:root {
    /* Color Palette - Neural Systems Theme */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-card: rgba(20, 20, 30, 0.6);
    --color-border: rgba(100, 200, 255, 0.1);
    
    --color-accent-blue: #00d4ff;
    --color-accent-cyan: #00fff2;
    --color-accent-violet: #a78bfa;
    
    --color-text-primary: #e8eaed;
    --color-text-secondary: #9ca3af;
    --color-text-muted: #6b7280;
    
    /* Typography */
    --font-heading: 'Space Grotesk', -apple-system, system-ui, sans-serif;
    --font-body: 'Inter', -apple-system, system-ui, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Effects */
    --blur-glass: blur(10px);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
}

/* Neural Network Canvas Background */
#neuralCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.15;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: var(--blur-glass);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-smooth);
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent-cyan);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent-blue);
    transition: width 0.3s ease;
}

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

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

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

/* Section Styling */
.section {
    padding: var(--spacing-xl) 0;
    position: relative;
    z-index: 1;
}

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

.section-tag {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--color-accent-violet);
    display: block;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* Glass Card Effect */
.glass-card {
    background: var(--color-bg-card);
    backdrop-filter: var(--blur-glass);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--spacing-md);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.05), transparent);
    transition: left 0.5s ease;
}

.glass-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.1);
}

.glass-card:hover::before {
    left: 100%;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 80px;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    padding: 0 2rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.2rem;
    background: rgba(0, 255, 242, 0.05);
    border: 1px solid rgba(0, 255, 242, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--color-accent-cyan);
    margin-bottom: var(--spacing-md);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent-cyan);
    border-radius: 50%;
    animation: blink 1.5s infinite;
}

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

.hero-name {
    font-family: var(--font-heading);
    font-size: 4.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-accent-blue);
    margin-bottom: var(--spacing-xs);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.02em;
}

.hero-bio {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-primary, .cta-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition-smooth);
    font-family: var(--font-body);
}

.cta-primary {
    background: linear-gradient(135deg, var(--color-accent-blue), var(--color-accent-cyan));
    color: var(--color-bg-primary);
    border: none;
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.cta-secondary {
    background: rgba(0, 212, 255, 0.05);
    color: var(--color-accent-blue);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.cta-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--color-accent-cyan);
    transform: translateY(-2px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, transparent, var(--color-accent-blue));
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.about-card {
    padding: var(--spacing-lg);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.card-icon i {
    font-size: 1.8rem;
    color: var(--color-accent-cyan);
}

.about-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.degree, .field {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-accent-blue);
    margin-bottom: 0.3rem;
}

.institution {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.gpa, .year {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.expertise-list {
    list-style: none;
    padding: 0;
}

.expertise-list li {
    padding: 0.6rem 0;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.bullet {
    color: var(--color-accent-cyan);
    font-weight: 700;
}

.research-desc {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.research-metrics {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.metric {
    flex: 1;
    text-align: center;
    padding: var(--spacing-sm);
    background: rgba(0, 212, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.metric-value {
    display: block;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent-cyan);
}

.metric-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 0.3rem;
}

/* Experience Timeline */
.timeline {
    position: relative;
    padding: var(--spacing-md) 0;
}

.timeline-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }

.timeline-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.timeline-dot {
    width: 16px;
    height: 16px;
    background: var(--color-bg-secondary);
    border: 3px solid var(--color-accent-blue);
    border-radius: 50%;
    position: relative;
    z-index: 2;
}

.timeline-dot.active {
    background: var(--color-accent-cyan);
    border-color: var(--color-accent-cyan);
    box-shadow: 0 0 20px var(--color-accent-cyan);
    animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 255, 242, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 255, 242, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 255, 242, 0);
    }
}

.timeline-line {
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-accent-blue), transparent);
    margin-top: 8px;
}

.timeline-content {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    position: relative;
}

.timeline-badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(0, 255, 242, 0.1);
    color: var(--color-accent-cyan);
    border: 1px solid var(--color-accent-cyan);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.role-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.company {
    font-size: 1.1rem;
    color: var(--color-accent-blue);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.duration, .location {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 0.3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.duration i, .location i {
    color: var(--color-accent-violet);
}

.role-highlights {
    list-style: none;
    margin: var(--spacing-md) 0;
    padding: 0;
}

.role-highlights li {
    padding: 0.7rem 0;
    color: var(--color-text-secondary);
    line-height: 1.7;
    display: flex;
    gap: 0.75rem;
}

.highlight-bullet {
    color: var(--color-accent-cyan);
    font-weight: 700;
    font-size: 1.2rem;
    line-height: 1.5;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: var(--spacing-md);
}

.tech-tag {
    padding: 0.4rem 0.9rem;
    background: rgba(167, 139, 250, 0.08);
    color: var(--color-accent-violet);
    border: 1px solid rgba(167, 139, 250, 0.2);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.tech-tag:hover {
    background: rgba(167, 139, 250, 0.15);
    border-color: var(--color-accent-violet);
}

/* Research Section */
.research-category {
    margin-bottom: var(--spacing-xl);
}

.category-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.category-title i {
    color: var(--color-accent-cyan);
}

/* Publication Card */
.publication-card {
    padding: var(--spacing-lg);
}

.pub-header {
    display: flex;
    gap: var(--spacing-md);
}

.pub-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(0, 212, 255, 0.2);
    flex-shrink: 0;
}

.pub-icon i {
    font-size: 1.5rem;
    color: var(--color-accent-cyan);
}

.pub-details h4 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.pub-venue {
    font-size: 0.95rem;
    color: var(--color-accent-blue);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.pub-desc {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(450px, 1fr));
    gap: var(--spacing-md);
}

.article-card {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.article-date {
    color: var(--color-accent-violet);
}

.article-time {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.article-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.article-excerpt {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

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

.tag {
    padding: 0.3rem 0.7rem;
    background: rgba(0, 212, 255, 0.05);
    color: var(--color-accent-blue);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.article-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-accent-cyan);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.article-link:hover {
    gap: 0.8rem;
    color: var(--color-accent-blue);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-md);
}

.skill-category {
    padding: var(--spacing-lg);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.category-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.category-icon i {
    font-size: 1.5rem;
    color: var(--color-accent-cyan);
}

.category-header h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--color-text-primary);
}

.skills-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.8rem;
    background: rgba(0, 212, 255, 0.03);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 6px;
    color: var(--color-text-secondary);
    transition: var(--transition-smooth);
}

.skill-item i {
    color: var(--color-accent-blue);
    font-size: 1.2rem;
}

.skill-item:hover {
    background: rgba(0, 212, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateX(5px);
}

/* Contact Section */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(0, 212, 255, 0.2);
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.8rem;
    color: var(--color-accent-cyan);
}

.contact-info h4 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--color-text-primary);
    margin-bottom: 0.3rem;
}

.contact-info p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    word-break: break-word;
}

.contact-card:hover .contact-icon {
    background: rgba(0, 212, 255, 0.2);
    transform: scale(1.05);
}

/* Footer */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.footer-content {
    text-align: center;
}

.footer-text {
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.footer-tagline {
    font-family: 'Courier New', monospace;
    color: var(--color-accent-violet);
    font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .hero-name {
        font-size: 3.5rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: 1.5rem;
    }
    
    .nav-links a {
        font-size: 0.85rem;
    }
    
    .hero-name {
        font-size: 2.5rem;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-grid,
    .skills-grid,
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline-item {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .timeline-marker {
        flex-direction: row;
        width: 100%;
    }
    
    .timeline-line {
        width: 100%;
        height: 2px;
        margin-left: 8px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-primary, .cta-secondary {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-name {
        font-size: 2rem;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .nav-content {
        padding: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
        font-size: 0.8rem;
    }
}

/* Animation utilities for scroll reveals */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}