/* Tables - Enhanced Accessible Data Presentation */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  background-color: var(--color-background);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
  line-height: var(--line-height-tight);
  vertical-align: top;
}

th {
  font-weight: var(--font-weight-semibold);
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  position: sticky;
  top: 0;
  z-index: 1;
  /* Improve header accessibility */
  font-size: var(--font-size-sm);
  letter-spacing: 0.025em;
}

/* Zebra striping for better readability */
tbody tr:nth-child(even) {
  background-color: rgba(0, 0, 0, 0.02);
}

tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.04);
}

/* Responsive table wrapper */
.table-wrapper {
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
}

/* Table utilities */
.table-sm th,
.table-sm td {
  padding: var(--spacing-xs) var(--spacing-sm);
}

.table-lg th,
.table-lg td {
  padding: var(--spacing-md) var(--spacing-lg);
}

/* Numeric columns */
.table-numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum' 1;
}

/* Status indicators in tables */
.table-status {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var/* ==========================================================================
   Accessible Typography Stylesheet
   Based on WCAG 2.1 AA/AAA Guidelines & Modern Best Practices
   ========================================================================== */

/* Root Variables for Consistent Scaling */
:root {
  --base-font-size: 18px !important;
  --line-height-base: 1.6; /* Improved from 1.5 for better readability */
  --line-height-tight: 1.4; /* For headings */
  --line-height-loose: 1.8; /* For long-form content */
  
  /* Enhanced font stacks with better fallbacks */
  --font-family-primary: 'Fredoka', sans-serif;
  --font-family-secondary: 'Poppins', sans-serif;
  --font-family-mono: 'Poppins', sans-serif;
  
  /* Improved spacing scale using modular scale */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-xxl: 3rem;     /* 48px */
  
  /* Enhanced color system with better contrast ratios */
  --color-text-primary: #1a1a1a;     /* Improved contrast: 16.94:1 */
  --color-text-secondary: #4a4a4a;   /* Improved contrast: 8.93:1 */
  --color-text-muted: #6b6b6b;       /* 4.54:1 - meets AA */
  --color-background: #ffffff;
  --color-surface: #f8f9fa;
  --color-link: #0956b3;             /* Improved contrast: 5.77:1 */
  --color-link-hover: #073d80;       /* 8.59:1 */
  --color-link-visited: #6b46c1;     /* 7.02:1 */
  --color-focus: #0956b3;
  --color-focus-ring: rgba(9, 86, 179, 0.25);
  --color-error: #dc2626;
  --color-success: #059669;
  --color-warning: #d97706;
  
  /* Typography scale using perfect fourth (1.333) */
  --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 */
  --font-size-5xl: 3rem;      /* 48px */
  
  /* Font weights */
  --font-weight-light: 100;
  --font-weight-normal: 100;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Border radius */
  --border-radius-sm: 0.125rem;
  --border-radius-md: 0.25rem;
  --border-radius-lg: 0.5rem;
  
  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  
  /* Transition timing */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.25s ease-out;
}

/* Base Typography Settings */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: var(--base-font-size);
  line-height: var(--line-height-base);
  font-family: var(--font-family-primary);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* Improve font rendering */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  padding: 0;
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  /* Enhanced font features for better readability */
  font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1, 'case' 1, 'tnum' 1;
  font-variant-numeric: tabular-nums;
  /* Improve text selection */
  -webkit-tap-highlight-color: transparent;
}

/* Enhanced selection styling */
::selection {
  background: var(--color-focus-ring);
  color: var(--color-text-primary);
}

::-moz-selection {
  background: var(--color-focus-ring);
  color: var(--color-text-primary);
}

/* Headings - Enhanced Accessible Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-light);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.025em;
  /* Improve heading balance */
  text-wrap: balance;
  /* Avoid orphans */
  orphans: 2;
  widows: 2;
  /* Prevent breaking after headings */
  page-break-after: avoid;
  break-after: avoid;
}

h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-lg);
  /* font-weight: var(--font-weight-bold); */
}

h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
  margin-top: var(--spacing-xxl);
}

h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

h6 {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-md);
  /* font-weight: var(--font-weight-bold); */
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Subheadings */
.subheading {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-normal);
  margin-top: calc(var(--spacing-sm) * -1);
  margin-bottom: var(--spacing-lg);
}

/* Paragraph and Text Elements - Enhanced Readability */
p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  max-width: 65ch; /* Optimal line length for readability */
  line-height: var(--line-height-base);
  /* Improve text wrapping */
  text-wrap: pretty;
  /* Prevent widows and orphans */
  orphans: 2;
  widows: 2;
}

/* Long-form content gets better spacing */
.long-form p {
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-loose);
}

/* Lead paragraphs */
.lead {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* Large Text - WCAG 3:1 contrast ratio requirement */
.large-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-base);
}

/* Small Text - Maintain readability with improved minimum size */
small, .small-text {
  font-size: var(--font-size-sm); /* 14px - accessibility minimum */
  line-height: var(--line-height-base);
  color: var(--color-text-secondary);
}

/* Fine print - use sparingly */
.fine-print {
  font-size: var(--font-size-xs);
  line-height: var(--line-height-base);
  color: var(--color-text-muted);
}

/* Text utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.text-justify { text-align: justify; }

/* Font weight utilities */
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Text color utilities */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-error { color: var(--color-error); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }

/* Links - Enhanced Accessible Focus and Hover States */
a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 0.125em;
  text-decoration-thickness: 1px;
  text-decoration-skip-ink: auto;
  transition: all var(--transition-fast);
  /* Improve link hit areas */
  min-height: 44px;
  min-width: 44px;
  display: inline-block;
  /* Reset for inline text links */
  min-height: auto;
  min-width: auto;
  display: inline;
}

a:hover {
  color: var(--color-link-hover);
  text-decoration-thickness: 2px;
}

a:visited {
  color: var(--color-link-visited);
}

a:focus {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--border-radius-sm);
  box-shadow: 0 0 0 4px var(--color-focus-ring);
  /* Ensure focus is visible on all backgrounds */
  text-decoration: none;
}

a:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--border-radius-sm);
  box-shadow: 0 0 0 4px var(--color-focus-ring);
}

/* External links indicator */
a[href^="http"]:not([href*="yourdomain.com"])::after {
  content: " ↗";
  font-size: 0.8em;
  opacity: 0.7;
  margin-left: 0.2em;
}

/* Button-style links */
.link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-link);
  color: var(--color-background);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
}

.link-button:hover {
  background-color: var(--color-link-hover);
  color: var(--color-background);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.link-button:focus {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--color-focus-ring);
}

/* Skip navigation links - Enhanced */
.skip-link {
  position: absolute;
  top: -100vh;
  left: var(--spacing-sm);
  background: var(--color-text-primary);
  color: var(--color-background);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-medium);
  z-index: 1000;
  transition: all var(--transition-fast);
}

.skip-link:focus {
  top: var(--spacing-sm);
  outline: 2px solid var(--color-background);
  outline-offset: 2px;
}

/* Lists - Enhanced Readability and Accessibility */
ul, ol {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-xl);
  max-width: 65ch;
}

li {
  list-style: none;
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-base);
  /* Improve list item spacing */
  padding-left: var(--spacing-xs);
}

/* Nested lists */
ul ul, ol ol, ul ol, ol ul {
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

/* Definition lists */
dl {
  margin-bottom: var(--spacing-md);
}

dt {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
}

dd {
  margin-left: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

/* Custom list styles */
.list-unstyled {
  list-style: none;
  padding-left: 0;
}

.list-inline {
  list-style: none;
  padding-left: 0;
}

.list-inline li {
  display: inline-block;
  margin-right: var(--spacing-md);
  margin-bottom: 0;
}

/* Accessible checkbox/radio list styling */
.list-checklist {
  list-style: none;
  padding-left: 0;
}

.list-checklist li {
  position: relative;
  padding-left: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
}

.list-checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: var(--font-weight-bold);
}

/* Code and Preformatted Text - Enhanced for Accessibility */
code, pre, kbd, samp {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  background-color: var(--color-surface);
  border-radius: var(--border-radius-sm);
  /* Improve code readability */
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'calt' 0; /* Disable ligatures in code */
}

code {
  padding: 0.125em 0.25em;
  color: var(--color-error);
  font-weight: var(--font-weight-medium);
  /* Prevent code from breaking awkwardly */
  white-space: nowrap;
  word-break: keep-all;
}

pre {
  padding: var(--spacing-md);
  line-height: var(--line-height-tight);
  overflow-x: auto;
  white-space: pre;
  margin-bottom: var(--spacing-md);
  border: 1px solid #e5e7eb;
  background-color: var(--color-surface);
  border-radius: var(--border-radius-md);
  /* Improve scrolling experience */
  scrollbar-width: thin;
  scrollbar-color: var(--color-text-muted) transparent;
}

pre::-webkit-scrollbar {
  height: 8px;
}

pre::-webkit-scrollbar-track {
  background: transparent;
}

pre::-webkit-scrollbar-thumb {
  background-color: var(--color-text-muted);
  border-radius: var(--border-radius-sm);
}

pre code {
  padding: 0;
  background: transparent;
  border-radius: 0;
  color: inherit;
  font-size: inherit;
  white-space: pre;
}

/* Keyboard input styling */
kbd {
  padding: 0.125em 0.25em;
  font-size: var(--font-size-xs);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  border: 1px solid #d1d5db;
  border-radius: var(--border-radius-sm);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
  font-weight: var(--font-weight-medium);
}

/* Sample output */
samp {
  padding: 0.125em 0.25em;
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-success);
  font-weight: var(--font-weight-normal);
}

/* Code block with syntax highlighting support */
.code-block {
  position: relative;
  margin-bottom: var(--spacing-md);
}

.code-block pre {
  margin: 0;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-text-primary);
  color: var(--color-background);
  border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* Tables - Accessible Data Presentation */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

th, td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid #dee2e6;
  line-height: 1.4;
}

th {
  font-weight: 600;
  background-color: #f8f9fa;
  color: var(--color-text-primary);
}

/* Forms - Accessible Input Styling */
label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

input, textarea, select {
  font-size: 1rem;
  line-height: var(--line-height-base);
  padding: 0.5rem;
  border: 1px solid #ced4da;
  border-radius: 4px;
}

input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-color: var(--color-focus);
}

/* Blockquotes */
blockquote {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
  border-left: 4px solid var(--color-link);
  font-style: italic;
  color: var(--color-text-secondary);
}

/* Responsive Typography */
@media (max-width: 768px) {
  :root {
    --base-font-size: 16px; /* Maintain minimum on mobile */
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  
  p {
    max-width: 100%;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --color-text-primary: #000000;
    --color-background: #ffffff;
    --color-link: #0000ff;
    --color-link-hover: #0000cc;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-text-primary: #ffffff;
    --color-text-secondary: #adb5bd;
    --color-background: #121212;
    --color-link: #66b3ff;
    --color-link-hover: #4da6ff;
  }
  
  code {
    background-color: #2d2d2d;
    color: #ff6b6b;
  }
  
  pre {
    background-color: #2d2d2d;
    border-color: #404040;
  }
  
  th {
    background-color: #2d2d2d;
  }
  
  td {
    border-color: #404040;
  }
}

/* Print Styles */
@media print {
  * {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a, a:visited {
    text-decoration: underline;
    color: black !important;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
  
  p {
    orphans: 3;
    widows: 3;
  }
}