:root {
    --color-bg: #0a0a0b;
    --color-bg-elevated: #141416;
    --color-bg-hover: #1a1a1d;
    --color-text: #fafafa;
    --color-text-muted: #a1a1aa;
    --color-accent: #f5a623;
    --color-accent-hover: #ffb84d;
    --color-border: #27272a;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --container-max: 1100px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

h1, h2, h3 {
    font-weight: 600;
    line-height: 1.2;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-lg);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

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

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

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.nav-headshot {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-border);
    transition: border-color var(--transition);
}

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

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-menu a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    padding-top: calc(var(--spacing-2xl) + 60px);
}

.hero-content {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-image {
    position: relative;
}

.headshot {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-accent);
    box-shadow: 0 0 40px rgba(245, 166, 35, 0.15);
}

.hero-text h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.hero-tagline {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--color-text-muted);
    max-width: 550px;
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition);
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: var(--color-bg);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--color-bg-hover);
    color: var(--color-text);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.about {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-elevated);
}

.about-content {
    max-width: 700px;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.about-content p:last-child {
    margin-bottom: 0;
}

.experience {
    padding: var(--spacing-2xl) 0;
}

.timeline {
    position: relative;
    padding-left: var(--spacing-lg);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-lg);
}

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

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--spacing-lg) + 2px);
    top: 6px;
    width: 12px;
    height: 12px;
    background: var(--color-accent);
    border-radius: 50%;
    border: 2px solid var(--color-bg);
}

.timeline-content {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: border-color var(--transition);
}

.timeline-content:hover {
    border-color: var(--color-accent);
}

.timeline-header {
    margin-bottom: var(--spacing-sm);
}

.timeline-header h3 {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-xs);
}

.timeline-header .company {
    color: var(--color-accent);
    font-weight: 500;
    display: block;
    margin-bottom: 2px;
}

.timeline-header .date {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

details {
    margin-top: var(--spacing-sm);
}

details summary {
    cursor: pointer;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

details summary::before {
    content: '+';
    color: var(--color-accent);
    font-weight: 600;
    font-size: 1.1rem;
    width: 20px;
}

details[open] summary::before {
    content: '−';
}

details summary::-webkit-details-marker {
    display: none;
}

details ul {
    margin-top: var(--spacing-sm);
    padding-left: var(--spacing-md);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

details li {
    margin-bottom: var(--spacing-xs);
}

details li:last-child {
    margin-bottom: 0;
}

.skills {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-elevated);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.skill-category h3 {
    font-size: 1rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    background: var(--color-bg);
    color: var(--color-text-muted);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

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

.contact {
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.contact-text {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: 1rem;
    transition: color var(--transition);
}

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

.contact-link svg {
    width: 20px;
    height: 20px;
}

.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

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

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-elevated);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .hero-image {
        order: -1;
    }

    .headshot {
        width: 160px;
        height: 160px;
    }

    .hero-tagline {
        margin-left: auto;
        margin-right: auto;
    }

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

    .timeline {
        padding-left: var(--spacing-md);
    }

    .timeline-marker {
        left: calc(-1 * var(--spacing-md) + 2px);
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    * {
        transition: none !important;
    }
}