/* ============================================================
   Modern Blog Theme - 2025
   Consolidated stylesheet replacing darkmode, home, media, 
   pagination, post, and tags CSS files
   ============================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Colors */
  --color-primary: #6366f1;
  --color-primary-light: #818cf8;
  --color-primary-dark: #4f46e5;
  --color-accent: #06b6d4;
  --color-accent-light: #22d3ee;
  
  /* Surfaces */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-hover: #f1f5f9;
  --color-surface-elevated: #ffffff;
  
  /* Text */
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-heading: #0f172a;
  
  /* Borders & Shadows */
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 50px -12px rgba(0,0,0,0.15);
  
  /* Layout */
  --sidebar-width: 280px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 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;
}

/* --- Dark Mode Variables --- */
html.dark-mode {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-surface-hover: #334155;
  --color-surface-elevated: #1e293b;
  --color-text: #e2e8f0;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-heading: #f1f5f9;
  --color-border: #334155;
  --color-border-light: #1e293b;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.5);
  --shadow-xl: 0 20px 50px -12px rgba(0,0,0,0.6);
  --color-primary: #818cf8;
  --color-primary-light: #a5b4fc;
  --color-primary-dark: #6366f1;
  --color-accent: #22d3ee;
}

/* Support OS-level dark mode preference */
@media (prefers-color-scheme: dark) {
  html:not(.light-mode):not(.dark-mode) {
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-surface-hover: #334155;
    --color-surface-elevated: #1e293b;
    --color-text: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-heading: #f1f5f9;
    --color-border: #334155;
    --color-border-light: #1e293b;
    --color-primary: #818cf8;
    --color-primary-light: #a5b4fc;
    --color-primary-dark: #6366f1;
  }
}

/* --- Base Overrides --- */
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.3;
}

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

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

::selection {
  background: var(--color-primary);
  color: #fff;
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 0.5rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--color-surface-hover);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

pre {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 1.25rem;
  overflow-x: auto;
  position: relative;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.highlighter-rouge {
  background: var(--color-surface-hover);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.15rem 0.4rem;
  font-weight: 500;
}

img {
  border-radius: var(--border-radius-sm);
}

table {
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

table thead {
  background: var(--color-primary);
}

table thead th {
  color: #fff;
  border-left: 1px solid rgba(255,255,255,0.15);
  padding: 0.75rem;
}

table td {
  border: 1px solid var(--color-border);
  padding: 0.6rem 0.75rem;
  color: var(--color-text);
}

table tr:nth-child(even) {
  background: var(--color-surface-hover);
}

/* --- Reading Progress Bar --- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 9999;
  transition: width 50ms linear;
}

/* --- Navbar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

html.dark-mode .navbar {
  background: rgba(15, 23, 42, 0.85);
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 2rem;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-heading);
  font-weight: 700;
  font-size: var(--font-size-lg);
  transition: opacity var(--transition-fast);
}

.navbar-brand:hover {
  opacity: 0.8;
  color: var(--color-heading);
}

.navbar-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-primary);
  transition: box-shadow var(--transition-base);
}

.navbar-brand:hover .navbar-avatar {
  box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}

.navbar-name {
  letter-spacing: -0.01em;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.navbar-social {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar-social li a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--color-text-secondary);
  font-size: 16px;
  transition: all var(--transition-base);
}

.navbar-social li a:hover {
  color: var(--color-primary);
  background: var(--color-surface-hover);
  transform: translateY(-1px);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 16px;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  line-height: 1;
}

.nav-toggle-btn:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

/* Hamburger button */
.navbar-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  padding: 0;
  transition: all var(--transition-base);
}

.navbar-hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.navbar-hamburger.active span:nth-child(2) {
  opacity: 0;
}
.navbar-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.navbar-mobile {
  display: none;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem 2rem 1.25rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.navbar-mobile.open {
  display: flex;
}

.navbar-mobile .navbar-social {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}

.navbar-mobile .navbar-social li a {
  width: auto;
  height: auto;
  padding: 0.5rem 0.75rem;
  border-radius: var(--border-radius-sm);
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.navbar-mobile .navbar-social li a:hover {
  background: var(--color-surface-hover);
}

.navbar-mobile .navbar-actions {
  gap: 0.5rem;
}

.navbar-mobile .nav-toggle-btn {
  width: auto;
  padding: 0.5rem 0.75rem;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  gap: 0.4rem;
}

/* --- Main Content (replaces sidebar-based content-box) --- */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  min-height: calc(100vh - 200px);
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: flex-start;
}

/* --- Site Footer --- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: 3rem;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem 2rem;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
}

.footer-about .footer-bio {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.7;
  margin: 0;
}

.footer-section-title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-text-muted);
  margin: 0 0 1rem;
}

.footer-platform-list,
.footer-contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-platform-list li a,
.footer-contact-list li a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: 0.2rem 0;
}

.footer-platform-list li a:hover,
.footer-contact-list li a:hover {
  color: var(--color-primary);
}

.footer-platform-list li a i,
.footer-contact-list li a i {
  width: 18px;
  text-align: center;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-platform-list li a:hover i,
.footer-contact-list li a:hover i {
  color: var(--color-primary);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

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

/* --- Post Cards --- */
.post {
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  min-height: 12rem;
  border-radius: var(--border-radius);
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  animation: fadeInUp 0.4s ease-out both;
}

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

.post:nth-child(1) { animation-delay: 0.05s; }
.post:nth-child(2) { animation-delay: 0.1s; }
.post:nth-child(3) { animation-delay: 0.15s; }
.post:nth-child(4) { animation-delay: 0.2s; }
.post:nth-child(5) { animation-delay: 0.25s; }

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

.post .post-thumbnail {
  width: 30%;
  max-width: 100%;
  min-height: 12rem;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition-slow);
}

.post:hover .post-thumbnail {
  transform: scale(1.05);
}

.post .post-content {
  padding: 1.5rem;
  width: 70%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.post .post-content .post-title {
  margin: 0 0 0.5rem;
  font-size: var(--font-size-xl);
  font-weight: 700;
  line-height: 1.3;
}

.post .post-content .post-title a {
  font-family: var(--font-sans);
  text-decoration: none;
  color: var(--color-heading);
  transition: color var(--transition-fast);
}

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

.post .post-content p {
  margin: 0 0 0.75rem;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.post .post-content .post-date,
.post .post-content .post-words {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}

.post .post-content .post-words {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* --- Pagination --- */
.pagination-container {
  display: flex;
  justify-content: center;
  width: 100%;
  margin-top: 2rem;
  padding-bottom: 2rem;
}

.pagination ul {
  display: flex;
  list-style: none;
  gap: 0.75rem;
  align-items: center;
  padding: 0;
  margin: 0;
}

.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.25rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--border-radius-full);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.page-btn:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.page-number {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* --- Article / Post Page --- */
.article-page {
  background: var(--color-surface);
  border-radius: 0;
}

.wrap-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 2.5rem;
  background: var(--color-surface);
  transition: background-color var(--transition-base);
}

.header-page {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.header-page .page-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-heading);
  margin: 0 0 0.75rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.header-page .page-date {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.page-cover-image {
  position: relative;
  padding: 0;
  margin: 0 0 2rem;
  max-height: 500px;
  background-color: var(--color-surface-hover);
  overflow: hidden;
  border-radius: var(--border-radius);
}

.page-cover-image figure {
  margin: 0;
}

.page-cover-image .page-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--border-radius);
}

.page-cover-image figcaption {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 0.4rem 0.75rem;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  border-radius: var(--border-radius-sm);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Article content typography */
.wrap-content h2 {
  font-size: var(--font-size-2xl);
  margin: 2rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

.wrap-content h3 {
  font-size: var(--font-size-xl);
  margin: 1.5rem 0 0.75rem;
}

.wrap-content p {
  margin: 0 0 1.25rem;
  line-height: 1.8;
}

.wrap-content ul, .wrap-content ol {
  margin: 0.75rem 0 1.25rem;
  padding-left: 1.5rem;
}

.wrap-content li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

/* Listen button */
.listen-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  margin-bottom: 1.5rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  border: none;
  border-radius: var(--border-radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-sans);
  box-shadow: var(--shadow-sm);
}

.listen-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  opacity: 0.95;
}

/* Page footer (share + tags) */
.page-footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.5rem 0;
  margin: 2rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.page-footer .page-share {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.page-footer .page-share a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  text-decoration: none;
  background: var(--color-surface-hover);
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.75rem;
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--border-radius-full);
  transition: all var(--transition-base);
}

.page-footer .page-share a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  transform: translateY(-1px);
}

.page-footer .page-tag {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.page-footer .page-tag a {
  display: inline-block;
  text-decoration: none;
  font-size: var(--font-size-xs);
  padding: 0.3rem 0.6rem;
  color: var(--color-primary);
  text-transform: lowercase;
  border: 1px solid var(--color-primary);
  border-radius: var(--border-radius-full);
  transition: all var(--transition-base);
  font-weight: 500;
}

.page-footer .page-tag a:hover {
  background: var(--color-primary);
  color: #fff;
}

/* --- Tags Page --- */
.blog-tags {
  width: 100%;
  padding: 1rem 2rem 2rem;
  background: transparent;
}

.blog-tags h1 {
  font-size: var(--font-size-3xl);
  text-align: center;
  color: var(--color-heading);
  margin-bottom: 1.5rem;
  font-weight: 800;
}

.blog-tags h2 {
  color: var(--color-heading);
  margin: 1.5rem 0 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
  font-size: var(--font-size-xl);
}

.tags {
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

.tags li a,
a.tag {
  display: inline-block;
  text-decoration: none;
  color: var(--color-primary);
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--color-primary);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  transition: all var(--transition-base);
  background: transparent;
}

.tags li a:hover,
a.tag:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.tags li a span {
  color: var(--color-text-muted);
  font-weight: 400;
}

.tag-list {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.tag-list span a {
  text-decoration: none;
  color: var(--color-heading);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.tag-list span a:hover {
  color: var(--color-primary);
}

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

/* --- Scroll To Top --- */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 1000;
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

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

/* --- Back to Home link in posts --- */
.back-to-home {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem;
  margin: 1rem 1.5rem;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--border-radius-full);
  transition: all var(--transition-base);
}

.back-to-home:hover {
  color: var(--color-primary);
  background: var(--color-surface-hover);
}

/* --- Copy Code Button --- */
.highlight {
  position: relative;
  background: var(--color-surface-hover);
  border-radius: var(--border-radius-sm);
  margin: 1.25rem 0;
}

.copy-code-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 0.3rem 0.6rem;
  font-size: var(--font-size-xs);
  font-weight: 500;
  font-family: var(--font-sans);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  color: var(--color-text-muted);
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition-fast);
  z-index: 2;
}

.highlight:hover .copy-code-btn {
  opacity: 1;
}

.copy-code-btn:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.copy-code-btn.copied {
  background: #10b981;
  color: #fff;
  border-color: #10b981;
  opacity: 1;
}

/* --- Disqus overrides --- */
.comment-area {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

/* --- Responsive --- */
@media only screen and (max-width: 1100px) {
  .post {
    flex-direction: column;
  }
  .post .post-thumbnail {
    width: 100%;
    min-height: 200px;
  }
  .post .post-content {
    width: 100%;
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
  .footer-about {
    grid-column: 1 / -1;
  }
}

@media only screen and (max-width: 768px) {
  .navbar-links {
    display: none;
  }
  .navbar-hamburger {
    display: flex;
  }
  .main-content {
    padding: 1.5rem;
  }
  .header-page .page-title {
    font-size: var(--font-size-2xl);
  }
  .wrap-content {
    padding: 1.5rem;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    padding: 2rem 1.5rem 1.5rem;
  }
  .footer-about {
    grid-column: auto;
  }
}

@media only screen and (max-width: 480px) {
  .main-content {
    padding: 1rem;
  }
  .navbar-inner {
    padding: 0.75rem 1rem;
  }
  .post .post-content .post-title {
    font-size: var(--font-size-lg);
  }
  .page-footer {
    flex-direction: column;
  }
}

/* --- Utility --- */
.accent {
  color: var(--color-primary);
  font-weight: 600;
}

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

/* --- 404 Page --- */
.page-404 {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: 2rem;
}

.page-404 h1 {
  font-size: 6rem;
  font-weight: 900;
  color: var(--color-primary);
  margin: 0;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-404 p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin: 1rem 0 2rem;
}

.page-404 a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--border-radius-full);
  font-weight: 600;
  transition: all var(--transition-base);
}

.page-404 a:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

/* --- Search Page --- */
.search-page {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
}

.search-header h1 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 1rem;
  color: var(--color-text-muted);
  font-size: 16px;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.9rem 2.5rem 0.9rem 2.75rem;
  font-size: var(--font-size-base);
  font-family: var(--font-sans);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-full);
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.search-clear {
  position: absolute;
  right: 1rem;
  background: none;
  border: none;
  font-size: 16px;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
  transition: color var(--transition-fast);
}

.search-clear:hover {
  color: var(--color-text);
}

.search-results {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.search-result-item {
  display: block;
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: all var(--transition-base);
}

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

.search-result-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 0.4rem;
}

.search-result-item:hover .search-result-title {
  color: var(--color-primary);
}

.search-result-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.search-tag {
  color: var(--color-primary);
  font-weight: 500;
}

.search-result-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.search-empty {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  margin-top: 3rem;
}