/**
 * Main Stylesheet - MyInteractiveBook Platform
 * AI-inspired design with responsive breakpoints
 * Requirements: 1.2, 1.4, 1.5, 8.1, 8.2, 8.3, 8.4, 8.5
 */

/* ============================================
   SELF-HOSTED ARABIC FONTS
   ============================================ */

@font-face {
  font-family: 'Cairo';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/Cairo-400.ttf') format('truetype');
}

@font-face {
  font-family: 'Cairo';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/Cairo-500.ttf') format('truetype');
}

@font-face {
  font-family: 'Cairo';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/Cairo-600.ttf') format('truetype');
}

@font-face {
  font-family: 'Cairo';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/Cairo-700.ttf') format('truetype');
}

@font-face {
  font-family: 'Noto Kufi Arabic';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/NotoKufiArabic-400.ttf') format('truetype');
}

@font-face {
  font-family: 'Noto Kufi Arabic';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/NotoKufiArabic-500.ttf') format('truetype');
}

@font-face {
  font-family: 'Noto Kufi Arabic';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/NotoKufiArabic-600.ttf') format('truetype');
}

@font-face {
  font-family: 'Noto Kufi Arabic';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/NotoKufiArabic-700.ttf') format('truetype');
}

@font-face {
  font-family: 'Tajawal';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/Tajawal-400.ttf') format('truetype');
}

@font-face {
  font-family: 'Tajawal';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/Tajawal-500.ttf') format('truetype');
}

@font-face {
  font-family: 'Tajawal';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/Tajawal-700.ttf') format('truetype');
}

/* ============================================
   CSS CUSTOM PROPERTIES (Variables)
   AI-inspired color palette derived from logo
   ============================================ */

:root {
  /* Primary Colors - AI-inspired blues and cyans */
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1d4ed8;
  --color-primary-rgb: 37, 99, 235;

  /* Secondary Colors - Purple accents */
  --color-secondary: #7c3aed;
  --color-secondary-light: #8b5cf6;
  --color-secondary-dark: #6d28d9;

  /* Accent Colors - Cyan highlights */
  --color-accent: #06b6d4;
  --color-accent-light: #22d3ee;
  --color-accent-dark: #0891b2;

  /* Neutral Colors */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Light Theme (Default) */
  --bg-primary: #ffffff;
  --bg-secondary: var(--color-gray-50);
  --bg-tertiary: var(--color-gray-100);
  --text-primary: var(--color-gray-900);
  --text-secondary: var(--color-gray-600);
  --text-muted: var(--color-gray-400);
  --border-color: var(--color-gray-200);
  --shadow-color: rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-arabic: 'Cairo', 'Noto Kufi Arabic', 'Tajawal', 'Traditional Arabic', serif;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 var(--shadow-color);
  --shadow-md: 0 4px 6px -1px var(--shadow-color), 0 2px 4px -2px var(--shadow-color);
  --shadow-lg: 0 10px 15px -3px var(--shadow-color), 0 4px 6px -4px var(--shadow-color);
  --shadow-xl: 0 20px 25px -5px var(--shadow-color), 0 8px 10px -6px var(--shadow-color);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-tooltip: 600;
}

/* ============================================
   DARK THEME
   ============================================ */

[data-theme="dark"] {
  /* Colors injected by reader.php from database - DO NOT hardcode here */
  --shadow-color: rgba(0, 0, 0, 0.3);
}

/* Dark mode orb enhancements - more vibrant glow */
[data-theme="dark"] .hero-orb-1 {
  opacity: 0.8;
  box-shadow: 0 0 140px 70px rgba(167, 139, 250, 0.5);
}

[data-theme="dark"] .hero-orb-2 {
  opacity: 0.8;
  box-shadow: 0 0 120px 60px rgba(232, 121, 249, 0.45);
}

[data-theme="dark"] .hero-orb-3 {
  opacity: 0.75;
  box-shadow: 0 0 100px 50px rgba(147, 197, 253, 0.4);
}

/* ============================================
   SEPIA / READING MODE THEME
   Warm sepia tones for extended reading
   ============================================ */

[data-theme="sepia"] {
  /* Colors injected by reader.php from database - DO NOT hardcode here */
  --shadow-color: rgba(92, 75, 55, 0.15);
}

/* ============================================
   HIGH CONTRAST THEME
   Maximum contrast for accessibility
   ============================================ */

[data-theme="high-contrast"] {
  /* Colors injected by reader.php from database - DO NOT hardcode here */
  --shadow-color: rgba(255, 255, 255, 0.2);
}


/* ============================================
   CSS RESET & BASE STYLES
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Prevent FOUC (Flash of Unstyled Content) for theme */
html:not([data-theme]) {
  visibility: visible;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

a:hover:not(.btn) {
  color: var(--color-primary-dark);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--spacing-md);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

/* Grid Utilities */
.grid {
  display: grid;
}

.grid-cols-1 {
  grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Text Utilities */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

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

.text-primary {
  color: var(--text-primary);
}

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

.text-muted {
  color: var(--text-muted);
}

.text-accent {
  color: var(--color-primary);
}

/* Spacing Utilities */
.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mt-2xl {
  margin-top: var(--spacing-2xl);
}

.mt-3xl {
  margin-top: var(--spacing-3xl);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.py-sm {
  padding-top: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
}

.py-md {
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-md);
}

.py-lg {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

.px-sm {
  padding-left: var(--spacing-sm);
  padding-right: var(--spacing-sm);
}

.px-md {
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

.px-lg {
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}


/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white !important;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled),
a.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, #26477e, #1a3a6e) !important;
  color: white !important;
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-tertiary);
  border-color: var(--color-primary);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: white;
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-icon {
  padding: var(--spacing-sm);
  border-radius: var(--radius-full);
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-input.error,
.form-textarea.error {
  border-color: var(--color-error);
}

.form-error {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

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

/* ============================================
   CARDS
   ============================================ */

.card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
}

.card-body {
  padding: var(--spacing-lg);
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.card-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}


/* ============================================
   BOOK CARDS (Featured Books & Library)
   ============================================ */

.book-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.book-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

.book-card-cover {
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
}

.book-card-body {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.book-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.book-card-author {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.book-card-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================
   NAVIGATION
   ============================================ */

.main-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background-color var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.nav-logo img {
  height: 80px;
  width: auto;
}

.nav-logo-text {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  direction: ltr;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-link {
  font-size: 16px;
  font-weight: var(--font-weight-bold);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  direction: ltr;
  flex-shrink: 0;
  margin-left: auto;
}

/* Nav Icon Button (Home, etc.) */
.nav-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.nav-icon-btn:hover {
  color: var(--color-primary);
  background-color: rgba(var(--color-primary-rgb), 0.1);
}

/* Mobile Navigation */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  z-index: var(--z-modal);
  padding: var(--spacing-xl);
  flex-direction: column;
  gap: var(--spacing-lg);
}

.nav-mobile.active {
  display: flex;
}

.nav-mobile-close {
  align-self: flex-end;
  font-size: var(--font-size-2xl);
}

.nav-mobile-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.nav-mobile-link {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-md);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 50%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(var(--color-primary-rgb), 0.05) 0%, transparent 50%);
  animation: pulse-bg 15s ease-in-out infinite;
}

.hero-logo {
  width: 150px;
  height: auto;
  margin-bottom: var(--spacing-xl);
  animation: float 6s ease-in-out infinite;
  position: relative;
  z-index: 1;
}

/* Bouncing book animation for hero */
.hero-book-bounce {
  animation: book-bounce 2s ease-in-out infinite;
}

@keyframes book-bounce {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-20px);
  }
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  font-family: 'Georgia', serif;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  z-index: 1;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: var(--spacing-xl);
  position: relative;
  z-index: 1;
}

.hero-cta {
  position: relative;
  z-index: 1;
}


/* ============================================
   FEATURED BOOKS SECTION
   ============================================ */

.featured-books {
  padding: var(--spacing-3xl) var(--spacing-md);
  background-color: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-3xl) var(--spacing-md);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
}

/* RTL footer - text alignment */
[dir="rtl"].footer .footer-brand,
[dir="rtl"].footer .footer-links,
[dir="rtl"].footer .footer-contact {
  text-align: right;
}

[dir="rtl"].footer .footer-logo {
  justify-content: flex-start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-logo img {
  height: 32px;
}

.footer-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  max-width: 300px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

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

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

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-bottom {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-copyright {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ============================================
   DASHBOARD
   ============================================ */

.dashboard {
  background-color: var(--bg-secondary);
}

.dashboard-header {
  background-color: var(--bg-primary);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border-color);
}

.dashboard-header .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 calc(var(--spacing-md) + 15px);
}

.dashboard-greeting {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin: 0;
}

.dashboard-greeting-name {
  color: var(--color-primary);
}

.dashboard-content {
  padding: var(--spacing-lg) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.library-empty {
  text-align: center;
  padding: var(--spacing-3xl);
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--border-color);
}

.library-empty-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.5;
}

.library-empty-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.library-empty-text {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   AUTH PAGES (Login, Register, etc.)
   ============================================ */

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.auth-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background-color: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-2xl);
}

.auth-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.auth-logo {
  width: 80px;
  height: auto;
  margin: 0 auto var(--spacing-lg);
}

.auth-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-sm);
}

.auth-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.auth-footer {
  margin-top: var(--spacing-xl);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

/* Back to Home Link */
.back-to-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.back-to-home:hover {
  color: var(--color-primary);
  transform: translateX(-4px);
}

.back-to-home svg {
  transition: transform var(--transition-fast);
}

.back-to-home:hover svg {
  transform: translateX(-4px);
}

/* Alert Messages */
.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
}

.alert-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-info {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--color-info);
  border: 1px solid rgba(59, 130, 246, 0.2);
}


/* ============================================
   ADMIN INTERFACE
   ============================================ */

.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 250px;
  background-color: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-lg);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  overflow-y: auto;
}

.admin-sidebar-header {
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--spacing-lg);
}

.admin-nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.admin-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.admin-nav-link:hover,
.admin-nav-link.active {
  background-color: var(--bg-tertiary);
  color: var(--color-primary);
}

/* Navigation Badge */
.nav-badge {
  margin-left: auto;
  background-color: #ef4444;
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

.admin-nav-link.active .nav-badge {
  background-color: rgba(37, 99, 235, 0.2);
  color: var(--color-primary);
}

/* Admin Submenu Styles */
.admin-nav-group {
  position: relative;
}

.admin-nav-group > .admin-nav-link {
  position: relative;
}

.admin-nav-group > .admin-nav-link .submenu-arrow {
  margin-left: auto;
  transition: transform 0.2s ease;
}

.admin-nav-group.expanded > .admin-nav-link .submenu-arrow {
  transform: rotate(180deg);
}

.admin-submenu {
  display: none;
  flex-direction: column;
  gap: 2px;
  margin-top: 4px;
  margin-left: var(--spacing-lg);
  padding-left: var(--spacing-sm);
  border-left: 2px solid var(--border-color);
}

.admin-nav-group.expanded .admin-submenu {
  display: flex;
}

.admin-submenu-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.8rem;
  transition: all var(--transition-fast);
}

.admin-submenu-link:hover {
  background-color: var(--bg-tertiary);
  color: var(--color-primary);
}

.admin-submenu-link.active {
  background-color: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  font-weight: 600;
  border-left: 2px solid var(--color-primary);
  margin-left: -2px;
  padding-left: 10px;
}

.admin-main {
  flex: 1;
  margin-left: 250px;
  padding: var(--spacing-xl);
  background-color: var(--bg-secondary);
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-xl);
}

.admin-title {
  font-size: var(--font-size-2xl);
}

/* Admin Tables */
.admin-table {
  width: 100%;
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.admin-table th,
.admin-table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.admin-table th {
  background-color: var(--bg-tertiary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover td {
  background-color: var(--bg-secondary);
}

/* Search Box */
.search-box {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  max-width: 300px;
}

.search-box input {
  flex: 1;
  border: none;
  background: none;
  outline: none;
  font-size: var(--font-size-sm);
}

.search-box:focus-within {
  border-color: var(--color-primary);
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
}

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

.badge-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

.badge-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

.badge-info {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--color-info);
}

/* ============================================
   THEME TOGGLE BUTTON
   ============================================ */

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
  border-color: var(--color-primary);
}

.theme-toggle-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-normal);
}

.theme-toggle:hover .theme-toggle-icon {
  transform: rotate(15deg);
}

/* Sun icon (shown in dark mode) */
.theme-icon-sun {
  display: none;
}

/* Moon icon (shown in light mode) */
.theme-icon-moon {
  display: block;
}

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

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


/* ============================================
   ANIMATIONS
   Requirements: 1.4 - Smooth animations and visual transitions
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

/* Hero Orb Animations - Dramatic Circular Orbit with Glow Pulsing */
@keyframes orbitOrb1 {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 0.7;
    filter: blur(80px);
  }
  12.5% {
    transform: translate(-150px, 80px) scale(1.15);
    opacity: 0.8;
  }
  25% {
    transform: translate(-280px, 180px) scale(1.35);
    opacity: 0.9;
    filter: blur(70px);
  }
  37.5% {
    transform: translate(-200px, 320px) scale(1.2);
    opacity: 0.75;
  }
  50% {
    transform: translate(-50px, 380px) scale(0.9);
    opacity: 0.6;
    filter: blur(90px);
  }
  62.5% {
    transform: translate(120px, 280px) scale(0.75);
    opacity: 0.65;
  }
  75% {
    transform: translate(180px, 140px) scale(0.85);
    opacity: 0.7;
    filter: blur(85px);
  }
  87.5% {
    transform: translate(100px, 50px) scale(0.95);
    opacity: 0.75;
  }
  100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.7;
    filter: blur(80px);
  }
}

@keyframes orbitOrb2 {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 0.7;
    filter: blur(80px);
  }
  12.5% {
    transform: translate(180px, -60px) scale(0.85);
    opacity: 0.6;
  }
  25% {
    transform: translate(350px, -150px) scale(0.7);
    opacity: 0.55;
    filter: blur(90px);
  }
  37.5% {
    transform: translate(450px, -80px) scale(0.9);
    opacity: 0.7;
  }
  50% {
    transform: translate(400px, 50px) scale(1.2);
    opacity: 0.85;
    filter: blur(70px);
  }
  62.5% {
    transform: translate(280px, 120px) scale(1.35);
    opacity: 0.9;
  }
  75% {
    transform: translate(140px, 80px) scale(1.15);
    opacity: 0.8;
    filter: blur(75px);
  }
  87.5% {
    transform: translate(50px, 30px) scale(1.05);
    opacity: 0.75;
  }
  100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.7;
    filter: blur(80px);
  }
}

@keyframes orbitOrb3 {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.65;
    filter: blur(80px);
  }
  12.5% {
    transform: translate(-120px, -180px) scale(1.2);
    opacity: 0.8;
  }
  25% {
    transform: translate(50px, -250px) scale(1.45);
    opacity: 0.9;
    filter: blur(65px);
  }
  37.5% {
    transform: translate(180px, -150px) scale(1.25);
    opacity: 0.75;
  }
  50% {
    transform: translate(200px, 30px) scale(0.85);
    opacity: 0.55;
    filter: blur(95px);
  }
  62.5% {
    transform: translate(100px, 150px) scale(0.65);
    opacity: 0.5;
  }
  75% {
    transform: translate(-50px, 180px) scale(0.75);
    opacity: 0.6;
    filter: blur(85px);
  }
  87.5% {
    transform: translate(-100px, 50px) scale(0.9);
    opacity: 0.65;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.65;
    filter: blur(80px);
  }
}

@keyframes pulse-bg {

  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.5;
  }

  50% {
    transform: translate(-50%, -50%) scale(1.1);
    opacity: 0.3;
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }

  100% {
    background-position: 200% 0;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/* Animation Utility Classes */
.animate-fade-in {
  animation: fadeIn var(--transition-normal) ease-out forwards;
}

.animate-fade-in-up {
  animation: fadeInUp var(--transition-slow) ease-out forwards;
}

.animate-fade-in-down {
  animation: fadeInDown var(--transition-slow) ease-out forwards;
}

.animate-slide-in-left {
  animation: slideInLeft var(--transition-slow) ease-out forwards;
}

.animate-slide-in-right {
  animation: slideInRight var(--transition-slow) ease-out forwards;
}

.animate-scale-in {
  animation: scaleIn var(--transition-slow) ease-out forwards;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* Staggered Animation Delays */
.animate-delay-100 {
  animation-delay: 100ms;
}

.animate-delay-200 {
  animation-delay: 200ms;
}

.animate-delay-300 {
  animation-delay: 300ms;
}

.animate-delay-400 {
  animation-delay: 400ms;
}

.animate-delay-500 {
  animation-delay: 500ms;
}

/* Scroll Animation (triggered by JS) */
.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Loading Skeleton */
.skeleton {
  background: linear-gradient(90deg,
      var(--bg-tertiary) 25%,
      var(--bg-secondary) 50%,
      var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* Loading Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-color);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}


/* ============================================
   RESPONSIVE BREAKPOINTS
   Mobile-first approach
   Requirements: 1.5, 8.1, 8.2, 8.3
   
   Breakpoints:
   - Mobile: < 768px (default styles)
   - Tablet: 768px - 1023px
   - Desktop: >= 1024px
   ============================================ */

/* Mobile Navigation (default - shown on mobile) */
@media (max-width: 767px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  .hero-logo {
    width: 80px;
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .books-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-brand {
    align-items: center;
  }

  .footer-description {
    max-width: 100%;
  }

  /* Admin Mobile */
  .admin-sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: var(--z-modal);
  }

  .admin-sidebar.open {
    transform: translateX(0);
  }

  .admin-main {
    margin-left: 0;
  }

  .admin-table {
    display: block;
    overflow-x: auto;
  }

  /* Auth Card Mobile */
  .auth-card {
    padding: var(--spacing-lg);
  }
}

/* ============================================
   TABLET BREAKPOINT (768px - 1023px)
   ============================================ */

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }

  .nav-toggle {
    display: none;
  }

  .nav-links {
    display: flex;
  }

  .hero {
    min-height: 85vh;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-logo {
    width: 100px;
  }

  .books-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .dashboard-content {
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  /* Grid utilities for tablet */
  .tablet\:grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .tablet\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================
   DESKTOP BREAKPOINT (>= 1024px)
   ============================================ */

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--spacing-xl);
  }

  .hero {
    min-height: 90vh;
  }

  .hero-title {
    font-size: var(--font-size-5xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-xl);
  }

  .hero-logo {
    width: 120px;
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }

  .books-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-container {
    grid-template-columns: 2fr 1fr 1fr 2fr;
  }

  /* Grid utilities for desktop */
  .desktop\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .desktop\:grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   LARGE DESKTOP (>= 1280px)
   ============================================ */

@media (min-width: 1280px) {
  .container {
    max-width: 1280px;
  }

  .books-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {

  .main-nav,
  .footer,
  .theme-toggle,
  .btn {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .card,
  .book-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* ============================================
   REDUCED MOTION
   Accessibility: Respect user preferences
   ============================================ */

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ============================================
   HIGH CONTRAST MODE
   ============================================ */

@media (prefers-contrast: high) {
  :root {
    --border-color: var(--text-primary);
  }

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

  .card,
  .book-card {
    border-width: 2px;
  }
}


/* ============================================
   LANDING PAGE ENHANCEMENTS
   Requirements: 1.1, 1.3, 1.4, 1.6
   ============================================ */

/* Hero Section Enhancements */
.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: 0;
}

.hero-gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.7;
  mix-blend-mode: screen;
  will-change: transform, opacity;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle at 30% 30%, #c084fc 0%, #a78bfa 50%, #8b5cf6 100%);
  top: -100px;
  right: -100px;
  box-shadow: 0 0 120px 60px rgba(167, 139, 250, 0.4);
  animation: orbitOrb1 14s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.hero-orb-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle at 70% 30%, #f0abfc 0%, #e879f9 50%, #d946ef 100%);
  bottom: -50px;
  left: -50px;
  box-shadow: 0 0 100px 50px rgba(232, 121, 249, 0.35);
  animation: orbitOrb2 18s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.hero-orb-3 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle at 50% 50%, #a5b4fc 0%, #93c5fd 50%, #60a5fa 100%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 80px 40px rgba(147, 197, 253, 0.3);
  animation: orbitOrb3 11s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 800px;
  padding: 0 var(--spacing-md);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 0;
  right: 0;
  margin: 0 auto;
  width: fit-content;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  animation: float 3s ease-in-out infinite;
}

.hero-scroll-indicator svg {
  opacity: 0.6;
}

/* Features Section */
.features-section {
  padding: var(--spacing-3xl) var(--spacing-md);
  background-color: var(--bg-primary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

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

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  color: white;
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.feature-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

/* ============================================
   AI TOOLS SECTION
   ============================================ */

.ai-tools-section {
  padding: var(--spacing-3xl) var(--spacing-md);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 50%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.ai-tools-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(124, 58, 237, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.ai-tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

@media (min-width: 1024px) {
  .ai-tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.ai-tool-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.ai-tool-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.ai-tool-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ai-tool-icon-chat {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
}

.ai-tool-icon-clarify {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
  color: white;
}

.ai-tool-icon-translate {
  background: linear-gradient(135deg, #7c3aed, #14b8a6);
  color: white;
}

.ai-tool-content {
  flex: 1;
}

.ai-tool-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.ai-tool-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ai-tool-description {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
}

.ai-tool-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.ai-tool-features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.ai-tool-features li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: var(--font-weight-bold);
}

/* AI Tool Demo Boxes */
.ai-tool-demo {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
}

/* Chat Demo */
.chat-demo {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.chat-demo-message {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  max-width: 85%;
}

.chat-demo-user {
  background: var(--color-primary);
  color: white;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.chat-demo-ai {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

/* Clarify Demo */
.clarify-demo {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.clarify-demo-text {
  font-size: var(--font-size-base);
  color: var(--text-primary);
  line-height: 1.6;
}

.clarify-demo-highlight {
  background: linear-gradient(120deg, rgba(124, 58, 237, 0.3) 0%, rgba(124, 58, 237, 0.3) 100%);
  padding: 2px 4px;
  border-radius: 4px;
  cursor: pointer;
}

.clarify-demo-popup {
  background: var(--bg-primary);
  border: 1px solid var(--color-secondary);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
}

.clarify-demo-popup strong {
  color: var(--color-secondary);
}

/* AI Tools CTA */
.ai-tools-cta {
  text-align: center;
  margin-top: var(--spacing-2xl);
  position: relative;
  z-index: 1;
}

.ai-tools-cta p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

/* Enhanced Book Cards */
.book-card-cover-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.book-card-cover-img {
  width: 100%;
  height: auto;
  aspect-ratio: 2/3;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-normal);
}

.book-card:hover .book-card-cover-img {
  transform: scale(1.05);
}

.book-card-cover {
  width: 100%;
  aspect-ratio: 2/3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.book-card-cover-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-lg);
  color: white;
}

.book-card-cover-title {
  font-family: var(--font-family-arabic);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.book-card-cover-subtitle {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.book-card-cover-placeholder {
  background: linear-gradient(135deg, var(--color-gray-400), var(--color-gray-500));
}

.book-card-cover-placeholder svg {
  opacity: 0.5;
  margin-bottom: var(--spacing-sm);
}

.book-card-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Public Badge - Top Corner Ribbon */
.book-badge-public {
  position: absolute;
  top: 0;
  right: 0;
  background: linear-gradient(135deg, #27ae60, #229954);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 6px 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(39, 174, 96, 0.4);
  display: flex;
  align-items: center;
  gap: 4px;
  z-index: 10;
  border-radius: 0 var(--radius-lg) 0 8px;
}

.book-badge-public svg {
  flex-shrink: 0;
}

[data-theme="dark"] .book-badge-public {
  background: linear-gradient(135deg, #2ecc71, #27ae60);
  box-shadow: 0 2px 8px rgba(46, 204, 113, 0.5);
}

.book-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.book-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  margin-top: auto;
  padding-top: var(--spacing-md);
}

.book-card-tag {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  background-color: rgba(var(--color-primary-rgb), 0.1);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
}

.book-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  padding: 8px 16px;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.book-card-cta:hover {
  transform: translateY(-2px) scale(1.02);
}

.book-card-coming-soon {
  opacity: 0.7;
  cursor: default;
}

.book-card-coming-soon:hover {
  transform: none;
  box-shadow: var(--shadow-md);
}

/* About Section */
.about-section {
  padding: var(--spacing-3xl) var(--spacing-md);
  background-color: var(--bg-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  max-width: 1200px;
  margin: 0 auto;
  align-items: center;
}

.about-text {
  order: 2;
}

.about-text p {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
}

.about-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

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

.stat-number {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.about-image {
  order: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Logo Flares Container */
.logo-flares-container {
  position: relative;
  display: inline-block;
}

.about-logo {
  max-width: 300px;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 10px 30px rgba(var(--color-primary-rgb), 0.2));
  animation: logoPulse 4s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  will-change: transform, filter;
  position: relative;
  z-index: 1;
}

/* Professional Logo Pulse Animation - Subtle breathing effect */
@keyframes logoPulse {
  0%, 100% {
    transform: scale(1);
    filter: drop-shadow(0 10px 30px rgba(var(--color-primary-rgb), 0.2));
  }
  50% {
    transform: scale(1.05);
    filter: drop-shadow(0 15px 40px rgba(var(--color-primary-rgb), 0.35));
  }
}

/* Pause animation on hover for interactivity */
.logo-flares-container:hover .about-logo {
  animation-play-state: paused;
  transform: scale(1.08);
  filter: drop-shadow(0 20px 50px rgba(var(--color-primary-rgb), 0.4));
  transition: transform 0.3s ease, filter 0.3s ease;
}

/* Sparkle Flares */
.flare {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: radial-gradient(circle, #fff 0%, rgba(167, 139, 250, 0.8) 40%, transparent 70%);
  box-shadow: 0 0 10px 3px rgba(167, 139, 250, 0.6),
              0 0 20px 6px rgba(124, 58, 237, 0.3);
  opacity: 0;
  z-index: 2;
  pointer-events: none;
}

/* Star-burst shape using pseudo-elements */
.flare::before,
.flare::after {
  content: '';
  position: absolute;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.9), transparent);
}

.flare::before {
  width: 20px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.flare::after {
  width: 2px;
  height: 20px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Position each flare around the logo */
.flare-1 {
  top: 5%;
  right: 15%;
  animation: sparkle 3s ease-in-out infinite;
  animation-delay: 0s;
}

.flare-2 {
  top: 20%;
  left: 5%;
  animation: sparkle 3.5s ease-in-out infinite;
  animation-delay: 0.7s;
}

.flare-3 {
  bottom: 25%;
  right: 5%;
  animation: sparkle 2.8s ease-in-out infinite;
  animation-delay: 1.4s;
}

.flare-4 {
  top: 45%;
  right: 0%;
  animation: sparkle 3.2s ease-in-out infinite;
  animation-delay: 2.1s;
}

.flare-5 {
  bottom: 10%;
  left: 20%;
  animation: sparkle 3s ease-in-out infinite;
  animation-delay: 0.5s;
}

/* Sparkle Animation */
@keyframes sparkle {
  0%, 100% {
    opacity: 0;
    transform: scale(0.3) rotate(0deg);
  }
  20% {
    opacity: 1;
    transform: scale(1) rotate(45deg);
  }
  40% {
    opacity: 0.8;
    transform: scale(1.2) rotate(90deg);
  }
  60% {
    opacity: 1;
    transform: scale(0.9) rotate(135deg);
  }
  80% {
    opacity: 0.6;
    transform: scale(0.6) rotate(180deg);
  }
}

/* Pause flares on hover */
.logo-flares-container:hover .flare {
  animation-play-state: paused;
  opacity: 1;
  transform: scale(1.3);
}

/* CTA Section */
.cta-section {
  padding: var(--spacing-3xl) var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  text-align: center;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: var(--font-size-3xl);
  color: white;
  margin-bottom: var(--spacing-md);
}

.cta-subtitle {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.cta-section .btn-primary {
  background: white;
  color: var(--color-primary) !important;
}

.cta-section .btn-primary:hover {
  background: linear-gradient(135deg, #26477e, #1a3a6e) !important;
  color: white !important;
  transform: translateY(-2px);
}

.cta-section .btn-outline {
  border-color: white;
  color: white;
}

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

/* Nav Logo Image - Theme-based switching */
.nav-logo-img {
  height: 80px;
  width: auto;
}

/* Show dark bg logo in dark mode, light bg logo in light mode */
.nav-logo-dark {
  display: block;
}

.nav-logo-light {
  display: none;
}

[data-theme="light"] .nav-logo-dark {
  display: none;
}

[data-theme="light"] .nav-logo-light {
  display: block;
}

/* Footer logo theme switching */
.footer-logo img {
  height: 80px;
  width: auto;
}

.footer-logo .nav-logo-dark,
.footer-logo-dark {
  display: block;
}

.footer-logo .nav-logo-light,
.footer-logo-light {
  display: none;
}

[data-theme="light"] .footer-logo .nav-logo-dark,
[data-theme="light"] .footer-logo-dark {
  display: none;
}

[data-theme="light"] .footer-logo .nav-logo-light,
[data-theme="light"] .footer-logo-light {
  display: block;
}

/* ============================================
   LANDING PAGE RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-content {
    grid-template-columns: 1fr 1fr;
  }

  .about-text {
    order: 1;
  }

  .about-image {
    order: 2;
  }

  .hero-orb-1 {
    width: 500px;
    height: 500px;
    box-shadow: 0 0 150px 75px rgba(167, 139, 250, 0.45);
  }

  .hero-orb-2 {
    width: 400px;
    height: 400px;
    box-shadow: 0 0 120px 60px rgba(232, 121, 249, 0.4);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-orb-1 {
    width: 600px;
    height: 600px;
    box-shadow: 0 0 180px 90px rgba(167, 139, 250, 0.5);
  }

  .hero-orb-2 {
    width: 500px;
    height: 500px;
    box-shadow: 0 0 150px 75px rgba(232, 121, 249, 0.45);
  }

  .hero-orb-3 {
    width: 300px;
    height: 300px;
    box-shadow: 0 0 100px 50px rgba(147, 197, 253, 0.35);
  }
}


/* ============================================
   NAVBAR SCROLL STATE
   ============================================ */

.main-nav.scrolled {
  background-color: var(--bg-primary);
  box-shadow: var(--shadow-md);
}

.main-nav.hidden {
  transform: translateY(-100%);
}

/* Feature icon transition */
.feature-icon {
  transition: transform var(--transition-normal);
}


/* ============================================
   CONTACT FORM IN FOOTER
   Requirements: 5.2, 5.4
   ============================================ */

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.contact-form-group {
  display: flex;
  flex-direction: column;
}

.contact-form-input,
.contact-form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  color: var(--text-primary);
}

.contact-form-input:focus,
.contact-form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(var(--color-primary-rgb), 0.1);
}

.contact-form-input::placeholder,
.contact-form-textarea::placeholder {
  color: var(--text-muted);
}

.contact-form-input.error,
.contact-form-textarea.error {
  border-color: var(--color-error);
}

.contact-form-textarea {
  min-height: 80px;
  resize: vertical;
}

.contact-form-error {
  display: none;
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: var(--spacing-xs);
}

.contact-form-submit {
  margin-top: var(--spacing-sm);
  width: 100%;
}

.contact-form-submit-loading {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.contact-form-submit-loading .spinner {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.contact-form-message {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-sm);
  text-align: center;
}

.contact-form-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.contact-form-error-msg {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Footer Contact Section Adjustments */
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-contact .footer-description {
  margin-bottom: 0;
}

/* Responsive adjustments for contact form */
@media (max-width: 767px) {
  .footer-contact {
    align-items: stretch;
    text-align: left;
  }

  .contact-form {
    width: 100%;
    max-width: 100%;
  }

  .contact-form-input,
  .contact-form-textarea {
    font-size: 16px;
    padding: 0.875rem;
  }

  .contact-form-textarea {
    min-height: 120px;
  }

  /* RTL adjustments for mobile */
  [dir="rtl"] .footer-contact {
    text-align: right;
  }
}

/* Tablet adjustments */
@media (min-width: 768px) and (max-width: 1023px) {
  .contact-form {
    max-width: 100%;
  }
}

@media (min-width: 1024px) {
  .contact-form {
    max-width: 280px;
  }
}


/* ============================================
   PRIVACY PAGE
   Requirements: 4.1, 4.2
   ============================================ */

.privacy-page {
  padding: var(--spacing-2xl) var(--spacing-md);
  background-color: var(--bg-secondary);
  min-height: calc(100vh - 200px);
}

.privacy-content {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-2xl);
}

.privacy-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.privacy-header h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.privacy-updated {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-style: italic;
}

.privacy-section {
  margin-bottom: var(--spacing-xl);
}

.privacy-section h2 {
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-primary);
}

.privacy-section h3 {
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.privacy-section p {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
}

.privacy-section ul {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.privacy-section li {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-sm);
  list-style-type: disc;
}

.privacy-section li strong {
  color: var(--text-primary);
}

.privacy-section a {
  color: var(--color-primary);
  text-decoration: underline;
}

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

.contact-info {
  background-color: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
}

.contact-info p {
  margin-bottom: var(--spacing-sm);
}

.contact-info p:last-child {
  margin-bottom: 0;
}

/* Responsive adjustments */
@media (max-width: 767px) {
  .privacy-content {
    padding: var(--spacing-lg);
  }

  .privacy-header h1 {
    font-size: var(--font-size-2xl);
  }

  .privacy-section h2 {
    font-size: var(--font-size-lg);
  }
}


/* ============================================
   OAUTH / SOCIAL LOGIN BUTTONS
   ============================================ */

.oauth-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.btn-oauth {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.btn-oauth:hover {
  background-color: var(--bg-secondary);
  border-color: var(--text-muted);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-oauth svg {
  flex-shrink: 0;
}

.btn-google:hover {
  border-color: #4285F4;
}

.btn-facebook {
  background-color: #1877F2;
  border-color: #1877F2;
  color: white;
}

.btn-facebook:hover {
  background-color: #166FE5;
  border-color: #166FE5;
  color: white;
}

.btn-facebook svg {
  fill: white;
}

.btn-microsoft:hover {
  border-color: #00A4EF;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--border-color);
}


/* ============================================
   LANGUAGE SWITCHER
   ============================================ */

/* Page-level language switcher (fixed position) */
.page-lang-switcher {
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: var(--z-fixed);
}

[dir="rtl"] .page-lang-switcher {
  right: auto;
  left: var(--spacing-md);
}

/* Mobile: Prevent overflow and adjust positioning */
@media (max-width: 768px) {
  .page-lang-switcher {
    top: var(--spacing-sm, 0.5rem);
    right: var(--spacing-sm, 0.5rem);
    max-width: calc(100vw - 1rem);
  }

  [dir="rtl"] .page-lang-switcher {
    left: var(--spacing-sm, 0.5rem);
    right: auto;
  }
}

.lang-switcher {
  position: relative;
}

.lang-switcher-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-switcher-btn:hover {
  background-color: var(--bg-secondary);
  border-color: var(--color-primary);
  color: var(--text-primary);
}

.lang-switcher-btn svg {
  width: 16px;
  height: 16px;
}

.lang-switcher-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--spacing-xs);
  min-width: 140px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

/* Mobile: Prevent dropdown overflow */
@media (max-width: 768px) {
  .lang-switcher-dropdown {
    right: 0;
    left: auto;
    min-width: 120px;
    max-width: calc(100vw - 1rem);
  }

  [dir="rtl"] .lang-switcher-dropdown {
    left: 0;
    right: auto;
  }
}

.lang-switcher:hover .lang-switcher-dropdown,
.lang-switcher:focus-within .lang-switcher-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switcher-dropdown a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.lang-switcher-dropdown a:hover {
  background-color: var(--bg-tertiary);
  color: var(--color-primary);
}

.lang-switcher-dropdown a.active {
  background-color: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

/* ============================================
   RTL (Right-to-Left) SUPPORT
   ============================================ */

[dir="rtl"] {
  direction: rtl;
  text-align: right;
}

[dir="rtl"] .form-group {
  text-align: right;
}

[dir="rtl"] .auth-footer {
  text-align: center;
}

[dir="rtl"] .back-to-home {
  flex-direction: row-reverse;
}

[dir="rtl"] .back-to-home:hover {
  transform: translateX(4px);
}

[dir="rtl"] .back-to-home:hover svg {
  transform: translateX(4px) scaleX(-1);
}

[dir="rtl"] .back-to-home svg {
  transform: scaleX(-1);
}

[dir="rtl"] .lang-switcher-dropdown {
  right: auto;
  left: 0;
}

[dir="rtl"] .hero-cta {
  flex-direction: row-reverse;
}

[dir="rtl"] .feature-card,
[dir="rtl"] .ai-tool-card {
  text-align: right;
}

[dir="rtl"] .footer-container,
.footer[dir="rtl"] .footer-container {
  text-align: right;
}

.footer[dir="rtl"] .footer-links,
.footer[dir="rtl"] .footer-brand,
.footer[dir="rtl"] .footer-contact {
  align-items: flex-start;
}

.footer[dir="rtl"] .contact-form-input,
.footer[dir="rtl"] .contact-form-textarea {
  text-align: right;
}

[dir="rtl"] .admin-sidebar {
  left: auto;
  right: 0;
  border-right: none;
  border-left: 1px solid var(--border-color);
}

[dir="rtl"] .admin-main {
  margin-left: 0;
  margin-right: 250px;
}

[dir="rtl"] .admin-nav-link {
  flex-direction: row-reverse;
}

/* Arabic font adjustments */
[lang="ar"] body,
.footer[dir="rtl"] {
  font-family: 'Noto Kufi Arabic', var(--font-family-base);
}

[lang="ar"] h1,
[lang="ar"] h2,
[lang="ar"] h3,
[lang="ar"] h4,
[lang="ar"] h5,
[lang="ar"] h6,
[lang="ar"] .hero-title,
[lang="ar"] .section-title,
[lang="ar"] .auth-title,
[lang="ar"] .cta-title,
.footer[dir="rtl"] .footer-links-title {
  font-family: 'Cairo', var(--font-family-heading);
}

[lang="ar"] .btn,
[lang="ar"] .nav-link,
[lang="ar"] .nav-mobile-link {
  font-family: 'Noto Kufi Arabic', var(--font-family-base);
}

/* Larger nav font for Arabic */
[lang="ar"] .nav-link {
  font-size: 17px;
}

[lang="ar"] .nav-mobile-link {
  font-size: var(--font-size-2xl);
}

/* Slightly larger font for Arabic readability */
[lang="ar"] .hero-subtitle,
[lang="ar"] .section-subtitle,
[lang="ar"] .feature-description {
  font-size: calc(var(--font-size-lg) * 1.1);
  line-height: 1.8;
}


/* ============================================
   SETTINGS DROPDOWN (Language + Theme)
   ============================================ */

.settings-dropdown {
  position: relative;
}

.settings-dropdown-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.settings-dropdown-btn:hover {
  background-color: var(--bg-secondary);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.settings-dropdown-btn svg {
  transition: transform var(--transition-normal);
}

.settings-dropdown:hover .settings-dropdown-btn svg {
  transform: rotate(45deg);
}

.settings-dropdown-menu {
  position: absolute;
  top: calc(100% + var(--spacing-sm));
  right: 0;
  min-width: 200px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
  overflow: hidden;
}

/* Show on hover (desktop) or when active (mobile click) */
.settings-dropdown:hover .settings-dropdown-menu,
.settings-dropdown:focus-within .settings-dropdown-menu,
.settings-dropdown.active .settings-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

[dir="rtl"] .settings-dropdown-menu {
  right: auto;
  left: 0;
}

.settings-section {
  padding: var(--spacing-md);
}

.settings-section+.settings-section {
  border-top: 1px solid var(--border-color);
}

.settings-section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.settings-section-title svg {
  opacity: 0.7;
}

/* Language Options */
.settings-lang-options {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.settings-lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.settings-lang-option:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.settings-lang-option.active {
  background-color: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.settings-lang-option svg {
  color: var(--color-primary);
}

/* Theme Toggle Switch */
.settings-theme-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-sm);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.settings-theme-toggle:hover {
  border-color: var(--color-primary);
}

.settings-theme-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
  padding: 0 var(--spacing-sm);
  transition: color var(--transition-fast);
}

.settings-theme-switch {
  width: 36px;
  height: 20px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  position: relative;
  transition: background-color var(--transition-fast);
}

.settings-theme-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background-color: white;
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* Light theme state */
.settings-theme-light {
  color: var(--color-primary);
}

/* Dark theme state */
[data-theme="dark"] .settings-theme-switch::after {
  transform: translateX(16px);
}

[data-theme="dark"] .settings-theme-light {
  color: var(--text-muted);
}

[data-theme="dark"] .settings-theme-dark {
  color: var(--color-primary);
}


/* Admin link inside settings dropdown */
.settings-admin-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.settings-admin-link:hover {
  background-color: rgba(var(--color-primary-rgb), 0.1);
}

.settings-admin-link svg {
  opacity: 0.8;
}

/* ============================================
   MOBILE RESPONSIVE - Hide Sign In on Mobile
   ============================================ */

/* Hide desktop Sign In button on mobile */
.nav-signin-desktop {
  display: none;
}

/* Mobile header layout: hamburger left, logo center, settings right */
@media (max-width: 767px) {
  .nav-container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .nav-toggle {
    display: flex;
    order: 1;
    justify-self: start;
  }

  .nav-logo {
    order: 2;
    justify-self: center;
  }

  .nav-logo img {
    height: 50px;
  }

  .nav-actions {
    order: 3;
    justify-self: end;
  }

  .nav-links {
    display: none;
  }
}

/* Show on tablet and desktop */
@media (min-width: 768px) {
  .nav-signin-desktop {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }
}


/* ============================================
   MOBILE NAV MENU STYLES
   ============================================ */

.nav-mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.nav-mobile-logo img {
  height: 50px;
  width: auto;
}

.nav-mobile-close {
  font-size: 2rem;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--spacing-sm);
  line-height: 1;
}

.nav-mobile-close:hover {
  color: var(--color-primary);
}


/* ============================================
   ADMIN MOBILE STYLES
   ============================================ */

/* Mobile Admin Header - hidden on desktop */
.admin-mobile-header {
  display: none;
}

/* Mobile sidebar close button - hidden on desktop */
.admin-sidebar-close {
  display: none;
}

/* Mobile overlay */
.admin-sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.admin-sidebar-overlay.active {
  display: block;
  opacity: 1;
}

@media (max-width: 768px) {

  /* Admin layout becomes single column */
  .admin-layout {
    display: block;
  }

  /* Show mobile header */
  .admin-mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
  }

  .admin-mobile-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 28px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
  }

  .admin-mobile-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
  }

  .admin-mobile-logo img {
    height: 40px;
    width: auto;
  }

  /* Theme toggle in mobile admin header */
  .admin-mobile-header .theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
  }

  .admin-mobile-header .theme-toggle:hover,
  .admin-mobile-header .theme-toggle:active {
    background-color: var(--bg-secondary);
    border-color: var(--color-primary);
  }

  .admin-mobile-header .theme-toggle-icon {
    width: 20px;
    height: 20px;
  }

  /* Hide desktop sidebar */
  .admin-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: 999;
    display: flex;
    flex-direction: column;
  }

  .admin-sidebar.active {
    transform: translateX(0);
  }

  /* Show close button on mobile */
  .admin-sidebar-close {
    display: block;
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
  }

  .admin-sidebar-close:hover {
    color: var(--color-primary);
  }

  /* Main content takes full width */
  .admin-main {
    margin-left: 0;
    padding: var(--spacing-md);
  }

  /* Hide desktop header actions in admin-main on mobile */
  .admin-header .nav-actions {
    display: none;
  }

  /* Hide topbar theme toggle on mobile (mobile header has its own) */
  .admin-top-bar .nav-actions {
    display: none;
  }

  /* Admin header adjustments */
  .admin-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .admin-title {
    font-size: var(--font-size-xl);
  }

  /* Remove horizontal scroll for card-based tables on mobile */
  .admin-card-body {
    overflow-x: visible;
  }

  .admin-table {
    display: block;
    min-width: 0;
    box-shadow: none;
  }

  /* Convert table to card layout on mobile */
  .admin-table thead {
    display: none;
  }

  .admin-table tbody {
    display: block;
  }

  .admin-table tr {
    display: block;
    margin-bottom: var(--spacing-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
  }

  .admin-table td {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
    text-align: right;
    min-height: 32px;
  }

  .admin-table td:last-child {
    border-bottom: none;
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-xs);
    border-top: 1px solid var(--border-color);
  }

  /* Add labels before each cell using data-label attribute */
  .admin-table td::before {
    content: attr(data-label);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
    margin-right: var(--spacing-md);
    min-width: 80px;
    text-align: left;
  }

  /* Hide label for empty data-label (Actions column) */
  .admin-table td[data-label=""]::before {
    content: "Actions";
  }

  /* User info styling in mobile cards */
  .admin-table .user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
    justify-content: flex-end;
  }

  .admin-table .user-avatar {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-sm);
  }

  /* Book info styling in mobile cards */
  .admin-table .book-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
    justify-content: flex-end;
  }

  .admin-table .book-preview-swatch {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
  }

  /* Action buttons in mobile cards */
  .admin-table td .action-buttons,
  .admin-table td .btn-group {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    justify-content: flex-end;
    width: 100%;
  }

  .admin-table td .btn-sm {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    white-space: nowrap;
  }

  /* Badges in mobile cards */
  .admin-table .badge {
    font-size: var(--font-size-xs);
    padding: 4px 8px;
  }

  /* Code elements in mobile cards */
  .admin-table code {
    font-size: var(--font-size-xs);
    word-break: break-all;
  }

  /* Theme preview in mobile cards */
  .admin-table .theme-preview {
    display: flex;
    gap: 4px;
    justify-content: flex-end;
  }

  .admin-table .color-dot {
    width: 20px;
    height: 20px;
  }

  /* Stats grid single column */
  .stats-grid {
    grid-template-columns: 1fr !important;
  }

  /* Tools grid single column */
  .tools-grid {
    grid-template-columns: 1fr !important;
  }
}


/* Admin sidebar footer */
.admin-sidebar-footer {
  margin-top: auto;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

/* Added by Knowledge Base Page Fix */
.btn-danger {
  background-color: var(--color-error);
  color: white;
}
.btn-danger:hover {
  background-color: #dc2626;
  color: white;
}

.flex-1 {
  flex: 1;
}