@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    /* Light Mode Colors */
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-hover: #f8f9fa;
    --text-primary: #1a1a1a;
    --text-secondary: #374151;
    --text-tertiary: #6b7280;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
    
    /* Accent Colors */
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-purple: #8b5cf6;
    
    /* Code Block Colors - Light */
    --code-bg: #f6f8fa;
    --code-inline-text: #24292f;
    --code-comment: #6a737d;
    --code-keyword: #d73a49;
    --code-string: #032f62;
    --code-number: #005cc5;
    --code-function: #6f42c1;
    --code-variable: #e36209;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* Dark Mode Variables */
html.dark-mode {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-hover: #1c2128;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-tertiary: #8b949e;
    --text-muted: #6e7681;
    --border-color: #30363d;
    --shadow: rgba(0, 0, 0, 0.3);
    
    --accent-blue: #58a6ff;
    --accent-blue-hover: #79c0ff;
    --accent-purple: #a371f7;
    
    --code-bg: #0d1117;
    --code-inline-text: #ff7b72;
    --code-comment: #8b949e;
    --code-keyword: #ff7b72;
    --code-string: #a5d6ff;
    --code-number: #79c0ff;
    --code-function: #d2a8ff;
    --code-variable: #ffa657;
}

/* ============================================
   BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    position: relative;
    overflow-x: hidden;
}

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(ellipse 70% 55% at 5% 10%,  rgba(59, 130, 246, 0.22) 0%, transparent 55%),
        radial-gradient(ellipse 55% 50% at 95% 85%, rgba(139, 92, 246, 0.20) 0%, transparent 50%),
        radial-gradient(ellipse 45% 40% at 80% 10%,  rgba(99, 179, 237, 0.14) 0%, transparent 55%),
        radial-gradient(ellipse 40% 35% at 15% 90%, rgba(167, 105, 245, 0.13) 0%, transparent 50%);
    animation: bgPulse 12s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0%   { opacity: 0.7; transform: scale(1)    translate(0,     0); }
    33%  { opacity: 1;   transform: scale(1.06) translate(1.5%, -1.2%); }
    66%  { opacity: 0.8; transform: scale(0.97) translate(-1.2%, 1.5%); }
    100% { opacity: 1;   transform: scale(1.04) translate(0.8%,  0.8%); }
}

html.dark-mode body::after {
    background:
        radial-gradient(ellipse 70% 55% at 5% 10%,  rgba(88, 166, 255, 0.26) 0%, transparent 55%),
        radial-gradient(ellipse 55% 50% at 95% 85%, rgba(163, 113, 247, 0.24) 0%, transparent 50%),
        radial-gradient(ellipse 45% 40% at 80% 10%,  rgba(56, 189, 248, 0.16) 0%, transparent 55%),
        radial-gradient(ellipse 40% 35% at 15% 90%, rgba(192, 132, 252, 0.16) 0%, transparent 50%);
}

/* Floating dots canvas */
#bg-canvas {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 1;
}

html.dark-mode #bg-canvas {
    opacity: 1;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    position: relative;
    z-index: 1000;
    box-shadow: 0 1px 3px var(--shadow);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: filter 0.25s ease;
}

.logo:hover {
    filter: brightness(1.25) drop-shadow(0 0 8px rgba(88, 166, 255, 0.45));
}

.logo-prefix {
    color: var(--accent-blue);
    font-weight: 400;
    opacity: 0.75;
    margin-right: 0.1em;
}

.logo-text {
    background: linear-gradient(100deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-cursor {
    display: inline-block;
    width: 0.55em;
    height: 1.05em;
    background: #e53e3e;
    margin-left: 3px;
    border-radius: 2px;
    flex-shrink: 0;
    animation: logo-blink 1.1s step-end infinite;
}

.logo-cursor.typing {
    animation: none;
    opacity: 1;
}

@keyframes logo-blink {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Navigation Links */
.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
}

.nav-links a {
    color: var(--text-tertiary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Social Links */
.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
}

.social-links a:hover {
    color: var(--text-primary);
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    color: var(--text-tertiary);
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
}

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

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

.theme-toggle .moon-icon {
    display: block;
}

html.dark-mode .theme-toggle .sun-icon {
    display: block;
}

html.dark-mode .theme-toggle .moon-icon {
    display: none;
}

/* ============================================
   SEARCH
   ============================================ */
.search-container {
    max-width: 1200px;
    margin: 0.75rem auto 0;
    padding: 0 var(--spacing-lg);
}

#searchInput {
    width: 100%;
    padding: 0.625rem var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition-fast);
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

#searchInput::placeholder {
    color: var(--text-muted);
}

#searchInput:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Filter Container */
.filter-container {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
    align-items: center;
}

.year-filter,
.month-filter {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    outline: none;
    transition: all var(--transition-fast);
    font-family: 'Inter', sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    min-width: 120px;
}

html.dark-mode .year-filter,
html.dark-mode .month-filter {
    background: var(--bg-secondary);
}

.year-filter:hover:not(:disabled),
.month-filter:hover:not(:disabled) {
    border-color: var(--accent-blue);
}

.year-filter:focus,
.month-filter:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.month-filter:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-hover);
}

.clear-filters-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: 'Inter', sans-serif;
    font-weight: 500;
}

.clear-filters-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
    max-width: 1200px;
    margin: var(--spacing-lg) auto;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: 0 1px 3px var(--shadow);
    /* 'visible' (not 'hidden') so the article's sticky TOC sidebar can pin while scrolling */
    overflow: visible;
}

/* ============================================
   POSTS LIST
   ============================================ */
.posts-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.post-card {
    background: var(--bg-secondary);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
}

.post-card::before {
    content: '';
    position: absolute;
    left: calc(var(--spacing-lg) * -1);
    top: 0;
    width: 4px;
    height: 0;
    background: linear-gradient(180deg, var(--accent-blue), var(--accent-purple));
    transition: height var(--transition-normal);
    border-radius: 0 2px 2px 0;
}

.post-card:hover {
    background: var(--bg-hover);
    transform: translateX(8px);
    padding-left: var(--spacing-md);
}

.post-card:hover::before {
    height: 100%;
}

.post-card:hover h3 {
    color: var(--accent-blue);
}

.post-card:hover .category-badge {
    transform: translateY(-2px);
}

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

.post-info {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.post-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Category Badges */
.category-badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-normal);
}

.category-badge.research {
    background-color: #dbeafe;
    color: #1e40af;
}

.category-badge.blogs {
    background-color: #fce7f3;
    color: #9f1239;
}

.category-badge.ctf {
    background-color: #dcfce7;
    color: #166534;
}

.post-date {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.post-card h3 {
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0.125rem 0;
    line-height: 1.3;
    transition: color var(--transition-normal);
}

.post-description {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    line-height: 1.5;
    margin: 0;
}

/* Post Tags */
.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-top: 0.5rem;
}

.tag-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border: 1.5px solid rgba(59, 130, 246, 0.3);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-blue);
    transition: all var(--transition-fast);
    letter-spacing: 0.2px;
    text-transform: lowercase;
}

.tag-badge::before {
    margin-right: 0.2rem;
    opacity: 0.7;
    font-weight: 500;
}

.tag-badge:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.2));
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(59, 130, 246, 0.2);
}

html.dark-mode .tag-badge {
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.15), rgba(163, 113, 247, 0.15));
    border-color: rgba(88, 166, 255, 0.4);
    color: var(--accent-blue);
}

html.dark-mode .tag-badge:hover {
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.25), rgba(163, 113, 247, 0.25));
    border-color: var(--accent-blue);
    box-shadow: 0 4px 8px rgba(88, 166, 255, 0.3);
}

/* ============================================
   POST CONTENT
   ============================================ */
.post-content {
    background: var(--bg-secondary);
    padding: var(--spacing-lg) 0;
}

.back-btn {
    background: var(--bg-hover);
    color: var(--text-primary);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.back-btn:hover {
    background: var(--border-color);
}

/* ============================================
   POST LAYOUT (TOC SIDEBAR + ARTICLE)
   ============================================ */
.post-layout {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xl);
}

.post-layout #articleContent {
    flex: 1 1 auto;
    min-width: 0; /* allow code blocks to scroll instead of stretching the flex item */
}

/* Sticky left column: keeps "Back to list" pinned together with the TOC */
.post-sidebar {
    flex: 0 0 230px;
    width: 230px;
    position: sticky;
    top: var(--spacing-lg);
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
}

/* When there's no TOC, shrink the column to the button so it doesn't waste space */
.post-sidebar:not(:has(.has-toc)) {
    flex: 0 0 auto;
    width: auto;
}

.toc-sidebar {
    display: none;
}

.toc-sidebar.has-toc {
    display: block;
    padding-right: var(--spacing-md);
    border-right: 1px solid var(--border-color);
    text-align: left;
}

.toc-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.toc-nav {
    display: block;
}

.toc-link {
    display: block;
    width: 100%;
    text-align: left;
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 0.85rem;
    line-height: 1.4;
    padding: 0.3rem 0 0.3rem 0.6rem;
    border-left: 2px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
    /* Wrap long headings onto multiple lines instead of truncating with an ellipsis */
    white-space: normal;
    overflow-wrap: anywhere;
}

/* Indent by relative depth (0 = shallowest heading in the document) */
.toc-d0 { padding-left: 0.6rem; }
.toc-d1 { padding-left: 1.4rem; }
.toc-d2 { padding-left: 2.2rem; font-size: 0.8rem; }
.toc-d3 { padding-left: 3.0rem; font-size: 0.8rem; }

.toc-link:hover {
    color: var(--text-primary);
    border-left-color: var(--border-color);
}

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

/* ============================================
   ARTICLE CONTENT
   ============================================ */
#articleContent {
    max-width: 1000px;
}

/* The first heading/paragraph sits flush with the sidebar top
   (kills the gap created by h2's margin-top when a post opens with ## ) */
#articleContent > :first-child {
    margin-top: 0;
}

#articleContent h1 {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
}

#articleContent h2 {
    font-size: 1.75rem;
    margin-top: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 600;
}

#articleContent h3 {
    font-size: 1.375rem;
    margin-top: var(--spacing-lg);
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
}

#articleContent h4 {
    font-size: 1.125rem;
    margin-top: var(--spacing-md);
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

#articleContent p {
    margin-bottom: 1.25rem;
    line-height: 1.75;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

#articleContent ul,
#articleContent ol {
    margin-left: 1.5rem;
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

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

#articleContent blockquote {
    border-left: 4px solid var(--accent-blue);
    padding-left: var(--spacing-md);
    margin: 1.5rem 0;
    color: var(--text-tertiary);
    font-style: italic;
}

#articleContent a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

#articleContent a:hover {
    color: var(--accent-blue-hover);
    text-decoration: underline;
}

#articleContent img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    margin: 1.5rem 0;
}

/* ============================================
   CODE BLOCKS
   ============================================ */
/* Inline code */
#articleContent code {
    background-color: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--code-inline-text);
    border: 1px solid var(--border-color);
}

/* Code blocks */
#articleContent pre {
    background-color: var(--code-bg) !important;
    padding: 1.25rem;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin-bottom: 1.5rem;
    line-height: 1.6;
    border: 1px solid var(--border-color);
}

#articleContent pre code {
    background-color: transparent !important;
    color: inherit;
    padding: 0;
    border: none;
    font-size: 0.875rem;
    line-height: 1.6;
    display: block;
}

#articleContent pre[class*="language-"] {
    background: var(--code-bg) !important;
    border: 1px solid var(--border-color);
}

#articleContent code[class*="language-"] {
    color: var(--text-primary);
    text-shadow: none;
}

/* Prism Syntax Colors */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
    color: var(--code-comment) !important;
    font-style: italic;
}

.token.punctuation {
    color: var(--text-primary) !important;
}

.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol,
.token.deleted {
    color: var(--code-number) !important;
}

.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
    color: var(--code-string) !important;
}

.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string {
    color: var(--text-primary) !important;
}

.token.atrule,
.token.attr-value,
.token.keyword {
    color: var(--code-keyword) !important;
    font-weight: 500;
}

.token.function,
.token.class-name {
    color: var(--code-function) !important;
}

.token.regex,
.token.important,
.token.variable {
    color: var(--code-variable) !important;
}

/* Copy Button */
.copy-btn {
    position: absolute;
    top: 0.625rem;
    right: 0.625rem;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 0.375rem 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    opacity: 0;
    z-index: 10;
}

#articleContent pre:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.copy-btn.copied {
    color: #22c55e;
    border-color: #22c55e;
    background: rgba(34, 197, 94, 0.1);
    opacity: 1;
}


.no-posts {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
    font-size: 1rem;
}

/* ============================================
   PAGINATION
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 2rem 0 1rem;
    flex-wrap: wrap;
}

.page-btn {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.45rem 0.85rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
    min-width: 38px;
    text-align: center;
}

.page-btn:hover:not(.disabled):not(.active) {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

.page-btn.active {
    background: var(--accent-blue);
    color: #fff;
    border-color: var(--accent-blue);
    font-weight: 600;
    cursor: default;
}

.page-btn.disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.page-ellipsis {
    color: var(--text-muted);
    font-size: 0.875rem;
    padding: 0.45rem 0.25rem;
    user-select: none;
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-hover);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ============================================
   HAMBURGER MENU BUTTON (hidden on desktop)
   ============================================ */
.menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--text-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.menu-btn:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.menu-btn .icon-close {
    display: none;
}

.menu-btn.open .icon-menu {
    display: none;
}

.menu-btn.open .icon-close {
    display: block;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    /* Show hamburger */
    .menu-btn {
        display: flex;
    }

    /* Nav row */
    nav {
        padding: 0 var(--spacing-md);
    }

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

    .social-links {
        gap: var(--spacing-sm);
    }

    /* Nav links: hidden by default, dropdown when open */
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 6px 16px var(--shadow);
        z-index: 999;
        gap: 0;
        padding: 0.25rem 0;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 0.875rem var(--spacing-lg);
        border-radius: 0;
        font-size: 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links li:last-child a {
        border-bottom: none;
    }

    /* Logo */
    .logo {
        font-size: 0.95rem;
    }

    /* Search */
    .search-container {
        padding: 0 var(--spacing-md);
    }

    /* Container */
    .container {
        padding: var(--spacing-md);
        margin: 0.75rem;
        border-radius: var(--radius-md);
    }

    /* Disable translateX slide on post cards (touch-unfriendly) */
    .post-card:hover {
        transform: none;
        padding-left: 0;
    }

    /* Stack layout and hide TOC sidebar on small screens */
    .post-layout {
        display: block;
    }

    .post-sidebar {
        position: static;
        width: auto;
        max-height: none;
        overflow: visible;
    }

    .toc-sidebar.has-toc {
        display: none;
    }

    /* Article */
    #articleContent {
        max-width: 100%;
    }

    #articleContent h1 {
        font-size: 1.75rem;
    }

    #articleContent h2 {
        font-size: 1.375rem;
    }

    #articleContent h3 {
        font-size: 1.125rem;
    }

    #articleContent pre {
        padding: var(--spacing-md);
        font-size: 0.8125rem;
    }

    /* Back button */
    .back-btn {
        width: 100%;
        text-align: center;
    }

    /* Filters */
    .filter-container {
        flex-direction: column;
        gap: 0.5rem;
    }

    .year-filter,
    .month-filter,
    .clear-filters-btn {
        width: 100%;
        min-width: auto;
    }
}

@media (max-width: 480px) {
    nav {
        padding: 0 0.75rem;
    }

    .logo {
        font-size: 1.05rem;
    }

    .search-container {
        padding: 0 0.75rem;
    }

    .container {
        margin: 0.5rem;
        padding: 0.875rem;
    }

    #articleContent h1 {
        font-size: 1.5rem;
    }

    #articleContent h2 {
        font-size: 1.25rem;
    }

    #articleContent p,
    #articleContent ul,
    #articleContent ol {
        font-size: 0.9rem;
    }
}