/* --- Base Styles --- */
:root {
  --primary-color: #6a28a0;
  --secondary-color: #7747ff;
  --accent-color: #e9e2f9;
  --text-dark: #1a1a1a;
  --text-light: #666;
  --bg-light: #f8f6fc;
  --white: #fff;
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
  --border-radius: 12px;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --container-max-width: 1200px;
}

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

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

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

/* --- Header --- */
.header {
  border-bottom: 1px solid rgba(119, 71, 255, 0.2);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.logo-icon img {
  width: 40px;
  height: 40px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 500;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--secondary-color);
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

.btn.large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

.btn.disabled {
  background: var(--text-light);
  cursor: not-allowed;
}

/* --- Hero --- */
.hero {
  display: flex;
  align-items: center;
  padding: 4rem var(--spacing-sm);
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--white) 100%);
  gap: 4rem;
  min-height: 60vh;
}

.hero-content {
  flex: 1;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: var(--text-light);
}

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

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-icon {
  width: 200px;
  height: 200px;
  color: var(--secondary-color);
}

/* --- Stats --- */
.stats {
  padding: 3rem var(--spacing-sm);
  background: var(--white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-card {
  padding: 2rem;
  border-radius: var(--border-radius);
  background: var(--accent-color);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease-out;
}

.stat-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.stat-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.stat-card h3 {
  font-size: 2.5rem;
  color: var(--secondary-color);
  margin-bottom: 0.5rem;
}

/* --- Courses --- */
.courses {
  padding: 4rem var(--spacing-sm);
  background: var(--bg-light);
}

.courses h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.courses p {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 3rem;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.course-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease-out;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(40px);
}

.course-card.visible {
  opacity: 1;
  transform: translateY(0);
}

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

.course-card.featured::before {
  content: 'Featured';
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--secondary-color);
  color: var(--white);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
}

.course-card.coming-soon {
  opacity: 0.7;
  border: 2px dashed var(--text-light);
}

.course-icon {
  width: 50px;
  height: 50px;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.course-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.course-card p {
  margin-bottom: 0.75rem;
  color: var(--text-light);
}

.target-audience {
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.course-meta {
  display: flex;
  justify-content: space-between;
  margin: 1rem 0;
  font-size: 0.9rem;
  color: var(--text-light);
}

.course-cta {
  display: block;
  width: 100%;
  text-align: center;
  margin-top: 1rem;
}

/* --- Why Choose --- */
.why-choose {
  padding: 4rem var(--spacing-sm);
  background: var(--white);
}

.why-choose h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.why-choose p {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 3rem;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.why-card {
  text-align: center;
  padding: 2rem;
  border-radius: var(--border-radius);
  background: var(--bg-light);
  transition: all 0.3s ease-out;
  opacity: 0;
  transform: translateY(40px);
}

.why-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.why-card:hover {
  transform: translateY(-5px);
}

.why-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.why-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

/* --- Testimonials --- */
.testimonials {
  padding: 4rem var(--spacing-sm);
  background: var(--bg-light);
}

.testimonials h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  font-style: italic;
  transition: all 0.3s ease-out;
  opacity: 0;
  transform: translateY(40px);
}

.testimonial-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.testimonial-card p {
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.author {
  font-weight: 600;
  color: var(--secondary-color);
  text-align: right;
}

/* --- CTA --- */
.cta {
  padding: 4rem var(--spacing-sm);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
  text-align: center;
}

.cta h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.cta p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.cta .btn {
  display: inline-block;
}

/* --- Animations --- */
.lazy-load {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.lazy-load.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding: 2rem var(--spacing-sm);
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .nav-links {
    display: none; /* Or implement mobile menu */
  }

  .courses-grid, .why-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .course-meta {
    flex-direction: column;
    gap: 0.5rem;
  }
}