:root {
  --bg: #07101d;
  --bg-2: #0a1626;
  --panel: rgba(12, 27, 45, .72);
  --panel-solid: #0d1b2d;
  --text: #edf6ff;
  --muted: #91a6ba;
  --line: rgba(154, 185, 211, .16);
  --cyan: #50e3ff;
  --cyan-2: #22b7d8;
  --lime: #a7f46a;
  --orange: #ffb765;
  --shadow: 0 20px 80px rgba(0,0,0,.35);
  --radius: 20px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
::selection { background: var(--cyan); color: #041019; }

.skip-link { position: fixed; left: 12px; top: -80px; z-index: 9999; background: var(--cyan); color: #041019; padding: 10px 14px; border-radius: 8px; font-weight: 700; }
.skip-link:focus { top: 12px; }

.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.section { padding: 110px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, rgba(17,37,60,.48), rgba(8,18,31,.22)); border-block: 1px solid var(--line); }

.grid-overlay { position: fixed; inset: 0; pointer-events: none; opacity: .15; z-index: -3; background-image: linear-gradient(rgba(80,227,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(80,227,255,.12) 1px, transparent 1px); background-size: 54px 54px; mask-image: linear-gradient(to bottom, black, transparent 70%); }
.ambient { position: fixed; width: 40vw; height: 40vw; border-radius: 50%; filter: blur(100px); opacity: .10; z-index: -4; pointer-events: none; }
.ambient-1 { background: var(--cyan); top: -15vw; right: -12vw; }
.ambient-2 { background: #7b5cff; bottom: -20vw; left: -16vw; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(7,16,29,.74); backdrop-filter: blur(18px); border-bottom: 1px solid rgba(154,185,211,.08); }
.nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark { width: 42px; height: 42px; border: 1px solid rgba(80,227,255,.5); border-radius: 12px; display: grid; place-items: center; font: 700 14px/1 "IBM Plex Mono", monospace; color: var(--cyan); box-shadow: inset 0 0 22px rgba(80,227,255,.07); }
.brand-mark.small { width: 36px; height: 36px; border-radius: 10px; }
.brand-copy { display: grid; line-height: 1.2; }
.brand-copy strong { font-size: 14px; }
.brand-copy small { color: var(--muted); font: 11px/1.4 "IBM Plex Mono", monospace; }
.nav-links { display: flex; align-items: center; gap: 26px; color: #afc1d2; font-size: 13px; }
.nav-links a:hover, .nav-links a.active { color: var(--cyan); }
.nav-cta { border: 1px solid var(--line); border-radius: 999px; padding: 9px 15px; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: transparent; border-radius: 11px; padding: 10px; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--text); }

.hero { min-height: calc(100vh - 76px); display: grid; grid-template-columns: minmax(0, 1.32fr) minmax(340px, .68fr); gap: 72px; align-items: center; padding-top: 78px; }
.eyebrow, .section-index { font: 600 12px/1.4 "IBM Plex Mono", monospace; letter-spacing: .08em; text-transform: uppercase; color: var(--cyan); }
.status-dot { width: 8px; height: 8px; display: inline-block; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 5px rgba(167,244,106,.08), 0 0 24px rgba(167,244,106,.55); margin-right: 9px; }
.hero h1 { max-width: 850px; margin: 20px 0 22px; font-size: clamp(44px, 6vw, 78px); line-height: 1.04; letter-spacing: -.055em; }
.hero h1 span { color: var(--cyan); }
.hero-lead { max-width: 820px; margin: 0; color: #b5c8d9; font-size: clamp(16px, 1.5vw, 19px); }
.hero-lead strong { color: var(--text); font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 34px 0 42px; }
.btn { display: inline-flex; gap: 10px; align-items: center; justify-content: center; padding: 13px 18px; border-radius: 12px; font-weight: 700; font-size: 14px; transition: .25s ease; }
.btn-primary { background: var(--cyan); color: #041019; box-shadow: 0 10px 38px rgba(80,227,255,.18); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 45px rgba(80,227,255,.28); }
.btn-ghost { border: 1px solid var(--line); color: #c8d8e6; background: rgba(255,255,255,.02); }
.btn-ghost:hover { border-color: rgba(80,227,255,.42); color: var(--cyan); }
.hero-meta { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); padding-top: 22px; max-width: 790px; }
.hero-meta div { display: grid; gap: 2px; padding-right: 18px; }
.hero-meta strong { font-size: 13px; }
.hero-meta span { color: var(--muted); font-size: 11px; }

.hero-panel { position: relative; border: 1px solid rgba(80,227,255,.18); border-radius: 22px; background: linear-gradient(180deg, rgba(14,34,55,.92), rgba(8,20,34,.78)); box-shadow: var(--shadow); overflow: hidden; min-height: 420px; }
.hero-panel::after { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, transparent 45%, rgba(80,227,255,.035), transparent 55%); transform: translateX(-100%); animation: scan 7s infinite; pointer-events: none; }
.terminal-bar { height: 50px; display: flex; align-items: center; gap: 18px; padding: 0 16px; border-bottom: 1px solid var(--line); color: #688098; font: 11px/1 "IBM Plex Mono", monospace; }
.terminal-dots { display: flex; gap: 6px; }
.terminal-dots i { width: 8px; height: 8px; border-radius: 50%; background: #31475c; }
.terminal-body { padding: 30px 26px; color: #9fb6c9; font: 13px/1.8 "IBM Plex Mono", monospace; position: relative; z-index: 2; }
.prompt { color: var(--lime); }
.code-lines { display: grid; gap: 8px; margin: 16px 0 28px; padding-left: 12px; border-left: 1px solid rgba(80,227,255,.2); }
.code-lines span { color: #7790a4; }
.code-lines b { color: var(--cyan); font-weight: 500; }
.terminal-last { margin-top: 22px; color: #c9d8e4; }
.cursor { color: var(--cyan); animation: blink 1s steps(1) infinite; }
.orbit { position: absolute; width: 170px; height: 170px; right: -55px; bottom: -62px; border: 1px solid rgba(80,227,255,.15); border-radius: 50%; }
.orbit span { position: absolute; inset: 18px; border: 1px solid rgba(80,227,255,.1); border-radius: 50%; }
.orbit span:nth-child(2) { inset: 40px; }
.orbit span:nth-child(3) { inset: 66px; background: rgba(80,227,255,.16); box-shadow: 0 0 30px rgba(80,227,255,.22); }

.section-heading { max-width: 780px; margin-bottom: 46px; }
.section-heading h2 { font-size: clamp(34px, 4.2vw, 58px); line-height: 1.08; letter-spacing: -.045em; margin: 13px 0 16px; }
.section-heading p { color: var(--muted); font-size: 17px; margin: 0; }
.card, .mini-card, .research-card, .project-card, .contact-card { border: 1px solid var(--line); background: var(--panel); box-shadow: 0 8px 50px rgba(0,0,0,.12); }
.about-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 22px; }
.about-card { border-radius: var(--radius); padding: 34px; }
.about-card h3, .mini-card h3 { margin-top: 0; }
.about-card p { color: #b2c5d5; font-size: 17px; }
.signature { margin-top: 34px; font: 600 13px/1.5 "IBM Plex Mono", monospace; color: var(--cyan); }
.signature span { display: block; color: #688198; font-weight: 400; }
.focus-stack { display: grid; gap: 14px; }
.mini-card { border-radius: 16px; padding: 24px; display: flex; gap: 20px; align-items: flex-start; transition: .25s ease; }
.mini-card:hover { transform: translateX(5px); border-color: rgba(80,227,255,.3); }
.mini-icon { flex: 0 0 38px; height: 38px; border: 1px solid rgba(80,227,255,.2); border-radius: 10px; display: grid; place-items: center; color: var(--cyan); font: 600 18px/1 "IBM Plex Mono", monospace; }
.mini-card h3 { margin-bottom: 6px; font-size: 16px; }
.mini-card p { margin: 0; color: var(--muted); font-size: 13px; }

.research-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.research-card { min-height: 255px; border-radius: 18px; padding: 26px; display: flex; flex-direction: column; transition: .25s ease; }
.research-card:hover { transform: translateY(-4px); border-color: rgba(80,227,255,.28); }
.research-card > span { color: #45627a; font: 600 12px/1 "IBM Plex Mono", monospace; }
.research-card h3 { margin: 36px 0 10px; font-size: 19px; }
.research-card p { color: var(--muted); font-size: 13px; margin: 0 0 24px; }
.tags { margin-top: auto; display: flex; flex-wrap: wrap; gap: 7px; }
.tags i, .skill-row i { font-style: normal; color: #85a0b6; border: 1px solid var(--line); background: rgba(255,255,255,.02); border-radius: 999px; padding: 5px 9px; font: 500 10px/1.2 "IBM Plex Mono", monospace; }

.project-filters { display: flex; flex-wrap: wrap; gap: 8px; margin: -14px 0 28px; }
.filter { border: 1px solid var(--line); color: #8ea6ba; background: rgba(255,255,255,.018); border-radius: 999px; padding: 9px 13px; cursor: pointer; transition: .2s ease; }
.filter:hover, .filter.active { color: #041019; background: var(--cyan); border-color: var(--cyan); }
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.project-card { border-radius: var(--radius); padding: 28px; min-height: 300px; display: flex; flex-direction: column; transition: .3s ease; }
.project-card.featured { background: linear-gradient(150deg, rgba(26,63,82,.8), rgba(10,25,42,.74)); }
.project-card:hover { transform: translateY(-5px); border-color: rgba(80,227,255,.3); }
.project-card.hidden { display: none; }
.project-top { display: flex; justify-content: space-between; align-items: center; }
.project-kicker { color: var(--cyan); font: 600 11px/1.4 "IBM Plex Mono", monospace; text-transform: uppercase; }
.project-arrow { color: #5c7890; font-size: 20px; }
.project-card h3 { margin: 30px 0 11px; font-size: 24px; line-height: 1.2; }
.project-card p { margin: 0 0 25px; color: var(--muted); font-size: 14px; }
.project-result { margin: 0 0 24px; padding: 13px 15px; border-left: 2px solid var(--cyan); background: rgba(80,227,255,.035); display: grid; gap: 2px; }
.project-result strong { color: var(--cyan); font: 600 10px/1.2 "IBM Plex Mono", monospace; text-transform: uppercase; }
.project-result span { color: #b9ccda; font-size: 12px; }

.timeline { position: relative; max-width: 930px; }
.timeline::before { content: ""; position: absolute; left: 118px; top: 8px; bottom: 8px; width: 1px; background: var(--line); }
.timeline-item { display: grid; grid-template-columns: 90px 56px 1fr; align-items: start; padding: 22px 0; }
.timeline-year { padding-top: 6px; color: #718aa0; font: 600 12px/1 "IBM Plex Mono", monospace; text-align: right; }
.timeline-dot { width: 11px; height: 11px; margin: 7px auto 0; border: 2px solid var(--cyan); border-radius: 50%; background: var(--bg-2); box-shadow: 0 0 0 6px rgba(80,227,255,.05); z-index: 2; }
.timeline-content { padding: 0 0 24px 8px; }
.timeline-content span { color: var(--cyan); font: 500 11px/1.4 "IBM Plex Mono", monospace; }
.timeline-content h3 { margin: 7px 0 7px; font-size: 21px; }
.timeline-content p { margin: 0; color: var(--muted); }

.skills-board { border-block: 1px solid var(--line); }
.skill-row { display: grid; grid-template-columns: 190px 1fr; gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.skill-row:last-child { border-bottom: none; }
.skill-row > span { color: var(--cyan); font: 600 11px/1.5 "IBM Plex Mono", monospace; text-transform: uppercase; letter-spacing: .05em; }
.skill-row > div { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-row i { color: #aec1d1; padding: 7px 11px; }

.publications-list { border-top: 1px solid var(--line); }
.publication { display: grid; grid-template-columns: 90px 1fr 50px; gap: 22px; align-items: center; padding: 28px 0; border-bottom: 1px solid var(--line); transition: .2s ease; }
.publication:hover { padding-left: 12px; }
.pub-year { color: var(--cyan); font: 600 12px/1 "IBM Plex Mono", monospace; }
.publication h3 { margin: 0 0 6px; font-size: 18px; }
.publication p { margin: 0; color: var(--muted); font-size: 13px; }
.publication > a { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 11px; color: var(--cyan); }

.contact-card { border-radius: 28px; padding: 46px; display: grid; grid-template-columns: 1.15fr .85fr; gap: 70px; background: linear-gradient(135deg, rgba(20,48,70,.82), rgba(9,23,39,.92)); }
.contact-card h2 { font-size: clamp(34px, 4vw, 56px); line-height: 1.08; letter-spacing: -.04em; margin: 14px 0; }
.contact-card p { color: var(--muted); max-width: 640px; }
.contact-links { border-top: 1px solid var(--line); }
.contact-links a { display: flex; justify-content: space-between; gap: 20px; padding: 18px 4px; border-bottom: 1px solid var(--line); }
.contact-links span { color: #8097aa; font: 500 11px/1.4 "IBM Plex Mono", monospace; text-transform: uppercase; }
.contact-links strong { font-size: 13px; }
.contact-links a:hover strong { color: var(--cyan); }

.footer { min-height: 170px; display: flex; align-items: center; justify-content: space-between; gap: 30px; border-top: 1px solid var(--line); }
.footer > div { display: flex; align-items: center; gap: 12px; }
.footer p { margin: 0; font-size: 12px; color: #8da3b6; }
.footer small { color: #60778c; }
.footer-copy, .back-top { font: 500 11px/1.4 "IBM Plex Mono", monospace; color: #647e94; }
.back-top:hover { color: var(--cyan); }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

@keyframes blink { 50% { opacity: 0; } }
@keyframes scan { 0%, 60% { transform: translateX(-110%); } 78%, 100% { transform: translateX(110%); } }

@media (max-width: 980px) {
  .nav-links { position: fixed; inset: 77px 20px auto 20px; display: none; flex-direction: column; align-items: stretch; gap: 0; background: #0a1727; border: 1px solid var(--line); border-radius: 16px; padding: 10px; box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 14px; }
  .menu-toggle { display: block; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-bottom: 90px; gap: 48px; }
  .hero-panel { min-height: 350px; }
  .about-grid, .contact-card { grid-template-columns: 1fr; }
  .research-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-card { gap: 30px; }
}

@media (max-width: 680px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .section { padding: 78px 0; }
  .brand-copy small { display: none; }
  .hero { padding-top: 52px; }
  .hero h1 { font-size: clamp(40px, 13vw, 60px); }
  .hero-meta { grid-template-columns: 1fr; gap: 14px; }
  .hero-meta div { border-left: 1px solid var(--line); padding-left: 12px; }
  .research-grid, .projects-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 10px; }
  .timeline-item { grid-template-columns: 22px 1fr; gap: 14px; }
  .timeline-year { grid-column: 2; text-align: left; padding: 0; }
  .timeline-dot { grid-column: 1; grid-row: 1 / span 2; margin: 2px auto 0; }
  .timeline-content { grid-column: 2; padding-left: 0; }
  .skill-row { grid-template-columns: 1fr; gap: 12px; }
  .publication { grid-template-columns: 55px 1fr; gap: 14px; }
  .publication > a { grid-column: 2; width: 100%; height: 36px; }
  .contact-card { padding: 28px 22px; }
  .footer { padding: 34px 0; flex-direction: column; align-items: flex-start; min-height: auto; }
}

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