/**
 * Emma Documentation Theme - Main Stylesheet
 * A clean, modern theme inspired by Emma Forms default theme
 * Using vanilla CSS with CSS custom properties
 */

/* ============================================
   CSS Variables (Design Tokens)
   ============================================ */
:root {
  /* Colors - Primary Palette */
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-light: rgba(59, 130, 246, 0.1);
  
  /* Colors - Neutral Palette */
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-text-lighter: #9ca3af;
  --color-background: #ffffff;
  --color-background-alt: #f9fafb;
  --color-border: #e5e7eb;
  --color-border-dark: #d1d5db;
  
  /* Colors - Semantic */
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;
  
  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Monaco,
    Consolas, 'Liberation Mono', 'Courier New', monospace;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 1.875rem;    /* 30px */
  --font-size-4xl: 2.25rem;     /* 36px */
  
  /* Spacing */
  --spacing-xs: 0.25rem;    /* 4px */
  --spacing-sm: 0.5rem;     /* 8px */
  --spacing-md: 1rem;       /* 16px */
  --spacing-lg: 1.5rem;     /* 24px */
  --spacing-xl: 2rem;       /* 32px */
  --spacing-2xl: 3rem;      /* 48px */
  --spacing-3xl: 4rem;      /* 64px */
  
  /* Layout */
  --border-radius: 6px;
  --border-radius-lg: 8px;
  --max-width-content: 1200px;
  --max-width-text: 720px;
  --sidebar-width: 280px;
  --header-height: 64px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
}

/* Dark mode color overrides */
@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #f3f4f6;
    --color-text-light: #d1d5db;
    --color-text-lighter: #9ca3af;
    --color-background: #111827;
    --color-background-alt: #1f2937;
    --color-border: #374151;
    --color-border-dark: #4b5563;
  }
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
}

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

h1 { font-size: var(--font-size-3xl); margin-bottom: var(--spacing-lg); }
h2 { font-size: var(--font-size-2xl); margin-top: var(--spacing-xl); }
h3 { font-size: var(--font-size-xl); margin-top: var(--spacing-lg); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p {
  margin: 0 0 var(--spacing-md);
  line-height: 1.7;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

code {
  font-family: var(--font-family-mono);
  font-size: 0.875em;
  padding: 0.125rem 0.25rem;
  background-color: var(--color-background-alt);
  border: 1px solid var(--color-border);
  border-radius: 3px;
}

pre {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  padding: var(--spacing-md);
  background-color: var(--color-background-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
}

pre code {
  padding: 0;
  background: none;
  border: none;
}

blockquote {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-background-alt);
  color: var(--color-text-light);
}

ul, ol {
  margin: 0 0 var(--spacing-md);
  padding-left: var(--spacing-xl);
}

li {
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Layout Structure
   ============================================ */
.site-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

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

.site-logo {
  display: flex;
  align-items: center;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* Navigation */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-link--active {
  color: var(--color-primary);
}

/* Main Content Layout */
.main-content {
  display: flex;
  flex: 1;
  max-width: var(--max-width-content);
  margin: 0 auto;
  width: 100%;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  padding: var(--spacing-xl) var(--spacing-lg);
  border-right: 1px solid var(--color-border);
  background-color: var(--color-background);
  overflow-y: auto;
  height: calc(100vh - var(--header-height));
  position: sticky;
  top: var(--header-height);
}

.sidebar-nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-nav li {
  margin-bottom: var(--spacing-sm);
}

.sidebar-nav a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.sidebar-nav a:hover {
  background-color: var(--color-background-alt);
  color: var(--color-primary);
  text-decoration: none;
}

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

.sidebar-section-title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-lighter);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

/* Content Area */
.content-area {
  flex: 1;
  padding: var(--spacing-xl);
  max-width: var(--max-width-text);
  margin: 0 auto;
}

.content-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  margin-bottom: var(--spacing-sm);
}

.page-meta {
  display: flex;
  gap: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* Footer */
.site-footer {
  margin-top: auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  background-color: var(--color-background-alt);
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

/* ============================================
   Components
   ============================================ */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  color: #ffffff;
  background-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  text-decoration: none;
}

/* Cards */
.card {
  padding: var(--spacing-lg);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
}

/* Alerts/Notices */
.notice {
  padding: var(--spacing-md) var(--spacing-lg);
  margin: var(--spacing-md) 0;
  border-left: 4px solid;
  border-radius: var(--border-radius);
}

.notice-info {
  background-color: rgba(59, 130, 246, 0.1);
  border-color: var(--color-info);
  color: var(--color-text);
}

.notice-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border-color: var(--color-warning);
  color: var(--color-text);
}

.notice-success {
  background-color: rgba(16, 185, 129, 0.1);
  border-color: var(--color-success);
  color: var(--color-text);
}

/* Tables */
table {
  width: 100%;
  margin: var(--spacing-md) 0;
  border-collapse: collapse;
}

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

th {
  font-weight: 600;
  background-color: var(--color-background-alt);
}

tr:hover {
  background-color: var(--color-background-alt);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  padding: var(--spacing-sm);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  color: var(--color-text);
}

.mobile-menu-toggle:hover {
  background-color: var(--color-background-alt);
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablet and below */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 240px;
  }
  
  .content-area {
    padding: var(--spacing-lg);
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }
  
  .header-content {
    padding: 0 var(--spacing-md);
  }
  
  .site-nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .main-content {
    flex-direction: column;
  }
  
  .sidebar {
    display: none;
    width: 100%;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  
  .sidebar.active {
    display: block;
  }
  
  .content-area {
    padding: var(--spacing-md);
  }
  
  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }
  h3 { font-size: var(--font-size-lg); }
}

/* Small mobile */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .header-content {
    padding: 0 var(--spacing-sm);
  }
  
  .content-area {
    padding: var(--spacing-sm);
  }
}

/* ============================================
   Accessibility
   ============================================ */

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip to content link for screen readers */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  z-index: 1000;
}

.skip-to-content:focus {
  top: 0;
}

/* ============================================
   Page Navigation
   ============================================ */

/* Pagination between pages */
.pagination {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.pagination-links {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.pagination-prev,
.pagination-next {
  flex: 1;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  max-width: 48%;
}

.pagination-prev {
  text-align: left;
}

.pagination-next {
  text-align: right;
}

.pagination-prev:hover,
.pagination-next:hover {
  border-color: var(--color-primary);
  background-color: var(--color-background-alt);
  text-decoration: none;
}

/* Page Lists */
.page-list {
  margin-top: var(--spacing-xl);
}

.page-list-item {
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.page-list-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.page-list-title {
  margin: 0 0 var(--spacing-sm);
  font-size: var(--font-size-xl);
}

.page-list-title a {
  color: var(--color-text);
}

.page-list-title a:hover {
  color: var(--color-primary);
}

.page-list-description {
  margin: 0 0 var(--spacing-sm);
  color: var(--color-text-light);
}

.page-list-meta {
  display: block;
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-light); }
.text-small { font-size: var(--font-size-sm); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}