/* ---------- Theme tokens ---------- */
:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --border: #e5e7eb;
  --text: #111418;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-h: #1e40af;
  --khu: #9e1b32;
  --live: #16a34a;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px -12px rgba(16, 24, 40, .12);
  --radius: 12px;
  --nav-h: 72px;
  --nav-accent: #7c5cd6;
  --glass-bg: rgba(255, 255, 255, .55);
  --glass-strong: rgba(255, 255, 255, .72);
  --glass-border: rgba(255, 255, 255, .75);
  --glass-edge: rgba(17, 20, 24, .07);
  --glass-hi: rgba(255, 255, 255, .9);
  --glass-shadow: 0 8px 32px -8px rgba(40, 40, 90, .14), 0 1px 2px rgba(16, 24, 40, .05);
  --blob-a: rgba(37, 99, 235, .12);
  --blob-b: rgba(124, 92, 214, .11);
  --blob-c: rgba(236, 120, 160, .08);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;

  --b-neurips: #6d28d9;
  --b-cvprw: #0e7490;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e0f11;
    --surface: #17191c;
    --border: #272a2f;
    --text: #e8eaed;
    --muted: #9aa3ae;
    --accent: #6ea8fe;
    --accent-h: #a5c8ff;
    --khu: #f07a8c;
    --live: #4ade80;
    --nav-accent: #b49cfa;
    --glass-bg: rgba(255, 255, 255, .045);
    --glass-strong: rgba(255, 255, 255, .08);
    --glass-border: rgba(255, 255, 255, .10);
    --glass-edge: rgba(255, 255, 255, .06);
    --glass-hi: rgba(255, 255, 255, .14);
    --glass-shadow: 0 8px 32px -8px rgba(0, 0, 0, .6), 0 1px 2px rgba(0, 0, 0, .3);
    --blob-a: rgba(96, 165, 250, .10);
    --blob-b: rgba(160, 130, 250, .10);
    --blob-c: rgba(240, 122, 160, .06);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0e0f11;
  --surface: #17191c;
  --border: #272a2f;
  --text: #e8eaed;
  --muted: #9aa3ae;
  --accent: #6ea8fe;
  --accent-h: #a5c8ff;
  --khu: #f07a8c;
  --live: #4ade80;
  --nav-accent: #b49cfa;
  --glass-bg: rgba(255, 255, 255, .045);
  --glass-strong: rgba(255, 255, 255, .08);
  --glass-border: rgba(255, 255, 255, .10);
  --glass-edge: rgba(255, 255, 255, .06);
  --glass-hi: rgba(255, 255, 255, .14);
  --glass-shadow: 0 8px 32px -8px rgba(0, 0, 0, .6), 0 1px 2px rgba(0, 0, 0, .3);
  --blob-a: rgba(96, 165, 250, .10);
  --blob-b: rgba(160, 130, 250, .10);
  --blob-c: rgba(240, 122, 160, .06);
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .6);
  color-scheme: dark;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color .25s, color .25s;
}

p { margin: 0; }
a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: var(--accent-h); }
strong, b { font-weight: 600; }

/* Soft colour wash behind the top of the page */
.glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(40vw 32vw at 8% 4%, var(--blob-a), transparent 70%),
    radial-gradient(36vw 30vw at 92% 12%, var(--blob-b), transparent 70%),
    radial-gradient(42vw 34vw at 70% 96%, var(--blob-c), transparent 70%),
    radial-gradient(30vw 26vw at 18% 78%, var(--blob-b), transparent 70%);
  z-index: 0;
}

/* ---------- Layout ---------- */
.page {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 48px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 80px;
  align-items: start;
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: sticky;
  top: var(--nav-h);
  padding: 64px 0 48px;
  text-align: center;
}

.avatar {
  display: block;
  width: 152px;
  height: 192px;
  margin: 0 auto 22px;
  object-fit: cover;
  object-position: center top;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.name {
  margin: 0 0 6px;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.role { font-size: .85rem; color: var(--muted); line-height: 1.55; }

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 16px 0 18px;
  padding: 4px 12px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 0 0 1px var(--glass-edge);
  font-size: .76rem;
  font-weight: 500;
}
.dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--live);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--live) 55%, transparent); }
  70%  { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.icons { display: flex; justify-content: center; gap: 8px; margin-bottom: 12px; }
.icons a {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 9px;
  color: var(--muted);
  transition: color .15s, background .15s, transform .15s;
}
.icons a:hover { color: var(--accent); background: var(--surface); transform: translateY(-2px); }
.icons svg {
  width: 18px; height: 18px;
  fill: none; stroke: currentColor; stroke-width: 1.8;
  stroke-linecap: round; stroke-linejoin: round;
}
.icon-text { font-size: .8rem; font-weight: 700; letter-spacing: .02em; }

.email { font-size: .75rem; color: var(--muted); }

/* ---------- Main ---------- */
.main { padding: 64px 0 64px; min-width: 0; }
section { scroll-margin-top: calc(var(--nav-h) + 24px); }

section { margin-bottom: 64px; }

.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.section-title::before {
  content: "";
  width: 4px; height: 16px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), var(--khu));
}

#about p { font-size: .95rem; line-height: 1.85; }
.lead em { font-style: italic; }
.khu { color: var(--khu); font-weight: 600; }
.khu:hover { color: var(--khu); text-decoration: underline; text-underline-offset: 3px; }

.placeholder {
  font-size: .95rem;
  line-height: 1.85;
  padding: 10px 14px;
  border-left: 3px solid #f59e0b;
  background: color-mix(in srgb, #f59e0b 8%, transparent);
  border-radius: 4px;
}

.lead { font-size: .95rem; line-height: 1.85; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tags span {
  padding: 3px 12px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: var(--glass-bg);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 0 0 1px var(--glass-edge);
  color: var(--muted);
  font-size: .75rem;
  font-weight: 500;
}

/* ---------- Publications ---------- */
.note { font-size: .78rem; color: var(--muted); margin: -6px 0 16px; }

.pub-list { display: flex; flex-direction: column; gap: 8px; }

.pub {
  display: flex;
  gap: 24px;
  padding: 16px;
  margin: 0 -16px;
  border-radius: var(--radius);
  transition: background .2s;
}
.pub:hover {
  background: var(--glass-bg);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 0 0 1px var(--glass-edge);
}

.pub-thumb {
  position: relative;
  flex-shrink: 0;
  width: 220px;
  align-self: flex-start;
}
.pub-thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  transition: transform .25s, box-shadow .25s;
}
.pub:hover .pub-thumb img { transform: translateY(-2px); box-shadow: var(--shadow); }

.badge {
  position: absolute;
  left: 0; bottom: 0;
  padding: 2px 8px;
  border-radius: 0 8px 0 10px;
  color: #fff;
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .02em;
  transition: transform .25s;
}
.pub:hover .badge { transform: translateY(-2px); }
.b-neurips { background: var(--b-neurips); }
.b-cvprw   { background: var(--b-cvprw); }

.pub-body { min-width: 0; padding-top: 2px; }
.pub-title { margin: 0 0 6px; font-size: .95rem; font-weight: 600; line-height: 1.5; }
.pub-title a { color: var(--text); }
.pub-title a:hover { color: var(--accent); }
.pub-authors { font-size: .84rem; color: var(--muted); line-height: 1.55; }
.pub-authors b {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent);
  text-underline-offset: 3px;
}
.pub-venue { font-size: .84rem; color: var(--muted); margin: 2px 0 12px; }
.pub-venue b { color: var(--text); font-weight: 600; }

.pub-links { display: flex; flex-wrap: wrap; gap: 6px; }
.pub-links a {
  padding: 2px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .75rem;
  font-weight: 500;
  background: var(--bg);
  transition: all .15s;
}
.pub-links a:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ---------- Cards (Education / Experience) ---------- */
.cards { display: grid; gap: 14px; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(170%);
  -webkit-backdrop-filter: blur(16px) saturate(170%);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 0 0 1px var(--glass-edge), 0 2px 10px -6px rgba(16, 24, 40, .10);
  color: inherit;
  transition: transform .25s, box-shadow .25s, background .25s;
}
.card:hover {
  transform: translateY(-3px);
  background: var(--glass-strong);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 0 0 1px var(--glass-edge), var(--glass-shadow);
  color: inherit;
}

.logo {
  flex-shrink: 0;
  width: 64px; height: 64px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--border);
  padding: 8px;
}
.logo img, .logo svg { width: 100%; height: 100%; object-fit: contain; }
.logo-emoji { font-size: 2rem; line-height: 1; }

.card-name { font-size: .88rem; font-weight: 600; line-height: 1.4; }
.card-role { font-size: .8rem; color: var(--muted); line-height: 1.45; margin-top: 2px; }
.card-meta { font-size: .74rem; color: var(--muted); margin-top: 4px; font-variant-numeric: tabular-nums; }
.award {
  display: inline-block;
  padding: 0 7px;
  border-radius: 999px;
  background: #fef3c7;
  color: #92400e;
  font-size: .68rem;
  font-weight: 600;
}

/* ---------- Footer ---------- */
footer {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: .75rem;
  color: var(--muted);
}

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .dot { animation: none; }
}

/* ---------- Top navigation bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: center;
  padding-top: 14px;
  pointer-events: none;
}
.topbar-inner {
  position: relative;
  pointer-events: auto;
  height: 48px;
  padding: 0 6px 0 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), inset 0 -1px 0 var(--glass-edge), 0 0 0 1px var(--glass-edge), var(--glass-shadow);
}
/* specular sheen on the upper half of the capsule */
.topbar-inner::before {
  content: "";
  position: absolute;
  inset: 1px 1px 50% 1px;
  border-radius: 999px 999px 40% 40% / 999px 999px 100% 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, .35), transparent);
  pointer-events: none;
  opacity: .7;
}
.nav { position: relative; display: flex; gap: 2px; }
.nav::-webkit-scrollbar { display: none; }
.nav a {
  position: relative;
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: .84rem;
  font-weight: 500;
  white-space: nowrap;
  transition: color .2s, background .2s, box-shadow .2s;
}
.nav a:hover { color: var(--text); }
/* active section: a small glass "lens" with a purple tick */
.nav a.active {
  color: var(--text);
  background: var(--glass-strong);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 0 0 1px var(--glass-edge), 0 2px 8px -4px rgba(60, 40, 140, .25);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 3px;
  width: 14px; height: 2px;
  margin-left: -7px;
  border-radius: 2px;
  background: var(--nav-accent);
  transform: scaleX(0);
  transition: transform .25s ease;
}
.nav a.active::after { transform: scaleX(1); }

.theme-toggle {
  position: relative;
  flex-shrink: 0;
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border: none; border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color .15s, background .2s, transform .3s;
}
.theme-toggle:hover { color: var(--nav-accent); background: var(--glass-strong); transform: rotate(20deg); }
.theme-toggle svg {
  width: 17px; height: 17px;
  fill: none; stroke: currentColor; stroke-width: 1.8;
  stroke-linecap: round; stroke-linejoin: round;
}
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: block; }
  :root:not([data-theme="light"]) .icon-moon { display: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .cards-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .page { grid-template-columns: 1fr; gap: 0; padding: 0 22px; }
  .sidebar { position: static; padding: 40px 0 8px; }
  .main { padding-top: 40px; }
  section { margin-bottom: 52px; }
}

@media (max-width: 600px) {
  .page { padding: 0 18px; }
  .topbar { padding: 10px 10px 0; }
  .topbar-inner { width: 100%; padding: 0 4px 0 6px; gap: 2px; }
  .nav { flex: 1; overflow-x: auto; scrollbar-width: none; }
  .nav a { padding: 6px 10px; font-size: .8rem; }
  .cards-2, .cards-3 { grid-template-columns: 1fr; }
  .pub { flex-direction: column; gap: 12px; }
  .pub-thumb { width: 100%; }
}