:root {
  /* Color Palette - Swiss Medical/Professional */
  --color-primary: #003366; /* Deep Blue - Trust, Professionalism */
  --color-secondary: #008080; /* Teal/Calming Green - Health, Balance */
  --color-accent: #d4af37; /* Muted Gold - Premium touch, subtle */
  --color-text: #333333; /* Dark Gray - Readability */
  --color-text-light: #666666;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa; /* Very light cool gray */
  --color-border: #e0e0e0;

  /* Typography */
  --font-main: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --font-heading: "Playfair Display", Georgia, serif; /* For a touch of classic elegance/stories */

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;

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

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 3rem;
}
h2 {
  font-size: 2.25rem;
}
h3 {
  font-size: 1.5rem;
}

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

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

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

/* Layout Utilities */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

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

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

/* Header & Nav */
header {
  background-color: var(--color-bg);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--spacing-sm) 0;
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  font-size: 1rem;
  color: var(--color-text);
}

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

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

/* Hero Section */
.hero {
  background: linear-gradient(rgba(0, 51, 102, 0.8), rgba(0, 51, 102, 0.6)),
    url("https://images.unsplash.com/photo-1504812729273-db479105c385?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80"); /* Placeholder Nature/Calm image */
  background-size: cover;
  background-position: center;
  color: white;
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.hero h1 {
  color: white;
  margin-bottom: var(--spacing-sm);
}

.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto var(--spacing-md);
  opacity: 0.9;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-secondary);
  color: white;
  border-radius: 4px;
  font-weight: 600;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
  background-color: #006666;
  transform: translateY(-2px);
  color: white;
}

.btn-outline {
  background-color: transparent;
  border: 2px solid white;
}

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

/* Footer */
footer {
  background-color: var(--color-primary);
  color: white;
  padding: var(--spacing-lg) 0;
  margin-top: auto;
}

footer h3 {
  color: white;
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
}

footer p,
footer a {
  color: rgba(255, 255, 255, 0.8);
}

footer a:hover {
  color: white;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: white;
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    text-align: center;
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

  h1 {
    font-size: 2.5rem;
  }

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