/* ---------------------------------------------------------------------------
   DEX-X project page
   --------------------------------------------------------------------------- */

:root {
  --bg: #fdfaf4;
  --fg: #1b1b1b;
  --fg-muted: #555;
  --fg-faint: #666;
  --rule: #ccc;
  --content-width: 960px;
  --wide-width: 1280px;
  --serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --mono: 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  /* The full-bleed gallery is 100vw wide, which includes the scrollbar;
     clip the few stray pixels instead of showing a page-wide h-scrollbar. */
  overflow-x: hidden;
}

body {
  margin: 0;
  background-color: var(--bg);
  font-family: var(--serif);
  color: var(--fg);
  padding: 60px 30px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Table of contents ---------------------------------------------------- */

.toc {
  width: 180px;
  font-family: var(--mono);
  position: fixed;
  top: 200px;
  display: none;
  z-index: 1000;
}

@media (min-width: 1400px) {
  .toc {
    display: block;
    left: max(30px, calc(25vw - 330px));
  }
}

.toc h3 {
  font-family: var(--serif);
  font-size: 24px;
  margin: 0 0 10px;
}

.toc hr {
  border: 0;
  height: 1px;
  background-color: var(--rule);
  margin-bottom: 15px;
}

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

.toc li { margin-bottom: 10px; }

.toc a {
  text-decoration: none;
  color: #333;
  font-size: 14px;
  line-height: 1.4;
  display: block;
}

.toc a:hover {
  color: #000;
  text-decoration: underline;
}

/* --- Main column ---------------------------------------------------------- */

.main-content {
  max-width: var(--content-width);
  margin: 0 auto;
}

.hero-text {
  font-size: 60px;
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: 10px;
}

.sub-hero-text {
  font-size: 34px;
  font-weight: 400;
  line-height: 1.25;
  margin-bottom: 18px;
}

.venue {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8a5b2a;
  margin-bottom: 14px;
}

.authors {
  font-family: var(--mono);
  font-size: 16px;
  color: #333;
  line-height: 1.6;
  margin-bottom: 30px;
  text-align: left;
}

/* --- Quick links ---------------------------------------------------------- */

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 30px;
}

.link-pill {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 400;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1.5px solid #1b1b1b;
  background: #1b1b1b;
  color: #fdfaf4;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.link-pill svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
  flex-shrink: 0;
}

a.link-pill:hover,
a.link-pill:focus {
  background: #fdfaf4;
  color: #1b1b1b;
}

.link-pill.is-pending {
  background: transparent;
  border-color: #bfb9ad;
  color: #8a8378;
  cursor: default;
}

.pill-note {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 7px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.07);
  color: #8a8378;
}

/* --- Section headings ----------------------------------------------------- */

.tagline {
  font-family: var(--mono);
  font-size: 24px;
  background: #000;
  color: #fff;
  display: inline-block;
  padding: 8px 16px;
  margin: 40px 0;
  scroll-margin-top: 30px;
}

.section {
  font-size: 20px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.section em { font-style: italic; }

.section .smallcaps { font-variant: small-caps; }

/* --- TL;DR callout -------------------------------------------------------- */

.tldr {
  font-size: 21px;
  line-height: 1.6;
  border: 1.5px solid #1b1b1b;
  border-radius: 15px;
  background: rgba(27, 27, 27, 0.03);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.tldr em {
  font-style: italic;
  font-weight: 700;
}

/* --- Citation ------------------------------------------------------------ */

.bibtex {
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
  white-space: pre;
  overflow-x: auto;
  border: 1.5px solid #1b1b1b;
  border-radius: 15px;
  background: rgba(27, 27, 27, 0.03);
  padding: 20px 24px;
  margin: 0 0 40px;
}

/* --- Figures and media ---------------------------------------------------- */

.media {
  display: block;
  width: 100%;
  max-width: var(--wide-width);
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  margin: 20px 0;
}

.media--narrow { max-width: 720px; }

img.figure-img {
  width: 100%;
  height: auto;
  display: block;
  border: 1.5px solid #000;
  border-radius: 15px;
  box-sizing: border-box;
}

.figure-caption {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.6;
  text-align: center;
  margin-top: 10px;
  margin-bottom: 40px;
  padding: 0 20px;
}

.figure-caption b,
.figure-caption strong { color: #222; }

/* --- Video grids ---------------------------------------------------------- */

.video-grid {
  display: grid;
  gap: 16px;
  max-width: var(--wide-width);
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  margin: 20px 0 40px;
}

.video-grid--2 { grid-template-columns: repeat(2, 1fr); }
.video-grid--3 { grid-template-columns: repeat(3, 1fr); }

.video-grid figure { margin: 0; }

.video-grid video {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  background: #000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.video-grid figcaption {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-muted);
  text-align: center;
  margin-top: 8px;
}

/* --- Horizontally scrolling gallery --------------------------------------- */

.video-gallery-section {
  width: 100vw;
  position: relative;
  margin-left: calc((100% - 100vw) / 2);
  margin-bottom: 20px;
  box-sizing: border-box;
}

.video-gallery-container {
  box-sizing: border-box;
  max-width: 1400px;
  margin: 0 auto;
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.video-gallery-container::-webkit-scrollbar { display: none; }

.video-gallery {
  display: flex;
  gap: 15px;
  padding: 6px 20px 12px;
  box-sizing: border-box;
  width: max-content;
  margin: 0 auto;
}

.gallery-item {
  flex: 0 0 auto;
  margin: 0;
}

.gallery-item video {
  display: block;
  height: 240px;
  width: auto;
  border-radius: 15px;
  background-color: #000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.gallery-item figcaption {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-muted);
  text-align: center;
  margin-top: 8px;
}

.gallery-caption-container {
  max-width: var(--content-width);
  margin: 10px auto 40px;
  padding: 0 20px;
  box-sizing: border-box;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.gallery-nav-controls {
  display: flex;
  align-items: center;
  margin-right: 15px;
}

.gallery-nav {
  background-color: rgba(40, 40, 40, 0.8);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 35px;
  height: 35px;
  font-size: 20px;
  font-weight: bold;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
  margin: 0 5px;
  flex-shrink: 0;
}

.gallery-nav:hover { background-color: rgba(0, 0, 0, 1); }

.figure-caption.gallery-caption {
  margin: 0;
  padding: 0;
  text-align: left;
  flex-grow: 1;
}

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

.footer {
  font-size: 14px;
  font-family: var(--mono);
  color: var(--fg-faint);
  margin-top: 80px;
  border-top: 1px solid var(--rule);
  padding-top: 30px;
  text-align: center;
}

.footer a { color: inherit; }

/* --- Responsive ----------------------------------------------------------- */

@media (max-width: 900px) {
  body { padding: 40px 20px; }
  .hero-text { font-size: 40px; }
  .sub-hero-text { font-size: 24px; }
  .section { font-size: 18px; }
  .tldr { font-size: 18px; padding: 18px 20px; }
  .tagline { font-size: 20px; margin: 30px 0; }
  .video-grid--2,
  .video-grid--3 { grid-template-columns: 1fr; }
  .gallery-item video { height: 180px; }
}