:root {
  --text: #1a1a1a;
  --muted: #666;
  --accent: #2b5797;
  --rule: #e2e2e2;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: #fff;
}

.container {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

/* Header / navigation */

header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  padding: 2.25rem 0 1rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2.5rem;
}

.site-name {
  font-size: 1.25rem;
  font-weight: normal;
  letter-spacing: 0.01em;
  margin: 0;
}

.site-name a {
  color: var(--text);
  text-decoration: none;
}

nav a {
  color: var(--accent);
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: 1rem;
}

nav a:first-child {
  margin-left: 0;
}

nav a:hover {
  text-decoration: underline;
}

nav a.current {
  color: var(--text);
  pointer-events: none;
}

/* General elements */

a {
  color: var(--accent);
}

h1 {
  font-size: 1.75rem;
  font-weight: normal;
  margin: 0 0 0.25rem;
}

h2 {
  font-size: 1.3rem;
  font-weight: normal;
  margin: 2.5rem 0 1.25rem;
}

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

/* Home page */

.intro {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.intro img {
  width: 11rem;
  max-width: 40vw;
  height: auto;
  border-radius: 2px;
  flex-shrink: 0;
}

.intro .affiliation {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.5;
}

/* Research section */

#research {
  margin-top: 3.5rem;
  scroll-margin-top: 1.5rem;
}

.paper {
  margin-bottom: 2.25rem;
}

.paper-title {
  font-size: 1.0625rem;
  margin: 0 0 0.15rem;
  font-weight: bold;
}

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

.paper-title a:hover {
  text-decoration: underline;
}

.paper-meta {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--muted);
}

.paper details {
  margin-top: 0.35rem;
}

.paper summary {
  cursor: pointer;
  font-size: 0.9375rem;
  color: var(--accent);
  width: fit-content;
}

.paper summary:hover {
  text-decoration: underline;
}

.paper details p {
  margin: 0.5rem 0 0;
  font-size: 0.9375rem;
  text-align: justify;
  hyphens: auto;
}

/* Narrow screens */

@media (max-width: 34rem) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  nav a {
    margin-left: 0;
    margin-right: 1.25rem;
  }

  .intro {
    flex-direction: column;
  }

  .intro img {
    max-width: 60vw;
  }
}