/* ============================================
   Tefillin Guide - Comprehensive Stylesheet
   RTL Support | WCAG 2.1 AA | Responsive
   ============================================ */

/* CSS Custom Properties (Variables) */
:root {
  /* Color Palette - High Contrast for Accessibility */
  --color-primary: #1a237e;
  --color-primary-light: #3949ab;
  --color-primary-dark: #0d1442;
  --color-secondary: #c9a227;
  --color-secondary-light: #d4b84a;
  
  /* Text Colors - WCAG AA Compliant */
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #4a4a4a;
  --color-text-muted: #666666;
  --color-text-inverse: #ffffff;
  
  /* Background Colors */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-bg-tertiary: #e9ecef;
  --color-bg-dark: #1a1a1a;
  
  /* Semantic Colors */
  --color-success: #2e7d32;
  --color-success-bg: #e8f5e9;
  --color-warning: #f57c00;
  --color-warning-bg: #fff3e0;
  --color-error: #c62828;
  --color-error-bg: #ffebee;
  --color-info: #1565c0;
  --color-info-bg: #e3f2fd;
  
  /* Typography - Using Free Google Fonts */
  --font-family-primary: 'Heebo', sans-serif;
  --font-family-serif: 'Frank Ruhl Libre', serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --line-height-base: 1.7;
  --line-height-heading: 1.3;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Focus Ring - Accessibility */
  --focus-ring: 0 0 0 3px rgba(26, 35, 126, 0.4);
  --focus-ring-offset: 2px;
  
  /* Container */
  --container-max-width: 1200px;
  --container-padding: var(--spacing-lg);
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-secondary);
  direction: rtl;
  text-align: right;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================
   Accessibility - Skip Link
   ============================================ */

.skip-link {
  position: absolute;
  top: -100%;
  right: var(--spacing-md);
  z-index: 9999;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--spacing-md);
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ============================================
   Focus Styles - Accessibility
   ============================================ */

:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: var(--focus-ring-offset);
}

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

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: var(--focus-ring-offset);
  box-shadow: var(--focus-ring);
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

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

strong {
  font-weight: 700;
}

/* ============================================
   Layout - Container
   ============================================ */

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

/* ============================================
   Header
   ============================================ */

.site-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  padding: var(--spacing-xl) 0;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.header-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
}

.logo-section {
  flex: 1;
  min-width: 250px;
}

.site-title {
  font-size: var(--font-size-3xl);
  color: var(--color-text-inverse);
  margin-bottom: var(--spacing-xs);
}

.site-subtitle {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0;
}

.header-nav {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-text-inverse);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all var(--transition-base);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: rgba(255, 255, 255, 0.25);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
}

/* ============================================
   Main Content
   ============================================ */

.main-content {
  flex: 1;
  padding: var(--spacing-2xl) 0;
}

/* ============================================
   Introduction Section
   ============================================ */

.intro-section {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  color: var(--color-primary);
  border-bottom: 3px solid var(--color-secondary);
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.intro-text {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 80ch;
}

/* ============================================
   Note Boxes
   ============================================ */

.note-box,
.tip-box,
.warning-box,
.info-box {
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  border-right: 4px solid;
}

.note-box {
  background-color: var(--color-info-bg);
  border-color: var(--color-info);
}

.tip-box {
  background-color: var(--color-success-bg);
  border-color: var(--color-success);
}

.warning-box {
  background-color: var(--color-error-bg);
  border-color: var(--color-error);
}

.info-box {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning);
}

/* ============================================
   Table of Contents
   ============================================ */

.toc {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-2xl);
}

.toc-title {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.toc-list {
  list-style-position: inside;
  padding: 0;
}

.toc-list li {
  margin-bottom: var(--spacing-md);
}

.toc-link {
  font-size: var(--font-size-lg);
  text-decoration: none;
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
  display: inline-block;
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.toc-link:hover,
.toc-link:focus {
  color: var(--color-primary);
  background-color: var(--color-info-bg);
}

/* ============================================
   Guide Sections
   ============================================ */

.guide-section {
  background-color: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-2xl);
  overflow: hidden;
}

.part-title {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-text-inverse);
  padding: var(--spacing-xl);
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.part-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-secondary);
  color: var(--color-primary-dark);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  font-weight: 700;
  min-width: 80px;
}

/* ============================================
   Step Cards
   ============================================ */

.step-card {
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--color-bg-tertiary);
}

.step-card:last-child {
  border-bottom: none;
}

.step-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xl);
  font-weight: 700;
  flex-shrink: 0;
}

.step-title {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  margin-bottom: 0;
}

.step-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

.step-text {
  order: 1;
}

.step-illustration {
  order: 2;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

/* ============================================
   Illustrations (SVG)
   ============================================ */

.illustration {
  width: 100%;
  max-width: 300px;
  min-height: 200px;
  height: auto;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 2px solid var(--color-bg-tertiary);
  display: block;
}

.large-illustration {
  max-width: 400px;
}

/* ============================================
   Lists
   ============================================ */

.placement-list,
.numbered-steps {
  padding-right: var(--spacing-xl);
  margin: var(--spacing-md) 0;
}

.placement-list li,
.numbered-steps li {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-base);
}

/* ============================================
   Blessing & Verse Boxes
   ============================================ */

.blessing-box,
.verse-box {
  background: linear-gradient(135deg, #fef9e7 0%, #fdf6e3 100%);
  border: 2px solid var(--color-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-lg) 0;
  text-align: center;
}

.blessing-text,
.verse-text {
  font-family: var(--font-family-serif);
  font-size: var(--font-size-xl);
  line-height: 2;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.verse-source {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--spacing-md);
  margin-bottom: 0;
}

/* ============================================
   Comparison Table
   ============================================ */

.comparison-table {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: var(--spacing-lg) 0;
}

.table-header {
  display: contents;
}

.table-row {
  display: contents;
}

.table-cell {
  padding: var(--spacing-md);
  background-color: var(--color-bg-primary);
  text-align: center;
}

.header-cell {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: 700;
}

.highlight-cell {
  background-color: var(--color-warning-bg);
  font-weight: 600;
}

/* ============================================
   Summary Section
   ============================================ */

.summary-section {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-2xl);
}

.summary-steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.summary-step {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  border-right: 4px solid var(--color-primary);
}

.summary-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  font-weight: 700;
  flex-shrink: 0;
}

.summary-text {
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  padding: var(--spacing-2xl) 0;
  margin-top: auto;
}

.footer-content {
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-link {
  color: var(--color-text-inverse);
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.footer-link:hover,
.footer-link:focus {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-secondary);
}

.footer-disclaimer {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  max-width: 80ch;
  margin: 0 auto var(--spacing-md);
  line-height: 1.6;
}

.footer-copyright {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0;
}

/* ============================================
   Responsive Design - Tablet
   ============================================ */

@media screen and (max-width: 992px) {
  :root {
    --font-size-base: 15px;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
  }
  
  .step-content {
    grid-template-columns: 1fr;
  }
  
  .step-illustration {
    order: 1;
    margin-bottom: var(--spacing-lg);
  }
  
  .step-text {
    order: 2;
  }
  
  .comparison-table {
    font-size: var(--font-size-sm);
  }
}

/* ============================================
   Responsive Design - Mobile
   ============================================ */

@media screen and (max-width: 768px) {
  :root {
    --font-size-base: 14px;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
    --container-padding: var(--spacing-md);
  }
  
  .header-content {
    flex-direction: column;
    text-align: center;
  }
  
  .header-nav {
    width: 100%;
    justify-content: center;
  }
  
  .btn-secondary {
    flex: 1;
    justify-content: center;
    min-width: 120px;
  }
  
  .part-title {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }
  
  .step-header {
    flex-direction: column;
    text-align: center;
  }
  
  .step-number {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-lg);
  }
  
  .intro-section,
  .toc,
  .step-card,
  .summary-section {
    padding: var(--spacing-lg);
  }
  
  .blessing-box,
  .verse-box {
    padding: var(--spacing-md);
  }
  
  .blessing-text,
  .verse-text {
    font-size: var(--font-size-lg);
  }
  
  .comparison-table {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  .table-header {
    display: none;
  }
  
  .table-row {
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-bg-tertiary);
  }
  
  .table-cell {
    text-align: right;
    padding: var(--spacing-md);
  }
  
  .table-cell:first-child {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    font-weight: 700;
  }
  
  .summary-step {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }
  
  .footer-links {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .illustration {
    max-width: 100%;
  }
}

/* ============================================
   Responsive Design - Small Mobile
   ============================================ */

@media screen and (max-width: 480px) {
  :root {
    --font-size-base: 13px;
    --spacing-lg: 1rem;
    --spacing-xl: 1.25rem;
    --spacing-2xl: 1.5rem;
  }
  
  .site-title {
    font-size: var(--font-size-2xl);
  }
  
  .btn-secondary {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  body {
    background-color: white;
    color: black;
  }
  
  .site-header,
  .site-footer,
  .skip-link,
  .header-nav {
    display: none;
  }
  
  .guide-section,
  .intro-section,
  .toc,
  .summary-section {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
  
  .step-content {
    grid-template-columns: 1fr;
  }
  
  a {
    text-decoration: none;
    color: inherit;
  }
  
  .illustration {
    max-width: 200px;
  }
}

/* ============================================
   High Contrast Mode
   ============================================ */

@media (prefers-contrast: high) {
  :root {
    --color-primary: #000080;
    --color-text-primary: #000000;
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f0f0f0;
  }
  
  .btn-secondary {
    border-width: 3px;
  }
  
  .step-card {
    border: 2px solid #000;
  }
  
  .note-box,
  .tip-box,
  .warning-box,
  .info-box {
    border-width: 6px;
  }
}

/* ============================================
   Dark Mode Support (Optional)
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #1e1e1e;
    --color-bg-secondary: #121212;
    --color-bg-tertiary: #2d2d2d;
    --color-text-primary: #e0e0e0;
    --color-text-secondary: #b0b0b0;
    --color-text-muted: #808080;
  }
  
  .illustration {
    background-color: var(--color-bg-tertiary);
    border-color: #444;
  }
  
  .blessing-box,
  .verse-box {
    background: linear-gradient(135deg, #2d2a1e 0%, #3d3a2e 100%);
  }
  
  .blessing-text,
  .verse-text {
    color: var(--color-text-primary);
  }
}

/* ============================================
   Animation Classes
   ============================================ */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.animate-on-scroll.fade-in {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Utility Classes
   ============================================ */

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

.text-center {
  text-align: center;
}

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

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}