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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 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 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: #2563eb;
    font-weight: 600;
}

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

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #2563eb;
}

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

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-description {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    opacity: 0.8;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.6s both;
}

.btn {
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: white;
    color: #2563eb;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

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

.btn-secondary:hover {
    background: white;
    color: #2563eb;
}

.hero-social {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 1s ease 0.8s both;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: white;
    color: #2563eb;
    transform: translateY(-3px);
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 3rem;
    color: #333;
}

/* About Section */
.about {
    background: #f8fafc;
}

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

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #666;
    text-align: left;
}

/* Education Timeline */
.education-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: #2563eb;
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 30px;
    position: relative;
    margin: 50px 0;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    align-self: flex-end;
    justify-content: flex-start;
    padding-left: 30px;
    padding-right: 0;
}

.timeline-dot {
    height: 20px;
    width: 20px;
    background: #2563eb;
    border-radius: 50%;
    position: absolute;
    top: 0;
    right: -10px;
}

.timeline-item:nth-child(odd) .timeline-dot {
    left: -10px;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    max-width: 400px;
}

.timeline-content h3 {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    color: #333;
    margin-bottom: 0.5rem;
}

.timeline-date {
    color: #666;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Experience Section */
.experience {
    background: #f8fafc;
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
}

.experience-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.experience-card:hover {
    transform: translateY(-5px);
}

.experience-header h3 {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.experience-header h4 {
    color: #333;
    margin-bottom: 0.5rem;
}

.experience-date {
    color: #666;
    font-size: 0.9rem;
    font-weight: 500;
}

.experience-list {
    margin-top: 1rem;
    padding-left: 1rem;
}

.experience-list li {
    margin-bottom: 0.5rem;
    color: #666;
}

/* Academic Programs Section */
.academic-programs {
    background: #f8fafc;
}

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

.program-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.program-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

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

.program-header h3 {
    color: #333;
    font-weight: 600;
    font-size: 1.2rem;
    margin: 0;
    flex: 1;
}

.program-date {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
}

.program-duration {
    color: #888;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-style: italic;
}

.program-description {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.certification-item {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.certification-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.cert-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.certification-item h4 {
    color: #333;
    font-weight: 600;
    font-size: 1rem;
    margin: 0;
    line-height: 1.4;
}

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

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
}

.project-header {
    margin-bottom: 1rem;
}

.project-header h3 {
    color: #333;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.tag {
    background: #e0e7ff;
    color: #2563eb;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-description {
    color: #666;
    line-height: 1.6;
}

/* Hobby Projects Section */
.hobby-projects {
    background: #f8fafc;
}

.hobby-projects-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hobby-intro {
    margin-bottom: 3rem;
}

.hobby-intro p {
    font-size: 1.1rem;
    color: #666;
    max-width: 700px;
    margin: 0 auto;
}

.hobby-projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.hobby-project-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hobby-project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.hobby-project-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.hobby-project-card h3 {
    color: #333;
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.hobby-project-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 0;
}

.hobby-projects-cta {
    margin-top: 2rem;
}

.hobby-projects-cta .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    padding: 15px 35px;
}

.hobby-projects-cta .btn i {
    font-size: 1rem;
}

/* Skills Section */
.skills {
    background: #f8fafc;
}

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

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.skill-category h3 {
    color: #333;
    font-weight: 600;
    margin-bottom: 1rem;
}

.skill-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.skill-tag {
    background: #2563eb;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Contact Section */
.contact {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.contact .section-title {
    color: white;
}

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

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.contact-info p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.contact-details {
    display: grid;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
    transition: background 0.3s ease;
}

.contact-item:hover {
    background: rgba(255,255,255,0.2);
}

.contact-item i {
    font-size: 1.2rem;
}

.contact-item a {
    color: white;
    text-decoration: none;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

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

/* Accessibility Improvements */
.nav-link:focus,
.btn:focus,
.social-link:focus,
.contact-item a:focus {
    outline: 2px solid #2563eb;
    outline-offset: 2px;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #2563eb;
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1001;
}

.skip-link:focus {
    top: 6px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .hero {
        background: #000;
        color: #fff;
    }

    .btn-primary {
        background: #fff;
        color: #000;
        border: 2px solid #000;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }

    .hero-title {
        font-size: 3rem;
    }

    .section-title {
        font-size: 2.2rem;
    }
}

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

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 2rem 0;
        height: calc(100vh - 70px);
        overflow-y: auto;
    }

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

    .nav-item {
        margin: 1rem 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.3rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .btn {
        width: 200px;
        text-align: center;
    }



    .education-timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 0;
        justify-content: flex-start;
    }

    .timeline-item:nth-child(odd) {
        padding-left: 50px;
        padding-right: 0;
        justify-content: flex-start;
    }

    .timeline-dot {
        left: 10px !important;
    }

    .timeline-content {
        max-width: none;
        padding: 1.5rem;
    }

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

    .experience-card {
        padding: 1.5rem;
    }

    .programs-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .program-card {
        padding: 1.5rem;
    }

    .program-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .program-date {
        align-self: flex-start;
    }

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

    .certification-item {
        padding: 1rem;
    }

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

    .project-card {
        padding: 1.5rem;
    }

    .hobby-projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .hobby-project-card {
        padding: 1.5rem;
    }

    .hobby-projects-cta .btn {
        padding: 12px 25px;
        font-size: 1rem;
    }

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

    .skill-category {
        padding: 1.5rem;
    }

    .contact-details {
        gap: 0.5rem;
    }

    .contact-item {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    section {
        padding: 60px 0;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 2rem;
    }



    .timeline-content {
        padding: 1rem;
    }

    .experience-card,
    .project-card,
    .skill-category {
        padding: 1rem;
    }

    .hero-social {
        gap: 0.5rem;
    }

    .social-link {
        width: 40px;
        height: 40px;
    }

    .skill-tags {
        gap: 0.25rem;
    }

    .skill-tag {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .project-tags {
        gap: 0.25rem;
    }

    .tag {
        padding: 0.2rem 0.6rem;
        font-size: 0.75rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .hero-buttons,
    .hero-social,
    .hamburger {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }

    .hero {
        background: none;
        color: #000;
        min-height: auto;
        padding: 2rem 0;
    }

    section {
        padding: 1rem 0;
        page-break-inside: avoid;
    }

    .section-title {
        font-size: 18pt;
        margin-bottom: 1rem;
    }
}