/* ========================================
   Agentic Patterns - Light Minimal Theme
   Inspired by Gemini by Example
   ======================================== */

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

:root {
  --bg: #ffffff;
  --bg-code: #f8f8f8;
  --border: #eee;

  --text: #222;
  --text-secondary: #444;
  --text-muted: #666;

  --accent: #375EAB;
}

html {
  font-size: 14px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========================================
   Header
   ======================================== */
.header {
  padding: 1.5rem 1.5rem 1rem;
  border-bottom: 1px solid var(--border);
}

.header-content {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-left {
  display: flex;
  flex-direction: column;
}

.header h1 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}

.subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.original-site-link {
  color: var(--text-muted);
  text-decoration: none;
  opacity: 0.8;
  transition: opacity 0.15s;
}

.original-site-link:hover {
  opacity: 1;
  color: var(--accent);
}

/* Language Switch */
.lang-switch {
  display: flex;
  gap: 2px;
}

.lang-btn {
  font-size: 0.7rem;
  font-family: inherit;
  font-weight: 500;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
}

.lang-btn:first-child {
  border-radius: 4px 0 0 4px;
}

.lang-btn:last-child {
  border-radius: 0 4px 4px 0;
}

.lang-btn.active {
  background: #52525b;
  color: #fafafa;
  border-color: #52525b;
}

.lang-btn:hover:not(.active) {
  background: var(--bg-code);
}

/* ========================================
   Page Layout
   ======================================== */
.page-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  max-width: 1300px;
  margin: 0 auto;
}

/* ========================================
   Sidebar / TOC
   ======================================== */
.sidebar {
  padding: 1.5rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.toc {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.toc-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.toc-category {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0;
}

.toc-item {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.3rem 0 0.3rem 0.75rem;
  transition: color 0.15s;
}

.toc-item:hover {
  color: var(--accent);
}

.toc-item.active {
  color: var(--accent);
  font-weight: 500;
}

/* ========================================
   Container
   ======================================== */
.container {
  padding: 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  border-left: 1px solid var(--border);
  min-height: calc(100vh - 80px);
}

/* ========================================
   Pattern Section
   ======================================== */
.pattern-card {
  padding-top: 3rem;
}

.pattern-card:first-child {
  padding-top: 0;
}

.pattern-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0;
  margin-bottom: 1rem;
}

.pattern-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}

.tag {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.original-link {
  display: block;
  width: fit-content;
  margin: 0.5rem 1rem 0.5rem auto;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-decoration: none;
  opacity: 0.6;
  transition: opacity 0.15s;
}

.original-link:hover {
  opacity: 1;
  color: var(--accent);
}

/* ========================================
   Pattern Content (2-Column)
   ======================================== */
.pattern-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.visual-side {
  padding: 1rem;
  background: #f3f3f3;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.description-side {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ========================================
   Diagram & Code
   ======================================== */
.diagram-box,
.code-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  overflow: hidden;
}

.box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

.box-label {
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Tab Switch */
.tab-switch {
  display: flex;
  gap: 2px;
}

.tab-switch .tab {
  font-size: 0.55rem;
  font-family: inherit;
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
}

.tab-switch .tab:first-child {
  border-radius: 3px 0 0 3px;
}

.tab-switch .tab:last-child {
  border-radius: 0 3px 3px 0;
}

.tab-switch .tab.active {
  background: #52525b;
  color: #fafafa;
  border-color: #52525b;
}

.tab-switch .tab:hover:not(.active) {
  background: var(--bg-code);
}

/* Tab Content */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tab-content .mermaid {
  padding: 1rem;
  display: flex;
  justify-content: center;
  background: var(--bg);
}

/* ASCII Art Diagram */
.ascii-art {
  margin: 0;
  padding: 1rem;
  background: #2d3748;
  color: #e2e8f0;
  font-family: 'Fira Code', 'JetBrains Mono', 'SF Mono', Consolas, monospace;
  font-size: 0.7rem;
  line-height: 1.4;
  overflow-x: auto;
  white-space: pre;
  border-radius: 0 0 4px 4px;
}

/* Emoji takes 2ch, adjust surrounding spaces in HTML */
.ascii-art .emoji {
  display: inline-block;
  width: 2ch;
  text-align: center;
  vertical-align: top;
}

.code-box .box-header {
  background: var(--bg);
}

.code-box pre {
  margin: 0;
  padding: 12px 14px;
  overflow-x: auto;
  background: #fafafa;
  line-height: 1.5;
}

.code-box code {
  font-family: 'Fira Code', 'JetBrains Mono', monospace;
  font-feature-settings: "liga" 1;
  font-size: 0.8rem;
  line-height: 1.5;
}

/* Match geminibyexample: transparent bg on code inside pre */
pre code.hljs,
pre code {
  background-color: transparent;
  padding: 0;
  margin: 0;
  border: none;
}

/* Bold keywords like geminibyexample */
.hljs-keyword,
.hljs-built_in,
.hljs-type,
.hljs-literal,
.hljs-title.function_ {
  font-weight: 600;
}

/* ========================================
   Description Sections
   ======================================== */
.section {
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border);
}

.section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.section-title {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.3rem;
}

.section p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.section ul {
  list-style: none;
  margin-top: 0.25rem;
}

.section li {
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding-left: 0.75rem;
  position: relative;
  margin-bottom: 0.15rem;
}

.section li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--text-muted);
}

/* Trade-offs */
.tradeoffs {
  display: flex;
  gap: 1.25rem;
  margin-top: 0.25rem;
}

.tradeoff-col {
  flex: 1;
}

.tradeoff-col h4 {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.tradeoff-col.pros h4 { color: #16a34a; }
.tradeoff-col.cons h4 { color: #dc2626; }

.tradeoff-col ul {
  margin: 0;
}

.tradeoff-col li {
  font-size: 0.7rem;
  padding-left: 0.65rem;
}

.tradeoff-col.pros li::before { content: "+"; color: #16a34a; }
.tradeoff-col.cons li::before { content: "−"; color: #dc2626; }

/* ========================================
   Copy Button
   ======================================== */
.copy-btn {
  background: none;
  border: none;
  padding: 0.2rem;
  cursor: pointer;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s;
  opacity: 0.4;
}

.copy-btn:hover {
  color: var(--text);
  opacity: 1;
}

.copy-btn svg {
  width: 12px;
  height: 12px;
}

.copy-btn.copied {
  color: #16a34a;
  opacity: 1;
}

.copy-btn .check-icon {
  display: none;
}

.copy-btn.copied .copy-icon {
  display: none;
}

.copy-btn.copied .check-icon {
  display: inline-block;
}

.pattern-header .header-left {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

.pattern-header .header-left h2 {
  margin: 0;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  padding: 1rem 1.5rem;
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* ========================================
   Mobile Menu (hidden by default on desktop)
   ======================================== */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text);
  flex-shrink: 0;
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
  display: block;
}

.sidebar-overlay {
  display: none;
}

.sidebar-close {
  display: none;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 900px) {
  .pattern-content {
    grid-template-columns: 1fr;
  }

  .visual-side {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 768px) {
  /* Show hamburger */
  .menu-toggle {
    display: block;
  }

  /* Overlay */
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 90;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
  }

  .sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
  }

  /* Layout: single column */
  .page-layout {
    grid-template-columns: 1fr;
  }

  /* Sidebar as slide-in drawer */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    max-width: 80vw;
    height: 100vh;
    background: var(--bg);
    z-index: 100;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    border-right: 1px solid var(--border);
    padding-top: 0;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  /* Close button inside sidebar */
  .sidebar-close {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .sidebar-close-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
  }

  .sidebar-close-btn {
    background: none;
    border: none;
    padding: 0.25rem;
    cursor: pointer;
    color: var(--text-muted);
  }

  .sidebar-close-btn svg {
    width: 20px;
    height: 20px;
    display: block;
  }

  /* Container adjustments */
  .container {
    border-left: none;
    padding: 0.75rem;
    overflow-x: hidden;
  }

  /* Header adjustments - sticky on mobile */
  .header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--bg);
    padding: 0.75rem 1rem;
  }

  .header h1 {
    font-size: 0.85rem;
    font-weight: 600;
  }

  .subtitle {
    display: none;
  }

  /* Pattern card mobile */
  .pattern-card {
    padding-top: 1.5rem;
  }

  .pattern-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .pattern-header h2 {
    font-size: 0.95rem;
  }

  .tag {
    font-size: 0.6rem;
  }

  /* Prevent overflow */
  .pattern-content {
    overflow-x: hidden;
  }

  .visual-side,
  .description-side {
    padding: 0.5rem;
    overflow-x: auto;
  }

  .ascii-art {
    font-size: 0.55rem;
    padding: 0.75rem;
  }

  .code-box pre {
    padding: 0.5rem;
  }

  .code-box code {
    font-size: 0.7rem;
  }

  .diagram-box,
  .code-box {
    max-width: 100%;
  }
}

@media (max-width: 600px) {
  html { font-size: 13px; }
  .tradeoffs { flex-direction: column; gap: 0.5rem; }
}