/* ---------- Colors and fonts: change these to restyle the whole site ---------- */
:root {
  --page: #ffffff;
  --text: #4b5157;
  --heading: #1f2428;
  --muted: #7a8188;
  --link: #2a6496;
  --rule: #e4e7ea;
  --font: "Source Sans 3", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --page: #1a1d20;
    --text: #c9ced3;
    --heading: #eef1f3;
    --muted: #959ca3;
    --link: #8ab8e0;
    --rule: #33383d;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.15em; }
:focus-visible { outline: 2px solid var(--link); outline-offset: 3px; }
h1, h2, h3 { color: var(--heading); line-height: 1.25; font-weight: 600; }
p { margin: 0 0 1rem; }

/* ---------- Two-column layout: profile on the left, content on the right ---------- */
.wrapper {
  max-width: 62rem;
  margin: 0 auto;
  padding: 4rem 2rem;
  display: grid;
  grid-template-columns: 17rem 1fr;
  gap: 4rem;
  align-items: start;
}

/* Left column stays in view while the right column scrolls */
.profile {
  position: sticky;
  top: 4rem;
  text-align: left;
}
.profile h1 {
  font-size: 1.55rem;
  white-space: nowrap; /* keeps the hyphenated name on one line */
  margin: 0 0 1.25rem;
}
.photo {
  width: 100%;
  max-width: 13rem;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  /* Shows img/photo.jpg; the grey circle shows until you add one */
  background: var(--rule) url("img/photo.jpg") center / cover no-repeat;
  margin-bottom: 1.25rem;
}
.position {
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.5;
}
.profile-links {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
}
.profile-links li { margin-bottom: 0.4rem; }
.profile-links a { font-weight: 600; }

/* Right column */
.content { max-width: 40rem; }
.content > p:first-child { margin-top: 0.2rem; }
.content h2 {
  font-size: 1.3rem;
  margin: 2.75rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}
.content h3 {
  font-size: 1.05rem;
  margin: 1.75rem 0 0.75rem;
}

/* Publication lists */
.pubs { list-style: none; margin: 0; padding: 0; }
.pubs li { margin-bottom: 1.1rem; }
.pubs .award {
  display: block;
  font-style: italic;
  color: var(--muted);
  font-size: 0.95rem;
}

footer {
  grid-column: 1 / -1;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---------- Phones and narrow windows: stack the columns ---------- */
@media (max-width: 46rem) {
  .wrapper {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding: 2.5rem 1.25rem;
  }
  .profile { position: static; }
  .profile h1 { white-space: normal; }
  .photo { max-width: 9rem; }
}