/* ==========================================================================
   SAM NART — Design System
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables & Theming
   -------------------------------------------------------------------------- */
:root {
    /* Dark theme (default) */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --text-muted: #5a5a5a;
    --accent: #ff6b35;
    --accent-hover: #ff8555;
    --accent-glow: rgba(255, 107, 53, 0.15);
    --border: #222222;
    --border-light: #2a2a2a;
    
    /* Typography */
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    --font-serif: 'Newsreader', 'Georgia', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    
    /* Sizing */
    --max-width: 1200px;
    --content-width: 720px;
    --nav-height: 60px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-medium: 0.25s ease;
    --transition-slow: 0.4s ease;
    --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --------------------------------------------------------------------------
   Page Transitions & Load Animations
   -------------------------------------------------------------------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Page load animation */
.page {
    animation: fadeIn 0.5s ease-out;
}

/* Staggered content animations */
.animate-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays for children */
.stagger-children > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children > *:nth-child(2) { transition-delay: 50ms; }
.stagger-children > *:nth-child(3) { transition-delay: 100ms; }
.stagger-children > *:nth-child(4) { transition-delay: 150ms; }
.stagger-children > *:nth-child(5) { transition-delay: 200ms; }
.stagger-children > *:nth-child(6) { transition-delay: 250ms; }
.stagger-children > *:nth-child(7) { transition-delay: 300ms; }
.stagger-children > *:nth-child(8) { transition-delay: 350ms; }
.stagger-children > *:nth-child(9) { transition-delay: 400ms; }
.stagger-children > *:nth-child(10) { transition-delay: 450ms; }
.stagger-children > *:nth-child(n+11) { transition-delay: 500ms; }

[data-theme="light"] {
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f0f0f0;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #888888;
    --border: #e0e0e0;
    --border-light: #eaeaea;
    --accent-glow: rgba(255, 107, 53, 0.1);
}

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

html {
    font-size: 17px;
    scroll-behavior: smooth;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-serif);
    line-height: 1.65;
    min-height: 100vh;
    transition: background var(--transition-medium), color var(--transition-medium);
}

::selection {
    background: var(--accent);
    color: var(--bg-primary);
}

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

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

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container--narrow {
    max-width: var(--content-width);
}

.page {
    min-height: calc(100vh - var(--nav-height));
    padding: var(--space-xl) 0 var(--space-2xl);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    height: var(--nav-height);
    transition: background var(--transition-medium);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav__logo {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.nav__logo span {
    color: var(--accent);
}

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

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    list-style: none;
}

.nav__link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::before {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition-medium);
}

.nav__link:hover {
    color: var(--text-primary);
}

.nav__link:hover::before {
    width: 100%;
}

.nav__link.active {
    color: var(--text-primary);
}

.nav__link.active::before {
    width: 100%;
}

.nav__toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: var(--space-xs) var(--space-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.nav__toggle:hover {
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.nav__toggle svg {
    width: 18px;
    height: 18px;
}

/* Mobile nav */
.nav__mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    color: var(--text-primary);
}

.nav__mobile-toggle svg {
    width: 24px;
    height: 24px;
}

@media (max-width: 768px) {
    .nav__links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-medium);
    }
    
    .nav__links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .nav__mobile-toggle {
        display: flex;
    }
    
    .nav__toggle {
        position: absolute;
        right: var(--space-lg);
        top: calc(var(--nav-height) + var(--space-lg));
    }
    
    .nav__links.open .nav__toggle {
        position: static;
        margin-top: var(--space-md);
    }
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
.page-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--space-xl);
}

.section-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 500;
    margin-bottom: var(--space-lg);
}

.lead {
    font-size: 1.35rem;
    line-height: 1.5;
    color: var(--text-primary);
}

.prose {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--text-secondary);
}

.prose p + p {
    margin-top: var(--space-md);
}

.prose a {
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-underline-offset: 3px;
    transition: color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   Home Page
   -------------------------------------------------------------------------- */
.hero {
    padding: var(--space-2xl) 0;
}

.hero__intro {
    margin-bottom: var(--space-xl);
}

.hero__name {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--accent);
    margin-bottom: var(--space-md);
}

.hero__bio {
    max-width: 600px;
}

.hero__status {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.hero__status::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* Featured sections on home */
.featured {
    margin-top: var(--space-2xl);
}

.featured__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.featured__title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.featured__link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   Projects
   -------------------------------------------------------------------------- */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.filter-btn {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.filter-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-medium);
    z-index: 0;
}

.filter-btn span,
.filter-btn {
    position: relative;
    z-index: 1;
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-primary);
}

.filter-btn.active::before {
    transform: scaleX(1);
}

.projects-grid {
    display: grid;
    gap: var(--space-md);
}

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--space-lg);
    transition: all var(--transition-medium);
    display: block;
    position: relative;
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 8px;
    background: var(--accent-glow);
    opacity: 0;
    transition: opacity var(--transition-medium);
    pointer-events: none;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.3);
}

.project-card:hover::before {
    opacity: 1;
}

.project-card[data-hidden="true"] {
    display: none;
}

.project-card__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.project-card__name {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.project-card__lang {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: 4px;
    color: var(--text-muted);
    white-space: nowrap;
}

.project-card__desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.project-card__links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border);
}

.project-card__link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    transition: color var(--transition-fast);
}

.project-card__link:hover {
    color: var(--accent);
}

.project-card__link svg {
    width: 14px;
    height: 14px;
}

/* --------------------------------------------------------------------------
   Writing / Blog
   -------------------------------------------------------------------------- */
.posts-list {
    display: flex;
    flex-direction: column;
}

.post-item {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--border);
    transition: all var(--transition-medium);
    position: relative;
}

.post-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--accent);
    border-radius: 2px;
    transition: height var(--transition-medium);
}

.post-item:first-child {
    border-top: 1px solid var(--border);
}

.post-item:hover {
    padding-left: var(--space-md);
}

.post-item:hover::before {
    height: 60%;
}

.post-item__title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

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

.post-item__meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

@media (max-width: 600px) {
    .post-item {
        flex-direction: column;
        gap: var(--space-xs);
    }
}

/* --------------------------------------------------------------------------
   Photography
   -------------------------------------------------------------------------- */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-sm);
}

.photo-item {
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: 4px;
    cursor: pointer;
    position: relative;
}

.photo-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow), filter var(--transition-slow);
}

.photo-item:hover img {
    transform: scale(1.08);
    filter: brightness(0.85);
}

.photo-item__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 50%, rgba(0,0,0,0.8));
    opacity: 0;
    transition: opacity var(--transition-medium);
    display: flex;
    align-items: flex-end;
    padding: var(--space-md);
}

.photo-item:hover .photo-item__overlay {
    opacity: 1;
}

.photo-item__caption {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: #fff;
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.95);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-medium);
}

.lightbox.open {
    opacity: 1;
    pointer-events: auto;
}

.lightbox__img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
}

.lightbox__close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: var(--space-sm);
}

.lightbox__close svg {
    width: 32px;
    height: 32px;
}

.lightbox__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: var(--space-md);
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.lightbox__nav:hover {
    opacity: 1;
}

.lightbox__nav--prev {
    left: var(--space-lg);
}

.lightbox__nav--next {
    right: var(--space-lg);
}

.lightbox__nav svg {
    width: 40px;
    height: 40px;
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
}

@media (min-width: 900px) {
    .about-content {
        grid-template-columns: 2fr 1fr;
    }
}

.about__photo {
    width: 100%;
    max-width: 300px;
    border-radius: 8px;
    margin-bottom: var(--space-lg);
}

.about__section {
    margin-bottom: var(--space-xl);
}

.about__section-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.contact-link {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

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

.contact-link svg {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    transition: color var(--transition-fast), transform var(--transition-bounce);
}

.contact-link:hover svg {
    color: var(--accent);
    transform: scale(1.1);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    border-top: 1px solid var(--border);
    padding: var(--space-xl) 0;
    margin-top: var(--space-2xl);
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer__text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.footer__links {
    display: flex;
    gap: var(--space-md);
}

.footer__link {
    color: var(--text-muted);
    transition: color var(--transition-fast), transform var(--transition-bounce);
    display: inline-block;
}

.footer__link:hover {
    color: var(--accent);
    transform: translateY(-2px);
}

.footer__link svg {
    width: 20px;
    height: 20px;
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Page transition states */
body {
    opacity: 1;
    transition: opacity 0.15s ease;
}

body.page-leaving {
    opacity: 0;
}

/* Subtle background texture/gradient (optional) */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse at top, var(--bg-secondary) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
    opacity: 0.5;
}

/* --------------------------------------------------------------------------
   Project Detail Page
   -------------------------------------------------------------------------- */
.project-detail {
    max-width: var(--content-width);
    margin: 0 auto;
}

.project-detail__header {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--border);
}

.project-detail__breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

.project-detail__breadcrumb a {
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.project-detail__breadcrumb a:hover {
    color: var(--accent);
}

.project-detail__breadcrumb svg {
    width: 12px;
    height: 12px;
}

.project-detail__top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.project-detail__title-group {
    flex: 1;
    min-width: 200px;
}

.project-detail__title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    line-height: 1.2;
}

.project-detail__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.project-detail__lang {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--accent);
    color: var(--bg-primary);
    border-radius: 4px;
    font-weight: 500;
}

.project-detail__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.project-detail__tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-tertiary);
    color: var(--text-muted);
    border-radius: 4px;
}

.project-detail__github {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    transition: all var(--transition-medium);
    text-decoration: none;
    white-space: nowrap;
}

.project-detail__github:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255, 107, 53, 0.3);
}

.project-detail__github svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-bounce);
}

.project-detail__github:hover svg {
    transform: scale(1.1);
}

.project-detail__intro {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-top: var(--space-lg);
}

/* Article Content Sections */
.project-detail__content {
    margin-top: var(--space-xl);
}

.project-detail__section {
    margin-bottom: var(--space-xl);
}

.project-detail__section-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.project-detail__section-title::before {
    content: '';
    width: 20px;
    height: 2px;
    background: var(--accent);
}

.project-detail__text {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--text-secondary);
}

.project-detail__text p + p {
    margin-top: var(--space-md);
}

.project-detail__text strong {
    color: var(--text-primary);
    font-weight: 500;
}

.project-detail__text a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.project-detail__text a:hover {
    color: var(--accent-hover);
}

/* Feature List */
.project-detail__features {
    display: grid;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.project-detail__feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all var(--transition-medium);
}

.project-detail__feature:hover {
    border-color: var(--accent);
    transform: translateX(4px);
}

.project-detail__feature-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: 8px;
    color: var(--accent);
    flex-shrink: 0;
}

.project-detail__feature-icon svg {
    width: 20px;
    height: 20px;
}

.project-detail__feature-content h4 {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.project-detail__feature-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Tech Stack */
.project-detail__stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.project-detail__stack-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.project-detail__stack-item:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.project-detail__stack-item svg {
    width: 16px;
    height: 16px;
}

/* Code Blocks */
.project-detail__code {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--space-lg);
    margin: var(--space-md) 0;
    overflow-x: auto;
}

.project-detail__code pre {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin: 0;
}

.project-detail__code code {
    font-family: inherit;
}

/* Callout/Highlight Box */
.project-detail__callout {
    background: var(--accent-glow);
    border-left: 3px solid var(--accent);
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-lg) 0;
    border-radius: 0 8px 8px 0;
}

.project-detail__callout p {
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.6;
}

/* Footer Navigation */
.project-detail__footer {
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
}

.project-detail__nav {
    display: flex;
    justify-content: space-between;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.project-detail__nav-link {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all var(--transition-medium);
    min-width: 200px;
    max-width: 45%;
}

.project-detail__nav-link:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.project-detail__nav-link span:first-child {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.project-detail__nav-link span:last-child {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--text-primary);
}

.project-detail__nav-link--next {
    text-align: right;
    margin-left: auto;
}

@media (max-width: 600px) {
    .project-detail__title {
        font-size: 1.75rem;
    }

    .project-detail__top {
        flex-direction: column;
    }

    .project-detail__github {
        width: 100%;
        justify-content: center;
    }

    .project-detail__nav-link {
        max-width: 100%;
        width: 100%;
    }
}

/* Print styles */
@media print {
    .nav, .footer, .lightbox {
        display: none;
    }

    body {
        background: #fff;
        color: #000;
    }

    .project-card {
        break-inside: avoid;
        border: 1px solid #ccc;
    }
}

/* --------------------------------------------------------------------------
   Article Page
   -------------------------------------------------------------------------- */
.article {
    max-width: var(--content-width);
}

.article__header {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border);
}

.article__title {
    font-family: var(--font-serif);
    font-size: 2.25rem;
    font-weight: 500;
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.article__meta {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.article__date {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.article__reading-time {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.article__reading-time::before {
    content: '·';
    margin-right: var(--space-xs);
}

.article__content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.article__content p {
    margin-bottom: var(--space-lg);
}

.article__content h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
}

.article__content h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-md);
}

.article__content a {
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-underline-offset: 3px;
    transition: color var(--transition-fast);
}

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

.article__content ul,
.article__content ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-lg);
}

.article__content li {
    margin-bottom: var(--space-sm);
}

.article__content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: var(--space-lg);
    margin: var(--space-lg) 0;
    font-style: italic;
    color: var(--text-muted);
}

.article__content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--bg-tertiary);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    color: var(--accent);
}

.article__content pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--space-lg);
    overflow-x: auto;
    margin: var(--space-lg) 0;
}

.article__content pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.85rem;
    line-height: 1.6;
}

.article__content strong {
    color: var(--text-primary);
    font-weight: 500;
}

.article__content em {
    font-style: italic;
}

.article__content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: var(--space-xl) 0;
}

.article__content img {
    border-radius: 8px;
    margin: var(--space-lg) 0;
}

.article__content .note {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: 4px;
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-lg) 0;
}

.article__content .note p:last-child {
    margin-bottom: 0;
}

.article__footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
}

.article__back {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    transition: color var(--transition-fast);
}

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

.article__back svg {
    width: 16px;
    height: 16px;
}

@media (max-width: 600px) {
    .article__title {
        font-size: 1.75rem;
    }

    .article__content {
        font-size: 1rem;
    }

    .article__content h2 {
        font-size: 1.35rem;
    }

    .article__content h3 {
        font-size: 1.15rem;
    }
}