:root {
    --color-bg: #0d1117;
    --color-bg-secondary: #161b22;
    --color-bg-tertiary: #21262d;
    --color-border: #30363d;
    --color-text: #e6edf3;
    --color-text-secondary: #8b949e;
    --color-text-muted: #6e7681;
    --color-accent: #3fb950;
    --color-accent-hover: #56d364;
    --color-accent-muted: rgba(63, 185, 80, 0.15);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    --max-width: 1100px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Skip Link for Keyboard Navigation */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: var(--color-bg);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 0 0 8px 8px;
    font-weight: 600;
    z-index: 1000;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0;
    outline: none;
}

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

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

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

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

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

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

.nav-links a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, var(--color-accent-muted), transparent),
        var(--color-bg);
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.hero-name {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero-tagline {
    font-size: clamp(1.1rem, 2.5vw, 1.35rem);
    color: var(--color-text-secondary);
    max-width: 600px;
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
}

.hero-subtagline {
    font-size: clamp(1rem, 2vw, 1.1rem);
    color: var(--color-text-muted);
    max-width: 650px;
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.hero-separator {
    color: var(--color-border);
}

.hero-link {
    color: var(--color-text-secondary);
}

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

/* Section Styles */
section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
}

.section-title::before {
    content: "";
    display: inline-block;
    width: 3px;
    height: 1.2em;
    background: var(--color-accent);
    margin-right: var(--spacing-sm);
    vertical-align: middle;
    border-radius: 2px;
}

/* About Section */
.about {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.about-content {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-photo {
    position: sticky;
    top: calc(60px + var(--spacing-lg));
}

.photo-placeholder {
    width: 200px;
    height: 200px;
    background: var(--color-bg-tertiary);
    border: 2px dashed var(--color-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.about-text p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
}

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

.about-credential {
    color: var(--color-text-muted) !important;
    font-size: 0.95rem !important;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-lg) !important;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.project-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: border-color 0.2s ease, transform 0.2s ease;
}

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

.project-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.project-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text);
}

.project-badge {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.2em 0.6em;
    background: var(--color-accent-muted);
    color: var(--color-accent);
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-alt {
    background: var(--color-bg-tertiary);
    color: var(--color-text-muted);
}

.project-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.project-links {
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

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

.icon {
    width: 1em;
    height: 1em;
}

/* Services Section */
.services {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.services-intro {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.service-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: border-color 0.2s ease;
}

.service-card:hover {
    border-color: var(--color-text-muted);
}

.service-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-accent);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.service-description {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.services-cta {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
}

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

.contact .section-title {
    display: inline-block;
}

.contact-content {
    max-width: 500px;
    margin: 0 auto;
}

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

.contact-email {
    display: inline-block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-accent);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--color-accent);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    transition: background-color 0.2s ease, color 0.2s ease;
}

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

.contact-intake {
    list-style: none;
    text-align: left;
    max-width: 320px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.contact-intake li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.2em;
    position: relative;
}

.contact-intake li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--color-border);
}

.contact-location {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-md);
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-photo {
        position: static;
        justify-self: center;
    }

    .about-text {
        text-align: left;
    }

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

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

@media (max-width: 480px) {
    .nav-links {
        gap: var(--spacing-sm);
        font-size: 0.85rem;
    }

    .hero-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .hero-separator {
        display: none;
    }

    .contact-email {
        font-size: 1.1rem;
        padding: var(--spacing-sm);
    }
}