/* ==========================================
   Andrew's Portfolio - Engineering Aesthetic
   ========================================== */

/* CSS Custom Properties */
:root {
    /* Colors - Dark theme with blue accent */
    --color-bg: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-card: #161616;
    --color-bg-card-hover: #1a1a1a;

    --color-text: #f5f5f5;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #666666;

    --color-accent: #3b82f6;
    --color-accent-hover: #5b9aff;
    --color-accent-muted: rgba(59, 130, 246, 0.15);

    --color-border: #222222;
    --color-border-light: #2a2a2a;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 72px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    color: var(--color-text-secondary);
}

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

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

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

/* Utility Classes */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1rem;
}

.text-muted {
    color: var(--color-text-muted);
}

.text-secondary {
    color: var(--color-text-secondary);
}

.text-accent {
    color: var(--color-accent);
}

/* ==========================================
   Navigation
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: background var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav-logo:hover {
    color: var(--color-text);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-links a {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-base);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--color-bg-secondary);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 0%, var(--color-accent-muted) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-label {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: white;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--color-bg-card);
    color: var(--color-text);
    border-color: var(--color-text-muted);
}

/* ==========================================
   About Section
   ========================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-text p {
    margin-bottom: var(--spacing-sm);
    font-size: 1.05rem;
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.about-image::after {
    content: '';
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    right: calc(var(--spacing-sm) * -1);
    bottom: calc(var(--spacing-sm) * -1);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-lg);
    z-index: -1;
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .about-image {
        order: -1;
        max-width: 300px;
    }
}

/* ==========================================
   Skills Section
   ========================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.skill-category h3 {
    font-size: 1rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

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

.skill-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

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

/* ==========================================
   Projects Section
   ========================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-light);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-image {
    aspect-ratio: 16/10;
    background: var(--color-bg-secondary);
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    padding: var(--spacing-md);
}

.project-category {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.project-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.project-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.project-link svg {
    transition: transform var(--transition-fast);
}

.project-link:hover svg {
    transform: translateX(4px);
}

/* Project placeholder */
.project-card.placeholder {
    border-style: dashed;
    opacity: 0.6;
}

.project-card.placeholder .project-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-card.placeholder:hover {
    transform: none;
    box-shadow: none;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-content h2 {
    margin-bottom: var(--spacing-sm);
}

.contact-content p {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.contact-link:hover {
    color: var(--color-text);
    border-color: var(--color-accent);
    background: var(--color-accent-muted);
}

.contact-link svg {
    width: 20px;
    height: 20px;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ==========================================
   Page Headers
   ========================================== */
.page-header {
    padding: calc(var(--nav-height) + var(--spacing-lg)) 0 var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.page-header p {
    font-size: 1.1rem;
    max-width: 600px;
}

/* ==========================================
   Projects Page
   ========================================== */
.projects-category {
    margin-bottom: var(--spacing-lg);
}

.projects-category h2 {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
}

/* ==========================================
   Blog Page
   ========================================== */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.blog-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.blog-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-light);
}

.blog-image {
    aspect-ratio: 16/9;
    background: var(--color-bg-secondary);
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.blog-content {
    padding: var(--spacing-md);
}

.blog-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.blog-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.blog-excerpt {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.blog-link {
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* ==========================================
   Project Detail Page
   ========================================== */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    transition: color var(--transition-fast);
}

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

.project-header {
    padding: calc(var(--nav-height) + var(--spacing-lg)) 0 var(--spacing-md);
}

.project-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.project-header .subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.meta-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.meta-value {
    font-size: 0.95rem;
    color: var(--color-text);
}

/* Altium Viewer */
.altium-section {
    background: var(--color-bg-secondary);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.altium-viewer-container {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 600px;
}

.altium-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 600px;
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--color-text-muted);
}

.altium-placeholder svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

.altium-placeholder p {
    max-width: 400px;
}

/* View Tabs */
.view-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.view-tab {
    padding: 0.5rem 1rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.view-tab:hover,
.view-tab.active {
    background: var(--color-accent-muted);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Project Content */
.project-body {
    padding: var(--spacing-lg) 0;
}

.project-section {
    margin-bottom: var(--spacing-lg);
}

.project-section:last-child {
    margin-bottom: 0;
}

.project-section h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.project-section h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.project-section p {
    margin-bottom: var(--spacing-sm);
}

.project-section ul {
    list-style: none;
    margin-bottom: var(--spacing-sm);
}

.project-section ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
}

.project-section ul li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-family: var(--font-mono);
}

/* Specs Table */
.specs-table {
    width: 100%;
    border-collapse: collapse;
}

.specs-table tr {
    border-bottom: 1px solid var(--color-border);
}

.specs-table th,
.specs-table td {
    padding: 1rem;
    text-align: left;
}

.specs-table th {
    width: 200px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.specs-table td {
    color: var(--color-text);
}

/* Project Gallery */
.project-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-sm);
}

.gallery-item {
    aspect-ratio: 4/3;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

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

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Project Navigation */
.project-nav {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-lg);
}

.project-nav a {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.project-nav .label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.project-nav .title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
}

.project-nav .next {
    text-align: right;
}

/* ==========================================
   Blog Post Page
   ========================================== */
.article-header {
    padding: calc(var(--nav-height) + var(--spacing-lg)) 0 var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.article-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.article-hero {
    max-width: 1000px;
    margin: 0 auto var(--spacing-lg);
}

.article-hero img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    padding-bottom: var(--spacing-lg);
}

.article-content h2 {
    font-size: 1.75rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.article-content h3 {
    font-size: 1.375rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.article-content p {
    margin-bottom: var(--spacing-sm);
    font-size: 1.05rem;
    line-height: 1.75;
}

.article-content ul,
.article-content ol {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
}

.article-content li {
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
}

.article-content blockquote {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm) var(--spacing-md);
    border-left: 3px solid var(--color-accent);
    background: var(--color-bg-secondary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.article-content blockquote p {
    font-style: italic;
    margin-bottom: 0;
}

.article-content img {
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
}

.article-content figure {
    margin: var(--spacing-md) 0;
}

.article-content figcaption {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.article-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-bg-secondary);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
}

.article-content pre {
    background: var(--color-bg-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--spacing-md) 0;
}

.article-content pre code {
    background: none;
    padding: 0;
}

/* Article Tags */
.article-tags {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.article-tag {
    padding: 0.5rem 1rem;
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Post Navigation */
.post-nav {
    display: flex;
    justify-content: space-between;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-lg);
    gap: var(--spacing-md);
}

.post-nav a {
    flex: 1;
    padding: var(--spacing-sm);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.post-nav .label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.25rem;
}

.post-nav .title {
    font-size: 1rem;
    color: var(--color-text);
}

.post-nav .next {
    text-align: right;
}

/* ==========================================
   Lightbox
   ========================================== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: var(--radius-md);
}

.lightbox-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 2rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
}

/* ==========================================
   Animations
   ========================================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ==========================================
   Responsive Adjustments
   ========================================== */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }

    .hero {
        min-height: auto;
        padding-top: calc(var(--nav-height) + var(--spacing-lg));
        padding-bottom: var(--spacing-lg);
    }

    .hero-cta {
        flex-direction: column;
    }

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

    .projects-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }

    .contact-links {
        flex-direction: column;
    }

    .project-meta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .specs-table th {
        width: 120px;
    }

    .post-nav {
        flex-direction: column;
    }
}

/* ==========================================
   Travel Page - Map Section
   ========================================== */
.travel-map-section {
    padding: var(--spacing-lg) 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.travel-map {
    height: 450px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
    overflow: hidden;
}

/* Leaflet dark theme overrides */
.travel-map .leaflet-control-zoom a {
    background: var(--color-bg-card);
    color: var(--color-text);
    border-color: var(--color-border);
}

.travel-map .leaflet-control-zoom a:hover {
    background: var(--color-bg-card-hover);
    color: var(--color-accent);
}

.travel-map .leaflet-control-attribution {
    background: rgba(10, 10, 10, 0.8);
    color: var(--color-text-muted);
    font-size: 0.7rem;
}

.travel-map .leaflet-control-attribution a {
    color: var(--color-accent);
}

/* Custom map marker */
.travel-marker {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-accent);
    border: 3px solid var(--color-bg);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.travel-marker:hover {
    transform: scale(1.15);
    background: var(--color-accent-hover);
}

.travel-marker svg {
    width: 14px;
    height: 14px;
    stroke: white;
}

/* Map popup styling */
.leaflet-popup-content-wrapper {
    background: var(--color-bg-card);
    color: var(--color-text);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.leaflet-popup-content {
    margin: 12px 16px;
}

.leaflet-popup-tip {
    background: var(--color-bg-card);
}

.map-popup {
    text-align: center;
    min-width: 120px;
}

.map-popup-title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 4px;
    color: var(--color-text);
}

.map-popup-date {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.map-popup-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

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

/* ==========================================
   Travel Page - Trip Sections
   ========================================== */
.trip-section {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
    scroll-margin-top: calc(var(--nav-height) + var(--spacing-md));
}

.trip-section:last-child {
    border-bottom: none;
}

.trip-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.trip-info {
    flex: 1;
}

.trip-location {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.trip-location svg {
    flex-shrink: 0;
}

.trip-title {
    font-size: 1.75rem;
    color: var(--color-text);
    margin: 0;
}

.trip-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    text-align: right;
}

.trip-date {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

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

.trip-description {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 800px;
    margin-bottom: var(--spacing-md);
}

/* ==========================================
   Travel Page - Masonry Gallery
   ========================================== */
.trip-gallery {
    column-count: 3;
    column-gap: var(--spacing-sm);
}

.trip-gallery .gallery-item {
    break-inside: avoid;
    margin-bottom: var(--spacing-sm);
    aspect-ratio: auto;
}

.trip-gallery .gallery-item img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* ==========================================
   Travel Page - Responsive
   ========================================== */
@media (max-width: 1024px) {
    .trip-gallery {
        column-count: 2;
    }
}

@media (max-width: 768px) {
    .travel-map {
        height: 350px;
        border-radius: var(--radius-md);
    }

    .trip-header {
        flex-direction: column;
    }

    .trip-meta {
        flex-direction: row;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .trip-title {
        font-size: 1.5rem;
    }

    .trip-section {
        padding: var(--spacing-md) 0;
    }
}

@media (max-width: 480px) {
    .travel-map {
        height: 280px;
    }

    .trip-gallery {
        column-count: 1;
    }
}