/* ==========================================================================
   Shared stylesheet for the paper pages under projects/. Single column,
   centred hero, figure-led — the layout of the Academic Project Page
   Template, rebuilt without Bulma so the pages need nothing beyond the font.
   ========================================================================== */

:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f4f6f8;
  --text: #1c2b33;
  --text-muted: #465a69;
  --text-faint: #5a6e7f;
  --border: #dee3e9;
  /* Blue rather than the homepage's scarlet: it sits more quietly beside the
     papers' own figure colours. */
  --link: #1d5fa6;
  --link-hover: #154a83;
  --btn: #23292e;
  --btn-hover: #000000;

  --font: "Wix Madefor Text", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --wide: 1080px;
  --measure: 760px;
  --radius: 12px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  font-weight: 450;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--btn);
  color: #fff;
  z-index: 10;
}

.skip-link:focus {
  top: 12px;
}

.wrap {
  width: 100%;
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 24px;
}

.prose {
  max-width: var(--measure);
  margin-left: auto;
  margin-right: auto;
}

/* --- Hero ----------------------------------------------------------------- */

.hero {
  padding: 80px 0 28px;
  text-align: center;
}

.hero__title {
  max-width: 920px;
  margin: 0 auto 24px;
  font-size: clamp(1.8rem, 1.2rem + 2.6vw, 2.8rem);
  font-weight: 750;
  line-height: 1.15;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.authors {
  margin: 0 0 6px;
  font-size: 1.125rem;
  line-height: 1.6;
}

.authors li {
  display: inline;
  /* Wrap between authors, never inside a name. */
  white-space: nowrap;
}

.authors li:not(:last-child)::after {
  content: ",";
  margin-right: 0.35em;
}

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

sup {
  font-size: 0.7em;
  line-height: 0;
  margin-left: 1px;
}

.affiliations {
  margin: 0;
  color: var(--text-muted);
}

.affiliations span {
  white-space: nowrap;
}

.affiliations span + span {
  margin-left: 1.1em;
}

.venue {
  margin: 10px 0 0;
  font-weight: 550;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px 9px 15px;
  border-radius: 999px;
  background: var(--btn);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 550;
  line-height: 1.2;
}

.btn:hover {
  background: var(--btn-hover);
  color: #fff;
  text-decoration: none;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* --- Figures -------------------------------------------------------------- */

.figure {
  margin: 0;
}

.figure img {
  width: 100%;
}

.figure a {
  display: block;
  cursor: zoom-in;
}

/* The paper's figures have white grounds; on a tinted band, frame them as
   cards so the edge reads as deliberate rather than a hard white block. */
.section--tint .figure img {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #ffffff;
}

.figure figcaption {
  max-width: var(--measure);
  margin: 16px auto 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.figure figcaption strong {
  color: var(--text);
  font-weight: 650;
}

.figure + .figure,
.prose + .figure {
  margin-top: 32px;
}

.figure + p,
.figure + h3 {
  margin-top: 32px;
}

.teaser {
  padding: 20px 0 56px;
}

/* --- Sections ------------------------------------------------------------- */

.section {
  padding: 64px 0;
}

.section--tint {
  background: var(--surface);
}

.section h2 {
  margin: 0 0 24px;
  font-size: clamp(1.5rem, 1.2rem + 1vw, 1.9rem);
  font-weight: 750;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-align: center;
}

.section h3 {
  margin: 36px 0 8px;
  font-size: 1.15rem;
  font-weight: 650;
  line-height: 1.35;
}

.section p {
  margin: 0 0 16px;
}

.section p:last-child {
  margin-bottom: 0;
}

/* --- Framework points ---------------------------------------------------- */

.points {
  margin: 32px 0 0;
  padding-left: 1.2em;
}

.points li + li {
  margin-top: 10px;
}

.points strong {
  font-weight: 650;
}

.formula {
  white-space: nowrap;
}

/* --- BibTeX --------------------------------------------------------------- */

.bib {
  position: relative;
}

.bib pre {
  margin: 0;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  font-family: var(--mono);
  font-size: 0.84rem;
  line-height: 1.6;
  overflow-x: auto;
}

.copy {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 550;
  cursor: pointer;
}

.copy:hover {
  background: var(--btn);
  border-color: var(--btn);
  color: #fff;
}

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

.site-footer {
  padding: 40px 0 56px;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 0.9rem;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.site-footer p + p {
  margin-top: 6px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* --- Small screens -------------------------------------------------------- */

@media (max-width: 600px) {
  body {
    font-size: 1rem;
  }

  .wrap {
    padding: 0 16px;
  }

  .hero {
    padding-top: 48px;
  }

  .authors {
    font-size: 1.05rem;
  }

  .affiliations span {
    display: block;
  }

  .affiliations span + span {
    margin-left: 0;
  }

  .section {
    padding: 48px 0;
  }

  .teaser {
    padding-bottom: 40px;
  }

  .section--tint .figure img {
    padding: 6px;
  }

  /* Leave room for the copy button over the first line of the entry. */
  .bib pre {
    padding-top: 48px;
  }
}