/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-alt: #f9fafb;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

/* Navigation */
.navbar {
    background-color: var(--bg-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: var(--transition);
}

/* Hamburger animation when active */
.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 8rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.highlight {
    color: #fbbf24;
}

.subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.btn {
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
}

.btn-primary {
    background-color: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary-color);
}

.btn-cv {
    background-color: #fbbf24;
    color: #1f2937;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-cv:hover {
    background-color: #f59e0b;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Sections */
.section {
    padding: 5rem 0;
}

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

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-color);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 1rem auto 0;
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 3rem;
}

.profile-image-container {
    flex-shrink: 0;
}

.profile-image {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-lg);
    border: 5px solid var(--primary-color);
    transition: var(--transition);
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.about-text {
    flex: 1;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.about-text ul {
    list-style: none;
    padding: 0;
}

.about-text ul li {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.about-text ul li a {
    color: var(--text-color);
    text-decoration: none;
}

.about-text ul li a:hover {
    color: var(--primary-color);
}

/* Education Section */
.education-timeline {
    max-width: 900px;
    margin: 0 auto;
}

.education-item {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary-color);
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.education-header h3 {
    font-size: 1.3rem;
    color: var(--text-color);
    margin: 0;
}

.location {
    color: var(--text-light);
    font-size: 0.95rem;
}

.education-details {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.degree {
    font-weight: 500;
    color: var(--text-color);
}

.duration {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Publications Section */
.publications-list {
    max-width: 900px;
    margin: 0 auto;
}

.publication-item {
    background-color: var(--bg-color);
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.publication-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.publication-item p {
    margin: 0;
    line-height: 1.8;
    color: var(--text-color);
}

.publication-item a {
    color: var(--text-color);
    text-decoration: none;
}

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

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

.project-card {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.project-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.project-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.project-links {
    display: flex;
    gap: 1rem;
    margin-top: auto;
}

.project-link {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.project-link:hover {
    color: var(--secondary-color);
}

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

.skill-category {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-category h3 i {
    color: var(--primary-color);
}

.skill-description {
    color: var(--text-light);
    line-height: 1.6;
}

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

.skill-list li {
    padding: 0.5rem 0;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
    line-height: 1.6;
}

.skill-list li:last-child {
    border-bottom: none;
}

/* Contact Section */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.contact-email {
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 2rem;
}

.contact-email i {
    margin-right: 0.5rem;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    font-size: 1.5rem;
    transition: var(--transition);
    text-decoration: none;
}

.social-link:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Embedded contact when moved inside About */
.contact-embedded {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* Footer */
.footer {
    background-color: var(--text-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 0;
    }

    .nav-links li {
        margin: 1rem 0;
    }

    .nav-links.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1.2rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .section {
        padding: 3rem 0;
    }

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

    .about-content {
        flex-direction: column;
        text-align: center;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

    .education-header {
        flex-direction: column;
    }

    .education-details {
        flex-direction: column;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero {
        padding: 5rem 0;
    }

    .hero-content h1 {
        font-size: 1.75rem;
    }

    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
}
/* Software Section Specifics */
.software-logo-placeholder {
    width: 100%;
    height: 150px;
    background-color: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
    font-size: 3rem;
    transition: var(--transition);
}

.project-card:hover .software-logo-placeholder {
    background-color: #e5e7eb;
    color: var(--primary-color);
}

/* Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Software Logo Styles */
.software-logo-container {
    width: 100%;
    height: 150px;
    background-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: var(--transition);
}

.software-logo {
    max-width: 96%;
    max-height: 96%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.project-card:hover .software-logo {
    transform: scale(1.1);
}

.project-card:hover .software-logo-container {
    background-color: transparent;
}

/* Publication Item Header Styles */
.publication-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.publication-item h3 a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.publication-item h3 a:hover {
    color: var(--primary-color);
}

/* Section Description */
.section-description {
    text-align: center;
    max-width: 800px;
    margin: -2rem auto 3rem;
    color: var(--text-light);
    font-size: 1.1rem;
}