:root {
  /* Matthews Geographics Brand Palette */
  --brand-blue: #003366;
  /* Academic Blue */
  --brand-orange: #E87722;
  /* Vibrant Orange */
  --brand-cream: #F5F1E8;
  /* Parchment Cream */
  --text-charcoal: #2D3748;
  /* Charcoal Text */
  --text-light: #ffffff;

  /* Mapped Variables */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: var(--brand-cream);
  --color-text-primary: var(--text-charcoal);
  --color-text-secondary: #4a5568;
  --color-accent: var(--brand-orange);
  --color-blue: var(--brand-blue);

  /* Fonts */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Crimson Text', serif;

  --spacing-container: 1200px;
  --spacing-section: 5rem;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text-primary);
  line-height: 1.6;
  font-size: 1.125rem;
  /* Slightly larger for serif readability */
  background-color: var(--color-bg-primary);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

/* Typography */
h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--brand-blue);
  margin-bottom: 1rem;
}

h1 {
  font-size: 3rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
}

h3 {
  font-size: 1.75rem;
}

.text-accent {
  color: var(--color-accent);
}

.text-secondary {
  color: var(--color-text-secondary);
}

/* Layout Utilities */
.container {
  max-width: var(--spacing-container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

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

.grid {
  display: grid;
  gap: 2.5rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Components */
.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  background-color: var(--brand-blue);
  color: white;
  font-family: var(--font-heading);
  /* Buttons use Montserrat */
  font-weight: 600;
  border-radius: 4px;
  /* Slight rounding, mostly square */
  border: 2px solid transparent;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

.btn:hover {
  background-color: #002244;
  /* Darker Blue */
  transform: translateY(-1px);
}

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

.btn-accent:hover {
  background-color: #d16616;
}

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

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

.card {
  background: white;
  padding: 2.5rem;
  border: 1px solid #e2e8f0;
  border-top: 4px solid var(--brand-orange);
  /* Brand Accent */
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Header */
header {
  border-bottom: 1px solid #e2e8f0;
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.98);
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

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

.logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--brand-blue);
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--brand-orange);
  text-transform: uppercase;
  font-size: 1.1em;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--brand-blue);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-links a:hover {
  color: var(--brand-orange);
}

.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--brand-blue);
  cursor: pointer;
}

/* Footer */
footer {
  background-color: var(--brand-blue);
  color: rgba(255, 255, 255, 0.8);
  padding: 4rem 0 2rem;
  font-family: var(--font-heading);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-heading {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.2rem;
  color: var(--brand-orange);
  font-weight: 700;
}

.footer-links a {
  display: block;
  margin-bottom: 0.6rem;
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--font-body);
  font-size: 1rem;
}

.footer-links a:hover {
  color: white;
  text-decoration: underline;
}

.copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Page Specific: Hero */
.hero {
  padding: 6rem 0;
  max-width: 900px;
}

.hero p.hero-sub {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 2.5rem;
  font-weight: 500;
  border-left: 4px solid var(--brand-orange);
  padding-left: 1.5rem;
}

/* Mobile */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  .mobile-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid #e2e8f0;
    gap: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

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

/* Accessibility: Skip Link */
.skip-link {
  position: absolute;
  top: -9999px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-blue);
  color: white;
  padding: 1rem 2rem;
  z-index: 1000;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 600;
  border-radius: 0 0 4px 4px;
}

.skip-link:focus {
  top: 0;
  outline: 4px solid var(--brand-orange);
}

/* Accessibility: Focus Indicators */
*:focus-visible {
  outline: 3px solid var(--brand-orange);
  outline-offset: 2px;
}

/* Accessibility: Button Reset for Toggle */
button.mobile-toggle {
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1.5rem;
  padding: 0.5rem;
  /* Touch target */
}