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

:root {
    --primary: #0f172a;
    --secondary: #1e293b;
    --accent: #3b82f6;
    --accent-dark: #2563eb;
    --text: #334155;
    --text-light: #64748b;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --border: #e2e8f0;
    --radius: 8px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Hero */
.hero {
    padding: 160px 24px 100px;
    max-width: 1100px;
    margin: 0 auto;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-text {
    flex: 1;
}

.hero-greeting {
    font-size: 1rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 8px;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 12px;
}

.hero h2 {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-light);
    max-width: 520px;
    margin-bottom: 32px;
}

.hero-image {
    flex-shrink: 0;
}

.hero-image img {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--border);
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-1px);
}

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

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

/* Sections */
.section {
    padding: 80px 0;
}

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

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 48px;
    letter-spacing: -0.5px;
}

/* About */
.about-content p {
    font-size: 1.05rem;
    color: var(--text);
    margin-bottom: 16px;
    max-width: 720px;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 32px;
    border-left: 2px solid var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -39px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid white;
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 8px;
}

.timeline-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 4px;
}

.timeline-company {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 12px;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
}

.timeline-content li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 0.95rem;
    color: var(--text);
}

.timeline-content li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-light);
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.skill-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: border-color 0.2s;
}

.skill-card:hover {
    border-color: var(--accent);
}

.skill-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: var(--bg-alt);
    color: var(--text);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border);
}

/* Certifications */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.cert-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    transition: transform 0.2s, border-color 0.2s;
}

.cert-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.cert-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 16px;
}

.cert-card h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}

.cert-card p {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* Certifications - Credly Embeds */
.credly-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    margin-bottom: 48px;
}

.subsection-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 24px;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.cert-card-link {
    text-decoration: none;
}

.cert-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    transition: transform 0.2s, border-color 0.2s;
    height: 100%;
}

.cert-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.cert-provider {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent);
    margin-bottom: 8px;
}

.cert-img {
    width: 100px;
    height: 100px;
    object-fit: contain;
    margin-bottom: 12px;
}

.cert-card h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}

.cert-card p {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* Education */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.edu-card {
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.edu-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 4px;
}

.edu-img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-bottom: 12px;
}

.edu-field {
    font-size: 0.9rem;
    color: var(--text);
    margin-bottom: 8px;
}

.edu-school {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 4px;
}

.edu-date {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 500;
}

/* Contact */
.contact-text {
    font-size: 1.05rem;
    color: var(--text-light);
    margin-bottom: 32px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 480px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    padding: 16px 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    transition: border-color 0.2s;
}

.contact-item:hover {
    border-color: var(--accent);
}

.contact-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

/* Footer */
.footer {
    padding: 32px 24px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-light);
    border-top: 1px solid var(--border);
}

/* Awards */
.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.award-card {
    text-align: center;
    padding: 32px 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.2s;
}

.award-card:hover {
    border-color: var(--accent);
}

.award-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 12px;
}

.award-icon {
    font-size: 2rem;
    color: #f59e0b;
    margin-bottom: 12px;
}

.award-card h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}

.award-card p {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero {
        padding: 120px 24px 60px;
    }

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

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-image img {
        width: 200px;
        height: 200px;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-description {
        margin: 0 auto 32px;
    }

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