/* Base styles */
:root {
  --primary: #0284c7;
  --primary-dark: #0369a1;
  --primary-light: #e0f2fe;
  --text-dark: #1e293b;
  --text-muted: #64748b;
  --background: #ffffff;
  --background-light: #f8fafc;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --radius: 0.5rem;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--background);
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

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

/* Buttons */
.cta-button {
  display: inline-block;
  background-color: var(--primary);
  color: white;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.cta-button:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.secondary-button {
  display: inline-block;
  background-color: white;
  color: var(--primary);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  transition: var(--transition);
  border: 1px solid var(--primary);
}

.secondary-button:hover {
  background-color: var(--primary-light);
  transform: translateY(-2px);
}

.outlined-button {
  display: inline-block;
  background-color: transparent;
  color: var(--primary);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  transition: var(--transition);
  border: 1px solid var(--primary);
}

.outlined-button:hover {
  background-color: var(--primary);
  color: white;
}

/* Header & Navigation */
.nav-header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(5px);
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
  transition: var(--transition);
}

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

/* Section styles */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3rem;
}

.label {
  display: inline-block;
  background-color: var(--primary-light);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.125rem;
}

/* Hero Section */
.hero-section {
  padding: 5rem 0;
  overflow: hidden;
}

.hero-section .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

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

.stat {
  display: flex;
  flex-direction: column;
}

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

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

.hero-image {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background-color: white;
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 3rem;
  height: 3rem;
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

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

/* Steps */
.steps {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 1.5rem;
}

.step-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-light);
  line-height: 1;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

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

/* Tabs and Course Grid */
.tabs {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
  gap: 0.5rem;
}

.tab {
  background: none;
  border: none;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}

.tab:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}

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

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.course-card {
  background-color: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.course-image {
  height: 180px;
  overflow: hidden;
}

.course-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.course-content {
  padding: 1.5rem;
}

.course-tag {
  display: inline-block;
  background-color: var(--primary-light);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
  margin-bottom: 0.75rem;
}

.course-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

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

.stars {
  color: var(--warning);
}

.rating-count {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.course-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.course-price {
  font-weight: 600;
  color: var(--primary);
}

.discount {
  text-decoration: line-through;
  color: var(--text-muted);
  font-weight: 400;
  margin-right: 0.5rem;
}

.center-button {
  text-align: center;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.testimonial-card {
  background-color: white;
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.testimonial-text {
  font-style: italic;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-image {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  object-fit: cover;
}

.author-name {
  font-weight: 600;
  font-size: 1rem;
}

.author-position {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* CTA Section */
.cta-section {
  background-color: var(--primary-light);
}

.cta-section .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.cta-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.cta-description {
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
}

.cta-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.feature {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.feature i {
  color: var(--success);
}

.cta-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

/* Footer */
.footer {
  background-color: var(--background-light);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
}

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

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-heading {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-list a {
  color: var(--text-muted);
  transition: var(--transition);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.copyright {
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background-color: var(--border-light);
  color: var(--text-muted);
  transition: var(--transition);
}

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

/* Responsive Design */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .cta-title {
    font-size: 2rem;
  }
  
  .hero-section .container,
  .cta-section .container {
    grid-template-columns: 1fr;
  }
  
  .hero-image,
  .cta-image {
    grid-row: 1;
  }
  
  .hero-content,
  .cta-content {
    grid-row: 2;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr 1fr;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .step {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 576px) {
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
  }
  
  .tabs {
    flex-direction: column;
    align-items: center;
  }
  
  .tab {
    width: 100%;
  }
}