:root {
  --background: #ffffff;
  --text: #171717;
  --link: #224b8d;
  --muted: #848484;
  --rule: #e5e5e5;
  --venue: #9f3c48;
  --award: #27a327;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--background);
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: 'Roboto', Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

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

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

.site-shell {
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--background);
  border-bottom: 1px solid var(--rule);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
  max-width: 1160px;
  margin: 0 auto;
  padding: 1.2rem 1.5rem 1rem;
}

.nav-group {
  display: flex;
  gap: clamp(1.1rem, 3.5vw, 2.7rem);
}

.nav-link {
  position: relative;
  flex: 0 0 auto;
  padding: 0.15rem 0;
  color: var(--text);
  font-size: 0.98rem;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: -1.1rem;
  left: 0;
  height: 2px;
  background: var(--link);
}

.home-main {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: clamp(3.75rem, 6vw, 5rem) 1.5rem 6rem;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 600px) 232px;
  align-items: start;
  gap: clamp(3rem, 7vw, 5.5rem);
  width: 100%;
}

.intro-copy {
  max-width: 590px;
}

h1 {
  margin: 0 0 0.55rem;
  font-size: clamp(2rem, 4vw, 2.7rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.018em;
}

h2 {
  margin: 0 0 1.2rem;
  font-size: 1.45rem;
  font-weight: 400;
  line-height: 1.25;
}

.email {
  margin: 0;
  font-size: 1.02rem;
}

.bio {
  margin-top: 2.15rem;
}

.bio p {
  margin: 0;
}

.bio p + p {
  margin-top: 1.4rem;
}

.portrait {
  display: block;
  width: 232px;
  height: 309px;
  margin-top: 0.25rem;
  object-fit: cover;
}

.selected-work {
  max-width: 760px;
  margin-top: 2rem;
}

.selected-work-list .paper-item:last-child {
  margin-bottom: 0;
}

.content-main {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 5.5rem;
}

.content-main.wide {
  max-width: 1160px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.papers-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(300px, 0.9fr);
  gap: clamp(3rem, 6vw, 4.75rem);
}

.paper-list,
.professional-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.paper-item {
  margin: 0 0 1.65rem;
  text-wrap: pretty;
}

.paper-title {
  display: inline;
  font-weight: 600;
  text-wrap: pretty;
}

.venue {
  color: var(--venue);
  font-weight: 600;
}

.award {
  color: var(--award);
  font-weight: 600;
}

.paper-videos {
  margin-top: 0.28rem;
  color: #919191;
}

.paper-videos a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.program-committees {
  margin-top: 2.75rem;
}

.teaching-list {
  margin: 0;
  padding-left: 1.35rem;
}

.teaching-list li + li {
  margin-top: 0.55rem;
}

.section-leader-note {
  margin: 2rem 0 0;
}

.professional-list li {
  margin-bottom: 2rem;
}

.program-committees p {
  margin: 0;
}

.personal-main {
  display: grid;
  place-items: center;
  min-height: calc(100vh - 61px);
  padding: 2rem;
}

.personal-main p {
  margin: 0;
  text-align: center;
}

.personal-status {
  display: inline-block;
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 700px) {
  .site-nav {
    gap: 2.5rem;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .intro {
    grid-template-columns: minmax(0, 1fr) clamp(106px, 30vw, 174px);
    gap: clamp(1rem, 5vw, 2.5rem);
    max-width: 620px;
  }

  .portrait {
    width: 100%;
    height: auto;
  }

  .home-main {
    padding: 3.25rem 1rem 4rem;
  }

  .content-main {
    padding: 3rem 1rem 4rem;
  }

  .papers-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

}