/* CSS Variables for theming */
:root {
  /* Colors */
  --color-primary: #0078d4;
  --color-primary-dark: #005a9e;
  --color-secondary: #50e3c2;
  --color-text: #1a1a1a;
  --color-text-light: #666;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-border: #e1e4e8;
  --color-success: #28a745;
  --color-error: #dc3545;

  /* Spacing scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Courier New", Courier, monospace;

  --text-xs: 0.875rem;
  --text-sm: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3rem;

  /* Layout */
  --container-width: 1200px;
  --border-radius: 8px;
  --header-height: 80px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition: all 0.3s ease;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #f0f0f0;
    --color-text-light: #b0b0b0;
    --color-bg: #1a1a1a;
    --color-bg-alt: #2a2a2a;
    --color-border: #3a3a3a;
  }
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

h1 {
  font-size: var(--text-4xl);
}
h2 {
  font-size: var(--text-3xl);
}
h3 {
  font-size: var(--text-2xl);
}
h4 {
  font-size: var(--text-xl);
}
h5 {
  font-size: var(--text-lg);
}
h6 {
  font-size: var(--text-md);
}

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

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

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

a:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

ul,
ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

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

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

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

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

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

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

.btn-block {
  display: block;
  width: 100%;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background-color: var(--color-text);
  transition: var(--transition);
}

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

.main-nav ul {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--space-xs) 0;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-primary);
}

/* Hero Section */
.hero {
  padding: var(--space-3xl) 0;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-content h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Page Hero */
.page-hero {
  padding: var(--space-2xl) 0;
  background-color: var(--color-bg-alt);
  text-align: center;
}

.page-hero h1 {
  margin-bottom: var(--space-sm);
}

.lead {
  font-size: var(--text-lg);
  color: var(--color-text-light);
}

/* Content Sections */
section {
  padding: var(--space-3xl) 0;
}

.content-section,
.benefits-section,
.audience-section,
.prerequisites-section,
.learning-outcomes-section,
.modules-section,
.pricing-section,
.instructor-bio,
.credentials-section,
.approach-section,
.philosophy-section,
.stats-section,
.contact-section,
.faq-content,
.error-section {
  padding: var(--space-3xl) 0;
}

/* Grid Layouts */
.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.features-grid,
.benefits-grid,
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

/* Feature Cards */
.feature-card,
.benefit-card,
.audience-card {
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.feature-card:hover,
.benefit-card:hover,
.audience-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.feature-card h3,
.benefit-card h3,
.audience-card h3 {
  margin-bottom: var(--space-sm);
}

.feature-card p,
.benefit-card p,
.audience-card p {
  margin-bottom: 0;
  color: var(--color-text-light);
}

/* Checklist */
.checklist {
  list-style: none;
  padding: 0;
}

.checklist li {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  position: relative;
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: bold;
}

/* Testimonials */
.testimonials {
  background-color: var(--color-bg-alt);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.testimonial {
  padding: var(--space-lg);
  background-color: var(--color-bg);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--color-primary);
}

.testimonial p {
  font-style: italic;
  margin-bottom: var(--space-md);
}

.testimonial cite {
  font-style: normal;
  color: var(--color-text-light);
  font-weight: 600;
}

/* CTA Section */
.cta-section {
  text-align: center;
  background-color: var(--color-primary);
  color: white;
}

.cta-section h2,
.cta-section p {
  color: white;
}

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

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

/* Prerequisites */
.prerequisites-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-lg);
}

.prereq-required,
.prereq-helpful {
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
}

.prereq-note {
  margin-top: var(--space-xl);
  padding: var(--space-md);
  background-color: var(--color-bg-alt);
  border-left: 4px solid var(--color-success);
  border-radius: var(--border-radius);
}

/* Learning Outcomes */
.outcomes-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.outcome-item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.outcome-number {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.3;
  min-width: 60px;
}

.outcome-content h3 {
  margin-bottom: var(--space-sm);
}

.outcome-content p {
  margin-bottom: 0;
  color: var(--color-text-light);
}

/* Curriculum Stats */
.curriculum-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.stat {
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
}

.stat-number {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

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

/* Modules */
.module {
  margin-bottom: var(--space-2xl);
  padding: var(--space-xl);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

.module-header {
  margin-bottom: var(--space-md);
}

.module-number {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-xs);
}

.module-header h2 {
  margin-bottom: 0;
}

.module-description {
  font-size: var(--text-md);
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}

.module-image {
  margin: var(--space-lg) 0;
}

.lessons-list {
  list-style: none;
  padding: 0;
}

.lessons-list li {
  padding: var(--space-sm) 0 var(--space-sm) var(--space-lg);
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

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

.lessons-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

.learning-outcome {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background-color: var(--color-bg);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--border-radius);
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.pricing-card {
  position: relative;
  padding: var(--space-xl);
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

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

.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: 20px;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
}

.pricing-header {
  text-align: center;
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-lg);
}

.pricing-header h2 {
  margin-bottom: var(--space-md);
}

.price {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 4px;
}

.currency {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-top: 8px;
}

.amount {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-primary);
}

.price-period {
  color: var(--color-text-light);
  font-size: var(--text-sm);
}

.pricing-features {
  flex: 1;
  margin-bottom: var(--space-lg);
}

.pricing-features h3 {
  font-size: var(--text-md);
  margin-bottom: var(--space-md);
}

.pricing-features ul {
  list-style: none;
  padding: 0;
}

.pricing-features li {
  padding: var(--space-sm) 0 var(--space-sm) var(--space-lg);
  position: relative;
}

.pricing-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: bold;
}

/* Guarantee */
.guarantee-section {
  background-color: var(--color-bg-alt);
}

.guarantee-content {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

/* FAQ on Pricing */
.faq-section .faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.faq-section .faq-item {
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
}

.faq-section .faq-item h3 {
  font-size: var(--text-md);
  margin-bottom: var(--space-sm);
}

.faq-section .faq-item p {
  margin-bottom: 0;
  color: var(--color-text-light);
  font-size: var(--text-sm);
}

.faq-more {
  text-align: center;
  margin-top: var(--space-xl);
}

/* Enrollment Steps */
.enrollment-section {
  background-color: var(--color-bg-alt);
}

.enrollment-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.step {
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background-color: var(--color-primary);
  color: white;
  font-size: var(--text-2xl);
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: var(--space-md);
}

/* About / Instructor Bio */
.bio-content {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.bio-image img {
  border-radius: var(--border-radius);
}

.credentials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.credential {
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
}

.credential h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.credential p {
  margin-bottom: 0;
  color: var(--color-text-light);
}

/* Approach */
.approach-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.approach-principle {
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
}

.approach-principle h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
}

.approach-principle p {
  margin-bottom: 0;
  color: var(--color-text-light);
}

/* Philosophy */
.philosophy-section {
  background-color: var(--color-bg-alt);
}

.philosophy-quote {
  font-size: var(--text-lg);
  font-style: italic;
  text-align: center;
  padding: var(--space-xl);
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-bg);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-xl);
}

.philosophy-quote p {
  margin-bottom: 0;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}

.stat-card {
  padding: var(--space-xl);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
  display: flex;
  flex-direction: column;
}

.stat-card .stat-number {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.stat-card .stat-label {
  color: var(--color-text-light);
}

/* FAQ Page */
.faq-content {
  max-width: 900px;
  margin: 0 auto;
}

.faq-category {
  margin-bottom: var(--space-3xl);
}

.faq-category h2 {
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: var(--space-xl);
}

.faq-content .faq-item {
  margin-bottom: var(--space-xl);
}

.faq-content .faq-item h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.faq-content .faq-item p {
  color: var(--color-text-light);
}

.faq-section-cta {
  text-align: center;
  margin-top: var(--space-2xl);
  padding: var(--space-xl);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-3xl);
}

.contact-info {
  padding-right: var(--space-lg);
}

.contact-methods {
  margin: var(--space-xl) 0;
}

.contact-method {
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
}

.contact-method h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-xs);
}

.contact-method p {
  margin-bottom: var(--space-xs);
}

.contact-method-note {
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

.contact-social {
  margin-top: var(--space-xl);
}

.social-links-large {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.social-links-large a {
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
  font-weight: 600;
}

/* Contact Form */
.contact-form-wrapper {
  background-color: var(--color-bg-alt);
  padding: var(--space-xl);
  border-radius: var(--border-radius);
}

.contact-form h2 {
  margin-bottom: var(--space-lg);
}

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

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

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

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-sm);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}

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

.error-message {
  display: none;
  color: var(--color-error);
  font-size: var(--text-xs);
  margin-top: var(--space-xs);
}

.error-message.visible {
  display: block;
}

.form-actions {
  margin-top: var(--space-xl);
}

.form-status {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  border-radius: var(--border-radius);
  display: none;
}

.form-status.success {
  display: block;
  background-color: rgba(40, 167, 69, 0.1);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.form-status.error {
  display: block;
  background-color: rgba(220, 53, 69, 0.1);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

/* FAQ CTA */
.faq-cta {
  text-align: center;
  padding: var(--space-2xl) 0;
  background-color: var(--color-bg-alt);
}

/* 404 Error */
.error-section {
  text-align: center;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-content {
  max-width: 600px;
}

.error-code {
  font-size: 6rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.error-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-xl);
}

/* Footer */
.site-footer {
  background-color: var(--color-text);
  color: white;
  padding: var(--space-3xl) 0 var(--space-lg);
  margin-top: var(--space-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand .logo {
  color: white;
  font-size: var(--text-2xl);
  margin-bottom: var(--space-md);
  display: block;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-sm);
}

.footer-domain {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--text-sm);
}

.footer-nav h3,
.footer-social h3 {
  color: white;
  font-size: var(--text-md);
  margin-bottom: var(--space-md);
}

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

.footer-nav li {
  margin-bottom: var(--space-xs);
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.8);
}

.footer-nav a:hover {
  color: white;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.social-links a {
  color: rgba(255, 255, 255, 0.8);
}

.social-links a:hover {
  color: white;
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}

.footer-legal {
  display: flex;
  gap: var(--space-lg);
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--text-sm);
}

.footer-legal a:hover {
  color: white;
}

/* Responsive Design - Mobile First */
@media (max-width: 768px) {
  :root {
    --text-4xl: 2rem;
    --text-3xl: 1.75rem;
    --text-2xl: 1.5rem;
    --space-3xl: 3rem;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-md);
    box-shadow: var(--shadow-md);
  }

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

  .main-nav ul {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .hero .container,
  .two-column,
  .prerequisites-content,
  .bio-content,
  .guarantee-content,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .hero-image {
    order: -1;
  }

  .curriculum-stats,
  .enrollment-steps,
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .hero-cta,
  .error-actions {
    flex-direction: column;
  }

  .btn-lg {
    width: 100%;
  }
}

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

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

/* Print Styles */
@media print {
  .site-header,
  .site-footer,
  .btn,
  .cta-section,
  .mobile-menu-toggle {
    display: none;
  }

  body {
    color: black;
    background: white;
  }

  a {
    text-decoration: underline;
  }
}
/* ===== Header logo styles ===== */
.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 40px;            /* оптимальная высота для хедера */
  width: auto;
  display: block;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.logo-img:hover,
.logo-img:focus {
  transform: scale(1.05);
  opacity: 0.9;
}

/* Если нужно, чтобы логотип и навигация были выровнены */
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Дополнительно — чтобы логотип не смещал меню на мобильных */
@media (max-width: 768px) {
  .logo-img {
    height: 32px;
  }
}