:root {
    --text-primary: #111111;
    --text-inverse: #f5f5f5;
    --surface-page: #f2f2f0;
    --surface-raised: #ffffff;
    --surface-cool: #e5e5e2;
    --surface-warm: #d6d6d2;
    --surface-inverse: #111111;
    --border-primary: #161616;
    --header-bg: rgba(242, 242, 240, 0.94);
    --nav-cta-bg: #111111;
    --nav-cta-text: #f5f5f5;
    --accent-primary: #17324d;
    --accent-text: #17324d;
    --accent-shadow: #294d70;
    --accent-soft: #c9d8e6;
    --surface-accent: #17324d;
    --text-on-accent: #f5f5f5;
    --muted: #5f5f5f;
    --focus-ring: #17324d;
    --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    --sans: Inter, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text-primary); background: var(--surface-page); font-family: var(--sans); line-height: 1.45; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.shell { width: min(1440px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 100; padding: 12px 16px; color: var(--text-inverse); background: var(--surface-inverse); }
.skip-link:focus { top: 16px; }
.scroll-progress { position: fixed; inset: 0 0 auto; z-index: 80; height: 4px; pointer-events: none; }
.scroll-progress span { width: 100%; height: 100%; display: block; background: var(--accent-primary); transform: scaleX(0); transform-origin: left; will-change: transform; }
section[id] { scroll-margin-top: 78px; }

.site-header { position: sticky; top: 0; z-index: 50; background: var(--header-bg); border-bottom: 1px solid var(--border-primary); backdrop-filter: blur(12px); }
.nav { min-height: 78px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 32px; }
.brand { display: flex; align-items: center; gap: 12px; width: fit-content; font-size: .82rem; font-weight: 900; letter-spacing: -.02em; }
.nav-links { display: flex; align-items: center; justify-content: center; gap: 34px; font-family: var(--mono); font-size: .72rem; text-transform: uppercase; }
.nav-links a { position: relative; padding-block: 8px; border-bottom: 1px solid transparent; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--accent-text); border-color: var(--accent-primary); }
.nav-links a.is-active::before { content: "■"; position: absolute; left: 50%; bottom: -9px; color: var(--accent-primary); font-size: .46rem; transform: translateX(-50%); }
.nav-actions { justify-self: end; display: flex; align-items: center; gap: 9px; }
.theme-toggle { min-width: 44px; min-height: 44px; padding: 8px 11px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; color: inherit; background: transparent; border: 1px solid var(--surface-inverse); border-radius: 0; font: .7rem var(--mono); text-transform: uppercase; cursor: pointer; }
.theme-icon { width: 20px; height: 20px; display: grid; place-items: center; font: 1.3rem/1 var(--sans); }
.theme-icon > span { grid-area: 1 / 1; }
.theme-icon-sun { display: none; }
.theme-toggle:hover .theme-icon, .theme-toggle:focus-visible .theme-icon { color: var(--accent-text); }
.nav-contact { justify-self: end; padding: 11px 15px; color: var(--nav-cta-text); background: var(--nav-cta-bg); font-family: var(--mono); font-size: .72rem; text-transform: uppercase; }

.hero { border-bottom: 1px solid var(--border-primary); }
.hero-grid { min-height: calc(100vh - 78px); display: grid; grid-template-columns: minmax(0, 1.42fr) minmax(340px, .58fr); border-inline: 1px solid var(--border-primary); }
.hero-copy { padding: clamp(76px, 9vw, 140px) clamp(32px, 6vw, 92px); display: flex; flex-direction: column; justify-content: center; border-right: 1px solid var(--border-primary); }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 1050px; margin-bottom: 36px; font-size: clamp(4.2rem, 8.3vw, 9rem); font-weight: 750; line-height: .84; letter-spacing: -.075em; }
h1 span { color: var(--accent-text); }
h2 { margin-bottom: 24px; font-size: clamp(3rem, 6vw, 6.6rem); font-weight: 720; line-height: .9; letter-spacing: -.065em; }
h3 { font-size: clamp(1.65rem, 2.8vw, 3rem); line-height: .96; letter-spacing: -.05em; }
.hero-intro { max-width: 710px; margin-bottom: 0; font-size: clamp(1.05rem, 1.55vw, 1.35rem); line-height: 1.4; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 50px; padding: 13px 18px; display: inline-flex; align-items: center; justify-content: space-between; gap: 40px; border: 1px solid var(--surface-inverse); font-family: var(--mono); font-size: .74rem; font-weight: 700; text-transform: uppercase; transition: transform 140ms ease, box-shadow 140ms ease, color 140ms ease, background-color 140ms ease, border-color 140ms ease; }
.button:hover, .button:focus-visible { transform: translate(-3px, -3px); box-shadow: 4px 4px 0 var(--surface-inverse); }
.hero-visual { position: relative; min-height: 620px; overflow: hidden; display: flex; align-items: center; justify-content: center; background: var(--surface-cool); }
.portrait-wrap { position: relative; z-index: 2; width: min(76%, 430px); aspect-ratio: 4 / 5; overflow: hidden; border: 1px solid var(--surface-inverse); box-shadow: 20px 20px 0 var(--accent-shadow); filter: saturate(.82) contrast(1.06); }
.portrait-wrap img { width: 100%; height: 100%; object-fit: cover; }
.portrait-wrap { will-change: transform; }
.hero-visual:hover .portrait-wrap { transform: translate(-5px, -5px); box-shadow: 28px 28px 0 var(--accent-shadow); }
.portrait-wrap { transition: transform 280ms ease, box-shadow 280ms ease; }

.section { padding-block: clamp(90px, 10vw, 150px); border-bottom: 1px solid var(--border-primary); }
.section-head { max-width: 950px; margin-bottom: clamp(46px, 6vw, 80px); }
.section-title { font-size: clamp(2.35rem, 4.4vw, 4.75rem); line-height: .95; letter-spacing: -.045em; }
.section-head .section-title { margin-bottom: 0; }
.date, .company, .project-top, .tags { font-family: var(--mono); text-transform: uppercase; }
.experience { background: var(--surface-raised); }
.experience-list { border-top: 1px solid var(--border-primary); }
.experience-row { display: grid; grid-template-columns: minmax(500px, 1.25fr) minmax(240px, .75fr); align-items: start; gap: clamp(32px, 5vw, 80px); padding-block: 58px; border-bottom: 1px solid var(--border-primary); }
.experience-row.featured { position: relative; }
.experience-row.featured::before { content: "CURRENT"; position: absolute; top: 0; right: 0; padding: 7px 10px; color: var(--text-primary); background: var(--surface-warm); font: 700 .62rem var(--mono); }
.role-head { display: grid; grid-template-columns: 150px 1fr; gap: 20px; }
.role-head h3 { margin-bottom: 12px; font-size: clamp(1.65rem, 2.5vw, 2.8rem); }
.date { padding-top: 7px; font-size: .66rem; }
.company { margin: 0; color: var(--accent-text); font-size: .72rem; font-weight: 800; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; font-size: .62rem; }
.tags span { padding: 7px 9px; border: 1px solid var(--border-primary); background: var(--surface-page); }

.projects { background: var(--surface-page); }
.project-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border: 1px solid var(--border-primary); }
.project-card { display: flex; flex-direction: column; border-right: 1px solid var(--border-primary); }
.project-card:last-child { border-right: 0; }
.project-card:first-child { background: var(--surface-warm); }
.project-card:last-child { background: var(--surface-cool); }
.project-top { min-height: 48px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--border-primary); font-size: .65rem; }
.project-content { flex: 1; padding: clamp(30px, 5vw, 60px); display: flex; flex-direction: column; background: var(--surface-raised); }
.project-content h3 { margin-bottom: 25px; font-size: clamp(2.1rem, 3.3vw, 3.7rem); }
.project-content > p { max-width: 580px; }
.project-actions { margin-top: auto; padding-top: 36px; }
.project-link { display: inline-flex; align-items: center; gap: 54px; padding-bottom: 7px; border-bottom: 1px solid var(--border-primary); font: 700 .72rem var(--mono); text-transform: uppercase; }
.project-link:hover, .project-link:focus-visible { color: var(--accent-text); border-color: var(--accent-primary); }
.project-note { color: var(--muted); font: 700 .68rem var(--mono); letter-spacing: .04em; text-transform: uppercase; }

.skills { color: var(--text-inverse); background: var(--surface-inverse); }
.skills-grid { display: grid; grid-template-columns: .55fr 1.45fr; gap: clamp(40px, 7vw, 96px); }
.skills .section-title { color: var(--accent-soft); }
.sticky-head { position: sticky; top: 125px; height: fit-content; margin-bottom: 0; }
.skill-stack { border-top: 1px solid #454545; }
.skill-stack article { min-height: 100px; padding: 22px 0; display: grid; grid-template-columns: 120px 1fr; column-gap: 16px; align-items: start; border-bottom: 1px solid #454545; }
.skill-category { margin: 0; color: var(--accent-soft); font: 700 .65rem/1.5 var(--mono); letter-spacing: 0; text-transform: uppercase; }
.toolkit-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.toolkit-tags span { padding: 8px 10px; color: var(--text-inverse); background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .42); font: 700 .68rem/1.2 var(--mono); text-transform: uppercase; }

.education { padding-block: clamp(90px, 10vw, 150px); background: var(--surface-cool); border-bottom: 1px solid var(--border-primary); }
.education-grid { display: grid; row-gap: clamp(46px, 6vw, 80px); }
.education-grid .section-title { margin-bottom: 0; }
.education-list { border-top: 1px solid var(--border-primary); }
.education-record { padding-block: 38px; display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 40px; align-items: start; border-bottom: 1px solid var(--border-primary); }
.education-grid h3 { margin: 0 0 8px; font-size: clamp(1.45rem, 2vw, 2.35rem); }
.education-grid p { margin-bottom: 0; }
.education-date { font: .7rem/1.7 var(--mono); text-transform: uppercase; }

.contact { position: relative; overflow: hidden; padding-block: clamp(100px, 13vw, 190px); color: var(--text-on-accent); background: var(--surface-accent); }
.contact-inner { position: relative; z-index: 2; text-align: center; }
.contact-inner .section-title { margin-bottom: 40px; }
.contact-actions { justify-content: center; }
.button-outline-dark { background: transparent; border-color: currentColor; }
.contact .button.button-outline-dark:hover, .contact .button.button-outline-dark:focus-visible { color: var(--text-on-accent); background: transparent; border-color: var(--text-on-accent); box-shadow: 6px 6px 0 #050505; transform: translate(-4px, -4px); }
.contact :focus-visible { outline-color: var(--text-on-accent); }
.contact-pixels { position: absolute; inset: -120px 0 0; opacity: .2; background-image: linear-gradient(var(--text-on-accent) 1px, transparent 1px), linear-gradient(90deg, var(--text-on-accent) 1px, transparent 1px); background-position: 0 var(--grid-shift, 0); background-size: 56px 56px; mask-image: linear-gradient(to bottom, #000, transparent 80%); will-change: background-position; }

footer { color: var(--text-inverse); background: var(--surface-inverse); }
.footer-inner { min-height: 88px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 20px; font: .65rem var(--mono); text-transform: uppercase; }
.footer-inner p { margin: 0; }
.footer-inner a { justify-self: end; }
.footer-inner a:hover, .footer-inner a:focus-visible { color: var(--accent-soft); }

:focus-visible { outline: 3px solid var(--focus-ring); outline-offset: 4px; }

html[data-theme="dark"] {
    --text-primary: #f2f2f2;
    --surface-page: #111111;
    --surface-raised: #1b1b1b;
    --surface-cool: #242424;
    --surface-warm: #303030;
    --surface-inverse: #050505;
    --border-primary: rgba(242, 242, 242, .48);
    --header-bg: rgba(17, 17, 17, .94);
    --nav-cta-bg: #f2f2f2;
    --nav-cta-text: #111111;
    --accent-primary: #8fb4d8;
    --accent-text: #8fb4d8;
    --accent-shadow: #4d7195;
    --accent-soft: #8fb4d8;
    --surface-accent: #1b3854;
    --text-on-accent: #f5f5f5;
    --muted: #b0b0b0;
    --focus-ring: #8fb4d8;
}

html[data-theme="dark"] .nav-links a:hover,
html[data-theme="dark"] .nav-links a:focus-visible { border-color: var(--accent-primary); }
html[data-theme="dark"] .theme-toggle { border-color: var(--text-primary); }
html[data-theme="dark"] .nav-links { border-color: var(--border-primary); }
html[data-theme="dark"] .theme-icon-moon { display: none; }
html[data-theme="dark"] .theme-icon-sun { display: block; color: var(--text-primary); }
html[data-theme="dark"] .button:hover,
html[data-theme="dark"] .button:focus-visible { box-shadow: 4px 4px 0 var(--text-primary); }
.motion-ready .reveal { opacity: 0; transform: translateY(42px); transition: opacity 700ms ease, transform 700ms cubic-bezier(.2, .75, .25, 1); }
.motion-ready .reveal.is-visible { opacity: 1; transform: translateY(0); }
.motion-ready .experience-row:nth-child(2), .motion-ready .skill-stack article:nth-child(2) { transition-delay: 80ms; }
.motion-ready .experience-row:nth-child(3), .motion-ready .skill-stack article:nth-child(3) { transition-delay: 140ms; }
.motion-ready .skill-stack article:nth-child(4) { transition-delay: 200ms; }

body,
.site-header,
.hero-visual,
.experience,
.projects,
.project-card,
.project-content,
.skills,
.education,
.contact,
footer,
.nav-contact,
.theme-toggle,
.tags span { transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease; }

@media (max-width: 1020px) {
    .hero-grid { grid-template-columns: 1fr; }
    .hero-copy { min-height: 560px; border-right: 0; border-bottom: 1px solid var(--border-primary); }
    .hero-visual { min-height: 580px; }
    .experience-row { grid-template-columns: 1fr; gap: 36px; }
    .skills-grid { grid-template-columns: 1fr; }
    .sticky-head { position: static; }
}

@media (max-width: 760px) {
    .shell { width: min(100% - 32px, 1440px); }
    section[id] { scroll-margin-top: 112px; }
    .nav { min-height: 106px; grid-template-columns: 1fr auto; grid-template-areas: "brand actions" "links links"; gap: 0 18px; }
    .brand { grid-area: brand; }
    .nav-actions { grid-area: actions; }
    .nav-links { grid-area: links; display: flex; justify-content: stretch; gap: 0; border-top: 1px solid var(--border-primary); }
    .nav-links a { min-height: 44px; flex: 1; padding: 11px 4px 10px; display: flex; align-items: center; justify-content: center; text-align: center; }
    .nav-links a.is-active::before { bottom: 1px; }
    .hero-grid { width: 100%; border-inline: 0; }
    .hero-copy { min-height: auto; padding: 64px 16px 56px; }
    h1 { font-size: clamp(3.6rem, 19vw, 6rem); }
    .hero-visual { min-height: 480px; }
    .portrait-wrap { width: 72%; }
    .role-head { grid-template-columns: 1fr; }
    .date { padding: 0; }
    .project-grid { grid-template-columns: 1fr; }
    .project-card { border-right: 0; border-bottom: 1px solid var(--border-primary); }
    .project-card:last-child { border-bottom: 0; }
    .skill-stack article { grid-template-columns: 1fr; min-height: 100px; padding-block: 22px; row-gap: 12px; }
    .education-record { grid-template-columns: 1fr; row-gap: 12px; }
    .footer-inner { grid-template-columns: 1fr auto; padding-block: 24px; }
}

@media (max-width: 440px) {
    .theme-toggle { padding: 0; }
    .theme-label { display: none; }
    .button { width: 100%; }
    .project-content { padding: 30px 22px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    .motion-ready .reveal { opacity: 1; transform: none; }
}