/* RSS Paper Homepage — clean, readable, GitHub Pages friendly */

:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --text: #1c1917;
  --text-muted: #57534e;
  --accent: #1a1a2e;
  --accent-soft: #e7e5e4;
  --border: #e7e5e4;
  --font-title: "DM Serif Display", Georgia, serif;
  --font-body: "Source Sans 3", -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  margin: 0;
  min-height: 100vh;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 0;
  margin-bottom: 2rem;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.venue {
  font-weight: 600;
  letter-spacing: 0.02em;
}

.year {
  opacity: 0.9;
  font-size: 0.95rem;
}

/* Title & authors */
.paper-title {
  font-family: var(--font-title);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 400;
  line-height: 1.25;
  margin: 0 0 0.25rem;
  color: var(--text);
}

.paper-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin: 0 0 1.25rem;
}

.authors {
  list-style: none;
  padding: 0;
  margin: 0 0 0.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
}

.authors li {
  font-size: 1rem;
}

.authors a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.authors a:hover {
  text-decoration: underline;
}

.authors sup {
  font-size: 0.7em;
  margin-left: 0.15rem;
}

.affiliations {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.affiliations li {
  margin-bottom: 0.2rem;
}

.affiliations .note {
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

.affiliations .equal {
  font-weight: 600;
  margin-left: 0.1rem;
}

/* Compact one-line affiliations */
.affiliations--compact {
  margin: 0 0 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.subsection-title {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.25rem 0 0.5rem;
  color: var(--text);
}

.subsection-title:first-of-type {
  margin-top: 0.5rem;
}

.ood-objects-label {
  margin-top: 0.75rem;
  margin-bottom: 0.25rem;
}

/* Hero figure — compact, no black edges */
.hero-figure {
  margin-bottom: 1.5rem;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  vertical-align: top;
}

.caption {
  padding: 0.5rem 0.75rem;
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* Buttons */
.action-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #2d2d44;
}

.btn-secondary {
  background: var(--accent-soft);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: #d6d3d1;
}

/* Sections */
section {
  margin-bottom: 2rem;
}

section h2 {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 400;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.abstract p,
.highlights ul {
  margin: 0;
  color: var(--text);
}

.highlights ul {
  padding-left: 1.25rem;
}

.highlights li {
  margin-bottom: 0.4rem;
}

/* Section description */
.section-desc {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Media rows: 1×3, 1×2, 1×1 — compact, no black bars */
.media-row {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

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

/* Horizontal scroll: one large video at a time (Task Demos, Robustness phone disturb) */
.media-row-scroll {
  display: flex;
  flex-wrap: nowrap;
  gap: 1rem;
  overflow-x: auto;
  overflow-y: hidden;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.media-row-scroll figure {
  flex: 0 0 auto;
  scroll-snap-align: start;
  min-width: min(85vw, 520px);
  max-width: min(85vw, 520px);
}

.media-row-scroll figure video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

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

/* Q-value: keep two curves side-by-side (parallel), show full image */
.q-value .media-row-2 {
  grid-template-columns: 1fr 1fr;
  align-items: start;
}

.q-value figure img {
  object-fit: contain;
  background: var(--surface);
}

.media-row-1 {
  grid-template-columns: 1fr;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* Continuous operation: single video, allow wider for compilation */
.continuous-operation .media-row-1 {
  max-width: 720px;
}

/* Q-value: text aligns with other sections; figures smaller and centered */
.q-value .media-row-1 {
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* Center all media rows (video/image blocks) within section */
.media-row {
  justify-items: center;
}

.media-row figure {
  margin: 0;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

/* Video: fill fixed aspect ratio, no black letterboxing */
.media-row figure video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  vertical-align: top;
}

.media-row figure img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
  object-fit: cover;
}

.media-row figure object {
  display: block;
  width: 100%;
  min-height: 280px;
  background: var(--surface);
  vertical-align: top;
}

/* Final Results: no border around PDF embeds (avoid black frame) */
.final-results figure {
  border: none;
  box-shadow: none;
}

.final-results figure object {
  border: none;
  outline: none;
}

.media-row figure figcaption {
  padding: 0.4rem 0.6rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* Method section: intro + teaser */
.method .hero-figure {
  margin-top: 1rem;
}

.method p {
  margin: 0;
  color: var(--text);
}

/* Citation */
.bibtex {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 0;
  overflow-x: auto;
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text);
}

.bibtex code {
  white-space: pre;
}

/* Footer */
.site-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 640px) {
  .action-links {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }

  .media-row-3,
  .media-row-2 {
    grid-template-columns: 1fr;
  }

  .media-row-1 {
    max-width: none;
  }
}