:root {
  --primary: #1e3a8a;
  --primary-light: #3b82f6;
  --primary-lighter: #60a5fa;
  --neutral-50: #f9fafb;
  --neutral-100: #f3f4f6;
  --neutral-200: #e5e7eb;
  --neutral-400: #9ca3af;
  --neutral-600: #4b5563;
  --neutral-800: #1f2937;
  --neutral-900: #111827;
  --success: #10b981;
  --danger: #ef4444;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  color: var(--neutral-800);
  line-height: 1.6;
  background-color: var(--neutral-50);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  color: white;
  font-weight: 600;
}

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

.navbar {
  border-bottom: 1px solid var(--neutral-200);
}

.navbar-light .navbar-nav .nav-link {
  color: var(--neutral-800);
  font-weight: 500;
  transition: color 0.3s ease;
}

.navbar-light .navbar-nav .nav-link:hover,
.navbar-light .navbar-nav .nav-link.active {
  color: var(--primary);
}

.hero-section {
  background: linear-gradient(135deg, var(--neutral-50) 0%, var(--neutral-100) 100%);
  padding: 100px 0;
  min-height: 600px;
  display: flex;
  align-items: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--neutral-600);
  margin-bottom: 30px;
  line-height: 1.8;
}

.hero-image {
  max-height: 500px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(30, 58, 138, 0.15);
}

.bmi-calculator-section {
  padding: 80px 0;
  background-color: white;
}

.bmi-card {
  border: none;
  box-shadow: 0 4px 20px rgba(30, 58, 138, 0.08);
  border-radius: 12px;
}

.bmi-card .form-control {
  border: 2px solid var(--neutral-200);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.bmi-card .form-control:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.25);
}

.services-preview {
  padding: 80px 0;
  background-color: var(--neutral-50);
}

.service-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(30, 58, 138, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 25px rgba(30, 58, 138, 0.15);
}

.service-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.service-card h4 {
  color: var(--primary);
  font-weight: 700;
  margin: 20px 20px 10px;
}

.service-card p {
  color: var(--neutral-600);
  padding: 0 20px 20px;
  font-size: 0.95rem;
}

.testimonials-section {
  padding: 80px 0;
  background-color: white;
}

.testimonial-card {
  background: linear-gradient(135deg, var(--neutral-50) 0%, var(--neutral-100) 100%);
  padding: 30px;
  border-radius: 12px;
  border-left: 4px solid var(--primary);
}

.testimonial-stars {
  color: #fbbf24;
  font-size: 1.2rem;
  margin-bottom: 15px;
}

.testimonial-card p {
  color: var(--neutral-700);
  font-style: italic;
  margin-bottom: 15px;
}

.testimonial-card strong {
  color: var(--primary);
  display: block;
  font-size: 0.95rem;
}

.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  padding: 80px 0;
  text-align: center;
}

.cta-section h2 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  font-weight: 700;
}

.cta-section p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.page-header {
  padding: 60px 0;
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.page-header .lead {
  font-size: 1.2rem;
  opacity: 0.9;
}

.about-content {
  background-color: white;
}

.about-content h2 {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 20px;
  font-size: 2rem;
}

.about-content p {
  color: var(--neutral-700);
  line-height: 1.8;
  font-size: 1.05rem;
  margin-bottom: 15px;
}

.about-content ul li {
  color: var(--neutral-700);
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.certification-box {
  background: white;
  padding: 40px 30px;
  border-radius: 12px;
  border: 2px solid var(--neutral-200);
  transition: all 0.3s ease;
}

.certification-box:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 20px rgba(30, 58, 138, 0.1);
}

.certification-box h5 {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 15px;
  font-size: 1.2rem;
}

.certification-box p {
  color: var(--neutral-600);
  margin: 0;
}

.services-content {
  background-color: white;
}

.services-content h2 {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 20px;
  font-size: 2rem;
}

.services-content p {
  color: var(--neutral-700);
  line-height: 1.8;
  font-size: 1.05rem;
}

.services-content ul li {
  color: var(--neutral-700);
  margin-bottom: 12px;
  font-size: 1.05rem;
}

.contact-content {
  background-color: white;
}

.contact-info {
  background: var(--neutral-50);
  padding: 25px;
  border-radius: 10px;
  border-left: 4px solid var(--primary);
}

.contact-info h5 {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 10px;
}

.contact-info p {
  color: var(--neutral-700);
  margin: 0;
  font-size: 0.95rem;
}

.contact-info a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.thank-you-content {
  padding: 40px;
}

.policy-content {
  background-color: white;
  min-height: 70vh;
}

.policy-content h1 {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 10px;
  font-size: 2.5rem;
}

.policy-content h3 {
  color: var(--primary);
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 20px;
  font-size: 1.3rem;
}

.policy-content p,
.policy-content li {
  color: var(--neutral-700);
  line-height: 1.8;
  font-size: 1rem;
  margin-bottom: 15px;
}

.policy-content ul {
  margin-left: 20px;
  margin-bottom: 20px;
}

footer {
  background-color: var(--neutral-900);
  color: white;
  margin-top: 80px;
}

footer h5 {
  color: white;
  font-weight: 700;
  margin-bottom: 15px;
}

footer p {
  color: #d1d5db;
  font-size: 0.95rem;
}

.footer-link {
  color: #d1d5db;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-link:hover {
  color: white;
}

footer a {
  color: #d1d5db;
  transition: color 0.3s ease;
}

footer a:hover {
  color: white;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-section {
    padding: 60px 0;
    min-height: auto;
  }

  .page-header h1 {
    font-size: 1.8rem;
  }

  .cta-section h2 {
    font-size: 1.8rem;
  }

  .services-preview,
  .testimonials-section,
  .about-content,
  .services-content,
  .contact-content {
    padding: 40px 0;
  }

  .service-card {
    margin-bottom: 20px;
  }

  .about-content h2,
  .services-content h2 {
    font-size: 1.5rem;
  }

  .certification-box,
  .contact-info {
    margin-bottom: 20px;
  }
}