/* ============================================================
   Academic project page — Nerfies / SatMAE style
   Pure white, centered, minimal, typographic
   ============================================================ */

:root {
  --bg:         #ffffff;
  --bg-alt:     #f7f8fa;
  --text:       #1a1a1a;
  --text-soft:  #3a3a3a;
  --text-dim:   #6b6b6b;
  --rule:       #e4e7ec;
  --link:       #2563eb;
  --link-hover: #1d4ed8;
  --accent-bg:  #f0f4ff;

  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --serif: 'Noto Serif', 'Iowan Old Style', Charter, Georgia, serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --max:    1040px;
  --narrow: 780px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0f12; --bg-alt: #15171c;
    --text: #eaeaea; --text-soft: #c8c8c8; --text-dim: #8a8e96;
    --rule: #252932;
    --link: #7aa7ff; --link-hover: #a3c1ff;
    --accent-bg: #1a2238;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}
.container.narrow { max-width: var(--narrow); }
.container.no-pad { padding-left: 0; padding-right: 0; }

a {
  color: var(--link);
  text-decoration: none;
  transition: color .15s ease;
}
a:hover { color: var(--link-hover); text-decoration: underline; }

em { font-style: italic; }
strong { font-weight: 600; color: var(--text); }

/* ============================= HERO ============================= */
.hero {
  padding: 80px 0 56px;
  text-align: center;
}
@media (max-width: 480px) {
  .hero { padding: 48px 0 36px; }
}

.title {
  font-family: var(--sans);
  font-size: clamp(30px, 4.2vw, 44px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--text);
  margin: 0 auto 22px;
  max-width: 920px;
}

.venue {
  color: var(--text-dim);
  font-size: 15px;
  margin: 0 0 28px;
  letter-spacing: 0.01em;
}

.authors {
  font-size: 20px;
  color: var(--text);
  margin: 0 0 6px;
  font-weight: 500;
}
.authors a { color: var(--link); }
.authors sup { font-weight: 400; font-size: 12px; color: var(--text-dim); }

.affils {
  color: var(--text-soft);
  font-size: 16px;
  margin: 0 0 36px;
}
.affils sup { font-size: 12px; color: var(--text-dim); }

/* buttons */
.buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--text);
  transition: transform .1s ease, background .15s ease, color .15s ease, box-shadow .15s ease;
}
.pill:hover {
  background: var(--text-soft);
  color: var(--bg);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}
.pill i { font-size: 14px; }
.pill.disabled {
  background: var(--bg-alt);
  color: var(--text-dim);
  border-color: var(--rule);
  pointer-events: none;
  opacity: 0.75;
}
@media (prefers-color-scheme: dark) {
  .pill { background: var(--text); color: var(--bg); border-color: var(--text); }
  .pill:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.5); }
  .pill.disabled { background: var(--bg-alt); color: var(--text-dim); border-color: var(--rule); }
}

/* ============================= TEASER ============================= */
.teaser {
  padding: 0 0 72px;
}
.video-embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 fallback for Safari < 15 */
  aspect-ratio: 16 / 9;
  height: 0;
  border-radius: 8px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 10px 40px -12px rgba(0,0,0,0.18);
}
/* When aspect-ratio is supported, allow natural height and drop the padding hack */
@supports (aspect-ratio: 16 / 9) {
  .video-embed { padding-bottom: 0; height: auto; }
}
.video-embed iframe {
  position: absolute;
  top: 0; left: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.teaser .caption {
  margin: 20px auto 0;
  max-width: 780px;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.6;
  text-align: center;
}

/* ============================= SECTIONS ============================= */
.section {
  padding: 72px 0;
  border-top: 1px solid var(--rule);
}
.section.alt { background: var(--bg-alt); }

.section h2 {
  font-family: var(--sans);
  font-size: clamp(24px, 2.8vw, 32px);
  font-weight: 700;
  margin: 0 0 24px;
  color: var(--text);
  text-align: center;
  letter-spacing: -0.01em;
}
.section h3 {
  font-family: var(--sans);
  font-size: 20px;
  font-weight: 600;
  margin: 48px 0 12px;
  color: var(--text);
}
.section h3:first-of-type { margin-top: 24px; }

.section p {
  color: var(--text-soft);
  margin: 0 0 16px;
  line-height: 1.75;
  font-size: 16.5px;
}
.section p.sub {
  color: var(--text-dim);
  font-size: 15px;
  margin: 0 0 20px;
  font-style: italic;
}

/* ============================= FINDINGS ============================= */
.findings {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  counter-reset: f;
}
.findings li {
  counter-increment: f;
  padding: 22px 0 22px 56px;
  position: relative;
  border-bottom: 1px solid var(--rule);
}
.findings li:last-child { border-bottom: none; }
.findings li::before {
  content: counter(f);
  position: absolute;
  top: 22px;
  left: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--text);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--mono);
}
.findings h3 {
  font-size: 17.5px;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--text);
}
.findings p {
  margin: 0 !important;
  color: var(--text-soft);
  font-size: 15.5px;
  line-height: 1.65;
}

/* ============================= FIGURES ============================= */
figure {
  margin: 32px 0;
  padding: 0;
  text-align: center;
}
figure img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 4px;
}
figcaption {
  margin: 14px auto 0;
  max-width: 780px;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.6;
  text-align: left;
}
figcaption strong { color: var(--text); font-weight: 600; }

figure.narrow-fig img { max-width: 720px; }

.fig-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin: 24px 0;
}
.fig-grid-2 figure { margin: 0; }
@media (max-width: 820px) {
  .fig-grid-2 { grid-template-columns: 1fr; gap: 32px; }
}

/* ============================= SPEC TABLE ============================= */
.spec {
  width: 100%;
  margin: 20px 0 24px;
  border-collapse: collapse;
  font-size: 15.5px;
}
.spec th, .spec td {
  padding: 12px 16px;
  border-top: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}
.spec tr:last-child th,
.spec tr:last-child td { border-bottom: 1px solid var(--rule); }
.spec th {
  width: 160px;
  font-weight: 600;
  color: var(--text);
  background: var(--bg);
}
.spec td { color: var(--text-soft); }
@media (max-width: 600px) {
  .spec tr { display: block; border-top: 1px solid var(--rule); padding: 10px 0; }
  .spec tr:last-child { border-bottom: 1px solid var(--rule); }
  .spec th {
    width: auto; display: block;
    padding: 0 4px 4px;
    border-top: none; border-bottom: none;
    color: var(--text-dim);
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
  .spec td { display: block; padding: 0 4px; border-top: none; }
}

/* ============================= BIBTEX ============================= */
.bib-block { margin: 12px 0 0; }
.bib-block + .sub { margin-top: 32px; }

pre {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 20px 24px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text);
  margin: 0;
}
pre code { font-family: inherit; }
@media (prefers-color-scheme: dark) {
  pre { background: #0b0c0f; }
}

.copy-btn {
  margin-top: 14px;
  padding: 8px 16px;
  background: var(--bg);
  border: 1px solid var(--rule);
  color: var(--text);
  font-family: var(--sans);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 999px;
  transition: border-color .15s ease, background .15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.copy-btn:hover { border-color: var(--text); background: var(--bg-alt); }
.copy-btn i { font-size: 13px; }

/* ============================= FOOTER ============================= */
footer {
  padding: 48px 0 64px;
  text-align: center;
  border-top: 1px solid var(--rule);
  background: var(--bg-alt);
}
footer p { color: var(--text-dim); font-size: 14px; margin: 6px 0; line-height: 1.6; }
footer .muted { color: var(--text-dim); font-size: 13px; }
footer a { color: var(--link); }

/* ============================= MISC ============================= */
::selection { background: var(--accent-bg); color: var(--text); }

mjx-container { font-size: 1em !important; }

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}