:root {
  --bg: #050b16;
  --surface: #091425;
  --surface-2: #0d1b2e;
  --surface-3: #12233a;
  --text: #edf6ff;
  --muted: #9aabc0;
  --cyan: #48d9ff;
  --violet: #9c7cff;
  --green: #6fe7bd;
  --line: rgba(153, 190, 226, .16);
  --line-strong: rgba(72, 217, 255, .35);
  --sans: "DM Sans", Arial, sans-serif;
  --serif: "Newsreader", Georgia, serif;
  --mono: "DM Mono", monospace;
  --max: 1180px;
  --radius: 14px;
  --shadow: 0 28px 80px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; overflow-x: hidden; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.7 var(--sans); overflow-x: hidden; }
body::before { content: ""; position: fixed; inset: 0; pointer-events: none; z-index: -1; background: radial-gradient(circle at 15% 8%, rgba(38, 118, 185, .16), transparent 26rem), radial-gradient(circle at 90% 30%, rgba(102, 66, 190, .12), transparent 28rem); }
a { color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; clip: rect(0,0,0,0); overflow: hidden; }
.skip-link { position: fixed; left: 16px; top: -60px; background: var(--cyan); color: var(--bg); padding: 10px 15px; z-index: 100; font-weight: 700; }
.skip-link:focus { top: 12px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; }

.site-header { height: 74px; position: sticky; top: 0; z-index: 50; background: rgba(5, 11, 22, .86); border-bottom: 1px solid var(--line); backdrop-filter: blur(18px); }
.nav-wrap { max-width: var(--max); height: 100%; margin: auto; padding: 0 24px; display: flex; align-items: center; gap: 32px; }
.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; text-decoration: none; font-weight: 700; }
.brand span:first-child { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid var(--line-strong); background: linear-gradient(145deg, rgba(72,217,255,.16), rgba(156,124,255,.12)); color: var(--cyan); font: 500 .72rem var(--mono); }
.site-header nav { display: flex; gap: 22px; }
.site-header nav a { min-height: 42px; display: inline-flex; align-items: center; color: var(--muted); text-decoration: none; font-size: .81rem; }
.site-header nav a:hover { color: var(--cyan); }
.menu-button { display: none; padding: 10px; border: 0; background: transparent; }
.menu-button > span:not(.sr-only) { display: block; width: 24px; height: 2px; margin: 5px; background: var(--text); }

.hero { position: relative; padding: clamp(72px, 9vw, 128px) 24px 78px; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .38; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 54px 54px; mask-image: linear-gradient(to bottom, black, transparent 90%); }
.hero::after { content: "AI / RESEARCH / SYSTEMS"; position: absolute; right: -20px; top: 115px; color: rgba(72,217,255,.055); font: 500 clamp(3rem, 7vw, 7rem) var(--mono); writing-mode: vertical-rl; letter-spacing: .12em; }
.hero-grid { max-width: var(--max); margin: auto; position: relative; z-index: 1; display: grid; grid-template-columns: 310px minmax(0, 1fr); gap: clamp(52px, 8vw, 105px); align-items: center; }
.portrait-column { position: relative; }
.portrait-column::before { content: "01"; position: absolute; left: -18px; top: -30px; z-index: 3; color: var(--cyan); font: 500 .68rem var(--mono); }
.portrait-frame { position: relative; border: 1px solid var(--line-strong); padding: 9px; background: rgba(12, 27, 46, .7); box-shadow: var(--shadow); }
.portrait-frame::before, .portrait-frame::after { content: ""; position: absolute; width: 38px; height: 38px; border-color: var(--cyan); z-index: 2; }
.portrait-frame::before { left: -1px; top: -1px; border-left: 2px solid; border-top: 2px solid; }
.portrait-frame::after { right: -1px; bottom: -1px; border-right: 2px solid; border-bottom: 2px solid; }
.portrait-frame img { width: 100%; height: 390px; display: block; object-fit: cover; object-position: center 20%; filter: saturate(.72) contrast(1.05); }
.location { margin: 20px 0 0; color: var(--muted); font: 400 .67rem var(--mono); }
.location::before { content: "●"; margin-right: 8px; color: var(--green); }
.hero-copy { min-width: 0; }
.kicker, .section-index { margin: 0 0 16px; color: var(--cyan); font: 500 .68rem var(--mono); text-transform: uppercase; letter-spacing: .13em; }
.hero h1 { display: block; width: fit-content; max-width: 100%; margin: 0 0 28px; padding: .08em .06em .1em .18em; font: 600 clamp(4.4rem, 8vw, 7.4rem)/.86 var(--serif); letter-spacing: -.05em; background: linear-gradient(105deg, #fff 25%, #bdefff 70%, #bba7ff); -webkit-background-clip: text; color: transparent; overflow: visible; }
.headline { max-width: 780px; margin: 0; font-size: clamp(1.18rem, 2vw, 1.45rem); font-weight: 600; line-height: 1.45; }
.research-statement { max-width: 720px; color: var(--muted); font-size: 1rem; }
.hero-links { display: flex; flex-wrap: wrap; gap: 10px; margin: 30px 0 42px; }
.button { min-height: 44px; padding: 10px 16px; display: inline-flex; align-items: center; border: 1px solid var(--line-strong); color: #dcecff; text-decoration: none; font-size: .78rem; font-weight: 600; background: rgba(13,27,46,.65); }
.button:hover { color: var(--cyan); background: var(--surface-3); }
.button-primary { color: #031019; border-color: var(--cyan); background: var(--cyan); }
.button-primary:hover { color: #031019; background: #8ae8ff; }
.quick-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin: 0; padding-top: 24px; border-top: 1px solid var(--line); }
.quick-facts dt { color: var(--cyan); font: 500 .62rem var(--mono); text-transform: uppercase; }
.quick-facts dd { margin: 7px 0 0; color: #cbd8e7; font-size: .76rem; line-height: 1.55; }

.current-note { position: relative; border-block: 1px solid var(--line-strong); background: linear-gradient(90deg, rgba(27,81,117,.4), rgba(89,54,153,.25)); }
.current-note > div { max-width: var(--max); margin: auto; padding: 19px 24px; display: grid; grid-template-columns: 90px 150px 1fr auto; gap: 22px; align-items: center; }
.note-label { color: var(--cyan); font: 500 .62rem var(--mono); text-transform: uppercase; letter-spacing: .14em; }
.current-note time { color: var(--muted); font: 400 .66rem var(--mono); }
.current-note p { margin: 0; font-size: .83rem; }
.current-note a { color: var(--cyan); font-size: .72rem; }

.section { padding: clamp(76px, 9vw, 116px) 24px; }
.section-soft { background: linear-gradient(180deg, rgba(13,27,46,.65), rgba(9,20,37,.62)); border-block: 1px solid var(--line); }
.section > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.section-heading { margin-bottom: 46px; }
.section-heading h2 { margin: 0; font: 600 clamp(2.8rem, 5vw, 4.5rem)/1 var(--serif); letter-spacing: -.03em; }
.section-heading > p:last-child { max-width: 650px; color: var(--muted); }
.heading-row { display: flex; justify-content: space-between; align-items: end; gap: 25px; }
.heading-row > a, .subsection-header > a { color: var(--cyan); font-size: .74rem; font-weight: 600; }
.about-layout { display: grid; grid-template-columns: .9fr 1.15fr; gap: clamp(50px, 8vw, 100px); }
.lead { margin: 0; font: 500 clamp(1.7rem, 3vw, 2.5rem)/1.28 var(--serif); }
.body-copy { max-width: 650px; color: var(--muted); }
.body-copy p:first-child { margin-top: 0; }

.focus-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.focus-grid article, .current-research-grid article { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(145deg, rgba(18,35,58,.9), rgba(9,20,37,.9)); }
.focus-grid span, .current-research-grid span { color: var(--cyan); font: 500 .62rem var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.focus-grid h3, .current-research-grid h3 { margin: 26px 0 10px; font: 600 1.32rem/1.25 var(--serif); }
.focus-grid p, .current-research-grid p { margin: 0; color: var(--muted); font-size: .82rem; }
.current-research-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 18px; }
.current-research-grid article { border-color: var(--line-strong); }
.subsection-header { display: flex; justify-content: space-between; align-items: center; margin-top: 70px; padding-bottom: 13px; border-bottom: 1px solid var(--line-strong); }
.subsection-header h3 { margin: 0; font: 600 1.55rem var(--serif); }
.subsection-header > span { color: var(--green); font: 500 .62rem var(--mono); text-transform: uppercase; }
.publication-list article { display: grid; grid-template-columns: 85px 1fr; gap: 30px; padding: 27px 0; border-bottom: 1px solid var(--line); }
.publication-list time, .timeline-date, .education-list time { color: var(--cyan); font: 400 .68rem var(--mono); }
.publication-list h3 { margin: 0; font-size: .94rem; line-height: 1.5; }
.publication-list p { margin: 5px 0; color: var(--muted); font-size: .77rem; }
.publication-list a { color: var(--cyan); font-size: .72rem; }

.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.project-card { min-width: 0; min-height: 500px; display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.project-card:hover { transform: translateY(-5px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.project-card > img { width: 100%; aspect-ratio: 16/10; height: auto; object-fit: cover; border-bottom: 1px solid var(--line); }
.project-content { display: flex; flex: 1; flex-direction: column; padding: 23px; }
.project-meta { display: flex; justify-content: space-between; gap: 8px; color: var(--cyan); font: 500 .58rem var(--mono); text-transform: uppercase; }
.project-card h3 { margin: 21px 0 9px; font: 600 1.45rem/1.15 var(--serif); }
.project-card p { margin: 0 0 18px; color: var(--muted); font-size: .8rem; }
.project-card ul { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 22px; padding: 0; list-style: none; }
.project-card li { padding: 3px 7px; border: 1px solid var(--line); color: #b6c5d7; font: 400 .58rem var(--mono); }
.project-card a { margin-top: auto; color: var(--cyan); font-size: .72rem; font-weight: 600; }

.timeline article, .education-list article { display: grid; grid-template-columns: 185px 1fr; gap: 42px; padding: 29px 0; border-top: 1px solid var(--line); }
.timeline h3, .education-list h3 { margin: 0; font: 600 1.15rem var(--serif); }
.timeline h4 { margin: 4px 0; color: var(--cyan); font-size: .82rem; }
.timeline p, .education-list p { max-width: 700px; margin: 6px 0; color: var(--muted); font-size: .8rem; }
.education-header { margin-top: 68px; }

.skills-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.skills-grid article { padding: 25px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.skills-grid h3 { margin: 0 0 10px; color: var(--cyan); font: 500 .72rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.skills-grid p { margin: 0; color: #c0cddd; font-size: .82rem; }

.news-list { border-top: 1px solid var(--line-strong); }
.news-list article { display: grid; grid-template-columns: 130px 105px 1fr auto; gap: 22px; align-items: start; padding: 25px 0; border-bottom: 1px solid var(--line); }
.news-list time { color: var(--cyan); font: 400 .66rem var(--mono); }
.news-list span { color: var(--green); font: 500 .61rem var(--mono); text-transform: uppercase; }
.news-list h3 { margin: 0; font-size: .9rem; line-height: 1.55; }
.news-list a { color: var(--cyan); font-size: .69rem; }

.service-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; }
.service-columns > div > h3 { margin: 0; padding-bottom: 13px; border-bottom: 1px solid var(--line-strong); font: 600 1.4rem var(--serif); }
.service-columns article { padding: 18px 0; border-bottom: 1px solid var(--line); }
.service-columns time { color: var(--cyan); font: 400 .63rem var(--mono); }
.service-columns h4 { margin: 7px 0 1px; font-size: .9rem; }
.service-columns p { margin: 3px 0; color: var(--muted); font-size: .75rem; }

.honors-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.honors-grid article { min-height: 235px; padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.honors-grid span { color: var(--green); font: 500 .62rem var(--mono); text-transform: uppercase; }
.honors-grid h3 { margin: 30px 0 10px; font: 600 1.4rem var(--serif); }
.honors-grid p { color: var(--muted); font-size: .77rem; }
.honors-grid a { color: var(--cyan); font-size: .7rem; }
.recommendation, .beyond { margin-top: 34px; padding-top: 28px; border-top: 1px solid var(--line); }
.recommendation blockquote { max-width: 800px; margin: 13px 0; font: 500 clamp(1.7rem, 3vw, 2.7rem)/1.25 var(--serif); color: #dbe9f7; }
.recommendation > p:last-child, .recommendation-note, .beyond > p:last-child { max-width: 720px; color: var(--muted); font-size: .78rem; }
.beyond h3 { margin: 8px 0; font: 600 1.35rem var(--serif); }

.credential-list { border-top: 1px solid var(--line-strong); }
.credential-list a { min-height: 76px; display: grid; grid-template-columns: 210px 1fr auto; gap: 24px; align-items: center; padding: 17px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.credential-list a:hover strong { color: var(--cyan); }
.credential-list span { color: var(--muted); font: 400 .65rem var(--mono); }
.credential-list strong { font-size: .86rem; }
.credential-list em { color: var(--cyan); font-style: normal; font-size: .67rem; }

.contact-section { padding: clamp(82px, 10vw, 128px) 24px; position: relative; overflow: hidden; background: linear-gradient(135deg, #0b2644, #10264d 55%, #251b4a); border-top: 1px solid var(--line-strong); }
.contact-section::after { content: ""; position: absolute; width: 500px; height: 500px; right: -220px; top: -250px; border: 1px solid rgba(72,217,255,.2); border-radius: 50%; box-shadow: 0 0 0 70px rgba(72,217,255,.03), 0 0 0 140px rgba(156,124,255,.025); }
.contact-section > div { max-width: 900px; margin: auto; position: relative; z-index: 1; }
.contact-section h2 { margin: 20px 0; font: 600 clamp(3rem, 7vw, 6rem)/.95 var(--serif); letter-spacing: -.04em; }
.contact-section > div > p:not(.section-index) { color: #b9c9da; }
.contact-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.contact-links a { min-height: 44px; display: inline-flex; align-items: center; padding: 9px 15px; border: 1px solid var(--line-strong); text-decoration: none; font-size: .73rem; }
.contact-links a:hover { color: var(--cyan); background: rgba(72,217,255,.08); }
footer { padding: 24px; background: #030812; border-top: 1px solid var(--line); color: #70829a; }
footer > div { max-width: var(--max); margin: auto; display: flex; justify-content: space-between; font-size: .65rem; }

@media (max-width: 68rem) {
  .site-header nav { gap: 14px; }
  .hero-grid { grid-template-columns: 250px minmax(0,1fr); }
  .portrait-frame img { height: 330px; }
  .quick-facts { grid-template-columns: 1fr 1fr; }
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .focus-grid { grid-template-columns: 1fr; }
  .news-list article { grid-template-columns: 115px 90px 1fr; }
  .news-list a { grid-column: 3; }
}

@media (max-width: 48rem) {
  body.menu-open { overflow: hidden; }
  .site-header { height: 64px; }
  .nav-wrap { padding: 0 18px; }
  .menu-button { display: block; }
  .site-header nav { display: none; position: absolute; left: 0; right: 0; top: 64px; padding: 18px; flex-direction: column; background: rgba(5,11,22,.98); border-bottom: 1px solid var(--line-strong); box-shadow: var(--shadow); }
  .site-header nav.open { display: flex; }
  .site-header nav a { min-height: 44px; }
  .hero { max-width: 100vw; padding: 48px 20px 56px; }
  .hero::after { display: none; }
  .hero-grid { width: 100%; grid-template-columns: 1fr; gap: 36px; }
  .portrait-column { width: 180px; }
  .portrait-frame img { height: 225px; }
  .location { width: 230px; }
  .hero h1 { font-size: 3.7rem; }
  .headline, .research-statement { max-width: 20rem; overflow-wrap: anywhere; }
  .hero-links { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; justify-content: center; }
  .quick-facts { grid-template-columns: 1fr; gap: 14px; }
  .current-note > div { grid-template-columns: 1fr; gap: 7px; }
  .section { padding: 70px 20px; }
  .heading-row { display: block; }
  .heading-row > a { display: inline-block; margin-top: 14px; }
  .about-layout, .project-grid, .current-research-grid, .service-columns, .honors-grid, .skills-grid { grid-template-columns: 1fr; }
  .publication-list article { grid-template-columns: 55px 1fr; gap: 18px; }
  .timeline article, .education-list article { grid-template-columns: 1fr; gap: 7px; }
  .news-list article { grid-template-columns: 1fr; gap: 6px; }
  .news-list a { grid-column: auto; }
  .credential-list a { grid-template-columns: 1fr; gap: 5px; padding: 20px 0; }
  .subsection-header { align-items: flex-start; gap: 18px; }
  .contact-section { padding: 78px 20px; }
  .contact-section h2 { font-size: 3.2rem; }
  footer > div { display: grid; gap: 5px; }
}

@media (max-width: 22rem) {
  .hero h1 { font-size: 3.2rem; }
  .section-heading h2 { font-size: 2.55rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .project-card { transition: none; }
}