:root {
    --primary-color: #2c2c2c;
    --secondary-color: #666666;
    --background-color: #f8f6f2;
    --navbar-color: #ffffff;
    --accent-color: #8c8c8c;
    --light-gray: #ffffff;
    --border-color: #e0e0e0;
    --text-color: #333333;
}

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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    min-height: 100vh;
}

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

/* Navbar */
.navbar {
    position: fixed;
    width: 100%;
    background-color: var(--navbar-color);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--primary-color);
    letter-spacing: 2px;
    margin-right: 3rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 3rem;
    margin-left: auto;
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.85rem;
    transition: color 0.3s ease;
}

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

.page-content {
    display: none;
    padding: 120px 20px 60px;
    min-height: 100vh;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.page-content.active {
    display: block;
    opacity: 1;
}

/* Home Page */
.home-content {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 120px);
    text-align: center;
    padding: 2rem;
}

.home-content h1 {
    font-size: 2.8rem;
    font-weight: 300;
    color: var(--primary-color);
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.home-content p {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
    font-weight: 300;
}

/* About Page */
.about-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.about-content h2, .research-content h2, .projects-content h2, .experience-content h2{
    font-size: 2rem;
    font-weight: 300;
    color: var(--primary-color);
    margin-bottom: 2rem;
    letter-spacing: 1px;
}

.about-text p, .research-item p, .project-item p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 2rem;
    font-size: 1.1rem;
    font-weight: 300;
    text-align: justify;
}

/* Research and Projects Sections */
.research-content, .projects-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.research-item, .project-item {
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: var(--light-gray);
    border: 1px solid var(--border-color);
}

.research-item h3, .project-item h3 {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-weight: 400;
    color: var(--secondary-color);
    margin-bottom: 1.2rem;
    font-size: 1.2rem;
}

.research-item ul, .project-item ul {
    list-style-type: none;
    padding-left: 0;
}

.research-item li, .project-item li {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    text-align: justify;
}

.research-item li:before, .project-item li:before {
    content: "•";
    color: var(--accent-color);
    position: absolute;
    left: 0;
}

/* Tech Stack Section */
.tech-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.tech-content h2 {
    font-size: 2rem;
    font-weight: 300;
    color: var(--primary-color);
    margin-bottom: 3rem;
    letter-spacing: 1px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.tech-section {
    margin-bottom: 2rem;
    background-color: var(--light-gray);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.tech-section h3 {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-weight: 400;
    color: var(--secondary-color);
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
}

.experience-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.experience-item {
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: var(--light-gray);
    border: 1px solid var(--border-color);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.experience-item h3 {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-weight: 400;
    color: var(--secondary-color);
    margin-bottom: 1.2rem;
    font-size: 1.2rem;
}

/* Match font, spacing, and justification with research boxes */
.experience-item ul {
    list-style-type: none;
    padding-left: 0;
}

.experience-item li {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    text-align: justify;
    font-size: 1.1rem;
    font-weight: 300;
}

.experience-item li::before {
    content: "•";
    color: var(--accent-color);
    position: absolute;
    left: 0;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tags span {
    background-color: var(--background-color);
    color: var(--text-color);
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
    font-weight: 300;
    border: 1px solid var(--border-color);
}

.project-link {
    text-decoration: none;
    color: inherit;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s ease;
}

.project-link:hover {
    color: #007bff;
}

.project-link i {
    font-size: 0.9em;
    opacity: 0.7;
}

.project-link:hover i {
    opacity: 1;
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.social-links a {
    color: var(--secondary-color);
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

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

/* Footer */
footer {
    padding: 1rem 0;
    background-color: var(--background-color);
    color: var(--secondary-color);
    text-align: center;
    font-weight: 300;
    font-size: 0.9rem;
    position: fixed;
    bottom: 0;
    width: 100%;
    border-top: 1px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        gap: 1.5rem;
    }
    
    .nav-links a {
        font-size: 0.75rem;
    }
    
    .research-item, .project-item {
        padding: 1.5rem;
    }
    
    .home-content h1 {
        font-size: 2rem;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .skill-tags span {
        font-size: 0.85rem;
        padding: 0.4rem 0.8rem;
    }
    
    .about-text p, .research-item p, .project-item p {
        text-align: left;
    }
}