:root {
  --primary-color: #0b1528;
  --primary-dark: #050a14;
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-gold: #ffb703;
  --accent-mars: #e76f51;
  --text-color: #f1f5f9;
  --text-muted: #94a3b8;
  --bg-color: #0a0d18;
  --card-bg: rgba(18, 24, 42, 0.85);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(0, 242, 254, 0.35);
  --radius-sm: 6px;
  --radius-md: 12px;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  background: radial-gradient(circle at 50% 10%, #151e36 0%, #070a12 100%);
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* Header */
.site-header {
  background: rgba(11, 21, 40, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.site-title a {
  color: #ffffff;
  text-decoration: none;
  background: linear-gradient(to right, #ffffff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.site-subtitle {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  display: block;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.site-nav a:hover, .site-nav a.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
}

.site-nav a.active {
  border-bottom: 2px solid var(--accent-cyan);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

/* Main Content */
.page-content {
  flex: 1;
  padding: 2.5rem 24px;
}

/* Footer */
.site-footer {
  background: var(--primary-dark);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.footer-grid h4 {
  color: #ffffff;
  margin-top: 0;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.75rem;
}

/* UI Elements */
h1, h2, h3, h4, h5, h6 {
  color: #ffffff;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-top: 0;
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

p {
  margin-top: 0;
  margin-bottom: 1.25rem;
  color: #cbd5e1;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* Card / Glass Panel */
.card, .glass-panel {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.card h2:first-child {
  margin-top: 0;
}

/* Tables */
.table-responsive {
  overflow-x: auto;
  margin-bottom: 2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th, td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: rgba(255, 255, 255, 0.03);
  color: #ffffff;
  font-weight: 600;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.01);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none !important;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
  color: #050a14 !important;
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Image grid (Featured Docs) */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature-doc-card {
  background: rgba(18, 24, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.feature-doc-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-cyan);
  box-shadow: 0 8px 24px rgba(0, 242, 254, 0.15);
}

.feature-doc-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-bottom: 1px solid var(--border-color);
}

.feature-doc-content {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.feature-doc-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  color: #ffffff;
}

.feature-doc-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 0 1rem 0;
  flex-grow: 1;
}

.feature-doc-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.feature-doc-link:hover {
  color: #ffffff;
}

/* Lists */
ul, ol {
  margin-top: 0;
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: #cbd5e1;
}

li {
  margin-bottom: 0.5rem;
}

code {
  font-family: SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
  color: #f43f5e;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

pre {
  background: #020617;
  padding: 1rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  border: 1px solid var(--border-color);
  font-family: SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.85rem;
}