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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #2d3748;
    background-color: #ffffff;
}

.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);
    border-bottom: 1px solid #e2e8f0;
    z-index: 1000;
    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;
    height: 70px;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-logo a:hover {
    color: #4299e1;
}

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

.nav-link {
    color: #4a5568;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #4299e1;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #4299e1;
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background-color: #2d3748;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #4299e1;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.2rem;
    color: #4a5568;
    margin-bottom: 2.5rem;
    line-height: 1.7;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: #4299e1;
    color: white;
    border-color: #4299e1;
}

.btn-primary:hover {
    background-color: #3182ce;
    border-color: #3182ce;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: #4299e1;
    border-color: #4299e1;
}

.btn-secondary:hover {
    background-color: #4299e1;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.3);
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #4299e1;
}

/* About Section */
.about {
    background-color: #f7fafc;
}

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

.about-content p {
    font-size: 1.1rem;
    color: #4a5568;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* Education Section */
.education-card {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    max-width: 900px;
    margin: 0 auto;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.education-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

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

.education-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1a202c;
}

.education-date {
    color: #4299e1;
    font-weight: 500;
    font-size: 1rem;
}

.education-institution {
    font-size: 1.2rem;
    color: #4a5568;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.education-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.education-item {
    color: #4a5568;
    font-size: 1rem;
}

.coursework h4 {
    color: #1a202c;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.coursework-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.course {
    background-color: #edf2f7;
    color: #4a5568;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.course:hover {
    background-color: #4299e1;
    color: white;
}

/* Experience Section */
.experience {
    background-color: #f7fafc;
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.experience-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.experience-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

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

.experience-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1a202c;
}

.experience-date {
    color: #4299e1;
    font-weight: 500;
    font-size: 0.9rem;
}

.experience-company {
    color: #4a5568;
    font-weight: 500;
    margin-bottom: 1rem;
}

.experience-description {
    list-style: none;
    padding: 0;
}

.experience-description li {
    color: #4a5568;
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
    line-height: 1.6;
}

.experience-description li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: #4299e1;
    font-size: 0.8rem;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 4px solid #4299e1;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

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

.project-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 0.5rem;
}

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

.tag {
    background-color: #4299e1;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-description {
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

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

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #4299e1;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.project-link:hover {
    color: #3182ce;
}

/* Skills Section */
.skills {
    background-color: #f7fafc;
}

/* Certifications Section */
.certifications {
    background-color: white;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.certification-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid #4299e1;
}

.certification-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

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

.certification-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1a202c;
    line-height: 1.3;
}

.certification-date {
    color: #4299e1;
    font-weight: 500;
    font-size: 0.9rem;
    white-space: nowrap;
}

.certification-issuer {
    color: #4a5568;
    font-weight: 500;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.certification-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background-color: #edf2f7;
    color: #4a5568;
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.skill-tag:hover {
    background-color: #4299e1;
    color: white;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.skill-category h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 1.5rem;
    text-align: center;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: center;
}

.skill-item {
    background-color: #edf2f7;
    color: #4a5568;
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.skill-item:hover {
    background-color: #4299e1;
    color: white;
    transform: translateY(-2px);
}

/* Contact Section */
.contact-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}



.contact-description {
    font-size: 1.1rem;
    color: #4a5568;
    margin-bottom: 2rem;
    line-height: 1.7;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: #4a5568;
    font-size: 1.1rem;
}

.contact-item i {
    color: #4299e1;
    font-size: 1.2rem;
    width: 20px;
}

.contact-item a {
    color: #4a5568;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: #4299e1;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: #edf2f7;
    color: #4a5568;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1.5rem;
}

.social-link:hover {
    background-color: #4299e1;
    color: white;
    transform: translateY(-3px);
}

/* Footer */
.footer {
    background-color: #1a202c;
    color: #a0aec0;
    text-align: center;
    padding: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .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;
        gap: 1rem;
    }

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

    .nav-toggle {
        display: flex;
    }

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

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

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

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

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

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

    .btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }

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

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

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

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

    .contact-info {
        align-items: flex-start;
        text-align: left;
    }

    .social-links {
        justify-content: flex-start;
    }
}

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

    .hero {
        padding: 100px 0 60px;
    }

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

    section {
        padding: 60px 0;
    }

    .education-card,
    .experience-card,
    .project-card,
    .skill-category {
        padding: 1.5rem;
    }

    .coursework-list {
        justify-content: center;
    }

    .skill-items {
        justify-content: flex-start;
    }
}

/* Smooth scroll offset for fixed navigation */
section {
    scroll-margin-top: 80px;
}

/* Loading animation for smooth transitions */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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