:root {
  --bg-main: #0a0a0a;
  --bg-sidebar: #121212;
  --bg-card: #171717;
  --border-color: #262626;
  --text-main: #a3a3a3;
  --text-heading: #f5f5f5;
  --accent: #d4af37;
  --accent-light: rgba(212, 175, 55, 0.1);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
}

.layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-brand {
  padding: 24px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-brand .icon {
  color: var(--accent);
  font-size: 1.5rem;
}

.sidebar-nav {
  padding: 20px 0;
  display: flex;
  flex-direction: column;
}

.nav-link {
  padding: 12px 24px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s;
  border-left: 2px solid transparent;
}

.nav-link:hover {
  color: var(--text-heading);
  background-color: #1a1a1a;
}

.nav-link.active {
  color: var(--accent);
  background-color: var(--accent-light);
  border-left: 2px solid var(--accent);
}

/* Main Content */
.main-content {
  margin-left: 280px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-heading);
  font-size: 1.5rem;
  cursor: pointer;
}

.badge {
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-mono);
}

.content-wrapper {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px;
  width: 100%;
}

.section {
  margin-bottom: 60px;
  scroll-margin-top: 80px;
}

h1, h2, h3 {
  color: var(--text-heading);
  font-weight: 500;
  margin-bottom: 16px;
}

h1 { font-size: 2.2rem; letter-spacing: -0.02em; }
h2 { font-size: 1.4rem; border-bottom: 1px solid var(--border-color); padding-bottom: 8px; margin-top: 32px; }

p { margin-bottom: 16px; font-size: 0.95rem; }
p.lead { font-size: 1.1rem; color: #d4d4d4; }

ul {
  margin-left: 20px;
  margin-bottom: 16px;
  font-size: 0.95rem;
}

li { margin-bottom: 8px; }

/* Tables */
.table-container {
  overflow-x: auto;
  margin: 24px 0;
}

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

th, td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: var(--bg-card);
  color: var(--text-heading);
  font-weight: 500;
}

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background-color: #1f1f1f;
  padding: 2px 6px;
  border-radius: 4px;
  color: #e5e5e5;
}

/* Diagram Containers & Styling */
.diagram-container {
  margin: 32px 0 16px 0;
  padding: 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  text-align: center;
  overflow-x: auto;
}

.architecture-diagram {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.diagram-caption {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--text-main);
  font-style: italic;
}

/* Topbar Actions & Live Link */
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.live-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 6px;
  background-color: var(--accent-light);
  border: 1px solid rgba(212, 175, 55, 0.2);
  transition: all 0.2s ease;
}

.live-link:hover {
  background-color: rgba(212, 175, 55, 0.2);
  border-color: var(--accent);
}

/* Overview Banner Link */
.platform-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  margin-bottom: 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.9rem;
}

.platform-banner span {
  color: var(--text-main);
}

.live-button {
  color: #0a0a0a;
  background-color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 6px;
  transition: opacity 0.2s ease;
}

.live-button:hover {
  opacity: 0.9;
}

@media (max-width: 600px) {
  .platform-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

/* Responsive */
@media (max-width: 850px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .menu-toggle { display: block; }
  .content-wrapper { padding: 24px 20px; }
  
  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 90;
    display: none;
    backdrop-filter: blur(2px);
  }
  .sidebar-overlay.active { display: block; }
}