:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #555555;
  --soft: #f5f5f5;
  --line: #dddddd;
  --accent: #214f7a;
  --max-width: 1080px;
  --sidebar-width: 250px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.68;
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: var(--text);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.nav-links {
  display: flex;
  gap: 22px;
  align-items: center;
  font-size: 0.98rem;
}

.nav-links a {
  color: var(--text);
}

.page-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 52px 26px 72px;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 72px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 92px;
  min-width: 0;
}

.portrait {
  width: 210px;
  max-width: 100%;
  display: block;
  margin: 0 0 26px;
  border-radius: 50% / 42%;
}

.sidebar-name {
  margin: 0 0 12px;
  font-size: 1.45rem;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.sidebar-line {
  margin: 0 0 7px;
  color: var(--text);
  font-size: 0.98rem;
}

.sidebar-links {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.sidebar-links a {
  width: fit-content;
  font-weight: 600;
}

.content {
  min-width: 0;
  max-width: 760px;
}

.section-block {
  margin-bottom: 58px;
}

.intro {
  margin-bottom: 70px;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.24;
  letter-spacing: -0.03em;
}

h1 {
  margin-bottom: 26px;
  font-size: clamp(2.2rem, 4vw, 3.2rem);
}

h2 {
  margin-bottom: 20px;
  font-size: 1.45rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
}

h3 {
  margin-bottom: 6px;
  font-size: 1.08rem;
}

p {
  margin-top: 0;
  margin-bottom: 18px;
}

.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.research-tags span {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #333333;
  font-size: 0.86rem;
  padding: 4px 11px;
}

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

.cv-list > li {
  margin-bottom: 17px;
}

.cv-list.compact > li {
  margin-bottom: 15px;
}

.item-main {
  font-weight: 700;
}

.item-sub,
.paper-meta,
.section-note {
  color: var(--muted);
}

.paper {
  margin-bottom: 34px;
}

.paper p {
  margin-bottom: 11px;
}

.paper-meta {
  margin-bottom: 10px;
  font-size: 0.94rem;
}

.paper-link-row {
  margin-top: 8px;
  font-weight: 700;
}

.two-col-list {
  columns: 1;
}

.footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 26px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 820px) {
  .page-shell {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 36px;
  }

  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    column-gap: 24px;
    align-items: start;
  }

  .portrait {
    width: 140px;
    margin-bottom: 0;
    grid-row: span 5;
  }

  .content {
    max-width: none;
  }
}

@media (max-width: 560px) {
  .top-nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 14px 20px;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px;
  }

  .page-shell {
    padding: 30px 20px 58px;
  }

  .sidebar {
    display: block;
  }

  .portrait {
    width: 185px;
    margin-bottom: 22px;
  }

  h1 {
    font-size: 2.15rem;
  }
}

.job-market-note {
  color: var(--accent);
  font-weight: 750;
  margin-top: -6px;
  margin-bottom: 22px;
}

.paper-abstract {
  text-align: left;
}