:root {
  --blue: #1d4ed8;
  --blue-deep: #12306e;
  --paper: #ffffff;
  --ink: #10203a;
  --body: #33465e;
  --muted: #6b7d94;
  --line: #dbe3ee;
  --line-soft: #eaeff6;
  --font: "Instrument Sans", ui-sans-serif, system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --wrap: 68rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--body);
  font-family: var(--font);
  font-size: 0.975rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-wrap: pretty;
}

a {
  color: var(--blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--ink);
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3 {
  color: var(--ink);
  letter-spacing: -0.02em;
}

.wrap {
  width: min(100% - 2.5rem, var(--wrap));
  margin-inline: auto;
}

/* Top bar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
}

.logo {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}

.topbar nav a {
  color: var(--muted);
  font-size: 0.88rem;
  text-decoration: none;
}

.topbar nav a:hover {
  color: var(--ink);
}

/* Intro */

.intro {
  padding: 2rem 0 1.75rem;
  border-bottom: 1px solid var(--line);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(28rem, 30rem) minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}

.identity {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 1.15rem;
}

.portrait {
  width: 11rem;
  height: 13.75rem;
  border: 1px solid var(--line);
  border-radius: 0.25rem;
  object-fit: cover;
  object-position: center 20%;
}

.identity h1 {
  margin: 0 0 0.2rem;
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.15;
}

.position {
  margin: 0 0 0.7rem;
  color: var(--body);
  font-size: 0.9rem;
  line-height: 1.4;
}

.id-facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.1rem 0.6rem;
  margin: 0 0 0.7rem;
  font-size: 0.82rem;
}

.id-facts dt {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding-top: 0.18rem;
}

.id-facts dd {
  margin: 0;
  color: var(--ink);
}

.id-facts dd a {
  white-space: nowrap;
}

.id-links {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.45rem 0.85rem;
  margin: 0;
  font-size: 0.84rem;
}

.social {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--blue);
  text-decoration: none;
}

.social:hover {
  color: var(--ink);
}

.social-icon {
  width: 1rem;
  height: 1rem;
  flex: none;
}

.about p {
  margin: 0 0 0.7rem;
}

.about p:last-child {
  margin-bottom: 0;
}

.about strong {
  color: var(--ink);
  font-weight: 600;
}

.interests {
  margin-top: 0.9rem !important;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 0.85rem;
}

.interests span {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-right: 0.4rem;
}

/* Sections */

.section {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 3rem;
}

.section h2 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  margin: 0 0 0.9rem;
  font-size: 1.05rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.h2-aside {
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
}

.eq-note {
  margin: 0.9rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.eq-note span,
.eq {
  color: var(--blue);
  font-weight: 600;
}

/* News + courses share the date-column rhythm */

.news,
.courses {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news li,
.courses li {
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr);
  gap: 0.25rem 1rem;
  padding: 0.4rem 0;
  border-top: 1px solid var(--line-soft);
}

.news li:first-child,
.courses li:first-child {
  border-top: 0;
}

.date {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  padding-top: 0.12rem;
}

.news a {
  font-weight: 500;
  text-decoration: none;
}

.news a:hover {
  text-decoration: underline;
}

.place {
  white-space: nowrap;
}

.flag {
  font-style: normal;
}

.courses li {
  padding: 0.65rem 0;
}

.courses h3 {
  margin: 0 0 0.15rem;
  font-size: 0.98rem;
  font-weight: 600;
}

.courses .code {
  margin-left: 0.4rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.06em;
}

.courses p {
  margin: 0;
  font-size: 0.9rem;
}

/* Publications */

.pub {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  gap: 1.25rem;
  padding: 0.95rem 0;
  border-top: 1px solid var(--line-soft);
}

.pub:first-of-type {
  border-top: 0;
}

.pub-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid color-mix(in oklab, var(--blue) 35%, var(--line));
  border-radius: 0.55rem;
  object-fit: cover;
  object-position: center;
  background: #f6f9fd;
  box-shadow: 0 4px 14px rgba(18, 48, 110, 0.1);
}

.pub h3 {
  margin: 0 0 0.2rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.35;
}

.authors {
  margin: 0 0 0.3rem;
  font-size: 0.86rem;
  line-height: 1.45;
}

.authors strong {
  color: var(--ink);
  font-weight: 600;
}

.venue {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  margin: 0 0 0.35rem;
}

.venue-badge {
  padding: 0.1rem 0.45rem;
  border-radius: 0.2rem;
  background: var(--blue);
  color: #fff;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.venue-preprint {
  background: var(--muted);
}

.venue-extra {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.abs {
  margin: 0 0 0.4rem;
  font-size: 0.88rem;
  line-height: 1.55;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.85rem;
  margin: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
}

.links a {
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.links a:hover {
  color: var(--ink);
}

/* Footer */

.foot {
  padding: 1.1rem 0 2rem;
}

.foot-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.35rem 1rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.foot p {
  margin: 0;
}

.foot a {
  color: var(--muted);
  text-decoration: none;
}

.foot a:hover {
  color: var(--blue);
}

/* Responsive */

@media (max-width: 980px) {
  .intro-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .id-links {
    flex-wrap: wrap;
  }
}

@media (max-width: 620px) {
  .identity {
    grid-template-columns: 8rem minmax(0, 1fr);
    gap: 0.85rem;
  }

  .portrait {
    width: 8rem;
    height: 10rem;
  }

  .id-facts dd a {
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .pub {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }

  .pub-thumb {
    max-width: 18rem;
  }

  .news li,
  .courses li {
    grid-template-columns: 1fr;
    gap: 0.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}