/**
 * Main Stylesheet - KodeHelp Theme v3.0
 * Modern Editorial Design
 */

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 999;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px dotted var(--color-border);
    transition: box-shadow var(--duration-base) var(--ease-out),
                border-color var(--duration-base) var(--ease-out);
}

.site-header.scrolled {
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--color-border);
}

.header-container {
    max-width: var(--width-full);
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-8);
}

/* Site Logo */
.site-branding {
    flex-shrink: 0;
}

.site-logo-wrapper {
    display: flex;
    align-items: center;
}

.site-logo-link {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.site-logo-link:hover {
    opacity: 0.85;
}

.site-logo-text {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 400;
    color: var(--color-accent);
    text-transform: uppercase;
}

.custom-logo-wrapper img,
.custom-logo-link img {
    max-height: 36px;
    width: auto;
}

/* Navigation */
.main-navigation {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.primary-menu-container ul {
    display: flex;
    list-style: none;
    gap: var(--space-1);
    margin: 0;
    padding: 0;
}

.primary-menu-container li {
    margin: 0;
    position: relative;
}

.primary-menu-container a {
    font-family: var(--font-heading);
    font-size: 0.75em;
    font-weight: 600;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--color-ink-light);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    display: block;
    transition: all var(--duration-fast) var(--ease-out);
    white-space: nowrap;
}

.primary-menu-container a:hover {
    color: var(--color-accent-text);
    background-color: var(--color-accent-light);
}

.primary-menu-container .current-menu-item > a,
.primary-menu-container .current_page_item > a {
    color: var(--color-accent-text);
    background-color: var(--color-accent-light);
    font-weight: 600;
}

/* Submenu */
.primary-menu-container .sub-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2);
    padding-top: calc(var(--space-2) + 8px);
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

/* Bridge the gap between parent item and submenu to prevent hover loss */
.primary-menu-container .menu-item-has-children > .sub-menu::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 0;
    right: 0;
    height: 8px;
}

.primary-menu-container li:hover > .sub-menu {
    display: block;
    animation: fadeSlideDown var(--duration-base) var(--ease-out);
}

.primary-menu-container .sub-menu a {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
}

.primary-menu-container .sub-menu a:hover {
    background-color: var(--color-accent-light);
}

@keyframes fadeSlideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Header Action Buttons */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.header-action-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    color: var(--color-ink-light);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.header-action-btn:hover {
    background-color: var(--color-surface-sunken);
    color: var(--color-accent);
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background var(--duration-fast) var(--ease-out);
}

.menu-toggle:hover {
    background-color: var(--color-surface-sunken);
}

.menu-toggle-icon {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 20px;
}

.menu-toggle-icon span {
    display: block;
    height: 2px;
    background-color: var(--color-ink);
    border-radius: 2px;
    transition: all var(--duration-base) var(--ease-out);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon span:nth-child(2) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Search Modal */
.search-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 10000;
    background-color: rgba(26, 26, 46, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
}

.search-modal.active {
    display: flex;
    animation: fadeIn var(--duration-base) var(--ease-out);
}

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

.search-modal-content {
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    max-width: 600px;
    width: 90%;
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--duration-slow) var(--ease-spring);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.search-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.search-modal-header h3 {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 600;
    margin: 0;
    color: var(--color-ink);
}

.search-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background-color: var(--color-surface-sunken);
    border-radius: var(--radius-md);
    color: var(--color-ink-muted);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    font-size: 1.2rem;
}

.search-close:hover {
    background-color: var(--color-border);
    color: var(--color-ink);
}

.search-form {
    display: flex;
    gap: var(--space-3);
}

.search-field {
    flex: 1;
    font-family: var(--font-heading);
    font-size: var(--text-base);
    padding: var(--space-3) var(--space-5);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background-color: var(--color-surface);
    color: var(--color-ink);
    outline: none;
    transition: all var(--duration-fast) var(--ease-out);
}

.search-field:focus {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.search-field::placeholder {
    color: var(--color-ink-muted);
}

.search-submit {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: var(--text-sm);
    padding: var(--space-3) var(--space-6);
    background-color: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.search-submit:hover {
    background-color: var(--color-accent-hover);
}

/* Search Suggestions */
.search-suggestions {
    margin-top: var(--space-6);
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-border);
}

.search-suggestions h4 {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-ink-muted);
    margin-bottom: var(--space-3);
}

.search-suggestion-list {
    list-style: none;
    margin: 0 0 var(--space-5);
    padding: 0;
}

.search-suggestion-list li {
    margin: 0;
}

.search-suggestion-list a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    color: var(--color-ink-light);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    transition: all var(--duration-fast) var(--ease-out);
}

.search-suggestion-list a:hover {
    background-color: var(--color-accent-light);
    color: var(--color-accent-text);
}

.search-suggestion-list a::before {
    content: '';
    width: 14px;
    height: 14px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2'%3E%3Cpolyline points='1 4 1 10 7 10'/%3E%3Cpath d='M3.51 15a9 9 0 1 0 2.13-9.36L1 10'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    flex-shrink: 0;
}

.search-popular-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.search-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-ink-light);
    background-color: var(--color-surface-sunken);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    transition: all var(--duration-fast) var(--ease-out);
}

.search-tag:hover {
    background-color: var(--color-accent);
    color: #ffffff;
}

/* ==========================================================================
   Hero Section (Front Page)
   ========================================================================== */

.hero-section {
    padding: var(--space-16) 0 var(--space-12);
}

.hero-article {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.hero-category .category-badge {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    text-decoration: none;
    letter-spacing: var(--tracking-wide);
    color: var(--color-accent-text);
    background-color: var(--color-accent-light);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    transition: all var(--duration-fast) var(--ease-out);
}

.hero-category .category-badge:hover {
    background-color: var(--color-accent);
    color: #ffffff;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 600;
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    margin: 0;
}

.hero-title a {
    color: var(--color-ink);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

.hero-title a:hover {
    color: var(--color-accent-text);
}

.hero-excerpt {
    font-size: var(--text-lg);
    color: var(--color-ink-light);
    line-height: var(--leading-snug);
    margin: 0;
}

.hero-meta {
    padding-top: var(--space-4);
}

.hero-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 16 / 10;
    box-shadow: var(--shadow-lg);
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
}

.hero-image:hover img {
    transform: scale(1.03);
}

/* Author Meta */
.author-meta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.author-meta img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 2px solid var(--color-border-light);
}

.author-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.author-name {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-ink);
}

a.author-name:hover {
    color: var(--color-accent);
}

.post-meta-info {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
}

.meta-separator {
    color: var(--color-border);
}

.reading-time {
    color: var(--color-ink-muted);
}

/* ==========================================================================
   Articles Grid (Front Page)
   ========================================================================== */

.articles-section {
    padding: var(--space-8) 0 var(--space-16);
    border-top: 1px solid var(--color-border-light);
}

.section-title {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-ink-muted);
    margin: 0;
    padding: var(--space-8) 0 var(--space-6);
}

.articles-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* Article Card (list style like Medium) */
.article-card {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-8);
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-border-light);
    transition: background-color var(--duration-fast) var(--ease-out);
}

.article-card:first-child {
    border-top: none;
}

.article-card.is-read {
    position: relative;
}

.article-card.is-read .article-title a {
    color: var(--color-ink-muted);
}

.article-card.is-read::after {
    content: 'Read';
    position: absolute;
    top: var(--space-8);
    right: 0;
    font-family: var(--font-heading);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-success, #10b981);
    background-color: rgba(16, 185, 129, 0.08);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.article-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    min-width: 0;
}

.article-category .category-link {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    text-decoration: none;
    letter-spacing: var(--tracking-wide);
    color: var(--color-accent-text);
    background-color: var(--color-accent-light);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    transition: all var(--duration-fast) var(--ease-out);
}

.article-category .category-link:hover {
    background-color: var(--color-accent);
    color: #ffffff;
}

.article-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    line-height: var(--leading-tight);
    margin: 0;
}

.article-title a {
    color: var(--color-ink);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

.article-title a:hover {
    color: var(--color-accent);
}

.article-excerpt {
    font-size: var(--text-sm);
    color: var(--color-ink-light);
    line-height: var(--leading-snug);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding-top: var(--space-2);
}

.author-meta-small {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.author-meta-small img {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.author-meta-small .author-name {
    font-size: var(--text-xs);
    font-weight: 500;
}

.author-meta-small .author-name a {
    color: var(--color-ink);
}

.author-meta-small .author-name a:hover {
    color: var(--color-accent);
}

.article-info {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
}

.article-image {
    flex-shrink: 0;
    width: 180px;
    height: 120px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
}

.article-image:hover img {
    transform: scale(1.05);
}

/* Load More Button */
.load-more-container {
    display: flex;
    justify-content: center;
    padding: var(--space-12) 0;
}

.load-more-btn {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    padding: var(--space-3) var(--space-8);
    background-color: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--duration-base) var(--ease-out);
}

.load-more-btn:hover {
    background-color: var(--color-accent);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.load-more-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ==========================================================================
   Post Cards (index, archive)
   ========================================================================== */

.posts-container {
    padding: var(--space-12) 0;
    max-width: var(--width-wide);
    margin: 0 auto;
}

.post-card {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--space-8);
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-border-light);
    align-items: start;
}

.post-card:last-of-type {
    border-bottom: none;
}

.post-thumbnail {
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

.post-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
}

.post-thumbnail:hover img {
    transform: scale(1.04);
}

.post-card-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.post-card-content .post-info .category-link {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    text-decoration: none;
    letter-spacing: var(--tracking-wide);
    color: var(--color-accent-text);
    background-color: var(--color-accent-light);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    transition: all var(--duration-fast) var(--ease-out);
}

.post-card-content .post-info .category-link:hover {
    background-color: var(--color-accent);
    color: #ffffff;
}

.post-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    line-height: var(--leading-tight);
    margin: 0;
}

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

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

.post-excerpt {
    font-size: var(--text-sm);
    color: var(--color-ink-light);
    line-height: var(--leading-snug);
}

.post-excerpt p {
    margin: 0;
}

.post-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-3);
}

.post-meta .post-info {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
}

/* ==========================================================================
   Single Post
   ========================================================================== */

.single-post {
    font-size: 120%;
}

.single-post .entry-header {
    padding: var(--space-16) 0 var(--space-8);
    text-align: center;
}

.entry-header-content {
    max-width: var(--width-content);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-5);
}

.entry-categories {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    justify-content: center;
}

.category-badge {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    text-decoration: none;
    letter-spacing: var(--tracking-wide);
    color: var(--color-accent);
    background-color: var(--color-accent-light);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    transition: all var(--duration-fast) var(--ease-out);
}

.category-badge:hover {
    background-color: var(--color-accent);
    color: #ffffff;
}

.entry-title {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 600;
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    margin: 0;
    max-width: 800px;
}

.entry-header .entry-meta {
    padding-top: var(--space-4);
}

.entry-header .author-meta {
    justify-content: center;
}

.entry-header .author-meta img {
    width: 48px;
    height: 48px;
}

/* Featured Image */
/* Series Navigation */
.series-nav {
    max-width: var(--width-content);
    margin: 0 auto var(--space-8);
    padding: var(--space-6);
    background-color: var(--color-accent-light);
    border-left: 3px solid var(--color-accent);
    border-radius: var(--radius-md);
}

.series-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.series-nav-label {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-accent-text);
}

.series-nav-count {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-ink-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.series-nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: series;
}

.series-nav-item {
    counter-increment: series;
    padding: var(--space-2) 0;
    font-size: var(--text-sm);
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
}

.series-nav-item::before {
    content: counter(series) ".";
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-ink-muted);
    min-width: 1.5em;
}

.series-nav-item a {
    color: var(--color-accent-text);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

.series-nav-item a:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

.series-nav-item.current {
    font-weight: 600;
}

.series-nav-current {
    color: var(--color-ink);
}

.entry-featured-image {
    max-width: var(--width-wide);
    margin: 0 auto var(--space-12);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.entry-featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Entry Content */
.entry-content {
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    padding: 0 var(--space-6);
}

.entry-content h2 {
    margin-top: 2.5em;
    padding-top: var(--space-4);
}

.entry-content h3 {
    margin-top: 2em;
}

.entry-content h2,
.entry-content h3 {
    position: relative;
}

.heading-anchor {
    display: inline-flex;
    align-items: center;
    margin-left: var(--space-2);
    color: var(--color-ink-muted);
    opacity: 0;
    text-decoration: none !important;
    vertical-align: middle;
    transition: opacity var(--duration-fast) var(--ease-out),
                color var(--duration-fast) var(--ease-out);
}

.entry-content h2:hover .heading-anchor,
.entry-content h3:hover .heading-anchor,
.heading-anchor:focus {
    opacity: 1;
}

.heading-anchor:hover {
    color: var(--color-accent);
}

.entry-content a {
    text-decoration: none;
    padding: 1px 3px;
    margin: -1px -3px;
    border-radius: 3px;
    transition: background-color var(--duration-fast) var(--ease-out),
                color var(--duration-fast) var(--ease-out);
}

.entry-content a:hover {
    background-color: var(--color-accent-light);
    color: var(--color-accent);
}

.entry-content img {
    border-radius: var(--radius-lg);
    margin: var(--space-8) 0;
}

/* Entry Footer */
.entry-footer {
    max-width: 1100px;
    margin: var(--space-8) auto 0;
    padding: var(--space-10) var(--space-6);
    border-top: 1px solid var(--color-border-light);
}

.entry-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-8);
}

.tags-title {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-ink-muted);
}

.entry-tags a,
.entry-tags a:visited {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-ink-light);
    background-color: var(--color-surface-sunken);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    transition: all var(--duration-fast) var(--ease-out);
    text-decoration: none;
}

.entry-tags a:hover {
    background-color: var(--color-accent);
    color: #ffffff;
    text-decoration: none;
}

/* Share Section */
.entry-share {
    padding: var(--space-8) var(--space-6);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.share-title {
    display: block;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-ink-muted);
    margin-bottom: var(--space-4);
    text-align: center;
}

.share-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    background-color: transparent;
    color: var(--color-ink-light);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    text-decoration: none;
    line-height: 1;
}

.share-btn svg {
    flex-shrink: 0;
}

.share-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Platform-specific branded hover styles */
.share-btn-x:hover {
    background-color: #000000;
    border-color: #000000;
    color: #ffffff;
}

.share-btn-linkedin:hover {
    background-color: #0077b5;
    border-color: #0077b5;
    color: #ffffff;
}

.share-btn-reddit:hover {
    background-color: #ff4500;
    border-color: #ff4500;
    color: #ffffff;
}

.share-btn-hackernews:hover {
    background-color: #ff6600;
    border-color: #ff6600;
    color: #ffffff;
}

.share-btn-copy:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: #ffffff;
}

.share-btn-copy.copied {
    background-color: var(--color-success);
    border-color: var(--color-success);
    color: #ffffff;
}

.share-btn-native:hover {
    background-color: var(--color-ink);
    border-color: var(--color-ink);
    color: #ffffff;
}

/* Bookmark Button */
.bookmark-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-ink-muted);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    flex-shrink: 0;
    margin-left: auto;
}

.bookmark-btn:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.bookmark-btn.bookmarked {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background-color: var(--color-accent-light);
}

.article-meta {
    display: flex;
    align-items: center;
}

/* ==========================================================================
   Author Bio
   ========================================================================== */

.author-bio {
    margin-top: var(--space-12);
    padding: var(--space-8);
    background-color: var(--color-surface-raised);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
}

.author-bio-content {
    display: flex;
    gap: var(--space-6);
    align-items: flex-start;
}

.author-avatar img {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 3px solid var(--color-border-light);
}

.author-bio-text {
    flex: 1;
}

.author-bio-name {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 600;
    margin: 0 0 var(--space-2) 0;
}

.author-bio-name a {
    color: var(--color-ink);
    text-decoration: none;
}

.author-bio-name a:hover {
    color: var(--color-accent);
}

.author-bio-description {
    font-size: var(--text-sm);
    color: var(--color-ink-light);
    line-height: var(--leading-snug);
    margin: 0;
}

.author-social-links {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.author-social-link {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background-color: var(--color-surface);
    color: var(--color-ink-muted);
    border: 1px solid var(--color-border);
    transition: all var(--duration-fast) var(--ease-out);
}

.author-social-link:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: #ffffff;
}

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

.post-navigation {
    max-width: 1100px;
    margin: var(--space-12) auto;
    padding: 0 var(--space-6);
}

.post-navigation .nav-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.nav-previous a,
.nav-next a {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-6);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--duration-base) var(--ease-out);
}

.nav-previous a:hover,
.nav-next a:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

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

.nav-subtitle {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-ink-muted);
}

.nav-title {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-ink);
    line-height: var(--leading-snug);
}

/* ==========================================================================
   Comments
   ========================================================================== */

.comments-wrapper {
    padding: 0 var(--space-6);
}

.comments-area {
    padding-top: var(--space-12);
    border-top: 1px solid var(--color-border-light);
    content-visibility: auto;
    contain-intrinsic-size: auto 800px;
}

.comments-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: 0 0 var(--space-8) 0;
    color: var(--color-ink);
}

.comments-title svg {
    color: var(--color-accent);
}

.comment-count {
    color: var(--color-accent);
}

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

.comment-list li {
    margin-bottom: var(--space-6);
}

.comment-body {
    padding: var(--space-6);
    background-color: var(--color-surface-raised);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    transition: box-shadow var(--duration-fast) var(--ease-out);
}

.comment-body:hover {
    box-shadow: var(--shadow-sm);
}

.comment-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.comment-author-avatar img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
}

.comment-meta-wrapper {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.comment-author-info {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.comment-author-info .fn,
.comment-author-info .fn a {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-ink);
    text-decoration: none;
}

.comment-meta-separator {
    color: var(--color-border);
    font-size: var(--text-xs);
}

.comment-date {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
    text-decoration: none;
}

.comment-date:hover {
    color: var(--color-accent);
}

.comment-author-badge {
    font-family: var(--font-heading);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    background-color: var(--color-accent-light);
    color: var(--color-accent);
    padding: 1px var(--space-2);
    border-radius: var(--radius-full);
}

.comment-content {
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--color-ink-light);
}

.comment-content p:last-child {
    margin-bottom: 0;
}

.comment-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-4);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border-light);
}

.comment-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.comment-like-btn {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out);
}

.comment-like-btn:hover {
    color: var(--color-error);
    background-color: rgba(225, 112, 85, 0.08);
}

.comment-like-btn.liked {
    color: var(--color-error);
}

.comment-replies-count {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
}

.comment-reply-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-accent);
    text-decoration: none;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out);
}

.comment-reply-link:hover {
    background-color: var(--color-accent-light);
}

.comment-list .children {
    margin-left: var(--space-8);
    padding-left: var(--space-6);
    border-left: 2px solid var(--color-accent-light);
}

/* Comment Form */
.comment-respond {
    margin-top: var(--space-10);
    padding: var(--space-8);
    background-color: var(--color-surface-raised);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
}

.comment-reply-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    margin: 0 0 var(--space-6) 0;
    color: var(--color-ink);
}

.comment-form label {
    display: block;
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--space-2);
}

.comment-form .required {
    color: var(--color-error);
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
    width: 100%;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-surface);
    color: var(--color-ink);
    transition: all var(--duration-fast) var(--ease-out);
    outline: none;
}

.comment-form input:focus,
.comment-form textarea:focus {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.comment-form input::placeholder,
.comment-form textarea::placeholder {
    color: var(--color-ink-muted);
}

.comment-form p {
    margin-bottom: var(--space-5);
}

.submit-button,
.comment-form .form-submit .submit {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    padding: var(--space-3) var(--space-8);
    background-color: var(--color-accent);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--duration-base) var(--ease-out);
}

.submit-button:hover,
.comment-form .form-submit .submit:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.comment-awaiting-moderation {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    color: var(--color-warning);
    background-color: rgba(253, 203, 110, 0.1);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
}

.no-comments {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    color: var(--color-ink-muted);
    text-align: center;
    padding: var(--space-8);
}

/* ==========================================================================
   Related Posts
   ========================================================================== */

.related-posts {
    max-width: var(--width-wide);
    margin: var(--space-16) auto;
    padding: 0 var(--space-6);
    content-visibility: auto;
    contain-intrinsic-size: auto 500px;
}

.related-posts-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    margin: 0 0 var(--space-8) 0;
    color: var(--color-ink);
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.related-post-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    transition: all var(--duration-base) var(--ease-out);
    text-decoration: none;
}

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

.related-post-thumbnail {
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.related-post-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
}

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

.related-post-content {
    padding: var(--space-5);
}

.related-post-content h3 {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: var(--leading-snug);
    color: var(--color-ink);
    margin: 0;
}

/* ==========================================================================
   Page Template
   ========================================================================== */

.page .entry-header {
    padding: var(--space-16) 0 var(--space-8);
    text-align: center;
}

.page .entry-title {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 600;
    margin: 0;
}

.page .entry-content {
    padding: 0 var(--space-6) var(--space-16);
}

/* ==========================================================================
   Archive / Category Pages
   ========================================================================== */

.page-header {
    padding: var(--space-16) 0 var(--space-8);
    text-align: center;
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: var(--space-4);
}

.page-title {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: 600;
    color: var(--color-ink);
    margin: 0 0 var(--space-3) 0;
}

.archive-description {
    font-size: var(--text-base);
    color: var(--color-ink-light);
    max-width: var(--width-content);
    margin: 0 auto;
}

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

.pagination,
.posts-container .nav-links {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-10) 0;
}

.page-numbers {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-ink-light);
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-out);
    border: 1px solid var(--color-border-light);
    padding: 0 var(--space-3);
}

.page-numbers:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.page-numbers.current {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: #ffffff;
}

.page-numbers.prev,
.page-numbers.next {
    padding: 0 var(--space-4);
}

/* ==========================================================================
   Search Results
   ========================================================================== */

.search-header {
    text-align: center;
    padding: var(--space-16) 0 var(--space-8);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-8);
}

.search-header .page-title {
    font-size: var(--text-3xl);
    margin: 0 0 var(--space-4);
}

.search-query {
    color: var(--color-accent);
}

.search-results-count {
    color: var(--color-ink-muted);
    font-size: var(--text-sm);
    margin-bottom: var(--space-6);
}

.search-again {
    max-width: 500px;
    margin: 0 auto;
}

.search-result-card {
    display: flex;
    gap: var(--space-6);
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border-light);
    align-items: flex-start;
}

.search-result-content {
    flex: 1;
    min-width: 0;
}

.search-result-card .post-thumbnail {
    flex-shrink: 0;
    width: 160px;
}

.search-result-card .post-thumbnail img {
    border-radius: var(--radius-md);
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

.search-result-type {
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
    text-transform: uppercase;
    margin-left: var(--space-2);
}

.search-result-excerpt {
    color: var(--color-ink-light);
    font-size: var(--text-sm);
    margin-bottom: var(--space-3);
}

.search-result-excerpt p {
    margin-bottom: 0;
}

mark.search-highlight {
    background-color: var(--color-accent-light);
    color: var(--color-accent);
    padding: 0.1em 0.25em;
    border-radius: 3px;
}

.no-results {
    text-align: center;
    padding: var(--space-20) 0;
}

.no-results-content svg {
    margin-bottom: var(--space-6);
    opacity: 0.5;
}

.no-results h2 {
    margin-top: 0;
    margin-bottom: var(--space-4);
}

.no-results p {
    color: var(--color-ink-muted);
    max-width: 480px;
    margin: 0 auto var(--space-8);
}

/* ==========================================================================
   404 Page
   ========================================================================== */

.error-404 {
    text-align: center;
    padding: var(--space-24) var(--space-6);
}

.error-404-content {
    max-width: 500px;
    margin: 0 auto var(--space-16);
}

.error-404-title {
    font-family: var(--font-display);
    font-size: 8rem;
    font-weight: 400;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: var(--space-4);
    opacity: 0.3;
}

.error-404 h1 {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: 600;
    margin: 0 0 var(--space-4) 0;
}

.error-404 p {
    font-size: var(--text-base);
    color: var(--color-ink-light);
    margin-bottom: var(--space-8);
}

.error-404-search {
    max-width: 400px;
    margin: 0 auto var(--space-8);
}

.error-404-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.error-404-suggestions {
    max-width: var(--width-wide);
    margin: 0 auto;
}

.error-404-suggestions h2 {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    margin: 0 0 var(--space-8) 0;
}

.suggestions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.suggestion-card {
    display: block;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    text-decoration: none;
    transition: all var(--duration-base) var(--ease-out);
}

.suggestion-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.suggestion-thumbnail {
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

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

.suggestion-card h3 {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    padding: var(--space-4) var(--space-5);
    color: var(--color-ink);
    margin: 0;
    line-height: var(--leading-snug);
}

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

.site-footer {
    background-color: var(--color-ink);
    color: rgba(255, 255, 255, 0.7);
    margin-top: auto;
    content-visibility: auto;
    contain-intrinsic-size: auto 400px;
}

.footer-container {
    max-width: var(--width-full);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    padding: var(--space-16) 0;
}

.footer-brand .footer-logo {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: #ffffff;
    text-decoration: none;
    display: inline-block;
    margin-bottom: var(--space-4);
}

.footer-brand p {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.5);
    line-height: var(--leading-snug);
    max-width: 320px;
}

.footer-column h4 {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    color: #ffffff;
    margin: 0 0 var(--space-5) 0;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

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

.footer-column li {
    margin-bottom: var(--space-3);
}

.footer-column a {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

.footer-column a:hover {
    color: #ffffff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--space-6) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-info {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.35);
}

.site-info a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
}

.site-info a:hover {
    color: #ffffff;
}

.site-info p {
    margin: 0;
}

/* ==========================================================================
   Reading Progress Bar
   ========================================================================== */

.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 10000;
    background: transparent;
}

.reading-progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
    transition: width 100ms linear;
    border-radius: 0 2px 2px 0;
}

/* ==========================================================================
   Code Copy Button
   ========================================================================== */

.code-copy-button {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    padding: var(--space-1) var(--space-3);
    background-color: var(--color-surface);
    color: var(--color-ink-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    opacity: 0;
    transition: all var(--duration-fast) var(--ease-out);
}

.code-copy-button svg {
    flex-shrink: 0;
}

pre:hover .code-copy-button {
    opacity: 1;
}

.code-copy-button:hover {
    background-color: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
}

.code-copy-button.copied {
    background-color: var(--color-success);
    color: #ffffff;
    border-color: var(--color-success);
}

/* ==========================================================================
   Breadcrumbs
   ========================================================================== */

.breadcrumbs {
    padding: var(--space-4) 0;
    max-width: var(--width-content);
    margin: 0 auto;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    padding: 0;
    margin: 0;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
}

.breadcrumb-item a {
    color: var(--color-ink-muted);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    color: var(--color-accent);
}

.breadcrumb-separator {
    color: var(--color-border);
}

.breadcrumb-item.active {
    color: var(--color-ink-light);
    font-weight: 500;
}

/* ==========================================================================
   Widgets
   ========================================================================== */

.widget {
    padding: var(--space-6);
    background-color: var(--color-surface-raised);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    margin-bottom: var(--space-6);
}

.widget-title {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-ink);
    margin: 0 0 var(--space-4) 0;
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--color-accent);
}

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

.widget li {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border-light);
    margin: 0;
}

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

.widget a {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    color: var(--color-ink);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

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

/* ==========================================================================
   No Posts Found
   ========================================================================== */

.no-results {
    text-align: center;
    padding: var(--space-20) var(--space-6);
}

.no-results h1 {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.no-results p {
    color: var(--color-ink-light);
    margin-bottom: var(--space-8);
}

/* ==========================================================================
   Table of Contents
   ========================================================================== */

.toc-container {
    background-color: var(--color-surface-raised);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-8);
}

.toc-title {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-ink);
    margin: 0 0 var(--space-4) 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

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

.toc-list li {
    margin-bottom: var(--space-1);
}

.toc-list a {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    color: var(--color-ink-light);
    text-decoration: none;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    display: block;
    transition: all var(--duration-fast) var(--ease-out);
    border-left: 2px solid transparent;
}

.toc-list a:hover,
.toc-list a.active {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
    border-left-color: var(--color-accent);
}

.toc-list .toc-h3 {
    padding-left: var(--space-6);
}

.toc-list .toc-h4 {
    padding-left: var(--space-10);
}

/* ==========================================================================
   Skip to content link
   ========================================================================== */

.skip-link {
    background-color: var(--color-accent);
    color: #ffffff;
    font-family: var(--font-heading);
    font-weight: 600;
    padding: var(--space-3) var(--space-6);
    position: fixed;
    top: -100%;
    left: var(--space-4);
    z-index: 99999;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
    top: 0;
    clip: auto !important;
    height: auto;
    width: auto;
}

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

@media (max-width: 1024px) {
    .hero-article {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-image {
        order: -1;
    }

    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }

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

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

    .post-card {
        grid-template-columns: 200px 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --text-4xl: 2.25rem;
        --text-3xl: 1.875rem;
        --text-2xl: 1.5rem;
        --header-height: 60px;
    }

    .header-container {
        padding: 0 var(--space-4);
    }

    /* Mobile menu */
    .menu-toggle {
        display: flex;
    }

    .primary-menu-container {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-surface);
        padding: var(--space-6);
        z-index: 999;
        overflow-y: auto;
        border-top: 1px solid var(--color-border-light);
        transform: translateX(100%);
        transition: transform var(--duration-base) var(--ease-out);
        visibility: hidden;
    }

    .primary-menu-container.active {
        transform: translateX(0);
        visibility: visible;
    }

    .primary-menu-container ul {
        flex-direction: column;
        gap: 0;
    }

    .primary-menu-container a {
        font-size: var(--text-base);
        padding: var(--space-4);
        border-radius: var(--radius-md);
    }

    .primary-menu-container .sub-menu {
        position: static;
        display: none;
        box-shadow: none;
        border: none;
        padding: 0;
        margin: 0;
        padding-left: var(--space-4);
        background: transparent;
    }

    .primary-menu-container .submenu-open > .sub-menu {
        display: block;
    }

    .primary-menu-container .sub-menu a {
        font-size: var(--text-sm);
        color: var(--color-ink-light);
    }

    .site-container {
        padding: 0 var(--space-4);
    }

    .hero-section {
        padding: var(--space-8) 0 var(--space-6);
    }

    .hero-title {
        font-size: var(--text-2xl);
    }

    .hero-excerpt {
        font-size: var(--text-base);
    }

    .article-card {
        gap: var(--space-4);
        padding: var(--space-6) 0;
    }

    .article-image {
        width: 100px;
        height: 70px;
    }

    .article-title {
        font-size: var(--text-base);
    }

    .article-excerpt {
        display: none;
    }

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

    .post-thumbnail {
        aspect-ratio: 16 / 9;
    }

    .entry-title {
        font-size: var(--text-2xl);
    }

    .entry-featured-image {
        border-radius: var(--radius-lg);
        margin-bottom: var(--space-8);
    }

    .entry-content {
        padding: 0 var(--space-4);
    }

    .entry-footer {
        padding: var(--space-6) var(--space-4);
    }

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

    .author-bio-content {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .author-social-links {
        justify-content: center;
    }

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

    .suggestions-grid {
        grid-template-columns: 1fr;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .error-404-title {
        font-size: 5rem;
    }

    .comments-wrapper {
        padding: 0 var(--space-4);
    }

    .comment-list .children {
        margin-left: var(--space-4);
        padding-left: var(--space-4);
    }

    .share-buttons {
        gap: var(--space-2);
    }

    .share-btn span {
        display: none;
    }

    .share-btn {
        padding: 10px;
        border-radius: 50%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --text-4xl: 1.875rem;
        --text-3xl: 1.5rem;
    }

    .article-image {
        width: 80px;
        height: 56px;
    }

    .author-bio {
        padding: var(--space-5);
    }

    .comment-body {
        padding: var(--space-4);
    }

    .comment-respond {
        padding: var(--space-5);
    }
}

/* ==========================================================================
   Code Language Label
   ========================================================================== */

.code-lang-label {
    position: absolute;
    top: 0;
    left: var(--space-4);
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 2px 10px 3px;
    background-color: var(--color-accent);
    color: #ffffff;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    line-height: 1.4;
}

/* ==========================================================================
   Back to Top Button
   ========================================================================== */

.back-to-top {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface);
    color: var(--color-ink-light);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--duration-base) var(--ease-out);
    z-index: 90;
}

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

.back-to-top:hover {
    background-color: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */

.kh-toast {
    position: fixed;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 500;
    padding: var(--space-3) var(--space-5);
    background-color: var(--color-ink);
    color: #ffffff;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: opacity var(--duration-base) var(--ease-out),
                transform var(--duration-base) var(--ease-out);
    z-index: 10001;
    white-space: nowrap;
}

.kh-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.kh-toast svg {
    color: var(--color-success);
    flex-shrink: 0;
}

/* ==========================================================================
   Article Table of Contents (Sticky Right Sidebar)
   ========================================================================== */

.article-toc-layout {
    display: flex;
    gap: var(--space-8);
    max-width: calc(var(--width-content) + 280px);
    margin: 0 auto;
    position: relative;
}

.article-toc-layout .entry-content {
    flex: 1;
    min-width: 0;
    max-width: var(--width-content);
}

.article-toc-sidebar {
    width: 240px;
    flex-shrink: 0;
}

.article-toc {
    position: sticky;
    top: calc(var(--header-height) + var(--space-6));
    max-height: calc(100vh - var(--header-height) - var(--space-12));
    overflow-y: auto;
    padding: var(--space-4);
    border-left: 1px solid var(--color-border);
}

/* Custom scrollbar for TOC */
.article-toc::-webkit-scrollbar {
    width: 3px;
}

.article-toc::-webkit-scrollbar-track {
    background: transparent;
}

.article-toc::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.article-toc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
}

.article-toc-title {
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-ink-muted);
}

.article-toc-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: none;
    border: none;
    color: var(--color-ink-muted);
    cursor: pointer;
    transition: color var(--duration-fast) var(--ease-out);
    padding: 0;
}

.article-toc-toggle:hover {
    color: var(--color-ink);
}

.article-toc-toggle[aria-expanded="false"] svg {
    transform: rotate(-90deg);
}

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

.article-toc-list.collapsed {
    display: none;
}

.article-toc-list li {
    counter-increment: toc-counter;
}

.article-toc-list li a {
    display: block;
    padding: 4px 0 4px var(--space-3);
    font-family: var(--font-heading);
    font-size: 12px;
    color: var(--color-ink-muted);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all var(--duration-fast) var(--ease-out);
    line-height: 1.4;
}

.article-toc-list li a:hover {
    color: var(--color-accent-text);
}

.article-toc-list li a.active {
    color: var(--color-accent-text);
    border-left-color: var(--color-accent);
    font-weight: 600;
}

.article-toc-list li.toc-sub a {
    padding-left: var(--space-6);
    font-size: 11px;
}

/* On screens too narrow for the sidebar, fall back to inline TOC above content */
@media (max-width: 1200px) {
    .article-toc-layout {
        display: block;
        max-width: var(--width-content);
    }

    .article-toc-sidebar {
        width: 100%;
        margin-bottom: var(--space-6);
    }

    .article-toc {
        position: static;
        max-height: none;
        overflow-y: visible;
        border-left: none;
        background-color: var(--color-surface-sunken);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-lg);
        padding: var(--space-5);
    }

    .article-toc-list li a {
        font-size: var(--text-sm);
        padding: var(--space-2) 0 var(--space-2) var(--space-3);
    }

    .article-toc-list li.toc-sub a {
        font-size: 13px;
        padding-left: var(--space-6);
    }
}

/* ==========================================================================
   Mobile Menu Animation
   ========================================================================== */

body.menu-open {
    overflow: hidden;
}

/* ==========================================================================
   Newsletter Widget
   ========================================================================== */

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

.newsletter-description {
    font-size: var(--text-sm);
    color: var(--color-ink-light);
    margin-bottom: var(--space-4);
}

.newsletter-form {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.newsletter-email {
    flex: 1;
    min-width: 0;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-surface);
    color: var(--color-ink);
    outline: none;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.newsletter-email:focus {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.newsletter-submit {
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    background-color: var(--color-accent);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-out);
    white-space: nowrap;
}

.newsletter-submit:hover {
    background-color: var(--color-accent-hover);
}

.newsletter-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.newsletter-message {
    width: 100%;
    font-size: var(--text-xs);
    margin-top: var(--space-2);
    text-align: left;
}

.newsletter-message.success {
    color: var(--color-success);
}

.newsletter-message.error {
    color: var(--color-error);
}

/* ==========================================================================
   Placeholder Image
   ========================================================================== */

.placeholder-img {
    width: 100%;
    height: auto;
    object-fit: cover;
    background-color: var(--color-surface-sunken);
    border-radius: var(--radius-md);
}

/* ==========================================================================
   Accessibility — Focus Styles
   ========================================================================== */

/* Global focus-visible ring for keyboard users */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm, 2px);
}

/* Remove outline on mouse click */
:focus:not(:focus-visible) {
    outline: none;
}

/* Enhanced focus for interactive elements */
.share-btn:focus-visible,
.bookmark-btn:focus-visible,
.back-to-top:focus-visible,
.dark-mode-toggle:focus-visible,
.header-action-btn:focus-visible,
.menu-toggle:focus-visible,
.load-more-btn:focus-visible,
.code-copy-button:focus-visible,
.code-playground-btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    box-shadow: var(--shadow-glow);
}

/* TOC links focus */
.article-toc-list a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 1px;
    border-radius: var(--radius-sm, 2px);
}

/* Skip link visible on focus */
.skip-link:focus {
    clip: auto !important;
    height: auto;
    width: auto;
    padding: var(--space-3) var(--space-6);
    background-color: var(--color-accent);
    color: #ffffff;
    font-weight: 600;
    z-index: 100000;
    top: var(--space-2);
    left: var(--space-2);
    border-radius: var(--radius-md);
}

/* ==========================================================================
   Reduced Motion — respect user preference
   ========================================================================== */

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

    .reading-progress-bar {
        transition: none !important;
    }
}

/* ==========================================================================
   Performance Hints
   ========================================================================== */

.site-header {
    will-change: box-shadow;
}

.reading-progress-bar {
    will-change: width;
}

.back-to-top {
    will-change: opacity, transform;
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .site-header,
    .site-footer,
    .entry-share,
    .post-navigation,
    .related-posts,
    .comments-area,
    .reading-progress,
    .dark-mode-toggle,
    .menu-toggle,
    .back-to-top,
    .kh-toast,
    .code-copy-button,
    .code-lang-label,
    .article-toc-sidebar {
        display: none !important;
    }

    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }

    a {
        color: #000;
    }

    .entry-content a {
        text-decoration: underline;
    }

    .entry-content a::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}