:root {
    --color-bg: #0a0a0b;
    --color-bg-elevated: #111113;
    --color-bg-card: #18181b;
    --color-bg-hover: #1f1f23;
    --color-border: #27272a;
    --color-border-hover: #3f3f46;
    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-accent: #3b82f6;
    --color-accent-hover: #60a5fa;
    --color-accent-glow: rgba(59, 130, 246, 0.15);
    --color-success: #22c55e;
    --color-aws: #ff9900;
    --color-azure: #0078d4;
    --color-zerto: #00a1e0;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --shadow-glow: 0 0 60px rgba(59, 130, 246, 0.1);
    --radius: 8px;
    --radius-lg: 16px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--color-accent);
    color: white;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-accent);
    color: white;
    padding: 8px 16px;
    z-index: 1000;
    transition: top var(--transition);
}

.skip-link:focus {
    top: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: color var(--transition);
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-menu a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition);
}

.nav-menu a:hover,
.nav-menu a:focus {
    color: var(--color-text);
}

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

.nav-cta {
    background: var(--color-accent) !important;
    color: white !important;
    padding: 10px 20px !important;
    border-radius: var(--radius);
    transition: all var(--transition) !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--color-accent-hover) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

.hero {
    padding: 180px 0 120px;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('images/hero-bg.jpg') center/cover no-repeat;
    opacity: 0.15;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
    padding: 8px 16px;
    background: var(--color-accent-glow);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 100px;
}

.hero h1 {
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 28px;
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 64px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius);
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

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

.btn-secondary:hover {
    border-color: var(--color-text-secondary);
    background: var(--color-bg-card);
}

.btn-icon {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    flex-shrink: 0;
}

.hero-stats {
    display: flex;
    gap: 64px;
}

.stat {
    display: flex;
    flex-direction: column;
    position: relative;
}

.stat::after {
    content: '';
    position: absolute;
    right: -32px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

.stat:last-child::after {
    display: none;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

section {
    padding: 120px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 64px;
}

.about {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('images/about-bg.jpg') center/cover no-repeat;
    opacity: 0.05;
    pointer-events: none;
}

.about .container {
    position: relative;
    z-index: 1;
}

.about-content {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 48px;
    align-items: start;
}

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

.profile-picture {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-bg-card);
    border: 3px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
}

.profile-picture img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-initials {
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-accent);
    background: var(--color-accent-glow);
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-text .lead {
    font-size: 1.375rem;
    color: var(--color-text);
    font-weight: 500;
    margin-bottom: 28px;
    line-height: 1.6;
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    font-size: 1.0625rem;
}

.about-highlights {
    margin-top: 40px;
}

.highlight {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    color: var(--color-text);
    font-weight: 500;
    border-bottom: 1px solid var(--color-border);
}

.highlight:last-child {
    border-bottom: none;
}

.highlight-icon {
    width: 24px;
    height: 24px;
    color: var(--color-success);
    flex-shrink: 0;
}

.about-values {
    background: var(--color-bg-card);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    grid-column: 1 / -1;
    margin-top: 20px;
}

.about-values h3 {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: 28px;
    font-weight: 600;
}

.values-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.values-list li {
    padding: 0;
    border-bottom: none;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.values-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.values-list strong {
    color: var(--color-text);
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
}

.skills {
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.skill-card {
    background: var(--color-bg-card);
    padding: 36px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.skill-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.skill-icon {
    width: 56px;
    height: 56px;
    background: var(--color-accent-glow);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.skill-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

.skill-card h3 {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: 20px;
    font-weight: 600;
}

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

.skill-list li {
    padding: 10px 0;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    border-bottom: 1px solid var(--color-border);
}

.skill-list li:last-child {
    border-bottom: none;
}

.experience {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.experience-timeline {
    position: relative;
    max-width: 900px;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

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

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -6px;
    top: 6px;
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border-radius: 50%;
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.timeline-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition);
}

.timeline-content:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-glow);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.timeline-header h3 {
    font-size: 1.375rem;
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-header .company {
    font-size: 1rem;
    color: var(--color-accent);
    font-weight: 500;
}

.timeline-date {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    background: var(--color-bg-elevated);
    padding: 6px 12px;
    border-radius: var(--radius);
    white-space: nowrap;
}

.timeline-details {
    list-style: none;
}

.timeline-details li {
    position: relative;
    padding-left: 20px;
    padding-bottom: 12px;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.timeline-details li:last-child {
    padding-bottom: 0;
}

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

.certifications {
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
}

.certs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 80px;
}

.cert-card {
    background: var(--color-bg-card);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

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

.cert-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 0.875rem;
    color: white;
    margin-bottom: 20px;
}

.cert-badge.aws {
    background: linear-gradient(135deg, var(--color-aws) 0%, #cc7a00 100%);
}

.cert-badge.azure {
    background: linear-gradient(135deg, var(--color-azure) 0%, #005a9e 100%);
}

.cert-badge.zerto {
    background: linear-gradient(135deg, var(--color-zerto) 0%, #0077a8 100%);
}

.cert-card h3 {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 10px;
    line-height: 1.4;
    font-weight: 600;
}

.cert-issuer {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: 6px;
}

.cert-date {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

.education {
    padding-top: 48px;
    border-top: 1px solid var(--color-border);
}

.education-title {
    font-size: 1.75rem;
    color: var(--color-text);
    margin-bottom: 40px;
    font-weight: 600;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.education-card {
    background: var(--color-bg-card);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.education-card h4 {
    font-size: 1.125rem;
    color: var(--color-text);
    margin-bottom: 10px;
    font-weight: 600;
}

.edu-field {
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: 12px;
}

.edu-school {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    margin-bottom: 6px;
}

.edu-date {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

.contact {
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.contact-card {
    background: var(--color-bg-card);
    padding: 36px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all var(--transition);
}

.contact-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.contact-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin: 0 auto 20px;
}

.contact-card h3 {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 10px;
    font-weight: 600;
}

.contact-card a,
.contact-card p {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    word-break: break-word;
    transition: color var(--transition);
}

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

.contact-cta {
    text-align: center;
    padding: 48px;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.contact-cta p {
    color: var(--color-text-secondary);
    font-size: 1.25rem;
}

.footer {
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
    padding: 48px 0;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.footer-copyright {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-nav {
    display: flex;
    gap: 28px;
}

.footer-nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition);
}

.footer-nav a:hover {
    color: var(--color-text);
}

@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-bg-elevated);
        flex-direction: column;
        padding: 32px 24px;
        gap: 24px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a::after {
        display: none;
    }
    
    .hero {
        padding: 140px 0 100px;
    }
    
    .hero::before {
        width: 400px;
        height: 400px;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 32px;
    }
    
    .stat::after {
        display: none;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    section {
        padding: 80px 0;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .profile-picture {
        width: 150px;
        height: 150px;
    }

    .profile-initials {
        font-size: 3rem;
    }

    .values-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

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

    .timeline-item {
        padding-left: 32px;
    }

    .timeline-content {
        padding: 24px;
    }

    .timeline-header {
        flex-direction: column;
        gap: 12px;
    }

    .education-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

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

    .stat {
        text-align: center;
        min-width: 100px;
    }

    .values-list {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}