@import url("https://fonts.googleapis.com/css2?family=Lato:ital,wght@0,400;0,700;1,400;1,700&display=swap");

:root {
  --text: #111;
  --link: #1772d0;
  --link-hover: #f09228;
  --muted: #444;
  --thumb-bg: #f4f6f8;
  --thumb-border: #d9e0e7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: Lato, Verdana, Helvetica, sans-serif;
  font-size: 14px;
  line-height: 1.45;
}

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

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

p {
  margin: 0 0 1em;
}

.page {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0;
}

.intro {
  display: grid;
  grid-template-columns: 63% 37%;
  align-items: center;
  padding-top: 34px;
}

.intro-text {
  padding: 2.5%;
}

h1 {
  margin: 0 0 18px;
  text-align: center;
  font-size: 32px;
  font-weight: 400;
  line-height: 1.1;
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 0.45em;
  margin-top: 12px;
}

.links span {
  color: var(--muted);
}

.profile {
  padding: 2.5%;
}

.profile img {
  display: block;
  width: 100%;
  max-width: 80%;
  margin: 0 auto;
  aspect-ratio: 1;
  border-radius: 20%;
  object-fit: cover;
  object-position: center 22%;
}

.section {
  padding-top: 18px;
}

h2 {
  margin: 0;
  padding: 16px 16px 8px;
  border-bottom: 1px solid #d8d8d8;
  font-size: 22px;
  font-weight: 400;
  line-height: 1.2;
}

.research-item {
  display: grid;
  grid-template-columns: 20% 80%;
  align-items: center;
  border-spacing: 0 10px;
}

.research-thumb {
  display: grid;
  width: 160px;
  height: 160px;
  max-width: calc(100% - 32px);
  margin: 16px;
  place-items: center;
  overflow: hidden;
  color: #1d3f5f;
  background:
    radial-gradient(circle at 30% 25%, rgba(23, 114, 208, 0.28), transparent 34%),
    linear-gradient(135deg, #f8fbff 0%, #e8eef6 100%);
  border: 1px solid var(--thumb-border);
  border-radius: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.research-content {
  padding: 8px;
}

.paper-title {
  font-weight: 700;
}

.authors,
.venue,
.paper-links {
  margin-bottom: 0.2em;
}

.paper-description {
  margin-top: 1em;
}

.research-content p:last-child {
  margin-bottom: 0;
}

.education-list {
  padding: 0 16px;
}

.education-list p {
  margin: 0;
  padding: 8px 0;
}

.personal-content {
  padding: 8px 16px 0;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(4, 160px);
  gap: 12px;
  margin-top: 12px;
  justify-content: start;
}

.photo-card {
  display: block;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background: #f3f5f7;
  border-radius: 10px;
}

.photo-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(var(--photo-scale, 1));
  transition: transform 180ms ease;
}

.photo-card:hover img,
.photo-card:focus img {
  transform: scale(calc(var(--photo-scale, 1) + 0.03));
}

.photo-01 {
  object-position: 30% 70%;
}

.photo-02 {
  object-position: 58% 78%;
}

.photo-03 {
  --photo-scale: 1.15;
  object-position: 80% 116%;
}

.photo-04 {
  object-position: 50% 80%;
}

footer {
  padding: 26px 0 12px;
}

footer p {
  text-align: center;
  font-size: 12px;
}

@media (max-width: 640px) {
  .page {
    padding: 18px;
  }

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

  .intro-text {
    order: 2;
    padding: 16px 0 0;
  }

  .profile {
    order: 1;
    max-width: 260px;
    margin: 0 auto;
    padding: 0;
  }

  h1 {
    margin-top: 8px;
  }

  h2 {
    padding: 18px 0 8px;
  }

  .research-item {
    grid-template-columns: 1fr;
  }

  .research-thumb {
    width: 160px;
    max-width: 160px;
    margin: 0 0 12px;
  }

  .research-content,
  .education-list,
  .personal-content {
    padding: 0;
  }

  .photo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .photo-card {
    aspect-ratio: 4 / 5;
  }
}