@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --border-color: #374151;
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  --sidebar-width: 280px;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Sidebar Styling */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
  text-decoration: none;
}

.sidebar-logo span {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar-logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 900;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}

.nav-item a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.nav-item a:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-item.active a {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(59, 130, 246, 0.15));
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--accent-cyan);
}

.sidebar-footer {
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  margin-top: auto;
}

/* Main Content Styling */
.main-content {
  margin-left: var(--sidebar-width);
  flex-grow: 1;
  padding: 3rem 4rem;
  max-width: 1200px;
}

header {
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.025em;
  background: linear-gradient(to right, #ffffff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1.25rem;
  border-left: 4px solid var(--accent-cyan);
  padding-left: 0.75rem;
  color: var(--text-primary);
}

h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--accent-blue);
}

p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

strong {
  color: var(--text-primary);
}

ul, ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

li {
  margin-bottom: 0.5rem;
}

/* Cards & Containers */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(6, 182, 212, 0.4);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Callouts / Alerts */
.callout {
  padding: 1.25rem;
  border-radius: 8px;
  border-left: 4px solid var(--border-color);
  background-color: var(--bg-secondary);
  margin-bottom: 1.5rem;
}

.callout.info {
  border-left-color: var(--accent-cyan);
  background-color: rgba(6, 182, 212, 0.05);
}

.callout.warning {
  border-left-color: var(--accent-amber);
  background-color: rgba(245, 158, 11, 0.05);
}

.callout.danger {
  border-left-color: var(--accent-red);
  background-color: rgba(239, 68, 68, 0.05);
}

.callout.success {
  border-left-color: var(--accent-green);
  background-color: rgba(16, 185, 129, 0.05);
}

.callout-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: 600;
}

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

tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-cyan { background-color: rgba(6, 182, 212, 0.15); color: var(--accent-cyan); }
.badge-green { background-color: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.badge-amber { background-color: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }
.badge-red { background-color: rgba(239, 68, 68, 0.15); color: var(--accent-red); }
.badge-purple { background-color: rgba(139, 92, 246, 0.15); color: var(--accent-purple); }

/* Code & Tech specs */
code {
  font-family: var(--font-mono);
  background-color: var(--bg-tertiary);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
  color: #f472b6;
}

pre {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  color: var(--text-primary);
  font-size: 0.9em;
}

/* Mermaid Wrapper & Interactive Zoom Container */
.mermaid-wrapper {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin: 1.5rem 0;
  display: flex;
  justify-content: center;
  position: relative;
  overflow: hidden;
  min-height: 250px;
}

.mermaid-zoom-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: rgba(31, 41, 55, 0.8);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: background-color 0.2s ease;
}

.mermaid-zoom-btn:hover {
  background-color: var(--accent-cyan);
  color: var(--bg-primary);
}

.mermaid-hint {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  color: var(--text-muted);
  pointer-events: none;
}

/* Zoom Lightbox / Modal overlay */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(5, 7, 12, 0.95);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.lightbox.active {
  display: flex;
}

.lightbox-content {
  width: 90vw;
  height: 80vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: auto;
  cursor: grab;
}

.lightbox-content:active {
  cursor: grabbing;
}

.lightbox-content svg {
  transform-origin: center center;
  transition: transform 0.1s ease-out;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  background: none;
  border: none;
  color: white;
  font-size: 2.5rem;
  cursor: pointer;
}

.lightbox-controls {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1.5rem;
  border-radius: 9999px;
  align-items: center;
}

.lightbox-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.lightbox-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--accent-cyan);
}

.lightbox-zoom-val {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  min-width: 60px;
  text-align: center;
}

/* Footer & Pagination */
.doc-footer {
  margin-top: 4rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 1rem;
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 6px;
  transition: all 0.2s ease;
}

.pagination-btn:hover {
  background-color: rgba(6, 182, 212, 0.1);
  border-color: var(--accent-cyan);
}