:root {
  /* Material 3 Light Theme Colors */
  --md-sys-color-primary: #006b5b;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #79f8dd;
  --md-sys-color-on-primary-container: #00201a;
  
  --md-sys-color-secondary: #4a635d;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-secondary-container: #cce8e0;
  --md-sys-color-on-secondary-container: #05201a;
  
  --md-sys-color-surface: #fbfdfa;
  --md-sys-color-on-surface: #191c1b;
  --md-sys-color-surface-variant: #dbe5e1;
  --md-sys-color-on-surface-variant: #3f4946;
  
  --md-sys-color-background: #fbfdfa;
  --md-sys-color-on-background: #191c1b;
  --md-sys-color-outline: #6f7976;
  
  --md-elevation-1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
  --md-elevation-2: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
  
  /* Typography */
  --font-family: 'Roboto', system-ui, -apple-system, sans-serif;
  --border-radius-large: 24px;
  --border-radius-medium: 16px;
  --border-radius-full: 9999px;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Material 3 Dark Theme Colors */
    --md-sys-color-primary: #59dbc2;
    --md-sys-color-on-primary: #00382f;
    --md-sys-color-primary-container: #005044;
    --md-sys-color-on-primary-container: #79f8dd;
    
    --md-sys-color-secondary: #b1ccc4;
    --md-sys-color-on-secondary: #1c352f;
    --md-sys-color-secondary-container: #334b45;
    --md-sys-color-on-secondary-container: #cce8e0;
    
    --md-sys-color-surface: #191c1b;
    --md-sys-color-on-surface: #e0e3e1;
    --md-sys-color-surface-variant: #3f4946;
    --md-sys-color-on-surface-variant: #bfc9c5;
    
    --md-sys-color-background: #191c1b;
    --md-sys-color-on-background: #e0e3e1;
    --md-sys-color-outline: #89938f;
    
    --md-elevation-1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15); /* Keep soft in dark mode, or use surface-container levels */
  }
}

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

body {
  font-family: var(--font-family);
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 400; /* M3 favors normal weight for big headings */
  color: var(--md-sys-color-on-surface);
}

/* App Bar / Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--md-sys-color-surface-variant);
}

.logo {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--md-sys-color-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav a {
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  margin-left: 2rem;
  font-weight: 500;
  font-size: 0.875rem;
  transition: color 0.2s;
}

nav a:hover, nav a.active {
  color: var(--md-sys-color-primary);
}

/* Main Layout */
main {
  padding: 2rem 2rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* Hero Section */
.hero {
  text-align: left;
  padding: 4rem 0;
  max-width: 800px;
}

.hero h1 {
  font-size: 3.5rem;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.125rem;
  color: var(--md-sys-color-on-surface-variant);
  max-width: 600px;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.5rem;
  height: 40px;
  border-radius: var(--border-radius-full);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  font-weight: 500;
  text-decoration: none;
  font-size: 0.875rem;
  transition: background-color 0.2s;
  border: none;
}

.btn-primary:hover {
  background: linear-gradient(rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.08)), var(--md-sys-color-primary);
}

/* Features Grid */
.features-header {
  margin: 4rem 0 2rem;
}

.features-header h2 {
  font-size: 2rem;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background-color: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  padding: 1.5rem;
  border-radius: var(--border-radius-large);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-medium);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
}

.feature-card p {
  font-size: 1rem;
  line-height: 1.5;
}

/* Policy Content Layout */
.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 1.125rem;
}

.policy-card {
  background: var(--md-sys-color-surface);
  /* M3 outlines rather than heavy cards for reading content */
}

.policy-card h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--md-sys-color-primary);
  font-weight: 500;
}

.policy-card p, .policy-card li {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 1rem;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.policy-card ul {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.policy-card li {
  margin-bottom: 0.5rem;
}

.legal-notice {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius-medium);
  margin: 1.5rem 0;
}

.legal-notice p {
  color: inherit;
  margin: 0;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 2rem;
  background-color: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 4rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

footer .logo {
  font-size: 1rem;
  color: var(--md-sys-color-on-surface-variant);
}

footer p {
  font-size: 0.875rem;
  margin: 0;
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
  nav a { margin-left: 1rem; }
  .features { grid-template-columns: 1fr; }
  main { padding: 1.5rem; }
  header { padding: 1rem 1.5rem; }
}