/* Anandi Mani — academic site */

:root {
  --text: #1f2328;
  --muted: #5c6570;
  --link: #1155aa;
  --rule: #e2e4e8;
  --bg: #ffffff;
  --accent-bg: #f6f7f9;
  --wrap: 1240px;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  /* always reserve the scrollbar track, so collapsing the research
     dropdowns below one screen can't jolt the layout wider */
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

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

.wrap {
  max-width: var(--wrap);
  /* explicit width so the container can never shrink-wrap its content
     and change size as the research dropdowns are toggled */
  width: 100%;
  margin: 0 auto;
  /* longhand on purpose: the shorthand would reset the vertical padding
     that <main class="wrap"> inherits from the `main` rule below */
  padding-left: 24px;
  padding-right: 24px;
}

/* ---------- header / tabs ---------- */

.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 22px;
  padding-bottom: 0;
}

.brand {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 26px;
  letter-spacing: 0.01em;
  color: var(--text);
  padding-bottom: 14px;
}
.brand:hover { text-decoration: none; }

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.tabs a {
  display: block;
  padding: 8px 14px 12px;
  color: var(--muted);
  font-size: 15px;
  letter-spacing: 0.02em;
  border-bottom: 3px solid transparent;
}

.tabs a:hover {
  color: var(--text);
  text-decoration: none;
  border-bottom-color: var(--rule);
}

.tabs a.active {
  color: var(--text);
  border-bottom-color: var(--text);
}

/* ---------- content ---------- */

main { padding: 48px 0 64px; }

h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 34px;
  font-weight: normal;
  margin: 0 0 28px;
}

h2 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 44px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

p { margin: 0 0 16px; }

/* the pages no longer open with an <h1>, so drop the leading
   margin that would otherwise double up with main's padding */
main > :first-child { margin-top: 0; }

/* ---------- home ---------- */

/* the home page is a single screen: header, then the hero fills the rest */
body.home {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero {
  flex: 1 0 auto;
  display: flex;
  align-items: center;
  padding: 40px 0;
  background: url('bg.jpg') center / cover no-repeat;
}

/* translucent card floating over the photo:
   photo on the left, name + bio on the right */
.intro {
  display: flex;
  align-items: flex-start;
  gap: 34px;
  padding: 34px 38px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 8px 34px rgba(0, 0, 0, 0.22);
}

.intro .photo {
  flex: 0 0 210px;
  width: 210px;
  border-radius: 3px;
  display: block;
}

.intro .about { flex: 1 1 auto; min-width: 0; }

.intro .name {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 34px;
  margin: 0 0 8px;
  font-weight: normal;
  line-height: 1.2;
}

.intro .title {
  color: var(--muted);
  font-size: 17px;
  margin: 0 0 6px;
}

.intro .email {
  font-size: 16px;
  margin: 0 0 22px;
}

/* ---------- research themes (dropdowns) ---------- */

details.theme {
  border: 1px solid var(--rule);
  border-radius: 4px;
  margin-bottom: 12px;
  background: var(--bg);
}

details.theme > summary {
  cursor: pointer;
  padding: 15px 20px;
  font-size: 18px;
  font-weight: 600;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
  border-radius: 4px;
  /* reserve the divider's 1px at all times: colouring it in on open
     keeps the header row exactly the same height either way */
  border-bottom: 1px solid transparent;
}

details.theme > summary::-webkit-details-marker { display: none; }

details.theme > summary::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
}

details.theme[open] > summary::before { transform: rotate(45deg); }
details.theme > summary:hover { background: var(--accent-bg); }
details.theme[open] > summary { border-bottom-color: var(--rule); }

.papers {
  list-style: none;
  margin: 0;
  padding: 8px 20px 16px;
}

.papers li {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}
.papers li:last-child { border-bottom: none; }

.papers .t { font-weight: 600; }
.papers .m {
  display: block;
  color: var(--muted);
  font-size: 15px;
  margin-top: 2px;
}

/* ---------- press / media ---------- */

.videos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin-bottom: 8px;
}

.video figcaption {
  color: var(--muted);
  font-size: 15px;
  margin-top: 8px;
}

.ratio {
  position: relative;
  padding-top: 56.25%;
  background: var(--accent-bg);
  border-radius: 4px;
  overflow: hidden;
}

.ratio iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.links li {
  padding: 11px 0;
  border-bottom: 1px solid var(--rule);
}
.links li:last-child { border-bottom: none; }

.links .m {
  display: block;
  color: var(--muted);
  font-size: 15px;
  margin-top: 2px;
}

/* ---------- teaching ---------- */

.courses { list-style: none; margin: 0; padding: 0; }

.courses li {
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
}
.courses li:last-child { border-bottom: none; }

.courses .t { font-weight: 600; }
.courses .m {
  display: block;
  color: var(--muted);
  font-size: 15px;
  margin-top: 2px;
}

/* ---------- small screens ---------- */

@media (max-width: 620px) {
  body { font-size: 16px; }
  .site-header .wrap { padding-top: 18px; }
  .brand { font-size: 22px; padding-bottom: 8px; }
  .tabs a { padding: 8px 10px 10px; }
  h1 { font-size: 28px; }
  main { padding: 32px 0 48px; }

  .hero { padding: 24px 0; }

  /* stack the photo above the bio, centred */
  .intro {
    display: block;
    text-align: center;
    padding: 26px 22px;
  }
  .intro .photo {
    width: 180px;
    max-width: 55%;
    margin: 0 auto 22px;
  }
  .intro .name { font-size: 28px; }
  .intro .about { text-align: left; }
  .intro .name,
  .intro .title { text-align: center; }
}