:root {
  /* Colors */
  --primary: #0f4c81; /* Deep Medical Blue */
  --primary-light: #1b63a3;
  --secondary: #00bfa5; /* Soft Cyan / Teal */
  --secondary-light: #33cbb5;
  --accent: #25d366; /* Light Green / WhatsApp */
  --accent-hover: #128c7e;
  --bg-color: #ffffff;
  --bg-light: #f8fafc;
  --text-dark: #1e293b;
  --text-gray: #475569;
  --border-color: #e2e8f0;

  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-24: 6rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

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

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-family: var(--font-family);
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-color);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--primary);
  line-height: 1.2;
  font-weight: 700;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: var(--spacing-4);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--spacing-6);
  text-align: center;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-3);
}

p {
  color: var(--text-gray);
  margin-bottom: var(--spacing-4);
}

/* Layout Utilities (Mobile First) */
.container {
  width: 100%;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 640px) {
  .container { max-width: 640px; }
}
@media (min-width: 768px) {
  .container { max-width: 768px; padding-left: var(--spacing-8); padding-right: var(--spacing-8); }
}
@media (min-width: 1024px) {
  .container { max-width: 1024px; }
}
@media (min-width: 1280px) {
  .container { max-width: 1280px; }
}

.section {
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-16);
}

/* Grid Utilities */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

/* Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 1rem;
  min-height: 44px; /* Touch target size */
}

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

.btn-primary:hover, .btn-primary:focus-visible {
  background-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover, .btn-secondary:focus-visible {
  background-color: var(--primary);
  color: white;
  transform: translateY(-2px);
}

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

.btn-accent:hover, .btn-accent:focus-visible {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: none; /* Mobile default */
}

.mobile-menu-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary);
  cursor: pointer;
  padding: 0.5rem;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
    gap: var(--spacing-6);
    align-items: center;
  }
  .nav-link {
    font-weight: 500;
    color: var(--text-dark);
  }
  .nav-link:hover {
    color: var(--secondary);
  }
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile Menu overlay */
.mobile-menu {
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  background: white;
  padding: var(--spacing-4);
  box-shadow: var(--shadow-md);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu .nav-link {
  display: block;
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 1.125rem;
}

/* Hero Section */
.hero {
  padding-top: 120px; /* Offset for sticky header */
  padding-bottom: var(--spacing-16);
  background: linear-gradient(135deg, var(--bg-light) 0%, #e0f2f133 100%);
  position: relative;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

@media (min-width: 640px) {
  .hero-cta {
    flex-direction: row;
    justify-content: center;
  }
}

.trust-indicators {
  display: grid;
  gap: var(--spacing-3);
  text-align: left;
  margin-top: var(--spacing-8);
  background: white;
  padding: var(--spacing-6);
  border-radius: 1rem;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 640px) {
  .trust-indicators {
    grid-template-columns: repeat(2, 1fr);
  }
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-weight: 500;
  color: var(--primary);
}

.trust-item svg {
  color: var(--secondary);
  flex-shrink: 0;
}

/* Services Section */
.services-grid {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .services-grid { grid-template-columns: repeat(4, 1fr); }
}

.service-card {
  background: white;
  padding: var(--spacing-6);
  border-radius: 1rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--secondary);
}

.service-icon {
  background: var(--bg-light);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: var(--spacing-4);
  font-size: 1.5rem;
}

/* Why Choose Us */
.why-us {
  background-color: var(--primary);
  color: white;
}

.why-us h2 {
  color: white;
}

.why-us p {
  color: #e2e8f0;
}

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

@media (min-width: 768px) {
  .why-grid { grid-template-columns: repeat(3, 1fr); }
}

.why-card {
  text-align: center;
  padding: var(--spacing-4);
}

.why-icon {
  font-size: 2.5rem;
  color: var(--secondary);
  margin-bottom: var(--spacing-4);
}

/* Patient Experience */
.experience-flow {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
  max-width: 600px;
  margin: 0 auto;
}

.step {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  background: white;
  padding: var(--spacing-4);
  border-radius: 1rem;
  box-shadow: var(--shadow-sm);
}

.step-number {
  background: var(--secondary);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  flex-shrink: 0;
}

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

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

@media (min-width: 768px) {
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
}

.testimonial-card {
  background: white;
  padding: var(--spacing-6);
  border-radius: 1rem;
  box-shadow: var(--shadow-md);
  position: relative;
}

.testimonial-quote {
  font-style: italic;
  font-size: 1.1rem;
  color: var(--text-dark);
  margin-bottom: var(--spacing-4);
}

.testimonial-author {
  font-weight: 600;
  color: var(--primary);
}

/* Contact & CTA Final */
.contact-section {
  padding-bottom: 0;
}

.contact-grid {
  grid-template-columns: 1fr;
  margin-bottom: var(--spacing-16);
}

@media (min-width: 768px) {
  .contact-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-12); }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
}

.contact-icon {
  color: var(--secondary);
  font-size: 1.5rem;
  margin-top: 0.25rem;
}

.map-container {
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  height: 300px;
  background-color: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-gray);
}
@media (min-width: 768px) {
  .map-container { height: 100%; min-height: 400px; }
}

.final-cta {
  background: var(--primary);
  color: white;
  text-align: center;
  padding: var(--spacing-16) var(--spacing-4);
}

.final-cta h2 {
  color: white;
  margin-bottom: var(--spacing-4);
}

.final-cta p {
  color: #e2e8f0;
  max-width: 600px;
  margin: 0 auto var(--spacing-8);
  font-size: 1.125rem;
}

/* Footer */
.footer {
  background: #0a355c;
  color: white;
  padding: var(--spacing-12) 0 var(--spacing-6);
}

.footer-grid {
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-12);
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(4, 1fr); }
}

.footer h3 {
  color: white;
  margin-bottom: var(--spacing-4);
}

.footer ul li {
  margin-bottom: var(--spacing-2);
}

.footer a {
  color: #94a3b8;
}

.footer a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-6);
  border-top: 1px solid #1e4b75;
  color: #94a3b8;
  font-size: 0.875rem;
}

/* Floating WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: var(--accent);
  color: white;
  width: 60px;
  height: 60px;
  border-radius: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  box-shadow: 2px 2px 3px #999;
  z-index: 100;
  transition: var(--transition);
  animation: pulse 2s infinite;
}

.whatsapp-float:hover {
  background-color: var(--accent-hover);
  transform: scale(1.1);
}

/* Animations */
@keyframes pulse {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
  70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Accessibility */
.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;
}

/* Page Header for subpages */
.page-header {
  padding-top: 150px;
  padding-bottom: var(--spacing-12);
  background: var(--primary);
  color: white;
  text-align: center;
}

.page-header h1 {
  color: white;
  margin-bottom: var(--spacing-2);
}

.page-header p {
  color: #e2e8f0;
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Updated Hero Grid */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
  align-items: center;
  text-align: left;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.hero-content-left {
  max-width: 100%;
}

.hero-image-wrapper {
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

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

/* Stats Section */
.stats-section {
  background-color: var(--primary);
  color: white;
  padding: var(--spacing-12) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-6);
  text-align: center;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item h3 {
  color: var(--secondary);
  font-size: 2.5rem;
  margin-bottom: var(--spacing-2);
}

.stat-item p {
  color: #e2e8f0;
  font-weight: 500;
  margin: 0;
}