/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', Arial, sans-serif; color: #222; line-height: 1.6; }

/* === SECTION LAYOUT ===
   Each <section> gets 64px top/bottom padding and a centered 900px content column.
   Odd sections (1st, 3rd, 5th…) are white; even sections are light gray. */
.section { padding: 64px 20px; }
.section-inner { max-width: 900px; margin: 0 auto; }
section:nth-of-type(odd)  { background: #ffffff; }
section:nth-of-type(even) { background: #F4F5F8; }

/* === SECTION HEADING === */
h1.section-title {
  text-align: center;
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 32px;
  color: #1a1a1a;
}


/* ==============================
   HEADER BLOCK
============================== */
header { background: #fff; text-align: center; padding: 64px 20px 48px; }

.paper-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.35;
  color: #111;
  max-width: 820px;
  margin: 0 auto 28px;
}

/* --- Authors --- */
.authors { font-size: 1.05rem; margin-bottom: 24px; color: #333; }
.authors a { color: #333; text-decoration: none; }
.authors a:hover { text-decoration: underline; }
.corresponding { display: block; margin-top: 6px; font-size: 0.82rem; color: #999; }

/* --- Institution logos --- */
.affiliations {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 48px;
  flex-wrap: wrap;
  margin: 24px auto 32px;
}
.affiliation {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  max-width: 140px;
}
.affiliation .number { font-size: 0.85rem; font-weight: 600; color: #666; }
.affiliation img    { height: 50px; width: auto; object-fit: contain; }
.affiliation .name  { font-size: 0.78rem; color: #777; text-align: center; line-height: 1.4; }

/* --- Link buttons --- */
.links { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }
.link-btn {
  display: inline-block;
  padding: 8px 22px;
  border: 1.5px solid #1f3b6f;
  border-radius: 999px;
  background: #1f3b6f;
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
  cursor: pointer;
}
.link-btn:hover { background: #162d55; border-color: #162d55; }

/* --- BibTeX popup (shown when BibTeX button is clicked) --- */
pre.bibtex {
  text-align: left;
  background: #eef0f5;
  border-radius: 8px;
  padding: 20px 24px;
  margin-top: 20px;
  font-family: 'Courier New', monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
}


/* ==============================
   SECTION CONTENT STYLES
============================== */

/* TL;DR callout */
.tldr-box {
  background: #eef2f8;
  border-left: 4px solid #1f3b6f;
  border-radius: 0 8px 8px 0;
  padding: 20px 24px;
}
.tldr-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #1f3b6f;
  margin-bottom: 8px;
}
.tldr-text {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #333;
}
.tldr-list {
  margin: 0;
  padding-left: 1.3em;
}
.tldr-list li + li {
  margin-top: 8px;
}

/* --- Coming Soon --- */
.coming-soon {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  color: #1a1a1a;
  padding: 40px 0;
}

/* Abstract body text */
.abstract-text {
  font-size: 1rem;
  line-height: 1.9;
  color: #444;
  text-align: justify;
}

/* Local video player */
.section-video {
  display: block;
  width: 100%;
  max-height: 560px;
  border-radius: 8px;
  background: #000;
}

/* Placeholder box for sections not yet filled in */
.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  border: 2px dashed #ccc;
  border-radius: 10px;
  color: #bbb;
  font-size: 1rem;
}