:root {
  /* Colors */
  --primary-color: #0A4A6B; /* Medical Blue */
  --primary-light: #166A96;
  --primary-dark: #05334D;
  --accent-color: #2D8C5B; /* Subtle Green */
  --accent-hover: #227048;
  --bg-color: #F8F9FA; /* Soft Gray */
  --bg-white: #FFFFFF;
  --text-main: #2C3E50;
  --text-light: #5A6A7A;
  --border-color: #E2E8F0;
  
  /* Typography */
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base: 16px;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  
  /* Layout */
  --container-width: 1200px;
  --header-height: 80px;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary-dark);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: var(--spacing-sm); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: var(--spacing-xs); }
p { margin-bottom: var(--spacing-sm); color: var(--text-light); }

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.section {
  padding: var(--spacing-lg) 0;
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  font-family: inherit;
  font-size: 1rem;
}

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

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

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

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

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

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

.btn-full {
  width: 100%;
}

/* Header & Navigation */
.header {
  background-color: var(--bg-white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

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

.nav-menu {
  display: none; /* Mobile first: hidden */
}

.nav-link {
  font-weight: 500;
  padding: 0.5rem 1rem;
  color: var(--text-main);
}

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

.mobile-toggle {
  display: block;
  font-size: 1.5rem;
  background: none;
  border: none;
  color: var(--primary-color);
  cursor: pointer;
}

/* Hero Section */
.hero {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  background-color: var(--bg-white);
  position: relative;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  padding: var(--spacing-lg) 0;
}

.hero-subtitle {
  color: var(--accent-color);
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: var(--spacing-xs);
  display: block;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: var(--spacing-md);
}

.hero-image {
  display: none; /* Mobile first: hide large images if taking too much space */
}

/* Features / Cards */
.grid {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: 1fr;
}

.card {
  background: var(--bg-white);
  border-radius: 8px;
  padding: var(--spacing-md);
  box-shadow: 0 4px 6px rgba(0,0,0,0.02);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.card-icon {
  width: 48px;
  height: 48px;
  background-color: var(--bg-color);
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-sm);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Footer */
.footer {
  background-color: var(--primary-dark);
  color: var(--bg-white);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-title {
  color: var(--bg-white);
  margin-bottom: var(--spacing-sm);
}

.footer-text {
  color: #A0AAB2;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: #A0AAB2;
}

.footer-links a:hover {
  color: var(--bg-white);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255,255,255,0.1);
  color: #A0AAB2;
}

/* Floating WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 60px;
  height: 60px;
  background-color: #25D366; /* Official WA color */
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  box-shadow: 0 4px 10px rgba(37, 211, 102, 0.3);
  z-index: 1000;
  transition: transform var(--transition-fast);
}

.whatsapp-float:hover {
  transform: scale(1.1);
  color: white;
}

/* Animation utilities */
.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);
}

/* Media Queries (Desktop First... wait, required Mobile First) */
/* The above is already mobile first */

@media (min-width: 768px) {
  /* Tablet & Desktop Layouts */
  .mobile-toggle {
    display: none;
  }
  
  .nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
  }
  
  .hero-actions {
    flex-direction: row;
  }
  
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  /* Large Desktop Layouts */
  .hero-content {
    width: 50%;
  }
  
  .hero-image {
    display: block;
    position: absolute;
    right: 0;
    top: 0;
    width: 50%;
    height: 100%;
    object-fit: cover;
  }
  
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Mobile Menu Active State */
.nav-menu.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--bg-white);
  padding: var(--spacing-md);
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
  gap: var(--spacing-sm);
}

.nav-menu.active .nav-link {
  display: block;
  width: 100%;
}

/* Testimonial Carousel Styles */
.testimonial-carousel-container {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.testimonial-track {
  display: flex;
  transition: transform 0.5s ease-in-out;
  width: 100%;
}

.testimonial-slide {
  min-width: 100%;
  box-sizing: border-box;
  padding: 0 1rem;
}

.testimonial-content {
  font-size: 1.25rem;
  font-style: italic;
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

.testimonial-author {
  font-weight: 600;
  color: #E2E8F0;
}

.testimonial-indicators {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: var(--spacing-md);
}

.indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.3);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.indicator:hover {
  transform: scale(1.2);
}

.indicator.active {
  background-color: var(--bg-white);
}