/* ============================================
   The Second Theme - Modern CSS with Dark/Light Mode
   ============================================ */

/* CSS Variables for Theme Colors */
:root {
  /* Light mode colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #868e96;
  --accent-primary: #0066cc;
  --accent-hover: #0052a3;
  --border-color: #dee2e6;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
  --code-bg: #f4f4f4;
  --link-color: #0066cc;
  --link-hover: #0052a3;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Helvetica Neue', sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Droid Sans Mono', 'Courier New', monospace;
  
  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  --transition-theme: 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent-primary: #3b82f6;
    --accent-hover: #60a5fa;
    --border-color: #404040;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
    --code-bg: #1e1e1e;
    --link-color: #60a5fa;
    --link-hover: #93c5fd;
  }
}

/* Manual theme toggle override */
html[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #868e96;
  --accent-primary: #0066cc;
  --accent-hover: #0052a3;
  --border-color: #dee2e6;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
  --code-bg: #f4f4f4;
  --link-color: #0066cc;
  --link-hover: #0052a3;
}

html[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #3a3a3a;
  --text-primary: #e4e4e7;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-primary: #3b82f6;
  --accent-hover: #60a5fa;
  --border-color: #404040;
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-lg: rgba(0, 0, 0, 0.5);
  --code-bg: #1e1e1e;
  --link-color: #60a5fa;
  --link-hover: #93c5fd;
}

/* ============================================
   Base Styles
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: 
    background-color var(--transition-theme),
    color var(--transition-theme);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

/* View Transitions API - Radial wipe animation with feathered edge */
::view-transition-old(root) {
  animation: none;
  z-index: 1;
}

::view-transition-new(root) {
  animation: revealCircleMask 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2;
  mix-blend-mode: normal;
}

::view-transition-group(root) {
  animation-duration: 0.7s;
  animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

::view-transition-old(root) {
  z-index: 1;
}

::view-transition-new(root) {
  z-index: 2;
  animation: revealCircle 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

::view-transition-group(root) {
  animation-duration: 0.7s;
}

/* Add blur/feather effect to transition */
::view-transition-image-pair(root) {
  isolation: isolate;
}

::view-transition-new(root) {
  filter: blur(0px);
  animation: revealCircleBlur 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Fallback for browsers without View Transitions API */
html:not(.view-transitions-supported) {
  transition: none;
}

html:not(.view-transitions-supported) body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--bg-primary);
  pointer-events: none;
  z-index: 9998;
  opacity: 0;
  transition: none;
  mask-image: radial-gradient(
    circle at var(--theme-x, 50%) var(--theme-y, 50%),
    black 0%,
    black 0%,
    transparent 0%
  );
  -webkit-mask-image: radial-gradient(
    circle at var(--theme-x, 50%) var(--theme-y, 50%),
    black 0%,
    black 0%,
    transparent 0%
  );
}

html:not(.view-transitions-supported) body.theme-transitioning::after {
  animation: maskExpand 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  transition: color var(--transition-theme);
}

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

p {
  margin-bottom: var(--spacing-lg);
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color var(--transition-theme);
  -webkit-tap-highlight-color: transparent;
}

a:hover,
a:active {
  color: var(--link-hover);
  transition: color var(--transition-fast);
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

/* ============================================
   Layout
   ============================================ */

.container {
  max-width: 1170px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  width: 100%;
  overflow-x: hidden;
}

.content-wrapper {
  max-width: 1170px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
  width: 100%;
  overflow-x: hidden;
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
  transition: 
    background-color var(--transition-theme),
    border-color var(--transition-theme),
    box-shadow var(--transition-theme);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 80%;
  max-width: none;
  margin: 0 auto;
  padding: 0;
  flex-wrap: nowrap;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: color var(--transition-theme);
  white-space: nowrap;
}

.navbar-menu {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
  list-style: none;
  flex-wrap: nowrap;
}

.navbar-item {
  white-space: nowrap;
}

.navbar-item a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-theme);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  white-space: nowrap;
}

.navbar-item a:hover {
  transition: color var(--transition-fast);
}

.navbar-item.active a {
  color: var(--accent-primary);
}

/* Theme toggle button - clean icon style */
.theme-toggle {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: 
    color var(--transition-theme),
    transform var(--transition-fast),
    opacity var(--transition-fast);
  position: relative;
  width: 32px;
  height: 32px;
}

.theme-toggle:hover {
  transform: scale(1.15);
  opacity: 0.7;
}

.theme-toggle:active {
  transform: scale(0.9);
}

/* Hide avatar at medium sizes to prevent overlap */
@media (max-width: 1300px) {
  .avatar-container {
    display: none;
  }
}

/* Collapse menu to hamburger at smaller sizes */
@media (max-width: 900px) {
  .mobile-menu-toggle {
    display: block !important;
    padding: var(--spacing-sm);
    min-width: 44px;
    min-height: 44px;
  }
  
  .navbar {
    position: relative;
  }
  
  .navbar-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-100%);
    opacity: 0;
    transition: 
      transform var(--transition-base), 
      opacity var(--transition-base),
      background-color var(--transition-theme),
      border-color var(--transition-theme);
    pointer-events: none;
    box-shadow: 0 4px 8px var(--shadow);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    gap: 0;
    z-index: 999;
  }
  
  .navbar-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .navbar-item {
    width: 100%;
    border-bottom: 1px solid var(--border-color);
  }
  
  .navbar-item:last-child {
    border-bottom: none;
  }
  
  .navbar-item a {
    padding: var(--spacing-md) 0;
    display: flex;
    font-size: 1.125rem;
    min-height: 44px;
    align-items: center;
    width: 100%;
  }
  
  .theme-toggle {
    width: auto;
    justify-content: center;
    padding: var(--spacing-md);
    min-height: 44px;
    margin: 0 auto;
  }
}

/* Avatar in navigation */
.avatar-container {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 100%;
  margin-top: -40px;
}

.avatar-img-border {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
  background-color: var(--bg-primary);
  overflow: hidden;
  box-shadow: 0 2px 8px var(--shadow);
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Mobile menu toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
}

/* ============================================
   Header / Hero
   ============================================ */

.hero {
  position: relative;
  padding: var(--spacing-2xl) 0;
  text-align: center;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  border-bottom: 1px solid var(--border-color);
  transition: 
    background var(--transition-theme),
    border-color var(--transition-theme);
}

.hero.has-image {
  padding: 6rem 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  min-height: 574px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero.has-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.hero-content {
  max-width: 1170px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  position: relative;
  z-index: 2;
}

.hero.has-image .hero-title,
.hero.has-image .hero-subtitle,
.hero.has-image .post-meta {
  color: #ffffff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-title {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

/* Image description / credit */
.image-credit {
  position: absolute;
  bottom: var(--spacing-md);
  right: var(--spacing-lg);
  font-size: 0.875rem;
  color: #ffffff;
  background: rgba(0, 0, 0, 0.6);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  z-index: 2;
  font-style: italic;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.post-meta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: left;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 0.95rem;
}

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

/* ============================================
   Article / Blog Post
   ============================================ */

article {
  padding: var(--spacing-2xl) 0;
}

article img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  transition: 
    filter var(--transition-theme),
    opacity var(--transition-theme);
}

article ul, article ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

article li {
  margin-bottom: var(--spacing-sm);
}

article blockquote {
  border-left: 4px solid var(--accent-primary);
  padding-left: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
  font-style: italic;
  color: var(--text-secondary);
  transition: 
    border-color var(--transition-theme),
    color var(--transition-theme);
}

article hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: var(--spacing-2xl) 0;
  transition: border-color var(--transition-theme);
}

/* Code blocks */
article pre {
  background-color: var(--code-bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  transition: 
    background-color var(--transition-theme),
    border-color var(--transition-theme),
    color var(--transition-theme);
}

article code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--text-primary);
  transition: 
    background-color var(--transition-theme),
    border-color var(--transition-theme),
    color var(--transition-theme);
}

article :not(pre) > code {
  background-color: var(--code-bg);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

/* Tables */
article table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
}

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

article th {
  background-color: var(--bg-secondary);
  font-weight: 600;
}

/* ============================================
   Tags
   ============================================ */

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-xl) 0;
}

.tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tag:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--bg-primary);
}

/* ============================================
   Post List / Archive
   ============================================ */

.posts-list {
  list-style: none;
  padding: 0;
}

.post-preview {
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid var(--border-color);
}

.post-preview:last-child {
  border-bottom: none;
}

.post-preview-title {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
}

.post-preview-subtitle {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.post-preview-excerpt {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

/* ============================================
   Pagination
   ============================================ */

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

.pagination-link {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.pagination-link:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--bg-primary);
}

/* ============================================
   Footer
   ============================================ */

footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-2xl);
  overflow-x: hidden;
  width: 100%;
  transition: 
    background-color var(--transition-theme),
    border-color var(--transition-theme);
}

.footer-content {
  text-align: center;
  max-width: 100%;
  overflow-x: hidden;
}

.footer-links {
  display: inline-flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: var(--spacing-lg);
  list-style: none;
  padding: 0;
  max-width: 100%;
}

.footer-links li {
  display: inline-block;
  margin: 0;
  flex-shrink: 0;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-secondary);
  transition: 
    color var(--transition-theme),
    transform var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-primary);
  transform: scale(1.1);
  transition: 
    color var(--transition-fast),
    transform var(--transition-fast);
}

.list-inline {
  padding-left: 0;
  list-style: none;
}

.list-inline > li {
  display: inline-block;
  padding-right: 5px;
  padding-left: 5px;
}

.text-center {
  text-align: center;
}

.copyright {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablet adjustments */
@media (max-width: 1024px) {
  .container,
  .content-wrapper {
    padding: 0 var(--spacing-md);
  }
  
  .navbar-container {
    width: 90%;
  }
  
  .hero-content {
    padding: 0 var(--spacing-md);
  }
}

/* Mobile adjustments */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }
  
  body {
    font-size: 1rem;
    line-height: 1.6;
  }
  
  /* Typography */
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  h4 { font-size: 1.125rem; }
  h5 { font-size: 1rem; }
  h6 { font-size: 0.95rem; }
  
  /* Layout */
  .container,
  .content-wrapper {
    padding: 0 var(--spacing-md);
    max-width: 100%;
  }
  
  /* Navigation - inherits from 1100px breakpoint */
  .navbar {
    padding: var(--spacing-sm) 0;
  }
  
  .navbar-container {
    width: 100%;
    padding: 0 var(--spacing-md);
  }
  
  .navbar-brand {
    font-size: 1.25rem;
  }
  
  /* Hero */
  .hero {
    padding: var(--spacing-xl) 0;
  }
  
  .hero.has-image {
    min-height: 400px;
    padding: 3rem 0;
  }
  
  .hero-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
  }
  
  .hero-subtitle {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
  }
  
  .hero-content {
    padding: 0 var(--spacing-md);
  }
  
  .image-credit {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
  }
  
  /* Post meta */
  .post-meta {
    font-size: 0.875rem;
    gap: var(--spacing-sm);
  }
  
  .post-meta-item {
    gap: 0.25rem;
  }
  
  /* Articles */
  article {
    padding: var(--spacing-lg) 0;
  }
  
  article ul, article ol {
    padding-left: var(--spacing-lg);
  }
  
  article pre {
    padding: var(--spacing-md);
    font-size: 0.875rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  article blockquote {
    padding-left: var(--spacing-md);
    margin: var(--spacing-lg) 0;
  }
  
  /* Post previews */
  .post-preview {
    padding: var(--spacing-lg) 0;
  }
  
  .post-preview-title {
    font-size: 1.5rem;
  }
  
  .post-preview-subtitle {
    font-size: 1rem;
  }
  
  /* Tags */
  .tags {
    gap: var(--spacing-xs);
  }
  
  .tag {
    font-size: 0.8rem;
    padding: 0.2rem var(--spacing-sm);
  }
  
  /* Pagination */
  .pagination {
    padding: var(--spacing-md) 0;
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .pagination-link {
    width: 100%;
    text-align: center;
    padding: var(--spacing-md);
  }
  
  /* Footer */
  footer {
    padding: var(--spacing-xl) var(--spacing-md);
    overflow-x: hidden;
  }
  
  .footer-content {
    padding: 0;
    max-width: 100%;
  }
  
  .footer-links {
    gap: 0;
    max-width: 100%;
    padding: 0;
    margin: 0 auto var(--spacing-md);
  }
  
  .footer-links li {
    padding: 0 2px;
  }
  
  /* Make social icons smaller on mobile if needed */
  .footer-links .fa-stack {
    font-size: 1rem;
  }
  
  .copyright {
    font-size: 0.8rem;
    padding: 0 var(--spacing-sm);
    word-wrap: break-word;
  }
}

/* ============================================
   Scroll Progress Bar
   ============================================ */

.progress-bar {
  background: linear-gradient(to right, var(--accent-primary) var(--scroll), transparent 0);
  background-repeat: no-repeat;
  width: 100%;
  position: fixed;
  bottom: 0;
  left: 0;
  height: 4px;
  z-index: 100;
  transition: background var(--transition-theme);
}

/* ============================================
   Theme Transition Animations
   ============================================ */

@keyframes revealCircleMask {
  from {
    mask-image: radial-gradient(
      circle at var(--theme-x, 50%) var(--theme-y, 50%),
      black 0%,
      black 0%,
      rgba(0, 0, 0, 0.5) 0%,
      transparent 0%
    );
    -webkit-mask-image: radial-gradient(
      circle at var(--theme-x, 50%) var(--theme-y, 50%),
      black 0%,
      black 0%,
      rgba(0, 0, 0, 0.5) 0%,
      transparent 0%
    );
  }
  to {
    mask-image: radial-gradient(
      circle at var(--theme-x, 50%) var(--theme-y, 50%),
      black 0%,
      black 145%,
      rgba(0, 0, 0, 0.5) 147.5%,
      transparent 150%
    );
    -webkit-mask-image: radial-gradient(
      circle at var(--theme-x, 50%) var(--theme-y, 50%),
      black 0%,
      black 145%,
      rgba(0, 0, 0, 0.5) 147.5%,
      transparent 150%
    );
  }
}

@keyframes maskExpand {
  0% {
    opacity: 1;
    mask-image: radial-gradient(
      circle at var(--theme-x, 50%) var(--theme-y, 50%),
      black 0%,
      black 0%,
      rgba(0, 0, 0, 0.5) 0%,
      transparent 0%
    );
    -webkit-mask-image: radial-gradient(
      circle at var(--theme-x, 50%) var(--theme-y, 50%),
      black 0%,
      black 0%,
      rgba(0, 0, 0, 0.5) 0%,
      transparent 0%
    );
  }
  99% {
    opacity: 1;
    mask-image: radial-gradient(
      circle at var(--theme-x, 50%) var(--theme-y, 50%),
      black 0%,
      black 145%,
      rgba(0, 0, 0, 0.5) 147.5%,
      transparent 150%
    );
    -webkit-mask-image: radial-gradient(
      circle at var(--theme-x, 50%) var(--theme-y, 50%),
      black 0%,
      black 145%,
      rgba(0, 0, 0, 0.5) 147.5%,
      transparent 150%
    );
  }
  100% {
    opacity: 0;
  }
}

/* Add smooth transitions to all theme-aware elements */
.navbar,
.hero,
.post-preview,
.tag,
.pagination-link,
footer,
.post-image,
.github-badges,
.btn,
article pre,
article code,
article blockquote,
.home-intro,
.page-intro,
.archive-item,
.comments-section,
.related-posts,
.social-link,
.photo-item {
  transition: 
    background-color var(--transition-theme),
    color var(--transition-theme),
    border-color var(--transition-theme),
    box-shadow var(--transition-theme);
}

/* Stagger animations for a wave effect */
.post-preview:nth-child(1) { transition-delay: 0ms; }
.post-preview:nth-child(2) { transition-delay: 50ms; }
.post-preview:nth-child(3) { transition-delay: 100ms; }
.post-preview:nth-child(4) { transition-delay: 150ms; }
.post-preview:nth-child(5) { transition-delay: 200ms; }

.tag:nth-child(1) { transition-delay: 0ms; }
.tag:nth-child(2) { transition-delay: 30ms; }
.tag:nth-child(3) { transition-delay: 60ms; }
.tag:nth-child(4) { transition-delay: 90ms; }
.tag:nth-child(5) { transition-delay: 120ms; }

/* Theme toggle icon transitions */
.theme-icon-dark,
.theme-icon-light {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: 
    opacity var(--transition-base),
    transform var(--transition-base);
}

/* Light mode - show moon icon */
html[data-theme="light"] .theme-icon-dark {
  opacity: 1;
  transform: translate(-50%, -50%) rotate(0deg);
}

html[data-theme="light"] .theme-icon-light {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(180deg) scale(0.5);
}

/* Dark mode - show sun icon */
html[data-theme="dark"] .theme-icon-dark {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(-180deg) scale(0.5);
}

html[data-theme="dark"] .theme-icon-light {
  opacity: 1;
  transform: translate(-50%, -50%) rotate(0deg);
}

/* Default for no data-theme (follows system preference) */
@media (prefers-color-scheme: light) {
  html:not([data-theme]) .theme-icon-dark {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
  }
  
  html:not([data-theme]) .theme-icon-light {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(180deg) scale(0.5);
  }
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) .theme-icon-dark {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-180deg) scale(0.5);
  }
  
  html:not([data-theme]) .theme-icon-light {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
  }
}

/* Skip to main content link for accessibility */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 10000;
  display: none;
}

.skip-to-main:hover {
  top: 0;
}