:root {
  --bg-main: #0f172a;
  --bg-sidebar: #1e293b;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --border-color: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-primary: #38bdf8;
  --accent-success: #22c55e;
  --accent-warning: #eab308;
  --accent-danger: #ef4444;
  --accent-purple: #a855f7;
  --sidebar-width: 280px;
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
}

body {
  display: flex;
  min-height: 100vh;
  line-height: 1.6;
}

/* --- SIDEBAR --- */
aside {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-header .logo-icon {
  font-size: 1.8rem;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar-header .title {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: #fff;
}

.sidebar-header .badge {
  font-size: 0.65rem;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.nav-group {
  padding: 20px 12px;
}

.nav-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 12px 8px 12px;
}

.nav-list {
  list-style: none;
}

.nav-list li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.nav-list li a:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: #fff;
}

.nav-list li a.active {
  background-color: rgba(56, 189, 248, 0.15);
  color: var(--accent-primary);
  font-weight: 600;
}

/* --- MAIN CONTENT --- */
main {
  margin-left: var(--sidebar-width);
  flex: 1;
  max-width: 1050px;
  padding: 40px 60px;
}

.doc-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.doc-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #ffffff 30%, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.doc-header p {
  font-size: 1.1rem;
  color: var(--text-muted);
}

section {
  margin-bottom: 48px;
  scroll-margin-top: 30px;
}

h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding-bottom: 8px;
}

h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: #38bdf8;
  margin: 24px 0 12px 0;
}

p {
  color: #cbd5e1;
  margin-bottom: 16px;
  font-size: 0.98rem;
}

/* --- CARDS & CALLOUTS --- */
.callout {
  padding: 16px 20px;
  border-radius: 10px;
  margin: 20px 0;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  border: 1px solid transparent;
  font-size: 0.93rem;
}

.callout-info {
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.25);
  color: #e0f2fe;
}

.callout-warning {
  background: rgba(234, 179, 8, 0.08);
  border-color: rgba(234, 179, 8, 0.25);
  color: #fef08a;
}

.callout-icon {
  font-size: 1.25rem;
  line-height: 1;
}

/* --- STATS GRID --- */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.stat-icon {
  font-size: 2rem;
  background: rgba(255, 255, 255, 0.05);
  width: 52px;
  height: 52px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-info h4 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 2px;
}

.stat-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
}

/* --- TABLES --- */
.table-container {
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--border-color);
  border-radius: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

th {
  background-color: rgba(255, 255, 255, 0.03);
  color: #f1f5f9;
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: #cbd5e1;
}

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

/* --- CODE & INLINE BADGES --- */
code {
  font-family: 'JetBrains Mono', monospace;
  background: rgba(255, 255, 255, 0.08);
  color: #38bdf8;
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

pre {
  font-family: 'JetBrains Mono', monospace;
  background: #020617;
  border: 1px solid var(--border-color);
  padding: 16px;
  border-radius: 10px;
  overflow-x: auto;
  color: #e2e8f0;
  font-size: 0.88rem;
  margin: 16px 0;
}

ul, ol {
  margin-left: 20px;
  color: #cbd5e1;
  margin-bottom: 16px;
}

li {
  margin-bottom: 8px;
}

/* Footer */
footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

@media (max-width: 850px) {
  aside {
    display: none;
  }
  main {
    margin-left: 0;
    padding: 24px;
  }
}