:root {
  --bg: #faf9f6;
  --bg-card: #ffffff;
  --text: #1b1f23;
  --text-muted: #5b6570;
  --accent: #1f7a6c;
  --accent-dark: #17604f;
  --accent-soft: #e4f2ee;
  --accent-2: #c96f4a;
  --line: #e3e1da;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  --maxw: 760px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

section, .nav-inner, footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

section { padding-top: 64px; padding-bottom: 64px; scroll-margin-top: 64px; }
section + section { border-top: 1px solid var(--line); }

/* Nav */
nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  padding-top: 14px;
  padding-bottom: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.nav-name {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.87rem;
}
.nav-links a.active,
.nav-links a:hover { color: var(--accent); }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  padding: 7px 14px;
  border-radius: 5px;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { background: var(--accent-dark); }

/* Sequence-track divider */
.track {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 18px;
  opacity: 0.55;
}
.track span {
  display: block;
  width: 3px;
  background: var(--accent);
  border-radius: 1px;
}

.eyebrow {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: var(--accent);
  margin: 0 0 18px 0;
}

h1 {
  font-size: 2.3rem;
  line-height: 1.15;
  margin: 0 0 8px 0;
  letter-spacing: -0.01em;
}
h2 { font-size: 1.4rem; margin: 0 0 4px 0; }
.subtitle { font-size: 1.08rem; color: var(--text-muted); margin: 0 0 20px 0; }
.tagline { font-size: 1.02rem; max-width: 560px; }

#hero { padding-top: 76px; padding-bottom: 48px; border-top: none; }

.hero-links { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 6px 12px;
  border-radius: 5px;
}
.hero-links a:hover { border-color: var(--accent); color: var(--accent); }

p { color: var(--text); margin: 0 0 14px 0; }
p:last-child { margin-bottom: 0; }
.muted { color: var(--text-muted); }

/* Experience */
.job {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 24px 26px;
  margin-bottom: 18px;
}
.job:last-child { margin-bottom: 0; }
.job-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 4px;
}
.job-title { font-weight: 600; font-size: 1.03rem; }
.job-date { font-family: var(--mono); font-size: 0.78rem; color: var(--text-muted); white-space: nowrap; }
.job-sub { color: var(--accent); font-size: 0.88rem; margin-bottom: 14px; }
ul.bullets { margin: 0; padding-left: 18px; }
ul.bullets li { margin-bottom: 8px; font-size: 0.95rem; }
ul.bullets li:last-child { margin-bottom: 0; }
ul.bullets strong { font-weight: 600; }

/* Skills */
.tag-group { margin-bottom: 18px; }
.tag-group:last-child { margin-bottom: 0; }
.tag-label { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 8px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--mono);
  font-size: 0.78rem;
  background: var(--accent-soft);
  color: var(--accent-dark);
  padding: 5px 10px;
  border-radius: 5px;
}

/* Research */
.section-note {
  font-size: 0.85rem;
  margin-top: -8px;
  margin-bottom: 22px;
}
.section-note a { color: var(--accent); }
details.pub {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}
details.pub:first-of-type { border-top: none; padding-top: 0; }
details.pub summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}
details.pub summary::-webkit-details-marker { display: none; }
.pub-heading { flex: 1; }
.pub-title { font-weight: 600; font-size: 0.98rem; margin-bottom: 4px; }
.pub-meta { font-size: 0.85rem; color: var(--text-muted); }
.pub-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  background: var(--accent-2);
  color: #fff;
  padding: 2px 7px;
  border-radius: 4px;
  margin-left: 8px;
  vertical-align: middle;
}
.pub-toggle {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  border: 1px solid var(--line);
  border-radius: 4px;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
details.pub[open] .pub-toggle::before { content: "\2212"; }
.pub-toggle::before { content: "+"; }
.pub-body { padding-top: 14px; }
.pub-abstract { font-size: 0.92rem; margin-bottom: 12px; }
.pub-links a {
  font-size: 0.82rem;
  color: var(--accent);
  text-decoration: none;
  margin-right: 14px;
}
.pub-links a:hover { text-decoration: underline; }

/* Education */
.degree { margin-bottom: 22px; }
.degree:last-child { margin-bottom: 0; }
.degree-school { font-weight: 600; font-size: 1rem; }
.degree-name { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 6px; }
.degree-meta { font-size: 0.88rem; }
ul.awards { margin: 6px 0 0 0; padding-left: 18px; }
ul.awards li { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 4px; }
ul.awards li:last-child { margin-bottom: 0; }

footer {
  padding-top: 40px;
  padding-bottom: 80px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}
footer a { color: var(--text-muted); }
footer a:hover { color: var(--accent); }

@media (max-width: 560px) {
  h1 { font-size: 1.9rem; }
  .job-head { flex-direction: column; }
  .nav-links { gap: 12px; }
}