:root {
    --bg-color: #FDFDFD;
    --text-primary: #111111;
    --text-secondary: #6E6E73;
    --surface-color: #F5F5F7;
    --surface-hover: #EBEBEF;
    --border-color: #E5E5EA;
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-editorial: 'Newsreader', serif;
    --nav-bg: rgba(253, 253, 253, 0.8);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #000000;
        --text-primary: #F5F5F7;
        --text-secondary: #86868B;
        --surface-color: #161617;
        --surface-hover: #1D1D1F;
        --border-color: #262628;
        --nav-bg: rgba(0, 0, 0, 0.8);
    }
}

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

html {
    scroll-behavior: smooth;
}

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

*:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

strong {
    font-weight: 600;
    color: var(--text-primary);
}

em {
    font-family: var(--font-editorial);
    font-style: italic;
    font-weight: 400;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.serif {
    font-family: var(--font-editorial);
}

.fixed-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    opacity: 0;
    transform: translateY(-100%);
    pointer-events: none;
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.fixed-nav.nav-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.fixed-nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.nav-logo-img {
    height: 28px;
    width: 28px;
    border-radius: 50%;
    object-fit: cover;
}

.fixed-nav-links {
    display: flex;
    gap: 2rem;
}

.fixed-nav-item {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    font-weight: 400;
}

.fixed-nav-item:hover {
    color: var(--text-primary);
}

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-layout {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4rem;
    width: 100%;
    align-items: center;
    animation: fadeIn 1.2s ease-out forwards;
}

.hero-left {
    max-width: 850px;
}

.hero-logo {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    background-color: var(--surface-color);
}

.hero-badge {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-family: var(--font-editorial);
    font-size: clamp(2.8rem, 6vw, 5.2rem);
    line-height: 1.05;
    font-weight: 500;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 600px;
    font-weight: 300;
}

.hero-nav-right {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    text-align: right;
    border-left: 1px solid var(--border-color);
    padding-left: 3.5rem;
}

.nav-btn {
    text-decoration: none;
    font-size: clamp(1.6rem, 3vw, 2.5rem);
    font-family: var(--font-editorial);
    color: var(--text-secondary);
    transition: color 0.3s ease, transform 0.3s ease;
    display: block;
    font-weight: 400;
}

.nav-btn:hover {
    color: var(--text-primary);
    transform: translateX(-10px);
}

.section {
    padding: 7rem 5%;
    max-width: 1100px;
    margin: 0 auto;
}

.section-title {
    font-family: var(--font-editorial);
    font-size: clamp(2rem, 3.5vw, 3rem);
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: 3.5rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.2rem;
}

.btn {
    text-decoration: none;
    padding: 0.85rem 1.6rem;
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.25s ease;
    display: inline-block;
}

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

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

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: start;
}

.serif-lead {
    font-family: var(--font-editorial);
    font-size: 1.8rem;
    line-height: 1.3;
    color: var(--text-primary);
    font-style: italic;
    font-weight: 400;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-weight: 300;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--surface-color);
    padding: 2.2rem;
    border-radius: 1.25rem;
    display: flex;
    flex-direction: column;
    border: 1px solid transparent;
    transition: transform 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-4px);
    background-color: var(--surface-hover);
    border-color: var(--border-color);
}

.project-title {
    font-family: var(--font-editorial);
    font-size: 1.6rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    font-weight: 300;
}

.project-tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
}

.project-tech-list span {
    font-size: 0.8rem;
    color: var(--text-primary);
    background-color: var(--bg-color);
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    font-weight: 400;
}

.stack-categories {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.stack-category {
    background-color: var(--surface-color);
    padding: 2.2rem;
    border-radius: 1.25rem;
    border: 1px solid var(--border-color);
}

.stack-category-title {
    font-family: var(--font-editorial);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 1.2rem;
}

.stack-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.stack-pill {
    background-color: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.6rem 1.2rem;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 500;
}

.github-container {
    background-color: var(--surface-color);
    padding: 3.5rem;
    border-radius: 1.5rem;
}

.github-bio {
    font-family: var(--font-editorial);
    font-size: clamp(1.3rem, 2.5vw, 1.75rem);
    color: var(--text-primary);
    margin-bottom: 3rem;
    font-style: italic;
    line-height: 1.4;
    max-width: 900px;
    font-weight: 400;
}

.github-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 300;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.6rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.contact-card {
    background-color: var(--surface-color);
    padding: 4rem 3.5rem;
    border-radius: 1.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.contact-heading {
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-weight: 400;
}

.contact-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 500px;
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.contact-links {
    display: flex;
    gap: 1.5rem;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.4rem;
    border-radius: 999px;
    font-size: 0.95rem;
    transition: all 0.25s ease;
    background-color: var(--bg-color);
    font-weight: 500;
}

.contact-link:hover {
    border-color: var(--text-primary);
    transform: translateY(-2px);
}

.footer {
    padding: 4rem 5%;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 900px) {
    .hero-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
        padding-top: 4rem;
        padding-bottom: 4rem;
    }

    .hero-nav-right {
        text-align: left;
        border-left: none;
        border-top: 1px solid var(--border-color);
        padding-left: 0;
        padding-top: 2.5rem;
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: space-between;
        align-items: center;
        gap: 1rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.5rem; 
        width: 100%;
    }

    .nav-btn {
        font-size: clamp(1.1rem, 3vw, 1.5rem);
        white-space: nowrap;
    }

    .nav-btn:hover {
        transform: translateY(-3px);
    }
}

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

    .hero-nav-right {
        gap: 0.5rem;
    }
    
    .nav-btn {
        font-size: clamp(0.9rem, 3.5vw, 1.1rem);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .github-container, .contact-card {
        padding: 2.5rem 1.5rem;
    }

    .contact-links {
        flex-direction: column;
        width: 100%;
    }

    .contact-link {
        justify-content: center;
        width: 100%;
    }
}

.project-link {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}