/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: #1a1a1a;
    --bg-card-hover: #222222;

    /* Accent Colors */
    --accent-primary: #17f700;
    --accent-secondary: #00d4ff;
    --accent-gradient: linear-gradient(135deg, #17f700 0%, #00d4ff 100%);

    /* Text Colors */
    --text-primary: #f7f7f7;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;

    /* Borders */
    --border-color: #2a2a2a;
    --border-radius: 12px;
    --border-radius-sm: 6px;

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Typography */
    --font-primary: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

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

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

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

/* ========================================
   Container
   ======================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: transparent;
    transition: background var(--transition-normal), padding var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo-img {
    height: 32px;
    width: auto;
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-normal);
}

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

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

/* Language Switcher */
.nav-link.lang-link {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-weight: 500;
}

.nav-link.lang-link:hover {
    border-color: var(--accent-primary);
    background: rgba(23, 247, 0, 0.1);
}

.nav-link.lang-link::after {
    display: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 24px 60px;
}

/* Global Wavy Background */
.global-waves-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.25;
}

.hero-background {
    display: none;
    /* Use global waves instead */
}

.hero-content {
    max-width: 700px;
}

.hero-avatar {
    width: 180px;
    height: 180px;
    margin: 0 auto 32px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--accent-primary);
    box-shadow: 0 0 40px rgba(23, 247, 0, 0.2);
}

.hero-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-name {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.hero-affiliation {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
}

.tag {
    padding: 6px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

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

.hero-links {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    font-size: 1.25rem;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
    transform: translateY(-4px);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-10px);
    }

    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: var(--section-padding);
}

.section-alt {
    background: var(--bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 48px;
}

/* ========================================
   About Section
   ======================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 48px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

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

.education-timeline h3 {
    font-size: 1.25rem;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.timeline {
    position: relative;
    padding-left: 24px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 32px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -29px;
    top: 8px;
    width: 12px;
    height: 12px;
    background: var(--accent-primary);
    border-radius: 50%;
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--accent-primary);
    font-weight: 500;
}

.timeline-content h4 {
    font-size: 1.1rem;
    margin: 4px 0;
    color: var(--text-primary);
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* ========================================
   Research Section
   ======================================== */
.research-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.research-highlight {
    display: flex;
    gap: 48px;
    align-items: center;
    margin-top: 48px;
}

.research-image {
    flex: 0 0 600px;
}

.research-image img {
    width: 100%;
    border-radius: var(--border-radius);
}

.research-description {
    flex: 1;
}

.research-description h3 {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

.research-description p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.research-description strong {
    color: var(--accent-primary);
}

.research-description ul {
    list-style: none;
    padding: 0;
    margin-bottom: 16px;
}

.research-description li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

.research-description li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

.research-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px 32px;
    text-align: center;
    transition: var(--transition-normal);
}

.research-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.research-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border-radius: 50%;
    font-size: 1.75rem;
    color: var(--bg-primary);
}

.research-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.research-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Publications Section
   ======================================== */
.publications-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}

.filter-btn {
    padding: 10px 24px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.publications-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-height: 450px;
    overflow-y: auto;
    padding: 5px 10px 5px 5px;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-primary) var(--bg-card);
}

.publications-list::-webkit-scrollbar {
    width: 8px;
}

.publications-list::-webkit-scrollbar-track {
    background: var(--bg-card);
    border-radius: 4px;
}

.publications-list::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

.publications-list::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* Style for pub-item (used in HTML) */
.pub-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px 24px;
    transition: var(--transition-normal);
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

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

.pub-year {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
    min-width: 50px;
}

.pub-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 1.4;
}

.pub-authors {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.pub-venue {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.publication-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px 24px;
    transition: var(--transition-normal);
    position: relative;
}

.publication-item:hover {
    box-shadow: inset 0 0 0 2px var(--accent-primary);
}

.publication-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 1.4;
}

.publication-authors {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.publication-authors .me {
    color: var(--accent-primary);
    font-weight: 500;
}

.publication-venue {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 16px;
}

.publication-links {
    display: flex;
    gap: 12px;
}

.pub-link {
    padding: 6px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
}

.pub-link:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ========================================
   Awards Section
   ======================================== */
.awards-list {
    max-width: 700px;
    margin: 48px auto 0;
}

.award-item {
    display: flex;
    gap: 24px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.award-item:last-child {
    border-bottom: none;
}

.award-year {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-primary);
    min-width: 60px;
}

.award-content h4 {
    font-size: 1.05rem;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.award-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ========================================
   Contact Section
   ======================================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 48px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-item i {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    font-size: 1.1rem;
    color: var(--accent-primary);
}

.contact-item h4 {
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.contact-item p,
.contact-item a {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.contact-item a:hover {
    color: var(--accent-primary);
}

.contact-social {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.social-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.social-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateX(8px);
}

.social-btn i {
    font-size: 1.25rem;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: 40px 0;
    background: var(--bg-secondary);
    text-align: center;
    border-top: 1px solid var(--border-color);
}

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

.footer-update {
    margin-top: 8px;
    font-size: 0.8rem;
}

/* ========================================
   Welcome Modal
   ======================================== */
.welcome-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.welcome-modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.welcome-content {
    text-align: center;
    animation: welcomeFadeIn 0.8s ease;
}

@keyframes welcomeFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.welcome-content h2 {
    font-size: 2.5rem;
    margin-bottom: 12px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.welcome-btn {
    padding: 16px 48px;
    background: var(--accent-gradient);
    border: none;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--bg-primary);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.welcome-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(23, 247, 0, 0.4);
}

.welcome-btn i {
    margin-right: 8px;
}

/* ========================================
   Music Player (Enhanced)
   ======================================== */
.music-player {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
}

.music-toggle-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
    position: relative;
}

.music-toggle-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: scale(1.1);
}

.music-toggle-btn.playing {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.music-toggle-btn i {
    font-size: 1.1rem;
}

.music-toggle-btn.playing>i {
    display: none;
}

.playing-indicator {
    display: none;
}

.music-toggle-btn.playing .playing-indicator {
    display: flex;
}

/* Music Panel */
.music-panel {
    position: absolute;
    bottom: 60px;
    right: 0;
    width: 280px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.music-player.expanded .music-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.music-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.music-title {
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

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

.music-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.music-ctrl-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.music-ctrl-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.music-ctrl-btn.play-pause {
    width: 44px;
    height: 44px;
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

.music-ctrl-btn.play-pause:hover {
    transform: scale(1.1);
    color: var(--bg-primary);
}

/* Volume Slider */
.music-volume {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.music-volume i {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.volume-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--accent-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

/* Playlist */
.music-playlist {
    max-height: 150px;
    overflow-y: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
}

.playlist-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.playlist-item:hover {
    background: var(--bg-secondary);
}

.playlist-item.active {
    background: var(--bg-secondary);
}

.playlist-item.active .playlist-name {
    color: var(--accent-primary);
}

.playlist-icon {
    font-size: 0.8rem;
    color: var(--text-muted);
    width: 16px;
}

.playlist-item.active .playlist-icon {
    color: var(--accent-primary);
}

.playlist-name {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Music Wave Animation */
.music-wave {
    display: none;
    align-items: flex-end;
    gap: 3px;
    height: 16px;
}

.music-wave span {
    width: 3px;
    background: var(--accent-primary);
    border-radius: 2px;
    animation: musicWave 0.8s ease-in-out infinite;
}

.music-wave span:nth-child(1) {
    height: 8px;
    animation-delay: 0s;
}

.music-wave span:nth-child(2) {
    height: 14px;
    animation-delay: 0.2s;
}

.music-wave span:nth-child(3) {
    height: 10px;
    animation-delay: 0.4s;
}

@keyframes musicWave {

    0%,
    100% {
        transform: scaleY(0.5);
    }

    50% {
        transform: scaleY(1);
    }
}

/* ========================================
   Visitor Counter
   ======================================== */
.visitor-counter {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 999;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.visitor-counter:hover {
    border-color: var(--accent-primary);
}

.visitor-counter i {
    color: var(--accent-primary);
}

#visitor-count {
    color: var(--accent-primary);
    font-weight: 600;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .research-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transition: right var(--transition-normal);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .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-name {
        font-size: 2.25rem;
    }

    .hero-avatar {
        width: 140px;
        height: 140px;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .publication-item {
        padding: 20px;
    }

    .publication-links {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 1.75rem;
    }

    .hero-links {
        gap: 12px;
    }

    .social-link {
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
    }

    .section {
        padding: 60px 0;
    }

    .research-card {
        padding: 28px 20px;
    }
}