/* ========================================
   CSS Variables - Light & Dark Themes
======================================== */
:root {
  /* Light Theme Colors */
  --primary-color: #2d7451;
  --secondary-color: #7c8d85;
  --forest-color: #2c4a3b;
  --cream-color: #f5f1e8;
  --background-color: #fdfdfb;
  --card-background: #f8f9fa;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border-color: rgba(124, 141, 133, 0.2);
  --shadow-color: rgba(30, 59, 44, 0.1);
  --shadow-hover: rgba(30, 59, 44, 0.15);
  --text-white: #ffffff;

  /* Typography */
  --font-heading: "Merriweather", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.7;
  --line-height-heading: 1.3;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-theme: 10rem;

  /* Layout */
  --container-max-width: 1200px;
  --content-max-width: 800px;
  --border-radius: 8px;
  --border-radius-lg: 50px;
  --transition: all 0.3s ease;
  --shadow: 0 2px 8px var(--shadow-color);
  --shadow-lg: 0 8px 25px var(--shadow-hover);
}

[data-theme="dark"] {
  /* Dark Theme Colors */
  --background-color: #1a1a1a;
  --card-background: #2a2a2a;
  --text-primary: #e5e5e5;
  --text-secondary: #b8b8b8;
  --text-muted: #888888;
  --border-color: rgba(229, 229, 229, 0.1);
  --shadow-color: rgba(0, 0, 0, 0.3);
  --shadow-hover: rgba(0, 0, 0, 0.4);
}

/* ========================================
   Reset & Base Styles
======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--background-color);
  transition: var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: var(--line-height-heading);
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
}
h2 {
  font-size: 2rem;
}
h3 {
  font-size: 1.5rem;
}
h4 {
  font-size: 1.25rem;
}
h5 {
  font-size: 1.125rem;
}
h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--forest-color);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius);
}

/* ========================================
   Dark Mode Toggle
======================================== */
.theme-toggle {
  position: fixed;
  top: var(--space-lg);
  left: var(--space-lg);
  z-index: 1000;
  background: var(--card-background);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: var(--space-xs);
  box-shadow: var(--shadow);
  transition: var(--transition);
  opacity: 0.2;
}

.theme-toggle:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  opacity: 1;
}

.toggle-switch {
  position: relative;
  width: 50px;
  height: 25px;
  background: var(--secondary-color);
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
}

.toggle-switch::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 21px;
  height: 21px;
  background: var(--cream-color);
  border-radius: 50%;
  transition: var(--transition);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .toggle-switch {
  background: var(--primary-color);
}

[data-theme="dark"] .toggle-switch::before {
  transform: translateX(25px);
  background: var(--text-primary);
}

.toggle-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  transition: var(--transition);
}

.sun-icon {
  left: 7px;
  opacity: 1;
}

.moon-icon {
  right: 7px;
  opacity: 0.5;
}

[data-theme="dark"] .sun-icon {
  opacity: 0.5;
}

[data-theme="dark"] .moon-icon {
  opacity: 1;
}

/* ========================================
   Layout Components
======================================== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.main-content {
  min-height: calc(100vh - 200px);
  padding-top: var(--space-xl);
}

/* ========================================
   Header & Navigation
======================================== */
.site-header {
  background: var(--card-background);
  backdrop-filter: blur(10px);
  border-bottom: 0.5px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition);
}

.site-nav {
  padding: var(--space-md) 0;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand .site-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.logo-icon {
  font-size: 2rem;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--forest-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.nav-toggle:hover {
  background: var(--border-color);
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: var(--transition);
  border-radius: 2px;
}

.nav-menu {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  font-weight: 500;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
  color: var(--text-secondary);
}

.nav-link:hover,
.nav-link.active {
  background: var(--border-color);
  color: var(--primary-color);
  transform: translateY(-1px);
}

/* ========================================
   Hero Section
======================================== */
.hero {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--forest-color) 100%
  );
  color: var(--cream-color);
  padding: var(--space-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.05)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.03)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: var(--space-md);
  color: var(--cream-color);
  font-weight: 700;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--space-xl);
  opacity: 0.9;
  line-height: 1.6;
  color: var(--text-white);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--cream-color);
  color: var(--primary-color);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  font-size: 1.1rem;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  color: var(--primary-color);
}

/* ========================================
   Section Styles
======================================== */
.latest-posts,
.categories-section {
  padding: var(--space-2xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
  font-size: 2.5rem;
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -var(--space-sm);
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 2px;
}

.section-footer {
  text-align: center;
  margin-top: var(--space-xl);
}

.view-all-link,
.view-more-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--primary-color);
  font-weight: 600;
  padding: var(--space-sm) var(--space-lg);
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius-lg);
  transition: var(--transition);
}

.view-all-link:hover,
.view-more-link:hover {
  background: var(--primary-color);
  color: var(--cream-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ========================================
   Post Cards
======================================== */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.post-card {
  background: var(--card-background);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--border-color);
  position: relative;
}

.post-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.post-card.featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-height: 400px;
}

.post-card-image {
  position: relative;
  overflow: hidden;
}

.post-card-image img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: var(--transition);
  border-radius: 0;
}

.post-card.featured .post-card-image img {
  height: 100%;
}

.post-card:hover .post-card-image img {
  transform: scale(1.05);
}

.post-card-content {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.post-card-title {
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.post-card-title a {
  color: var(--text-primary);
  font-weight: 600;
  transition: var(--transition);
}

.post-card-title a:hover {
  color: var(--primary-color);
}

.post-card-excerpt {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
  flex-grow: 1;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  padding-top: var(--space-md);
  border-top: 0.5px solid var(--border-color);
}

.post-card-category {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--forest-color)
  );
  color: var(--cream-color);
  padding: 4px var(--space-sm);
  border-radius: var(--border-radius);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.reading-time {
  display: flex;
  align-items: center;
  gap: 4px;
}

.reading-time::before {
  content: "📖";
  font-size: 0.8rem;
}

.author-info {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.author-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--secondary-color),
    var(--primary-color)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cream-color);
  font-size: 0.6rem;
  font-weight: 600;
}

/* ========================================
   Categories Grid
======================================== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.category-card {
  background: var(--card-background);
  padding: var(--space-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--forest-color));
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.category-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--forest-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.category-card h3 {
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.category-card p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.category-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 600;
  color: var(--primary-color);
  padding: var(--space-sm) var(--space-lg);
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius-lg);
  transition: var(--transition);
}

.category-link:hover {
  background: var(--primary-color);
  color: var(--cream-color);
  transform: translateY(-2px);
}

/* ========================================
   Post Content
======================================== */
.post-header {
  background: var(--card-background);
  padding: var(--space-2xl) 0;
  border-bottom: 0.5px solid var(--border-color);
}

.post-image {
  margin-bottom: var(--space-xl);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.post-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.post-title {
  max-width: var(--content-max-width);
  margin: 0 auto var(--space-lg);
  text-align: center;
  font-size: 3rem;
  line-height: 1.2;
}

.post-meta {
  max-width: var(--content-max-width);
  margin: 0 auto;
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 1rem;
  align-items: center;
}

.post-categories {
  display: flex;
  gap: var(--space-sm);
}

.post-content {
  max-width: var(--content-max-width);
  margin: var(--space-2xl) auto;
  padding: 0 var(--space-md);
}

.post-content h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-lg);
  position: relative;
  padding-left: var(--space-md);
}

.post-content h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--forest-color)
  );
  border-radius: 2px;
}

.post-content h3 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--primary-color);
}

.post-content blockquote {
  border-left: 4px solid var(--secondary-color);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
  font-style: italic;
  color: var(--text-secondary);
  background: var(--border-color);
  border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
  position: relative;
}

.post-content blockquote::before {
  content: '"';
  font-size: 4rem;
  color: var(--secondary-color);
  position: absolute;
  top: -10px;
  left: var(--space-md);
  font-family: serif;
}

.post-content ul,
.post-content ol {
  margin: var(--space-lg) 0;
  padding-left: var(--space-xl);
}

.post-content li {
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}

.post-footer {
  border-top: 0.5px solid var(--border-color);
  padding-top: var(--space-lg);
  margin-top: var(--space-2xl);
}

.post-tags {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  align-items: center;
}

.tags-label {
  font-weight: 600;
  color: var(--text-secondary);
}

.tag-link {
  background: var(--border-color);
  padding: 6px var(--space-sm);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: var(--transition);
}

.tag-link:hover {
  background: var(--primary-color);
  color: var(--cream-color);
  transform: translateY(-1px);
}

/* ========================================
   Footer
======================================== */
.site-footer {
  background: var(--card-background);
  border-top: 0.5px solid var(--border-color);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: var(--space-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-xl);
}

.footer-section h3,
.footer-section h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.footer-section p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary-color);
  padding-left: var(--space-xs);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 40px;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.social-link:hover {
  background: var(--primary-color);
  color: var(--cream-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 0.5px solid var(--border-color);
  padding-top: var(--space-lg);
  text-align: center;
  color: var(--text-muted);
}

.disclaimer {
  margin-top: var(--space-md);
  font-size: 0.9rem;
}

/* ========================================
   Loading Animation
======================================== */
.loading-skeleton {
  background: linear-gradient(
    90deg,
    var(--border-color) 25%,
    transparent 50%,
    var(--border-color) 75%
  );
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ========================================
   Floating Action Button
======================================== */
.floating-actions {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  z-index: 1000;
}

.fab {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-color);
  color: var(--cream-color);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.fab.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.fab:hover {
  background: var(--forest-color);
  transform: translateY(-3px) scale(1.1);
}

/* ========================================
   Responsive Design
======================================== */
@media (max-width: 768px) {
  :root {
    --font-size-base: 15px;
    --space-xl: 2rem;
    --space-2xl: 2.5rem;
  }

  .theme-toggle {
    top: var(--space-md);
    left: var(--space-md);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--card-background);
    flex-direction: column;
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    border-top: 0.5px solid var(--border-color);
  }

  .nav-menu.active {
    display: flex;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .post-title {
    font-size: 2.2rem;
  }

  .posts-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .post-card.featured {
    grid-template-columns: 1fr;
  }

  .categories-grid {
    grid-template-columns: 1fr;
  }

  .post-meta {
    justify-content: flex-start;
    gap: var(--space-md);
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .social-links {
    justify-content: center;
  }

  .floating-actions {
    bottom: var(--space-md);
    right: var(--space-md);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .hero {
    padding: var(--space-xl) 0;
  }

  .hero-title {
    font-size: 2rem;
  }

  .latest-posts,
  .categories-section {
    padding: var(--space-xl) 0;
  }

  .post-content {
    padding: 0;
  }

  .post-card-content {
    padding: var(--space-lg);
  }

  .category-card {
    padding: var(--space-lg);
  }
}

/* ========================================
   Print Styles
======================================== */
@media print {
  .theme-toggle,
  .floating-actions,
  .nav-toggle {
    display: none !important;
  }

  body {
    background: white !important;
    color: black !important;
  }

  .post-card,
  .category-card {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
  }
}

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

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

/* Focus styles */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

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