/**
 * Arina Blog Theme - Main Stylesheet
 * A modern, responsive WordPress blog theme with no external dependencies
 * Version: 1.0.0
 */

/* ===========================
   CSS CUSTOM PROPERTIES (Variables)
   =========================== */

:root {
  /* Primary Colors */
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;

  /* Accent Color */
  --accent: #f59e0b;

  /* Text Colors */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;

  /* Border Color */
  --border: #e2e8f0;

  /* Spacing Scale */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial,
    sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-mono: "Courier New", Courier, monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Z-index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1010;
  --z-fixed: 1020;
  --z-modal: 1030;
}

/* Dark mode variant (can be applied via WordPress Customizer) */
:root.dark-mode {
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --border: #475569;
}

/* ===========================
   RESET & NORMALIZE
   =========================== */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-base),
    color var(--transition-base);
}

/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

/* Paragraphs */
p {
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

/* Links */
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Lists */
ul,
ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-2xl);
}

li {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

/* Blockquotes */
blockquote {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 4px solid var(--primary);
  background-color: var(--bg-secondary);
  font-style: italic;
  color: var(--text-secondary);
}

blockquote p {
  margin-bottom: 0;
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--bg-tertiary);
  color: var(--primary-dark);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

pre {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  overflow-x: auto;
  margin-bottom: var(--spacing-lg);
}

pre code {
  background-color: transparent;
  color: var(--text-primary);
  padding: 0;
  font-size: var(--font-size-sm);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-sm);
}

thead {
  background-color: var(--bg-secondary);
}

th,
td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-weight: 600;
  color: var(--text-primary);
}

tr:hover {
  background-color: var(--bg-tertiary);
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Forms */
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
  resize: vertical;
}

/* Buttons */
button,
.button,
[role="button"] {
  font-family: inherit;
  font-size: inherit;
  font-weight: 600;
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-block;
  text-align: center;
  text-decoration: none;
}

.button-primary {
  background-color: var(--primary);
  color: white;
}

.button-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: var(--shadow-md);
}

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

.button-secondary:hover {
  background-color: var(--bg-tertiary);
}

.button-accent {
  background-color: var(--accent);
  color: white;
}

.button-accent:hover {
  background-color: #d97706;
}

/* ===========================
   UTILITY CLASSES
   =========================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-sm {
  max-width: 768px;
}

.container-md {
  max-width: 900px;
}

.container-lg {
  max-width: 1200px;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.grid {
  display: grid;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

.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;
}

/* ===========================
   HEADER & NAVIGATION
   =========================== */

.site-header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.site-header.sticky {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) 0;
  gap: var(--spacing-xl);
}

.site-logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.site-logo:hover {
  color: var(--primary);
}

.site-logo img {
  height: 40px;
  width: auto;
}

/* Navigation */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-2xl);
  margin: 0;
  padding: 0;
}

.nav-menu a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-menu a:hover {
  color: var(--primary);
  background-color: var(--bg-secondary);
  text-decoration: none;
}

.nav-menu a.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-menu a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: var(--spacing-md);
  right: var(--spacing-md);
  height: 3px;
  background-color: var(--primary);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

/* Search Toggle */
.search-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-toggle:hover {
  color: var(--primary);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
}

.hamburger span {
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ===========================
   BREADCRUMBS
   =========================== */

.breadcrumbs {
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

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

.breadcrumbs a:hover {
  text-decoration: underline;
}

.breadcrumbs span {
  margin: 0 var(--spacing-sm);
}

/* ===========================
   HERO SECTION
   =========================== */

.hero-section {
  position: relative;
  height: 500px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: var(--spacing-3xl);
}

.hero-section.with-image {
  background-size: cover;
  background-position: center;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: white;
  max-width: 800px;
  padding: var(--spacing-2xl);
}

.hero-content h1 {
  color: white;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-5xl);
}

.hero-content .meta {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.hero-content .meta a {
  color: white;
}

/* Auto-generated featured image */
.featured-image-auto {
  position: relative;
  height: 300px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: var(--spacing-2xl);
  border-radius: var(--radius-lg);
}

.featured-image-auto::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.featured-image-auto-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: white;
}

.featured-image-auto-content h2 {
  color: white;
  font-size: var(--font-size-3xl);
  margin: 0;
}

/* ===========================
   CATEGORY FILTER BAR
   =========================== */

.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--border);
}

.filter-tag {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.filter-tag:hover,
.filter-tag.active {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary-dark);
}

/* ===========================
   POST GRIDS & LISTS
   =========================== */

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

.posts-grid.two-column {
  grid-template-columns: repeat(2, 1fr);
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

/* Post Card */
.post-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 100%;
}

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

.post-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: var(--bg-secondary);
}

.post-card-body {
  padding: var(--spacing-xl);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.post-card-category {
  display: inline-block;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
  width: fit-content;
}

.post-card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  line-height: var(--line-height-tight);
}

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

.post-card-title a:hover {
  color: var(--primary);
  text-decoration: none;
}

.post-card-excerpt {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  flex-grow: 1;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.post-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.post-card-meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.post-card-meta-item a {
  color: var(--text-muted);
}

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

.post-card-read-more {
  color: var(--primary);
  font-weight: 600;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.post-card-read-more:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Post List Item */
.post-list-item {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.post-list-item:hover {
  box-shadow: var(--shadow-md);
}

.post-list-item-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
}

.post-list-item-content {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.post-list-item-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.post-list-item-title a {
  color: var(--text-primary);
}

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

.post-list-item-excerpt {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
}

.post-list-item-meta {
  display: flex;
  gap: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ===========================
   SINGLE POST
   =========================== */

.single-post {
  margin-bottom: var(--spacing-3xl);
}

.post-header {
  margin-bottom: var(--spacing-2xl);
  text-align: center;
}

.post-header .category {
  display: inline-block;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
}

.post-header h1 {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.post-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

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

.post-meta-item a {
  color: var(--text-muted);
}

.post-meta-item a:hover {
  color: var(--primary);
}

.post-featured-image {
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-bottom: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  object-fit: cover;
}

/* Post Body Typography */
.post-body {
  max-width: 800px;
  margin: 0 auto var(--spacing-2xl);
}

.post-body h2 {
  margin-top: var(--spacing-3xl);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-3xl);
}

.post-body h3 {
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-2xl);
}

.post-body h4 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-lg);
}

.post-body p {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.post-body ul,
.post-body ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-2xl);
}

.post-body li {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
}

.post-body blockquote {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  border-left: 4px solid var(--primary);
  background-color: var(--bg-secondary);
  font-style: italic;
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
}

.post-body code {
  background-color: var(--bg-tertiary);
  color: var(--primary-dark);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  font-family: var(--font-mono);
}

.post-body pre {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  overflow-x: auto;
  margin-bottom: var(--spacing-xl);
}

.post-body pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
  font-size: var(--font-size-sm);
}

.post-body img {
  max-width: 100%;
  height: auto;
  margin: var(--spacing-xl) 0;
  border-radius: var(--radius-lg);
}

.post-body table {
  width: 100%;
  margin-bottom: var(--spacing-xl);
  border-collapse: collapse;
}

.post-body table th,
.post-body table td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border);
}

.post-body table th {
  background-color: var(--bg-secondary);
  font-weight: 600;
}

.post-body table tr:hover {
  background-color: var(--bg-tertiary);
}

/* ===========================
   TABLE OF CONTENTS
   =========================== */

.toc-wrapper {
  margin: var(--spacing-2xl) 0;
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.toc-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toc-toggle {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary);
  color: white;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 700;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.toc-toggle.collapsed {
  transform: rotate(-90deg);
}

.toc-content {
  max-height: 500px;
  overflow-y: auto;
  transition: max-height var(--transition-base);
}

.toc-content.collapsed {
  max-height: 0;
  overflow: hidden;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-list-item {
  margin: 0;
  padding: 0;
}

.toc-list-item a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  border-left: 3px solid transparent;
  transition: all var(--transition-fast);
}

.toc-list-item a:hover {
  color: var(--primary);
  background-color: var(--bg-primary);
  border-left-color: var(--primary);
}

.toc-list-item a.active {
  color: var(--primary);
  border-left-color: var(--primary);
  background-color: var(--bg-primary);
  font-weight: 600;
}

.toc-list-item ul {
  margin: 0;
  padding-left: var(--spacing-lg);
}

.toc-list-item ul li {
  margin: 0;
}

/* ===========================
   AUTHOR BOX
   =========================== */

.author-box {
  margin: var(--spacing-3xl) 0;
  padding: var(--spacing-xl);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--spacing-lg);
  align-items: start;
}

.author-box-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
}

.author-box-content h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-lg);
}

.author-box-bio {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
}

.author-box-social {
  display: flex;
  gap: var(--spacing-md);
}

.author-box-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--primary);
  color: white;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.author-box-social a:hover {
  background-color: var(--primary-dark);
  transform: scale(1.1);
}

/* ===========================
   RELATED POSTS
   =========================== */

.related-posts {
  margin: var(--spacing-3xl) 0;
}

.related-posts h2 {
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-2xl);
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

/* ===========================
   FAQ SECTION
   =========================== */

.faq-section {
  margin: var(--spacing-3xl) 0;
}

.faq-item {
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-question {
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  cursor: pointer;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
}

.faq-question:hover {
  background-color: var(--bg-tertiary);
}

.faq-question.active {
  background-color: var(--primary);
  color: white;
}

.faq-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
}

.faq-toggle.active {
  transform: rotate(180deg);
}

.faq-answer {
  padding: var(--spacing-lg);
  background-color: var(--bg-primary);
  display: none;
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

.faq-answer.active {
  display: block;
}

.faq-answer p {
  margin-bottom: var(--spacing-md);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* ===========================
   COMMENTS SECTION
   =========================== */

.comments-section {
  margin: var(--spacing-3xl) 0;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.comments-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.comments-list {
  list-style: none;
  margin-bottom: var(--spacing-2xl);
  padding: 0;
}

.comment-item {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.comment-item.reply {
  margin-left: var(--spacing-xl);
  background-color: var(--bg-tertiary);
}

.comment-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.comment-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--primary);
}

.comment-meta {
  flex: 1;
}

.comment-author {
  font-weight: 600;
  color: var(--text-primary);
  display: block;
}

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

.comment-text {
  color: var(--text-primary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
}

.comment-reply-link {
  font-size: var(--font-size-sm);
  color: var(--primary);
  font-weight: 500;
}

/* Comment Form */
.comment-form {
  background-color: var(--bg-secondary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.comment-form-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

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

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

.form-group input,
.form-group textarea {
  width: 100%;
}

.form-group.inline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.form-group.inline input {
  width: 100%;
}

/* ===========================
   SHARE BUTTONS
   =========================== */

.share-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin: var(--spacing-2xl) 0;
  flex-wrap: wrap;
}

.share-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.share-button:hover {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}

.share-button.copied {
  background-color: #10b981;
  color: white;
  border-color: #10b981;
}

/* ===========================
   POST NAVIGATION
   =========================== */

.post-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin: var(--spacing-3xl) 0;
  padding: var(--spacing-xl);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.post-nav-item {
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.post-nav-item:hover {
  background-color: var(--bg-primary);
}

.post-nav-label {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.post-nav-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--primary);
}

.post-nav-item.prev {
  text-align: left;
}

.post-nav-item.next {
  text-align: right;
}

.post-nav-item.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.post-nav-item.disabled:hover {
  background-color: transparent;
}

/* ===========================
   SIDEBAR WIDGETS
   =========================== */

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
}

.widget {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.widget-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--primary);
}

/* Search Widget */
.widget-search {
  display: flex;
  gap: var(--spacing-sm);
}

.widget-search input {
  flex: 1;
  padding: var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.widget-search button {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
}

/* Categories Widget */
.widget-categories ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.widget-categories li {
  margin: 0;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border);
}

.widget-categories li:last-child {
  border-bottom: none;
}

.widget-categories a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.widget-categories a:hover {
  color: var(--primary);
}

.widget-categories-count {
  background-color: var(--primary);
  color: white;
  font-size: var(--font-size-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* Popular Posts Widget */
.widget-posts ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.widget-posts li {
  margin: 0 0 var(--spacing-lg) 0;
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
}

.widget-posts li:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.widget-posts a {
  color: var(--text-primary);
  font-weight: 500;
  text-decoration: none;
  display: block;
  margin-bottom: var(--spacing-sm);
}

.widget-posts a:hover {
  color: var(--primary);
}

.widget-posts-date {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* Tags Widget */
.widget-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.widget-tags a {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.widget-tags a:hover {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Social Links Widget */
.widget-social {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.widget-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--primary);
  color: white;
  border-radius: 50%;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.widget-social a:hover {
  background-color: var(--primary-dark);
  transform: scale(1.1);
}

/* Newsletter Widget */
.widget-newsletter {
  text-align: center;
}

.widget-newsletter p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.widget-newsletter form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.widget-newsletter input {
  padding: var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.widget-newsletter button {
  padding: var(--spacing-md);
  background-color: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.widget-newsletter button:hover {
  background-color: #d97706;
}

/* ===========================
   AD PLACEHOLDERS
   =========================== */

.ad-banner {
  background-color: var(--bg-secondary);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  margin: var(--spacing-2xl) 0;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.ad-header {
  height: 90px;
  margin-bottom: var(--spacing-2xl);
}

.ad-in-content {
  height: 250px;
  margin: var(--spacing-2xl) 0;
}

.ad-sidebar {
  height: 300px;
}

.ad-footer {
  height: 100px;
  margin: var(--spacing-2xl) 0;
}

/* ===========================
   CUSTOM GUTENBERG BLOCKS
   =========================== */

/* Alert Blocks */
.alert-box {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
  margin: var(--spacing-lg) 0;
}

.alert-box p {
  margin: 0;
}

.alert-info {
  border-left-color: #2563eb;
  background-color: #dbeafe;
  color: #1d4ed8;
}

.alert-warning {
  border-left-color: #f59e0b;
  background-color: #fef3c7;
  color: #d97706;
}

.alert-success {
  border-left-color: #10b981;
  background-color: #d1fae5;
  color: #047857;
}

.alert-danger {
  border-left-color: #ef4444;
  background-color: #fee2e2;
  color: #dc2626;
}

/* Tip Box */
.tip-box {
  padding: var(--spacing-lg);
  background-color: #fef3c7;
  border: 1px solid #fcd34d;
  border-radius: var(--radius-lg);
  margin: var(--spacing-lg) 0;
  border-left: 4px solid #f59e0b;
}

.tip-box p {
  margin: 0;
  color: #854d0e;
}

/* Note Box */
.note-box {
  padding: var(--spacing-lg);
  background-color: #e0e7ff;
  border: 1px solid #c7d2fe;
  border-radius: var(--radius-lg);
  margin: var(--spacing-lg) 0;
  border-left: 4px solid #6366f1;
}

.note-box p {
  margin: 0;
  color: #3730a3;
}

/* ===========================
   PAGINATION
   =========================== */

.pagination {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-3xl) 0;
  flex-wrap: wrap;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--spacing-sm);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.pagination a:hover {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}

.pagination .current {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}

.pagination .dots {
  color: var(--text-muted);
  border: none;
}

/* ===========================
   SCROLL TO TOP BUTTON
   =========================== */

.scroll-to-top {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 48px;
  height: 48px;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: var(--z-fixed);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-lg);
}

.scroll-to-top.visible {
  display: flex;
}

.scroll-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

/* ===========================
   READING PROGRESS BAR
   =========================== */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: var(--z-modal);
  transition: width var(--transition-fast);
  width: 0;
}

/* ===========================
   SEARCH OVERLAY
   =========================== */

.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: flex-start;
  justify-content: center;
  z-index: var(--z-modal);
  padding-top: 100px;
}

.search-overlay.active {
  display: flex;
}

.search-overlay-content {
  width: 100%;
  max-width: 600px;
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-2xl);
  animation: slideDown 300ms ease;
}

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

.search-overlay-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  cursor: pointer;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.search-overlay-close:hover {
  color: var(--text-primary);
}

.search-overlay input {
  width: 100%;
  padding: var(--spacing-lg);
  font-size: var(--font-size-lg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.search-results {
  max-height: 400px;
  overflow-y: auto;
}

.search-result-item {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-result-item:hover {
  background-color: var(--bg-secondary);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-title {
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.search-result-excerpt {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* ===========================
   404 PAGE
   =========================== */

.page-404 {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.page-404-number {
  font-size: 120px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.page-404-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
}

.page-404-message {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
}

.page-404-actions {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===========================
   FOOTER
   =========================== */

.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
  margin-top: var(--spacing-3xl);
}

.footer-content {
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
}

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

.footer-widget {
  padding: var(--spacing-lg);
}

.footer-widget h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  margin-top: 0;
}

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

.footer-widget li {
  margin: 0 0 var(--spacing-sm) 0;
}

.footer-widget a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-widget a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: var(--spacing-xl) 0;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.footer-bottom p {
  margin: 0;
}

/* ===========================
   MOBILE MENU
   =========================== */

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: 0;
    z-index: calc(var(--z-fixed) - 1);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }

  .site-nav.active {
    transform: translateX(0);
  }

  .nav-menu {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .nav-menu li {
    border-bottom: 1px solid var(--border);
  }

  .nav-menu a {
    display: block;
    padding: var(--spacing-lg);
    border-radius: 0;
  }

  .nav-menu a.active::after {
    display: none;
  }

  .nav-menu a.active {
    background-color: var(--bg-secondary);
    font-weight: 600;
  }

  .posts-grid.two-column {
    grid-template-columns: 1fr;
  }

  .post-list-item {
    grid-template-columns: 1fr;
  }

  .post-list-item-image {
    height: 250px;
  }

  .author-box {
    grid-template-columns: 80px 1fr;
  }

  .author-box-avatar {
    width: 80px;
    height: 80px;
  }

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

  .post-nav-item.next {
    text-align: left;
  }

  .toc-wrapper {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
  }

  .comment-item.reply {
    margin-left: var(--spacing-md);
  }

  .hero-section {
    height: 300px;
  }

  .hero-content h1 {
    font-size: var(--font-size-3xl);
  }

  .featured-image-auto-content h2 {
    font-size: var(--font-size-2xl);
  }

  .post-header h1 {
    font-size: var(--font-size-3xl);
  }

  .scroll-to-top {
    width: 44px;
    height: 44px;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
  }

  .search-overlay-content {
    max-width: calc(100% - var(--spacing-lg) * 2);
  }
}

/* ===========================
   RESPONSIVE: TABLET
   =========================== */

@media (max-width: 1024px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-5xl: 2.5rem;
  }

  .container {
    padding: 0 var(--spacing-lg);
  }

  .footer-widgets {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===========================
   ANIMATIONS
   =========================== */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn 400ms ease;
}

.slide-in-up {
  animation: slideInUp 500ms ease;
}

/* ===========================
   PRINT STYLES
   =========================== */

@media print {
  .site-header,
  .site-footer,
  .sidebar,
  .comments-section,
  .scroll-to-top,
  .share-buttons,
  .related-posts,
  .post-navigation,
  .ad-banner {
    display: none;
  }

  .post-body {
    max-width: 100%;
  }

  a {
    color: var(--primary);
  }

  body {
    font-size: 12pt;
    line-height: 1.6;
  }
}

/* ===========================
   ACCESSIBILITY
   =========================== */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root:not(.light-mode) {
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --border: #475569;
  }
}