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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #475569;
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-accent: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

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

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

/* Main Content */
.main-content {
    margin-top: 80px;
    min-height: calc(100vh - 80px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23334155" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    text-align: center;
    z-index: 1;
    position: relative;
}

.profile-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    animation: fadeInUp 1s ease-out;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow-xl);
    position: relative;
    animation: float 3s ease-in-out infinite;
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.profile-image:hover img {
    transform: scale(1.1);
}

.profile-info {
    text-align: center;
}

.name {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: slideInLeft 1s ease-out 0.3s both;
}

.profession {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    animation: slideInRight 1s ease-out 0.6s both;
}

.social-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeIn 1s ease-out 0.9s both;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.social-links a:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Sections */
.about-section,
.education-section {
    padding: 5rem 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.8;
    text-align: justify;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.education-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.education-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.education-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.education-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.education-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.institution {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

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

.description {
    color: var(--text-secondary);
    line-height: 1.6;
}
/* Working experience */

/* Work Experience & Timeline Section */
/* Work Experience & Timeline Section */
.work-section {
    padding: 5rem 0;
    position: relative;
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background: var(--gradient-primary);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
    border-radius: 2px;
}

.timeline-item {
    padding: 1.5rem 2.5rem;
    position: relative;
    width: 50%;
    background: var(--bg-secondary);
    margin-bottom: 3rem;
    border-radius: 8px;
}

/* Left-side items */
.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: 3rem;
    border-left: 4px solid var(--primary-color);
}

/* Right-side items */
.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 3rem;
    border-right: 4px solid var(--primary-color);
}

/* Timeline dots */
.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: var(--primary-color);
    border: 4px solid var(--bg-primary);
    top: 20px;
    border-radius: 50%;
    z-index: 1;
}

/* Dot for left-side items */
.timeline-item:nth-child(odd)::after {
    right: -12px;
}

/* Dot for right-side items */
.timeline-item:nth-child(even)::after {
    left: -12px;
}

.timeline-content {
    position: relative;
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* Animation for Timeline */
.timeline-item.fade-in {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease-out;
}

.timeline-item.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive styles for tablet and mobile */
@media (max-width: 768px) {
    .timeline::after {
        left: 30px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 20px;
        border-left: 4px solid var(--primary-color);
        border-right: none;
    }

    .timeline-item:nth-child(even) {
        left: 0;
    }

    .timeline-item::after {
        left: 18px; /* Aligns dot with the timeline bar */
    }

    .timeline-item:nth-child(even)::after {
        left: 18px; /* Ensures even items also align */
    }
}

/* Working experience end */
/* Page Header */
.page-header {
    padding: 8rem 0 4rem;
    text-align: center;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Work Section */
.work-section {
    padding: 4rem 0;
}

.work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.work-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.work-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.work-image {
    height: 200px;
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-image {
    font-size: 3rem;
    color: var(--primary-color);
}

.work-content {
    padding: 2rem;
}

.work-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.work-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.work-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    background: var(--bg-card);
    color: var(--text-secondary);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    border: 1px solid var(--border-color);
}

.work-links {
    display: flex;
    gap: 1rem;
}

/* Publications Section */
.publications-section {
    padding: 4rem 0;
}

.publications-list {
    max-width: 900px;
    margin: 0 auto;
}

.publication-item {
    display: flex;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.publication-year {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 80px;
}

.publication-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

.publication-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.publication-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Contact Section */
.contact-section {
    padding: 4rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-item i {
    font-size: 1.2rem;
    color: var(--primary-color);
    width: 20px;
}

.contact-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-form {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-outline,
.btn-text {
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

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

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

.btn-text {
    background: transparent;
    color: var(--text-muted);
    padding: 0.5rem 0;
}

.btn-text:hover {
    color: var(--primary-color);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}
/* Footer with all adjustments */
.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr; /* Quick Links wider and shifted right */
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section:first-child {
    padding-left: 15rem; /* Push Quick Links more right */
}

/* Center-align Connect section */
.footer-section:nth-child(2) {
    text-align: center;
}

.footer-section:nth-child(2) h3 {
    margin-bottom: 1rem;
    text-align: left;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.footer-section:nth-child(2) .social-links {
    display: flex;
    justify-content: left;
    align-items: left;
    /* gap: 1rem; */
    align-content: center;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .footer-section:first-child {
        padding-left: 0; /* Remove extra padding on mobile */
    }
    
    .footer-content {
        grid-template-columns: 1fr; /* Stack sections vertically on mobile */
        text-align: center; /* Center all sections on mobile */
    }
}


.footer-section h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    align-items: center;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-section p i {
    color: var(--primary-color);
    width: 16px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-secondary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

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

    .nav-menu a {
        padding: 1rem;
        display: block;
    }

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

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .container {
        padding: 0 1rem;
    }

    .name {
        font-size: 2rem;
    }

    .profession {
        font-size: 1.2rem;
    }

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

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

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .publication-item {
        flex-direction: column;
        gap: 1rem;
    }

    .publication-year {
        min-width: auto;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .profile-image {
        width: 150px;
        height: 150px;
    }

    .name {
        font-size: 1.8rem;
    }

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

    .page-title {
        font-size: 1.8rem;
    }

    .education-card,
    .work-card {
        margin: 0 1rem;
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading animation */
.loading {
    opacity: 0;
    animation: fadeIn 0.5s ease-in-out forwards;
}