/**
 * PII-Fi API Documentation - Technical Documentation Style
 * Inspired by Google Cloud API Documentation
 */

/* ============================================
   Variables
   ============================================ */
:root {
  /* Colors */
  --color-primary: #1a73e8;
  --color-primary-dark: #1557b0;
  --color-primary-light: #e8f0fe;
  --color-secondary: #5f6368;
  --color-text: #202124;
  --color-text-secondary: #5f6368;
  --color-text-tertiary: #80868b;
  --color-border: #dadce0;
  --color-border-light: #e8eaed;
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-bg-code: #f1f3f4;
  --color-success: #1e8e3e;
  --color-warning: #f9ab00;
  --color-error: #d93025;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Source Code Pro', Consolas, Monaco, 'Andale Mono', monospace;

  /* Spacing */
  --sidebar-width: 280px;
  --header-height: 64px;
  --content-max-width: 900px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --shadow-md: 0 1px 3px 0 rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 1rem 0;
  line-height: 1.3;
}

h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

h2 {
  font-size: 1.75rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

h3 {
  font-size: 1.375rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 1.125rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

p {
  margin: 0 0 1rem 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* ============================================
   Header
   ============================================ */
.docs-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 24px;
}

.docs-header__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.docs-header__logo:hover {
  text-decoration: none;
}

.docs-header__logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary), #4285f4);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 14px;
}

.docs-header__title {
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-left: 8px;
  padding-left: 12px;
  border-left: 1px solid var(--color-border);
}

.docs-header__nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 24px;
}

.docs-header__nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.docs-header__nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* ============================================
   Layout
   ============================================ */
.docs-container {
  display: flex;
  padding-top: var(--header-height);
  min-height: 100vh;
}

/* ============================================
   Sidebar
   ============================================ */
.docs-sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--header-height));
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  padding: 24px 0;
  z-index: 900;
}

.docs-sidebar__section {
  margin-bottom: 24px;
}

.docs-sidebar__title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  padding: 0 24px;
  margin-bottom: 8px;
}

.docs-sidebar__nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.docs-sidebar__nav li {
  margin: 0;
}

.docs-sidebar__nav a {
  display: block;
  padding: 8px 24px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}

.docs-sidebar__nav a:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
  text-decoration: none;
}

.docs-sidebar__nav a.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: 500;
}

.docs-sidebar__nav--nested {
  padding-left: 16px;
}

.docs-sidebar__nav--nested a {
  font-size: 0.8125rem;
  padding: 6px 24px 6px 40px;
}

/* ============================================
   Main Content
   ============================================ */
.docs-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 40px 48px 80px;
  max-width: calc(var(--content-max-width) + var(--sidebar-width) + 96px);
}

.docs-content {
  max-width: var(--content-max-width);
}

/* ============================================
   Code Blocks
   ============================================ */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-bg-code);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  color: var(--color-text);
}

pre {
  margin: 0 0 1.5rem 0;
  padding: 0;
  background: #1e1e1e;
  border-radius: 8px;
  overflow: hidden;
}

pre code {
  display: block;
  padding: 16px 20px;
  background: none;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #d4d4d4;
  overflow-x: auto;
  border-radius: 0;
}

/* Code block header */
.code-block {
  margin: 0 0 1.5rem 0;
  border-radius: 8px;
  overflow: hidden;
  background: #1e1e1e;
}

.code-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: #2d2d2d;
  border-bottom: 1px solid #3d3d3d;
}

.code-block__lang {
  font-size: 0.75rem;
  font-weight: 500;
  color: #9d9d9d;
  text-transform: uppercase;
}

.code-block__copy {
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  color: #9d9d9d;
  background: transparent;
  border: 1px solid #4d4d4d;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.code-block__copy:hover {
  background: #3d3d3d;
  color: #fff;
}

.code-block pre {
  margin: 0;
  border-radius: 0;
}

/* Syntax highlighting */
.code-keyword { color: #569cd6; }
.code-string { color: #ce9178; }
.code-number { color: #b5cea8; }
.code-comment { color: #6a9955; }
.code-function { color: #dcdcaa; }
.code-variable { color: #9cdcfe; }
.code-property { color: #9cdcfe; }

/* ============================================
   Tables
   ============================================ */
.docs-table {
  width: 100%;
  margin: 0 0 1.5rem 0;
  border-collapse: collapse;
  font-size: 0.875rem;
}

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

.docs-table th {
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-bg-secondary);
  border-bottom: 2px solid var(--color-border);
}

.docs-table tr:hover {
  background: var(--color-bg-secondary);
}

.docs-table code {
  font-size: 0.8125rem;
}

/* Parameter tables */
.param-table {
  margin: 1rem 0 1.5rem 0;
}

.param-table th:first-child,
.param-table td:first-child {
  width: 180px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.param-table td:nth-child(2) {
  width: 80px;
  text-align: center;
}

.param-required {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 4px;
}

.param-optional {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  background: var(--color-bg-secondary);
  color: var(--color-text-tertiary);
  border-radius: 4px;
}

/* ============================================
   API Endpoint Blocks
   ============================================ */
.api-endpoint {
  margin: 1.5rem 0;
  padding: 16px 20px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  display: flex;
  align-items: center;
  gap: 12px;
}

.api-method {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  border-radius: 4px;
  letter-spacing: 0.02em;
}

.api-method--get {
  background: #e6f4ea;
  color: #1e8e3e;
}

.api-method--post {
  background: #e8f0fe;
  color: #1a73e8;
}

.api-method--put {
  background: #fef7e0;
  color: #f9ab00;
}

.api-method--delete {
  background: #fce8e6;
  color: #d93025;
}

.api-path {
  color: var(--color-text);
}

/* ============================================
   Callouts / Alerts
   ============================================ */
.callout {
  margin: 1.5rem 0;
  padding: 16px 20px;
  border-radius: 8px;
  border-left: 4px solid;
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout-title {
  font-weight: 600;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout--note {
  background: #e8f0fe;
  border-color: var(--color-primary);
}

.callout--note .callout-title {
  color: var(--color-primary);
}

.callout--warning {
  background: #fef7e0;
  border-color: var(--color-warning);
}

.callout--warning .callout-title {
  color: #e37400;
}

.callout--tip {
  background: #e6f4ea;
  border-color: var(--color-success);
}

.callout--tip .callout-title {
  color: var(--color-success);
}

.callout--important {
  background: #fce8e6;
  border-color: var(--color-error);
}

.callout--important .callout-title {
  color: var(--color-error);
}

/* ============================================
   Lists
   ============================================ */
ul, ol {
  margin: 0 0 1rem 0;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

li > ul, li > ol {
  margin-top: 0.5rem;
  margin-bottom: 0;
}

/* ============================================
   Response Examples
   ============================================ */
.response-example {
  margin: 1.5rem 0;
}

.response-example__header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.response-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
}

.response-status--success {
  background: #e6f4ea;
  color: #1e8e3e;
}

.response-status--error {
  background: #fce8e6;
  color: #d93025;
}

/* ============================================
   Tabs
   ============================================ */
.code-tabs {
  margin: 1.5rem 0;
}

.code-tabs__nav {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 0;
  gap: 0;
}

.code-tabs__btn {
  padding: 12px 20px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: -1px;
}

.code-tabs__btn:hover {
  color: var(--color-primary);
}

.code-tabs__btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.code-tabs__content {
  display: none;
}

.code-tabs__content.active {
  display: block;
}

/* ============================================
   Entity Type Cards
   ============================================ */
.entity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin: 1.5rem 0;
}

.entity-card {
  padding: 16px 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: all 0.2s ease;
}

.entity-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.entity-card__type {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.entity-card__name {
  font-weight: 600;
  margin-bottom: 4px;
}

.entity-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0 0 8px 0;
}

.entity-card__example {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-tertiary);
  background: var(--color-bg-secondary);
  padding: 6px 10px;
  border-radius: 4px;
  margin-top: 8px;
}

/* Context analysis entity cards */
.entity-card--context {
  border-left: 3px solid var(--color-primary);
  background: linear-gradient(to right, var(--color-primary-light), var(--color-bg));
}

.entity-card--context .entity-card__type {
  color: var(--color-primary-dark);
}

.section-note {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  font-style: italic;
}

.context-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 2rem 0;
  padding: 16px 20px;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary);
  border-radius: 8px;
}

.context-note i {
  color: var(--color-primary);
  font-size: 1.25rem;
  margin-top: 2px;
}

.context-note p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
}

.context-note a {
  font-weight: 500;
}

/* ============================================
   Feature Cards
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin: 2rem 0;
}

.feature-card {
  padding: 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transition: all 0.2s ease;
}

.feature-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 24px;
}

.feature-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* ============================================
   Workflow Diagram
   ============================================ */
.workflow {
  margin: 2rem 0;
  padding: 24px;
  background: var(--color-bg-secondary);
  border-radius: 12px;
}

.workflow__steps {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.workflow__step {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
}

.workflow__step--highlight {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.workflow__arrow {
  font-size: 1.25rem;
  color: var(--color-text-tertiary);
}

/* ============================================
   Quick Links
   ============================================ */
.quick-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin: 2rem 0;
}

.quick-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  transition: all 0.2s ease;
}

.quick-link:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  text-decoration: none;
}

.quick-link__icon {
  font-size: 1.5rem;
}

.quick-link__text {
  font-weight: 500;
}

/* ============================================
   Breadcrumb
   ============================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb__separator {
  color: var(--color-text-tertiary);
}

/* ============================================
   Footer
   ============================================ */
.docs-footer {
  margin-left: var(--sidebar-width);
  padding: 40px 48px;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}

.docs-footer__content {
  max-width: var(--content-max-width);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.docs-footer__nav {
  display: flex;
  gap: 24px;
}

.docs-footer__nav a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.docs-footer__copyright {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 240px;
  }

  .docs-main {
    padding: 32px;
  }
}

@media (max-width: 768px) {
  .docs-sidebar {
    position: fixed;
    left: -100%;
    transition: left 0.3s ease;
  }

  .docs-sidebar.open {
    left: 0;
  }

  .docs-main {
    margin-left: 0;
    padding: 24px 16px;
  }

  .docs-footer {
    margin-left: 0;
    padding: 24px 16px;
  }

  .docs-header__nav {
    display: none;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.375rem;
  }

  h3 {
    font-size: 1.125rem;
  }

  .api-endpoint {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.8125rem;
  }

  .feature-grid,
  .entity-grid {
    grid-template-columns: 1fr;
  }

  .workflow__steps {
    flex-direction: column;
  }

  .workflow__arrow {
    transform: rotate(90deg);
  }
}

/* ============================================
   Dark Mode Support (optional)
   ============================================ */
@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #e8eaed;
    --color-text-secondary: #9aa0a6;
    --color-text-tertiary: #80868b;
    --color-bg: #202124;
    --color-bg-secondary: #292a2d;
    --color-bg-code: #35363a;
    --color-border: #3c4043;
    --color-border-light: #3c4043;
    --color-primary-light: #1a4073;
  }

  .docs-header,
  .docs-sidebar {
    background: var(--color-bg);
  }

  pre {
    background: #0d1117;
  }

  pre code {
    color: #c9d1d9;
  }

  .code-block {
    background: #0d1117;
  }

  .code-block__header {
    background: #161b22;
    border-color: #30363d;
  }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  .docs-header,
  .docs-sidebar,
  .docs-footer {
    display: none;
  }

  .docs-main {
    margin: 0;
    padding: 0;
  }

  pre {
    white-space: pre-wrap;
    word-wrap: break-word;
  }
}