/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */
:root {
    /* Colors - Background */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-bg-elevated: rgba(0, 0, 0, 0.03);
    
    /* Colors - Border */
    --color-border-subtle: #e5e7eb;
    --color-border-default: #d1d5db;
    --color-border-strong: #111827;
    
    /* Colors - Text */
    --color-text-primary: #111827;
    --color-text-secondary: #374151;
    --color-text-muted: #6b7280;
    
    /* Colors - Accent (Terminal Green) */
    --color-accent: #1877F2;
    --color-accent-rgb: 24, 119, 242;
    --color-accent-hover: rgba(var(--color-accent-rgb), 0.1);
    --color-accent-glow: rgba(var(--color-accent-rgb), 0.3);
    --color-accent-scanline: rgba(var(--color-accent-rgb), 0.03);
    
    /* Colors - Glitch Effect */
    --color-glitch-cyan: rgba(0, 255, 255, 0.8);
    --color-glitch-magenta: rgba(255, 0, 255, 0.8);
    
    /* Typography */
    --font-family-mono: 'JetBrains Mono', 'Courier New', 'Consolas', monospace;
    /* Note: If using web fonts in the future, add font-display: swap in @font-face */
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-xs: 13px;
    --font-size-lg: 22px;
    --font-size-xl: 32px;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 20px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    --spacing-3xl: 40px;
    
    /* Layout */
    --container-max-width: 680px;
    --border-radius-sm: 4px;
    --border-radius-full: 50%;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
    --transition-slow: 0.8s ease-in;
    
    /* Sizes */
    --profile-size: 120px;
    --profile-size-mobile: 100px;
    --icon-size: 24px;
    --icon-size-social: 28px;
    --icon-size-social-mobile: 24px;
}

/* ==========================================================================
   Dark Theme
   ========================================================================== */
[data-theme="dark"] {
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-elevated: rgba(255, 255, 255, 0.05);

    --color-border-subtle: #1f1f1f;
    --color-border-default: #2a2a2a;
    --color-border-strong: #e5e7eb;

    --color-text-primary: #e5e7eb;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;

    --color-accent-scanline: rgba(var(--color-accent-rgb), 0.02);
}

[data-theme="dark"] html,
[data-theme="dark"] {
    scrollbar-color: rgba(255, 255, 255, 0.15) var(--color-bg-primary);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.2) var(--color-bg-primary);
}

/* Global scrollbar styles */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(var(--color-accent-rgb), 0.4);
}

::-webkit-scrollbar-corner {
    background: var(--color-bg-primary);
}

/* ==========================================================================
   Body & Background
   ========================================================================== */
body {
    font-family: var(--font-family-mono);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--color-bg-primary);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            0deg,
            var(--color-accent-scanline) 0px,
            transparent 2px,
            transparent 4px,
            var(--color-accent-scanline) 4px
        );
    pointer-events: none;
    animation: scanlines 8s linear infinite;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes scanlines {
    0% { transform: translateY(0); }
    100% { transform: translateY(10px); }
}

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

/* Page Transitions */
@keyframes pageIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

main,
.post-layout {
    animation: pageIn 0.3s ease-out;
}

body.page-exit main,
body.page-exit .post-layout {
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.2s ease-in, transform 0.2s ease-in;
}

@keyframes glitch {
    0%, 90%, 100% {
        text-shadow: 
            0 0 10px rgba(var(--color-accent-rgb), 0.8),
            0 0 20px rgba(var(--color-accent-rgb), 0.5),
            0 0 30px rgba(var(--color-accent-rgb), 0.3);
    }
    95% {
        text-shadow: 
            2px 0 10px var(--color-glitch-cyan),
            -2px 0 10px var(--color-glitch-magenta),
            0 0 20px rgba(var(--color-accent-rgb), 0.5);
    }
}

/* ==========================================================================
   Accessibility - Skip Link
   ========================================================================== */
.skip-link {
    position: absolute;
    left: -9999px;
    z-index: 999;
    padding: 1em;
    background: var(--color-accent);
    color: var(--color-bg-primary);
    text-decoration: none;
    font-weight: bold;
}

.skip-link:focus {
    left: 10px;
}

/* ==========================================================================
   Main Container
   ========================================================================== */
.linktree-container {
    max-width: var(--container-max-width);
    width: 100%;
    text-align: center;
    animation: fadeIn var(--transition-slow);
    position: relative;
    z-index: 1;
}

/* ==========================================================================
   Profile Section
   ========================================================================== */
.profile-image {
    width: var(--profile-size);
    height: var(--profile-size);
    border-radius: var(--border-radius-full);
    border: 3px solid var(--color-border-subtle);
    margin: 0 auto var(--spacing-xl);
    object-fit: cover;
    object-position: center 20%;
    transition: transform var(--transition-fast);
}

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

/* ==========================================================================
   Typography
   ========================================================================== */
h1 {
    color: var(--color-text-primary);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 2px;
}

.bio {
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
}

/* ==========================================================================
   Links Container
   ========================================================================== */
.links-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
}

/* ==========================================================================
   Link Buttons
   ========================================================================== */
.link-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border-default);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.link-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--color-accent-glow), transparent);
    transition: left var(--transition-medium);
}

.link-button:hover::before {
    left: 100%;
}

.link-button:hover {
    transform: translateX(4px);
    background: var(--color-accent-hover);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.link-button:active {
    transform: translateX(2px);
}

.link-button:focus-visible,
.social-icon:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

/* Featured Button Variant */
.link-button--featured {
    border-color: var(--color-border-strong);
    background: var(--color-bg-elevated);
}

.link-button--featured:hover {
    border-color: var(--color-accent);
    background: var(--color-accent-hover);
}

/* ==========================================================================
   Social Icons
   ========================================================================== */
.social-icons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.social-icon {
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    display: inline-block;
}

.social-icon:hover {
    color: var(--color-accent);
    transform: translateY(-4px) scale(1.1) rotate(5deg);
}

.social-icon svg {
    width: var(--icon-size-social);
    height: var(--icon-size-social);
    fill: currentColor;
}

/* ==========================================================================
   Responsive - Mobile
   ========================================================================== */
@media (max-width: 480px) {
    body {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .linktree-container {
        padding: 0 var(--spacing-xs);
    }
    
    .profile-image {
        width: var(--profile-size-mobile);
        height: var(--profile-size-mobile);
    }

    h1 {
        font-size: var(--font-size-lg);
        line-height: 1.3;
        letter-spacing: 1px;
        margin-bottom: var(--spacing-sm);
    }

    .bio {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }

    .link-button {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-xs);
        letter-spacing: 0.5px;
    }

    .social-icon svg {
        width: var(--icon-size-social-mobile);
        height: var(--icon-size-social-mobile);
    }
}

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

.error-emoji {
    font-size: 4rem;
    margin-bottom: var(--spacing-xl);
    line-height: 1;
}

.error-title {
    color: var(--color-text-primary);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

@media (max-width: 480px) {
    .error-emoji {
        font-size: 3rem;
    }
    
    .error-title {
        font-size: var(--font-size-lg);
    }
}

/* ==========================================================================
   Accessibility - Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================================================
   Blog Pages
   ========================================================================== */
.blog-page,
.post-page {
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    min-height: 100vh;
    padding: 0;
    justify-content: flex-start;
    align-items: stretch;
}

.blog-page {
    padding-left: 0;
    padding-right: 0;
}

.blog-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-lg);
    padding-bottom: 80px;
    flex: 1;
}

.post-container {
    max-width: var(--container-max-width);
    padding: var(--spacing-xl) var(--spacing-lg);
    padding-bottom: 80px;
    width: 100%;
}

/* ==========================================================================
   Site Header (Sticky)
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-subtle);
    margin-bottom: var(--spacing-2xl);
    width: 100%;
}

.site-header-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

[data-theme="dark"] .site-header {
    background: rgba(10, 10, 10, 0.85);
}

.site-header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.site-header .header-logo {
    color: var(--color-text-primary);
    font-family: var(--font-family-mono);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -.02em;
    display: flex;
    align-items: center;
}

.site-header .logo-subtitle {
    font-size: 12px;
    font-weight: 400;
    color: var(--color-text-muted);
    transform: translate(8px, 0px);
}

.site-header .header-logo .logo-subtitle {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}

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

.site-header .nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-family: var(--font-family-mono);
    transition: color 0.2s ease;
    letter-spacing: 0.5px;
}

.site-header .nav-link:hover {
    color: var(--color-accent);
}

.site-header .nav-rss {
    display: inline-flex;
    align-items: center;
}

/* Header Top Bar */
.header-top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.header-logo {
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    letter-spacing: 0.5px;
}

/* Header Nav Row (subpages) */
.header-nav-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

/* Theme Toggle */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid var(--color-border-subtle);
    border-radius: 6px;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 6px;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

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

[data-theme="dark"] .theme-toggle .icon-sun {
    display: none;
}

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

/* Home Nav */
.home-nav {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.home-nav .nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-family: var(--font-mono);
    transition: color 0.2s ease;
    letter-spacing: 0.5px;
}

.home-nav .nav-link:hover {
    color: var(--color-accent);
}

.home-nav .nav-rss {
    display: inline-flex;
    align-items: center;
}

/* Blog Header */
.blog-header {
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid var(--color-border-subtle);
}

.blog-header h1 {
    color: var(--color-text-primary);
    font-size: clamp(36px, 6vw, 56px);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -1.5px;
    font-weight: 800;
    line-height: 1.1;
}

.blog-header .bio {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    max-width: 640px;
    line-height: 1.6;
    margin: 0;
}

.back-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--font-size-sm);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-bottom: var(--spacing-2xl);
    transition: color var(--transition-fast);
    font-weight: 500;
}

.back-link:hover {
    color: var(--color-accent);
}

/* Posts List */
.posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
}

.post-card {
    position: relative;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-subtle);
    transition: border-color var(--transition-fast);
    font-family: 'Inter', sans-serif;
}

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

.post-card:hover {
    border-color: var(--color-border-default);
}

.post-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.post-date {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    display: block;
    font-weight: 400;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}
.post-link > .post-date {
    margin-bottom: 0.4rem;
}

.post-title {
    color: var(--color-text-primary);
    font-size: clamp(20px, 3vw, 26px);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    transition: color var(--transition-fast);
    line-height: 1.3;
    letter-spacing: -0.5px;
}

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

.post-excerpt {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    max-width: 720px;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    display: inline-flex;
    align-items: center;
    color: var(--color-accent);
    font-family: var(--font-family-mono);
    font-size: 12px;
    font-weight: 500;
    padding: 2px 10px;
    border: 1px solid rgba(var(--color-accent-rgb), 0.3);
    border-radius: 24px;
    background: rgba(var(--color-accent-rgb), 0.06);
    text-transform: lowercase;
    letter-spacing: 0;
    line-height: 1.6;
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
}

.tag::before {
    content: none;
}

.post-card:hover .tag {
    background: rgba(var(--color-accent-rgb), 0.12);
    border-color: rgba(var(--color-accent-rgb), 0.5);
}

.no-posts {
    color: var(--color-text-muted);
    text-align: center;
    padding: var(--spacing-3xl);
    border: 1px dashed var(--color-border-subtle);
    border-radius: 8px;
}

/* Single Post */
.post-header {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border-subtle);
    position: relative;
}

.post-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.post-header h1 {
    color: var(--color-text-primary);
    font-family: 'Inter', sans-serif;
    font-size: clamp(36px, 6vw, 42px);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.post-meta-line {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.post-meta-line .post-category {
    color: var(--color-accent);
    font-weight: 600;
}

.post-meta-line .meta-separator {
    opacity: 0.4;
}

.post-meta-line .post-date,
.post-meta-line .reading-time {
    color: var(--color-text-muted);
}

.post-tags--footer {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border-subtle);
}

/* Post Layout - Centered */
.post-layout {
    display: flex;
    justify-content: center;
    max-width: 100%;
    margin: 0 auto;
    gap: 0;
    padding: var(--spacing-3xl) var(--spacing-lg);
    flex: 1;
}

/* TOC Sidebar - Desktop (hidden by default) */
.toc-sidebar {
    display: none !important;
    width: 200px;
    flex-shrink: 0;
    order: 2;
    opacity: 1;
}

/* Mobile: single column layout */
@media (max-width: 1099px) {
    .post-layout {
        flex-direction: column;
        max-width: var(--container-max-width);
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .post-layout .post-container {
        max-width: 100%;
        width: 100%;
        padding: 0;
    }
}

@media (min-width: 1100px) {
    .toc-mobile {
        display: none !important;
    }
    
    .post-layout .post-container {
        flex: none;
        max-width: 800px;
        margin: 0 auto;
        padding: 0;
        width: 100%;
    }
}

.toc-sticky {
    position: sticky;
    top: var(--spacing-xl);
    max-height: calc(100vh - 60px);
    display: flex;
    flex-direction: column;
}

.toc-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--spacing-sm) 0;
    color: var(--color-text-muted);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--color-border-subtle);
    margin-bottom: var(--spacing-sm);
    flex-shrink: 0;
}

.toc-header .toc-icon {
    color: var(--color-accent);
    font-size: 12px;
}

.toc-nav {
    overflow-y: auto;
    flex: 1;
    padding-right: 4px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

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

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

.toc-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.toc-nav::-webkit-scrollbar-thumb:hover {
    background: rgba(var(--color-accent-rgb), 0.5);
}

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

.toc-nav > ul {
    border-left: 2px solid var(--color-border-subtle);
    padding-left: var(--spacing-sm);
}

.toc-nav li {
    margin: 2px 0;
}

.toc-nav a {
    display: block;
    padding: 4px 8px;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 11px;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    line-height: 1.4;
}

.toc-nav a:hover,
.toc-nav a.active {
    color: var(--color-accent);
    background: rgba(var(--color-accent-rgb), 0.05);
}

.toc-nav ul ul {
    padding-left: 8px;
    margin-top: 2px;
}

.toc-nav ul ul a {
    font-size: 10px;
    opacity: 0.85;
    padding: 3px 8px;
}

/* TOC Mobile - Collapsible */
.toc-mobile {
    margin-bottom: var(--spacing-2xl);
    border: 1px solid var(--color-border-subtle);
    border-radius: 8px;
    background: var(--color-bg-elevated);
    overflow: hidden;
    opacity: 1;
}

.toc-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    color: var(--color-text-primary);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toc-toggle:hover {
    background: rgba(var(--color-accent-rgb), 0.05);
    color: var(--color-accent);
}

.toc-icon {
    font-size: 14px;
    color: var(--color-accent);
}

.toc-chevron {
    width: 16px;
    height: 16px;
    margin-left: auto;
    transition: transform var(--transition-fast);
}

.toc-toggle[aria-expanded="true"] .toc-chevron {
    transform: rotate(180deg);
}

.toc-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.toc-content.open {
    max-height: 2000px;
    overflow-y: auto;
}

.toc-content nav {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

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

.toc-content > nav > ul {
    border-left: 2px solid var(--color-border-subtle);
    padding-left: var(--spacing-md);
}

.toc-content li {
    margin: var(--spacing-xs) 0;
}

.toc-content a {
    display: block;
    padding: 6px var(--spacing-sm);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.toc-content a:hover,
.toc-content a.active {
    color: var(--color-accent);
    background: rgba(var(--color-accent-rgb), 0.05);
}

.toc-content ul ul {
    padding-left: var(--spacing-md);
}

.toc-content ul ul a {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    opacity: 0.8;
}

/* ==========================================================================
   Inline TOC (Sumário)
   ========================================================================== */
.toc-inline {
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--color-border-subtle);
    border-radius: 8px;
    overflow: hidden;
}

.toc-inline-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: none;
    color: var(--color-text-primary);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.toc-inline-toggle:hover {
    background: var(--color-bg-elevated);
}

.toc-inline-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.toc-inline-chevron {
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
    transition: transform 0.2s ease;
}

.toc-inline-toggle[aria-expanded="true"] .toc-inline-chevron {
    transform: rotate(180deg);
}

.toc-inline-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.toc-inline-content.open {
    max-height: 2000px;
}

.toc-inline-content nav,
.toc-inline-content ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-inline-content > nav > ul {
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-md);
}

.toc-inline-content li {
    margin: 0;
}

.toc-inline-content a {
    display: block;
    padding: 6px 0;
    color: var(--color-text-muted);
    font-family: var(--font-family-mono);
    font-size: 13px;
    text-decoration: none;
    border-bottom: none;
    transition: color var(--transition-fast);
}

.toc-inline-content a:hover {
    color: var(--color-accent);
}

.toc-inline-content a.active {
    color: var(--color-accent);
    font-weight: 600;
}

.toc-inline-content ul ul {
    padding-left: var(--spacing-lg);
}

.toc-inline-content ul ul a {
    font-size: 12px;
    opacity: 0.85;
}

.post-content {
    color: var(--color-text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 19px;
    line-height: 1.8;
}

.post-content h2 {
    color: var(--color-text-primary);
    font-size: 28px;
    margin: 48px 0 var(--spacing-lg);
    position: relative;
}

.post-content h3 {
    color: var(--color-text-primary);
    font-size: 22px;
    margin: 36px 0 var(--spacing-md);
}

.post-content p {
    margin-bottom: 28px;
}

.post-content a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(var(--color-accent-rgb), 0.3);
    transition: border-color var(--transition-fast);
}

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

.post-content strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.post-content code {
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
    padding: 3px 8px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9em;
    font-family: var(--font-family-mono);
    border: 1px solid var(--color-border-subtle);
}

.post-content .highlight {
    margin: var(--spacing-xl) 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--color-border-subtle);
    position: relative;
}

.post-content .highlight::before {
    content: '';
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-md);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ff5f56;
    box-shadow: 14px 0 0 #ffbd2e, 28px 0 0 #27ca40;
    z-index: 1;
}

.post-content pre {
    margin: 0;
    border: none;
    border-radius: 0;
    padding: var(--spacing-lg);
    padding-top: calc(var(--spacing-lg) + 14px);
    overflow-x: auto;
}

.post-content pre.chroma {
    background: #f6f8fa;
}

[data-theme="dark"] .post-content pre.chroma {
    background: #1e1e1e;
}

.post-content .highlight pre code,
.post-content .highlight pre.chroma code {
    background: none;
    color: inherit;
    padding: 0;
    border: none;
    display: block;
    font-size: 0.9em;
}

.post-content .highlight .chroma {
    color: #24292e;
}

[data-theme="dark"] .post-content .highlight .chroma {
    color: #f8f8f2;
}

.post-content ul,
.post-content ol {
    margin: var(--spacing-lg) 0;
    padding-left: var(--spacing-xl);
}

.post-content li {
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.post-content ul li::marker {
    color: var(--color-accent);
}

.post-content blockquote {
    border-left: 3px solid var(--color-accent);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    background: var(--color-bg-elevated);
    border-radius: 0 8px 8px 0;
    color: var(--color-text-secondary);
    font-style: italic;
    position: relative;
}

.post-content blockquote::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: var(--spacing-sm);
    font-size: 48px;
    color: var(--color-accent);
    opacity: 0.3;
    font-family: Georgia, serif;
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: var(--spacing-xl) 0;
    border: 1px solid var(--color-border-subtle);
}

.post-content hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-subtle), transparent);
    margin: var(--spacing-3xl) 0;
}

/* Tables */
.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-xl) 0;
    font-size: var(--font-size-sm);
}

.post-content th,
.post-content td {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border-subtle);
    text-align: left;
}

.post-content th {
    background: var(--color-bg-secondary);
    color: var(--color-accent);
    font-weight: 600;
    text-transform: uppercase;
    font-size: var(--font-size-xs);
    letter-spacing: 0.5px;
}

.post-content tr:hover {
    background: var(--color-bg-elevated);
}

/* Details/Summary (Accordion) */
.post-content details {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: 8px;
    margin: var(--spacing-lg) 0;
    overflow: hidden;
}

.post-content summary {
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    font-weight: 600;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    list-style: none;
}

.post-content summary::-webkit-details-marker {
    display: none;
}

.post-content summary::before {
    content: '▶';
    font-size: 10px;
    color: var(--color-accent);
    transition: transform var(--transition-fast);
}

.post-content details[open] summary::before {
    transform: rotate(90deg);
}

.post-content summary:hover {
    background: rgba(var(--color-accent-rgb), 0.05);
    color: var(--color-accent);
}

.post-content details > *:not(summary) {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.post-content details > p:first-of-type {
    margin-top: 0;
}

/* Video Container */
.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
    margin: var(--spacing-xl) 0;
    border-radius: 8px;
    border: 1px solid var(--color-border-subtle);
}

.video-container iframe,
.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.post-content video {
    border-radius: 8px;
    border: 1px solid var(--color-border-subtle);
    margin: var(--spacing-xl) 0;
}

/* Figure & Figcaption */
.post-content figure {
    margin: var(--spacing-xl) 0;
    text-align: center;
}

.post-content figure img {
    margin: 0 auto;
    display: block;
}

.post-content figcaption {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-sm);
    font-style: italic;
}

/* Chips */
.chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin: var(--spacing-lg) 0;
}

.chip {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-subtle);
    border-radius: 20px;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

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

.chip--accent {
    background: rgba(var(--color-accent-rgb), 0.1);
    border-color: rgba(var(--color-accent-rgb), 0.3);
    color: var(--color-accent);
}

.chip--warning {
    background: rgba(255, 193, 7, 0.1);
    border-color: rgba(255, 193, 7, 0.3);
    color: #ffc107;
}

.chip--success {
    background: rgba(40, 167, 69, 0.1);
    border-color: rgba(40, 167, 69, 0.3);
    color: #28a745;
}

/* Callouts */
.callout {
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: 8px;
    border-left: 4px solid;
    background: var(--color-bg-elevated);
}

.callout strong {
    display: block;
    margin-bottom: 4px;
}

.callout--info {
    border-color: #17a2b8;
    background: rgba(23, 162, 184, 0.1);
}

.callout--info strong {
    color: #17a2b8;
}

.callout--warning {
    border-color: #ffc107;
    background: rgba(255, 193, 7, 0.1);
}

.callout--warning strong {
    color: #ffc107;
}

.callout--danger {
    border-color: #dc3545;
    background: rgba(220, 53, 69, 0.1);
}

.callout--danger strong {
    color: #dc3545;
}

.callout--success {
    border-color: #28a745;
    background: rgba(40, 167, 69, 0.1);
}

.callout--success strong {
    color: #28a745;
}

/* Definition Lists */
.post-content dl {
    margin: var(--spacing-lg) 0;
}

.post-content dt {
    color: var(--color-accent);
    font-weight: 600;
    margin-top: var(--spacing-md);
}

.post-content dt:first-child {
    margin-top: 0;
}

.post-content dd {
    color: var(--color-text-muted);
    margin-left: var(--spacing-lg);
    margin-top: 4px;
    padding-left: var(--spacing-md);
    border-left: 2px solid var(--color-border-subtle);
}

/* Keyboard Shortcuts */
.post-content kbd {
    display: inline-block;
    padding: 3px 8px;
    font-size: 12px;
    font-family: var(--font-family-mono);
    color: var(--color-text-primary);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-default);
    border-radius: 4px;
    box-shadow: 0 2px 0 var(--color-border-subtle);
}

/* Mark/Highlight */
.post-content mark {
    background: rgba(var(--color-accent-rgb), 0.2);
    color: var(--color-accent);
    padding: 2px 6px;
    border-radius: 3px;
}

/* Task Lists */
.post-content ul li input[type="checkbox"] {
    margin-right: var(--spacing-xs);
    accent-color: var(--color-accent);
}

/* Footnotes */
.post-content .footnotes {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border-subtle);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.post-content .footnotes ol {
    padding-left: var(--spacing-lg);
}

.post-content sup a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
}

/* Comments Section */
.comments-section {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-3xl);
    border-top: 1px solid var(--color-border-subtle);
}

.comments-title {
    color: var(--color-text-primary);
    font-size: clamp(20px, 3vw, 24px);
    margin-bottom: var(--spacing-xl);
}

#disqus_thread {
    background: var(--color-bg-elevated);
    padding: var(--spacing-xl);
    border-radius: 8px;
    border: 1px solid var(--color-border-subtle);
}

/* Disqus overrides */
#disqus_thread a {
    color: var(--color-accent) !important;
}

#disqus_thread iframe {
    border-radius: 4px;
}

/* Post Footer */
.post-footer {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.post-footer .back-link {
    margin-bottom: 0;
}

/* Reading Progress */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--color-accent);
    z-index: 1000;
    box-shadow: 0 0 10px var(--color-accent-glow);
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-subtle);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-fast);
    z-index: 999;
}

.scroll-to-top svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.scroll-to-top:hover {
    border-color: var(--color-accent);
    background: var(--color-bg-elevated);
    box-shadow: 0 0 20px var(--color-accent-hover);
}

.scroll-to-top:hover svg {
    color: var(--color-accent);
}

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

/* ==========================================================================
   Focus Mode Button
   ========================================================================== */
/* Focus mode button - hidden (focus layout is now default) */
.focus-mode-btn {
    display: none;
}

.focus-mode-btn svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.focus-mode-btn:hover {
    border-color: var(--color-accent);
    background: var(--color-bg-elevated);
    box-shadow: 0 0 20px var(--color-accent-hover);
}

.focus-mode-btn:hover svg {
    color: var(--color-accent);
}

/* Focus mode active state */
.focus-mode .focus-mode-btn {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.focus-mode .focus-mode-btn svg {
    color: white;
}

/* ==========================================================================
   Focus Mode State
   ========================================================================== */
.focus-mode .toc-sidebar {
    display: none !important;
}

.focus-mode .toc-mobile {
    display: none !important;
}

.focus-mode .post-nav,
.focus-mode .post-tags,
.focus-mode .reading-time,
.focus-mode .post-footer {
    opacity: 0.3;
    transition: opacity 0.3s ease;
}

.focus-mode .post-layout {
    max-width: 100% !important;
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
    justify-content: center;
    display: flex;
    gap: 0 !important;
}

.focus-mode .post-container {
    max-width: 800px !important;
    margin: 0 auto !important;
    padding-left: 0;
    padding-right: 0;
    flex: none !important;
    width: 100%;
}

.focus-mode .post-content {
    font-size: 19px;
    line-height: 1.8;
}

.focus-mode .post-content h2 {
    font-size: 28px;
    margin-top: 48px;
}

.focus-mode .post-content h3 {
    font-size: 22px;
    margin-top: 36px;
}

.focus-mode .post-content p {
    margin-bottom: 28px;
}

.focus-mode .reading-progress {
    height: 4px;
}

/* ==========================================================================
   Lab Page - GitHub Repos
   ========================================================================== */
.lab-page {
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    min-height: 100vh;
    padding: 0;
    justify-content: flex-start;
    align-items: stretch;
}

.lab-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-lg);
    padding-bottom: 80px;
    flex: 1;
}

.lab-header {
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid var(--color-border-subtle);
}

.lab-header h1 {
    color: var(--color-text-primary);
    font-size: clamp(36px, 6vw, 56px);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -1.5px;
    font-weight: 800;
    line-height: 1.1;
}

.lab-header .bio {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    max-width: 640px;
    line-height: 1.6;
    margin: 0;
}

/* Loading */
.lab-loading {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.lab-spinner {
    width: 28px;
    height: 28px;
    border: 2px solid var(--color-border-subtle);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
    animation: lab-spin 0.8s linear infinite;
}

@keyframes lab-spin {
    to { transform: rotate(360deg); }
}

/* Error */
.lab-error {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--color-text-muted);
    border: 1px dashed var(--color-border-subtle);
    border-radius: 8px;
}

.lab-error-link {
    display: inline-block;
    margin-top: var(--spacing-md);
    color: var(--color-accent);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: opacity var(--transition-fast);
}

.lab-error-link:hover {
    opacity: 0.8;
}

/* Repo Grid */
.repo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

/* Repo Card */
.repo-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border-subtle);
    border-radius: 8px;
    background: var(--color-bg-secondary);
    color: inherit;
}

/* Card Header */
.repo-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.repo-icon {
    flex-shrink: 0;
    color: var(--color-text-muted);
}

.repo-name {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 0;
    line-height: 1.3;
    word-break: break-word;
}

/* Description */
.repo-desc {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.repo-desc--empty {
    color: var(--color-text-muted);
    opacity: 0.6;
    font-style: italic;
}

/* Topics */
.repo-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--spacing-lg);
}

.repo-topic {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 12px;
    background: var(--color-bg-elevated);
    color: var(--color-text-muted);
    font-weight: 500;
    letter-spacing: 0.2px;
}

/* Languages */
.repo-langs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
    margin-bottom: var(--spacing-lg);
}

/* Meta */
.repo-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border-subtle);
}

/* Language Bar & Labels */
.repo-lang-bar {
    display: flex;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 6px;
    background: var(--color-bg-elevated);
}

.repo-lang-bar-segment {
    display: block;
    height: 100%;
    min-width: 2px;
}

.repo-lang-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 10px;
    margin-bottom: var(--spacing-sm);
    font-size: 11px;
}

.repo-lang-pct {
    opacity: 0.5;
    font-size: 10px;
}

.repo-lang {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 11px;
    color: var(--color-text-muted);
}

.repo-lang-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.repo-stat {
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

.repo-stat svg {
    opacity: 0.7;
}

.repo-license {
    font-size: 11px;
    opacity: 0.8;
}

.repo-updated {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 11px;
    opacity: 0.7;
}

.repo-updated {
    margin-left: auto;
}

/* Repo Card Actions */
.repo-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border-subtle);
}

.repo-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    font-family: var(--font-family-mono);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.repo-btn--code {
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border-subtle);
    background: transparent;
}

.repo-btn--code:hover {
    color: var(--color-text-primary);
    border-color: var(--color-border-default);
    background: var(--color-bg-elevated);
}

.repo-btn--demo {
    color: #fff;
    background: var(--color-accent);
    border: 1px solid var(--color-accent);
}

.repo-btn--demo:hover {
    filter: brightness(1.15);
    box-shadow: 0 2px 8px rgba(var(--color-accent-rgb), 0.3);
}

/* Lab Footer */
.lab-footer {
    text-align: center;
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-xl);
}

.lab-github-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-xl);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.lab-github-link svg {
    fill: currentColor;
}

.lab-github-link:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-hover);
}

@media (max-width: 600px) {
    .lab-container {
        padding-bottom: 60px;
    }

    .lab-header {
        margin-bottom: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }

    .lab-header h1 {
        font-size: 28px;
        letter-spacing: -0.5px;
    }

    .lab-header .bio {
        font-size: var(--font-size-base);
    }

    .repo-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .repo-card {
        padding: var(--spacing-md);
    }

    .repo-name {
        font-size: var(--font-size-sm);
    }

    .repo-desc {
        font-size: var(--font-size-xs);
    }

    .repo-updated {
        margin-left: 0;
        width: 100%;
        margin-top: 4px;
    }
}

@media (max-width: 400px) {
    .lab-header h1 {
        font-size: 24px;
    }

    .lab-header .bio {
        font-size: var(--font-size-sm);
    }
}

/* ==========================================================================
   About Page
   ========================================================================== */
.about-page {
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    min-height: 100vh;
    padding: 0;
    justify-content: flex-start;
    align-items: stretch;
}

.about-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-lg);
    padding-bottom: 80px;
    flex: 1;
}

.about-header {
    margin-bottom: var(--spacing-xl);
}

/* Hero Section */
.about-hero {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid var(--color-border-subtle);
}

.about-avatar img {
    width: 140px;
    height: 140px;
    border-radius: var(--border-radius-full);
    border: 3px solid var(--color-border-subtle);
    object-fit: cover;
    object-position: center 20%;
    transition: transform var(--transition-fast);
}

.about-avatar img:hover {
    transform: scale(1.05);
}

.about-intro h1 {
    color: var(--color-text-primary);
    font-size: clamp(28px, 5vw, 40px);
    font-weight: 800;
    letter-spacing: -1px;
    line-height: 1.1;
    margin-bottom: var(--spacing-xs);
}

.about-tagline {
    color: var(--color-accent);
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.3px;
}

.about-bio {
    color: var(--color-text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: var(--font-size-sm);
    line-height: 1.7;
    margin: 0;
}

/* Sections */
.about-section {
    margin-bottom: var(--spacing-3xl);
}

.about-section h2 {
    color: var(--color-text-primary);
    font-size: clamp(18px, 3vw, 22px);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border-subtle);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    letter-spacing: -0.3px;
}

.section-icon {
    font-size: 18px;
}

.about-section p {
    color: var(--color-text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.8;
}

.about-section p strong {
    color: var(--color-text-primary);
}

/* Skills */
.about-skills {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.skill-group h3 {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    font-size: var(--font-size-xs);
    padding: 5px 14px;
    border-radius: 20px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-subtle);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    letter-spacing: 0.2px;
}

.skill-tag:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-accent-hover);
}

/* Interests */
.about-interests {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.about-interests li {
    color: var(--color-text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    padding-left: var(--spacing-lg);
    position: relative;
}

.about-interests li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
    font-size: 16px;
}

/* Social Links */
.about-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.about-link-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid var(--color-border-subtle);
    border-radius: 8px;
    background: var(--color-bg-secondary);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-fast);
}

.about-link-card svg {
    flex-shrink: 0;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.about-link-card div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.about-link-card strong {
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.about-link-card span {
    color: var(--color-text-muted);
    font-size: 12px;
}

.about-link-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--color-accent-rgb), 0.1);
}

.about-link-card:hover svg {
    color: var(--color-accent);
}

.about-link-card:hover strong {
    color: var(--color-accent);
}

.about-link-card:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* About Responsive */
@media (max-width: 600px) {
    .about-container {
        padding-bottom: 60px;
        padding-bottom: 60px;
    }

    .about-hero {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }

    .about-avatar img {
        width: 110px;
        height: 110px;
    }

    .about-intro h1 {
        font-size: 26px;
    }

    .about-tagline {
        font-size: var(--font-size-sm);
    }

    .about-bio {
        font-size: var(--font-size-xs);
    }

    .about-section h2 {
        font-size: 17px;
    }

    .about-links {
        grid-template-columns: 1fr;
    }

    .about-link-card {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

@media (max-width: 400px) {
    .about-intro h1 {
        font-size: 22px;
    }

    .skill-tag {
        font-size: 11px;
        padding: 4px 10px;
    }
}

@media (max-width: 600px) {
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
    
    .scroll-to-top svg {
        width: 18px;
        height: 18px;
    }
    
    .focus-mode-btn {
        bottom: 75px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
    
    .focus-mode-btn svg {
        width: 18px;
        height: 18px;
    }
    
    .focus-mode .post-layout {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    .focus-mode .post-content {
        font-size: 17px;
    }
    
    .focus-mode .post-content h2 {
        font-size: 24px;
    }
    
    .focus-mode .post-content h3 {
        font-size: 20px;
    }
}

/* Estimated Reading Time */
.reading-time {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.reading-time::before {
    content: '⏱';
    font-size: 12px;
}

/* Author Card */
.author-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: 8px;
    margin-top: var(--spacing-2xl);
}

.author-card img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--color-accent);
}

.author-card .author-info {
    flex: 1;
}

.author-card .author-name {
    color: var(--color-text-primary);
    font-weight: 600;
    margin-bottom: 4px;
}

.author-card .author-bio {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-border-subtle);
   
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.site-footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
}

.site-footer p {
    margin: 0;
    line-height: 1.6;
}

.site-footer-quote {
    opacity: 0.7;
    font-size: 11px;
}

/* Responsive */
@media (max-width: 768px) {
    .post-layout {
        flex-direction: column;
        padding: var(--spacing-lg) var(--spacing-md);
        gap: 0;
    }
    
    .post-layout .post-container {
        max-width: 100%;
        width: 100%;
    }
    
    .post-content table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
        font-size: 13px;
    }
    
    .post-content pre {
        margin-left: calc(-1 * var(--spacing-md));
        margin-right: calc(-1 * var(--spacing-md));
        border-radius: 0;
        font-size: 13px;
    }

    .post-content .highlight {
        margin-left: calc(-1 * var(--spacing-md));
        margin-right: calc(-1 * var(--spacing-md));
        border-radius: 0;
    }
    
    .chips {
        justify-content: flex-start;
    }
    
    .callout {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .video-container {
        margin-left: calc(-1 * var(--spacing-md));
        margin-right: calc(-1 * var(--spacing-md));
        border-radius: 0;
    }
}

@media (max-width: 600px) {
    .site-header {
        padding: var(--spacing-sm) var(--spacing-md);
        gap: var(--spacing-sm);
    }

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

    .site-header .header-logo {
        font-size: 0.9rem;
    }

    .site-header .nav-link {
        font-size: 12px;
    }

    .site-footer {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
        padding: var(--spacing-xl) var(--spacing-md);
        font-size: 13px;
    }

    .blog-container,
    .lab-container,
    .about-container {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    .post-layout {
        padding: var(--spacing-md);
        padding-top: var(--spacing-lg);
    }
    
    .blog-container {
        padding-bottom: 60px;
    }
    
    .post-container {
        padding: 0;
        padding-bottom: 60px;
    }
    
    .blog-header {
        margin-bottom: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }
    
    .blog-header h1 {
        font-size: 30px;
        letter-spacing: -0.5px;
    }
    
    .blog-header .bio {
        font-size: 17px;
    }
    
    .post-header {
        margin-bottom: var(--spacing-lg);
        padding-bottom: var(--spacing-md);
    }
    
    .post-header h1 {
        font-size: 34px;
        line-height: 1.25;
    }
    
    .post-meta-line {
        font-size: 14px;
    }
    
    .post-title {
        font-size: 20px;
    }
    
    .post-card {
        border-radius: 6px;
    }
    
    .post-card:hover {
        transform: none;
    }
    
    .post-card::before {
        display: none;
    }
    
    .post-link {
        padding: 0;
    }
    
    .post-excerpt {
        font-size: 16px;
        -webkit-line-clamp: 3;
        line-clamp: 3;
    }
    
    .post-content {
        font-size: 18px;
        line-height: 1.8;
    }
    
    .post-content h2 {
        font-size: 24px;
        margin: var(--spacing-xl) 0 var(--spacing-md);
    }
    
    .post-content h3 {
        font-size: 20px;
    }
    
    .post-content p {
        margin-bottom: var(--spacing-md);
    }
    
    .post-content pre {
        padding: var(--spacing-md);
        padding-top: var(--spacing-xl);
        font-size: 14px;
    }
    
    .post-content code {
        font-size: 15px;
        padding: 2px 6px;
    }
    
    .post-content blockquote {
        padding: var(--spacing-sm) var(--spacing-md);
        margin: var(--spacing-md) 0;
        font-size: 17px;
    }
    
    .post-content blockquote::before {
        display: none;
    }
    
    .post-content ul,
    .post-content ol {
        padding-left: var(--spacing-lg);
    }
    
    .post-content img {
        margin: var(--spacing-md) 0;
        border-radius: 4px;
    }
    
    .post-footer {
        flex-direction: column;
        gap: var(--spacing-md);
        margin-top: var(--spacing-xl);
        padding-top: var(--spacing-md);
    }
    
    .tag {
        font-size: 11px;
        padding: 2px 8px;
    }
    
    .post-tags {
        gap: 4px;
    }
    
    .toc-mobile {
        margin-bottom: var(--spacing-lg);
        border-radius: 6px;
    }
    
    .toc-toggle {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 14px;
    }
    
    .toc-content a {
        font-size: 13px;
        padding: 6px var(--spacing-sm);
    }
    
    .back-link {
        font-size: 14px;
        padding: 4px 10px;
    }
    
    .scroll-to-top {
        bottom: 16px;
        right: 16px;
        width: 40px;
        height: 40px;
    }
    
    .scroll-to-top svg {
        width: 16px;
        height: 16px;
    }
    
    /* Details/Accordion mobile */
    .post-content details {
        border-radius: 6px;
    }
    
    .post-content summary {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 15px;
    }
    
    .post-content details > *:not(summary) {
        padding: 0 var(--spacing-md) var(--spacing-md);
    }
    
    /* Callouts mobile */
    .callout {
        font-size: 15px;
        border-radius: 6px;
    }
    
    /* Chips mobile */
    .chip {
        font-size: 11px;
        padding: 4px 10px;
    }
    
    /* Tables mobile */
    .post-content th,
    .post-content td {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 13px;
    }
    
    /* Comments mobile */
    .comments-section {
        margin-top: var(--spacing-xl);
        padding-top: var(--spacing-xl);
    }
    
    .comments-title {
        font-size: 18px;
        margin-bottom: var(--spacing-md);
    }
    
    #disqus_thread {
        padding: var(--spacing-md);
        margin-left: calc(-1 * var(--spacing-sm));
        margin-right: calc(-1 * var(--spacing-sm));
        border-radius: 6px;
    }
}

@media (max-width: 400px) {
    .post-layout {
        padding: var(--spacing-sm);
        padding-top: var(--spacing-md);
    }
    
    .post-container {
        padding: 0;
    }
    
    .post-header h1 {
        font-size: 28px;
    }
    
    .post-content {
        font-size: 16px;
    }
    
    .post-content h2 {
        font-size: 20px;
        padding-left: 0;
    }
    
    .blog-header h1 {
        font-size: 24px;
    }
    
    .blog-header .bio {
        font-size: var(--font-size-base);
    }
}

/* ==========================================================================
   Syntax Highlighting (Chroma) — Light theme (github)
   ========================================================================== */
.bg { background-color: #fff; }
.chroma { background-color: #fff; color: #24292e; }
.chroma .err { color: #a61717; background-color: #e3d2d2; }
.chroma .lnlinks { outline: none; text-decoration: none; color: inherit; }
.chroma .lntd { vertical-align: top; padding: 0; margin: 0; border: 0; }
.chroma .lntable { border-spacing: 0; padding: 0; margin: 0; border: 0; }
.chroma .hl { background-color: #e5e5e5; }
.chroma .lnt { white-space: pre; -webkit-user-select: none; user-select: none; margin-right: 0.4em; padding: 0 0.4em; color: #7f7f7f; }
.chroma .ln { white-space: pre; -webkit-user-select: none; user-select: none; margin-right: 0.4em; padding: 0 0.4em; color: #7f7f7f; }
.chroma .line { display: flex; }
.chroma .k { color: #000; font-weight: bold; }
.chroma .kc { color: #000; font-weight: bold; }
.chroma .kd { color: #000; font-weight: bold; }
.chroma .kn { color: #000; font-weight: bold; }
.chroma .kp { color: #000; font-weight: bold; }
.chroma .kr { color: #000; font-weight: bold; }
.chroma .kt { color: #458; font-weight: bold; }
.chroma .na { color: #008080; }
.chroma .nb { color: #0086b3; }
.chroma .bp { color: #999; }
.chroma .nc { color: #458; font-weight: bold; }
.chroma .no { color: #008080; }
.chroma .nd { color: #3c5d5d; font-weight: bold; }
.chroma .ni { color: #800080; }
.chroma .ne { color: #900; font-weight: bold; }
.chroma .nf { color: #900; font-weight: bold; }
.chroma .nl { color: #900; font-weight: bold; }
.chroma .nn { color: #555; }
.chroma .nt { color: #000080; }
.chroma .nv { color: #008080; }
.chroma .vc { color: #008080; }
.chroma .vg { color: #008080; }
.chroma .vi { color: #008080; }
.chroma .s { color: #d14; }
.chroma .sa { color: #d14; }
.chroma .sb { color: #d14; }
.chroma .sc { color: #d14; }
.chroma .dl { color: #d14; }
.chroma .sd { color: #d14; }
.chroma .s2 { color: #d14; }
.chroma .se { color: #d14; }
.chroma .sh { color: #d14; }
.chroma .si { color: #d14; }
.chroma .sx { color: #d14; }
.chroma .sr { color: #009926; }
.chroma .s1 { color: #d14; }
.chroma .ss { color: #990073; }
.chroma .m { color: #099; }
.chroma .mb { color: #099; }
.chroma .mf { color: #099; }
.chroma .mh { color: #099; }
.chroma .mi { color: #099; }
.chroma .il { color: #099; }
.chroma .mo { color: #099; }
.chroma .o { color: #000; font-weight: bold; }
.chroma .ow { color: #000; font-weight: bold; }
.chroma .c { color: #998; font-style: italic; }
.chroma .ch { color: #998; font-style: italic; }
.chroma .cm { color: #998; font-style: italic; }
.chroma .c1 { color: #998; font-style: italic; }
.chroma .cs { color: #999; font-weight: bold; font-style: italic; }
.chroma .cp { color: #999; font-weight: bold; font-style: italic; }
.chroma .cpf { color: #999; font-weight: bold; font-style: italic; }
.chroma .gd { color: #000; background-color: #fdd; }
.chroma .ge { color: #000; font-style: italic; }
.chroma .gr { color: #a00; }
.chroma .gh { color: #999; }
.chroma .gi { color: #000; background-color: #dfd; }
.chroma .go { color: #888; }
.chroma .gp { color: #555; }
.chroma .gs { font-weight: bold; }
.chroma .gu { color: #aaa; }
.chroma .gt { color: #a00; }
.chroma .gl { text-decoration: underline; }
.chroma .w { color: #bbb; }

/* ==========================================================================
   Syntax Highlighting (Chroma) — Dark theme (monokai)
   ========================================================================== */
[data-theme="dark"] .bg { background-color: #272822; }
[data-theme="dark"] .chroma { background-color: #272822; color: #f8f8f2; }
[data-theme="dark"] .chroma .err { color: #960050; background-color: #1e0010; }
[data-theme="dark"] .chroma .hl { background-color: #3c3d38; }
[data-theme="dark"] .chroma .k { color: #66d9ef; }
[data-theme="dark"] .chroma .kc { color: #66d9ef; }
[data-theme="dark"] .chroma .kd { color: #66d9ef; }
[data-theme="dark"] .chroma .kn { color: #f92672; }
[data-theme="dark"] .chroma .kp { color: #66d9ef; }
[data-theme="dark"] .chroma .kr { color: #66d9ef; }
[data-theme="dark"] .chroma .kt { color: #66d9ef; }
[data-theme="dark"] .chroma .na { color: #a6e22e; }
[data-theme="dark"] .chroma .nc { color: #a6e22e; }
[data-theme="dark"] .chroma .no { color: #66d9ef; }
[data-theme="dark"] .chroma .nd { color: #a6e22e; }
[data-theme="dark"] .chroma .ne { color: #a6e22e; }
[data-theme="dark"] .chroma .nf { color: #a6e22e; }
[data-theme="dark"] .chroma .nx { color: #a6e22e; }
[data-theme="dark"] .chroma .nt { color: #f92672; }
[data-theme="dark"] .chroma .l { color: #ae81ff; }
[data-theme="dark"] .chroma .ld { color: #e6db74; }
[data-theme="dark"] .chroma .s { color: #e6db74; }
[data-theme="dark"] .chroma .sa { color: #e6db74; }
[data-theme="dark"] .chroma .sb { color: #e6db74; }
[data-theme="dark"] .chroma .sc { color: #e6db74; }
[data-theme="dark"] .chroma .dl { color: #e6db74; }
[data-theme="dark"] .chroma .sd { color: #e6db74; }
[data-theme="dark"] .chroma .s2 { color: #e6db74; }
[data-theme="dark"] .chroma .se { color: #ae81ff; }
[data-theme="dark"] .chroma .sh { color: #e6db74; }
[data-theme="dark"] .chroma .si { color: #e6db74; }
[data-theme="dark"] .chroma .sx { color: #e6db74; }
[data-theme="dark"] .chroma .sr { color: #e6db74; }
[data-theme="dark"] .chroma .s1 { color: #e6db74; }
[data-theme="dark"] .chroma .ss { color: #e6db74; }
[data-theme="dark"] .chroma .m { color: #ae81ff; }
[data-theme="dark"] .chroma .mb { color: #ae81ff; }
[data-theme="dark"] .chroma .mf { color: #ae81ff; }
[data-theme="dark"] .chroma .mh { color: #ae81ff; }
[data-theme="dark"] .chroma .mi { color: #ae81ff; }
[data-theme="dark"] .chroma .il { color: #ae81ff; }
[data-theme="dark"] .chroma .mo { color: #ae81ff; }
[data-theme="dark"] .chroma .o { color: #f92672; }
[data-theme="dark"] .chroma .ow { color: #f92672; }
[data-theme="dark"] .chroma .c { color: #75715e; }
[data-theme="dark"] .chroma .ch { color: #75715e; }
[data-theme="dark"] .chroma .cm { color: #75715e; }
[data-theme="dark"] .chroma .c1 { color: #75715e; }
[data-theme="dark"] .chroma .cs { color: #75715e; }
[data-theme="dark"] .chroma .cp { color: #75715e; }
[data-theme="dark"] .chroma .cpf { color: #75715e; }
[data-theme="dark"] .chroma .gd { color: #f92672; }
[data-theme="dark"] .chroma .ge { font-style: italic; }
[data-theme="dark"] .chroma .gi { color: #a6e22e; }
[data-theme="dark"] .chroma .gs { font-weight: bold; }
[data-theme="dark"] .chroma .gu { color: #75715e; }