:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a24;
    --text-primary: #e8e8ec;
    --text-secondary: #a0a0b0;
    --accent: #00d4aa;
    --accent-dim: #00a888;
    --accent-glow: rgba(0, 212, 170, 0.3);
    --gradient-1: linear-gradient(135deg, #00d4aa 0%, #00a8ff 100%);
    --gradient-2: linear-gradient(180deg, rgba(0,212,170,0.1) 0%, transparent 100%);
}

#graph-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    pointer-events: none;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

#cursor-dot {
    position: fixed;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    transition: opacity 0.3s ease;
    mix-blend-mode: difference;
}

#cursor-trail {
    position: fixed;
    width: 20px;
    height: 20px;
    background: var(--accent-glow);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transition: all 0.15s ease-out;
    filter: blur(4px);
}

#cursor-trail {
    position: fixed;
    width: 20px;
    height: 20px;
    background: var(--accent-glow);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: all 0.15s ease-out;
    filter: blur(4px);
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

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

main {
    padding-top: 80px;
}

.section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--gradient-1);
    border-radius: 2px;
}

.hero {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    gap: 4rem;
}

.hero-content {
    flex: 1;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -2px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.energy-orb {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, var(--accent-dim), transparent 60%),
                radial-gradient(circle at 70% 70%, #00a8ff, transparent 50%);
    filter: blur(20px);
    animation: orb-pulse 4s ease-in-out infinite;
    position: relative;
}

.energy-orb::before {
    content: '';
    position: absolute;
    inset: -20px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, transparent, var(--accent), transparent);
    animation: orb-rotate 8s linear infinite;
    opacity: 0.5;
}

@keyframes orb-pulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
}

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

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.about-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.link-card, .contact-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.link-card:hover, .contact-card:hover {
    background: var(--bg-secondary);
    border-color: var(--accent);
    transform: translateX(8px);
}

.link-icon, .contact-icon {
    font-size: 1.25rem;
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.publication-item {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.publication-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.publication-item:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 170, 0.3);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.publication-item:hover::before {
    opacity: 1;
}

.pub-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.pub-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.pub-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.pub-type {
    background: var(--bg-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pub-doi {
    color: var(--accent);
    text-decoration: none;
}

.pub-doi:hover {
    text-decoration: underline;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.project-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.language {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.language-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
}

.stars, .forks {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

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

.contact-content p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.contact-card {
    flex-direction: column;
    padding: 2rem;
    min-width: 120px;
}

.contact-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

footer a {
    color: var(--accent);
    text-decoration: none;
    margin-left: 0.5rem;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 6rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-stats {
        justify-content: center;
    }

    .nav-links {
        display: none;
    }

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

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