@font-face {
  font-family: "Libertinus Serif";
  src: url("fonts/libertinus/LibertinusSerif-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Libertinus Serif";
  src: url("fonts/libertinus/LibertinusSerif-Italic.woff2") format("woff2");
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Libertinus Math";
  src: url("fonts/libertinus/LibertinusMath-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Libertinus Mono";
  src: url("fonts/libertinus/LibertinusMono-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Computer Modern Serif";
  src: url("fonts/computer-modern/cmunrm.woff") format("woff");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  --page-background: #03080d;
  --text-color: #fff;
  --link-color: #fff;
  --caption-color: #ccc;
  color-scheme: dark;
  background: var(--page-background);
  color: var(--text-color);
  font-family: "Libertinus Serif", serif;
  font-size: 16px;
  font-synthesis: none;
  line-height: 1.55;
}

:root[data-theme="light"] {
  --page-background: #fff;
  --text-color: #000;
  --link-color: #045a8d;
  --caption-color: #555;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page-background);
}

.paper {
  max-width: 930px;
  margin: 0 auto;
  padding: 36px 40px 100px;
}

a {
  color: var(--link-color);
  text-decoration: none;
  text-underline-offset: 0.15em;
}

a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }
[id] { scroll-margin-top: 24px; }

.home-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
}

#darkToggle {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font-family: inherit;
  font-size: 12px;
  font-weight: 400;
  cursor: pointer;
  opacity: 0.85;
  transition: opacity 0.2s;
}

#darkToggle:hover { opacity: 1; text-decoration: underline; }
#darkToggle:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }

.paper-header {
  text-align: center;
  margin: 64px 0 64px;
}

h1 {
  font-size: 1.44rem;
  font-weight: 400;
  line-height: 1.25;
  text-transform: uppercase;
  margin: 0 0 2em;
}

.paper-header p { text-indent: 0; }
.author { margin: 0 0 1.5em; }
.affiliation { font-size: 0.9rem; line-height: 1.5; margin: 0; }
.email { font-family: "Libertinus Mono", monospace; font-size: 0.9em; }

.galaxy-figure {
  width: 100%;
  max-width: 720px;
  margin: 0 auto 128px;
  text-align: center;
}

.galaxy-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.galaxy-figure figcaption {
  margin-top: 8px;
  font-style: italic;
  color: var(--caption-color);
  font-size: 0.9em;
}

h2 {
  font-family: "Computer Modern Serif", "Libertinus Serif", serif;
  font-size: 1rem;
  font-variant-caps: small-caps;
  font-synthesis: small-caps;
  font-weight: 400;
  text-align: center;
  line-height: 1.4;
  margin: 2.4em 0 1.3em;
}

h2 span { margin-left: 0.7em; }

p {
  margin: 0 0 1.15em;
  text-indent: 1.5em;
}

blockquote { margin: 1.7em 2em; }
blockquote p { font-style: italic; text-indent: 0; margin-bottom: 0.3em; }
blockquote footer { font-size: 0.95em; }
.opening-quote { margin-bottom: 2em; }

math { font-family: "Libertinus Math", math; font-size: 1em; }
.citation { white-space: nowrap; }
.references { margin-top: 3em; font-size: 0.9rem; }
.reference { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 0.8em; }
.reference p { text-indent: 0; overflow-wrap: anywhere; }

@media (max-width: 600px) {
  :root { font-size: 12px; }
  .paper { padding: 24px 22px 60px; }
  .paper-header { margin: 48px 0; }
  blockquote { margin-left: 1em; margin-right: 1em; }
}

@media print {
  @page { size: A4; margin: 3cm; }
  :root { color-scheme: light; background: #fff; color: #000; font-size: 10pt; line-height: 1.3; }
  body { background: #fff; }
  a { color: #045a8d; }
  .galaxy-figure figcaption { color: #555; }
  .paper { max-width: none; padding: 0; }
  .home-link { display: none; }
  .paper-header { margin-top: 1cm; }
  h2 { break-after: avoid; }
  blockquote, .reference { break-inside: avoid; }
  p { orphans: 3; widows: 3; }
}