:root {
    --primary-color: #2d3436;
    --secondary-color: #636e72;
    --accent-color: #0984e3;
    --background-color: #ffffff;
    --text-color: #2d3436;
    --light-gray: #f5f6fa;
    --border-color: #dfe6e9;
    --transition: all 0.3s ease;
}

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

html {
    overflow-x: hidden;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    overflow-x: hidden;
    overflow-wrap: break-word;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--background-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav-content {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: -100px;
    z-index: 2000;
    padding: 0.6rem 1rem;
    background: var(--accent-color);
    color: #fff;
    font-weight: 600;
    border-radius: 4px;
    text-decoration: none;
}

.skip-link:focus {
    top: 1rem;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
}

.nav-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 1.25rem;
}

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--primary-color);
    margin: 5px 0;
    transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
    min-height: auto;
    display: flex;
    align-items: center;
    padding: 8rem 2rem 4rem;
    background-color: var(--light-gray);
}

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

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero h2,
.hero-role {
    font-size: 1.25rem;
    color: var(--secondary-color);
    margin-bottom: 1.25rem;
    font-weight: 600;
}

.about-copy .hero-role {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.hero p {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.hero-cta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    margin: 0.5rem;
}

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

.btn.secondary {
    background-color: transparent;
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Featured project */
.featured-project {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.featured-project h2 {
    text-align: center;
    margin-bottom: 0.5rem;
}

.featured-intro {
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
}

.featured-grid .project-card {
    margin-bottom: 0;
    display: flex;
    flex-direction: column;
}

.featured-grid .project-card .project-links {
    margin-top: auto;
}

.project-card.featured-lead {
    grid-column: 1 / -1;
}

.project-tags {
    margin: 1rem 0;
}

.project-tags span {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background-color: var(--light-gray);
    border-radius: 15px;
    font-size: 0.9rem;
    margin: 0.3rem;
}

/* Footer */
footer {
    background-color: var(--light-gray);
    padding: 3rem 2rem 1rem;
}

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

.footer-info h3,
.footer-info .footer-name {
    margin-bottom: 0.25rem;
    font-size: 1.17em;
    font-weight: 700;
}

.footer-info p {
    color: var(--secondary-color);
}

.footer-links {
    display: flex;
    gap: 1.25rem;
}

.footer-links a {
    color: var(--secondary-color);
    font-size: 1.35rem;
    text-decoration: none;
    transition: var(--transition);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* About */
.about-hero {
    padding: 8rem 2rem 4rem;
    background-color: var(--light-gray);
}

.about-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

.about-grid {
    display: grid;
    grid-template-columns: minmax(0, 360px) 1fr;
    gap: 2.5rem;
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.profile-image {
    width: 100%;
    max-width: 360px;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 12px;
    border: 3px solid var(--accent-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.about-copy h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.about-bio {
    font-size: 1.1rem;
    margin-bottom: 1.25rem;
    color: var(--secondary-color);
}

.location-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.about-copy .social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.about-copy .social-links a {
    color: var(--accent-color);
    text-decoration: none;
}

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

.skills-section {
    padding: 4rem 0;
}

.skills-section h2 {
    text-align: center;
    margin-bottom: 1rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

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

.skill-category li {
    margin: 0.5rem 0;
    color: var(--secondary-color);
    position: relative;
    padding-left: 1.5rem;
}

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

/* Projects */
.projects-hero,
.career-hero {
    padding: 6rem 0 3rem;
    background-color: var(--light-gray);
    text-align: center;
}

.projects-hero h1,
.career-hero h1 {
    margin-bottom: 1rem;
    font-size: 2.5rem;
    color: var(--primary-color);
}

.section-intro {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.2rem;
    color: var(--secondary-color);
    line-height: 1.6;
}

.projects-grid {
    padding: 4rem 0;
}

.project-card {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    padding: 2rem;
    transition: transform 0.3s ease;
}

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

.project-content h2,
.featured-project h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.project-description,
.featured-project .project-card p {
    color: var(--secondary-color);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.project-tech,
.project-features {
    margin-bottom: 1.5rem;
}

.project-tech h3,
.project-features h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
}

.tech-list,
.project-features ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    list-style: none;
    padding: 0;
}

.tech-list li {
    background: var(--light-gray);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.project-features ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

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

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

/* Career */
.career-timeline {
    padding: 4rem 0;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    height: 100%;
    background: var(--accent-color);
}

.timeline-item {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 3rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 0;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-color);
    border: 2px solid white;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.timeline-date {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

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

.timeline-content h4 {
    color: var(--secondary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

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

.responsibilities,
.achievements {
    margin-bottom: 1.5rem;
}

.responsibilities,
.achievements ul {
    list-style: none;
    padding: 0;
}

.responsibilities li,
.achievements li {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    line-height: 1.6;
    position: relative;
    padding-left: 1.5rem;
}

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

.tech-stack h5,
.achievements h5 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
}

/* Contact */
.contact-hero {
    padding: 8rem 2rem 4rem;
    background-color: var(--light-gray);
}

.contact-content {
    max-width: 1200px;
    margin: 0 auto;
}

.contact-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.contact-intro {
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 2rem;
}

.contact-form-container {
    background-color: var(--background-color);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(9, 132, 227, 0.1);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-info h2,
.contact-info h3 {
    color: var(--primary-color);
}

.info-card {
    background-color: var(--background-color);
    padding: 1.5rem 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.info-card i {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.info-card h3,
.info-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.35rem;
    font-size: 1.1rem;
}

.info-card p,
.info-card a {
    color: var(--accent-color);
    text-decoration: none;
}

.info-card a:hover {
    color: var(--primary-color);
}

/* Blog */
.blog-hero {
    padding: 8rem 2rem 4rem;
    background-color: var(--light-gray);
    min-height: 60vh;
}

.blog-content {
    max-width: 1200px;
    margin: 0 auto;
}

.blog-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.blog-intro {
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.blog-empty {
    text-align: center;
    color: var(--secondary-color);
    font-style: italic;
    background: var(--background-color);
    padding: 3rem 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.blog-grid {
    display: grid;
    gap: 1.5rem;
}

.blog-card {
    background: var(--background-color);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.blog-card .blog-meta {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.blog-card h2 {
    font-size: 1.45rem;
    margin-bottom: 0.75rem;
}

.blog-card h2 a {
    color: var(--primary-color);
    text-decoration: none;
}

.blog-card h2 a:hover {
    color: var(--accent-color);
}

.blog-card p {
    color: var(--secondary-color);
    margin-bottom: 1.25rem;
}

.article-hero,
.writeup-hero {
    padding: 8rem 2rem 2rem;
    background-color: var(--light-gray);
}

.article-hero h1,
.writeup-hero h1 {
    font-size: 2.25rem;
    margin-bottom: 0.75rem;
}

.article-meta {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.article-body,
.writeup-body {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.article-body p,
.writeup-body p,
.article-body li,
.writeup-body li {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.article-body h2,
.writeup-body h2 {
    margin: 2rem 0 0.75rem;
    font-size: 1.4rem;
}

.article-body ul,
.writeup-body ul {
    padding-left: 1.25rem;
    margin-bottom: 1.25rem;
}

.qualifications,
.certifications-section,
.education-section {
    padding: 0 0 4rem;
}

.career-timeline h2,
.education-section h2,
.certifications-section h2,
.qualifications h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

.qualifications-list,
.cert-list {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}

.qualifications-list li,
.cert-list li {
    background: var(--background-color);
    padding: 1.1rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    margin-bottom: 0.75rem;
    color: var(--secondary-color);
}

.qualifications-list strong,
.cert-list strong {
    color: var(--primary-color);
}

.contact-grid.contact-only {
    grid-template-columns: 1fr;
    max-width: 720px;
    margin: 0 auto;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.writeup-tags {
    margin: 1rem 0 1.5rem;
}

@media (max-width: 1100px) {
    .nav-links {
        gap: 0.9rem;
        font-size: 0.95rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-content {
        padding: 1rem 1.25rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--background-color);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
        padding: 0.5rem 0 1rem;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        padding: 0.75rem 1.5rem;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero {
        min-height: auto;
        padding: 7rem 1.25rem 3rem;
    }

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

    .hero h2,
    .hero-role {
        font-size: 1.05rem;
    }

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

    .btn {
        width: 100%;
        max-width: 300px;
        margin: 0.35rem 0;
        text-align: center;
    }

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

    .about-hero,
    .contact-hero,
    .blog-hero {
        padding: 6rem 1rem 2rem;
    }

    .about-hero h1,
    .projects-hero h1,
    .career-hero h1,
    .contact-content h1,
    .blog-content h1 {
        font-size: 2rem;
    }

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

    .projects-hero,
    .career-hero {
        padding: 4rem 0 2rem;
    }

    .section-intro {
        font-size: 1.1rem;
        padding: 0 1rem;
    }

    .project-card {
        padding: 1.5rem;
    }

    .project-links {
        flex-direction: column;
    }

    .timeline::before {
        left: 15px;
    }

    .timeline-item {
        padding-left: 2.5rem;
    }

    .timeline-item::before {
        left: 9px;
    }

    .timeline-content {
        padding: 1.5rem;
    }

    .contact-grid,
    .featured-grid,
    .contact-info-grid {
        grid-template-columns: 1fr;
    }

    .project-card.featured-lead {
        grid-column: auto;
    }

    .article-hero,
    .writeup-hero {
        padding: 6rem 1rem 2rem;
    }

    .article-hero h1,
    .writeup-hero h1 {
        font-size: 1.75rem;
    }

    .contact-form-container,
    .info-card {
        padding: 1.5rem;
    }

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