@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Lora:ital,wght@0,500;0,600;0,700;1,500&family=Noto+Sans+SC:wght@400;500&family=Noto+Serif+SC:wght@500;700;900&family=Fira+Code:wght@400;500&display=swap');

:root {
  /* Colors - Modern Academic Light Theme */
  --bg-color: #fafaf9; /* Pearl white/off-white */
  --bg-surface: #ffffff;
  --bg-sidebar: #f4f5f4;
  --bg-code: #f3f4f6;
  
  --text-main: #334155; /* Soft charcoal for readability */
  --text-heading: #1e293b;
  --text-muted: #64748b;
  
  /* Accents */
  --accent-primary: #3b82f6; /* Modern Blue */
  --accent-hover: #2563eb;
  --accent-secondary: #0f766e; /* Academic Teal */
  
  --border-color: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.15);
  
  /* Shadows - Soft, modern diffusion */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.03);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.04), 0 2px 4px rgba(0,0,0,0.02);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.05), 0 4px 12px rgba(0,0,0,0.02);
  
  /* Typography */
  --font-serif: 'Lora', 'Noto Serif SC', serif;
  --font-sans: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', ui-monospace, SFMono-Regular, monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ----------------- Layout ----------------- */

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

.sidebar {
  width: 280px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 32px 24px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
}

.sidebar-brand {
  display: block;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-heading);
  text-decoration: none;
  margin-bottom: 40px;
  letter-spacing: -0.01em;
}

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

.nav-item {
  margin-bottom: 8px;
}

.nav-link {
  display: block;
  padding: 8px 12px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 500;
  font-size: 14.5px;
  transition: all 0.2s ease;
}

.nav-link:hover {
  background-color: rgba(15, 23, 42, 0.04);
  color: var(--text-heading);
}

.nav-link.active {
  background-color: white;
  color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

.nav-divider {
  margin: 16px 12px;
  border: none;
  border-top: 1px solid var(--border-color);
  opacity: 0.6;
}

.nav-external {
  list-style: none;
  padding-top: 8px;
}

.nav-github {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

.nav-github svg {
  opacity: 0.7;
}

.nav-github:hover svg {
  opacity: 1;
}

.main-content {
  flex-grow: 1;
  padding: 64px 48px;
  display: flex;
  justify-content: center;
}

.content-wrapper {
  max-width: 800px;
  width: 100%;
}

/* ----------------- Markdown Content Styles ----------------- */

.markdown-body {
  font-family: var(--font-sans);
  color: var(--text-main);
}

.markdown-body h1 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-heading);
  margin-bottom: 1.5rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.markdown-body h2 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-top: 3.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  line-height: 1.3;
}

.markdown-body h3 {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.markdown-body p {
  margin-bottom: 1.5rem;
}

.markdown-body strong {
  color: var(--text-heading);
  font-weight: 600;
}

.markdown-body ul, .markdown-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.75rem;
}

.markdown-body li {
  margin-bottom: 0.5rem;
}

/* Beautiful Blockquotes */
.markdown-body blockquote {
  margin: 2rem 0;
  padding: 1.25rem 1.75rem;
  background-color: var(--bg-sidebar);
  border-left: 4px solid var(--accent-primary);
  border-radius: 0 8px 8px 0;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--text-heading);
  font-style: italic;
}

.markdown-body blockquote > p:last-child {
  margin-bottom: 0;
}

/* Tables (Academic Style) */
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9rem;
  background: var(--bg-surface);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.markdown-body th {
  background-color: var(--bg-sidebar);
  color: var(--text-heading);
  font-weight: 600;
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-strong);
}

.markdown-body td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}

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

/* Code Blocks */
.markdown-body pre {
  background-color: var(--bg-code);
  padding: 1.5rem;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  line-height: 1.6;
}

.markdown-body code {
  font-family: var(--font-mono);
}

.markdown-body p code, 
.markdown-body li code,
.markdown-body td code {
  background-color: var(--bg-code);
  color: #c2410c; /* Subdued vibrant orange for inline code */
  padding: 0.2em 0.4em;
  border-radius: 6px;
  font-size: 0.85em;
  border: 1px solid rgba(0,0,0,0.04);
}

/* Mermaid Wrapper */
.mermaid {
  display: flex;
  justify-content: center;
  background-color: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  margin: 2.5rem 0;
  border: 1px solid var(--border-color);
  overflow-x: auto;
}

/* Cards & Callouts - Friendly modern */
.insight-card {
  background-color: #f0fdf4; /* very light green */
  border: 1px solid #bbf7d0;
  padding: 1.5rem;
  border-radius: 12px;
  margin: 2rem 0;
  color: #166534;
}

.insight-card strong {
  color: #14532d;
}

/* Responsive */
@media (max-width: 1024px) {
  .docs-container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    padding: 24px;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .main-content {
    padding: 32px 24px;
  }
}