:root {
  --ink: #222;
  --muted: #555;
  --line: #e6e6e6;
  --link: #1772d0;
  --bg: #fff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

.main-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
}

.nav-container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.nav-brand {
  color: var(--link);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav-brand:hover {
  text-decoration: none;
  color: #0d5cb0;
}

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 28px;
}

.nav-link {
  color: var(--muted);
  font-weight: 500;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--link);
  text-decoration: none;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -18px;
  height: 2px;
  background: var(--link);
}

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

a:hover {
  text-decoration: underline;
}

.page {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 56px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 32px 28px 72px;
  align-items: start;
}

.profile {
  position: sticky;
  top: 84px;
  text-align: center;
}

main {
  min-width: 0;
}

.portrait {
  width: 168px;
  height: 168px;
  object-fit: cover;
  object-position: center 18%;
  border-radius: 50%;
  display: block;
  margin: 0 auto 16px;
}

.profile h1 {
  margin: 0 0 6px;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.role {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.icons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 14px;
}

.icons a {
  color: #444;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
}

.icons a:hover {
  color: #111;
  text-decoration: none;
}

.icons svg,
.icons img {
  width: 22px;
  height: 22px;
  display: block;
}

main > section + section {
  margin-top: 8px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.intro {
  margin: 0;
}

.exp {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin: 0 0 22px;
}

.exp img {
  width: 128px;
  max-height: 52px;
  object-fit: contain;
  object-position: left center;
}

.exp p {
  margin: 0;
}

.exp-title {
  margin-bottom: 4px !important;
}

h2 {
  margin: 0 0 8px;
  font-size: 1.35rem;
  font-weight: 600;
}

.paper {
  display: grid;
  grid-template-columns: 168px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.paper:last-child {
  border-bottom: 1px solid var(--line);
}

.teaser {
  width: 168px;
  height: auto;
  object-fit: contain;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: #fff;
}

.paper h3 {
  margin: 0 0 4px;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.35;
}

.authors,
.venue {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.paper-links {
  font-weight: 400;
  color: var(--muted);
  white-space: nowrap;
}

@media (max-width: 800px) {
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 12px 18px;
  }

  .nav-link.active::after {
    bottom: -4px;
  }

  .page {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 28px;
  }

  .profile {
    position: static;
  }

  .exp,
  .paper {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 12px;
  }

  .exp img,
  .teaser {
    width: 96px;
  }
}

@media (max-width: 560px) {
  .nav-links {
    display: grid;
    grid-template-columns: max-content max-content;
    column-gap: 22px;
    row-gap: 10px;
  }
}