indicator for Exam */
.exam-progress-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  background: var(--color-gray-100);
  border-radius: var(--radius);
}

.exam-progress-stats {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.exam-progress-stats span {
  color: var(--color-gray-700);
}

.exam-progress-stats strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* Responsive improvements */
@media (max-width: 768px) {
  .header {
    padding: 0.75rem 1rem;
  }
  
  .logo-img {
    height: 40px;
  }
  
  .nav {
    gap: 0.25rem;
  }
  
  .nav-link {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .modal-content {
    max-width: 95%;
  }
  
  .toast-container {
    width: 95%;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.5rem;
  }
  
  .hero-subtitle {
    font-size: 0.95rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .exam-progress-stats {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* Dashboard Tabs */
.dashboard-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--color-gray-200);
}

.dashboard-tab {
  padding: 0.75rem 1.5rem;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--color-gray-600);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.dashboard-tab:hover {
  color: var(--color-primary);
  background: var(--color-gray-50);
}

.dashboard-tab.dashboard-tab-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.dashboard-tab-content {
  animation: fadeIn 0.3s ease;
}

/* Analytics - new stats UI */
.analytics-empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-gray-500);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.an-section {
  margin-bottom: 2rem;
}

.an-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.an-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.an-card-correct { border-top: 3px solid var(--color-success); }
.an-card-wrong   { border-top: 3px solid var(--color-error); }

.an-card-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.an-card-label {
  font-size: 0.8rem;
  color: var(--color-gray-500);
}

.an-rate-bar-bg {
  height: 6px;
  background: var(--color-gray-200);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 0.5rem;
}

.an-rate-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: 3px;
  transition: width 0.6s ease;
}

/* Trend chart */
.an-trend-chart {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  height: 140px;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 1rem 0.75rem 0.5rem;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}

.trend-bar-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  flex: 1;
  min-width: 36px;
  height: 100%;
  gap: 0.2rem;
}

.trend-bar {
  width: 100%;
  border-radius: 4px 4px 0 0;
  min-height: 4px;
  transition: height 0.4s ease;
}

.trend-bar-label {
  font-size: 0.65rem;
  color: var(--color-gray-600);
  font-weight: 600;
}

.trend-bar-date {
  font-size: 0.6rem;
  color: var(--color-gray-400);
  white-space: nowrap;
}



/* Daily Question Modal */
.daily-modal-content {
  max-width: 480px;
  width: 90%;
  padding: 2rem;
  border-radius: calc(var(--radius) * 1.5);
  animation: slideUp 0.35s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.daily-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.daily-question-badge {
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.25rem 0.85rem;
  border-radius: 20px;
}

.daily-question-date {
  font-size: 0.8rem;
  color: var(--color-gray-500);
}

.daily-question-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.daily-question-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.daily-opt-btn {
  background: var(--color-bg);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
  text-align: right;
  font-size: 0.95rem;
  color: var(--color-gray-800);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  font-family: inherit;
}

.daily-opt-btn:hover:not([disabled]) {
  border-color: var(--color-primary);
  background: rgba(99,102,241,0.08);
}

.daily-opt-btn.correct {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  color: var(--color-success);
  font-weight: 700;
}

.daily-opt-btn.wrong {
  border-color: var(--color-error);
  background: var(--color-error-bg);
  color: var(--color-error);
}

.daily-opt-btn[disabled] { cursor: default; }

.daily-question-feedback {
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.daily-question-feedback.correct {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.daily-question-feedback.wrong {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.daily-question-feedback span {
  font-weight: 700;
  display: block;
  margin-bottom: 0.25rem;
}

.daily-question-feedback p {
  margin: 0.25rem 0 0;
  color: var(--color-gray-700);
}

.daily-modal-close {
  width: 100%;
  margin-top: 0.5rem;
}

/* Dashboard Motivation */
.dashboard-motivation {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-bg-card);
  border-right: 4px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 0.9rem 1.25rem;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  color: var(--color-gray-800);
  box-shadow: var(--shadow-sm);
}
.motivation-emoji { font-size: 1.5rem; }

/* Review Filters */
.review-filters {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.review-filter-btn {
  padding: 0.4rem 1rem;
  border-radius: 20px;
  border: 2px solid var(--color-gray-200);
  background: transparent;
  color: var(--color-gray-600);
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}
.review-filter-btn.active,
.review-filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(99,102,241,0.08);
}

/* Skeleton Loading */
.skeleton-card {
  pointer-events: none;
}
.skeleton-line {
  display: block;
  height: 1.75rem;
  background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
  border-radius: 6px;
  margin-bottom: 0.5rem;
  width: 60%;
  margin-inline: auto;
}
.skeleton-line.short {
  height: 0.85rem;
  width: 40%;
  margin-bottom: 0;
}
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Footer */
.home-footer {
  margin-top: 1.5rem;
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--color-gray-200);
  text-align: center;
}
.footer-content {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}
.footer-brand {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-gray-700);
  margin: 0;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
  justify-content: center;
  margin: 0;
}
.footer-links a {
  font-size: 0.78rem;
  color: var(--color-gray-500);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--color-primary); }
.footer-bottom {
  font-size: 0.75rem;
  color: var(--color-gray-400);
  margin: 0;
}
.footer-disclaimer {
  font-size: 0.7rem;
  color: var(--color-gray-400);
  margin: 0;
}


.flashcards-page {
  max-width: 600px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.fc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.fc-counter {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gray-600);
}

.fc-stats {
  display: flex;
  gap: 1rem;
  font-weight: 700;
  font-size: 0.95rem;
}

.fc-stat-know     { color: var(--color-success); }
.fc-stat-dontknow { color: var(--color-error); }

/* Card flip */
.fc-card-wrap {
  perspective: 1000px;
  cursor: pointer;
  margin-bottom: 1.5rem;
  min-height: 220px;
}

.fc-card {
  position: relative;
  width: 100%;
  min-height: 220px;
  transform-style: preserve-3d;
  transition: transform 0.5s ease;
}

.fc-card.flipped {
  transform: rotateY(180deg);
}

.fc-front,
.fc-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 0.75rem;
  border: 2px solid var(--color-gray-100);
}

.fc-back {
  transform: rotateY(180deg);
  border-color: var(--color-primary);
}

.fc-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-400);
}

.fc-front p,
.fc-back p {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-gray-900);
  line-height: 1.6;
  margin: 0;
}

.fc-hint {
  font-size: 0.8rem;
  color: var(--color-gray-400);
  margin-top: auto;
}

.fc-explanation {
  font-size: 0.85rem !important;
  font-weight: 400 !important;
  color: var(--color-gray-500) !important;
  border-top: 1px solid var(--color-gray-200);
  padding-top: 0.5rem;
  margin-top: 0.25rem;
}

/* Action buttons */
.fc-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.fc-btn-dontknow {
  background: var(--color-error-bg);
  color: var(--color-error);
  border: 2px solid var(--color-error);
  padding: 0.85rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: opacity 0.2s;
}

.fc-btn-know {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 2px solid var(--color-success);
  padding: 0.85rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: opacity 0.2s;
}

.fc-btn-dontknow:hover,
.fc-btn-know:hover { opacity: 0.85; }

/* Tips Page */
.tips-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}
.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.tip-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
}
.tip-num {
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.tip-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
  color: var(--color-gray-900);
}
.tip-card p {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  margin: 0;
  line-height: 1.6;
}

/* Bottom Navigation (mobile only) */
.bottom-nav {
  display: none;
}
@media (max-width: 480px) {
  .bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    right: 0;
    left: 0;
    z-index: 200;
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    padding: 0.4rem 0 calc(0.4rem + env(safe-area-inset-bottom));
    justify-content: space-around;
  }
  .bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    color: var(--color-gray-500);
    text-decoration: none;
    font-size: 0.65rem;
    font-weight: 500;
    font-family: inherit;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    transition: color 0.2s;
    min-width: 48px;
    /* reset button styles */
    background: none;
    border: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }
  .bottom-nav-item:hover,
  .bottom-nav-item.active {
    color: var(--color-primary);
  }
  body { padding-bottom: 64px; }
  body:not(.auth) .bottom-nav-item[data-view="dashboard"] { display: none; }
}

/* ===== Mobile UX Improvements ===== */
@media (max-width: 480px) {

  /* كروت الصفحة الرئيسية - أكبر وأسهل للمس */
  .mode-card {
    padding: 1.5rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    text-align: right;
  }
  .card-icon {
    font-size: 2.25rem;
    margin-bottom: 0;
    flex-shrink: 0;
  }
  .card-title { font-size: 1.1rem; margin: 0 0 0.25rem; }
  .card-desc  { font-size: 0.85rem; margin: 0; }

  /* أزرار أكبر للمس */
  .btn { min-height: 44px; }
  .btn-lg { min-height: 52px; font-size: 1rem; }
  .option-btn { min-height: 52px; font-size: 0.95rem; padding: 0.85rem 1rem; }
  .daily-opt-btn { min-height: 48px; }

  /* الهيدر - موبايل: إخفاء روابط النص، الأيقونات تكفي */
  .nav-link { display: none; }
  /* إظهار لوحة التحكم كأيقونة بدل نص */
  .nav-link[data-view="dashboard"] {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    font-size: 0;        /* إخفاء النص */
    min-width: 40px;
    justify-content: center;
  }
  .nav-link[data-view="dashboard"]::before {
    content: "⊞";
    font-size: 1.3rem;
  }

  /* لوحة التحكم */
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .stat-card  { padding: 0.85rem 0.75rem; }
  .stat-value { font-size: 1.5rem; }

  /* الامتحان */
  .exam-header { gap: 0.5rem; }
  .exam-timer  { font-size: 1.4rem; padding: 0.4rem 0.75rem; }
  .question-card { padding: 1rem; }
  .question-text { font-size: 1rem; }

  /* نتيجة الامتحان */
  .result-actions {
    flex-direction: column;
    gap: 0.75rem;
  }
  .result-actions .btn { width: 100%; justify-content: center; }

  /* المراجعة */
  .review-item { padding: 1rem; }
  .review-filters { gap: 0.4rem; }
  .review-filter-btn { padding: 0.4rem 0.75rem; font-size: 0.8rem; }

  /* الـ Dashboard tabs */
  .dashboard-tab { padding: 0.6rem 1rem; font-size: 0.9rem; }

  /* الـ Modal */
  .modal-content { padding: 1.5rem 1.25rem; border-radius: var(--radius) var(--radius) 0 0; }
  .daily-modal-content { border-radius: var(--radius) var(--radius) 0 0; }

  /* تحسين الـ footer */
  .footer-links { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; }
}

/* Ads Styling */
.ad-container {
  margin: 1.5rem auto;
  padding: 0.5rem;
  text-align: center;
  background: var(--color-gray-50);
  border-radius: var(--radius);
  border: 1px dashed var(--color-gray-300);
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-container::before {
  content: 'إعلان';
  position: absolute;
  top: 0.25rem;
  right: 0.5rem;
  font-size: 0.7rem;
  color: var(--color-gray-400);
  text-transform: uppercase;
}

/* Header Ad */
.ad-header {
  margin: 0.5rem auto;
  max-width: 728px;
}

/* Sidebar Ad */
.ad-sidebar {
  position: sticky;
  top: 80px;
  margin: 1rem 0;
}

/* In-content Ad */
.ad-in-content {
  margin: 2rem auto;
  max-width: 336px;
}

/* Interstitial Ad (Full Screen) */
.ad-interstitial-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

.ad-interstitial-content {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 90%;
  max-height: 90%;
  overflow: auto;
}

.ad-interstitial-close {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--color-gray-700);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 10;
}

.ad-interstitial-close:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.ad-interstitial-timer {
  background: var(--color-primary);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 50%;
  font-weight: 700;
  min-width: 24px;
  text-align: center;
}

.ad-interstitial-ad {
  min-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Ad Blocker Message */
.adblocker-message {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1.5rem;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.5s ease;
}

.adblocker-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.adblocker-content h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

.adblocker-content p {
  margin: 0 0 1rem;
  opacity: 0.9;
}

.adblocker-content .btn {
  background: white;
  color: #667eea;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

/* Responsive Ads */
@media (max-width: 768px) {
  .ad-sidebar {
    position: static;
    margin: 1rem auto;
  }
  
  .ad-interstitial-content {
    padding: 1rem;
  }
}

/* Native Ads (blend with content) */
.ad-native {
  background: var(--color-bg-card);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 1rem 0;
  box-shadow: var(--shadow-sm);
}

.ad-native-label {
  font-size: 0.7rem;
  color: var(--color-gray-400);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

/* ========================================
   MODERN LANDING PAGE - About Section
   ======================================== */

/* Landing Page Container */
.landing-page {
  width: 100%;
  background: var(--color-bg);
}

/* Quick Actions Bar */
.quick-actions-bar {
  background: var(--color-bg-card);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.5rem 0;
  box-shadow: var(--shadow);
}

.quick-actions-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.quick-action-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1.05rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.quick-action-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.5);
  border-color: rgba(255, 255, 255, 0.3);
}

.quick-icon {
  font-size: 1.5rem;
}

.quick-text {
  font-size: 1rem;
}

/* Hero Section */
.landing-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 5rem 2rem;
  color: white;
}

.landing-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.landing-text {
  text-align: right;
}

.landing-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  margin: 0 0 1.5rem;
  line-height: 1.2;
}

.landing-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.8;
  margin: 0 0 2rem;
  opacity: 0.95;
}

.landing-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.btn-outline {
  background: transparent;
  border: 2px solid white;
  color: white;
}

.btn-outline:hover {
  background: white;
  color: var(--color-primary);
}

.landing-stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-item strong {
  font-size: 2rem;
  font-weight: 700;
}

.stat-item span {
  font-size: 0.9rem;
  opacity: 0.9;
}

.landing-image {
  position: relative;
}

.landing-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* Features Section */
.features-section {
  padding: 5rem 2rem;
  background: var(--color-bg);
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin: 0 0 3rem;
  color: var(--color-text);
}

.features-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

/* Modern Feature Card */
.feature-card-modern {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.feature-card-modern:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.feature-card-image {
  position: relative;
  width: 100%;
  height: 240px;
  overflow: hidden;
  background: rgba(99, 102, 241, 0.1);
}

.feature-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.feature-card-modern:hover .feature-card-image img {
  transform: scale(1.05);
}

.feature-card-content {
  padding: 2rem;
}

.feature-badge {
  display: inline-block;
  background: var(--color-primary);
  color: white;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.feature-card-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 1rem;
  color: var(--color-text);
}

.feature-card-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin: 0 0 1.5rem;
}

.feature-card-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
}

.feature-card-list li {
  padding: 0.5rem 0;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.feature-card-content .btn {
  width: 100%;
}

/* Extra Features Section */
.extra-section {
  padding: 5rem 2rem;
  background: var(--color-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.extra-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.extra-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.extra-item {
  background: var(--color-bg-card);
  padding: 2rem;
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.extra-item:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.extra-icon {
  font-size: 2.5rem;
}

.extra-text {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
}

/* Landing Footer */
.landing-footer {
  background: var(--color-bg-card);
  color: var(--color-text);
  padding: 3rem 2rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.landing-footer-social {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.landing-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  transition: all var(--transition);
  text-decoration: none;
}

.landing-social-link:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.landing-social-link svg {
  width: 22px;
  height: 22px;
}

.landing-footer p {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--color-text-secondary);
}

.landing-footer strong {
  color: var(--color-primary);
}

.footer-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition);
}

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

.footer-links span {
  color: var(--color-text-secondary);
}

.footer-disclaimer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  font-style: italic;
}

/* Image Placeholder */
.image-placeholder {
  width: 100%;
  height: 100%;
  background: var(--color-gray-100);
  border: 3px dashed var(--color-gray-300);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.image-placeholder:hover {
  border-color: var(--color-primary);
  background: var(--color-gray-50);
}

.placeholder-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  opacity: 0.5;
}

.placeholder-text {
  color: var(--color-gray-500);
  font-size: 0.9rem;
  margin: 0;
}

/* Responsive Design */
@media (max-width: 968px) {
  .landing-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .landing-text {
    text-align: center;
  }
  
  .landing-actions {
    justify-content: center;
  }
  
  .landing-stats {
    justify-content: center;
  }
  
  .features-cards {
    grid-template-columns: 1fr;
  }
  
  .extra-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .quick-actions-container {
    padding: 0 1rem;
    gap: 0.75rem;
  }
  
  .quick-action-btn {
    flex: 1;
    min-width: 140px;
    justify-content: center;
    padding: 0.875rem 1.25rem;
    font-size: 0.95rem;
  }
  
  .quick-icon {
    font-size: 1.25rem;
  }
  
  .landing-hero {
    padding: 3rem 1rem;
  }
  
  .features-section,
  .extra-section {
    padding: 3rem 1rem;
  }
  
  .landing-actions {
    flex-direction: column;
  }
  
  .landing-actions .btn {
    width: 100%;
  }
  
  .extra-grid {
    grid-template-columns: 1fr;
  }
  
  .feature-card-image {
    height: 200px;
  }
}

/* Old About Page Styles - Keep for backward compatibility */
.about-feature-section,
.about-extra-features,
.about-developer-section {
  display: none;
}

/* Footer - unified */
.site-footer {
  border-top: 1px solid var(--color-gray-200);
  padding: 1rem 1rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--color-gray-400);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0;
}
.footer-copy {
  color: var(--color-gray-400);
}
.site-footer a {
  color: var(--color-gray-500);
  text-decoration: none;
  transition: color 0.2s;
}
.site-footer a:hover { color: var(--color-primary); }
.site-footer .footer-sep { margin: 0 0.4rem; opacity: 0.4; }

/* Home Footer - see Skeleton/Footer section above */
.home-footer {
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 3rem;
  border-top: 1px solid var(--color-gray-200);
}

.footer-content {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-social {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  transition: all var(--transition);
  text-decoration: none;
}

.social-link:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.social-link svg {
  width: 20px;
  height: 20px;
}

.home-footer p {
  margin: 0;
  color: var(--color-gray-600);
  font-size: 0.9rem;
}

.footer-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
  font-size: 0.9rem;
}

.footer-link:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* Guest Gate - practice limit */
.guest-gate {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2.5rem 1.5rem;
  text-align: center;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
  margin: 1rem auto;
  max-width: 400px;
}
.guest-gate.hidden { display: none; }
.guest-gate-icon { font-size: 3rem; }
.guest-gate h3 { font-size: 1.2rem; color: var(--color-text); margin: 0; }
.guest-gate p { color: var(--color-text-secondary); font-size: 0.95rem; margin: 0; }

/* Share site button */
.btn-share-site {
  margin-top: 1.2rem;
  padding: 0.7rem 1.8rem;
  background: linear-gradient(135deg, var(--color-primary), #7c3aed);
  color: #fff;
  border: none;
  border-radius: 2rem;
  font-size: 1rem;
  font-family: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: 0 4px 15px rgba(99,102,241,0.4);
}
.btn-share-site:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99,102,241,0.5);
}

/* Hamburger & Mobile Menu */
.hamburger-btn { display: none; }
.desktop-only { display: inline-flex; }

.mobile-menu {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  padding: 0.5rem 0;
  position: relative;
  z-index: 99;
}
.mobile-menu.hidden { display: none; }
.mobile-menu-link {
  padding: 0.85rem 1.5rem;
  color: var(--color-gray-700);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 1px solid var(--color-gray-100);
  transition: background 0.15s, color 0.15s;
}
.mobile-menu-link:last-child { border-bottom: none; }
.mobile-menu-link:hover { background: var(--color-gray-100); color: var(--color-primary); }

@media (max-width: 640px) {
  .hamburger-btn { display: inline-flex; }
  .desktop-only { display: none !important; }
}


/* ═══════════════════════════════════════════════
   Unified Header v2 — matches index.html style
   ═══════════════════════════════════════════════ */

/* Override existing .header padding/shadow to match index style */
.header-v2 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 2rem;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: none;
}

.header-v2 .logo-img { height: 38px; }

/* Nav links */
.header-v2 .nav {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.header-v2 .nav-link {
  color: var(--color-gray-600);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: 0.5rem;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}

.header-v2 .nav-link:hover {
  color: var(--color-primary);
  background: var(--color-gray-100);
}

/* Ghost icon buttons (bell, user) */
.header-v2 .btn-ghost {
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-gray-600);
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.header-v2 .btn-ghost:hover {
  background: var(--color-gray-100);
  color: var(--color-primary);
}

/* Primary login button */
.header-v2 .btn-primary {
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.45rem 1.2rem;
  border-radius: 0.6rem;
  border: none;
  cursor: pointer;
  background: var(--color-primary);
  color: #fff;
  transition: background 0.2s, transform 0.1s;
  white-space: nowrap;
}

.header-v2 .btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

/* Hamburger */
.header-v2 .hamburger-btn {
  display: none;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 50%;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-gray-600);
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.header-v2 .hamburger-btn:hover { background: var(--color-gray-100); }

/* Mobile menu v2 */
.mobile-menu-v2 {
  display: none;
  flex-direction: column;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  padding: 0.5rem 1rem;
}

.mobile-menu-v2.open { display: flex; }

.mobile-menu-v2 .mobile-menu-link {
  color: var(--color-gray-600);
  text-decoration: none;
  padding: 0.7rem 0.5rem;
  border-bottom: 1px solid var(--color-gray-100);
  font-size: 0.95rem;
  transition: color 0.2s;
}

.mobile-menu-v2 .mobile-menu-link:last-child { border-bottom: none; }
.mobile-menu-v2 .mobile-menu-link:hover { color: var(--color-primary); }

/* Responsive */
@media (max-width: 640px) {
  .header-v2 { padding: 0.9rem 1rem; }
  .header-v2 .desktop-only { display: none !important; }
  .header-v2 .hamburger-btn { display: flex; }
}

/* Modern Compact Footer */
.site-footer {
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-gray-200);
  padding: 1.25rem 1rem 0.75rem;
  margin-top: auto;
}

[data-theme="dark"] .site-footer {
  border-top-color: rgba(255, 255, 255, 0.1);
}

.footer-container {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-gray-200);
}

[data-theme="dark"] .footer-container {
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.footer-section h4 {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.8;
}

.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-section li {
  margin-bottom: 0.2rem;
}

.footer-section a {
  color: var(--color-gray-600);
  text-decoration: none;
  font-size: 0.8rem;
  transition: color 0.2s;
  display: block;
  padding: 0.15rem 0;
}

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

.footer-bottom {
  max-width: 1000px;
  margin: 0 auto;
  padding-top: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-gray-900);
}

.footer-copyright {
  font-size: 0.75rem;
  color: var(--color-gray-500);
}

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

.footer-legal a {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-legal-full {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.footer-disclaimer {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  text-align: center;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  max-width: 700px;
}

[data-theme="dark"] .footer-disclaimer {
  color: var(--color-gray-400);
}

@media (max-width: 768px) {
  .footer-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
}

@media (max-width: 480px) {
  .footer-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 0.3rem;
  }
  .footer-legal {
    gap: 0.75rem;
  }
}

/* Floating Action Button (FAB) for Share */
.fab-share {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  border: none;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  z-index: 999;
  transition: all 0.3s ease;
}

.fab-share:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.fab-share:active {
  transform: scale(0.95);
}

[data-theme="dark"] .fab-share {
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

@media (max-width: 480px) {
  .fab-share {
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
    bottom: 1rem;
    left: 1rem;
  }
}