/* ==========================================================================
   Kelcey Davis — personal site
   Palette is taken from the things the research is about: the oxidised red of
   a little red dot, the [O III] teal of an extreme emission line galaxy, and
   the blue-violet of a short-wavelength medium band. Plum carries links.
   ========================================================================== */

:root {
  --paper:      #fcfbf9;
  --paper-sunk: #f2f1ed;
  --ink:        #1b1e26;
  --ink-soft:   #5c6270;
  --rule:       #dedcd6;

  --plum:        #4a2545;
  --plum-bright: #743d6c;

  --lrd:    #a32e1e;
  --eelg:   #1b6f62;
  --survey: #3b4c99;

  --serif: "Newsreader", Georgia, serif;
  --sans:  "Public Sans", system-ui, -apple-system, sans-serif;

  --t-xs:  0.8125rem;
  --t-sm:  0.9375rem;
  --t-lg:  1.1875rem;
  --t-xl:  1.5rem;
  --t-2xl: 2rem;
  --t-3xl: 2.625rem;

  --measure: 39rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:      #16181c;
    --paper-sunk: #1f2229;
    --ink:        #e7e5e0;
    --ink-soft:   #9aa0ac;
    --rule:       #32363f;

    --plum:        #d5a7cd;
    --plum-bright: #eec5e7;

    --lrd:    #e08672;
    --eelg:   #6dc0b0;
    --survey: #93a5e8;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { font-size: 17px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  font-synthesis-weight: none;
}

a { color: var(--plum); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--plum-bright); }
a:focus-visible,
.skip:focus {
  outline: 2px solid var(--plum);
  outline-offset: 3px;
  border-radius: 1px;
}

img { max-width: 100%; height: auto; display: block; }

code {
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.85em;
  background: var(--paper-sunk);
  padding: 0.1em 0.35em;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--paper);
  padding: 0.75rem 1rem;
  z-index: 10;
}
.skip:focus { left: 0; }

/* --------------------------------------------------------------------------
   Layout: fixed rail on the left, single column of reading matter on the right
   -------------------------------------------------------------------------- */

.layout {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  gap: 4.5rem;
  max-width: 64rem;
  margin: 0 auto;
  padding: 3.5rem 2rem 5rem;
}

.rail-inner { position: sticky; top: 3.5rem; }

.identity { display: block; text-decoration: none; color: inherit; }
.identity:hover .identity-name { color: var(--plum); }

.identity-name {
  display: block;
  font-family: var(--serif);
  font-size: var(--t-xl);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 0.4rem;
}

.identity-role {
  display: block;
  font-size: var(--t-xs);
  color: var(--ink-soft);
  line-height: 1.45;
}

.nav { margin: 2.25rem 0; }
.nav ul { list-style: none; margin: 0; padding: 0; }
.nav > ul > li { margin-bottom: 0.55rem; }

.nav a {
  text-decoration: none;
  font-size: var(--t-sm);
  color: var(--ink);
  display: inline-block;
  padding: 0.1rem 0;
}
.nav a:hover { color: var(--plum); text-decoration: underline; }
.nav a[aria-current="page"] { color: var(--plum); font-weight: 600; }

.nav-sub { margin: 0.4rem 0 0.9rem 0; }
.nav-sub li { margin-bottom: 0.3rem; }
.nav-sub a { font-size: var(--t-xs); color: var(--ink-soft); }

/* the swatch says which topic, so it earns its place */
.topic-link::before {
  content: "";
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.5rem;
  vertical-align: 0.02em;
  background: currentColor;
}
.topic-lrd::before    { background: var(--lrd); }
.topic-eelg::before   { background: var(--eelg); }
.topic-survey::before { background: var(--survey); }

.rail-contact {
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
  font-size: var(--t-xs);
  line-height: 1.7;
}
.rail-contact > a { display: block; word-break: break-word; }
.rail-links { display: block; margin-top: 0.35rem; }
.rail-links a { margin-right: 0.7rem; }

/* --------------------------------------------------------------------------
   Content
   -------------------------------------------------------------------------- */

.content { min-width: 0; }

.page-title {
  font-family: var(--serif);
  font-size: var(--t-3xl);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.lede {
  font-family: var(--serif);
  font-size: var(--t-lg);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: var(--measure);
  margin: 0 0 2rem;
}

.prose { max-width: none; }
.prose > p, .prose > ul, .prose > ol, .prose > h2, .prose > h3,
.prose > blockquote, .prose > table { max-width: var(--measure); }
.prose p, .prose ul, .prose ol { margin: 0 0 1.15rem; }
.prose ul, .prose ol { padding-left: 1.2rem; }
.prose li { margin-bottom: 0.4rem; }

.prose h2 {
  font-family: var(--serif);
  font-size: var(--t-xl);
  font-weight: 500;
  line-height: 1.2;
  margin: 2.5rem 0 0.75rem;
}

.prose h3 {
  font-size: var(--t-lg);
  font-weight: 600;
  margin: 2rem 0 0.5rem;
}

.placeholder {
  border-left: 2px solid var(--rule);
  padding: 0.1rem 0 0.1rem 1.1rem;
  color: var(--ink-soft);
  font-style: italic;
}

/* --------------------------------------------------------------------------
   Homepage figure: JWST filter bandpasses
   -------------------------------------------------------------------------- */

.bandpasses {
  max-width: none;
  margin: 2.5rem 0 3rem;
}
.bandpasses svg { width: 100%; height: auto; }

.figure-note {
  font-size: var(--t-xs);
  color: var(--ink-soft);
  max-width: var(--measure);
  margin: 0.75rem 0 0;
}

@media (prefers-reduced-motion: no-preference) {
  .bandpasses .band-line {
    stroke-dasharray: 900;
    stroke-dashoffset: 900;
    animation: draw 1.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  }
  .bandpasses .band-fill { opacity: 0; animation: fade 1.4s ease-out 0.7s forwards; }
  @keyframes draw { to { stroke-dashoffset: 0; } }
  /* Must land on the same value as the fill-opacity attribute in the SVG:
     a CSS animation overrides that attribute, so ending at 1 would turn the
     wide bands solid. */
  @keyframes fade { to { opacity: 0.075; } }
}

/* --------------------------------------------------------------------------
   Research index cards
   -------------------------------------------------------------------------- */

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11.5rem, 1fr));
  gap: 1.75rem;
  margin: 2.5rem 0 1rem;
  max-width: none;
}

.topic-card { text-decoration: none; color: inherit; display: block; }
.topic-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--paper-sunk);
  border-bottom: 3px solid var(--rule);
}
.topic-card.topic-lrd img    { border-bottom-color: var(--lrd); }
.topic-card.topic-eelg img   { border-bottom-color: var(--eelg); }
.topic-card.topic-survey img { border-bottom-color: var(--survey); }

.topic-card h2 {
  font-family: var(--serif);
  font-size: var(--t-lg);
  font-weight: 500;
  margin: 0.85rem 0 0.3rem;
}
.topic-card:hover h2 { color: var(--plum); text-decoration: underline; }
.topic-card p { margin: 0; font-size: var(--t-sm); color: var(--ink-soft); }

/* --------------------------------------------------------------------------
   Topic page
   -------------------------------------------------------------------------- */

.topic-head { margin-bottom: 1.5rem; }

.topic-figure { margin: 0 0 1.5rem; max-width: 28rem; }
.topic-figure img {
  width: 100%;
  height: auto;
  background: var(--paper-sunk);
  border-bottom: 3px solid var(--rule);
}
.topic-lrd .topic-figure img    { border-bottom-color: var(--lrd); }
.topic-eelg .topic-figure img   { border-bottom-color: var(--eelg); }
.topic-survey .topic-figure img { border-bottom-color: var(--survey); }

.topic-figure figcaption {
  font-size: var(--t-xs);
  color: var(--ink-soft);
  margin-top: 0.5rem;
}

/* --------------------------------------------------------------------------
   Publication lists
   -------------------------------------------------------------------------- */

.papers { max-width: var(--measure); margin-top: 3rem; }

.papers h2 {
  font-family: var(--serif);
  font-size: var(--t-xl);
  font-weight: 500;
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}

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

.paper {
  padding: 0 0 1.15rem;
  margin-bottom: 1.15rem;
  border-bottom: 1px solid var(--rule);
}
.paper:last-child { border-bottom: none; margin-bottom: 0; }

.paper-title {
  font-family: var(--serif);
  font-size: var(--t-lg);
  font-weight: 500;
  line-height: 1.3;
  text-decoration: none;
  color: var(--ink);
  display: block;
}
.paper-title:hover { color: var(--plum); text-decoration: underline; }

.paper-meta { margin: 0.4rem 0 0.5rem; font-size: var(--t-sm); color: var(--ink-soft); }
.paper-authors { display: block; }
.paper-source { display: block; font-style: italic; }

.paper-links { margin: 0; font-size: var(--t-xs); }
.paper-links a { margin-right: 0.9rem; }
.paper-cites { color: var(--ink-soft); }

.year-heading {
  font-family: var(--serif);
  font-size: var(--t-lg);
  font-weight: 600;
  color: var(--ink-soft);
  margin: 2rem 0 0.9rem;
}
.year-heading:first-of-type { margin-top: 0; }

.empty { font-size: var(--t-sm); color: var(--ink-soft); }

/* --------------------------------------------------------------------------
   Word cloud and citation statistics
   -------------------------------------------------------------------------- */

.wordcloud {
  max-width: none;
  margin: 0 0 3rem;
  padding: 2rem 1.5rem;
  background: var(--paper-sunk);
  font-family: var(--serif);
  line-height: 1.35;
  text-align: center;
}

.wordcloud a {
  display: inline-block;
  margin: 0.1rem 0.45rem;
  text-decoration: none;
  color: var(--ink-soft);
  vertical-align: middle;
}
.wordcloud a:hover { color: var(--plum); text-decoration: underline; }
.wordcloud .w1 { font-size: 0.9rem; }
.wordcloud .w2 { font-size: 1.15rem; }
.wordcloud .w3 { font-size: 1.5rem; color: var(--ink); }
.wordcloud .w4 { font-size: 2rem;   color: var(--ink); font-weight: 500; }
.wordcloud .w5 { font-size: 2.6rem; color: var(--plum); font-weight: 500; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 1.5rem 2rem;
  margin: 2.75rem 0 1.25rem;
  padding: 0;
  max-width: none;
}
.stats div { margin: 0; }
.stats dt { font-size: var(--t-xs); color: var(--ink-soft); }
.stats dd {
  margin: 0.1rem 0 0;
  font-family: var(--serif);
  font-size: var(--t-2xl);
  font-weight: 500;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.updated { font-size: var(--t-xs); color: var(--ink-soft); }

/* --------------------------------------------------------------------------
   CV
   -------------------------------------------------------------------------- */

.cv-actions { margin: 0 0 1.75rem; }

.cv-download {
  display: inline-block;
  font-size: var(--t-sm);
  text-decoration: none;
  color: var(--paper);
  background: var(--plum);
  padding: 0.55rem 1.1rem;
}
.cv-download:hover { background: var(--plum-bright); color: var(--paper); }

.cv-embed {
  /* Break out of the content column: the PDF viewer's own toolbar overlaps
     the page when the frame is only as wide as a column of text. */
  width: 92vw;
  max-width: 78rem;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  height: 88vh;
  min-height: 34rem;
  border: 1px solid var(--rule);
  background: var(--paper-sunk);
}

.cv-fallback { padding: 2rem; font-size: var(--t-sm); }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  margin-top: 5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-size: var(--t-xs);
  color: var(--ink-soft);
  max-width: var(--measure);
}
.site-footer p { margin: 0 0 0.35rem; }
.site-footer .fine { color: var(--ink-soft); }

/* --------------------------------------------------------------------------
   Narrow screens
   -------------------------------------------------------------------------- */

@media (max-width: 56rem) {
  html { font-size: 16px; }

  .layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding: 2rem 1.25rem 3.5rem;
  }

  .rail-inner { position: static; }

  .rail {
    border-bottom: 1px solid var(--rule);
    padding-bottom: 1.5rem;
  }

  .nav { margin: 1.5rem 0 1.25rem; }
  .nav > ul { display: flex; flex-wrap: wrap; gap: 0 1.4rem; }
  .nav > ul > li { margin-bottom: 0; }
  /* The research page shows all three topics as image cards, which works
     better than a second row of links on a small screen. */
  .nav-sub { display: none; }

  .bandpasses .tick-label { display: none; }

  .page-title { font-size: var(--t-2xl); }
  .wordcloud { padding: 1.5rem 1rem; }
  .wordcloud .w5 { font-size: 1.9rem; }
  .wordcloud .w4 { font-size: 1.5rem; }
  .cv-embed { height: 70vh; }
}

.videos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr));
  gap: 1.75rem;
  margin: 2rem 0 2.5rem;
}

.video-item { margin: 0; }

.video-item iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  background: var(--paper-sunk);
}

.video-item figcaption {
  font-size: var(--t-xs);
  color: var(--ink-soft);
  line-height: 1.45;
  margin-top: 0.5rem;
}

.blink { margin: 2rem 0 2.5rem; max-width: var(--measure); }
.blink-frames { position: relative; }
.blink-frames img { width: 100%; display: block; }
.blink-frames img + img {
  position: absolute;
  inset: 0;
  animation: blink 3s steps(1, end) infinite;
}
@keyframes blink { 0%, 49% { opacity: 0; } 50%, 100% { opacity: 1; } }

.blink:has(.blink-pause:checked) .blink-frames img + img {
  animation-play-state: paused;
}

.blink-pause { position: absolute; opacity: 0; pointer-events: none; }
.blink-pause + label {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: var(--t-xs);
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
}
.blink-pause:focus-visible + label { outline: 2px solid var(--plum); outline-offset: 3px; }
.blink-pause:checked + label::after { content: " (paused)"; }

.blink figcaption { font-size: var(--t-xs); color: var(--ink-soft); margin-top: 0.5rem; }

@media (prefers-reduced-motion: reduce) {
  .blink-frames { display: grid; gap: 1rem; }
  .blink-frames img + img { position: static; animation: none; opacity: 1; }
  .blink-pause + label { display: none; }
}

/* --------------------------------------------------------------------------
   Photo galleries on the outreach page
   -------------------------------------------------------------------------- */

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 1.5rem;
  margin: 2rem 0 2.5rem;
  align-items: start;
}

.gallery-item { margin: 0; }

.gallery-item img {
  width: 100%;
  height: auto;
  background: var(--paper-sunk);
  display: block;
}

.gallery-item figcaption {
  font-size: var(--t-xs);
  color: var(--ink-soft);
  line-height: 1.45;
  margin-top: 0.5rem;
}

/* --------------------------------------------------------------------------
   CEERS imagery: a full band on the homepage, a thin crop elsewhere
   -------------------------------------------------------------------------- */

.hero { margin: 0 0 2.5rem; }
.hero img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  display: block;
}

.page-strip {
  height: 5.5rem;
  margin-bottom: 2.25rem;
  background-size: cover;
  background-position: center 35%;
}

@media (max-width: 56rem) {
  .hero img { aspect-ratio: 16 / 9; }
  .page-strip { height: 3.5rem; }
}

/* --------------------------------------------------------------------------
   Sonified spectra on the outreach page
   -------------------------------------------------------------------------- */

.sonification { margin: 2.25rem 0 2.5rem; max-width: var(--measure); }

.sonification img {
  width: 100%;
  display: block;
  background: #000;
}

.sonification figcaption {
  font-size: var(--t-xs);
  color: var(--ink-soft);
  line-height: 1.45;
  margin-top: 0.5rem;
}

.sonification-tracks { display: grid; gap: 1.1rem; margin-top: 1.5rem; }

.track-label {
  display: block;
  font-size: var(--t-xs);
  color: var(--ink-soft);
  margin-bottom: 0.35rem;
}

.track audio { width: 100%; }