:root {
  --bg: #FBFAF7;
  --surface: #FFFFFF;
  --surface-2: #F3F1EC;
  --text: #15181E;
  --muted: #5A6170;
  --faint: #8A909C;
  --line: #E5E2DA;
  --accent: #0F766E;
  --accent-ink: #0B5A54;
  --accent-soft: #E3F1EF;
  --blue: #1D4ED8;
  --gold: #A16207;
  --gold-soft: #FBF1DC;
  --term-bg: #0B1220;
  --term-text: #D7DEEA;
  --term-muted: #7D8AA3;
  --shadow: 0 1px 2px rgba(20, 24, 32, .04), 0 8px 24px -12px rgba(20, 24, 32, .12);

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0A0E16;
    --surface: #10161F;
    --surface-2: #141B26;
    --text: #E6EAF1;
    --muted: #A0A9B8;
    --faint: #6E7888;
    --line: #1F2734;
    --accent: #2DD4BF;
    --accent-ink: #5EEAD4;
    --accent-soft: rgba(45, 212, 191, .10);
    --blue: #7AA2FF;
    --gold: #F2C14E;
    --gold-soft: rgba(242, 193, 78, .12);
    --term-bg: #060A12;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px -16px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0A0E16;
  --surface: #10161F;
  --surface-2: #141B26;
  --text: #E6EAF1;
  --muted: #A0A9B8;
  --faint: #6E7888;
  --line: #1F2734;
  --accent: #2DD4BF;
  --accent-ink: #5EEAD4;
  --accent-soft: rgba(45, 212, 191, .10);
  --blue: #7AA2FF;
  --gold: #F2C14E;
  --gold-soft: rgba(242, 193, 78, .12);
  --term-bg: #060A12;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px -16px rgba(0, 0, 0, .6);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: 3px; }
a:hover { color: var(--accent-ink); text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

strong { font-weight: 600; }
h1, h2, h3 { margin: 0; font-weight: 500; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }

.wrap { --gutter: 24px; width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 var(--gutter); }


.skip { position: absolute; left: -9999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.topbar.scrolled { border-bottom-color: var(--line); }
.topbar-inner { display: flex; align-items: center; gap: 24px; height: 60px; }

.mark { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; }
.mark:hover { color: var(--text); }
.mark-badge {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, #1D4ED8, #0F766E); color: #fff;
  font: 600 12px/1 var(--mono); letter-spacing: .02em;
}
.mark-name { font-size: 15px; }

.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  text-decoration: none; color: var(--muted); font-size: 14px;
  padding: 6px 10px; border-radius: 8px; transition: color .15s, background .15s;
}
.nav a:hover, .nav a.active { color: var(--text); background: var(--surface-2); }

.theme-toggle {
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--surface); color: var(--muted); cursor: pointer;
}
.theme-toggle:hover { color: var(--text); }
.theme-toggle svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.i-moon { display: none; }
:root[data-theme="dark"] .i-sun { display: none; }
:root[data-theme="dark"] .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i-sun { display: none; }
  :root:not([data-theme="light"]) .i-moon { display: block; }
}

/* ---------- Hero ---------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 56px; align-items: center; padding-top: 88px; padding-bottom: 56px;
}
.eyebrow { font: 500 12.5px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); margin-bottom: 18px; }
.hero h1 { font: 500 clamp(44px, 7vw, 76px)/1 var(--serif); letter-spacing: -0.02em; margin-bottom: 22px; }
.lede { font: 400 clamp(19px, 2.2vw, 22px)/1.5 var(--serif); color: var(--text); margin-bottom: 16px; max-width: 34em; }
.intro { color: var(--muted); max-width: 38em; margin-bottom: 28px; }
.intro strong { color: var(--text); }

.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 15px;
  border-radius: 10px; border: 1px solid var(--line); background: var(--surface);
  font-size: 14px; font-weight: 500; text-decoration: none; color: var(--text);
  transition: border-color .15s, transform .15s;
}
.btn:hover { border-color: var(--faint); color: var(--text); transform: translateY(-1px); }
.btn svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.btn .hf { font-size: 15px; line-height: 1; }
.btn-primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.btn-primary:hover { color: var(--bg); border-color: var(--text); }

/* Terminal card */
.signal {
  background: var(--term-bg); color: var(--term-text); border-radius: 14px;
  box-shadow: var(--shadow); overflow: hidden; font: 400 13px/1.6 var(--mono);
  border: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
}
.signal-head {
  display: flex; align-items: center; gap: 12px; padding: 11px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, .07); color: var(--term-muted); font-size: 12px;
}
.dots { display: flex; gap: 6px; }
.dots i { width: 9px; height: 9px; border-radius: 50%; background: #2A3447; }
.signal-body { margin: 0; padding: 16px 18px 6px; }
.signal-body div { display: grid; grid-template-columns: 108px 1fr; gap: 10px; padding: 3px 0; }
.signal-body dt { color: #5EEAD4; }
.signal-body dt::after { content: " :"; color: var(--term-muted); }
.signal-body dd { margin: 0; }

.block-demo { padding: 14px 18px 16px; border-top: 1px dashed rgba(255, 255, 255, .08); margin-top: 10px; }
.block-row { display: grid; grid-template-columns: repeat(16, 1fr); gap: 4px; }
.block-row span { aspect-ratio: 1; border-radius: 3px; background: #1C2536; transition: background .35s ease, transform .35s ease; }
.block-row span.draft { background: #3B5BDB; }
.block-row span.commit { background: #2DD4BF; }
.block-row span.remask { background: #1C2536; transform: scale(.82); }
.block-legend { display: flex; gap: 16px; margin-top: 10px; font-size: 11px; color: var(--term-muted); }
.block-legend span { display: inline-flex; align-items: center; gap: 6px; }
.block-legend i { width: 8px; height: 8px; border-radius: 2px; display: inline-block; }
.k-mask { background: #1C2536; outline: 1px solid #2A3447; }
.k-draft { background: #3B5BDB; }
.k-commit { background: #2DD4BF; }

/* ---------- Stats ---------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  background:
    linear-gradient(var(--line), var(--line)) top center / calc(100% - 2 * var(--gutter)) 1px no-repeat,
    linear-gradient(var(--line), var(--line)) bottom center / calc(100% - 2 * var(--gutter)) 1px no-repeat;
  margin-bottom: 24px;
}
.stat { padding: 26px 20px 24px 0; display: flex; flex-direction: column; gap: 6px; }
.stat + .stat { padding-left: 20px; border-left: 1px solid var(--line); }
.stat-num { font: 500 28px/1.1 var(--serif); letter-spacing: -0.01em; }
.stat-num small { font-size: 17px; color: var(--muted); }
.stat-label { font-size: 13px; color: var(--muted); line-height: 1.45; }

/* ---------- Sections ---------- */
.section {
  display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 32px;
  padding-top: 56px; padding-bottom: 56px;
  background: linear-gradient(var(--line), var(--line)) bottom center / calc(100% - 2 * var(--gutter)) 1px no-repeat;
}
.section-label {
  font: 500 12.5px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase;
  color: var(--faint); padding-top: 6px; position: sticky; top: 84px; align-self: start;
}
.when { font: 400 13px/1.4 var(--mono); color: var(--faint); white-space: nowrap; }

/* Timeline */
.timeline { list-style: none; display: grid; gap: 36px; }
.job-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.job h3 { font: 500 22px/1.3 var(--serif); }
.org-note { font: 400 13px/1 var(--sans); color: var(--faint); margin-left: 8px; }
.role { color: var(--accent-ink); font-size: 14.5px; font-weight: 500; margin: 2px 0 12px; }
.job ul { list-style: none; display: grid; gap: 8px; }
.job li li, .job ul li { position: relative; padding-left: 18px; color: var(--muted); }
.job ul li::before { content: ""; position: absolute; left: 2px; top: .72em; width: 6px; height: 1.5px; background: var(--faint); }
.job ul li strong { color: var(--text); }
.job a { color: var(--text); }

/* Papers */
.papers { display: grid; gap: 20px; }
.paper {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 22px 24px; box-shadow: var(--shadow);
}
.paper-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.paper-meta span { font: 500 11.5px/1 var(--mono); padding: 6px 8px; border-radius: 6px; letter-spacing: .02em; }
.venue { background: var(--accent-soft); color: var(--accent-ink); }
.pos { background: var(--surface-2); color: var(--muted); }
.pos.award { background: var(--gold-soft); color: var(--gold); }
.paper h3 { font: 500 21px/1.35 var(--serif); margin-bottom: 10px; }
.paper h3 a { text-decoration: none; }
.paper h3 a:hover { text-decoration: underline; }
.paper > p { color: var(--muted); }
.paper > p strong { color: var(--text); }
.metrics { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 14px; font-size: 14px; color: var(--muted); }
.metrics b { font: 500 14px var(--mono); color: var(--text); margin-right: 4px; }
.metrics .delta { color: var(--accent-ink); }
.advisors { font-size: 13px; color: var(--faint) !important; margin-top: 12px; }

/* Project cards */
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.card {
  display: flex; flex-direction: column; gap: 8px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px 22px;
  transition: border-color .2s, transform .2s;
}
.card:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); transform: translateY(-2px); }
.card-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.card h3 { font: 500 20px/1.3 var(--serif); }
.card-links { display: flex; gap: 12px; }
.card-link { font: 500 12.5px var(--mono); color: var(--accent-ink); text-decoration: none; white-space: nowrap; }
.card-link:hover { text-decoration: underline; }
.card-sub { font-size: 13.5px; color: var(--accent-ink); font-weight: 500; }
.card > p:not(.card-sub):not(.card-foot) { color: var(--muted); font-size: 15px; }
.card > p strong { color: var(--text); }
.card-foot { font: 400 12.5px/1.55 var(--mono); color: var(--text); background: var(--surface-2); padding: 8px 10px; border-radius: 8px; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 6px; }
.tags li { font: 400 11.5px/1 var(--mono); color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 5px 9px; }

.sub-label { font: 500 12.5px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); margin: 40px 0 8px; }
.more { list-style: none; }
.more li { display: grid; grid-template-columns: 220px 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.more li:last-child { border-bottom: 0; }
.more a { font-weight: 500; text-decoration: none; }
.more a::after { content: " ↗"; color: var(--faint); font-size: 12px; }
.more span { color: var(--muted); font-size: 15px; }

/* Skills */
.skills { margin: 0; display: grid; gap: 0; }
.skills div { display: grid; grid-template-columns: 120px 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.skills div:last-child { border-bottom: 0; }
.skills dt { font: 500 13px/1.6 var(--mono); color: var(--accent-ink); }
.skills dd { margin: 0; color: var(--muted); }

/* Honours */
.honours { list-style: none; }
.honours li { display: flex; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.honours li:last-child { border-bottom: 0; }
.h-what { font-weight: 500; }
.h-where { color: var(--muted); font-size: 14.5px; }

/* Education */
.edu { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: baseline; }
.edu h3 { font: 500 22px/1.3 var(--serif); margin-bottom: 4px; }
.edu p { color: var(--muted); }

/* Contact */
.contact { padding-top: 88px; padding-bottom: 72px; text-align: center; }
.contact h2 { font: 500 clamp(36px, 5vw, 52px)/1.1 var(--serif); letter-spacing: -0.015em; margin-bottom: 14px; }
.contact p { color: var(--muted); max-width: 34em; margin: 0 auto 24px; }
.contact-mail {
  display: inline-block; font: 500 clamp(17px, 2.4vw, 22px)/1.3 var(--mono); color: var(--accent-ink);
  text-decoration: none; border-bottom: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); padding-bottom: 4px;
  word-break: break-all;
}
.contact-mail:hover { border-bottom-color: var(--accent); }
.contact-links { list-style: none; display: flex; justify-content: center; gap: 22px; margin-top: 26px; }
.contact-links a { color: var(--muted); font-size: 14.5px; }

.footer { display: flex; justify-content: space-between; gap: 16px; padding-top: 22px; padding-bottom: 32px;
  background: linear-gradient(var(--line), var(--line)) top center / calc(100% - 2 * var(--gutter)) 1px no-repeat; color: var(--faint); font-size: 13px; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 56px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { padding-left: 0; border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
  .section { grid-template-columns: 1fr; gap: 20px; padding-top: 44px; padding-bottom: 44px; }
  .section-label { position: static; padding-top: 0; }
}

@media (max-width: 680px) {
  .wrap { --gutter: 16px; }
  .nav { display: none; }
  .theme-toggle { margin-left: auto; }
  .cards { grid-template-columns: 1fr; }
  .more li { grid-template-columns: 1fr; gap: 4px; }
  .skills div { grid-template-columns: 1fr; gap: 2px; }
  .signal-body div { grid-template-columns: 1fr; gap: 0; padding: 4px 0; }
  .paper { padding: 18px; }
  .card { padding: 18px; }
  .org-note { display: block; margin: 4px 0 0; }
  .stat { padding-right: 12px; }
  .stat + .stat { padding-left: 12px; }
  .stat:nth-child(3) { padding-left: 0; }
  .stat-num { font-size: 23px; }
  .footer { flex-direction: column; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card { transition: none; }
}