:root {
  --bg-color: #071B3A;
  --card-bg: #0D254C;
  --border-color: #16325C;
  --text-main: #F7F9FC;
  --text-muted: #8E9CAE;
  --accent: #40D7E6;
  --accent-hover: #67E8F9;
  --accent-lime: #C9E84A;
  --callout-bg: #0A2548;
  --callout-border: #40D7E6;
  --warning-bg: #3D2214;
  --warning-border: #D97706;
  --nav-bg: rgba(7, 27, 58, 0.95);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-color: #F7F9FC;
    --card-bg: #FFFFFF;
    --border-color: #E2E8F0;
    --text-main: #071B3A;
    --text-muted: #5C6676;
    --accent: #0E7490;
    --accent-hover: #0891B2;
    --accent-lime: #4D7C0F;
    --callout-bg: #F0FDFA;
    --callout-border: #40D7E6;
    --warning-bg: #FFFBEB;
    --warning-border: #D97706;
    --nav-bg: rgba(247, 249, 252, 0.95);
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  color: var(--text-main);
  background-color: var(--bg-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Accessibility: Skip to Content Link */
.skip-link {
  position: absolute;
  top: -60px;
  left: 20px;
  background-color: var(--accent);
  color: #FFFFFF;
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  z-index: 1000;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 14px;
  outline: 3px solid #FFFFFF;
  outline-offset: 2px;
}

/* Keyboard visible focus indicators */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.site-nav {
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  background-color: var(--nav-bg);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
}

.nav-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.15rem;
}

.brand-logo {
  width: 30px;
  height: 30px;
  border-radius: 6px;
}

.nav-links {
  display: flex;
  gap: 16px;
  list-style: none;
  font-size: 0.92rem;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  transition: color 0.15s ease;
  padding: 4px 6px;
  border-radius: 4px;
}

.nav-links a:hover,
.nav-links a.active,
.nav-links a[aria-current="page"] {
  color: var(--accent);
  font-weight: 700;
}

.main-content {
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 36px 20px 60px;
}

.hero {
  text-align: center;
  margin-bottom: 36px;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
}

.doc-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 28px;
}

.doc-card h2 {
  font-size: 1.45rem;
  margin-bottom: 16px;
  color: var(--text-main);
}

.doc-card h3 {
  font-size: 1.15rem;
  margin: 22px 0 10px;
  color: var(--text-main);
}

.doc-card p {
  margin-bottom: 14px;
}

.doc-card ul,
.doc-card ol {
  margin: 0 0 16px 24px;
}

.doc-card li {
  margin-bottom: 6px;
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.portal-card {
  display: block;
  text-decoration: none;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 20px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.portal-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.portal-card h3 {
  font-size: 1.05rem;
  margin: 0 0 8px;
  color: var(--accent);
}

.portal-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
  line-height: 1.5;
}

.callout {
  background-color: var(--callout-bg);
  border-left: 4px solid var(--callout-border);
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  margin: 18px 0;
  font-size: 0.95rem;
}

.warning {
  background-color: var(--warning-bg);
  border-left: 4px solid var(--warning-border);
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  margin: 18px 0;
  font-size: 0.95rem;
}

.meta-box {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.meta-box strong {
  color: var(--text-main);
}

.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 24px 20px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-muted);
  background-color: var(--card-bg);
}

.site-footer p {
  margin-bottom: 6px;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}