:root {
  --primary-color: #2b43ff;
  --secondary-color: #1e1e56;
  --accent-color: #1658F1;
  --light-bg: #f5f7ff;
  --dark-text: #0b0c49;
  --gray-text: #6c757d;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background-color: #fff;
  color: #333;
  line-height: 1.6;
}

/* Page transition */
.page {
  display: none;
  animation: fadeIn 0.5s ease-in-out;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Navbar styles */
.navbar {
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--secondary-color);
}

.nav-link {
  color: var(--secondary-color);
  font-weight: 500;
  margin: 0 10px;
  position: relative;
  transition: color 0.3s ease;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
  animation: underline 0.3s ease;
}

@keyframes underline {
  from { width: 0; }
  to { width: 100%; }
}

.btn-outline-primary {
  border-radius: 25px;
  font-weight: 500;
  border-color: var(--primary-color);
  color: var(--primary-color);
  transition: all 0.3s ease;
}

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

.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  border-radius: 10px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background-color: #1a35cc;
  border-color: #1a35cc;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(43, 67, 255, 0.3);
}

/* Hero section */
.hero {
  padding: 100px 0;
  background: linear-gradient(135deg, #ffffff 0%, #f8faff 100%);
}

.hero h1 {
  font-weight: 800;
  font-size: 2.75rem;
  color: var(--dark-text);
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero p {
  color: var(--gray-text);
  font-size: 1.1rem;
  max-width: 750px;
}

/* Features section */
.features-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--light-bg) 0%, #f0f4ff 100%);
}

.feature-card {
  background: white;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 5px 25px rgba(43, 67, 255, 0.08);
  height: 100%;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(43, 67, 255, 0.15);
}

.feature-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

/* Courses section */
.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-title {
  color: var(--dark-text);
  font-weight: 700;
  font-size: 2.2rem;
  margin-bottom: 15px;
}

.section-subtitle {
  color: var(--gray-text);
  max-width: 700px;
  margin: 0 auto;
}

.course-card {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  margin-bottom: 30px;
  border: none;
  transition: transform 0.3s ease;
}

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

.course-badge {
  background-color: var(--primary-color);
  color: white;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Stats section */
.stats-section {
  padding: 80px 0;
  background-color: var(--primary-color);
  color: white;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 700;
  margin-bottom: 10px;
}

/* Newsletter */
.newsletter-section {
  padding: 80px 0;
  background-color: var(--primary-color);
  color: white;
}

.newsletter-form .form-control {
  height: 50px;
  border-radius: 25px;
  border: none;
  padding: 0 25px;
}

/* Footer */
footer {
  background-color: #1a1a2e;
  color: white;
  padding: 60px 0 30px;
}

.footer-links h5 {
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-links h5::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 2px;
  background-color: var(--primary-color);
}

.footer-links ul {
  list-style: none;
  padding-left: 0;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #b8b8b8;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.social-icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: white;
  margin-right: 10px;
  transition: all 0.3s ease;
}

.social-icons a:hover {
  background-color: var(--primary-color);
  transform: translateY(-3px);
}

/* Page specific styles */
.page-header {
  padding: 100px 0 60px;
  background: linear-gradient(135deg, #ffffff 0%, #f8faff 100%);
  margin-bottom: 50px;
}

.page-title {
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 15px;
}

.breadcrumb {
  background: none;
  padding: 0;
  justify-content: center;
}

.breadcrumb-item a {
  color: var(--primary-color);
  text-decoration: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
}