:root {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --border-color: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-hover: #0284c7;
  --accent-badge: #0284c7;
  --callout-bg: #0c4a6e;
  --callout-border: #38bdf8;
  --warning-bg: #451a03;
  --warning-border: #f59e0b;
  --nav-bg: rgba(15, 23, 42, 0.9);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --accent: #0284c7;
    --accent-hover: #0369a1;
    --accent-badge: #0284c7;
    --callout-bg: #f0f9ff;
    --callout-border: #0284c7;
    --warning-bg: #fffbeb;
    --warning-border: #d97706;
    --nav-bg: rgba(255, 255, 255, 0.9);
  }
}

* {
  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);
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.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: 920px;
  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: 28px;
  height: 28px;
}

.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;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.main-content {
  flex: 1;
  max-width: 920px;
  width: 100%;
  margin: 32px auto;
  padding: 0 20px;
}

.doc-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 36px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

@media (max-width: 640px) {
  .doc-card {
    padding: 22px 18px;
  }
}

.doc-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 22px;
  margin-bottom: 28px;
}

h1 {
  font-size: 1.95rem;
  line-height: 1.3;
  margin-bottom: 10px;
  color: var(--text-main);
}

.badge {
  display: inline-block;
  background-color: var(--accent-badge);
  color: #ffffff;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.meta-details {
  list-style: none;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.8;
}

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

h2 {
  font-size: 1.35rem;
  margin-top: 32px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
  color: var(--text-main);
}

h3 {
  font-size: 1.1rem;
  margin-top: 22px;
  margin-bottom: 8px;
  color: var(--text-main);
}

p {
  margin-bottom: 14px;
  font-size: 0.98rem;
}

ul, ol {
  margin-bottom: 16px;
  padding-left: 22px;
}

li {
  margin-bottom: 8px;
  font-size: 0.98rem;
}

.callout {
  background-color: var(--callout-bg);
  border-left: 4px solid var(--callout-border);
  padding: 16px 20px;
  border-radius: 6px;
  margin: 20px 0;
}

.callout-warning {
  background-color: var(--warning-bg);
  border-left: 4px solid var(--warning-border);
  padding: 16px 20px;
  border-radius: 6px;
  margin: 20px 0;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background-color: rgba(100, 116, 139, 0.18);
  padding: 2px 5px;
  border-radius: 4px;
}

a {
  color: var(--accent);
  text-decoration: underline;
}

a:hover {
  color: var(--accent-hover);
}

.site-footer {
  border-top: 1px solid var(--border-color);
  margin-top: auto;
  padding: 28px 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: center;
  background-color: var(--card-bg);
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-bottom: 12px;
  flex-wrap: wrap;
  list-style: none;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--accent);
}

/* Home Grid Styles */
.hero {
  text-align: center;
  padding: 30px 10px 40px;
}

.hero-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto;
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.portal-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, border-color 0.15s ease;
  display: flex;
  flex-direction: column;
}

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

.portal-card h3 {
  margin-top: 0;
  color: var(--accent);
  font-size: 1.15rem;
}

.portal-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 0;
  flex-grow: 1;
}