/* ===========================
   Professional Documentation Theme
   FastAPI SSE Events
   =========================== */

/* ---------------------------
   Design Tokens & Variables
   --------------------------- */
:root {
  /* Color Palette - Professional Dark */
  --bg-body: #0d1117;       /* Github Dimmed */
  --bg-nav: #161b22;        /* Github Header */
  --bg-sidebar: #0d1117;    
  --bg-card: #161b22;
  --bg-card-hover: #1c2128;
  --bg-code: #1e242e;       
  --bg-inline-code: rgba(110, 118, 129, 0.4);

  /* Borders */
  --border-color: #30363d;
  --border-hover: #8b949e;
  --border-active: #58a6ff;

  /* Text Colors */
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --text-tertiary: #6e7681;
  --text-link: #58a6ff;
  --text-link-hover: #79c0ff;
  --text-code: #c9d1d9;

  /* Accents */
  --accent-primary: #1f6feb;   
  --accent-primary-hover: #388bfd;
  --accent-success: #238636;
  --accent-warning: #9e6a03;   
  --accent-error: #da3633;
  --accent-info: #1f6feb;

  /* Spacing System */
  --space-2: 0.125rem;
  --space-4: 0.25rem;
  --space-8: 0.5rem;
  --space-12: 0.75rem;
  --space-16: 1rem;
  --space-24: 1.5rem;
  --space-32: 2rem;
  --space-48: 3rem;
  --space-64: 4rem;

  /* Layout */
  --header-height: 60px;
  --sidebar-width: 280px;
  --toc-width: 240px;
  --content-max-width: 860px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-body: #ffffff;
  --bg-nav: #f6f8fa;
  --bg-sidebar: #ffffff;
  --bg-card: #f6f8fa;
  --bg-card-hover: #f3f4f6; 
  --bg-code: #f6f8fa;
  --bg-inline-code: rgba(175, 184, 193, 0.2);

  --border-color: #d0d7de;
  --border-hover: #8c959f;
  
  --text-primary: #1f2328;
  --text-secondary: #656d76;
  --text-tertiary: #8c959f;
  --text-code: #1f2328;

  --accent-primary: #0969da;
  --accent-primary-hover: #0550ae;
}

/* ---------------------------
   Reset & Base Styles
   --------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 2rem);
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-body);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color 0.1s ease;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 0.2em 0.4em;
  border-radius: var(--radius-md);
  background-color: var(--bg-inline-code);
  color: var(--text-primary);
}

/* ---------------------------
   Layout Structure
   --------------------------- */
.layout-wrapper {
  display: flex;
  flex: 1;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background-color: var(--bg-nav);
  border-bottom: 1px solid var(--border-color);
  width: 100%;
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-24);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-16);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary) !important;
  text-decoration: none !important;
}

.logo i { color: var(--accent-primary); }

.header-nav {
  display: flex;
  gap: var(--space-24);
}

.header-nav a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.header-nav a:hover { color: var(--text-primary); }

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-16);
}

/* Sidebar Navigation */
.sidebar {
  width: var(--sidebar-width);
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  border-right: 1px solid var(--border-color);
  background-color: var(--bg-sidebar);
  flex-shrink: 0;
  padding: var(--space-24) 0;
}

.sidebar-content { padding: 0 var(--space-24); }

.sidebar-search {
  margin-bottom: var(--space-24);
  position: relative;
}

.sidebar-search input {
  width: 100%;
  padding: var(--space-8) var(--space-12) var(--space-8) var(--space-32);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: border-color 0.15s ease;
}

.sidebar-search i {
  position: absolute;
  left: var(--space-12);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.sidebar-search input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.3);
}

.nav-section { margin-bottom: var(--space-24); }

.nav-section h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: var(--space-12);
  font-weight: 600;
}

.sidebar-nav ul { list-style: none; }
.sidebar-nav li { margin-bottom: 2px; }

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding: 6px 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all 0.1s;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
  text-decoration: none;
}

.sidebar-nav a.active {
  color: var(--accent-primary);
  font-weight: 500;
}

/* Main Content */
.main {
  flex: 1;
  min-width: 0;
  padding: var(--space-48) var(--space-48);
}

.content-container {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

/* Hero Section */
.hero {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--space-48);
  margin-bottom: var(--space-48);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  padding: 4px 12px;
  background-color: rgba(31, 111, 235, 0.15);
  border: 1px solid rgba(31, 111, 235, 0.3);
  border-radius: 20px;
  color: var(--accent-primary);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: var(--space-24);
}

.hero-title {
  font-size: 3rem;
  line-height: 1.1;
  margin-bottom: var(--space-16);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: var(--space-32);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: var(--space-16);
  margin-bottom: var(--space-48);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  transition: all 0.2s;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: white !important;
  border: 1px solid transparent;
}

.btn-primary:hover { background-color: var(--accent-primary-hover); }

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary) !important;
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--text-secondary);
}

/* Features Grid (Hero) */
.hero-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-16);
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.hero-feature i { color: var(--accent-success); }

/* Documentation Content */
.section {
  margin-bottom: var(--space-64);
  scroll-margin-top: 80px;
}

.section-title {
  font-size: 2rem;
  padding-bottom: var(--space-16);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-24);
  margin-top: var(--space-48);
  display: flex;
  align-items: center;
  gap: var(--space-12);
  color: var(--text-primary);
}

.section-title i {
  color: var(--text-secondary);
  font-size: 0.8em;
}

.subsection-title {
  font-size: 1.5rem;
  margin-top: var(--space-32);
  margin-bottom: var(--space-16);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.subsection-title i {
  font-size: 0.8em;
  color: var(--accent-primary);
}

p { margin-bottom: var(--space-16); color: var(--text-secondary); }

/* Code Blocks */
.code-block {
  margin: var(--space-24) 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--bg-nav);
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.copy-btn {
  background: none;
  border: none;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.copy-btn:hover {
  background-color: var(--border-color);
  color: var(--text-primary);
}

pre {
  margin: 0 !important;
  padding: 16px !important;
  background-color: var(--bg-code) !important;
  overflow-x: auto;
  border-radius: 0 !important;
}

/* Info Cards */
.info-card, .success-card, .warning-card {
  padding: 16px 24px;
  margin: var(--space-24) 0;
  border-radius: var(--radius-md);
  border-left: 4px solid;
  background-color: var(--bg-card);
}

.info-card { border-color: var(--accent-info); }
.success-card { border-color: var(--accent-success); }
.warning-card { border-color: var(--accent-warning); }

.info-card h4, .success-card h4, .warning-card h4 {
  margin-top: 0;
  margin-bottom: var(--space-8);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

/* Lists and Tables */
ul, ol {
  padding-left: var(--space-24);
  margin-bottom: var(--space-16);
  color: var(--text-secondary);
}

li { margin-bottom: var(--space-4); }

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-24) 0;
  font-size: 0.9rem;
}

th, td {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  text-align: left;
}

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

/* Feature/Operator Grids */
.feature-grid, .operators-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-16);
  margin: var(--space-24) 0;
}

.feature-card, .operator-card, .search-type-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  transition: transform 0.2s, border-color 0.2s;
}

.feature-card:hover, .operator-card:hover, .search-type-card:hover {
  transform: translateY(-2px);
  border-color: var(--text-secondary);
}

.feature-icon, .search-type-icon {
  font-size: 1.5rem;
  color: var(--accent-primary);
  margin-bottom: var(--space-16);
}

.operator-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-12);
}

.operator-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  background-color: var(--bg-code);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.operator-sql {
  margin-top: var(--space-12);
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  padding: 8px;
  background-color: var(--bg-code);
  border-radius: var(--radius-sm);
}

/* Right TOC */
.right-sidebar {
  width: var(--toc-width);
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  padding: var(--space-24) var(--space-16);
  border-left: 1px solid var(--border-color);
  display: none;
  flex-shrink: 0;
  background-color: var(--bg-body);
}

@media (min-width: 1280px) {
  .right-sidebar { display: block; }
}

.toc-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-12);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.toc-nav {
  display: flex;
  flex-direction: column;
}

.toc-link {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 4px 0 4px 12px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: 0.1s;
}

.toc-link:hover { color: var(--text-primary); }

.toc-link.active {
  color: var(--accent-primary);
  border-left-color: var(--accent-primary);
  font-weight: 500;
}

/* Footer */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding: var(--space-64) 0;
  background-color: var(--bg-sidebar);
}

.footer-container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-24);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-32);
}

.footer-section h4 {
  margin-top: 0;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-16);
  color: var(--text-primary);
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section li { margin-bottom: var(--space-8); }

.footer-section a { color: var(--text-secondary); }
.footer-section a:hover { color: var(--text-primary); }

.footer-bottom {
  margin-top: var(--space-48);
  padding-top: var(--space-24);
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

/* Mobile Responsiveness */
@media (max-width: 1024px) {
  .layout-wrapper { max-width: 100%; }
  .content-container { max-width: 100%; }
  .right-sidebar { display: none; }
}

@media (max-width: 768px) {
  .layout-wrapper { flex-direction: column; }
  
  /* Sidebar handling on mobile */
  .sidebar {
    width: 100%;
    height: auto;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-sidebar);
    z-index: 40;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-right: none;
    padding-bottom: var(--space-64);
  }
  
  .sidebar.active {
    transform: translateX(0);
  }

  /* Header adjustments */
  .header-nav { display: none; }
  .header-container { padding: 0 var(--space-16); }
  
  /* Mobile Menu Button */
  .mobile-menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-8);
    margin-right: var(--space-8);
    z-index: 51;
  }

  .mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background-color: var(--text-secondary);
    border-radius: 2px;
    transition: all 0.3s ease;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Main content spacing */
  .main { padding: var(--space-24) var(--space-16); }
  .hero-title { font-size: 2rem; }
  
  /* Footer layout */
  .footer-container { 
    grid-template-columns: 1fr; 
    gap: var(--space-24); 
    text-align: center; 
  }
}

/* Base styles for mobile menu button (hidden on desktop) */
.mobile-menu-btn {
  display: none;
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.2s;
}

.theme-toggle:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
}

/* Syntax Highlighting overrides for Prism Tomorrow */
code[class*="language-"], pre[class*="language-"] {
  color: var(--text-code);
  text-shadow: none;
  font-family: var(--font-mono);
  font-size: 1em;
  direction: ltr;
  text-align: left;
  white-space: pre;
  word-spacing: normal;
  word-break: normal;
  line-height: 1.5;
}

/* Token colors tailored for dark professional theme */
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: var(--text-tertiary); }
.token.punctuation { color: var(--text-secondary); }
.token.namespace { opacity: .7; }
.token.property, .token.tag, .token.boolean, .token.number, .token.constant, .token.symbol, .token.deleted { color: #79c0ff; }
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted { color: #a5d6ff; }
.token.operator, .token.entity, .token.url, .language-css .token.string, .style .token.string { color: #d2a8ff; }
.token.atrule, .token.attr-value, .token.keyword { color: #ff7b72; }
.token.function, .token.class-name { color: #d2a8ff; }
.token.regex, .token.important, .token.variable { color: #ffa657; }