/* ============================================
   Οι ιστορίες που έλεγε η γιαγιά - Επαγγελματικό CSS
   Σχεδιασμός: Μοντέρνα ελληνική λογοτεχνική αισθητική
   ============================================ */

/* Google Fonts - Ελληνικές γραμματοσειρές */
@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:wght@400;500;600;700&family=Lora:ital,wght@0,400;0,600;1,400&family=Noto+Serif:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  /* Χρωματική παλέτα - Εμπνευσμένη από την ελληνική γη */
  --primary-bg: #faf8f3;
  --secondary-bg: #f4f0e8;
  --text-primary: #2c2416;
  --text-secondary: #5a4a3a;
  --accent-gold: #b8935e;
  --accent-deep: #7b5b3b;
  --accent-light: #d4c2a3;
  --border-soft: #e6dcc8;
  --shadow-subtle: rgba(123, 91, 59, 0.08);
  --shadow-medium: rgba(123, 91, 59, 0.15);
  
  /* Τυπογραφία */
  --font-display: 'Crimson Pro', 'Noto Serif', Georgia, serif;
  --font-body: 'Lora', 'Noto Serif', Georgia, serif;
  --font-accent: 'Noto Serif', Georgia, serif;
  
  /* Μεγέθη */
  --max-width: 820px;
  --max-width-narrow: 720px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  
  /* Ρυθμός γραμμής */
  --line-height-tight: 1.4;
  --line-height-normal: 1.7;
  --line-height-loose: 1.85;
  
  /* Μεταβάσεις */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s ease-out;
  
  /* Sticky nav height */
  --nav-height: 60px;
}

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

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

html {
  font-size: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  color: var(--text-primary);
  background: linear-gradient(to bottom, var(--primary-bg) 0%, var(--secondary-bg) 100%);
  background-attachment: fixed;
  line-height: var(--line-height-loose);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Skip to content link for accessibility */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-deep);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  font-weight: bold;
  z-index: 10000;
  border-radius: 0 0 4px 0;
}

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

/* Επιλογή κειμένου */
::selection {
  background: var(--accent-light);
  color: var(--text-primary);
}

::-moz-selection {
  background: var(--accent-light);
  color: var(--text-primary);
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--accent-deep);
  position: relative;
  padding-bottom: 0.5rem;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(to right, var(--accent-gold), transparent);
  border-radius: 2px;
}

h3 {
  font-size: 1.35rem;
  margin-top: var(--spacing-md);
  color: var(--text-secondary);
}

p {
  margin-bottom: var(--spacing-sm);
  text-align: justify;
  hyphens: auto;
  -webkit-hyphens: auto;
  -moz-hyphens: auto;
}

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

/* ============================================
   Layout Containers
   ============================================ */

.site-header,
.site-footer,
.content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
  animation: fadeInUp 0.6s ease-out;
}

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

/* ============================================
   Sticky Navigation Bar
   ============================================ */

.sticky-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 15px var(--shadow-subtle);
  border-bottom: 2px solid var(--border-soft);
  animation: slideDown 0.4s ease-out;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.sticky-nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.sticky-nav-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-deep);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
  flex-shrink: 1;
}

.sticky-nav-buttons {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.sticky-nav-buttons a {
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-deep));
  color: white;
  border: none;
  border-radius: 5px;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  box-shadow: 0 2px 8px var(--shadow-medium);
  transition: all var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.sticky-nav-buttons a:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-medium);
}

.sticky-nav-buttons a:active {
  transform: translateY(0);
}

/* Εικονίδια για sticky nav */
.sticky-nav-buttons a[href*="index"]::before {
  content: '📚';
  font-size: 1rem;
}

.sticky-nav-buttons a.nav-prev::before {
  content: '←';
  font-size: 1rem;
}

.sticky-nav-buttons a.nav-next::after {
  content: '→';
  font-size: 1rem;
}

/* ============================================
   Breadcrumbs
   ============================================ */

.breadcrumbs {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm) 0;
}

.breadcrumbs a {
  color: var(--accent-deep);
  text-decoration: none;
  border-bottom: none;
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--accent-gold);
}

.breadcrumbs span {
  margin: 0 0.5rem;
  opacity: 0.5;
}

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

.site-header {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.6) 100%);
  border-radius: 12px;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 4px 20px var(--shadow-subtle);
  border: 1px solid var(--border-soft);
  position: relative;
  overflow: hidden;
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(to right, var(--accent-gold), var(--accent-deep), var(--accent-gold));
}

.site-header h1 {
  margin: 0 0 var(--spacing-sm) 0;
  font-size: 2.75rem;
  letter-spacing: 0.01em;
  color: var(--accent-deep);
  text-shadow: 1px 1px 2px var(--shadow-subtle);
  font-weight: 700;
}

.site-header .subtitle {
  margin: 0 0 var(--spacing-md) 0;
  font-size: 1.15rem;
  color: var(--text-secondary);
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.site-header .meta {
  margin: var(--spacing-md) 0 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-family: var(--font-body);
  opacity: 0.85;
}

/* ============================================
   Content Area
   ============================================ */

.content {
  background: rgba(255, 255, 255, 0.85);
  border-radius: 10px;
  box-shadow: 0 2px 15px var(--shadow-subtle);
  padding: var(--spacing-xl) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(10px);
}

.content > *:first-child {
  margin-top: 0;
}

.content > *:last-child {
  margin-bottom: 0;
}

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

.toc {
  list-style: none;
  padding: 0;
  margin: var(--spacing-md) 0 var(--spacing-lg);
  counter-reset: toc-counter;
}

.toc li {
  counter-increment: toc-counter;
  margin: 0.65rem 0;
  padding-left: 2.5rem;
  position: relative;
  line-height: var(--line-height-normal);
  transition: all var(--transition-smooth);
}

.toc li::before {
  content: counter(toc-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.1rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-gold);
  width: 2rem;
  text-align: right;
}

.toc li:hover {
  transform: translateX(8px);
}

.toc a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  display: inline-block;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.toc a:hover {
  color: var(--accent-deep);
  border-bottom-color: var(--accent-gold);
}

/* ============================================
   Links
   ============================================ */

a {
  color: var(--accent-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-light);
  transition: all var(--transition-fast);
  padding-bottom: 1px;
}

a:hover,
a:focus {
  color: var(--accent-gold);
  border-bottom-color: var(--accent-gold);
  outline: none;
}

/* ============================================
   Definition List (Glossary)
   ============================================ */

dl {
  margin: var(--spacing-md) 0 var(--spacing-lg);
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  border-left: 4px solid var(--accent-gold);
}

dt {
  font-weight: 700;
  font-family: var(--font-display);
  margin-top: var(--spacing-sm);
  color: var(--accent-deep);
  font-size: 1.05rem;
}

dt:first-child {
  margin-top: 0;
}

dd {
  margin: 0.3rem 0 var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
}

/* ============================================
   Navigation Links (Bottom of Story Pages)
   ============================================ */

.nav-links {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 2px solid var(--border-soft);
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.nav-links a {
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-deep));
  color: white;
  border-radius: 6px;
  border: none;
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 3px 12px var(--shadow-medium);
  transition: all var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px var(--shadow-medium);
}

.nav-links a:active {
  transform: translateY(-1px);
}

/* Βελάκια για navigation */
.nav-links a[href*="index"]::before,
.nav-links a:first-child::before {
  content: '←';
  font-size: 1.1rem;
}

.nav-links a:last-child:not([href*="index"])::after {
  content: '→';
  font-size: 1.1rem;
}

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

.site-footer {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: var(--spacing-lg) var(--spacing-md);
  margin-top: auto;
  border-top: 1px solid var(--border-soft);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(5px);
}

.site-footer p {
  margin: 0;
  opacity: 0.8;
}

/* ============================================
   Ordered & Unordered Lists
   ============================================ */

ol:not(.toc), ul:not(.toc) {
  margin: var(--spacing-sm) 0 var(--spacing-md);
  padding-left: 2rem;
}

ol:not(.toc) li, ul:not(.toc) li {
  margin: 0.4rem 0;
  line-height: var(--line-height-normal);
}

/* ============================================
   Blockquotes
   ============================================ */

blockquote {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 4px solid var(--accent-gold);
  background: rgba(212, 194, 163, 0.1);
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--text-secondary);
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* ============================================
   Emphasis & Strong
   ============================================ */

em, i {
  font-style: italic;
  color: var(--text-secondary);
}

strong, b {
  font-weight: 700;
  color: var(--accent-deep);
}

/* ============================================
   Horizontal Rule
   ============================================ */

hr {
  border: none;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--accent-light), transparent);
  margin: var(--spacing-lg) 0;
}

/* ============================================
   Social Proof Section
   ============================================ */

.stats-section {
  margin: 60px 0;
  padding: 40px 0;
  border-top: 2px solid #8b4513;
  border-bottom: 2px solid #8b4513;
  text-align: center;
}

.stats-section h2 {
  color: #8b4513;
  font-size: 2rem;
  margin-bottom: 40px;
  text-align: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.stat-card {
  background: linear-gradient(135deg, #f4e4c1 0%, #e8d4b1 100%);
  border: 2px solid #8b4513;
  border-radius: 12px;
  padding: 30px 20px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(139, 69, 19, 0.3);
}

.stat-icon {
  font-size: 3rem;
  margin-bottom: 15px;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: bold;
  color: #2c1810;
  margin-bottom: 10px;
  font-family: Georgia, serif;
}

.stat-label {
  font-size: 1rem;
  color: #654321;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.github-badge {
  margin: 40px 0;
  text-align: center;
}

.github-badge img {
  transition: transform 0.3s ease;
}

.github-badge a:hover img {
  transform: scale(1.1);
}

.github-note {
  margin-top: 15px;
  color: #8b4513;
  font-style: italic;
  font-size: 0.95rem;
}

.testimonials-preview {
  margin-top: 50px;
  padding: 30px;
  background: rgba(139, 69, 19, 0.05);
  border-radius: 8px;
  border: 1px dashed #8b4513;
}

.coming-soon {
  color: #8b4513;
  font-style: italic;
  font-size: 1rem;
  margin: 0;
}

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

@media (max-width: 768px) {
  :root {
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --nav-height: auto;
  }
  
  body {
    font-size: 1rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .site-header h1 {
    font-size: 2.2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.2rem;
  }
  
  .site-header,
  .content {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .toc li {
    padding-left: 2rem;
  }
  
  /* Sticky nav για tablets */
  .sticky-nav-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }
  
  .sticky-nav-title {
    max-width: 100%;
    text-align: center;
  }
  
  .sticky-nav-buttons {
    justify-content: center;
    width: 100%;
  }
  
  .sticky-nav-buttons a {
    flex: 1;
    justify-content: center;
    min-width: 120px;
  }
  
  .nav-links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .nav-links a {
    width: 100%;
    justify-content: center;
  }
  
  /* Stats Section Responsive */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .stat-card {
    padding: 20px 15px;
  }

  .stat-icon {
    font-size: 2.5rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-label {
    font-size: 0.9rem;
  }

  .stats-section h2 {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 0.95rem;
  }
  
  .site-header h1 {
    font-size: 1.85rem;
  }
  
  .site-header .subtitle {
    font-size: 1rem;
  }
  
  h2 {
    font-size: 1.35rem;
  }
  
  /* Sticky nav για κινητά */
  .sticky-nav-inner {
    padding: 0.5rem var(--spacing-sm);
  }
  
  .sticky-nav-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .sticky-nav-buttons a {
    width: 100%;
    font-size: 0.8rem;
    padding: 0.6rem 0.8rem;
  }
  
  /* Stats για mobile */
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Print Styles - Enhanced
   ============================================ */

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  body {
    background: white !important;
    font-size: 12pt;
    line-height: 1.6;
    color: #000;
  }
  
  /* Hide navigation elements */
  .sticky-nav,
  .nav-links,
  .breadcrumbs,
  .newsletter-section,
  .stats-section {
    display: none !important;
  }
  
  /* Show URLs after links */
  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 90%;
    color: #555;
  }
  
  a[href^="#"]:after,
  a[href^="javascript:"]:after {
    content: "";
  }
  
  /* Headers */
  .site-header,
  .content {
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    margin: 0 !important;
    page-break-inside: avoid;
  }
  
  .site-header::before {
    display: none;
  }
  
  h1 {
    font-size: 24pt;
    margin-bottom: 12pt;
  }
  
  h2 {
    font-size: 18pt;
    margin-top: 18pt;
    margin-bottom: 12pt;
    page-break-after: avoid;
  }
  
  h2::after {
    display: none;
  }
  
  h3 {
    font-size: 14pt;
    margin-top: 14pt;
    margin-bottom: 8pt;
    page-break-after: avoid;
  }
  
  /* Paragraphs */
  p {
    orphans: 3;
    widows: 3;
    text-align: justify;
  }
  
  /* Footer */
  .site-footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    border-top: 1px solid #000;
    padding: 6pt 0;
    font-size: 9pt;
  }
  
  /* Table of contents */
  .toc {
    page-break-inside: avoid;
  }
  
  .toc li {
    page-break-inside: avoid;
  }
  
  /* Page breaks */
  blockquote,
  dl {
    page-break-inside: avoid;
  }
  
  /* Add page numbers */
  @page {
    margin: 2cm;
  }
  
  @page :first {
    margin-top: 3cm;
  }
}

/* ============================================
   Accessibility - Enhanced
   ============================================ */

/* Focus styles για πληκτρολόγιο */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--accent-gold);
  outline-offset: 3px;
  border-radius: 3px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --text-primary: #000;
    --text-secondary: #222;
    --accent-deep: #654321;
    --border-soft: #999;
  }
  
  a {
    text-decoration: underline;
  }
}

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

/* Screen reader only class */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ============================================
   Dark Mode Support
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    --primary-bg: #1a1612;
    --secondary-bg: #221e18;
    --text-primary: #e8dcc8;
    --text-secondary: #c4b5a0;
    --accent-gold: #d4a853;
    --accent-deep: #b8935e;
    --accent-light: #7b6346;
    --border-soft: #3a342a;
    --shadow-subtle: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.5);
  }
  
  .sticky-nav {
    background: rgba(26, 22, 18, 0.98);
    border-bottom-color: var(--border-soft);
  }
  
  .site-header {
    background: linear-gradient(135deg, rgba(34,30,24,0.9) 0%, rgba(34,30,24,0.6) 100%);
  }
  
  .content {
    background: rgba(34, 30, 24, 0.85);
  }
  
  dl {
    background: rgba(0, 0, 0, 0.2);
  }
  
  blockquote {
    background: rgba(212, 168, 83, 0.1);
  }
  
  .stat-card {
    background: linear-gradient(135deg, #3a342a 0%, #2a261e 100%);
  }
  
  .testimonials-preview {
    background: rgba(212, 168, 83, 0.08);
  }
}