:root {
  color-scheme: light;
  --bg: #f9f8f6;
  --surface: #ffffff;
  --ink: #171717;
  --muted: #585858;
  --soft: #f1efeb;
  --line: rgba(0, 0, 0, 0.08);
  --accent: #2f6fdd;
  --accent-dark: #1d4f9a;
  --amber: #9a6417;
  --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.035);
  --shadow-hover: 0 14px 44px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.hero-bio a,
.section-header p a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: #111111;
  font-family: Newsreader, Georgia, serif;
  letter-spacing: 0;
}

.container {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
  padding: 15px 0;
}

.brand {
  color: var(--ink);
  font-weight: 800;
  white-space: nowrap;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px 24px;
  font-size: 0.95rem;
}

.nav a {
  color: #444444;
  font-weight: 600;
}

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

.lang-link {
  padding: 2px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.hero {
  display: flex;
  align-items: center;
  gap: 56px;
  min-height: 680px;
  padding: 72px 0 82px;
}

.hero-text {
  flex: 1.5;
}

.hero-subtitle {
  display: block;
  margin-bottom: 14px;
  color: #666666;
  font-size: 1.1rem;
  font-weight: 600;
}

.hero h1 {
  margin-bottom: 18px;
  font-size: 4.05rem;
  line-height: 1.05;
}

.hero-bio {
  max-width: 690px;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 1.02rem;
}

.highlight {
  display: inline;
  padding: 0 0.16em;
  border-radius: 4px;
  background: rgba(47, 111, 221, 0.1);
  color: #182848;
  font-weight: 850;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.hero-metrics span {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  min-height: 38px;
  padding: 6px 12px;
  border: 1px solid rgba(47, 111, 221, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  color: #4c5665;
  font-size: 0.86rem;
  font-weight: 720;
  box-shadow: 0 3px 14px rgba(20, 26, 32, 0.035);
}

.hero-metrics strong {
  color: var(--accent-dark);
  font-size: 1.04rem;
  font-weight: 850;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid #dddddd;
  border-radius: 8px;
  background: var(--surface);
  color: #333333;
  font-size: 0.92rem;
  font-weight: 750;
}

.button.primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #ffffff;
}

.button:hover {
  border-color: #333333;
  transform: translateY(-2px);
}

.button.primary:hover {
  background: #333333;
}

.hero-image {
  flex: 1;
  max-width: 330px;
  margin: 0;
  border: 4px solid #ffffff;
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow-hover);
  overflow: hidden;
}

.hero-image img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.research-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  max-width: none;
  text-align: left;
}

.research-copy {
  flex: 1;
  min-width: 0;
}

.research-copy h2 {
  margin-bottom: 10px;
}

.section {
  margin-bottom: 96px;
  scroll-margin-top: 88px;
}

.section-header {
  max-width: 760px;
  margin: 0 auto 38px;
  text-align: center;
}

.section-header.split {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  max-width: none;
  text-align: left;
}

.section-header h2 {
  margin-bottom: 10px;
  font-size: 2.7rem;
  line-height: 1.1;
}

.section-header p {
  margin-bottom: 0;
  color: #666666;
  font-size: 1rem;
}

.section-action,
.pillar-link {
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 800;
  white-space: nowrap;
}

.pillar-status {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 10px;
  border: 1px solid rgba(0, 0, 0, 0.07);
  border-radius: 999px;
  background: #f6f5f2;
  color: #6a6f77;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.section-action:hover,
.pillar-link:hover {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 24px;
}

.pillar-card {
  min-height: 240px;
  padding: 32px 24px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.pillar-card:hover,
.paper-card:hover,
.experience-list article:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.pillar-card h3 {
  margin-bottom: 14px;
  font-size: 1.45rem;
  line-height: 1.2;
}

.pillar-card p {
  margin-bottom: 24px;
  color: #666666;
  font-size: 0.96rem;
}

.news-box,
.experience-list article,
.honors-list {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.news-box {
  padding: 30px;
}

.news-item {
  display: flex;
  gap: 22px;
  padding: 16px 0;
  border-bottom: 1px solid #eeeeee;
}

.news-item:first-child {
  padding-top: 0;
}

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

.news-date {
  flex: 0 0 96px;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 850;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.news-content {
  color: #444444;
  font-size: 0.96rem;
}

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

.paper-card {
  display: flex;
  min-height: 204px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  scroll-margin-top: 96px;
}

.card-thumb {
  display: flex;
  flex: 0 0 380px;
  align-items: center;
  justify-content: center;
  min-height: 228px;
  padding: 18px;
  border-right: 1px solid #eeeeee;
  background: #ffffff;
  color: #ffffff;
  text-align: center;
}

.card-thumb img {
  display: block;
  width: 100%;
  height: 190px;
  object-fit: contain;
}

.card-thumb span {
  display: block;
  font-family: Newsreader, Georgia, serif;
  font-size: 1.55rem;
  font-weight: 850;
  line-height: 1.12;
}

.tone-blue {
  background: #315f9d;
}

.tone-purple {
  background: #6a4f8f;
}

.tone-slate {
  background: #45515f;
}

.tone-green {
  background: #3f6f4b;
}

.tone-amber {
  background: #9a6417;
}

.tone-rose {
  background: #9b4a5a;
}

.default-thumb {
  background: #f7f4ee;
}

.card-content {
  flex: 1;
  min-width: 0;
  padding: 24px 26px;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 16px;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.focus-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  margin: 0 0 8px;
  font-size: 0.78rem;
  line-height: 1.4;
}

.focus-line span {
  color: #777777;
  font-weight: 850;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.focus-line a {
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(47, 111, 221, 0.1);
  color: var(--accent-dark);
  font-weight: 850;
}

.paper-card h3 {
  margin-bottom: 8px;
  font-size: 1.32rem;
  line-height: 1.24;
}

.authors {
  margin-bottom: 8px;
  color: #3b414d;
  font-size: 0.94rem;
  line-height: 1.5;
}

.paper-desc {
  margin-bottom: 0;
  color: #555555;
  font-size: 0.95rem;
  line-height: 1.52;
}

.paper-desc strong,
.experience-list strong,
.pillar-card strong {
  color: #222222;
  font-weight: 850;
}

.me {
  display: inline;
  padding: 1px 4px;
  border-radius: 5px;
  background: #fff0d7;
  color: var(--ink);
  font-weight: 850;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
}

.pub-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 28px;
  padding: 4px 10px 4px 6px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 760;
  line-height: 1;
  letter-spacing: 0;
  box-shadow: 0 1px 0 rgba(20, 26, 32, 0.04);
}

.pub-links a:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(20, 26, 32, 0.09);
}

.pub-links a::before {
  display: inline-grid;
  min-width: 24px;
  height: 18px;
  padding: 0 4px;
  place-items: center;
  border-radius: 999px;
  color: #ffffff;
  font-size: 0.58rem;
  font-weight: 850;
  line-height: 1;
  letter-spacing: 0;
}

.pub-links .link-paper {
  color: #245fb5;
  background: #eef5ff;
}

.pub-links .link-paper::before {
  content: "PDF";
  background: #245fb5;
}

.pub-links .link-code {
  color: #7a5b00;
  background: #fff8de;
}

.pub-links .link-code::before {
  content: "</>";
  background: #7a5b00;
}

.pub-links .link-data {
  color: #1b7358;
  background: #eefaf5;
}

.pub-links .link-data::before {
  content: "DB";
  background: #1b7358;
}

.pub-links .link-demo {
  color: #9a5420;
  background: #fff3e9;
}

.pub-links .link-demo::before {
  content: "RUN";
  background: #9a5420;
}

.pub-links .link-model {
  color: #7047a4;
  background: #f6f0ff;
}

.pub-links .link-model::before {
  content: "AI";
  background: #7047a4;
}

.pub-links .link-leaderboard {
  color: #9a405d;
  background: #fff0f5;
}

.pub-links .link-leaderboard::before {
  content: "#";
  background: #9a405d;
}

.experience-list {
  display: grid;
  gap: 14px;
}

.experience-groups {
  display: grid;
  gap: 42px;
}

.experience-group {
  scroll-margin-top: 96px;
}

.experience-group-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 1.55rem;
  line-height: 1.2;
}

.experience-group-title span {
  display: inline-grid;
  min-width: 36px;
  height: 26px;
  place-items: center;
  border-radius: 999px;
  background: rgba(47, 111, 221, 0.1);
  color: var(--accent-dark);
  font-family: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.04em;
}

.experience-list article {
  padding: 22px 24px;
}

.row-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 8px;
}

.row-heading h3 {
  margin: 0;
  font-size: 1.32rem;
}

.row-heading span {
  flex: none;
  color: #666666;
  font-weight: 750;
}

.experience-list p {
  margin-bottom: 0;
  color: #555555;
}

.honors-list {
  display: grid;
  gap: 0;
  padding: 0;
  margin: 0;
  list-style: none;
}

.honors-list li {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 22px;
  border-bottom: 1px solid #eeeeee;
}

.honors-list li:last-child {
  border-bottom: 0;
}

.honors-list time {
  color: #666666;
  font-weight: 750;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
  padding: 30px 0 44px;
  border-top: 1px solid var(--line);
  color: #666666;
  font-size: 0.92rem;
}

@media (max-width: 900px) {
  .nav-shell {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero {
    align-items: flex-start;
    flex-direction: column;
    min-height: auto;
    padding: 58px 0 72px;
  }

  .hero h1 {
    font-size: 3.2rem;
  }

  .hero-image {
    max-width: 420px;
  }

  .pillars-grid {
    grid-template-columns: 1fr;
  }

  .section-header.split {
    align-items: flex-start;
    flex-direction: column;
  }

  .research-header {
    align-items: center;
    gap: 22px;
  }

  .paper-card {
    flex-direction: column;
  }

  .card-thumb {
    flex: none;
    width: 100%;
    min-height: 190px;
    border-right: 0;
    border-bottom: 1px solid #eeeeee;
  }

  .card-thumb img {
    height: 154px;
  }
}

@media (max-width: 640px) {
  html {
    scroll-padding-top: 164px;
  }

  .container,
  .nav-shell,
  .footer {
    width: min(100% - 28px, 1100px);
  }

  .hero h1 {
    font-size: 2.7rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-bio {
    font-size: 1rem;
  }

  .section {
    margin-bottom: 70px;
    scroll-margin-top: 0;
  }

  .experience-groups {
    gap: 34px;
  }

  .experience-group-title {
    font-size: 1.38rem;
  }

  .paper-card {
    scroll-margin-top: 0;
  }

  .section-header h2 {
    font-size: 2.15rem;
  }

  .research-header {
    gap: 14px;
  }

  .news-item,
  .row-heading,
  .honors-list li {
    display: grid;
    grid-template-columns: 1fr;
  }

  .news-date,
  .row-heading span,
  .honors-list time {
    justify-self: start;
  }

  .card-content,
  .news-box,
  .experience-list article,
  .honors-list li {
    padding-left: 18px;
    padding-right: 18px;
  }
}