/**
 * Theme 2026 - Custom Styles
 * Minimalist WordPress theme with oat.ink UI
 * Uses oat.ink default theme variables - see https://oat.ink/customizing/
 */

/* ========================================
   CSS Variables - oat.ink Theme + Layout
   ======================================== */
:root {
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Typography - Larger fonts */
    --font-family: 'Athiti', system-ui, sans-serif;
    --heading-font-family: 'Athiti', system-ui, sans-serif;
    --body-font-family: 'Athiti', system-ui, sans-serif;
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-base: 1.125rem;
    --font-size-lg: 1.375rem;
    --font-size-xl: 1.625rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;

    /* Layout */
    --container-max: 1400px;
    --header-height: 70px;
    --content-gap: 20px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* Dark Mode - oat.ink style */
[data-theme="dark"] {
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* ========================================
   Base Styles
   ======================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font-family);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--foreground);
    background-color: var(--background);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--link-hover);
    text-decoration: none;
}

a:active {
    color: var(--link-active);
}

img {
    max-width: 100%;
    height: auto;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--heading-font-family);
    font-weight: 600;
    line-height: 1.35;
    margin: 0 0 var(--spacing-md);
}

/* ========================================
   Layout - Unified Container System
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-width, 1200px);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    box-sizing: border-box;
}

.site {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-content {
    flex: 1;
    width: 100%;
    padding: var(--spacing-xl) 0;
    background-color: var(--faint, rgb(248 249 250));
}

.site-content>.container {
    width: 100%;
    max-width: var(--container-width, 1200px);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    box-sizing: border-box;
}

/* Sidebar Layout - Flexbox */
.site-content.has-sidebar>.container {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--content-gap, 20px);
}

.site-content.has-sidebar.sidebar-left>.container {
    flex-direction: row-reverse;
}

.site-content.has-sidebar #primary {
    flex: 1 1 calc(var(--main-content-width, 70%) - var(--content-gap, 20px) / 2);
    max-width: calc(var(--main-content-width, 70%) - var(--content-gap, 20px) / 2);
    min-width: 0;
}

.site-content.has-sidebar #secondary {
    flex: 1 1 calc(var(--sidebar-width, 30%) - var(--content-gap, 20px) / 2);
    max-width: calc(var(--sidebar-width, 30%) - var(--content-gap, 20px) / 2);
    min-width: 0;
}

/* No sidebar - full width */
.site-content:not(.has-sidebar) #primary {
    width: 100%;
    max-width: 100%;
}

@media (max-width: 992px) {
    .site-content.has-sidebar>.container {
        flex-direction: column;
        flex-wrap: wrap;
    }

    .site-content.has-sidebar.sidebar-left>.container {
        flex-direction: column;
    }

    .site-content.has-sidebar #primary,
    .site-content.has-sidebar #secondary {
        flex: 1 1 100%;
        max-width: 100%;
        width: 100%;
    }
}

/* Homepage - Block layout */
.home .site-content:not(.has-sidebar),
.front-page .site-content:not(.has-sidebar) {
    display: block;
}

.home .site-content:not(.has-sidebar)>.container,
.front-page .site-content:not(.has-sidebar)>.container {
    display: block;
    max-width: var(--container-width, 1200px);
    width: 85%;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.home .site-content:not(.has-sidebar) #primary,
.front-page .site-content:not(.has-sidebar) #primary {
    max-width: 100%;
    width: 100%;
}

/* ========================================
   Breadcrumbs - Semantic HTML
   ======================================== */
.breadcrumbs {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.breadcrumbs li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.breadcrumbs li:not(:last-child)::after {
    content: "›";
    color: var(--muted-foreground);
}

.breadcrumbs a {
    color: var(--primary);
    text-decoration: none;
}

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

.breadcrumbs li:last-child {
    color: var(--foreground);
    font-weight: 500;
}


/* ========================================
   Header
   ======================================== */
.site-header {
    background-color: var(--card);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0;
    transition: height 0.3s ease, box-shadow 0.3s ease;
    height: 120px;
}

.site-header.scrolled {
    height: 60px;
    box-shadow: var(--shadow-md);
}

#page {
    padding-top: 120px;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: var(--spacing-lg);
    width: 85%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    transition: height 0.3s ease;
}

.site-header.scrolled .header-inner {
    height: 60px;
}

/* Container Alignment - Boxes (default) - Header and Content only */
.header-inner.container-alignment-boxes,
.site-content.container-alignment-boxes>.container {
    width: 85%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

/* Container Alignment - Text - Header and Content only */
.header-inner.container-alignment-text>* {
    width: 85%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.site-content.container-alignment-text>.container {
    width: 85%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

/* Mobile Header - Khoá cứng 60px, không có hiệu ứng thu nhỏ khi cuộn */
@media (max-width: 768px) {

    .site-header,
    .site-header.scrolled {
        height: 60px;
        transition: none;
    }

    #page {
        padding-top: 60px;
    }

    .header-inner,
    .site-header.scrolled .header-inner {
        height: 60px;
        padding: 0 var(--spacing-sm);
        width: 95%;
        transition: none;
    }

    .site-branding {
        flex: 1;
        min-width: 0;
        overflow: hidden;
    }

    .site-branding img,
    .site-header.scrolled .site-branding img {
        max-height: 20px;
        max-width: 50%;
        transition: none;
    }

    .site-branding .site-title {
        font-size: var(--font-size-md);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* Fix tỷ lệ Container trên Mobile (Full Width) */
    .site-content.container-alignment-boxes>.container,
    .site-content.container-alignment-text>.container {
        width: 100% !important;
        padding: 0 var(--spacing-sm) !important;
    }

    /* Ẩn hoàn toàn Sidebar trên Mobile */
    .site-content.has-sidebar #secondary {
        display: none !important;
    }

    /* Đảm bảo Primary content chiếm toàn bộ sau khi ẩn Sidebar */
    .site-content.has-sidebar #primary {
        flex: 1 1 100% !important;
        max-width: 100% !important;
        width: 100% !important;
    }

    /* Tối ưu typography và không gian hiển thị cho Single Page trên Mobile */
    .single .entry-title {
        font-size: var(--font-size-xl) !important;
        margin: var(--spacing-sm) 0 !important;
    }

    .single .entry-content {
        padding: 0 !important;
        background: transparent !important;
        border-radius: 0 !important;
    }

    .single .entry-content p {
        margin-bottom: var(--spacing-md) !important;
    }

    .single .featured-image {
        margin-bottom: 0 !important;
    }

    /* Ẩn bớt các mục phụ trong Entry Meta trên Mobile để tránh rối mắt */
    .single .entry-meta .meta-item.updated-on,
    .single .entry-meta .comments-link {
        display: none;
    }
}

.site-branding {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.site-branding img {
    max-height: 108px;
    width: auto;
    transition: max-height 0.3s ease;
}

.site-header.scrolled .site-branding img {
    max-height: 54px;
}

.site-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin: 0;
}

.site-title a {
    color: var(--foreground);
    text-decoration: none;
}

.site-description {
    font-size: var(--font-size-xs);
    color: var(--muted-foreground);
    margin: 0;
}

/* ========================================
   Navigation
   ======================================== */
.main-navigation {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

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

.nav-menu a {
    color: var(--foreground);
    padding: 8px 14px;
    display: block;
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-base);
    transition: color var(--transition-fast), background-color var(--transition-fast);
    border-radius: 6px;
}

.nav-menu a:hover {
    background-color: var(--muted);
}

.nav-menu a:hover,
.nav-menu .current-menu-item>a {
    color: var(--primary);
}

/* Submenu Dropdown - No border, positioned below nav */
.nav-menu li.menu-item-has-children {
    position: relative;
}

.nav-menu li.menu-item-has-children>a::after {
    content: '';
    display: inline-block;
    margin-left: 4px;
    border: 4px solid transparent;
    border-top-color: currentColor;
    vertical-align: middle;
}

.nav-menu ul.sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--card);
    min-width: 180px;
    padding: var(--spacing-xs) 0;
    list-style: none;
    margin: 4px 0 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition-fast);
    z-index: 200;
    box-shadow: var(--shadow-md);
    border-radius: 6px;
}

.nav-menu li.menu-item-has-children:hover>ul.sub-menu,
.nav-menu li.menu-item-has-children:focus-within>ul.sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu ul.sub-menu a {
    padding: 10px 16px;
    display: block;
    font-size: var(--font-size-sm);
    border-radius: 0;
}

.nav-menu ul.sub-menu a:hover {
    background-color: var(--muted);
}

.nav-menu ul.sub-menu ul {
    left: 100%;
    top: 0;
    margin-top: 0;
    margin-left: 8px;
}

/* ========================================
   Header Actions
   ======================================== */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
    position: relative;
}

.search-toggle,
.theme-toggle,
.mobile-menu-toggle,
.share-button {
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
    color: var(--foreground);
    border-radius: 6px;
    transition: background-color var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-toggle svg,
.theme-toggle svg,
.mobile-menu-toggle svg,
.share-button svg {
    width: 18px;
    height: 18px;
}

.search-toggle:hover,
.theme-toggle:hover,
.mobile-menu-toggle:hover,
.share-button:hover {
    background-color: var(--muted);
}

.theme-toggle {
    display: none;
}

/* Show toggle when dark mode is active (any page) */
[data-theme="dark"] .theme-toggle {
    display: flex;
}

/* Also show toggle on homepage when dark mode enabled via Customizer */
.home .theme-toggle,
.front-page .theme-toggle {
    display: flex;
}

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

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

[data-theme="light"] .theme-toggle .icon-moon,
:root:not([data-theme]) .theme-toggle .icon-moon {
    display: block;
}

/* Search Form */
.search-form {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--card);
    border-radius: 8px;
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    width: 280px;
    z-index: 200;
    margin-top: 4px;
}

.search-form.active {
    display: flex;
    gap: var(--spacing-xs);
}

.search-form input[type="search"] {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--background);
    color: var(--foreground);
    font-size: var(--font-size-sm);
}

.search-form input[type="search"]:focus {
    outline: none;
    border-color: var(--primary);
}

.search-form button {
    padding: 8px 12px;
    background: var(--primary);
    color: var(--primary-foreground);
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.search-form button svg {
    width: 16px;
    height: 16px;
}

/* Mobile Menu Toggle - Ẩn mặc định trên desktop */
.mobile-menu-toggle {
    display: none;
}

.mobile-menu-toggle .icon-close {
    display: none;
}

.mobile-menu-toggle.active .icon-menu {
    display: none;
}

.mobile-menu-toggle.active .icon-close {
    display: block;
}

/* ========================================
   Mobile Navigation - Responsive
   ======================================== */
@media (max-width: 768px) {

    /* Hiển thị nút hamburger */
    .mobile-menu-toggle {
        display: flex;
    }

    /* Ẩn menu desktop, chuyển sang vertical panel */
    .main-navigation {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card);
        border-top: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        z-index: 9999;
        max-height: 80vh;
        overflow-y: auto;
    }

    /* Khi toggle active, hiển thị menu */
    .main-navigation.active {
        display: block;
    }

    /* Menu vertical layout */
    .nav-menu {
        flex-direction: column;
        gap: 0;
    }

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

    .nav-menu>li:last-child {
        border-bottom: none;
    }

    .nav-menu a {
        padding: 14px 20px;
        border-radius: 0;
    }

    /* Submenu mobile - ẩn mặc định */
    .nav-menu ul.sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border-radius: 0;
        display: none;
        background: var(--faint, #f8f9fa);
        margin: 0;
        padding: 0;
    }

    /* Submenu hiển thị khi expanded */
    .nav-menu li.menu-item-has-children.expanded>ul.sub-menu {
        display: block;
    }

    .nav-menu ul.sub-menu a {
        padding: 12px 20px 12px 36px;
        font-size: var(--font-size-sm);
    }

    /* Menu item có children - mũi tên xổ xuống */
    .nav-menu li.menu-item-has-children>a::after {
        border: 5px solid transparent;
        border-left-color: currentColor;
        border-top-color: transparent;
        transition: transform 0.2s ease;
    }

    .nav-menu li.menu-item-has-children.expanded>a::after {
        transform: rotate(90deg);
    }

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

    .search-toggle,
    .theme-toggle,
    .mobile-menu-toggle {
        padding: 8px;
    }
}

/* ========================================
   Main Content
   ======================================== */
#primary {
    min-width: 0;
}

/* Homepage - centered content */
.home #primary,
.front-page #primary {
    width: 100%;
}

/* Full width template */
.page-template-full-width #primary {
    width: 100%;
    max-width: 100%;
}

/* No sidebar pages - centered */
.site-content:not(.has-sidebar) #primary {
    width: 100%;
}

@media (max-width: 768px) {
    #primary {
        width: 100%;
    }
}

/* ========================================
   Posts Grid - Dynamic Columns
   ======================================== */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

/* 1 Column */
.posts-grid[data-columns="1"] {
    grid-template-columns: 1fr;
}

/* 2 Columns */
.posts-grid[data-columns="2"] {
    grid-template-columns: repeat(2, 1fr);
}

/* 3 Columns (default) */
.posts-grid[data-columns="3"] {
    grid-template-columns: repeat(3, 1fr);
}

/* 4 Columns */
.posts-grid[data-columns="4"] {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1200px) {
    .posts-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .posts-grid[data-columns="1"] {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .posts-grid {
        grid-template-columns: 1fr;
    }

    .posts-grid[data-columns="1"],
    .posts-grid[data-columns="2"],
    .posts-grid[data-columns="3"],
    .posts-grid[data-columns="4"] {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Posts Layout - List
   ======================================== */
.posts-grid.layout-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.posts-grid.layout-list .post-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-lg);
}

.posts-grid.layout-list .post-card .post-thumbnail {
    flex: 0 0 300px;
    max-width: 300px;
}

.posts-grid.layout-list .post-card .post-content {
    flex: 1;
}

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

    .posts-grid.layout-list .post-card .post-thumbnail {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

/* ========================================
   Posts Layout - Masonry (CSS Columns)
   ======================================== */
.posts-grid.layout-masonry {
    column-count: 3;
    column-gap: var(--spacing-xl);
}

.posts-grid.layout-masonry .post-card {
    break-inside: avoid;
    margin-bottom: var(--spacing-xl);
    display: inline-block;
    width: 100%;
}

.posts-grid.layout-masonry .post-card .post-thumbnail img {
    height: auto;
    min-height: 180px;
}

@media (max-width: 1200px) {
    .posts-grid.layout-masonry {
        column-count: 2;
    }
}

@media (max-width: 768px) {
    .posts-grid.layout-masonry {
        column-count: 1;
    }
}

/* ========================================
   Posts Layout - Classic
   ======================================== */
.posts-grid.layout-classic {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.posts-grid.layout-classic .post-card {
    display: block;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.posts-grid.layout-classic .post-card .post-thumbnail {
    margin: 0;
    border-radius: 0;
}

.posts-grid.layout-classic .post-card .post-content {
    padding: var(--spacing-lg);
}

/* Featured Post - First post double width (homepage only) */
.posts-grid .post-card.featured {
    grid-column: span 2;
}

.posts-grid .post-card.featured .post-thumbnail img {
    height: 350px;
}

@media (max-width: 576px) {
    .posts-grid .post-card.featured {
        grid-column: span 1;
    }

    .posts-grid .post-card.featured .post-thumbnail img {
        height: 200px;
    }
}

/* Archive Grid - Equal size cards */
.posts-grid.archive-grid .post-card {
    grid-column: span 1;
}

/* ========================================
   Post Card - No border, white bg with shadow
   ======================================== */
.post-card {
    background: var(--card);
    border: none;
    border-radius: 12px;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.post-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: var(--shadow-lg);
}

.post-card .post-thumbnail {
    overflow: hidden;
}

.post-card .post-thumbnail img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.post-card:hover .post-thumbnail img {
    transform: scale(1.08);
}

.post-card .post-content {
    padding: var(--spacing-lg);
}

.post-card .entry-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: var(--spacing-sm) 0 var(--spacing-md);
    line-height: 1.4;
}

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

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

.post-card .entry-summary {
    color: var(--muted-foreground);
    font-size: var(--font-size-base);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.post-card .read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    color: var(--primary);
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: gap var(--transition-fast);
}

.post-card .read-more:hover {
    gap: var(--spacing-sm);
    color: var(--accent);
}

/* ========================================
   Entry Meta - Redesigned order
   ======================================== */
.entry-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--muted-foreground);
    margin-bottom: var(--spacing-xs);
}

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

.entry-meta .meta-icon {
    width: 14px;
    height: 14px;
    opacity: 0.7;
    flex-shrink: 0;
}

.entry-meta a {
    color: var(--muted-foreground);
    text-decoration: none;
}

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

/* Comments - align to right */
.entry-meta .comments-link {
    margin-left: auto;
}

.entry-meta .comments-link a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* Updated date */
.entry-meta .updated-on {
    color: var(--muted-foreground);
    font-style: italic;
}

/* Category & Tags in meta */
.entry-meta .cat-links a,
.entry-meta .tags-links a {
    color: var(--muted-foreground);
    text-decoration: none;
}

.entry-meta .cat-links a:hover,
.entry-meta .tags-links a:hover {
    color: var(--primary);
}

/* Category & Tags */
.post-card .cat-links,
.post-card .tags-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    font-size: var(--font-size-xs);
}

.post-card .cat-links a,
.post-card .tags-links a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    background: var(--muted);
    color: var(--muted-foreground);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.post-card .cat-links a:hover,
.post-card .tags-links a:hover {
    background: var(--primary);
    color: var(--primary-foreground);
}

/* ========================================
   Single Post
   ======================================== */
.single .entry-header {
    margin-bottom: var(--spacing-xl);
}

.single .featured-image {
    margin-bottom: var(--spacing-lg);
    border-radius: 12px;
    overflow: hidden;
}

.single .featured-image img {
    width: 100%;
    height: auto;
}

.single .entry-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin: var(--spacing-md) 0;
}

.single .entry-meta {
    font-size: var(--font-size-sm);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--spacing-lg);
}

.single .entry-meta .meta-icon {
    width: 16px;
    height: 16px;
}

.single .entry-content {
    background: var(--card);
    border-radius: 12px;
    padding: var(--spacing-2xl);
    line-height: 1.85;
    font-size: var(--font-size-base);
}

.single .entry-content p {
    margin-bottom: var(--spacing-lg);
}

.single .entry-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.single .post-categories,
.single .post-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
}

.single .post-categories svg,
.single .post-tags svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.single .footer-label {
    font-weight: 600;
    color: var(--foreground);
    font-size: var(--font-size-sm);
}

.single .post-categories a,
.single .post-tags a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    background: var(--muted);
    color: var(--muted-foreground);
    border-radius: 6px;
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.single .post-categories a:hover,
.single .post-tags a:hover {
    background: var(--primary);
    color: var(--primary-foreground);
}

/* ========================================
   Reading Progress Bar
   ======================================== */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: transparent;
    z-index: 1001;
}

.reading-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    width: 0%;
    transition: width 0.1s ease-out;
}

/* ========================================
   Table of Contents
   ======================================== */
.table-of-contents {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

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

.toc-list li {
    padding: var(--spacing-xs) 0;
}

.toc-list a {
    color: var(--muted-foreground);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.toc-sub {
    list-style: none;
    padding-left: var(--spacing-lg);
    margin: 0;
}

/* ========================================
   Sidebar
   ======================================== */
#secondary {
    flex-shrink: 0;
}

.widget {
    background: var(--card);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   Related Posts
   ======================================== */
.related-posts {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border);
}

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

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

.related-post {
    background: var(--card);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.related-thumbnail {
    overflow: hidden;
}

.related-thumbnail img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.related-post-title {
    font-size: var(--font-size-base);
    margin: var(--spacing-md);
    line-height: 1.4;
}

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

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

.related-date {
    display: block;
    margin: 0 var(--spacing-md) var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--muted-foreground);
}

@media (max-width: 768px) {
    .related-posts-grid {
        grid-template-columns: 1fr;
    }
}

.widget-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0 0 var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary);
}

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

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

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

.widget ul li a {
    color: var(--foreground);
    text-decoration: none;
}

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

/* ========================================
   Comments - Conversation/Chat Style
   ======================================== */
.comments-area {
    margin-top: var(--spacing-xl);
    background: transparent;
    border: none;
    border-radius: 0;
    box-shadow: none;
}

.comments-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0 0 var(--spacing-lg);
    padding: 0;
    background: transparent;
    border: none;
}

.comment-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.comment {
    padding: var(--spacing-lg) 0;
    border: none;
    border-bottom: 1px solid var(--border);
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
}

.comment:last-child {
    border-bottom: none;
}

.comment:hover {
    background-color: transparent;
}

.comment-body {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.comment .comment-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0 0 var(--spacing-sm) 0;
    background: transparent;
    border-bottom: none;
}

.comment .comment-author {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
}

.comment .comment-author img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary);
}

.comment .comment-meta-top {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--muted-foreground);
    margin-left: auto;
}

.comment .comment-metadata {
    font-size: var(--font-size-xs);
    color: var(--muted-foreground);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.comment .comment-metadata a {
    color: var(--muted-foreground);
}

.comment .comment-metadata a:hover {
    color: var(--primary);
}

.comment .comment-content {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--foreground);
    padding: var(--spacing-lg);
    margin: 0;
}

.comment .comment-content p {
    margin: 0 0 var(--spacing-sm);
}

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

.comment .reply {
    padding: 0 var(--spacing-lg) var(--spacing-md);
    display: flex;
    justify-content: flex-end;
}

.comment .reply a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--primary);
    padding: 4px 10px;
    background: var(--muted);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.comment .reply a:hover {
    background: var(--primary);
    color: var(--primary-foreground);
}

/* Nested comments */
.comment .children {
    margin: 0;
    padding: 0 0 0 var(--spacing-xl);
    list-style: none;
}

.comment .children .comment {
    margin-top: var(--spacing-md);
}

.comment .children .comment-body {
    border-left: 3px solid var(--primary);
}

.comment-form {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--card);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.comment-form h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0 0 var(--spacing-lg);
}

.comment-form p {
    margin-bottom: var(--spacing-md);
}

.comment-form label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--foreground);
}

.comment-form input,
.comment-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--background);
    color: var(--foreground);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 115, 190, 0.1);
}

.comment-form .form-submit {
    margin-bottom: 0;
}

.comment-form .submit,
.form-submit input[type="submit"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: var(--primary);
    color: var(--primary-foreground);
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.comment-form .submit:hover,
.form-submit input[type="submit"]:hover {
    background: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   Post Navigation (Next/Previous)
   ======================================== */
.post-navigation {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--card);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.post-navigation .prev-post,
.post-navigation .next-post {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    border-radius: 8px;
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.post-navigation .prev-post:hover,
.post-navigation .next-post:hover {
    background-color: var(--muted);
}

.post-navigation .prev-post {
    text-align: left;
}

.post-navigation .next-post {
    text-align: right;
}

.post-navigation span {
    font-size: var(--font-size-xs);
    color: var(--muted-foreground);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.post-navigation h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--foreground);
    margin: 0;
    line-height: 1.4;
}

.post-navigation .next-post {
    margin-left: auto;
}

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

    .post-navigation .next-post {
        text-align: left;
        margin-left: 0;
    }
}

/* ========================================
   Pagination
   ======================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-lg) 0;
}

.pagination a,
.pagination span {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--foreground);
    text-decoration: none;
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

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

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

/* ========================================
   Footer - Unified Container System
   ======================================== */
.site-footer {
    background: var(--card);
    border-top: 1px solid var(--border);
    margin-top: auto;
    width: 100%;
}

/* Footer Widgets Container */
.footer-widgets {
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
}

.footer-widgets.full {
    max-width: 100%;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.footer-widgets.container {
    max-width: var(--container-width, 1200px);
    padding: var(--spacing-2xl) var(--spacing-lg);
    margin: 0 auto;
}

/* Footer Widget Grid */
.footer-widget-area {
    display: grid;
    gap: var(--spacing-xl);
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
}

/* Full width footer - grid fills available space but centered */
.footer-widgets.full .footer-widget-area {
    max-width: var(--container-width, 1200px);
}

/* Container footer - grid fills container */
.footer-widgets.container .footer-widget-area {
    max-width: 100%;
}

/* Column counts based on widget count */
.footer-widget-area.footer-widgets-1 {
    grid-template-columns: 1fr;
}

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

.footer-widget-area.footer-widgets-3 {
    grid-template-columns: repeat(3, 1fr);
}

.footer-widget-area.footer-widgets-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 992px) {
    .footer-widget-area {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 576px) {
    .footer-widget-area {
        grid-template-columns: 1fr !important;
    }
}

.footer-widgets .footer-widget {
    margin-bottom: 0;
    width: 100%;
}

.footer-widgets .widget {
    background: var(--card);
    padding: var(--spacing-lg);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.site-info {
    background: var(--foreground);
    color: var(--background);
    padding: var(--spacing-lg) var(--spacing-lg);
    text-align: center;
    width: 100%;
    max-width: 100%;
    margin: 0;
    border-radius: 0;
}

.site-info a {
    color: var(--background);
}

.site-info-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    width: 100%;
    max-width: var(--container-width, 1200px);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    box-sizing: border-box;
}

/* Copyright Position */
.copyright-position-left {
    align-items: flex-start;
    text-align: left;
}

.copyright-position-center {
    align-items: center;
    text-align: center;
}

.copyright-position-right {
    align-items: flex-end;
    text-align: right;
}

.site-info-inner .copyright {
    order: 2;
    width: 100%;
}

.site-info-inner .footer-navigation {
    order: 1;
    width: 100%;
}

.site-info-inner.full {
    max-width: 100%;
}

.site-info-inner.container {
    max-width: var(--container-width, 1200px);
}

.footer-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.footer-menu a {
    color: var(--background);
    text-decoration: none;
    font-size: var(--font-size-base);
}

.footer-menu a:hover {
    text-decoration: underline;
}

/* ========================================
   Back to Top - Upward Arrow
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background: var(--primary);
    color: var(--primary-foreground);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 999;
    box-shadow: 0 4px 16px rgba(30, 115, 190, 0.4);
}

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

.back-to-top:hover {
    background: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 6px 24px rgba(30, 115, 190, 0.5);
}

.back-to-top svg {
    width: 28px;
    height: 28px;
}

.back-to-top svg line,
.back-to-top svg polyline {
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ========================================
   404 Page
   ======================================== */
.error-404 {
    text-align: center;
    padding: var(--spacing-2xl);
}

.error-404 .page-title {
    font-size: 6rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
}

/* ========================================
   Archive Header
   ======================================== */
.page-header {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--card);
    border-radius: 12px;
    text-align: center;
}

.archive-title {
    font-size: var(--font-size-2xl);
    margin: 0;
}

.archive-description {
    color: var(--muted-foreground);
    margin-top: var(--spacing-sm);
}

/* ========================================
   Screen Reader Text
   ======================================== */
.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   Skip Link
   ======================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: var(--primary-foreground);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 1000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* ========================================
   No Results
   ======================================== */
.no-results {
    padding: var(--spacing-2xl);
    text-align: center;
}

/* ========================================
   Utility Classes
   ======================================== */
.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

/* ========================================
   Code Blocks
   ======================================== */
pre {
    background: var(--muted, #f5f5f5);
    border: 1px solid var(--border, #e0e0e0);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    overflow-x: auto;
    font-size: 0.875rem;
    line-height: 1.6;
    margin: 1.5rem 0;
}

pre code {
    background: transparent;
    border: none;
    padding: 0;
    font-size: inherit;
    color: inherit;
}

code {
    background: var(--muted, #f5f5f5);
    border: 1px solid var(--border, #e0e0e0);
    border-radius: 4px;
    padding: 0.125rem 0.375rem;
    font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--foreground);
}

[data-theme="dark"] pre {
    background: var(--muted, #333);
    border-color: var(--border, #444);
}

[data-theme="dark"] code {
    background: var(--muted, #333);
    border-color: var(--border, #444);
}

/* ========================================
   Print Styles
   ======================================== */
@media print {

    .site-header,
    .site-footer,
    .back-to-top,
    .search-form,
    .theme-toggle,
    .mobile-menu-toggle,
    .pagination,
    .reading-progress-bar {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    a {
        color: black;
    }
}