:root {
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-border: #e8e8e8;
  --color-text: #111827;
  --color-text-secondary: #4b5563;
  --color-text-tertiary: #6b7280;
  --color-primary: #1472b6;
  --color-primary-light: #1882d0;
  --color-primary-bg: #edf4fb;
  --color-accent: #1472b6;
  --color-card-bg: #fafafa;
  --color-card-border: #e8e8e8;
  --color-cta-bg: #1472b6;
  --color-cta-text: #ffffff;
  --color-cta-hover: #1882d0;
  --color-step-bg: #edf4fb;
  --color-step-text: #1472b6;
  --font-sans: "Inter", "Open Sans", system-ui, -apple-system, sans-serif;
  --font-serif: "Georgia", "Times New Roman", serif;
  --max-width: 72rem;
  --content-width: 48rem;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
}

.dark {
  --color-bg: #111827;
  --color-surface: #1f2937;
  --color-border: #374151;
  --color-text: #f3f4f6;
  --color-text-secondary: #d1d5db;
  --color-text-tertiary: #9ca3af;
  --color-primary: #5ba8e6;
  --color-primary-light: #7bbcee;
  --color-primary-bg: #1a2a40;
  --color-accent: #5ba8e6;
  --color-card-bg: #1f2937;
  --color-card-border: #374151;
  --color-cta-bg: #5ba8e6;
  --color-cta-text: #111827;
  --color-cta-hover: #7bbcee;
  --color-step-bg: #1a2a40;
  --color-step-text: #5ba8e6;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* ─── Header ─── */

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 9999;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  white-space: nowrap;
}

.logo-link:hover {
  text-decoration: none;
}

.logo-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.main-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
}

.main-nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.main-nav .portal-link {
  color: var(--color-primary);
  font-weight: 600;
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  flex-direction: column;
  gap: 5px;
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: background-color 0.2s ease;
}

/* ─── Theme Toggle ─── */

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.375rem;
  padding: 2px;
  flex-shrink: 0;
}

.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: 0.25rem;
  cursor: pointer;
  color: var(--color-text-tertiary);
  transition: background-color 0.15s ease, color 0.15s ease;
}

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

.theme-btn.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.dark .theme-btn.active {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.theme-btn svg {
  width: 15px;
  height: 15px;
}

/* ─── Main content ─── */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-xl);
}

/* ─── Page sections ─── */

.page-hero {
  max-width: var(--content-width);
  margin: 0 auto var(--space-4xl);
  text-align: center;
}

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.page-hero .subtitle {
  font-size: 1.1875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 36rem;
  margin: 0 auto var(--space-xl);
}

.page-hero .cta-link {
  display: inline-block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-cta-text);
  background: var(--color-cta-bg);
  padding: 0.75rem 1.75rem;
  border-radius: 0.375rem;
  transition: background 0.15s ease;
}

.page-hero .cta-link:hover {
  background: var(--color-cta-hover);
  text-decoration: none;
}

.content-section {
  max-width: var(--content-width);
  margin: 0 auto var(--space-3xl);
}

.content-section h2 {
  font-family: var(--font-serif);
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.content-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  line-height: 1.4;
}

.content-section p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.7;
}

.content-section ul {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-lg);
}

.content-section ul li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

.content-section ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.content-section ol {
  padding-left: 1.25rem;
  margin-bottom: var(--space-lg);
}

.content-section ol li {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

/* ─── Card grid (for industry/program listings) ─── */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.card-link {
  display: block;
  padding: var(--space-lg);
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: 0.375rem;
  transition: border-color 0.15s ease, background-color 0.2s ease;
}

.card-link:hover {
  border-color: var(--color-accent);
  text-decoration: none;
}

.card-link h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.card-link p {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

/* ─── Steps ─── */

.steps-list {
  counter-reset: steps;
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-2xl);
}

.steps-list li {
  counter-increment: steps;
  position: relative;
  padding-left: 3rem;
  margin-bottom: var(--space-lg);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.steps-list li::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--color-step-bg);
  color: var(--color-step-text);
  font-weight: 700;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.steps-list li strong {
  color: var(--color-text);
}

/* ─── Divider ─── */

.section-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  max-width: var(--content-width);
  margin: var(--space-3xl) auto;
}

/* ─── Footer ─── */

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  margin-top: var(--space-4xl);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-xl) var(--space-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

.footer-brand {
  grid-column: 1 / -1;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: var(--space-xs);
}

.footer-logo .logo-mark {
  width: 24px;
  height: 24px;
}

.footer-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary);
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

.footer-nav {
  grid-column: 1 / -1;
  display: flex;
  gap: var(--space-3xl);
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-md);
}

.footer-col a {
  display: block;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-legal {
  grid-column: 1 / -1;
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
}

.footer-legal p {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  line-height: 1.5;
  margin-bottom: var(--space-sm);
}

.footer-legal-secondary {
  font-size: 0.75rem;
  opacity: 0.8;
}

/* ─── Breadcrumbs ─── */

.breadcrumbs {
  max-width: var(--content-width);
  margin: 0 auto var(--space-xl);
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  line-height: 1.4;
}

.breadcrumbs a {
  color: var(--color-text-tertiary);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs .separator {
  margin: 0 0.375rem;
  color: var(--color-border);
}

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

/* ─── Image container (reserved visual slot) ─── */

.image-container {
  max-width: var(--content-width);
  margin: 0 auto var(--space-2xl);
  aspect-ratio: 16 / 7;
  background: var(--color-primary-bg);
  border-radius: 0.375rem;
  overflow: hidden;
}

.image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ─── Related pages ─── */

.related-pages {
  max-width: var(--content-width);
  margin: 0 auto;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.related-pages h3 {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-md);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
}

.related-links a {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.related-links a:hover {
  color: var(--color-primary);
}

/* ─── Back link ─── */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-xl);
}

.back-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* ─── Responsive ─── */

@media (max-width: 768px) {
  .header-inner {
    padding: var(--space-md);
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .header-right {
    gap: var(--space-sm);
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-sm);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    padding: var(--space-sm) 0;
  }

  main {
    padding: var(--space-2xl) var(--space-md);
  }

  .page-hero h1 {
    font-size: 1.875rem;
  }

  .page-hero .subtitle {
    font-size: 1.0625rem;
  }

  .content-section h2 {
    font-size: 1.375rem;
  }

  .footer-inner {
    padding: var(--space-2xl) var(--space-md) var(--space-md);
  }

  .footer-nav {
    flex-direction: column;
    gap: var(--space-xl);
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}