:root {
    /* Greyscale + Grey Accent Palette */
    --bg-main: #F0F0F0;
    --bg-card: #FFFFFF;
    --text-primary: #1A1A1A;
    --text-secondary: #9A9A9A;
    --accent-grey: #808080;
    --border-color: #DCDCDC;
    --status-red: #D64545;
    
    --font-mono: 'Fira Code', 'SF Mono', 'Courier New', monospace;
    --font-sans: 'Inter', sans-serif;
    
    --transition: all 0.2s ease-in-out;
    --grid-gap: 24px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-main);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography & System Labels */
h1, h2, h3, h4, .system-label {
    font-family: var(--font-mono);
    font-weight: 500;
}

.system-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    display: inline-block;
    margin-bottom: 8px;
}

.section-label {
    font-size: 1rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    margin-bottom: 40px;
    text-transform: uppercase;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-main);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    padding: 4px 8px;
    border: 1px solid transparent;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-decoration: none;
    color: var(--text-secondary);
    text-transform: uppercase;
    transition: var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    font-family: var(--font-mono);
}

.mobile-menu-btn:hover {
    border-color: var(--accent-grey);
    color: var(--accent-grey);
}

/* Layout Blocks */
.panel {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 32px;
}

.panel-sm {
    padding: 24px;
}

/* Reusable Components */
.btn {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-transform: uppercase;
    padding: 12px 24px;
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
}

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

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent-grey);
}

.stat-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    line-height: 1;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* Sections */
section {
    padding: 80px 0;
}

/* Hero Section */
#hero {
    padding-top: 160px;
    padding-bottom: 60px;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--grid-gap);
    margin-bottom: var(--grid-gap);
}

.hero-main {
    border: 1px solid var(--border-color);
    padding: 48px;
    background-color: var(--bg-card);
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-stats {
    display: grid;
    grid-template-rows: repeat(2, 1fr);
    gap: var(--grid-gap);
}

.hero-stat-panel {
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    padding: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.hero-actions .btn {
    width: 100%;
}

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

.about-text-panel {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.about-text-panel p {
    font-size: 1.05rem;
    color: var(--text-primary);
}

.philosophy-box {
    margin-top: 24px;
    border-left: 2px solid var(--accent-grey);
    padding-left: 24px;
}

.philosophy-box .system-label {
    color: var(--accent-grey);
}

.skills-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-content: flex-start;
}

.skill-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    background-color: transparent;
    transition: var(--transition);
}

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

/* Experience Section */
.timeline-stack {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.timeline-card {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 32px;
    padding: 24px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    transition: var(--transition);
}

.timeline-card:hover {
    border-color: var(--text-secondary);
}

.timeline-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.timeline-role {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
}

.timeline-company {
    color: var(--accent-grey);
    font-size: 0.9rem;
}

/* Projects & Blog Sections */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.card {
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-color);
    box-shadow: 0 12px 32px rgba(0,0,0,0.06);
    transform: translateY(-4px);
}

.card-indicator {
    font-size: 0.95rem;
    font-family: var(--font-sans);
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.card:hover .card-indicator {
    transform: translateX(4px);
}

.card-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-family: var(--font-mono);
    font-size: 1.1rem;
}

.card-title a {
    color: var(--text-primary);
    text-decoration: none;
}

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

.card-body {
    padding: 24px;
    flex-grow: 1;
}

.card-body p {
    font-size: 0.95rem;
    margin-bottom: 24px;
    color: var(--text-secondary);
}

.card-footer {
    padding: 0 24px 24px 24px;
    background-color: transparent;
    border-top: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.card-tech-tag {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-main);
    padding: 4px 10px;
    border-radius: 100px;
    letter-spacing: 0.02em;
}

/* Blog specific */
.blog-card .card-image {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
    filter: grayscale(100%);
    transition: var(--transition);
}

.blog-card:hover .card-image {
    filter: grayscale(0%);
}

.blog-meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
}

.read-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-primary);
    text-decoration: none;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

/* Resume Section */
.resume-wrapper {
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.resume-iframe {
    width: 100%;
    max-width: 800px;
    height: 600px;
    border: 1px solid var(--border-color);
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--grid-gap);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--grid-gap);
}

.contact-item {
    padding: 24px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.contact-value {
    font-size: 1.1rem;
    color: var(--text-primary);
    text-decoration: none;
}

.contact-value:hover {
    color: var(--accent-grey);
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.25rem;
    transition: var(--transition);
}

.social-link:hover {
    border-color: var(--accent-grey);
    color: var(--accent-grey);
}

.contact-message {
    padding: 32px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 1.1rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    text-transform: uppercase;
}

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

/* Utilities */
.text-center { text-align: center; }
.mb-2 { margin-bottom: 24px; }
.mt-2 { margin-top: 24px; }

/* Responsive */
@media (max-width: 992px) {
    .hero-grid { grid-template-columns: 1fr; }
    .hero-stats { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .timeline-card { grid-template-columns: 150px 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--bg-main);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
    }
    
    .nav-links.active { display: flex; }
    .mobile-menu-btn { display: block; }
    
    .hero-actions { grid-template-columns: 1fr; }
    .hero-title { font-size: 2.5rem; }
    
    .timeline-card { grid-template-columns: 1fr; gap: 8px; }
    .contact-grid { grid-template-columns: 1fr; }
    
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .grid-3 { grid-template-columns: 1fr; }
    .hero-stats { grid-template-columns: 1fr; }
    .social-grid { grid-template-columns: 1fr; }
    .panel { padding: 24px; }
    .hero-main { padding: 32px 24px; }
}