/* ============================================
   Modern Tech Blog Styles
   ============================================ */

/* CSS Variables for easy theming */
:root {
  /* Modern Purple to Blue Gradient Theme */
  --primary-color: #4f7cc4;
  --primary-dark: #3a5fa0;
  --secondary-color: #8b7cb4;
  --accent-color: #5d8ec9;
  --gradient-start: #a99ec4;
  --gradient-mid: #7c96c0;
  --gradient-end: #4f7cc4;
  
  /* Text Colors */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-accent: #f0f4fb;
  --border-color: #e5e7eb;
  
  /* Shadows with subtle purple-blue tint */
  --shadow-sm: 0 1px 2px 0 rgba(79, 124, 196, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(79, 124, 196, 0.12), 0 2px 4px -1px rgba(79, 124, 196, 0.08);
  --shadow-lg: 0 10px 15px -3px rgba(79, 124, 196, 0.12), 0 4px 6px -2px rgba(79, 124, 196, 0.08);
  --shadow-xl: 0 20px 25px -5px rgba(79, 124, 196, 0.15), 0 10px 10px -5px rgba(79, 124, 196, 0.08);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  
  /* Transition */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Typography Improvements */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
}

/* ============================================
   Mermaid Diagram Styling
   ============================================ */
.mermaid {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin: 32px 0;
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

.mermaid svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* Responsive diagram sizing */
@media (max-width: 768px) {
  .mermaid {
    padding: 16px;
    margin: 24px -16px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
}

/* Improve diagram text readability */
.mermaid text {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif !important;
  font-size: 14px !important;
}

/* Pre tags containing mermaid code (backup styling) */
pre.mermaid {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  overflow-x: auto;
}


/* ============================================
   Hero Section
   ============================================ */
.hero-section {
  position: relative;
  background: linear-gradient(180deg, #a99ec4 0%, #8b9dc3 35%, #6fa4c8 70%, #4f7cc4 100%);
  padding: 80px 20px 100px;
  margin: -20px -20px 60px -20px;
  overflow: hidden;
  color: white;
  box-shadow: 0 4px 20px rgba(79, 124, 196, 0.15);
}

@media (min-width: 768px) {
  .hero-section {
    padding: 120px 40px 140px;
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 24px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  animation: fadeInUp 0.6s ease-out;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.hero-icon {
  width: 20px;
  height: 20px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  margin: 0 0 20px 0;
  line-height: 1.2;
  animation: fadeInUp 0.6s ease-out 0.1s backwards;
  letter-spacing: -0.02em;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.6;
  margin: 0 0 16px 0;
  opacity: 0.95;
  animation: fadeInUp 0.6s ease-out 0.2s backwards;
  font-weight: 400;
}

@media (max-width: 768px) {
  .hero-subtitle {
    font-size: 1.1rem;
  }
}

.hero-author {
  font-size: 1rem;
  margin: 0 0 32px 0;
  opacity: 0.9;
  animation: fadeInUp 0.6s ease-out 0.3s backwards;
}

.hero-social {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.4s backwards;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-lg);
  color: white !important;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.social-link:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
}

/* Floating decorative elements */
.hero-decoration {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: 1;
}

.floating-element {
  position: absolute;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  animation: float 20s infinite ease-in-out;
  backdrop-filter: blur(2px);
}

.element-1 {
  width: 300px;
  height: 300px;
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.element-2 {
  width: 200px;
  height: 200px;
  bottom: -50px;
  left: -50px;
  animation-delay: -7s;
}

.element-3 {
  width: 150px;
  height: 150px;
  top: 50%;
  left: 10%;
  animation-delay: -14s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -30px) rotate(120deg);
  }
  66% {
    transform: translate(-20px, 20px) rotate(240deg);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Featured Posts Section
   ============================================ */
.featured-posts {
  max-width: 1200px;
  margin: 0 auto 80px;
  padding: 0 20px;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0 0 12px 0;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin: 0;
  font-weight: 400;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
  margin-bottom: 48px;
}

@media (max-width: 768px) {
  .post-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.post-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.post-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.post-card:hover::before {
  transform: scaleX(1);
}

.post-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.post-date {
  font-size: 0.875rem;
  color: var(--text-light);
  font-weight: 500;
}

.post-category {
  font-size: 0.75rem;
  padding: 4px 12px;
  background: var(--bg-accent);
  color: var(--primary-color);
  border-radius: 50px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-card-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 16px 0;
  line-height: 1.3;
}

.post-card-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.post-card-excerpt {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 20px 0;
  flex-grow: 1;
}

.post-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  gap: 12px;
  flex-wrap: wrap;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: var(--transition);
}

.read-more:hover {
  color: var(--primary-dark);
  gap: 10px;
}

.arrow-icon {
  transition: transform 0.2s ease;
}

.read-more:hover .arrow-icon {
  transform: translateX(4px);
}

.post-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: 4px;
  font-weight: 500;
}

.view-all-container {
  text-align: center;
}

.view-all-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--gradient-mid) 0%, var(--gradient-end) 100%);
  color: white !important;
  text-decoration: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(79, 124, 196, 0.3);
  border: none;
}

.view-all-link:hover {
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-mid) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79, 124, 196, 0.4);
}

.no-posts {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.125rem;
  padding: 60px 20px;
}

/* ============================================
   About Section
   ============================================ */
.about-section {
  background: var(--bg-secondary);
  padding: 60px 20px;
  margin: 0 -20px -20px -20px;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-title {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 20px 0;
  color: var(--text-primary);
}

.about-text {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0 0 32px 0;
}

.about-topics {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.topic-tag {
  padding: 10px 20px;
  background: white;
  color: var(--text-primary);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.topic-tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* ============================================
   Post Navigation (preserved from original)
   ============================================ */
hr {
  margin-top: 30px;
  margin-bottom: 20px;
  border: none;
  border-top: 2px solid var(--border-color);
}

.post_navi {
  display: flex;
  gap: 20px;
  margin-top: 40px;
}

@media (max-width: 768px) {
  .post_navi {
    flex-direction: column;
  }
}

.post_navi-label {
  font-size: 0.8em;
  opacity: 0.5;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.post_navi .post_navi-item {
  padding: 20px 24px;
  width: 50%;
  position: relative;
  color: inherit !important;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  text-decoration: none;
  display: block;
}

@media (max-width: 768px) {
  .post_navi .post_navi-item {
    width: 100%;
  }
}

.post_navi .post_navi-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.post_navi .nav_prev {
  text-align: left;
  padding-left: 50px;
}

.post_navi .nav_next {
  text-align: right;
  padding-right: 50px;
}

.post_navi .nav_prev .post_navi-arrow {
  left: 20px;
}

.post_navi .nav_next .post_navi-arrow {
  right: 20px;
}

.post_navi .post_navi-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.5em;
  opacity: 0.3;
  color: var(--primary-color);
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
  .section-title {
    font-size: 2rem;
  }
  
  .section-subtitle {
    font-size: 1rem;
  }
  
  .post-card {
    padding: 20px;
  }
  
  .post-card-title {
    font-size: 1.25rem;
  }
  
  .about-section {
    padding: 40px 20px;
  }
  
  .about-title {
    font-size: 1.5rem;
  }
  
  .about-text {
    font-size: 1rem;
  }
}

/* ============================================
   Enhanced Site Header (Minima theme override)
   ============================================ */
.site-header {
  border-top: 5px solid transparent;
  border-image: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end)) 1;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
  box-shadow: var(--shadow-sm);
}

.site-title {
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}

.site-nav .page-link {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.2s ease;
}

.site-nav .page-link:hover {
  color: var(--primary-color);
}

/* ============================================
   Share Links Improvements
   ============================================ */
.share-links {
  display: flex;
  gap: 12px;
  margin: 20px 0;
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.share-links a {
  transition: var(--transition);
}

.share-links a:hover {
  transform: translateY(-2px);
}