:root {
  --bg: #050505;
  --text: #eef2f6;
  --muted: #b6bec8;
  --muted-2: #8e98a5;
  --line: #66727f;
  --line-soft: rgba(180, 192, 205, 0.24);
  --accent: #9fb7d6;
  --accent-strong: #c9dcf4;
  --button: #17202b;
  --button-border: #3d4b5c;
  --max: 1120px;
  --sticky-offset: 128px;
}

html[data-theme="light"] {
  --bg: #ffffff;
  --text: #202832;
  --muted: #596675;
  --muted-2: #74808c;
  --line: #7d8793;
  --line-soft: rgba(89, 102, 117, 0.25);
  --accent: #3f5f86;
  --accent-strong: #223e5f;
  --button: #ffffff;
  --button-border: #c3ccd7;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.52 "Source Sans 3", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-color: var(--accent);
  text-underline-offset: 0.18em;
}

a:hover { color: var(--accent-strong); }

.site {
  width: min(var(--max), calc(100% - 52px));
  margin: 0 auto;
  padding: 46px 0 36px;
}

.top-rule,
.bottom-rule { border-top: 2px solid var(--line); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0 16px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: "Libre Baskerville", Georgia, "Times New Roman", serif;
  font-size: clamp(1.85rem, 3vw, 2.45rem);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-decoration: none;
}

nav {
  display: flex;
  align-items: center;
  gap: 17px;
  font-weight: 700;
  white-space: nowrap;
  font-size: 0.98rem;
}

nav a {
  text-decoration: none;
  border-bottom: 2px solid transparent;
  line-height: 1.25;
}

nav a:hover,
nav a:focus { border-bottom-color: currentColor; }

.theme-toggle {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  border: 1px solid var(--button-border);
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  padding: 0;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.theme-svg {
  width: 15px;
  height: 15px;
  display: block;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

main {
  padding-top: 22px;
  scroll-margin-top: var(--sticky-offset);
}

.hero {
  display: grid;
  grid-template-columns: 245px 1fr;
  gap: 38px;
  align-items: start;
  padding: 10px 0 30px;
}

.portrait {
  width: 188px;
  aspect-ratio: 1 / 1;
  border-radius: 999px;
  object-fit: cover;
  border: 1px solid var(--button-border);
  background: var(--button);
  display: block;
  margin-bottom: 14px;
}

.identity p {
  margin: 0.12rem 0;
  color: var(--text);
}

.identity .muted { color: var(--muted); }

.socials {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.icon-btn {
  width: 38px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--button-border);
  border-radius: 12px;
  background: var(--button);
  text-decoration: none;
  color: var(--text);
  font-size: 18px;
}

.icon-btn:hover {
  color: var(--accent-strong);
  border-color: var(--accent);
}

.bio {
  max-width: 780px;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.58;
  margin: 0 0 20px;
}

.research-block {
  max-width: 820px;
  margin-top: 18px;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 11px;
  margin: 0 0 10px;
  color: var(--text);
  font-family: "Libre Baskerville", Georgia, "Times New Roman", serif;
  font-size: 0.8rem;
  font-style: italic;
  font-weight: 700;
}

.section-label::before,
.section-label::after {
  content: "";
  height: 1px;
  border-top: 1px dashed var(--line-soft);
  flex: 1;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.research-card {
  padding: 14px 15px 15px;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  min-height: 106px;
}

.research-card:nth-child(2n) { border-right: 0; }
.research-card:nth-last-child(-n + 1) { border-bottom: 0; }
.research-card:nth-child(3) { border-bottom: 0; }

.research-card h3 {
  font-family: "Source Sans 3", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  margin: 0 0 8px;
  line-height: 1.35;
  font-weight: 800;
}

.topic-line {
  margin: 0;
  color: var(--muted);
}

.section {
  border-top: 1px solid var(--line);
  padding: 18px 0 26px;
  scroll-margin-top: var(--sticky-offset);
}

h2 {
  font-family: "Libre Baskerville", Georgia, "Times New Roman", serif;
  font-size: 1.28rem;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
}

.section-note {
  color: var(--muted);
  max-width: 820px;
  margin: -4px 0 16px;
}

.pub-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 15px;
}

.publication-note {
  color: var(--muted-2);
  font-size: 0.84rem;
  margin: -6px 0 12px;
}

.publication-note:empty { display: none; }

.filter-btn,
.small-btn,
.pub-action {
  border: 1px solid var(--button-border);
  border-radius: 999px;
  padding: 4px 10px;
  background: var(--button);
  color: var(--text);
  font: inherit;
  font-size: 0.84rem;
  cursor: pointer;
  text-decoration: none;
}

.filter-btn.is-active,
.filter-btn:hover,
.small-btn:hover,
.pub-action:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.pub-year {
  display: grid;
  grid-template-columns: 74px 1fr;
  column-gap: 18px;
  margin: 0 0 22px;
}

.year-label {
  color: var(--muted-2);
  font-weight: 800;
  font-size: 1rem;
}

.pub-list { display: grid; gap: 24px; }

.pub-item { scroll-margin-top: var(--sticky-offset); }

.pub-title {
  margin: 0 0 4px;
  font-weight: 800;
  line-height: 1.32;
  font-size: 1.01rem;
}

.pub-title a { text-decoration: none; }

.pub-title a:hover { color: var(--accent-strong); }

.pub-item {
  border-radius: 12px;
  padding: 8px 10px;
  margin: -8px -10px;
  transition: box-shadow 220ms ease, background 220ms ease;
}

.pub-item.is-highlighted {
  animation: softPublicationFlash 1.85s ease-out 1;
}

@keyframes softPublicationFlash {
  0% { box-shadow: 0 0 0 0 rgba(255,255,255,0); background: transparent; }
  18% { box-shadow: 0 0 0 1px rgba(255,255,255,0.82), 0 0 20px rgba(255,255,255,0.18); background: rgba(255,255,255,0.035); }
  70% { box-shadow: 0 0 0 1px rgba(255,255,255,0.55), 0 0 14px rgba(255,255,255,0.10); background: rgba(255,255,255,0.022); }
  100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); background: transparent; }
}

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

.authors strong { color: var(--text); }

.equal-marker {
  color: inherit;
  font-size: 0.72em;
  line-height: 0;
  margin-left: 1px;
  vertical-align: super;
}

.pub-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 8px;
}

.awards,
.plain-list {
  display: grid;
  gap: 13px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.plain-item {
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 12px;
}

.plain-item:last-child { border-bottom: 0; }

.award-item { padding-bottom: 8px; }

.item-title {
  display: block;
  font-weight: 800;
  line-height: 1.35;
}

.item-meta {
  display: block;
  color: var(--muted);
  margin-top: 3px;
}

.course {
  margin: 0 0 23px;
}

.course h3 {
  font-family: "Libre Baskerville", Georgia, "Times New Roman", serif;
  font-size: 1rem;
  line-height: 1.3;
  margin: 0 0 5px;
  letter-spacing: -0.015em;
}

.course ul {
  margin: 0;
  padding-left: 23px;
  color: var(--text);
}

.course li { margin: 2px 0; }

.status {
  color: var(--muted-2);
  font-size: 0.84rem;
  margin-top: 8px;
}

@media (max-width: 820px) {
  :root { --sticky-offset: 164px; }
  .site { width: min(100% - 28px, var(--max)); padding-top: 28px; }
  header { align-items: flex-start; flex-direction: column; }
  nav { flex-wrap: wrap; gap: 12px 16px; }
  .hero { grid-template-columns: 1fr; gap: 22px; }
  .portrait { width: 148px; }
  .research-grid { grid-template-columns: 1fr; }
  .research-card,
  .research-card:nth-child(2n),
  .research-card:nth-last-child(-n + 1),
  .research-card:nth-child(3) {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }
  .research-card:last-child { border-bottom: 0; }
  .pub-year { grid-template-columns: 1fr; row-gap: 8px; }
}