/* ============================================
   LearnWithTales - Premium Design System
   ============================================ */

/* CSS Variables - Color Palette */
:root {
  /* Primary Colors */
  --color-teal: #2d5a5a;
  --color-teal-light: #3d7a7a;
  --color-teal-dark: #1d3a3a;
  
  --color-amber: #d4a574;
  --color-amber-light: #e8c49a;
  --color-amber-dark: #b8864a;
  
  --color-coral: #e67e7e;
  --color-coral-light: #f5a5a5;
  --color-coral-dark: #d45a5a;
  
  /* Neutrals */
  --color-bg: #fafbfc;
  --color-bg-paper: #ffffff;
  --color-text: #2c3e50;
  --color-text-light: #5a6c7d;
  --color-text-muted: #8a9ba8;
  --color-border: #e1e8ed;
  --color-border-light: #f0f4f7;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Georgia", "Times New Roman", serif;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Max Width */
  --max-width-content: 70ch;
  --max-width-page: 1200px;
}

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

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('/assets/img/paper-grid-pattern.svg');
  background-size: 200px 200px;
  background-position: 0 0;
  opacity: 0.03;
  pointer-events: none;
  z-index: -1;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-teal-dark);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

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

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

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

a:focus-visible {
  outline: 3px solid var(--color-amber);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

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

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

.container {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ============================================
   Header & Navigation
   ============================================ */

header {
  background-color: var(--color-bg-paper);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-text {
  height: 24px;
  width: auto;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-teal);
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav-toggle:focus-visible {
  outline: 3px solid var(--color-amber);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
  flex-wrap: wrap;
}

nav li {
  margin: 0;
}

nav a {
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-amber);
  transition: width 0.3s ease;
}

nav a:hover::after,
nav a[aria-current="page"]::after {
  width: 100%;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg-paper);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
  }
  
  nav.open {
    display: block;
  }
  
  nav ul {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

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

footer {
  background-color: var(--color-teal-dark);
  color: #ffffff;
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-2xl);
}

.footer-content {
  max-width: var(--max-width-page);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.footer-section h3 {
  color: var(--color-amber-light);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
}

.footer-section ul {
  list-style: none;
  margin: 0;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
}

.footer-section a:hover {
  color: var(--color-amber-light);
}

.footer-bottom {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

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

.breadcrumbs {
  margin-bottom: var(--spacing-lg);
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.breadcrumbs a {
  color: var(--color-text-light);
}

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

.breadcrumbs span {
  margin: 0 var(--spacing-xs);
  color: var(--color-text-muted);
}

/* ============================================
   Cards & Callouts
   ============================================ */

.card {
  background-color: var(--color-bg-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-lg);
  transition: box-shadow 0.3s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.callout {
  background-color: var(--color-bg-paper);
  border-left: 4px solid var(--color-teal);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-sm);
}

.callout-title {
  font-weight: 600;
  color: var(--color-teal);
  margin-bottom: var(--spacing-xs);
  font-size: 1.1rem;
}

.callout.amber {
  border-left-color: var(--color-amber);
}

.callout.amber .callout-title {
  color: var(--color-amber-dark);
}

.callout.coral {
  border-left-color: var(--color-coral);
}

.callout.coral .callout-title {
  color: var(--color-coral-dark);
}

/* ============================================
   Badges & Tags
   ============================================ */

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--color-teal);
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  margin-right: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
}

.badge.amber {
  background-color: var(--color-amber);
}

.badge.coral {
  background-color: var(--color-coral);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-teal);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
  text-align: center;
}

.btn:hover {
  background-color: var(--color-teal-light);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:focus-visible {
  outline: 3px solid var(--color-amber);
  outline-offset: 2px;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-teal);
  border: 2px solid var(--color-teal);
}

.btn-secondary:hover {
  background-color: var(--color-teal);
  color: #ffffff;
}

/* ============================================
   Forms
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  max-width: 500px;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px rgba(45, 90, 90, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

/* ============================================
   Lists & Checklists
   ============================================ */

.checklist {
  list-style: none;
  margin-left: 0;
}

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

.checklist li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-teal);
  font-weight: bold;
  font-size: 1.2rem;
}

/* ============================================
   Article & Story Styles
   ============================================ */

.article-meta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-light);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.story-header {
  margin-bottom: var(--spacing-xl);
}

.story-header h1 {
  margin-bottom: var(--spacing-md);
}

.story-info {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-light);
  font-size: 0.9rem;
}

/* ============================================
   Grid Layouts
   ============================================ */

.grid {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

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

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

.text-muted {
  color: var(--color-text-muted);
}

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

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

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

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

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

@media print {
  body {
    background: #ffffff;
  }
  
  header,
  footer,
  .breadcrumbs,
  nav {
    display: none;
  }
  
  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
  
  a {
    color: #000;
    text-decoration: underline;
  }
}

/* ============================================
   Responsive Adjustments
   ============================================ */

@media (max-width: 768px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
  }
  
  main {
    padding: var(--spacing-lg) 0;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  h1 {
    font-size: 1.75rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}