/* ==========================================================
   Modern Velog & Bootstrap 5.3 Custom Theme System
   ========================================================== */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

:root {
    --font-family-base: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', 'Segoe UI', 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
    --primary-color: #20c997;
    --primary-hover: #12b886;
    --card-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
    --hover-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
    --body-background: #f1f5f9;
    --card-background: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --border-color: #e2e8f0;
}

[data-bs-theme="dark"] {
    --body-background: #0b1120;
    --card-background: #131c31;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #222f49;
    --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.55);
    --hover-shadow: 0 12px 36px rgba(0, 0, 0, 0.75);
}

html {
    overflow-y: scroll;
    scrollbar-gutter: stable;
}

body {
    font-family: var(--font-family-base);
    background-color: var(--body-background, #f8f9fa);
    color: var(--text-primary, #212529);
    letter-spacing: -0.01em;
    min-height: 100vh;
    padding-bottom: 60px !important;
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* ==========================================================
   Header & Navigation
   ========================================================== */
.navbar-brand-velog {
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.navbar-brand-velog span {
    color: var(--primary-color);
}

.nav-link-anchor {
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    border-radius: 8px;
    padding: 0.4rem 0.8rem !important;
}

.nav-link-anchor:hover, .nav-link-anchor.active {
    color: var(--primary-color) !important;
    background-color: rgba(32, 201, 151, 0.08);
}

/* Header Buttons */
.btn-theme-toggle {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-theme-toggle:hover {
    background-color: rgba(32, 201, 151, 0.1);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.btn-nav-login {
    background-color: #ffffff;
    border: 1.5px solid #20c997;
    color: #0ca678;
    font-weight: 700;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-nav-login:hover {
    background-color: #20c997;
    border-color: #20c997;
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(32, 201, 151, 0.35);
}

.btn-user-profile {
    background-color: var(--card-background);
    border-color: var(--border-color);
    color: var(--text-primary);
}

/* 3-Column Layout Sticky Sidebars */
aside {
    align-self: stretch !important;
    position: relative !important;
    height: auto !important;
    margin-top: 0 !important;
    padding-top: 0 !important;
}

.sticky-sidebar {
    position: -webkit-sticky !important;
    position: sticky !important;
    top: 4.75rem !important;
    max-height: calc(100vh - 5.75rem);
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    z-index: 10;
    margin-top: 0 !important;
    padding-top: 0 !important;
}

.sticky-sidebar > .card:first-child {
    margin-top: 0 !important;
}

.sticky-sidebar::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
}

/* ==========================================================
   Card Styling
   ========================================================== */
.blog-card {
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius, 16px);
    background: var(--card-background);
    box-shadow: var(--card-shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.3s ease;
    overflow: hidden;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--hover-shadow);
}

.blog-card-img {
    height: 200px;
    object-fit: cover;
}

.badge-velog {
    background-color: rgba(32, 201, 151, 0.12);
    color: #0ca678;
    font-weight: 600;
    font-size: 0.8rem;
    padding: 0.45em 0.85em;
    border-radius: 20px;
}

/* ==========================================================
   Post Detail Page & Content Typography
   ========================================================== */
.post-header-title {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-primary);
}

.post-header-subtitle {
    font-size: 1.15rem;
    color: #6b7280;
    font-weight: 500;
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
}

.post-content-body {
    font-size: 1.1rem;
    line-height: 1.85;
    color: var(--text-primary);
}

.post-content-body h2 {
    font-size: 1.55rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1.2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
    scroll-margin-top: 6rem;
    color: var(--text-primary);
}

.post-content-body h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-top: 1.8rem;
    margin-bottom: 1rem;
    scroll-margin-top: 6rem;
    color: var(--text-primary);
}

.post-content-body p {
    margin-bottom: 1.25rem;
}

.post-content-body blockquote {
    background: rgba(32, 201, 151, 0.05);
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
}

.post-content-body code:not(pre code) {
    background-color: rgba(32, 201, 151, 0.1);
    color: #0ca678;
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

.post-content-body pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 1.25rem 1.5rem;
    border-radius: 12px;
    overflow-x: auto;
    margin: 1.5rem 0;
    line-height: 1.7;
    font-size: 0.92rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.post-content-body pre code {
    background: transparent !important;
    color: inherit !important;
    padding: 0 !important;
    border-radius: 0 !important;
    font-family: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace !important;
    font-size: inherit;
    line-height: inherit;
    tab-size: 4;
}

.post-content-body img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 1.5rem 0;
}

.post-content-body table {
    width: 100%;
    margin-bottom: 1.5rem;
    border-collapse: collapse;
}

.post-content-body th, .post-content-body td {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
}

.post-content-body th {
    background-color: rgba(0, 0, 0, 0.02);
    font-weight: 600;
}

/* ==========================================================
   Table of Contents & Widgets
   ========================================================== */
.toc-container {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    padding: 1.25rem;
    border-radius: 12px;
    font-size: 0.9rem;
}

.toc-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    padding: 0.35rem 0;
    transition: all 0.2s ease;
    border-radius: 6px;
}

.toc-link:hover, .toc-link.active {
    color: var(--primary-color) !important;
    font-weight: 700;
    transform: translateX(3px);
}

.tag-pill {
    font-size: 0.85rem;
    font-weight: 600;
    color: #495057;
    background-color: #e9ecef;
    border: 1px solid #dee2e6;
    border-radius: 20px;
    padding: 0.4em 0.9em;
    transition: all 0.2s ease;
    display: inline-block;
    text-decoration: none;
}

.tag-pill:hover, .tag-pill.active {
    background-color: var(--primary-color) !important;
    color: #ffffff !important;
    border-color: var(--primary-color) !important;
    transform: translateY(-1px);
}

/* Sidebar Widget Items (Categories, Archives, Nav Menus) */
.sidebar-widget-item {
    background-color: #f1f5f9;
    border: 1px solid #e2e8f0;
    color: #1e293b;
    transition: all 0.2s ease;
}

.sidebar-widget-item:hover {
    background-color: #e2e8f0;
    color: #0f172a;
    border-color: #cbd5e1;
    transform: translateX(3px);
}

.sidebar-widget-item i {
    font-size: 1.05rem;
}

.widget-count-badge {
    background-color: #e2e8f0;
    color: #475569;
    font-size: 0.75rem;
    padding: 0.35em 0.65em;
    font-weight: 700;
}

/* ==========================================================
   Interactive Components (Likes, Reactions, Social, Newsletter)
   ========================================================== */
.btn-like-heart {
    padding: 0.6rem 1.8rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.05rem;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.btn-like-heart:hover {
    transform: scale(1.05);
    border-color: #ff6b6b;
}

.btn-like-heart.liked {
    background-color: #ff6b6b !important;
    border-color: #ff6b6b !important;
    color: #ffffff !important;
}

/* Social Share Bar */
.social-share-container {
    background-color: #f8f9fa;
    border: 1px solid #e9ecef;
}

.share-title-text {
    color: #495057;
}

.btn-copy-share-url {
    background-color: #ffffff;
    border: 1px solid #ced4da;
    color: #495057;
    transition: all 0.2s ease;
}

.btn-copy-share-url:hover {
    background-color: #e9ecef;
    color: #212529;
}

/* Post Reactions Card */
.post-reactions-card {
    background-color: #f8f9fa;
    border: 1px solid #e9ecef;
}

.reactions-heading {
    color: #495057;
}

.post-reactions-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: wrap;
}

@media (min-width: 576px) {
    .post-reactions-buttons {
        flex-wrap: nowrap !important;
        gap: clamp(0.25rem, 0.6vw, 0.5rem) !important;
    }
}

.btn-reaction-item {
    background-color: #ffffff;
    border: 1px solid #dee2e6;
    color: #212529;
    padding: 0.32rem clamp(0.45rem, 0.8vw, 0.75rem) !important;
    gap: 0.35rem !important;
    font-size: 0.84rem;
    line-height: 1.2;
    transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
    cursor: pointer;
    white-space: nowrap;
    flex: 0 0 auto;
}

.btn-reaction-item .reaction-emoji {
    font-size: 1.15rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
}

.btn-reaction-item .reaction-label {
    font-size: 0.8rem;
    color: #495057;
    white-space: nowrap;
}

.btn-reaction-item .count-badge {
    background-color: #e9ecef;
    color: #212529;
    border: 1px solid #ced4da;
    font-size: 0.72rem;
    padding: 0.2em 0.55em;
    font-weight: 700;
}

.btn-reaction-item:hover {
    transform: translateY(-2px);
    border-color: #20c997;
}

.btn-reaction-item.btn-success {
    background-color: #20c997 !important;
    border-color: #20c997 !important;
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(32, 201, 151, 0.35) !important;
}

.btn-reaction-item.btn-success .reaction-label {
    color: #ffffff !important;
}

.btn-reaction-item.btn-success .count-badge {
    background-color: rgba(255, 255, 255, 0.25) !important;
    color: #ffffff !important;
    border-color: rgba(255, 255, 255, 0.4) !important;
}

/* Disclaimer & Newsletter */
.post-disclaimer-box {
    background-color: #f8f9fa;
    border: 1px solid #e9ecef;
}

.disclaimer-text {
    color: #495057;
}

.newsletter-card {
    background-color: #f8f9fa;
    border: 1px solid #e9ecef;
}

.newsletter-heading {
    color: #212529;
}

.newsletter-subheading {
    color: #6c757d;
}

/* Related Posts */
.related-posts h5 {
    color: var(--text-primary);
}

.related-posts .card {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
}

/* ==========================================================
   Light Mode Explicit Contrast & Readability Enhancements
   ========================================================== */
[data-bs-theme="light"] body {
    background-color: #f1f5f9 !important;
    color: #0f172a !important;
}

[data-bs-theme="light"] .text-muted {
    color: #475569 !important;
    font-weight: 500;
}

[data-bs-theme="light"] .text-secondary {
    color: #334155 !important;
}

[data-bs-theme="light"] .text-dark,
[data-bs-theme="light"] .text-body {
    color: #0f172a !important;
}

[data-bs-theme="light"] .card,
[data-bs-theme="light"] .blog-card {
    background-color: #ffffff !important;
    border: 1px solid #e2e8f0 !important;
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.05);
}

[data-bs-theme="light"] .blog-card:hover {
    border-color: #20c997 !important;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12) !important;
}

[data-bs-theme="light"] .badge-velog {
    background-color: #d1fae5 !important;
    color: #065f46 !important;
    border: 1px solid #a7f3d0 !important;
    font-weight: 700;
}

[data-bs-theme="light"] .post-header-title {
    color: #0f172a !important;
}

[data-bs-theme="light"] .post-header-subtitle {
    color: #475569 !important;
    font-weight: 500;
}

[data-bs-theme="light"] .post-content-body {
    color: #1e293b !important;
    font-size: 1.125rem;
    line-height: 1.85;
}

[data-bs-theme="light"] .post-content-body h1,
[data-bs-theme="light"] .post-content-body h2,
[data-bs-theme="light"] .post-content-body h3 {
    color: #0f172a !important;
    font-weight: 800;
}

[data-bs-theme="light"] .post-content-body h2 {
    border-bottom: 2px solid #e2e8f0 !important;
}

[data-bs-theme="light"] .post-content-body p,
[data-bs-theme="light"] .post-content-body li {
    color: #1e293b !important;
}

[data-bs-theme="light"] .post-content-body blockquote {
    background: #f0fdf4 !important;
    border-left: 4px solid #20c997 !important;
    color: #14532d !important;
    font-style: normal;
    font-weight: 500;
}

[data-bs-theme="light"] .post-content-body code:not(pre code) {
    background-color: #f1f5f9 !important;
    color: #0f766e !important;
    border: 1px solid #e2e8f0 !important;
    font-weight: 600;
}

[data-bs-theme="light"] .sidebar-widget-item {
    background-color: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
    color: #1e293b !important;
    font-weight: 600;
}

[data-bs-theme="light"] .sidebar-widget-item:hover {
    background-color: #e6fcf5 !important;
    border-color: #20c997 !important;
    color: #0ca678 !important;
}

[data-bs-theme="light"] .widget-count-badge {
    background-color: #e2e8f0 !important;
    color: #334155 !important;
    font-weight: 700;
}

[data-bs-theme="light"] .tag-pill,
[data-bs-theme="light"] a.tag-pill {
    background-color: #f0fdf4 !important;
    color: #0f766e !important;
    border: 1px solid #bbf7d0 !important;
    font-weight: 600;
}

[data-bs-theme="light"] .tag-pill:hover,
[data-bs-theme="light"] a.tag-pill:hover {
    background-color: #20c997 !important;
    color: #ffffff !important;
    border-color: #20c997 !important;
}

[data-bs-theme="light"] .toc-container {
    background-color: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
    border-left: 4px solid #20c997 !important;
}

[data-bs-theme="light"] .toc-link {
    color: #475569 !important;
    font-weight: 500;
}

[data-bs-theme="light"] .toc-link:hover,
[data-bs-theme="light"] .toc-link.active {
    color: #0ca678 !important;
    font-weight: 700;
}

[data-bs-theme="light"] .social-share-container,
[data-bs-theme="light"] .post-reactions-card,
[data-bs-theme="light"] .post-disclaimer-box,
[data-bs-theme="light"] .newsletter-card {
    background-color: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
}

[data-bs-theme="light"] .btn-reaction-item {
    background-color: #ffffff !important;
    border: 1px solid #cbd5e1 !important;
    color: #0f172a !important;
}

[data-bs-theme="light"] .btn-reaction-item .reaction-label {
    color: #334155 !important;
    font-weight: 600;
}

[data-bs-theme="light"] .btn-reaction-item .count-badge {
    background-color: #f1f5f9 !important;
    color: #0f172a !important;
    border: 1px solid #cbd5e1 !important;
}

/* Reading Time Badge in Light Mode */
[data-bs-theme="light"] .reading-time-badge {
    background-color: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
    color: #334155 !important;
    font-weight: 500;
}

[data-bs-theme="light"] .reading-time-badge .reading-time-text {
    color: #1e293b !important;
}

[data-bs-theme="light"] .reading-time-badge .reading-time-text strong {
    color: #0f172a !important;
    font-weight: 700;
}

[data-bs-theme="light"] .reading-time-badge .reading-time-dot,
[data-bs-theme="light"] .reading-time-badge .reading-time-count {
    color: #64748b !important;
}

/* ==========================================================
   Dark Mode Explicit Overrides ([data-bs-theme="dark"])
   ========================================================== */
[data-bs-theme="dark"] body {
    background-color: #0b1120 !important;
    color: #f8fafc !important;
}

[data-bs-theme="dark"] header.bg-white,
[data-bs-theme="dark"] nav.navbar,
[data-bs-theme="dark"] .bg-white {
    background-color: #131c31 !important;
    color: #f8fafc !important;
    border-color: #222f49 !important;
}

[data-bs-theme="dark"] article.bg-white,
[data-bs-theme="dark"] .blog-card,
[data-bs-theme="dark"] .card {
    background-color: #131c31 !important;
    color: #f8fafc !important;
    border: 1px solid #222f49 !important;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5) !important;
}

[data-bs-theme="dark"] .blog-card:hover {
    border-color: #38d9a9 !important;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.75) !important;
}

[data-bs-theme="dark"] .navbar-brand-velog {
    color: #ffffff !important;
}

[data-bs-theme="dark"] .nav-link-anchor {
    color: #cbd5e1 !important;
}

[data-bs-theme="dark"] .nav-link-anchor:hover,
[data-bs-theme="dark"] .nav-link-anchor.active {
    color: #38d9a9 !important;
    background-color: rgba(32, 201, 151, 0.15) !important;
}

[data-bs-theme="dark"] .border,
[data-bs-theme="dark"] .border-top,
[data-bs-theme="dark"] .border-bottom,
[data-bs-theme="dark"] .border-start,
[data-bs-theme="dark"] .border-end {
    border-color: #222f49 !important;
}

[data-bs-theme="dark"] .text-muted,
[data-bs-theme="dark"] .text-secondary {
    color: #94a3b8 !important;
}

[data-bs-theme="dark"] .text-dark,
[data-bs-theme="dark"] .text-body {
    color: #f8fafc !important;
}

[data-bs-theme="dark"] .post-header-title {
    color: #ffffff !important;
}

[data-bs-theme="dark"] .post-header-subtitle {
    color: #94a3b8 !important;
}

[data-bs-theme="dark"] .post-content-body {
    color: #e2e8f0 !important;
}

[data-bs-theme="dark"] .post-content-body h2 {
    color: #ffffff !important;
    border-bottom: 2px solid #222f49 !important;
}

[data-bs-theme="dark"] .post-content-body h3 {
    color: #ffffff !important;
}

[data-bs-theme="dark"] .post-content-body p,
[data-bs-theme="dark"] .post-content-body li {
    color: #cbd5e1 !important;
}

[data-bs-theme="dark"] .post-content-body blockquote {
    background: #0b1120 !important;
    border-left-color: #20c997 !important;
    color: #cbd5e1 !important;
}

[data-bs-theme="dark"] .post-content-body code:not(pre code) {
    background-color: #1e293b !important;
    color: #38d9a9 !important;
}

[data-bs-theme="dark"] .post-content-body pre {
    background: #0f172a !important;
    border-color: #334155 !important;
    color: #f1f5f9 !important;
}

[data-bs-theme="dark"] .post-content-body th {
    background-color: #0b1120 !important;
    color: #ffffff !important;
}

/* Reading Time Badge in Dark Mode */
[data-bs-theme="dark"] .reading-time-badge {
    background-color: #1e293b !important;
    border: 1px solid #334155 !important;
    color: #cbd5e1 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35) !important;
}

[data-bs-theme="dark"] .reading-time-badge i {
    color: #38d9a9 !important;
}

[data-bs-theme="dark"] .reading-time-badge .reading-time-text {
    color: #e2e8f0 !important;
}

[data-bs-theme="dark"] .reading-time-badge .reading-time-text strong {
    color: #ffffff !important;
    font-weight: 700;
}

[data-bs-theme="dark"] .reading-time-badge .reading-time-dot,
[data-bs-theme="dark"] .reading-time-badge .reading-time-count {
    color: #94a3b8 !important;
}

/* Tag Pills in Dark Mode */
[data-bs-theme="dark"] .tag-pill,
[data-bs-theme="dark"] a.tag-pill {
    background-color: rgba(32, 201, 151, 0.15) !important;
    color: #38d9a9 !important;
    border: 1px solid rgba(32, 201, 151, 0.35) !important;
}

[data-bs-theme="dark"] .tag-pill:hover,
[data-bs-theme="dark"] .tag-pill.active,
[data-bs-theme="dark"] a.tag-pill:hover,
[data-bs-theme="dark"] a.tag-pill.active {
    background-color: #20c997 !important;
    color: #ffffff !important;
    border-color: #20c997 !important;
}

/* Like Heart Button in Dark Mode */
[data-bs-theme="dark"] .btn-like-heart {
    background-color: #0b1120 !important;
    border-color: #222f49 !important;
    color: #f8fafc !important;
}

/* Social Share Bar in Dark Mode */
[data-bs-theme="dark"] .social-share-container {
    background-color: #0b1120 !important;
    border-color: #222f49 !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3) !important;
}

[data-bs-theme="dark"] .share-title-text {
    color: #f8fafc !important;
}

[data-bs-theme="dark"] .btn-copy-share-url {
    background-color: #131c31 !important;
    border-color: #222f49 !important;
    color: #e2e8f0 !important;
}

[data-bs-theme="dark"] .btn-copy-share-url:hover {
    background-color: #1e293b !important;
    border-color: #38d9a9 !important;
    color: #ffffff !important;
}

/* Post Reactions Card in Dark Mode */
[data-bs-theme="dark"] .post-reactions-card {
    background-color: #0b1120 !important;
    border-color: #222f49 !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3) !important;
}

[data-bs-theme="dark"] .reactions-heading {
    color: #f8fafc !important;
}

[data-bs-theme="dark"] .btn-reaction-item {
    background-color: #131c31 !important;
    border-color: #222f49 !important;
    color: #f8fafc !important;
}

[data-bs-theme="dark"] .btn-reaction-item .reaction-label {
    color: #f1f5f9 !important;
}

[data-bs-theme="dark"] .btn-reaction-item .count-badge {
    background-color: rgba(255, 255, 255, 0.08) !important;
    color: #38d9a9 !important;
    border-color: #334155 !important;
}

[data-bs-theme="dark"] .btn-reaction-item:hover {
    background-color: #1e293b !important;
    border-color: #20c997 !important;
}

[data-bs-theme="dark"] .btn-reaction-item.btn-success {
    background-color: #20c997 !important;
    border-color: #20c997 !important;
    color: #ffffff !important;
}

[data-bs-theme="dark"] .btn-reaction-item.btn-success .reaction-label {
    color: #ffffff !important;
}

[data-bs-theme="dark"] .btn-reaction-item.btn-success .count-badge {
    background-color: rgba(255, 255, 255, 0.25) !important;
    color: #ffffff !important;
    border-color: rgba(255, 255, 255, 0.4) !important;
}

/* Post Disclaimer & Newsletter in Dark Mode */
[data-bs-theme="dark"] .post-disclaimer-box {
    background-color: #0b1120 !important;
    border-color: #222f49 !important;
}

[data-bs-theme="dark"] .disclaimer-text {
    color: #e2e8f0 !important;
}

[data-bs-theme="dark"] .newsletter-card {
    background-color: #0b1120 !important;
    border-color: #222f49 !important;
}

[data-bs-theme="dark"] .newsletter-heading {
    color: #ffffff !important;
}

[data-bs-theme="dark"] .newsletter-subheading {
    color: #94a3b8 !important;
}

/* Related Posts in Dark Mode */
[data-bs-theme="dark"] .related-posts h5 {
    color: #ffffff !important;
}

[data-bs-theme="dark"] .related-posts .card {
    background-color: #0b1120 !important;
    border-color: #222f49 !important;
}

[data-bs-theme="dark"] .related-posts .card .text-body {
    color: #f8fafc !important;
}

[data-bs-theme="dark"] .related-posts .card .text-muted {
    color: #94a3b8 !important;
}

/* Sidebar Widgets in Dark Mode */
[data-bs-theme="dark"] .toc-container {
    background-color: #0b1120 !important;
    border-color: #222f49 !important;
}

[data-bs-theme="dark"] .toc-link {
    color: #94a3b8 !important;
}

[data-bs-theme="dark"] .toc-link:hover,
[data-bs-theme="dark"] .toc-link.active {
    color: #38d9a9 !important;
}

[data-bs-theme="dark"] .sidebar-widget-item {
    background-color: #0b1120 !important;
    border: 1px solid #222f49 !important;
    color: #f1f5f9 !important;
}

[data-bs-theme="dark"] .sidebar-widget-item:hover {
    background-color: #1a253c !important;
    border-color: #38d9a9 !important;
    color: #38d9a9 !important;
    transform: translateX(3px);
}

[data-bs-theme="dark"] .sidebar-widget-item i {
    color: #38d9a9 !important;
}

[data-bs-theme="dark"] .widget-count-badge {
    background-color: #1a253c !important;
    color: #38d9a9 !important;
    border: 1px solid #222f49 !important;
}

[data-bs-theme="dark"] a.small.d-block,
[data-bs-theme="dark"] #right-sidebar-popular-posts a {
    color: #f1f5f9 !important;
}

[data-bs-theme="dark"] a.small.d-block:hover,
[data-bs-theme="dark"] #right-sidebar-popular-posts a:hover {
    color: #38d9a9 !important;
}

/* Forms, Modals & Dropdowns in Dark Mode */
[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select,
[data-bs-theme="dark"] .input-group-text {
    background-color: #0b1120 !important;
    border-color: #222f49 !important;
    color: #f8fafc !important;
}

[data-bs-theme="dark"] .form-control:focus,
[data-bs-theme="dark"] .form-select:focus {
    background-color: #0b1120 !important;
    border-color: var(--primary-color) !important;
    color: #f8fafc !important;
    box-shadow: 0 0 0 0.25rem rgba(32, 201, 151, 0.25) !important;
}

[data-bs-theme="dark"] .dropdown-menu {
    background-color: #131c31 !important;
    border-color: #222f49 !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6) !important;
}

[data-bs-theme="dark"] .dropdown-item {
    color: #cbd5e1 !important;
}

[data-bs-theme="dark"] .dropdown-item:hover,
[data-bs-theme="dark"] .dropdown-item:focus {
    background-color: #1e293b !important;
    color: #ffffff !important;
}

[data-bs-theme="dark"] .modal-content {
    background-color: #131c31 !important;
    color: #f8fafc !important;
    border-color: #222f49 !important;
}

/* Dark Mode Nav Buttons */
[data-bs-theme="dark"] .btn-theme-toggle {
    background-color: #131c31 !important;
    border-color: #222f49 !important;
    color: #f8fafc !important;
}

[data-bs-theme="dark"] .btn-theme-toggle:hover {
    background-color: #1e293b !important;
    border-color: #38d9a9 !important;
    color: #38d9a9 !important;
}

[data-bs-theme="dark"] .btn-nav-login {
    background-color: rgba(32, 201, 151, 0.18) !important;
    border: 1.5px solid #38d9a9 !important;
    color: #38d9a9 !important;
    font-weight: 700 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3) !important;
}

[data-bs-theme="dark"] .btn-nav-login:hover {
    background-color: #20c997 !important;
    border-color: #20c997 !important;
    color: #0b1120 !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(32, 201, 151, 0.5) !important;
}

[data-bs-theme="dark"] .btn-user-profile {
    background-color: #131c31 !important;
    border-color: #222f49 !important;
    color: #f8fafc !important;
}

.fixed-bottom-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1020;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid #e9ecef;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.03);
    transition: background-color 0.25s ease, border-color 0.25s ease;
}

[data-bs-theme="dark"] footer,
[data-bs-theme="dark"] .fixed-bottom-footer {
    background-color: rgba(11, 17, 32, 0.95) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid #222f49 !important;
    color: #94a3b8 !important;
    box-shadow: 0 -2px 16px rgba(0, 0, 0, 0.4) !important;
}

/* ==========================================================
   Layout Constraints & Utility Helpers
   ========================================================== */
.max-width-container {
    max-width: var(--content-width, 1440px);
    width: 100%;
    margin-inline: auto;
}

.fs-7 {
    font-size: 0.78rem;
    letter-spacing: 0.03em;
}

#comment-list-container p {
    word-break: break-word;
}

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

.fade-in {
    animation: fadeIn 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ==========================================================
   4K & High-Resolution Displays Optimization (2K, QHD, 4K UHD)
   ========================================================== */

/* 1. Large Desktops & 2K (1920px ~ 2559px) */
@media (min-width: 1920px) {
    :root {
        --content-width: 1720px;
    }
    .max-width-container {
        max-width: 1720px;
        padding-left: 2rem !important;
        padding-right: 2rem !important;
    }
    .style-search-box {
        max-width: 480px !important;
    }
    .sticky-sidebar {
        top: 5rem !important;
        max-height: calc(100vh - 6rem);
    }
    .blog-card-img {
        height: 230px;
    }
    .post-header-title {
        font-size: 2.45rem;
    }
}

/* 2. QHD & Ultrawide (2560px ~ 3839px) */
@media (min-width: 2560px) {
    :root {
        --content-width: 2100px;
    }
    html {
        font-size: 17px;
    }
    .max-width-container {
        max-width: 2100px;
        padding-left: 2.5rem !important;
        padding-right: 2.5rem !important;
    }
    .style-search-box {
        max-width: 560px !important;
    }
    .navbar-brand-velog {
        font-size: 1.55rem;
    }
    .sticky-sidebar {
        top: 5.25rem !important;
        max-height: calc(100vh - 6.5rem);
    }
    .blog-card-img {
        height: 260px;
    }
    .post-header-title {
        font-size: 2.75rem;
    }
    .post-content-body {
        font-size: 1.15rem;
        line-height: 1.9;
    }
    .post-content-body pre {
        padding: 1.25rem;
        font-size: 0.98rem;
    }
}

/* 3. 4K Ultra HD (3840px and above) */
@media (min-width: 3840px) {
    :root {
        --content-width: 2600px;
    }
    html {
        font-size: 19px;
    }
    .max-width-container {
        max-width: 2600px;
        padding-left: 3.5rem !important;
        padding-right: 3.5rem !important;
    }
    .style-search-box {
        max-width: 680px !important;
    }
    .navbar-brand-velog {
        font-size: 1.75rem;
    }
    .sticky-sidebar {
        top: 5.75rem !important;
        max-height: calc(100vh - 7rem);
    }
    .blog-card-img {
        height: 300px;
    }
    .post-header-title {
        font-size: 3.1rem;
    }
    .post-content-body {
        font-size: 1.25rem;
        line-height: 1.95;
    }
    .post-content-body pre {
        padding: 1.5rem;
        font-size: 1.08rem;
        line-height: 1.8;
    }
}