/*
 * Tanaghum - تناغم
 * Main Stylesheet
 * Arabic Multimodal Learning Material Generator
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */

:root {
  color-scheme: dark;

  /* Colors — Dark-first Zinc/Indigo palette */
  --color-primary: #6366f1;
  --color-primary-light: #818cf8;
  --color-primary-dark: #4f46e5;
  --color-accent: #8b5cf6;
  --color-accent-light: #a78bfa;
  --color-primary-text: #818cf8;
  --color-gradient-start: #09090b;
  --color-gradient-end: #18181b;

  --color-bg: #09090b;
  --color-bg-alt: #18181b;
  --color-surface: #18181b;
  --color-surface-elevated: #27272a;

  --color-text: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #a1a1aa;
  --color-text-inverse: #09090b;

  --color-border: #27272a;
  --color-border-light: rgba(255, 255, 255, 0.06);
  --color-surface-hover: #3f3f46;

  --color-success: #22c55e;
  --color-warning: #eab308;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  --color-warning-bg: rgba(234, 179, 8, 0.1);
  --color-border-hover: #3f3f46;

  /* Shadows — Minimal on dark */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  --shadow-glow-accent: 0 0 20px rgba(139, 92, 246, 0.2);

  /* Gradients */
  --gradient-accent: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-surface: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(139, 92, 246, 0.04));

  /* Typography */
  --font-arabic: 'Noto Naskh Arabic', 'Amiri', 'Traditional Arabic', serif;
  --font-english: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 0.9375rem;
  --text-lg: 1.0625rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;

  --line-height-tight: 1.15;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-arabic: 1.9;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal-backdrop: 300;
  --z-modal: 400;
  --z-toast: 1100;

  /* Layout */
  --max-width-sm: 640px;
  --max-width-md: 768px;
  --max-width-lg: 1024px;
  --max-width-xl: 1280px;
  --max-width-2xl: 1536px;

  --header-height: 56px;
  --sidebar-width: 280px;
}

/* Light Theme Override */
[data-theme="light"] {
  color-scheme: light;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f4f5;
  --color-surface: #ffffff;
  --color-surface-elevated: #f4f4f5;

  --color-text: #09090b;
  --color-text-secondary: #52525b;
  --color-text-muted: #71717a;
  --color-text-inverse: #ffffff;
  --color-primary-text: #4f46e5;

  --color-border: #e4e4e7;
  --color-border-light: #f4f4f5;
  --color-border-hover: #d4d4d8;
  --color-surface-hover: #e4e4e7;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

body {
  font-family: var(--font-english);
  font-size: var(--text-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  min-height: 100dvh;
  max-width: 100vw;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  animation: page-fade-in 0.4s ease;
}

@keyframes page-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Arabic Text */
[lang="ar"], .ar, .arabic {
  font-family: var(--font-arabic);
  line-height: var(--line-height-arabic);
  direction: rtl;
  text-align: right;
  letter-spacing: 0.01em;
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
  transition: box-shadow var(--transition-fast);
}

/* Selection */
::selection {
  background-color: rgba(99, 102, 241, 0.3);
  color: var(--color-text);
}

/* Focus visible only when using keyboard */
:focus:not(:focus-visible) {
  outline: none;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); font-weight: 800; }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

/* Arabic Headings */
h1.ar, h2.ar, h3.ar, h4.ar, h5.ar, h6.ar {
  font-family: var(--font-arabic);
  font-weight: 700;
  letter-spacing: 0;
  line-height: var(--line-height-arabic);
}

p {
  margin-bottom: var(--space-4);
}

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

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

strong, b {
  font-weight: 600;
}

small {
  font-size: var(--text-sm);
}

code, pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

code {
  background-color: var(--color-bg-alt);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

pre {
  background-color: var(--color-bg-alt);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

/* ============================================
   Layout Utilities
   ============================================ */

.container {
  width: 100%;
  max-width: var(--max-width-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.container-sm { max-width: var(--max-width-sm); }
.container-md { max-width: var(--max-width-md); }
.container-lg { max-width: var(--max-width-lg); }

/* Flexbox */
.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-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Grid */
.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); }

/* Spacing */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.my-4 { margin-top: var(--space-4); margin-bottom: var(--space-4); }
.my-8 { margin-top: var(--space-8); margin-bottom: var(--space-8); }

.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.py-16 { padding-top: var(--space-16); padding-bottom: var(--space-16); }

/* Display */
.hidden { display: none !important; }
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Visibility */
.sr-only,
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   Components: Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-english);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
  position: relative;
}

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

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.2);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--color-text-muted);
  background-color: rgba(255, 255, 255, 0.03);
  transform: translateY(-1px);
}

.btn-secondary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-accent {
  background: var(--gradient-accent);
  color: #ffffff;
  box-shadow: 0 0 16px rgba(139, 92, 246, 0.25);
}

.btn-accent:hover:not(:disabled) {
  box-shadow: 0 0 24px rgba(139, 92, 246, 0.4);
  transform: translateY(-1px);
}

.btn-accent:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 0 8px rgba(139, 92, 246, 0.2);
}

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

.btn-ghost:hover:not(:disabled) {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.06);
}

.btn-ghost:active:not(:disabled) {
  background-color: rgba(255, 255, 255, 0.03);
}

.btn-danger {
  background: var(--color-error);
  color: #ffffff;
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.2);
}

.btn-danger:hover:not(:disabled) {
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.35);
  transform: translateY(-1px);
}

.btn-danger:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.2);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn-icon {
  padding: var(--space-3);
  border-radius: var(--radius-full);
}

.btn-icon:hover:not(:disabled) {
  background-color: rgba(255, 255, 255, 0.06);
}

/* ============================================
   Components: Forms
   ============================================ */

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-label.ar {
  font-family: var(--font-arabic);
  text-align: right;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--text-sm);
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

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

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-input.ar,
.form-textarea.ar {
  font-family: var(--font-arabic);
  direction: rtl;
  text-align: right;
}

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

.form-hint {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.form-error {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-error);
}

/* Radio & Checkbox */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.form-check input[type="radio"],
.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
}

/* Range Slider */
.form-range {
  width: 100%;
  height: 6px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  appearance: none;
}

.form-range::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.4);
  border: 2px solid var(--color-bg);
  transition: all var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.6);
}

.form-range::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.4);
  border: 2px solid var(--color-bg);
  transition: all var(--transition-fast);
}

.form-range::-moz-range-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.6);
}

/* ============================================
   Components: Cards
   ============================================ */

.card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

.card-elevated {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-border);
}

.card-elevated:hover {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: var(--shadow-glow);
}

.card-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: 600;
}

.card-body {
  flex: 1;
}

.card-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

/* ============================================
   Components: Header & Navigation
   ============================================ */

.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
  background-color: rgba(9, 9, 11, 0.8);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  height: 100%;
  max-width: var(--max-width-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.logo:hover {
  transform: scale(1.02);
}

.logo-arabic {
  font-family: var(--font-arabic);
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link.active {
  color: var(--color-text);
}

/* ============================================
   Components: Auth / User Menu
   ============================================ */

.auth-section {
  display: flex;
  align-items: center;
  margin-left: var(--space-4);
}

.google-signin-container {
  display: flex;
  align-items: center;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  position: relative;
}

.user-avatar {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
  object-fit: cover;
}

.user-avatar:hover {
  border-color: var(--color-text-muted);
}

.user-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  min-width: 200px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  padding: var(--space-2) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}

.user-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.user-dropdown-item:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.user-dropdown-item svg {
  flex-shrink: 0;
  opacity: 0.6;
}

.user-dropdown-item:hover svg {
  opacity: 1;
}

.user-dropdown-link {
  text-decoration: none;
}

.user-dropdown-danger {
  color: var(--color-error);
}

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

.user-dropdown-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: var(--space-2) 0;
}

.user-dropdown-email {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  border-bottom: none;
  font-weight: 500;
}

.user-dropdown-quota {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  margin-bottom: var(--space-1);
}

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

.dropdown-quota-value {
  font-weight: 600;
  color: var(--color-text-secondary);
}

.dropdown-quota-value.quota-good {
  color: var(--color-success, #16a34a);
}

.dropdown-quota-value.quota-mid {
  color: var(--color-warning, #d97706);
}

.dropdown-quota-value.quota-low {
  color: var(--color-error, #dc3545);
}

/* Auth section hidden states */
.auth-section[data-state="loading"] .google-signin-container,
.auth-section[data-state="loading"] .user-menu {
  display: none;
}

.auth-section[data-state="logged-out"] .user-menu {
  display: none;
}

.auth-section[data-state="logged-in"] .google-signin-container {
  display: none;
}

/* ============================================
   Components: Settings Panel
   ============================================ */

.settings-modal {
  max-width: 540px;
}

.settings-modal .modal-body {
  max-height: 70vh;
  overflow-y: auto;
}

.settings-section {
  margin-bottom: var(--space-6);
}

.settings-section:last-child {
  margin-bottom: 0;
}

.settings-section-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.settings-section-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.settings-key-item {
  padding: var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
}

.settings-key-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.settings-key-name {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
}

.settings-key-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.settings-key-status {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.settings-key-status[data-status="active"] {
  background: rgba(34, 197, 94, 0.1);
  color: var(--color-success);
}

.settings-key-status[data-status="none"] {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
}

.settings-key-form {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.settings-key-input {
  flex: 1;
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
}

.settings-key-input.input-error {
  border-color: var(--color-error);
  animation: shake 0.3s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.settings-key-link {
  font-size: var(--text-xs);
  color: var(--color-primary-text);
  text-decoration: none;
}

.settings-key-link:hover {
  text-decoration: underline;
}

.settings-quota-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.settings-quota-tier {
  font-size: var(--text-sm);
  font-weight: 600;
}

.settings-quota-usage {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.settings-quota-bar {
  height: 6px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.settings-quota-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

/* ============================================
   Components: Progress Indicators
   ============================================ */

.progress-bar {
  width: 100%;
  height: 4px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  animation: shimmer 2s infinite;
}

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

.progress-steps {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  z-index: 1;
}

.progress-step-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-normal);
  color: var(--color-text-muted);
}

.progress-step.active .progress-step-circle {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
}

.progress-step.completed .progress-step-circle {
  background: var(--color-success);
  border-color: var(--color-success);
  color: var(--color-text-inverse);
}

.progress-step-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============================================
   Components: Badges & Tags
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  background-color: var(--color-surface-elevated);
  color: var(--color-text-secondary);
}

.badge-primary {
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-primary-light);
}

.badge-success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--color-success);
}

.badge-warning {
  background: rgba(234, 179, 8, 0.15);
  color: var(--color-warning);
}

.badge-error {
  background: rgba(239, 68, 68, 0.15);
  color: var(--color-error);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  color: var(--color-primary-light);
}

.tag:hover {
  background: rgba(99, 102, 241, 0.12);
  border-color: rgba(99, 102, 241, 0.25);
}

/* ============================================
   Components: Toast Notifications
   ============================================ */

.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (max-width: 768px) {
  .toast-container {
    bottom: calc(70px + var(--space-4));
    right: var(--space-3);
    left: var(--space-3);
  }
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-surface-elevated);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: toast-in 0.3s ease;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.toast-success {
  border-left: 3px solid var(--color-success);
}

.toast-warning {
  border-left: 3px solid var(--color-warning);
}

.toast-error {
  border-left: 3px solid var(--color-error);
}

.toast-info {
  border-left: 3px solid var(--color-info);
}

/* ============================================
   Components: Modal
   ============================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal), backdrop-filter var(--transition-normal);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: var(--z-modal);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.modal.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  border-top: 1px solid var(--color-border-light);
}

/* ============================================
   Responsive Breakpoints
   ============================================ */

@media (max-width: 640px) {
  :root {
    --header-height: 56px;
  }

  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }

  .container {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }

  .hide-mobile { display: none !important; }

  .nav {
    gap: var(--space-3);
  }

  .nav-link {
    font-size: var(--text-xs);
  }

  .header-inner {
    padding: 0 var(--space-3);
  }

  .logo {
    font-size: var(--text-base);
    gap: var(--space-2);
  }

  .logo-arabic {
    font-size: var(--text-lg);
  }

  /* Ensure touch targets on mobile */
  .btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
  }

  .user-name {
    display: none;
  }

  .google-signin-container {
    transform: scale(0.75);
    transform-origin: right center;
  }

  .auth-section {
    margin-left: var(--space-1);
  }
}

/* Extra small screens - prevent nav overflow */
@media (max-width: 380px) {
  .nav {
    gap: var(--space-1);
  }

  .nav-link {
    font-size: 9px;
    padding: var(--space-1);
  }

  .google-signin-container {
    transform: scale(0.65);
    transform-origin: right center;
  }

  .logo {
    font-size: var(--text-xs);
  }

  .logo-arabic {
    font-size: var(--text-sm);
  }

  .header-inner {
    padding: 0 var(--space-1);
    gap: var(--space-1);
  }
}

/* Very narrow screens (320px) - hide some nav links */
@media (max-width: 340px) {
  .nav-link:not(.active):not(:first-child) {
    display: none;
  }

  .nav {
    gap: var(--space-1);
  }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .hide-tablet { display: none !important; }
}

@media (min-width: 1025px) {
  .hide-desktop { display: none !important; }

  .grid-desktop-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-desktop-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-desktop-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================
   Animations
   ============================================ */

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

@keyframes bounce-in {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    transform: scale(1);
  }
}

.animate-fade-in { animation: fade-in 0.4s ease; }
.animate-slide-up { animation: slide-up 0.5s cubic-bezier(0.4, 0, 0.2, 1); }
.animate-bounce-in { animation: bounce-in 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55); }
.animate-pulse { animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite; }

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ============================================
   ILR Level Colors
   ============================================ */

.ilr-1 { --ilr-color: #22c55e; }
.ilr-1-plus { --ilr-color: #16a34a; }
.ilr-2 { --ilr-color: #3b82f6; }
.ilr-2-plus { --ilr-color: #2563eb; }
.ilr-3 { --ilr-color: #a855f7; }
.ilr-3-plus { --ilr-color: #7c3aed; }

.ilr-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  background: rgba(99, 102, 241, 0.15); /* fallback for browsers without color-mix */
  background: color-mix(in srgb, var(--ilr-color) 15%, transparent);
  color: var(--ilr-color);
  border: 1px solid rgba(99, 102, 241, 0.25); /* fallback */
  border: 1px solid color-mix(in srgb, var(--ilr-color) 25%, transparent);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.ilr-badge:hover {
  background: rgba(99, 102, 241, 0.2); /* fallback */
  background: color-mix(in srgb, var(--ilr-color) 20%, transparent);
}

/* ============================================
   Utility Classes - Premium Effects
   ============================================ */

.glass-effect {
  background: rgba(255, 255, 255, 0.03);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-border {
  position: relative;
  border: 1px solid transparent;
  background-clip: padding-box;
}

.gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  margin: -1px;
  border-radius: inherit;
  background: var(--gradient-accent);
}

.elevated-hover {
  transition: all var(--transition-normal);
}

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

.success-glow {
  box-shadow: 0 0 20px rgba(34, 197, 94, 0.3);
}

.accent-glow {
  box-shadow: var(--shadow-glow-accent);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border-light);
  color: var(--color-text-secondary);
  padding: var(--space-8) 0 var(--space-6);
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--space-4);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: var(--text-lg);
}

.footer-logo-arabic {
  font-family: var(--font-arabic);
  font-size: var(--text-xl);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

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

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  margin: 0;
}

@media (max-width: 640px) {
  .footer-content {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ============================================
   Print Styles
   ============================================ */

/* ============================================
   Reduced Motion Preferences
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .spinner {
    animation: none;
  }

  .progress-bar-fill::after {
    animation: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ============================================
   Toast Component Styles
   ============================================ */

.toast-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
}

.toast-title {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.toast-message {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.toast-close {
  background: none;
  border: none;
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-1);
  margin: calc(-1 * var(--space-1));
  border-radius: var(--radius-sm);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.toast-close:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-text);
}

.toast-close:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================
   Enhanced Accessibility - Focus States
   ============================================ */

/* Ensure all interactive elements have visible focus */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[role="button"]:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

/* Skip to main content link for screen readers */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  z-index: calc(var(--z-modal) + 1);
  font-weight: 600;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ============================================
   Touch Target Improvements
   ============================================ */

/* Ensure minimum touch target size of 44px */
@media (pointer: coarse) {
  .btn {
    min-height: 44px;
    min-width: 44px;
  }

  .btn-sm {
    min-height: 44px;
    padding: var(--space-2) var(--space-4);
  }

  .btn-icon {
    min-width: 44px;
    min-height: 44px;
  }

  .nav-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .form-check input[type="radio"],
  .form-check input[type="checkbox"] {
    width: 24px;
    height: 24px;
  }
}

/* ============================================
   Improved Color Contrast
   ============================================ */

/* Use accessible colors for important text */
.form-hint {
  color: var(--color-text-muted);
}
.form-error {
  color: var(--color-error);
}

/* ============================================
   Light Theme - Component Overrides
   ============================================ */

[data-theme="light"] .header {
  background-color: rgba(255, 255, 255, 0.8);
  border-bottom-color: var(--color-border);
}

[data-theme="light"] .toast {
  background-color: var(--color-surface);
  border-color: var(--color-border);
}

[data-theme="light"] .card {
  background: var(--color-surface);
  border-color: var(--color-border);
}

[data-theme="light"] .btn-secondary {
  border-color: var(--color-border);
}

[data-theme="light"] .btn-secondary:hover:not(:disabled) {
  background-color: var(--color-bg-alt);
}

[data-theme="light"] .btn-ghost:hover:not(:disabled) {
  background-color: var(--color-bg-alt);
}

/* ============================================
   High Contrast Mode Support
   ============================================ */

@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
    --color-border-light: #333333;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
  }

  .btn {
    border: 2px solid currentColor;
  }

  .btn-primary {
    background: var(--color-primary-dark);
    border-color: var(--color-text-inverse);
  }

  .card {
    border-width: 2px;
  }

  .form-input,
  .form-textarea,
  .form-select {
    border-width: 2px;
  }

  :focus-visible {
    outline-width: 3px;
  }
}

@media (prefers-contrast: high) {
  :root {
    --color-border: #ffffff;
    --color-border-light: #cccccc;
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .no-print { display: none !important; }

  body {
    background: white;
    color: black;
  }

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