/* =========================================
   OSHA Practice Site - Design System
   Mobile-First, Modern, Safety-Themed
   ========================================= */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Outfit:wght@500;600;700;800&display=swap');

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Colors */
  --color-primary: #1e3a5f;
  --color-primary-dark: #152a45;
  --color-primary-light: #2d5a8a;
  --color-accent: #f97316;
  --color-accent-dark: #ea580c;
  --color-accent-light: #fb923c;
  --color-success: #10b981;
  --color-success-light: #d1fae5;
  --color-danger: #ef4444;
  --color-danger-light: #fee2e2;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;

  /* Neutrals */
  --color-white: #ffffff;
  --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;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1e3a5f 0%, #2d5a8a 100%);
  --gradient-accent: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
  --gradient-hero: linear-gradient(135deg, #1e3a5f 0%, #0f172a 100%);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* 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;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(249, 115, 22, 0.15);

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

  /* Container */
  --container-max: 1200px;
  --container-padding: 1.5rem;
}

/* Reset & Base Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-gray-900);
}

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

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

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

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

@media (min-width: 768px) {
  h1 {
    font-size: var(--text-5xl);
  }

  h2 {
    font-size: var(--text-4xl);
  }

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

p {
  margin-bottom: var(--space-4);
  color: var(--color-gray-600);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* =========================================
   HEADER & NAVIGATION
   ========================================= */
.header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--color-primary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
}

.nav {
  display: none;
}

.nav-list {
  display: flex;
  gap: var(--space-8);
}

.nav-link {
  font-weight: 500;
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-link:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-gray-700);
  border-radius: 2px;
  transition: var(--transition-base);
}

@media (min-width: 768px) {
  .nav {
    display: block;
  }

  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
  z-index: 99;
}

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

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-weight: 500;
  color: var(--color-gray-700);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

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

/* =========================================
   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-body);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-md), 0 4px 14px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 8px 20px rgba(249, 115, 22, 0.4);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

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

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

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

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

/* =========================================
   HERO SECTION
   ========================================= */
.hero {
  background: var(--gradient-hero);
  padding: var(--space-16) 0 var(--space-20);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(45, 90, 138, 0.3) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-6);
}

.hero-description {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

@media (min-width: 640px) {
  .hero-cta {
    flex-direction: row;
    justify-content: center;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

/* =========================================
   FEATURES SECTION
   ========================================= */
.features {
  padding: var(--space-16) 0;
  background: var(--color-white);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-12);
}

.section-label {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.features-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: var(--color-gray-50);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: all var(--transition-base);
  border: 1px solid transparent;
}

.feature-card:hover {
  background: var(--color-white);
  border-color: var(--color-gray-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  font-size: var(--text-2xl);
}

.feature-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.feature-card p {
  font-size: var(--text-sm);
  margin-bottom: 0;
}

/* =========================================
   PRACTICE LINKS SECTION
   ========================================= */
.practice-links {
  padding: var(--space-16) 0;
  background: var(--color-gray-50);
}

.practice-grid {
  display: grid;
  gap: var(--space-6);
}

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

.practice-card {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  border: 2px solid var(--color-gray-200);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.practice-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.practice-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
  transform: translateY(-4px);
}

.practice-card:hover::before {
  opacity: 1;
}

.practice-card-badge {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.practice-card h3 {
  margin-bottom: var(--space-3);
}

.practice-card p {
  margin-bottom: var(--space-6);
}

.question-count {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-6);
}

/* =========================================
   EMAIL CAPTURE SECTION
   ========================================= */
.email-capture {
  padding: var(--space-16) 0;
  background: var(--gradient-hero);
  position: relative;
}

.email-capture::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at right, rgba(249, 115, 22, 0.1) 0%, transparent 50%);
}

.email-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.email-content h2 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.email-content p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
}

.email-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 450px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .email-form {
    flex-direction: row;
  }
}

.email-input {
  flex: 1;
  padding: var(--space-4) var(--space-5);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: var(--font-body);
  background: var(--color-white);
  color: var(--color-gray-900);
}

.email-input::placeholder {
  color: var(--color-gray-400);
}

.email-input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.email-form .btn {
  white-space: nowrap;
}

/* =========================================
   QUESTION CARDS (Practice Pages)
   ========================================= */
.practice-page {
  padding: var(--space-12) 0;
}

.practice-intro {
  background: var(--gradient-hero);
  padding: var(--space-12) 0;
  margin-bottom: var(--space-10);
}

.practice-intro-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.practice-intro h1 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.practice-intro p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-lg);
}

.question-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}

.question-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.question-card:hover {
  box-shadow: var(--shadow-lg);
}

.question-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--gradient-primary);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.question-text {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--space-5);
  line-height: 1.5;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.option {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-fast);
  cursor: default;
}

.option:hover {
  background: var(--color-gray-100);
  border-color: var(--color-gray-300);
}

.option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.option-text {
  flex: 1;
  color: var(--color-gray-700);
  line-height: 1.5;
  padding-top: 2px;
}

.show-answer-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  font-weight: 600;
  font-size: var(--text-sm);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.show-answer-btn.active {
  background: var(--color-success);
  color: var(--color-white);
}

.answer-section {
  display: none;
  margin-top: var(--space-5);
  padding: var(--space-5);
  background: var(--color-success-light);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-success);
  animation: fadeIn 0.3s ease;
}

.answer-section.visible {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

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

.correct-answer {
  font-weight: 700;
  color: var(--color-success);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.correct-answer::before {
  content: '✓';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--color-success);
  color: white;
  border-radius: 50%;
  font-size: var(--text-sm);
}

.explanation {
  color: var(--color-gray-700);
  line-height: 1.7;
  margin: 0;
}

/* Practice Page Bottom CTA */
.practice-cta {
  max-width: 800px;
  margin: var(--space-12) auto 0;
  padding: var(--space-8);
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  text-align: center;
}

.practice-cta h3 {
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.practice-cta p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-6);
}

/* =========================================
   FOOTER
   ========================================= */
.footer {
  background: var(--color-gray-900);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-content {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

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

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-brand p {
  color: var(--color-gray-400);
  font-size: var(--text-sm);
}

.footer-links h4 {
  color: var(--color-white);
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-gray-800);
}

.disclaimer {
  background: var(--color-gray-800);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
}

.disclaimer p {
  color: var(--color-gray-400);
  font-size: var(--text-xs);
  margin: 0;
  line-height: 1.6;
}

.copyright {
  text-align: center;
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

/* =========================================
   UTILITIES
   ========================================= */
.text-center {
  text-align: center;
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-8 {
  margin-top: var(--space-8);
}

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

.mb-8 {
  margin-bottom: var(--space-8);
}

/* Hide/Show Classes */
.hidden {
  display: none;
}

.visible {
  display: block;
}

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

/* Focus States */
*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background: var(--color-accent);
  color: var(--color-white);
}

/* =========================================
   DARK MODE
   ========================================= */
[data-theme="dark"] {
  --color-white: #1a1a2e;
  --color-gray-50: #16213e;
  --color-gray-100: #1a1a2e;
  --color-gray-200: #2d3748;
  --color-gray-300: #4a5568;
  --color-gray-400: #a0aec0;
  --color-gray-500: #cbd5e0;
  --color-gray-600: #e2e8f0;
  --color-gray-700: #edf2f7;
  --color-gray-800: #f7fafc;
  --color-gray-900: #ffffff;
  --gradient-hero: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 100%);
}

[data-theme="dark"] .header {
  background: rgba(26, 26, 46, 0.95);
  border-color: var(--color-gray-200);
}

[data-theme="dark"] .question-card {
  background: var(--color-gray-100);
  border-color: var(--color-gray-200);
}

[data-theme="dark"] .option {
  background: var(--color-gray-50);
  border-color: var(--color-gray-200);
}

[data-theme="dark"] .footer {
  background: #0f0f1a;
}

/* =========================================
   HIGH CONTRAST MODE
   ========================================= */
[data-contrast="high"] {
  --color-primary: #000080;
  --color-accent: #ff6600;
  --color-gray-600: #000000;
  --color-gray-700: #000000;
  --color-gray-800: #000000;
  --color-gray-900: #000000;
}

[data-contrast="high"] .btn-primary {
  background: #ff6600;
  border: 3px solid #000000;
}

[data-contrast="high"] .question-card {
  border: 3px solid #000000;
}

[data-contrast="high"] .option {
  border: 2px solid #000000;
}

[data-contrast="high"] a:focus,
[data-contrast="high"] button:focus {
  outline: 4px solid #ff6600;
  outline-offset: 4px;
}

/* =========================================
   LARGE TEXT MODE
   ========================================= */
[data-text="large"] {
  --text-xs: 0.9rem;
  --text-sm: 1rem;
  --text-base: 1.15rem;
  --text-lg: 1.3rem;
  --text-xl: 1.5rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.1rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.25rem;
}

[data-text="large"] body {
  line-height: 1.8;
}

[data-text="large"] .btn {
  padding: var(--space-4) var(--space-8);
}

/* =========================================
   ACCESSIBILITY PANEL
   ========================================= */
.accessibility-panel {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 1000;
}

.accessibility-toggle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: white;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base);
}

.accessibility-toggle:hover {
  transform: scale(1.1);
}

.accessibility-menu {
  display: none;
  position: absolute;
  bottom: 70px;
  right: 0;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  box-shadow: var(--shadow-xl);
  min-width: 220px;
  border: 1px solid var(--color-gray-200);
}

.accessibility-menu.active {
  display: block;
}

.accessibility-menu h4 {
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.accessibility-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3);
  margin-bottom: var(--space-2);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.accessibility-option:hover {
  background: var(--color-gray-100);
}

.accessibility-option span {
  font-size: var(--text-sm);
  font-weight: 500;
}

.toggle-switch {
  width: 44px;
  height: 24px;
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
  position: relative;
  transition: background var(--transition-fast);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition-fast);
}

.toggle-switch.active {
  background: var(--color-success);
}

.toggle-switch.active::after {
  transform: translateX(20px);
}

/* =========================================
   LANGUAGE TOGGLE
   ========================================= */
.language-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: var(--space-4);
}

.language-btn {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  background: transparent;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-gray-600);
}

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

.language-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* =========================================
   TABS (Full Access Page)
   ========================================= */
.tabs-container {
  max-width: 800px;
  margin: 0 auto;
}

.tabs-nav {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  border-bottom: 2px solid var(--color-gray-200);
  padding-bottom: var(--space-2);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--space-3) var(--space-6);
  font-weight: 600;
  font-size: var(--text-sm);
  background: transparent;
  border: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-gray-500);
  white-space: nowrap;
}

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

.tab-btn.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  background: rgba(30, 58, 95, 0.1);
  border-bottom: 3px solid var(--color-primary);
  margin-bottom: -2px;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* =========================================
   BOOKMARK NOTICE
   ========================================= */
.bookmark-notice {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border: 2px solid #f59e0b;
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.bookmark-notice-icon {
  font-size: 2rem;
}

.bookmark-notice-text h4 {
  color: #92400e;
  margin-bottom: var(--space-1);
}

.bookmark-notice-text p {
  color: #a16207;
  margin: 0;
  font-size: var(--text-sm);
}

/* =========================================
   PAID ACCESS CTA
   ========================================= */
.paid-cta {
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  text-align: center;
  margin: var(--space-8) 0;
  box-shadow: 0 8px 30px rgba(249, 115, 22, 0.3);
}

.paid-cta h3 {
  color: white;
  margin-bottom: var(--space-3);
}

.paid-cta p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-6);
}

.paid-cta .btn {
  background: white;
  color: #ea580c;
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-10);
}

.paid-cta .btn:hover {
  background: #fef3c7;
  transform: translateY(-2px);
}

/* Locked explanation style */
.locked-explanation {
  background: var(--color-gray-100);
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
  margin-top: var(--space-4);
}

.locked-explanation p {
  margin: 0;
  color: var(--color-gray-500);
  font-style: italic;
}

.locked-explanation a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
}

/* =========================================
   EXAM SELECTION PAGE
   ========================================= */
.exam-selection {
  text-align: center;
  padding: var(--space-8) 0;
}

.exam-selection h2 {
  margin-bottom: var(--space-3);
}

.exam-selection>p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-10);
}

.exam-cards {
  display: grid;
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .exam-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.exam-card {
  background: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
}

.exam-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
  transform: translateY(-4px);
}

.exam-card-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
}

.exam-card h3 {
  margin-bottom: var(--space-2);
}

.exam-card>p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-6);
}

.exam-features {
  text-align: left;
  margin-bottom: var(--space-6);
}

.exam-features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  color: var(--color-gray-700);
  font-size: var(--text-sm);
}

/* =========================================
   QUIZ CONTAINER
   ========================================= */
.quiz-container {
  max-width: 800px;
  margin: 0 auto;
}

.quiz-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-gray-200);
}

@media (min-width: 640px) {
  .quiz-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.quiz-progress {
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  font-weight: 500;
}

.quiz-questions {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.quiz-question-card {
  background: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.quiz-question-card.correct {
  border-color: var(--color-success);
  background: rgba(16, 185, 129, 0.05);
}

.quiz-question-card.incorrect {
  border-color: var(--color-danger);
  background: rgba(239, 68, 68, 0.05);
}

.quiz-question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.quiz-question-number {
  font-weight: 700;
  color: var(--color-primary);
  font-size: var(--text-sm);
}

.quiz-question-status {
  font-weight: 600;
  font-size: var(--text-sm);
}

.status-correct {
  color: var(--color-success);
}

.status-incorrect {
  color: var(--color-danger);
}

.quiz-question-text {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--space-5);
  line-height: 1.5;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.quiz-options.true-false {
  flex-direction: row;
  gap: var(--space-4);
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-gray-50);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.quiz-option:hover {
  background: var(--color-gray-100);
  border-color: var(--color-gray-300);
}

.quiz-option.selected {
  background: rgba(30, 58, 95, 0.1);
  border-color: var(--color-primary);
}

.quiz-option.correct-answer {
  background: var(--color-success-light);
  border-color: var(--color-success);
}

.quiz-option.wrong-answer {
  background: var(--color-danger-light);
  border-color: var(--color-danger);
}

.quiz-option input[type="radio"] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
}

.quiz-option .option-marker {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: white;
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}

.quiz-option .option-text {
  flex: 1;
  color: var(--color-gray-800);
  line-height: 1.5;
}

.quiz-feedback {
  margin-top: var(--space-5);
  padding: var(--space-5);
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-primary);
}

.quiz-feedback .correct-answer-text {
  font-weight: 600;
  color: var(--color-success);
  margin-bottom: var(--space-3);
}

.quiz-feedback .explanation {
  color: var(--color-gray-700);
  line-height: 1.7;
  margin: 0;
}

.quiz-actions {
  margin-top: var(--space-8);
  text-align: center;
}

/* =========================================
   QUIZ RESULTS
   ========================================= */
.quiz-results {
  margin-top: var(--space-8);
}

.results-card {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  text-align: center;
  border: 3px solid var(--color-gray-200);
  box-shadow: var(--shadow-xl);
}

.results-card.passed {
  border-color: var(--color-success);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.results-card.failed {
  border-color: var(--color-danger);
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.05) 0%, rgba(239, 68, 68, 0.1) 100%);
}

.results-card h3 {
  margin-bottom: var(--space-6);
  color: var(--color-gray-900);
}

.score-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

@media (min-width: 480px) {
  .score-display {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-8);
  }
}

.score-fraction {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-gray-900);
}

.score-fraction .score-divider {
  color: var(--color-gray-400);
  margin: 0 var(--space-2);
}

.score-percentage {
  font-size: var(--text-5xl);
  font-weight: 800;
}

.score-percentage.pass {
  color: var(--color-success);
}

.score-percentage.fail {
  color: var(--color-danger);
}

.score-message {
  font-size: var(--text-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--space-8);
}

.results-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (min-width: 480px) {
  .results-actions {
    flex-direction: row;
    justify-content: center;
  }
}

/* =========================================
   DARK MODE - ENHANCED LEGIBILITY
   ========================================= */
[data-theme="dark"] body {
  background-color: #0f172a;
  color: #e2e8f0;
}

[data-theme="dark"] .question-text,
[data-theme="dark"] .quiz-question-text {
  color: #f1f5f9;
}

[data-theme="dark"] .option-text,
[data-theme="dark"] .quiz-option .option-text {
  color: #e2e8f0;
}

[data-theme="dark"] p {
  color: #cbd5e1;
}

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4 {
  color: #f8fafc;
}

[data-theme="dark"] .btn-secondary {
  background: transparent;
  color: #f1f5f9;
  border-color: #64748b;
}

[data-theme="dark"] .btn-secondary:hover {
  background: #1e293b;
  border-color: #94a3b8;
}

[data-theme="dark"] .nav-link {
  color: #cbd5e1;
}

[data-theme="dark"] .nav-link:hover {
  color: #f8fafc;
}

[data-theme="dark"] .mobile-menu-btn span {
  background: #e2e8f0;
}

[data-theme="dark"] .mobile-nav {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .mobile-nav-link {
  color: #e2e8f0;
  background: #0f172a;
}

[data-theme="dark"] .mobile-nav-link:hover {
  background: var(--color-primary);
}

[data-theme="dark"] .question-card,
[data-theme="dark"] .quiz-question-card {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .option,
[data-theme="dark"] .quiz-option {
  background: #0f172a;
  border-color: #334155;
}

[data-theme="dark"] .option:hover,
[data-theme="dark"] .quiz-option:hover {
  background: #1e293b;
  border-color: #475569;
}

[data-theme="dark"] .quiz-option.selected {
  background: rgba(59, 130, 246, 0.2);
  border-color: #3b82f6;
}

[data-theme="dark"] .quiz-option.correct-answer {
  background: rgba(16, 185, 129, 0.2);
  border-color: #10b981;
}

[data-theme="dark"] .quiz-option.wrong-answer {
  background: rgba(239, 68, 68, 0.2);
  border-color: #ef4444;
}

[data-theme="dark"] .show-answer-btn {
  background: #334155;
  color: #e2e8f0;
}

[data-theme="dark"] .show-answer-btn:hover {
  background: var(--color-primary);
  color: white;
}

[data-theme="dark"] .answer-section {
  background: rgba(16, 185, 129, 0.15);
  border-color: #10b981;
}

[data-theme="dark"] .explanation {
  color: #e2e8f0;
}

[data-theme="dark"] .feature-card {
  background: #1e293b;
}

[data-theme="dark"] .feature-card:hover {
  background: #0f172a;
  border-color: #475569;
}

[data-theme="dark"] .practice-card,
[data-theme="dark"] .exam-card {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .practice-card:hover,
[data-theme="dark"] .exam-card:hover {
  border-color: var(--color-accent);
}

[data-theme="dark"] .exam-features li {
  color: #cbd5e1;
}

[data-theme="dark"] .accessibility-menu {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .accessibility-option {
  background: #0f172a;
}

[data-theme="dark"] .accessibility-option:hover {
  background: #334155;
}

[data-theme="dark"] .accessibility-option span {
  color: #e2e8f0;
}

[data-theme="dark"] .language-btn {
  color: #cbd5e1;
  border-color: #475569;
}

[data-theme="dark"] .language-btn:hover {
  color: #f8fafc;
  border-color: #94a3b8;
}

[data-theme="dark"] .locked-explanation {
  background: #1e293b;
  border-color: #475569;
}

[data-theme="dark"] .locked-explanation p {
  color: #94a3b8;
}

[data-theme="dark"] .quiz-feedback {
  background: #1e293b;
  border-color: #3b82f6;
}

[data-theme="dark"] .quiz-feedback .explanation {
  color: #e2e8f0;
}

[data-theme="dark"] .results-card {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .results-card.passed {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.15) 100%);
  border-color: #10b981;
}

[data-theme="dark"] .results-card.failed {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.15) 100%);
  border-color: #ef4444;
}

[data-theme="dark"] .score-fraction {
  color: #f8fafc;
}

[data-theme="dark"] .quiz-progress {
  color: #94a3b8;
}

[data-theme="dark"] .quiz-question-number {
  color: #60a5fa;
}

[data-theme="dark"] .tab-btn {
  color: #94a3b8;
}

[data-theme="dark"] .tab-btn:hover {
  color: #e2e8f0;
  background: #1e293b;
}

[data-theme="dark"] .tab-btn.active {
  color: #60a5fa;
  background: rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .bookmark-notice {
  background: linear-gradient(135deg, #422006 0%, #78350f 100%);
  border-color: #f59e0b;
}

[data-theme="dark"] .bookmark-notice-text h4 {
  color: #fcd34d;
}

[data-theme="dark"] .bookmark-notice-text p {
  color: #fbbf24;
}