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

:root {
    --white: #ffffff;
    --black: #101010;
    --ink-900: #141414;
    --ink-700: #3a3a3a;
    --ink-600: #4f4f4f;
    --ink-500: #6f6f6f;
    --ink-400: #9b9b9b;
    --ink-300: #d9d9d9;
    --ink-200: #ebebeb;
    --ink-100: #f6f6f6;
    --max-width: 1180px;
    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'IBM Plex Mono', 'SF Mono', Menlo, Monaco, Consolas, monospace;
    --shadow-sm: 0 1px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 16px 30px rgba(0, 0, 0, 0.05);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 120px;
}

body {
    font-family: var(--font-body);
    color: var(--ink-900);
    line-height: 1.65;
    font-size: 18px;
    background: linear-gradient(180deg, var(--white) 0%, #fafafa 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
    background-image:
        linear-gradient(to right, rgba(0, 0, 0, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 0, 0, 0.02) 1px, transparent 1px);
    background-size: 44px 44px;
    opacity: 0.22;
}

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

a {
    color: inherit;
    text-decoration: none;
}

h1,
h2,
h3,
h4,
h5 {
    font-family: var(--font-display);
    color: var(--ink-900);
    line-height: 1.1;
}

p {
    color: var(--ink-600);
}

.container {
    width: min(var(--max-width), calc(100% - 48px));
    margin-inline: auto;
}

main {
    padding-top: 80px;
}

.section {
    padding: 96px 0;
}

.section-alt {
    background: rgba(0, 0, 0, 0.015);
    border-top: 1px solid var(--ink-200);
    border-bottom: 1px solid var(--ink-200);
}

.section-title {
    font-size: clamp(1.9rem, 3.3vw, 2.7rem);
    letter-spacing: -0.03em;
    margin-bottom: 48px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.section-title::before {
    content: '';
    width: clamp(26px, 4vw, 44px);
    height: 2px;
    background: var(--ink-900);
}

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    border-bottom: 1px solid var(--ink-200);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

.nav .container {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    width: 42px;
    height: 42px;
    border: 1px solid var(--ink-900);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 0.9rem;
    letter-spacing: 0.08em;
    font-weight: 700;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-500);
    padding: 0.25rem 0;
    border-bottom: 1px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--ink-900);
    border-color: var(--ink-900);
}

.hero {
    padding: 80px 0 36px;
}

.hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
    gap: 40px;
    align-items: end;
}

.hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--ink-300);
    border-radius: 999px;
    padding: 6px 14px;
    margin-bottom: 24px;
    color: var(--ink-500);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.hero-title {
    font-size: clamp(3rem, 7vw, 5.6rem);
    letter-spacing: -0.05em;
    margin-bottom: 14px;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.1vw, 1.45rem);
    max-width: 760px;
    color: var(--ink-700);
    letter-spacing: -0.01em;
}

.hero-panel {
    border: 1px solid var(--ink-300);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.86);
    box-shadow: var(--shadow-sm);
    padding: 24px;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.hero-meta span:not(.separator) {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    border: 1px solid var(--ink-300);
    border-radius: 999px;
    padding: 6px 11px;
    color: var(--ink-600);
}

.separator {
    display: none;
}

.hero-panel-copy {
    font-size: 0.96rem;
    line-height: 1.55;
    color: var(--ink-700);
    margin-bottom: 20px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid var(--ink-300);
    border-radius: 999px;
    padding: 10px 18px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    transition: transform 0.2s ease, border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.btn svg {
    width: 14px;
    height: 14px;
}

.btn:hover {
    border-color: var(--ink-900);
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--ink-900);
    color: var(--white);
    border-color: var(--ink-900);
}

.btn-primary:hover {
    background: #000000;
}

.btn-secondary {
    color: var(--ink-700);
    background: rgba(255, 255, 255, 0.72);
}

.about-content {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 28px;
    align-items: start;
}

.lead {
    font-size: clamp(1.15rem, 2vw, 1.4rem);
    line-height: 1.6;
    color: var(--ink-900);
    letter-spacing: -0.01em;
}

#projects .container {
    counter-reset: featured;
}

.project-featured {
    counter-increment: featured;
    position: relative;
    margin-bottom: 28px;
    padding: clamp(22px, 3.6vw, 46px);
    border: 1px solid var(--ink-300);
    border-radius: var(--radius-lg);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(249, 249, 249, 0.94) 100%);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.project-featured::after {
    content: counter(featured, decimal-leading-zero);
    position: absolute;
    top: 24px;
    right: 24px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.2em;
    color: var(--ink-400);
}

.project-featured h3 {
    font-size: clamp(1.5rem, 3vw, 2.35rem);
    letter-spacing: -0.03em;
    margin: 2px 0 16px;
    max-width: 21ch;
}

.project-subtitle {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-500);
    margin-bottom: 20px;
}

.project-badge {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--ink-900);
    border-radius: 999px;
    padding: 6px 12px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.project-lead {
    font-size: 1.05rem;
    line-height: 1.68;
    color: var(--ink-700);
    margin-bottom: 26px;
    max-width: 72ch;
}

.metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 26px;
}

.metric-item {
    border: 1px solid var(--ink-300);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.9);
    padding: 14px;
}

.metric-item .metric-value {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(1.45rem, 2vw, 1.95rem);
    letter-spacing: -0.03em;
    margin-bottom: 4px;
    color: var(--ink-900);
}

.metric-item .metric-label {
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-500);
}

.project-details {
    border-top: 1px solid var(--ink-200);
    padding-top: 22px;
}

.project-details h5 {
    margin: 24px 0 8px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-500);
}

.project-details h5:first-child {
    margin-top: 0;
}

.project-details p {
    max-width: 80ch;
    font-size: 0.98rem;
    line-height: 1.7;
    color: var(--ink-700);
    margin-bottom: 14px;
}

.pipeline-steps {
    list-style: none;
    margin: 10px 0;
    padding: 0;
    counter-reset: step;
}

.pipeline-steps li {
    counter-increment: step;
    border: 1px solid var(--ink-300);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.8);
    padding: 14px 14px 14px 52px;
    margin-bottom: 10px;
    position: relative;
    font-size: 0.95rem;
    color: var(--ink-700);
    line-height: 1.65;
}

.pipeline-steps li::before {
    content: counter(step);
    position: absolute;
    left: 14px;
    top: 13px;
    width: 26px;
    height: 26px;
    border: 1px solid var(--ink-300);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--ink-500);
}

.system-specs {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 8px;
}

.system-specs li {
    border: 1px solid var(--ink-200);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.9);
    padding: 10px 12px 10px 28px;
    font-size: 0.94rem;
    color: var(--ink-700);
    line-height: 1.58;
    position: relative;
}

.system-specs li::before {
    content: '•';
    position: absolute;
    left: 12px;
    top: 9px;
    color: var(--ink-500);
}

.tech-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
}

.tech-list li {
    border: 1px solid var(--ink-300);
    border-radius: 999px;
    padding: 5px 10px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-600);
    background: rgba(255, 255, 255, 0.88);
}

.project-meta {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--ink-200);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--ink-500);
}

.project-links {
    display: flex;
    gap: 18px;
    margin-top: 20px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-700);
    border-bottom: 1px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.project-link:hover {
    color: var(--ink-900);
    border-color: var(--ink-900);
}

.project-link svg {
    width: 13px;
    height: 13px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.project-card {
    border: 1px solid var(--ink-300);
    border-radius: var(--radius-md);
    padding: 24px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: var(--shadow-sm);
}

.project-card h4 {
    font-size: 1.3rem;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.project-card p {
    font-size: 0.95rem;
    color: var(--ink-700);
    margin-bottom: 16px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.skill-category {
    border: 1px solid var(--ink-300);
    border-radius: var(--radius-md);
    padding: 18px;
    background: rgba(255, 255, 255, 0.82);
}

.skill-category h4 {
    font-size: 1.12rem;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
}

.skill-category p {
    font-size: 0.97rem;
    line-height: 1.62;
    color: var(--ink-700);
}

.achievements-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.achievement-item {
    border: 1px solid var(--ink-300);
    border-radius: var(--radius-md);
    padding: 16px;
    background: rgba(255, 255, 255, 0.88);
    color: var(--ink-700);
    font-size: 0.96rem;
    line-height: 1.58;
}

.contact-content {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
}

.contact-text {
    font-size: clamp(1.1rem, 2vw, 1.45rem);
    color: var(--ink-700);
    margin-bottom: 28px;
}

.contact-links {
    display: flex;
    justify-content: center;
    margin-bottom: 18px;
}

.contact-link {
    width: min(560px, 100%);
    display: flex;
    align-items: center;
    gap: 16px;
    border: 1px solid var(--ink-300);
    border-radius: var(--radius-lg);
    padding: 18px;
    background: rgba(255, 255, 255, 0.9);
    text-align: left;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.contact-link:hover {
    transform: translateY(-1px);
    border-color: var(--ink-900);
}

.contact-link-title {
    font-size: 1rem;
    color: var(--ink-900);
    margin-bottom: 3px;
}

.contact-link-subtitle {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-500);
}

.contact-location {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-500);
}

.contact-location svg {
    width: 13px;
    height: 13px;
}

.footer {
    border-top: 1px solid var(--ink-200);
    padding: 34px 0 44px;
    background: rgba(255, 255, 255, 0.7);
}

.footer p {
    font-family: var(--font-mono);
    font-size: 0.64rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-500);
    text-align: center;
}

.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.65s ease, transform 0.65s ease;
    transition-delay: var(--reveal-delay, 0ms);
}

.reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1080px) {
    .hero-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .hero-panel {
        max-width: 640px;
    }

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

    .projects-grid,
    .skills-grid,
    .achievements-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    body {
        font-size: 16px;
    }

    .container {
        width: min(var(--max-width), calc(100% - 30px));
    }

    main {
        padding-top: 74px;
    }

    .nav .container {
        height: 72px;
    }

    .nav-links {
        display: none;
    }

    .section {
        padding: 68px 0;
    }

    .hero {
        padding-top: 54px;
    }

    .hero-title {
        font-size: clamp(2.35rem, 13vw, 3.1rem);
    }

    .hero-panel {
        padding: 18px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

    .project-featured {
        padding: 20px;
    }

    .project-featured::after {
        top: 12px;
        right: 12px;
    }

    .project-featured h3 {
        max-width: none;
        padding-right: 44px;
    }

    .project-links {
        flex-direction: column;
        gap: 10px;
    }

    .contact-link {
        padding: 14px;
    }
}

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

    .btn,
    .contact-link,
    .project-link,
    .nav-links a,
    .reveal {
        transition: none !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}