:root {
  --bg: #ffffff;
  --bg-alt: #f7f8fa;
  --text: #2b2b2b;
  --muted: #6b7280;
  --heading: #111827;
  --accent: #1565c0;
  --accent-soft: #e3effc;
  --border: #e5e7eb;
  --figure-bg: #ffffff;
  --badge-bg: #fff4d6;
  --badge-text: #7a5300;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a;
    --bg-alt: #1b1e23;
    --text: #d6d8dc;
    --muted: #9aa1ab;
    --heading: #f3f4f6;
    --accent: #6aaeff;
    --accent-soft: #1d2a3b;
    --border: #2c3038;
    --figure-bg: #f4f5f7;
    --badge-bg: #3a2f12;
    --badge-text: #ffd479;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

:root[data-theme="dark"] {
  --bg: #14161a;
  --bg-alt: #1b1e23;
  --text: #d6d8dc;
  --muted: #9aa1ab;
  --heading: #f3f4f6;
  --accent: #6aaeff;
  --accent-soft: #1d2a3b;
  --border: #2c3038;
  --figure-bg: #f4f5f7;
  --badge-bg: #3a2f12;
  --badge-text: #ffd479;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .brand {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--heading);
  letter-spacing: -0.02em;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand { font-weight: 700; font-size: 1.15rem; color: var(--heading); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--text); font-size: 0.95rem; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }
.theme-toggle {
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
}

/* Sections */
section { padding: 72px 0; }
section.alt { background: var(--bg-alt); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 { font-size: 2rem; margin: 0; }
.section-head p { color: var(--muted); margin: 6px 0 0; }

/* About */
.about { display: grid; grid-template-columns: 300px 1fr; gap: 56px; align-items: start; }
.profile { text-align: center; }
.avatar {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow);
}
.profile h1 { font-size: 1.7rem; margin: 18px 0 4px; }
.profile .role { margin: 0; color: var(--text); }
.profile .org { margin: 2px 0 14px; }
.socials { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; font-size: 1.35rem; }
.socials a { color: var(--muted); }
.socials a:hover { color: var(--accent); text-decoration: none; }

.bio h2 { font-size: 1.7rem; margin: 0 0 16px; }
.bio p { margin: 0 0 16px; }
.bio .tagline { color: var(--muted); margin-top: 22px; }
.facts { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 26px; }
.facts h3 { font-size: 1.05rem; margin: 0 0 8px; }
.facts ul { list-style: none; padding: 0; margin: 0; font-size: 0.95rem; }
.facts li { display: flex; gap: 10px; margin-bottom: 8px; }
.facts li i { color: var(--muted); width: 18px; padding-top: 5px; flex-shrink: 0; }
.facts .sub { color: var(--muted); display: block; font-size: 0.88rem; }

/* Research / hackathon cards */
.items { display: flex; flex-direction: column; gap: 28px; }
.item {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 32px;
  align-items: center;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.item:last-child { border-bottom: none; }
.thumb {
  display: block;
  aspect-ratio: 16 / 10;
  border-radius: 8px;
  overflow: hidden;
  background: var(--figure-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.thumb img { width: 100%; height: 100%; object-fit: contain; display: block; transition: transform 0.25s; }
.thumb.cover img { object-fit: cover; }
.thumb:hover img { transform: scale(1.03); }
.item h3 { font-size: 1.2rem; margin: 0 0 6px; line-height: 1.4; }
.item h3 a { color: var(--heading); }
.item h3 a:hover { color: var(--accent); text-decoration: none; }
.venue { font-style: italic; color: var(--muted); margin: 0 0 4px; font-size: 0.95rem; }
.authors { font-size: 0.9rem; color: var(--muted); margin: 0 0 8px; }
.authors b { color: var(--text); }
.item .summary { margin: 0 0 12px; font-size: 0.97rem; }
.badge {
  display: inline-block;
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}
.buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  padding: 4px 12px;
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--accent);
}
.btn:hover { background: var(--accent); color: var(--bg); text-decoration: none; }

/* Filterable publication list */
.filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 36px;
}
.filter {
  font-family: inherit;
  font-size: 0.82rem;
  color: var(--muted);
  background: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.filter:hover { color: var(--accent); border-color: var(--accent); }
.filter.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.pubs { display: flex; flex-direction: column; gap: 28px; }
/* An author `display` would otherwise beat the UA rule for [hidden]. */
.pub[hidden],
.more-wrap[hidden] { display: none; }
.pub {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 32px;
  align-items: center;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.pub:last-child { border-bottom: none; padding-bottom: 0; }
.pub-body { order: 2; }
.pub-body h3 { font-size: 1.2rem; margin: 0 0 6px; line-height: 1.4; }
.pub-body h3 a { color: var(--heading); }
.pub-body h3 a:hover { color: var(--accent); text-decoration: none; }
.pub-body .summary { margin: 0 0 12px; font-size: 0.97rem; }
.pub-thumb {
  order: 1;
  display: block;
  aspect-ratio: 16 / 10;
  border-radius: 8px;
  overflow: hidden;
  background: var(--figure-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.pub-thumb img { width: 100%; height: 100%; object-fit: contain; display: block; transition: transform 0.25s; }
.pub-thumb.cover img { object-fit: cover; }
.pub-thumb:hover img { transform: scale(1.03); }
.empty { text-align: center; color: var(--muted); padding: 24px 0; }

.more-wrap { text-align: center; margin-top: 36px; }
.more-btn {
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--accent);
  background: none;
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 8px 22px;
  cursor: pointer;
}
.more-btn:hover { background: var(--accent); color: var(--bg); }

/* Experience timeline */
.timeline { max-width: 820px; margin: 0 auto; position: relative; }
.timeline::before {
  content: "";
  position: absolute;
  left: 55px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--border);
}
.job { position: relative; padding-left: 136px; margin-bottom: 36px; }
.job-logo {
  position: absolute;
  left: 0;
  top: 2px;
  width: 104px;
  height: 56px;
  object-fit: contain;
  object-position: center;
}

/* Most marks are dark artwork on transparency, so they need a light
   surface once the page itself goes dark. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .job-logo {
    background: #fff;
    border-radius: 8px;
    padding: 6px 8px;
  }
}
:root[data-theme="dark"] .job-logo {
  background: #fff;
  border-radius: 8px;
  padding: 6px 8px;
}
.job h3 { font-size: 1.08rem; margin: 0; }
.job .meta { color: var(--muted); font-size: 0.9rem; margin: 2px 0 6px; }
.job ul { margin: 0; padding-left: 18px; font-size: 0.95rem; }
.job li { margin-bottom: 4px; }

/* Contact / footer */
.contact { text-align: center; }
.contact p { margin: 6px 0; }

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  padding: 11px 26px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
}
.contact-link:hover { background: var(--accent); color: var(--bg); text-decoration: none; }

footer { text-align: center; color: var(--muted); font-size: 0.85rem; padding: 28px 0 40px; border-top: 1px solid var(--border); }

@media (max-width: 860px) {
  .about { grid-template-columns: 1fr; gap: 32px; }
  .item { grid-template-columns: 1fr; gap: 16px; }
  .pub { grid-template-columns: 1fr; gap: 16px; }
  .nav-links a.hide-sm { display: none; }
  section { padding: 52px 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 0.88rem; }
  .brand { font-size: 1rem; }
  .section-head h2 { font-size: 1.6rem; }
}