/* ====== Minimal CSS Reset ====== */
*, *::before, *::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    -moz-text-size-adjust: none;
    -webkit-text-size-adjust: none;
    text-size-adjust: none;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
    overflow-wrap: break-word;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

/* ====================================
   BirdCMS Blog CSS — v5
   Korean-optimized, responsive, dark mode
   ==================================== */

/* ---------- Design Tokens ---------- */
:root {
    --font-sans: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont,
        'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

    --content-width: 760px;
    --site-width: 1120px;
    --content-padding: 1.5rem;

    /* Spacing scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.22s ease;
    --transition-slow: 0.35s ease;

    /* Light theme palette */
    --color-bg:              #ffffff;
    --color-bg-secondary:    #f7f8fa;
    --color-bg-tertiary:     #eef0f3;
    --color-text:            #111827;
    --color-text-secondary:  #374151;
    --color-text-muted:      #6b7280;
    --color-text-faint:      #9ca3af;
    --color-border:          #e5e7eb;
    --color-border-strong:   #d1d5db;

    /* Accent — blue */
    --color-accent:          #2563eb;
    --color-accent-hover:    #1d4ed8;
    --color-accent-light:    #dbeafe;
    --color-accent-muted:    #93c5fd;

    /* Tags */
    --color-tag-bg:          #eff6ff;
    --color-tag-text:        #1d4ed8;
    --color-tag-border:      #bfdbfe;

    /* Code */
    --color-code-bg:         #f3f4f6;
    --color-code-border:     #e5e7eb;
    --color-code-text:       #be185d;

    /* Blockquote */
    --color-bq-border:       #2563eb;
    --color-bq-bg:           #eff6ff;

    /* Card */
    --color-card-bg:         #ffffff;
    --color-card-shadow:     0 1px 3px rgba(0,0,0,0.07), 0 4px 12px rgba(0,0,0,0.05);
    --color-card-shadow-hover: 0 4px 12px rgba(0,0,0,0.1), 0 16px 40px rgba(0,0,0,0.08);

    /* Header */
    --color-header-bg:       rgba(255,255,255,0.92);
}

[data-theme="dark"] {
    --color-bg:              #0f1117;
    --color-bg-secondary:    #161b24;
    --color-bg-tertiary:     #1e2430;
    --color-text:            #f1f5f9;
    --color-text-secondary:  #cbd5e1;
    --color-text-muted:      #94a3b8;
    --color-text-faint:      #64748b;
    --color-border:          #1e2d3d;
    --color-border-strong:   #2d3f55;

    --color-accent:          #60a5fa;
    --color-accent-hover:    #93c5fd;
    --color-accent-light:    #1e3a5f;
    --color-accent-muted:    #3b82f6;

    --color-tag-bg:          #172033;
    --color-tag-text:        #60a5fa;
    --color-tag-border:      #1e3a5f;

    --color-code-bg:         #161b24;
    --color-code-border:     #1e2d3d;
    --color-code-text:       #f472b6;

    --color-bq-border:       #3b82f6;
    --color-bq-bg:           #0f1e33;

    --color-card-bg:         #161b24;
    --color-card-shadow:     0 1px 3px rgba(0,0,0,0.3), 0 4px 12px rgba(0,0,0,0.25);
    --color-card-shadow-hover: 0 4px 16px rgba(0,0,0,0.4), 0 20px 48px rgba(0,0,0,0.3);

    --color-header-bg:       rgba(15,17,23,0.92);
}

/* ---------- Base ---------- */
body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.75;
    font-size: 1rem;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

.container {
    max-width: var(--site-width);
    margin-inline: auto;
    padding-inline: var(--content-padding);
}

/* ---------- Header ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 200;
    background: var(--color-header-bg);
    backdrop-filter: blur(12px) saturate(1.5);
    -webkit-backdrop-filter: blur(12px) saturate(1.5);
    border-bottom: 1px solid var(--color-border);
}

.site-header .container {
    max-width: var(--site-width);
}

.site-header nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    height: 3.5rem;
}

.site-header nav ul {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.025em;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

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

.site-logo strong {
    font-weight: 800;
}

.logo-img {
    height: 30px;
    width: auto;
}

.site-header nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-header nav a:hover {
    color: var(--color-text);
    background-color: var(--color-bg-secondary);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    color: var(--color-text-muted);
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-border-strong);
    color: var(--color-text);
}

/* ---------- Main ---------- */
.site-main {
    min-height: calc(100vh - 7rem);
    padding: var(--space-10) 0;
}

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-8) 0;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    text-align: center;
}

.site-footer p {
    margin-bottom: var(--space-2);
}

.site-footer p:last-child {
    margin-bottom: 0;
}

.site-footer a {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

/* ---------- Blog Index ---------- */
.blog-index {
    max-width: var(--site-width);
}

.blog-header {
    text-align: center;
    margin-bottom: var(--space-12);
    padding-bottom: var(--space-10);
    border-bottom: 1px solid var(--color-border);
}

.blog-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.15;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.blog-description {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    max-width: 560px;
    margin-inline: auto;
    line-height: 1.65;
}

/* ---------- Post Grid ---------- */
.post-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-12);
}

/* ---------- Post Card ---------- */
.post-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--color-card-shadow);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

.post-card-image-link {
    display: block;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--color-bg-secondary);
}

.post-card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.post-card:hover .post-card-image {
    transform: scale(1.04);
}

.post-card-body {
    padding: var(--space-5) var(--space-6);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.post-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    margin-bottom: var(--space-3);
}

.post-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.45;
    margin-bottom: var(--space-2);
    letter-spacing: -0.015em;
}

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

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

.post-card-excerpt {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    line-height: 1.65;
    flex: 1;
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
    margin-top: auto;
    gap: var(--space-2);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    min-width: 0;
}

.post-meta-sep {
    color: var(--color-text-faint);
}

.post-author {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--color-text-muted);
    font-weight: 500;
    white-space: nowrap;
    transition: color var(--transition-fast);
}

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

.author-avatar-small {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.post-date {
    color: var(--color-text-faint);
    white-space: nowrap;
}

.read-more {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    white-space: nowrap;
    flex-shrink: 0;
    transition: color var(--transition-fast);
    letter-spacing: 0.01em;
}

.read-more:hover {
    color: var(--color-accent-hover);
}

/* ---------- Tag Badge ---------- */
.tag-badge {
    display: inline-block;
    padding: 0.18rem 0.6rem;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--color-tag-text);
    background: var(--color-tag-bg);
    border: 1px solid var(--color-tag-border);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    line-height: 1.6;
}

.tag-badge:hover {
    opacity: 0.75;
    transform: translateY(-1px);
}

.tag-badge.active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

/* ---------- Pagination ---------- */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-1);
    flex-wrap: wrap;
    margin: var(--space-8) 0 var(--space-4);
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.25rem;
    height: 2.25rem;
    padding: 0 var(--space-3);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

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

.pagination-btn.current {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
    pointer-events: none;
    font-weight: 600;
}

.pagination-ellipsis {
    padding: 0 var(--space-1);
    color: var(--color-text-faint);
}

/* ---------- Empty State ---------- */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-8);
    color: var(--color-text-muted);
}

.empty-state a {
    color: var(--color-accent);
    font-weight: 500;
}

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

/* ---------- Post Article Page ---------- */
.post-page {
    position: relative;
    max-width: var(--content-width);
    margin-inline: auto;
}

.post-article {
    max-width: var(--content-width);
    margin-inline: auto;
}

/* Post Header */
.post-header {
    margin-bottom: var(--space-8);
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    margin-bottom: var(--space-4);
}

.post-title {
    font-size: clamp(1.75rem, 4.5vw, 2.75rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.035em;
    margin-bottom: var(--space-6);
    color: var(--color-text);
    word-break: keep-all;
}

.post-meta-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-border);
}

.post-author-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.author-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 2px solid var(--color-border);
}

.author-avatar-placeholder {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.author-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    line-height: 1.35;
}

.author-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

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

.post-date {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.post-reading-info {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.reading-time::before {
    content: '·';
    margin-right: var(--space-1);
    opacity: 0.5;
}

/* On mobile the meta-bar stacks vertically, so hide the inline dot separator */
@media (max-width: 768px) {
    .reading-time::before {
        display: none;
    }
}

/* Feature Image */
.post-feature-image {
    margin: 0 0 var(--space-8);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.feature-image {
    width: 100%;
    height: auto;
    display: block;
}

/* ---------- TOC Sidebar ---------- */
.post-toc-sidebar {
    display: none;
    position: absolute;
    left: calc(100% + 2.5rem);
    top: 0;
    width: 210px;
    height: 100%;
    pointer-events: none;
}

.post-toc-sidebar.toc-visible {
    display: block;
    pointer-events: auto;
}

.toc-sticky {
    position: sticky;
    top: 5.5rem;
    max-height: calc(100vh - 7rem);
    overflow-y: auto;
    padding: 0 0 var(--space-4) var(--space-4);
    border-left: 2px solid var(--color-border);
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.toc-sticky::-webkit-scrollbar { width: 3px; }
.toc-sticky::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 2px; }

.toc-title {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-faint);
    margin-bottom: var(--space-3);
}

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

.toc-list li {
    display: block;
    margin: 0;
    padding: 0;
}

.toc-list .toc-h3 { padding-left: 0.75rem; }
.toc-list .toc-h4 { padding-left: 1.5rem; }

.toc-list a {
    display: block;
    font-size: 0.75rem;
    line-height: 1.45;
    color: var(--color-text-faint);
    padding: 0.18rem 0 0.18rem var(--space-4);
    margin-left: calc(-1 * var(--space-4));
    border-left: 2px solid transparent;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: break-word;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

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

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

/* ---------- Post Content Typography ---------- */
.post-content {
    font-size: 1.05rem;
    line-height: 1.85;
    color: var(--color-text-secondary);
    word-break: keep-all;
}

/* Headings */
.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.025em;
    color: var(--color-text);
    scroll-margin-top: 5.5rem;
    word-break: keep-all;
}

.post-content h1 {
    font-size: 1.9rem;
    margin-top: var(--space-12);
    margin-bottom: var(--space-5);
}

.post-content h2 {
    font-size: 1.55rem;
    margin-top: var(--space-10);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--color-border);
}

.post-content h3 {
    font-size: 1.25rem;
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
}

.post-content h4 {
    font-size: 1.1rem;
    margin-top: var(--space-6);
    margin-bottom: var(--space-2);
}

.post-content h5,
.post-content h6 {
    font-size: 1rem;
    margin-top: var(--space-5);
    margin-bottom: var(--space-2);
}

/* Heading anchors from TocExtension */
.post-content .heading-anchor {
    opacity: 0;
    font-size: 0.75em;
    font-weight: 400;
    color: var(--color-text-faint);
    margin-left: var(--space-2);
    vertical-align: middle;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.post-content :is(h1,h2,h3,h4,h5,h6):hover .heading-anchor {
    opacity: 1;
}

/* Paragraphs */
.post-content p {
    margin-bottom: 1.5rem;
}

/* Links */
.post-content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    text-decoration-color: var(--color-accent-muted);
    transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

.post-content a:hover {
    color: var(--color-accent-hover);
    text-decoration-color: var(--color-accent-hover);
}

/* Bold / Strong */
.post-content strong {
    font-weight: 700;
    color: var(--color-text);
}

/* Italic */
.post-content em {
    font-style: italic;
}

/* Strikethrough */
.post-content del,
.post-content s {
    color: var(--color-text-muted);
    text-decoration: line-through;
}

/* Horizontal Rule */
.post-content hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: var(--space-10) auto;
    width: 60%;
}

/* Blockquote */
.post-content blockquote {
    position: relative;
    border-left: 3px solid var(--color-bq-border);
    background: var(--color-bq-bg);
    margin: var(--space-6) 0;
    padding: var(--space-5) var(--space-6);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--color-text-muted);
    font-style: italic;
}

.post-content blockquote p {
    margin-bottom: 0;
}

.post-content blockquote p + p {
    margin-top: var(--space-3);
    margin-bottom: 0;
}

/* Inline Code */
.post-content code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--color-code-bg);
    border: 1px solid var(--color-code-border);
    padding: 0.12em 0.45em;
    border-radius: var(--radius-sm);
    color: var(--color-code-text);
    word-break: break-all;
}

/* Code Block */
.post-content pre {
    background: #1a1b26 !important;
    border-radius: var(--radius-md);
    padding: var(--space-6);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: var(--space-6) 0;
    border: 1px solid rgba(255,255,255,0.06);
    position: relative;
    font-size: 0.9rem;
    line-height: 1.65;
}

.post-content pre code {
    background: transparent;
    border: none;
    padding: 0;
    font-size: inherit;
    line-height: inherit;
    color: #c0caf5;
    word-break: normal;
}

/* Code copy button */
.copy-code-btn {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    color: rgba(255,255,255,0.55);
    padding: 0.2rem 0.55rem;
    border-radius: var(--radius-sm);
    font-size: 0.72rem;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
    letter-spacing: 0.01em;
}

.copy-code-btn:hover {
    background: rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.9);
}

.copy-code-btn.copied {
    background: rgba(34,197,94,0.25);
    border-color: rgba(34,197,94,0.4);
    color: #4ade80;
}

/* Tables */
.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-6) 0;
    font-size: 0.9rem;
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.post-content table thead {
    background: var(--color-bg-secondary);
}

.post-content table th {
    padding: 0.65rem var(--space-4);
    border: 1px solid var(--color-border);
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--color-text);
    white-space: nowrap;
}

.post-content table td {
    padding: 0.6rem var(--space-4);
    border: 1px solid var(--color-border);
    vertical-align: top;
}

.post-content table tbody tr:nth-child(even) td {
    background: var(--color-bg-secondary);
}

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

/* Lists */
.post-content ul,
.post-content ol {
    padding-left: 1.8rem;
    margin-bottom: 1.5rem;
}

.post-content ul {
    list-style: disc;
}

.post-content ol {
    list-style: decimal;
}

.post-content li {
    margin-bottom: var(--space-2);
    line-height: 1.75;
}

.post-content li > ul,
.post-content li > ol {
    margin-top: var(--space-2);
    margin-bottom: 0;
}

.post-content li > ul {
    list-style: circle;
}

.post-content li > ol {
    list-style: lower-alpha;
}

/* Definition Lists */
.post-content dl {
    margin-bottom: 1.5rem;
}

.post-content dt {
    font-weight: 700;
    color: var(--color-text);
    margin-top: var(--space-3);
}

.post-content dd {
    padding-left: 1.5rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-1);
}

/* kbd element */
.post-content kbd {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.8em;
    padding: 0.1em 0.45em;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-strong);
    border-bottom-width: 2px;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    box-shadow: inset 0 -1px 0 var(--color-border-strong);
}

/* Mark / Highlight */
.post-content mark {
    background: #fef08a;
    color: #713f12;
    padding: 0.1em 0.2em;
    border-radius: 2px;
}

[data-theme="dark"] .post-content mark {
    background: #854d0e;
    color: #fef9c3;
}

/* Images in content */
.post-content img,
.responsive-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    display: block;
    margin: var(--space-6) auto;
    border: 1px solid var(--color-border);
}

/* Broken image fallback */
.post-content img[src]::after {
    content: '이미지를 불러올 수 없습니다';
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    inset: 0;
    background: var(--color-bg-secondary);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    border-radius: var(--radius-md);
    border: 1px dashed var(--color-border);
}

.post-content figure {
    margin: var(--space-6) 0;
    text-align: center;
}

.post-content figcaption {
    margin-top: var(--space-2);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-style: italic;
    line-height: 1.5;
}

/* Codehilite wrappers */
.post-content .highlight {
    margin: var(--space-6) 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.post-content .highlight pre {
    margin: 0;
    border-radius: 0;
    border: none;
}

/* ---------- Post Footer ---------- */
.post-footer {
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

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

.tags-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-right: var(--space-1);
}

/* Author Bio Card */
.author-bio-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-5);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

.author-bio-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 2px solid var(--color-border);
}

.author-bio-avatar-placeholder {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 700;
    flex-shrink: 0;
}

.author-bio-name {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.author-bio-name a {
    color: var(--color-text);
    transition: color var(--transition-fast);
}

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

.author-bio-text {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.65;
    margin: 0;
}

/* ---------- Tag Page ---------- */
.tag-page {
    max-width: var(--site-width);
}

.tag-header {
    text-align: center;
    margin-bottom: var(--space-12);
    padding-bottom: var(--space-10);
    border-bottom: 1px solid var(--color-border);
}

.tag-badge-large {
    display: inline-block;
    padding: 0.3rem 1rem;
    background: var(--color-tag-bg);
    color: var(--color-tag-text);
    border: 1px solid var(--color-tag-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--space-4);
    letter-spacing: 0.01em;
}

.tag-title {
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.tag-description {
    color: var(--color-text-muted);
    font-size: 1rem;
    margin-bottom: var(--space-2);
}

.tag-count {
    color: var(--color-text-faint);
    font-size: 0.875rem;
}

/* ---------- Author Page ---------- */
.author-page {
    max-width: var(--site-width);
}

.author-profile {
    display: flex;
    gap: var(--space-8);
    align-items: flex-start;
    margin-bottom: var(--space-12);
    padding-bottom: var(--space-10);
    border-bottom: 1px solid var(--color-border);
}

.author-profile-image {
    flex-shrink: 0;
}

.author-avatar-large {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-border);
}

.author-avatar-large-placeholder {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.25rem;
    font-weight: 700;
}

.author-profile-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.author-profile-name {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-text);
    line-height: 1.2;
}

.author-email a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.author-bio {
    color: var(--color-text-muted);
    line-height: 1.7;
    font-size: 0.95rem;
}

.author-post-count {
    color: var(--color-text-faint);
    font-size: 0.875rem;
}

/* ---------- 404 Page ---------- */
.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
}

.error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

.error-code {
    font-size: clamp(5rem, 18vw, 9rem);
    font-weight: 900;
    line-height: 1;
    color: var(--color-border);
    letter-spacing: -0.05em;
}

.error-title {
    font-size: clamp(1.2rem, 3vw, 1.75rem);
    font-weight: 700;
    color: var(--color-text);
}

.error-description {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.75;
    max-width: 400px;
}

.error-actions {
    margin-top: var(--space-2);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.65rem 1.5rem;
    background: var(--color-accent);
    color: #fff;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 1px 3px rgba(37,99,235,0.3);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37,99,235,0.35);
}

/* ---------- Responsive ---------- */

/* Tablet: 2-column grid */
@media (max-width: 1024px) {
    .post-toc-sidebar {
        display: none !important;
    }
}

@media (max-width: 768px) {
    :root {
        --content-padding: 1rem;
    }

    .site-main {
        padding: var(--space-8) 0;
    }

    .post-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--space-5);
    }

    .post-article {
        padding: 0;
    }

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

    .author-profile-info {
        align-items: center;
    }

    .post-meta-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

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

    .post-content {
        font-size: 1rem;
    }

    .post-title {
        font-size: 1.65rem;
    }

    .post-content h2 { font-size: 1.35rem; }
    .post-content h3 { font-size: 1.15rem; }

    .blog-header {
        margin-bottom: var(--space-8);
        padding-bottom: var(--space-6);
    }

    .tag-header,
    .author-profile {
        margin-bottom: var(--space-8);
        padding-bottom: var(--space-6);
    }
}

/* Mobile: single column */
@media (max-width: 480px) {
    .blog-title {
        font-size: 1.6rem;
    }

    .site-header nav ul {
        gap: var(--space-1);
    }

    .post-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .post-card-body {
        padding: var(--space-4) var(--space-5);
    }

    .post-content pre {
        padding: var(--space-4);
        font-size: 0.82rem;
    }

    .author-profile {
        gap: var(--space-4);
    }
}

/* Wide desktop: ensure TOC has space */
@media (min-width: 1280px) {
    .post-page {
        /* Allow the absolute-positioned TOC to overflow without scrollbar */
        overflow: visible;
    }
}