:root {
  --color-primary-dark: #1a365d;
  --color-primary: #2c5282;
  --color-primary-light: #2b6cb0;
  --color-accent: #c9a227;
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #1a202c;
  --color-text-muted: #4a5568;
  --color-text-subtle: #555555;
  --color-border: #e2e8f0;
  --color-status-success: #276749;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 8px 15px rgba(0, 0, 0, 0.1);
  --radius: 0.625rem;
  --radius-sm: 0.375rem;
  --max-width: 1100px;
  --nav-height: 3.5rem;
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  text-wrap: pretty;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  background: var(--color-primary-dark);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.skip-link:focus {
  top: 1rem;
}

.hero {
  background-image: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: white;
  padding: 5rem 1.25rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  margin-block-end: 0.625rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.hero-logo {
  height: auto;
  max-width: min(100%, 20rem);
  width: 100%;
}

.hero .tagline {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  opacity: 0.95;
  margin-block-end: 1.875rem;
  font-weight: 300;
  line-height: 1.5;
  max-width: 65ch;
  margin-inline: auto;
}

.hero .subtitle {
  max-width: 45rem;
  margin-inline: auto;
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.8;
  opacity: 0.9;
}

.hero a {
  color: white;
  text-underline-offset: 0.2em;
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.5);
}

.hero a:hover,
.hero a:focus-visible {
  text-decoration-color: white;
}

nav {
  background-color: var(--color-surface);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 1.875rem;
  padding: 1rem 1.25rem;
  flex-wrap: wrap;
  max-width: var(--max-width);
  margin-inline: auto;
}

nav a {
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a:focus-visible {
  color: var(--color-primary-light);
  border-bottom-color: var(--color-primary-light);
}

main {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: 2.5rem 1.25rem;
}

section {
  margin-block-end: 3.75rem;
}

h2 {
  color: var(--color-primary-dark);
  font-size: clamp(1.5rem, 4vw, 1.9rem);
  margin-block-end: 1.5625rem;
  text-align: center;
  position: relative;
  padding-block-end: 1rem;
  line-height: 1.3;
}

h2::after {
  content: '';
  display: block;
  width: 3.75rem;
  height: 0.1875rem;
  background-color: var(--color-accent);
  margin: 0.625rem auto 0;
  border-radius: var(--radius-sm);
}

.about-text {
  max-width: 50rem;
  margin-inline: auto;
  text-align: center;
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18.75rem), 1fr));
  gap: 1.5625rem;
  margin-block-start: 1.875rem;
}

.card {
  background: var(--color-surface);
  padding: 1.875rem;
  border-radius: var(--radius);
  border-bottom: 1px solid transparent;
  box-shadow: var(--shadow-md);
  border-block-start: 0.25rem solid var(--color-primary);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card:hover {
  transform: translateY(-0.1875rem);
  box-shadow: var(--shadow-lg);
  border-bottom: 1px solid var(--color-primary-light);
}

.card h3 {
  color: var(--color-primary-dark);
  margin-block: 0;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  line-height: 1.3;
}

.card p {
  color: var(--color-text-subtle);
  font-size: 0.95rem;
  line-height: 1.6;
}

.compliance-banner {
  background: #fff9db;
  border-inline-start: 0.3125rem solid var(--color-accent);
  padding: 1.25rem 1.5625rem;
  border-radius: var(--radius-sm);
  margin-block-end: 1.5625rem;
}

.compliance-banner strong {
  color: #744210;
}

.compliance-banner a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.compliance-banner a:hover,
.compliance-banner a:focus-visible {
  color: var(--color-primary-light);
}

.checklist {
  list-style: none;
  max-width: 50rem;
  margin-inline: auto;
}

.checklist li {
  padding-block: 0.75rem;
  padding-inline-start: 2.5rem;
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

.checklist li:last-child {
  border-bottom: none;
}

.checklist li::before {
  content: '✓';
  position: absolute;
  inset-inline-start: 0.625rem;
  top: 0.75rem;
  color: var(--color-status-success);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1;
}

footer {
  background-color: var(--color-primary-dark);
  color: white;
  text-align: center;
  padding: 2rem 1.25rem;
  margin-block-start: 3.75rem;
}

footer a {
  color: white;
  text-decoration: underline;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

footer a:hover,
footer a:focus-visible {
  text-decoration: none;
}

footer p {
  opacity: 0.8;
  font-size: 0.9rem;
}

footer p + p {
  margin-block-start: 0.5rem;
}

@media (max-width: 37.5rem) {
  .hero {
    padding-block: 3rem;
  }

  nav ul {
    gap: 1rem;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .card {
    transition: none;
  }

  .card:hover {
    transform: none;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-text-subtle: #cbd5e1;
    --color-border: #334155;
  }

  body {
    background-color: var(--color-bg);
    color: var(--color-text);
  }

  nav {
    background-color: var(--color-surface);
  }

  nav a {
    color: #90caf9;
  }

  nav a:hover,
  nav a:focus-visible {
    color: #bbdefb;
    border-bottom-color: #bbdefb;
  }

  .hero {
    background-image: linear-gradient(135deg, #0f172a, #1e3a5f);
  }

  .card {
    background: var(--color-surface);
    border-block-start-color: #90caf9;
  }

  .card h3 {
    color: #7dd3fc;
  }

  .compliance-banner {
    background: #292524;
    border-inline-start-color: #facc15;
  }

  .compliance-banner strong {
    color: #fde68a;
  }

  h2 {
    color: #90caf9;
  }

  h2::after {
    background-color: #facc15;
  }

  footer {
    background-color: #0f172a;
  }
}