/* Import premium typography from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;0,8..60,700;1,8..60,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* Core Theme Variables */
:root {
  /* Light Theme - Cream & Amber */
  --bg-color: #faf7f2;
  --card-bg: #ffffff;
  --text-primary: #1e1915;
  --fg: var(--text-primary);
  --fg-heading: #0f172a;
  --eb-fg-muted: #8b7355;
  --eb-border: var(--border-color);
  --text-secondary: #6e5e52;
  --text-muted: #9c897a;
  --border-color: #ebdccb;
  --border-focus: #d97706;
  --accent-color: #d97706;
  --accent-hover: #b45309;
  --accent-light: #fef3c7;
  --accent-fg: #ffffff;
  --grid-line: rgba(235, 220, 203, 0.45);
  
  --shadow-sm: 0 2px 4px rgba(30, 25, 21, 0.03);
  --shadow-md: 0 4px 20px rgba(30, 25, 21, 0.05);
  --shadow-lg: 0 10px 30px rgba(30, 25, 21, 0.08);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Source Serif 4', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --bg-color: #0f0e0c;
  --card-bg: #181512;
  --text-primary: #f5eedf;
  --fg: var(--text-primary);
  --fg-heading: #f8fafc;
  --eb-fg-muted: #8c7d6e;
  --eb-border: var(--border-color);
  --text-secondary: #bdae9f;
  --text-muted: #8c7d6e;
  --border-color: #2d2720;
  --border-focus: #f59e0b;
  --accent-color: #f59e0b;
  --accent-hover: #d97706;
  --accent-light: #2d2212;
  --accent-fg: #0f0e0c;
  --grid-line: rgba(45, 39, 32, 0.4);
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Reset and Core Layout */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--text-muted) var(--bg-color);
}

/* Custom Scrollbar for Webkit Browsers */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 999px;
  border: 2px solid var(--bg-color);
  transition: background 0.15s ease;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  opacity: 0.9;
}

/* Background blueprint grid separated to prevent transition flashes */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
  background-image: 
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(circle at 50% 25%, rgba(0,0,0,1) 20%, rgba(0,0,0,0) 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 25%, rgba(0,0,0,1) 20%, rgba(0,0,0,0) 80%);
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header & Navigation Bar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(250, 247, 242, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-smooth);
  box-shadow: 
    0 1px 2px rgba(0, 0, 0, 0.01),
    0 4px 16px rgba(139, 115, 85, 0.04);
}

[data-theme="dark"] .navbar {
  background-color: rgba(15, 14, 12, 0.8);
  box-shadow: 
    0 1px 2px rgba(0, 0, 0, 0.1),
    0 4px 16px rgba(0, 0, 0, 0.25);
}

.navbar .nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
  padding: 0 2rem;
}

.logo {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.01em;
}

.logo span {
  color: var(--accent-color);
  font-weight: 400;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-item {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  padding: 0.5rem 0;
  transition: var(--transition-fast);
}

.nav-item:hover, .nav-item.active {
  color: var(--accent-color);
}

/* Underline active state for nav link */
.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-color);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

.nav-item:hover::after, .nav-item.active::after {
  transform: scaleX(1);
  transform-origin: left;
}


.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme Toggle Button */
.theme-toggle {
  background: transparent;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition-smooth);
  padding: 0;
}

.theme-toggle:hover {
  background-color: rgba(139, 115, 85, 0.08);
  color: var(--accent-color);
}

[data-theme="dark"] .theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.theme-toggle:hover svg {
  transform: rotate(45deg) scale(1.12);
}

.theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: none;
}

/* Buttons */
.btn {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-smooth);
}

.btn-primary {
  background-color: var(--accent-color);
  color: var(--accent-fg);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.2);
}

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--card-bg);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Hero Section */
.hero {
  padding: 5rem 0 2rem 0;
  border-bottom: 1px solid var(--border-color);
  position: relative;
}

.hero-tagline {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hero-tagline::before {
  content: '';
  display: inline-block;
  width: 30px;
  height: 1px;
  background-color: var(--text-muted);
}

.hero h1 {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--fg-heading);
}

.hero h1 span {
  font-style: italic;
  color: var(--accent-color);
}

.hero-desc {
  margin: 20px 0 0;
  font-family: var(--font-sans);
  font-size: 19px;
  line-height: 1.6;
  color: var(--eb-fg-muted);
  max-width: 720px;
  font-weight: 400;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--text-muted);
}

.hero-stats span {
  display: inline-flex;
  align-items: center;
}

.hero-stats span:not(:last-child)::after {
  content: '•';
  margin-left: 1.5rem;
  color: var(--border-color);
}

/* Toolbar: Search & Filters */
.toolbar {
  padding: 2rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.search-box {
  position: relative;
  flex: 1;
  max-width: 400px;
  min-width: 250px;
}

.search-input {
  width: 100%;
  padding: 0.8rem 1rem 0.8rem 2.8rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--card-bg);
  color: var(--text-primary);
  transition: var(--transition-smooth);
}

.search-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
}

[data-theme="dark"] .search-input:focus {
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.25);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  display: flex;
  align-items: center;
}

.search-icon svg {
  width: 18px;
  height: 18px;
}

.search-shortcut {
  position: absolute;
  right: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: 4px;
  pointer-events: none;
}

.toolbar-controls {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* Filter Toggle Button styling */
.filter-toggle-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--eb-border);
  background-color: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition-fast);
  user-select: none;
  line-height: 1;
}

.filter-toggle-btn:hover, .filter-toggle-btn.active {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background-color: rgba(139, 115, 85, 0.05);
}

[data-theme="dark"] .filter-toggle-btn:hover, [data-theme="dark"] .filter-toggle-btn.active {
  background-color: rgba(255, 255, 255, 0.03);
}

.filter-toggle-icon {
  width: 15px;
  height: 15px;
  stroke: currentColor;
}

/* Expanded Filter Panel Layout */
.filter-panel {
  display: none;
  padding: 1.5rem 0;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  border-top: 1px dashed var(--border-color);
  border-bottom: 1px dashed var(--border-color);
}

.filter-panel.open {
  display: block;
  animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.filter-panel.open .filter-row {
  opacity: 0;
  transform: translateY(-8px);
  animation: filterRowEnter 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.filter-panel.open .filter-row:nth-of-type(1) {
  animation-delay: 0.04s;
}

.filter-panel.open .filter-row:nth-of-type(2) {
  animation-delay: 0.1s;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes filterRowEnter {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.filter-row {
  display: flex;
  margin-bottom: 1.1rem;
  align-items: flex-start;
}

.filter-row.sort-row {
  align-items: center;
  margin-bottom: 0;
}

.filter-label {
  width: 100px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
  padding-top: 0.45rem;
  user-select: none;
}

.filter-row.sort-row .filter-label {
  padding-top: 0;
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 0.5rem;
  flex: 1;
}

/* Filter Pill Buttons */
.filter-pill {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--eb-fg-muted);
  padding: 6px 10px;
  border: 1px solid var(--eb-border);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.filter-pill:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background-color: var(--accent-light);
}

.filter-pill span {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
}

.filter-pill.active {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background-color: var(--accent-light);
}

.filter-pill.active span {
  color: var(--accent-color);
  font-weight: 700;
}

[data-theme="dark"] .filter-pill.active span {
  color: var(--text-primary);
}

/* SORT controls dropdown and clear button */
.filter-sort-controls {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.select-wrapper {
  position: relative;
  display: inline-block;
}

#sort-select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.45rem 2.2rem 0.45rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--card-bg);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-fast);
}

#sort-select:focus {
  outline: none;
  border-color: var(--accent-color);
}

.select-wrapper::after {
  content: '';
  position: absolute;
  right: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 5px;
  background-color: var(--text-secondary);
  clip-path: polygon(100% 0, 0 0, 50% 100%);
  pointer-events: none;
}

.clear-all-btn {
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  cursor: pointer;
  text-transform: uppercase;
  transition: var(--transition-fast);
  padding: 0.2rem 0;
}

.clear-all-btn:hover {
  color: var(--accent-color);
}

.post-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-transform: lowercase;
  letter-spacing: 0.02em;
  font-weight: 500;
}

/* Layout Grid/List Switcher */
.layout-switch {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2px;
  background-color: transparent;
  gap: 2px;
}

.layout-btn {
  background: none;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.layout-btn:hover {
  color: var(--accent-color);
  background-color: rgba(139, 115, 85, 0.05);
}

.layout-btn.active {
  color: var(--accent-fg);
  background-color: var(--accent-color);
}

.layout-btn svg {
  width: 18px;
  height: 18px;
  transition: transform 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.layout-btn:hover svg {
  transform: scale(1.18);
}

/* Blog Section Area */
.blog-section {
  padding: 4rem 0;
}

/* Grid Layout */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem 2rem;
  transition: var(--transition-smooth);
}

/* Featured Card Override for first post in grid view */
@media (min-width: 769px) {
  .blog-card.featured-card {
    grid-column: span 2;
    flex-direction: row;
    height: 100%;
  }
  
  .blog-card.featured-card .card-image-wrap {
    width: 50%;
    aspect-ratio: unset;
    border-bottom: none;
    border-right: 1px solid var(--border-color);
  }
  
  .blog-card.featured-card .card-content {
    width: 50%;
    padding: 2.2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  
  .blog-card.featured-card .card-desc {
    -webkit-line-clamp: 4; /* Allow slightly longer description for featured post */
  }
}

.blog-grid.list-view {
  grid-template-columns: 1fr;
  max-width: 800px;
  margin: 0 auto;
}

/* Blog Card Styles */
.blog-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
  transition: var(--transition-smooth);
  position: relative;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-color);
}

.card-image-wrap {
  width: 100%;
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
}

.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.card-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.card-type {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent-color);
  padding: 4px 8px;
  border: 1px solid var(--eb-border);
  border-radius: 999px;
  background: transparent;
  display: inline-block;
  line-height: 1;
}

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

.card-title {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.75rem;
  color: var(--fg-heading);
  transition: var(--transition-fast);
}

.blog-card:hover .card-title {
  color: var(--accent-color);
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(235, 220, 203, 0.5);
  font-size: 0.8rem;
  color: var(--text-muted);
}

[data-theme="dark"] .card-footer {
  border-top: 1px solid rgba(45, 39, 32, 0.5);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-read-more {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--accent-color);
  transition: var(--transition-fast);
}

.blog-card:hover .card-read-more {
  transform: translateX(3px);
}

/* List View Layout Overrides */
.blog-grid.list-view .blog-card {
  flex-direction: row;
  height: auto;
  align-items: center;
}

@media (max-width: 768px) {
  .blog-grid.list-view .blog-card {
    flex-direction: column;
  }
}

.blog-grid.list-view .card-image-wrap {
  width: 35%;
  aspect-ratio: 16/11;
  border-bottom: none;
  border-right: 1px solid var(--border-color);
}

@media (max-width: 768px) {
  .blog-grid.list-view .card-image-wrap {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
}

.blog-grid.list-view .card-content {
  width: 65%;
  padding: 2rem;
}

@media (max-width: 768px) {
  .blog-grid.list-view .card-content {
    width: 100%;
    padding: 1.5rem;
  }
}

/* Empty/No Results View */
.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 5rem 2rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.no-results svg {
  width: 48px;
  height: 48px;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.no-results h3 {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.no-results p {
  color: var(--text-secondary);
}

/* Blog Article Reader View */
.reader-view {
  display: none; /* Controlled by JS class injection */
  padding: 3rem 0 6rem;
  width: 100%;
}

.reader-back-container {
  margin-bottom: 2rem;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.back-btn:hover {
  color: var(--accent-color);
  transform: translateX(-4px);
}

/* Two-column layout grid for article header */
.reader-header-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 3.5rem;
  align-items: start;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 3.5rem;
  margin-bottom: 3.5rem;
}

.reader-header-left {
  display: flex;
  flex-direction: column;
}

.reader-header-right {
  display: flex;
  justify-content: flex-end;
}

/* Breadcrumb style */
.reader-breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.reader-breadcrumb .slash {
  color: var(--accent-color);
  margin: 0 0.4rem;
}

/* Section Marker */
.reader-section-marker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.reader-title {
  margin: 4px 0 0;
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-weight: 800;
  font-size: clamp(40px, 4.6vw, 64px);
  line-height: 1.04;
  letter-spacing: -.025em;
  color: var(--fg-heading);
  text-wrap: balance;
  margin-bottom: 1.5rem;
}

/* Summary sentence */
.reader-summary {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* Meta table */
.reader-meta-table {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
  margin-top: 2rem;
}

.meta-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0 1.5rem;
}

.meta-col:not(:last-child) {
  border-right: 1px solid var(--border-color);
}

.meta-col:first-child {
  padding-left: 0;
}

.meta-col:last-child {
  padding-right: 0;
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.meta-value {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.meta-col:last-child .meta-value {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  color: var(--text-secondary);
}

.accent-text-orange {
  color: var(--accent-color);
  font-weight: 500;
}

/* Featured cover card on the right */
.reader-featured-card {
  width: 100%;
  max-width: 400px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.reader-image-wrap {
  width: 100%;
  aspect-ratio: 1/1; /* Square cover photo matches the mockup */
  overflow: hidden;
}

.reader-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.reader-featured-caption {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 1rem 1.2rem;
  border-top: 1px solid var(--border-color);
  background-color: rgba(0, 0, 0, 0.02);
  text-align: left;
}

[data-theme="dark"] .reader-featured-caption {
  background-color: rgba(255, 255, 255, 0.02);
}

/* Constrain article content to 760px for readability */
.reader-content {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 19px;
  line-height: 1.72;
  color: var(--fg);
  letter-spacing: -.003em;
  max-width: 760px;
  margin: 0 auto;
}

/* Responsive grid stacking */
@media (max-width: 992px) {
  .reader-header-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .reader-header-right {
    justify-content: center;
  }
  
  .reader-featured-card {
    max-width: 100%;
  }
}

@media (max-width: 600px) {
  .reader-meta-table {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem 0;
  }
  .meta-col {
    padding: 0.5rem 1rem;
  }
  .meta-col:nth-child(even) {
    border-right: none;
    padding-right: 0;
  }
  .meta-col:nth-child(odd) {
    border-right: 1px solid var(--border-color);
    padding-left: 0;
  }
}

.reader-content p {
  margin-bottom: 1.8rem;
}

.reader-content p.lead {
  font-size: 1.35rem;
  line-height: 1.6;
  color: var(--text-secondary);
  font-weight: 400;
  font-style: italic;
  border-left: 3px solid var(--accent-color);
  padding-left: 1.5rem;
  margin-bottom: 2.2rem;
}

.reader-content h2, .reader-content h3 {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  color: var(--fg-heading);
  margin-top: 3rem;
  margin-bottom: 1.2rem;
  line-height: 1.3;
}

.reader-content h2 {
  font-size: 2rem;
}

.reader-content h3 {
  font-size: 1.5rem;
}

.reader-content ul, .reader-content ol {
  margin-bottom: 1.8rem;
  padding-left: 2rem;
}

.reader-content li {
  margin-bottom: 0.6rem;
}

.reader-content blockquote {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 1.5rem;
  font-style: italic;
  color: var(--accent-color);
  border-left: 4px solid var(--accent-color);
  padding-left: 2rem;
  margin: 3rem 0;
  line-height: 1.5;
}

.reader-content pre {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 2.5rem 0;
}

.reader-content code {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  background-color: rgba(235, 220, 203, 0.3);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

[data-theme="dark"] .reader-content code {
  background-color: rgba(45, 39, 32, 0.4);
}

.reader-content pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  color: var(--text-primary);
}

/* Footer Section styling */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 5rem 0 3rem 0;
  margin-top: 5rem;
  background-color: var(--card-bg);
}

.newsletter-box {
  max-width: 600px;
  margin: 0 auto 4rem auto;
  text-align: center;
  padding: 3rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background-color: var(--bg-color);
  position: relative;
  overflow: hidden;
}

/* Subtle blueprint lines background for newsletter card */
.newsletter-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.5;
  pointer-events: none;
}

.newsletter-box * {
  position: relative;
  z-index: 1;
}

.newsletter-box h2 {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.newsletter-box p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
}

@media (max-width: 576px) {
  .newsletter-form {
    flex-direction: column;
  }
}

.newsletter-input {
  flex: 1;
  padding: 0.8rem 1.2rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--card-bg);
  color: var(--text-primary);
  transition: var(--transition-smooth);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--border-focus);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-color);
}

/* Animations and Transitions utility classes */
.fade-in {
  animation: pageEnter 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

/* Grid layout responsiveness rules */
@media (max-width: 992px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero h1 {
    font-size: 3.2rem;
  }
}

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 2.5rem;
  }
  .navbar .nav-links {
    gap: 1.5rem;
  }
  .hero {
    padding: 3.5rem 0 2rem 0;
  }
}

/* --- Premium Animation Suite --- */

/* Page Load / Entrance Animations */
.animate-slide-down {
  opacity: 0;
  transform: translateY(-20px);
  animation: slideDownFade 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Staggered entrance delays */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

@keyframes slideDownFade {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Scroll Reveal Animation Framework */
.reveal-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform, opacity;
}

.reveal-item.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Dynamic Navbar Shrink Scroll Animation */
.navbar.scrolled {
  height: 60px;
  background-color: rgba(250, 247, 242, 0.95);
  box-shadow: 
    0 1px 3px rgba(0, 0, 0, 0.02),
    0 8px 24px rgba(139, 115, 85, 0.08),
    0 16px 40px rgba(139, 115, 85, 0.04);
}

[data-theme="dark"] .navbar.scrolled {
  background-color: rgba(15, 14, 12, 0.95);
  box-shadow: 
    0 1px 3px rgba(0, 0, 0, 0.2),
    0 8px 24px rgba(0, 0, 0, 0.35),
    0 16px 40px rgba(0, 0, 0, 0.2);
}

.navbar.scrolled .nav-container {
  height: 60px;
}

/* --- High-Fidelity List Layout --- */

.blog-grid.list-view {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border-color);
  margin-top: 1rem;
}

/* Year section heading */
.list-year-section {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 4rem 0 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.list-year-info {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
}

.list-year-title {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 4rem;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin: 0;
}

.list-year-stats {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Individual list rows */
.list-post-row {
  display: flex;
  align-items: center;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border-color);
  text-decoration: none;
  color: inherit;
  transition: background-color 0.2s ease, padding 0.2s ease;
  margin: 0 -2rem; /* bleed out to container edges */
  padding-left: 2rem;
  padding-right: 2rem;
}

.list-post-row:hover {
  background-color: rgba(139, 115, 85, 0.05); /* very soft neutral warm tint */
}

[data-theme="dark"] .list-post-row:hover {
  background-color: rgba(255, 255, 255, 0.03); /* subtle white sheen in dark mode */
}

.list-post-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  width: 70px;
  flex-shrink: 0;
}

.list-post-date {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  width: 90px;
  flex-shrink: 0;
}

.list-day {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
}

.list-month {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.list-post-details {
  flex: 1;
  padding-right: 3rem;
}

.list-post-title {
  font-family: var(--font-serif, "Source Serif 4"), Georgia, serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--fg-heading);
  line-height: 1.25;
  margin-bottom: 0.4rem;
  transition: color 0.15s ease;
}

.list-post-row:hover .list-post-title {
  color: var(--accent-color);
}

.list-post-summary {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
}

.list-post-type {
  width: 120px;
  text-align: right;
  flex-shrink: 0;
  padding-right: 2rem;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.list-post-type .type-pill {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--eb-fg-muted);
  padding: 6px 10px;
  border: 1px solid var(--eb-border);
  border-radius: 999px;
  background: transparent;
  display: inline-block;
  line-height: 1;
}

.list-post-arrow {
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: transform 0.2s ease, color 0.2s ease;
  flex-shrink: 0;
}

.list-post-row:hover .list-post-arrow {
  transform: translateX(4px);
  color: var(--accent-color);
}

/* Responsive list adjustments */
@media (max-width: 768px) {
  .list-post-row {
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1.5rem 1rem;
    margin: 0 -1rem;
  }
  
  .list-post-details {
    width: 100%;
    order: 3;
    padding-right: 0;
    margin-top: 0.5rem;
  }
  
  .list-post-type {
    order: 2;
    width: auto;
    flex-grow: 1;
  }
  
  .list-post-arrow {
    order: 4;
    display: none; /* hide arrow on small viewport */
  }
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent-color);
  width: 0%;
  z-index: 101;
  transition: width 0.1s ease-out;
}

/* Mobile-Responsive Optimizations (max-width: 600px) */
@media (max-width: 600px) {
  /* Container Padding Adjustments */
  .container {
    padding: 0 1.25rem;
  }
  .navbar .nav-container {
    padding: 0 1.25rem;
  }
  
  /* Hero Section Typography */
  .hero h1 {
    font-size: 2.2rem;
    line-height: 1.15;
    letter-spacing: -0.02em;
  }
  .hero-tagline {
    font-size: 9px;
    letter-spacing: 0.06em;
  }
  .hero-desc {
    font-size: 17px;
    line-height: 1.55;
    margin-top: 15px;
  }
  
  /* Toolbar stack configuration */
  .toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 1.5rem 0;
  }
  .search-box {
    max-width: 100%;
  }
  .toolbar-controls {
    justify-content: space-between;
    width: 100%;
    gap: 0.5rem;
  }
  
  /* Year list header wrap spacing */
  .list-year-section {
    padding: 2.5rem 0 1rem;
    align-items: baseline;
  }
  .list-year-title {
    font-size: 3rem;
  }
  .list-post-row {
    margin: 0 -1.25rem;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
}

/* Latest Research Section Highlight */
.latest-research-section {
  margin-top: 1rem;
  margin-bottom: 2.5rem;
}

.latest-research-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-color);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.latest-research-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.doi-pill {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent-color);
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}

/* Comments Section Container */
.comments-section {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border-color);
}

.comments-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.comments-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.comments-badge {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem5;
  border-radius: 999px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--accent-color);
}

/* Comment Form Card */
.comment-form-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 2.5rem;
  box-shadow: 0 4px 20px var(--shadow-color);
  transition: var(--transition-smooth);
}

.comment-form-card:focus-within {
  border-color: var(--border-focus);
}

.comment-form-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.form-input, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-color);
  color: var(--text-primary);
  transition: var(--transition-smooth);
}

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
}

[data-theme="dark"] .form-input:focus, [data-theme="dark"] .form-textarea:focus {
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.25);
}

.submit-comment-btn {
  align-self: flex-end;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: #ffffff;
  background-color: var(--accent-color);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.submit-comment-btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
}

/* Comments List & Comment Cards */
.comments-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.comment-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  transition: var(--transition-smooth);
}

.comment-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.comment-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-color), #f59e0b);
  color: #ffffff;
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.comment-body {
  flex: 1;
}

.comment-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.comment-author-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.comment-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.comment-content-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.no-comments-notice {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-style: italic;
}