:root {
    --primary-color: #1a1a1a;
    --secondary-color: #2d2d2d;
    --accent-color: #00ff00;
    --text-color: #ffffff;
    --text-muted: #888;
    --bg-color: #000000;
    --section-bg: #1a1a1a;
    --transition: all 0.3s ease;
    --sidebar-width: 300px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Cormorant Garamond', serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    display: flex;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--primary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
    z-index: 1000;
    border-bottom: 1px solid var(--accent-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--accent-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.profile-image-container {
    display: none;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    background: var(--primary-color);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--accent-color);
    transition: transform 0.3s ease;
}

.profile-section {
    text-align: center;
    margin-bottom: 2rem;
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin-bottom: 1.5rem;
    border: 2px solid var(--accent-color);
    padding: 3px;
    object-fit: cover;
}

.name {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
    font-family: 'Courier New', monospace;
}

.title {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-family: 'Courier New', monospace;
}

.nav-links {
    list-style: none;
    margin-bottom: auto;
}

.nav-links li {
    margin-bottom: 1rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.1rem;
    transition: var(--transition);
    display: block;
    padding: 0.5rem 0;
    font-family: 'Courier New', monospace;
}

.nav-links a:hover {
    color: var(--accent-color);
    transform: translateX(5px);
}

.contact-info {
    margin-top: auto;
    padding-top: 2rem;
    border-top: 1px solid var(--accent-color);
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-family: 'Courier New', monospace;
}

.contact-item i {
    margin-right: 1rem;
    color: var(--accent-color);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-links a {
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: var(--transition);
}

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

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 2rem;
    width: calc(100% - var(--sidebar-width));
    font-family: 'Courier New', monospace;
    transition: margin-left 0.3s ease;
}

section {
    margin-bottom: 4rem;
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

h2 {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--accent-color);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-color);
}

.education {
    margin-top: 2rem;
}

.edu-item {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: var(--secondary-color);
    border-radius: 5px;
    transition: var(--transition);
    border: 1px solid var(--accent-color);
}

.edu-item:hover {
    transform: translateX(10px);
}

.edu-item h4 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--secondary-color);
    border-radius: 5px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--accent-color);
}

.project-card.research {
    background: var(--primary-color);
    border: 2px solid var(--accent-color);
}

.project-card.research:hover {
    box-shadow: 0 0 30px rgba(0, 255, 0, 0.3);
}

.project-card.research .project-content h3 {
    color: var(--accent-color);
}

.project-card.research .tag {
    background: var(--secondary-color);
    border: 1px solid var(--accent-color);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.2);
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

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

.period {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tag {
    background: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.9rem;
    color: var(--text-muted);
    border: 1px solid var(--accent-color);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--secondary-color);
    padding: 1.5rem;
    border-radius: 5px;
    transition: var(--transition);
    border: 1px solid var(--accent-color);
}

.skill-category:hover {
    transform: translateX(5px);
}

.skill-category h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-muted);
}

.skill-category li::before {
    content: '>';
    color: var(--accent-color);
    position: absolute;
    left: 0;
}

/* Resume Button */
.resume-btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: var(--accent-color);
    color: var(--bg-color);
    text-decoration: none;
    border-radius: 5px;
    margin-top: 2rem;
    font-weight: bold;
    transition: var(--transition);
    text-align: left;
}

.resume-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.3);
}

/* Project Link Button */
.project-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: var(--accent-color);
    text-decoration: none;
    border-radius: 5px;
    margin-top: 1rem;
    border: 1px solid var(--accent-color);
    transition: var(--transition);
    text-align: left;
}

.project-link:hover {
    background: var(--accent-color);
    color: var(--bg-color);
}

/* Publications Section */
.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.publication-card {
    background: var(--secondary-color);
    border-radius: 5px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--accent-color);
}

.publication-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.2);
}

.publication-content {
    padding: 1.5rem;
}

.publication-content h3 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.publication-content .status {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-style: italic;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--primary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    z-index: 1000;
    border-bottom: 1px solid var(--accent-color);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.navbar.scrolled {
    background: rgba(26, 26, 26, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.navbar.scrolled .nav-links a,
.navbar.scrolled .name {
    color: var(--text-color);
    font-weight: bold;
}

.nav-left {
    display: flex;
    align-items: center;
    margin-left: 2rem;
}

.nav-center {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-right: 2rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 1rem;
    transition: color 0.3s ease;
    font-family: 'Courier New', monospace;
    font-weight: bold;
}

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

.name {
    font-size: 1.5rem;
    margin: 0;
    color: var(--text-color);
    transition: color 0.3s ease;
    font-weight: bold;
    margin-right: 1rem;
}

.profile-image-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-image {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-color);
    margin: 0;
}

/* Main Content */
.main-content {
    padding: 2rem;
    width: 100%;
    max-width: 1200px;
    margin: 60px auto 0;
    font-family: 'Courier New', monospace;
}

/* Resume Section */
.resume-section {
    margin-top: 4rem;
    margin-bottom: 2rem;
    text-align: center;
    padding: 2rem;
    background: var(--secondary-color);
    border-radius: 5px;
    border: 1px solid var(--accent-color);
}

.resume-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.resume-btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--accent-color);
    color: var(--bg-color);
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: var(--transition);
    font-size: 1.1rem;
}

.resume-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.3);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-color);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 999;
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-content {
    padding: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        flex-direction: column;
    }

    .mobile-menu-btn {
        display: block;
    }

    .profile-image-container {
        display: block;
    }

    .profile-image-container .profile-image {
        width: 40px;
        height: 40px;
        margin: 0;
    }

    .sidebar {
        transform: translateX(-100%);
        width: 80%;
        max-width: 300px;
        z-index: 1001;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 1rem;
        padding-top: 80px;
    }

    .nav-links {
        display: none;
    }

    .navbar {
        padding: 0 1rem;
    }

    .nav-left {
        margin-left: 0;
    }

    .nav-right {
        margin-right: 0;
    }

    .name {
        font-size: 1.2rem;
        margin-right: 0.5rem;
    }

    .profile-image {
        width: 35px;
        height: 35px;
    }

    .main-content {
        padding: 1rem;
        margin-top: 60px;
    }

    .mobile-menu-content {
        padding: 1rem;
    }

    .profile-section {
        text-align: center;
        margin-bottom: 2rem;
    }

    .contact-info {
        margin-top: 2rem;
    }

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

    /* Overlay for mobile menu */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1000;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .resume-section {
        margin-top: 2rem;
        margin-bottom: 1rem;
    }

    .resume-btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* Location style for project cards */
.location {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    font-style: italic;
}