:root {
  --bg: #f5f5f4;
  --card: #ffffff;
  --text: #1c1917;
  --text-muted: #78716c;
  --border: #e7e5e4;
  --accent: #475569;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, "Noto Sans", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

h1,
h2,
h3 {
  font-family: "Source Serif 4", "Noto Serif", Georgia, serif;
  line-height: 1.25;
  margin: 0 0 0.5rem;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1040px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(4px);
  background: color-mix(in srgb, var(--bg), white 35%);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 0;
}

.brand {
  font-weight: 700;
  color: var(--text);
}

nav a {
  margin-left: 1rem;
  color: var(--text-muted);
}

.hero {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2rem;
  align-items: center;
  padding: 4.5rem 0 2.5rem;
}

.hero-copy {
  min-width: 0;
}

.hero-photo-frame {
  width: clamp(9.5rem, 18vw, 13.5rem);
  aspect-ratio: 1;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--card);
}

.hero-photo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.eyebrow {
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

h1 {
  font-size: clamp(2rem, 3.2vw, 3rem);
}

.subtitle {
  max-width: 760px;
  color: #44403c;
}

.hero-contact,
.profile-links {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
}

.profile-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.profile-link {
  display: inline-flex;
  gap: 0.35rem;
  min-height: 2rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  padding: 0.2rem 0.65rem;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
}

.profile-link svg {
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
  fill: currentColor;
}

.profile-link span {
  color: var(--text);
}

.profile-link:hover {
  color: var(--text);
  text-decoration: none;
}

.profile-link-scholar svg {
  color: #4285f4;
}

.profile-link-linkedin svg {
  color: #0a66c2;
}

.profile-link-github svg {
  color: #24292f;
}

.profile-link-cv svg {
  color: #57534e;
}

.btn {
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border);
}

.btn-solid {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.btn-outline {
  background: var(--card);
}

.section {
  padding: 2rem 0;
  scroll-margin-top: 5rem;
}

.research-interests {
  margin-top: 1rem;
}

.keywords {
  margin: 0;
  padding-left: 0;
  list-style: none;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.keywords li {
  font-size: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  color: var(--text-muted);
}

.about-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
}

.about-column h3 {
  font-family: Inter, "Noto Sans", system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.timeline-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline-list li {
  display: grid;
  grid-template-columns: 1.1rem minmax(0, 1fr);
  gap: 0.7rem;
  position: relative;
  padding-bottom: 1rem;
}

.timeline-list li:first-child {
  padding-top: 0;
}

.timeline-list li:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 1.05rem;
  bottom: -0.05rem;
  width: 1px;
  background: var(--border);
}

.timeline-list li:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  width: 0.7rem;
  height: 0.7rem;
  margin-top: 0.4rem;
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: var(--bg);
}

.timeline-entry {
  display: grid;
  gap: 0.12rem;
}

.timeline-entry a {
  color: var(--text);
  font-weight: 700;
}

.timeline-role {
  color: var(--text-muted);
  font-size: 0.94rem;
}

.timeline-date {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.section p {
  max-width: 980px;
}

.pub-card {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 1rem;
  align-items: start;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.pub-card + .pub-card {
  margin-top: 1rem;
}

.pub-figure {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
}

.authors,
.venue {
  margin: 0.35rem 0;
  color: var(--text-muted);
}

.venue {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.badge {
  display: inline-block;
  background: #f1f5f9;
  border: 1px solid #dbe4ed;
  padding: 0.16rem 0.55rem;
  border-radius: 999px;
  font-size: 0.9rem;
}

.tag {
  display: inline-block;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: #525252;
  font-size: 0.84rem;
  padding: 0.12rem 0.5rem;
}

.tag-red {
  background: #fff1f2;
  border-color: #fecdd3;
  color: #9f1239;
}

.tag-orange {
  background: #fff7ed;
  border-color: #fed7aa;
  color: #9a3412;
}

.tag-purple {
  background: #fdf2f8;
  border-color: #fbcfe8;
  color: #a21caf;
}

.links {
  margin-top: 0.7rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.links a,
.links button,
.disabled-link {
  color: var(--accent);
  border: 1px solid var(--border);
  background: #fafafa;
  border-radius: 6px;
  padding: 0.2rem 0.6rem;
  font: inherit;
  font-size: 0.9rem;
  line-height: inherit;
  cursor: pointer;
}

.disabled-link {
  color: var(--accent);
  cursor: pointer;
  user-select: none;
}

.links button:hover {
  text-decoration: underline;
}

.publication-list {
  margin: 0.7rem 0 0;
  padding-left: 1.4rem;
}

.publication-list li {
  margin-bottom: 0.55rem;
}

.bibtex-dialog {
  width: min(720px, 92vw);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  color: var(--text);
  background: var(--card);
  box-shadow: 0 22px 70px rgb(0 0 0 / 0.18);
}

.bibtex-dialog::backdrop {
  background: rgb(28 25 23 / 0.28);
}

.bibtex-dialog-head,
.bibtex-dialog-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.bibtex-dialog h2 {
  margin: 0;
}

.dialog-close {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: #fafafa;
  color: var(--text-muted);
  cursor: pointer;
  font: inherit;
  line-height: 1;
}

.bibtex-dialog pre {
  max-height: 48vh;
  overflow: auto;
  white-space: pre-wrap;
  margin: 1rem 0;
  padding: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #f8fafc;
  color: #292524;
  font-size: 0.88rem;
  line-height: 1.5;
}

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .hero-photo-frame {
    width: 9rem;
  }

  .pub-card {
    grid-template-columns: 1fr;
  }

  .pub-figure {
    height: auto;
  }

  nav {
    display: none;
  }
}

@media (max-width: 560px) {
  .about-columns {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}