header,
.navbar {
  position: sticky;
  top: 0;
  z-index: 1030;
}

.navbar {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

@media (max-width: 768px) {
  .program-table .program-time {
    width: 2.3rem !important;
    min-width: 2.0rem !important;
    padding-left: 0.1rem !important;
    padding-right: 0.1rem !important;
    white-space: nowrap;
  }
}
.program-table-container {
  overflow-x: visible !important;
}

.program-table {
  width: 100% !important;
  max-width: 1100px;
  margin-left: auto !important;
  margin-right: auto !important;
}

.program-table .program-space {
  display: none;
}

.program-table .program-time {
  width: 4rem;
  min-width: 3rem;
  white-space: nowrap;
}

.program-table .program-talk {
  width: calc(100% - 3.2 rem) !important;
  min-width: 0 !important;
}

@media (min-width: 992px) {
  body:has(.program-table) main.container {
    max-width: 1400px;
  }
   .program-table .program-time {
    width: 6.0rem !important;
    min-width: 5.0rem !important;
    padding-left: 0.1rem !important;
    padding-right: 0.1rem !important;
    white-space: nowrap;
  }

}

#main img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  margin-left: auto;
  margin-right: auto;
}

#main {
  max-width: 900px;
}

/* Title area */
#main h1 {
  font-size: clamp(2.4rem, 7vw, 4.8rem);
  line-height: 1.02;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-top: 1.5rem;
  margin-bottom: 1.25rem;
}

/* Speaker name under title */
#main h1 + p,
#main .speaker,
#main .speakers {
  font-size: 1.35rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
}

/* Section headings */
#main h2,
#main h3 {
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

/* Reading text */
#main p,
#main li {
  font-size: 1.1rem;
  line-height: 1.7;
}

/* Make metadata feel like Sway chips */
#main .badge,
#main .btn,
#main .talk-meta .poster-meta span {
  border-radius: 999px;
}

/* Images */
#main img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  margin: 2rem auto;
  border-radius: 0.4rem;
}

/* Slightly narrower body on large screens */
@media (min-width: 992px) {
  #main {
    max-width: 820px;
  }
}

/* -------------------------------------------------
   Talk / abstract pages
   ------------------------------------------------- */
.talk-hero {
  margin-top: 0.5rem;
  margin-bottom: 2.5rem;
  padding: 2rem 0 1.5rem;
}

.talk-hero h1 {
  font-family: inherit;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 1rem 0 1.25rem;
}

.talk-speakers {
  font-family: inherit;
  font-size: 1.15rem;
  font-weight: 400;
  margin-bottom: 1.25rem;
}

.talk-track,
.talk-tag,
.talk-program-info {
  font-family: inherit;
}

@media (max-width: 768px) {
  .talk-hero h1 {
    font-size: 2rem;
    line-height: 1.15;
  }

  .talk-speakers {
    font-size: 1.05rem;
  }
}

/* Programme day selector as compact calendar strip */

.nav-pills {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.35rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
  margin-bottom: 1.5rem;
  scrollbar-width: none;
}

.nav-pills::-webkit-scrollbar {
  display: none;
}

.nav-pills .nav-link {
  flex: 0 0 auto;
  border-radius: 0.7rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--bs-border-color);
  background: transparent;
  color: var(--bs-body-color);
  font-weight: 500;
  line-height: 1.1;
}

.nav-pills .nav-link.active {
  background: var(--bs-body-color);
  color: var(--bs-body-bg);
  border-color: var(--bs-body-color);
}

.nav-pills .nav-link:hover {
  background: var(--bs-tertiary-bg);
}

@media (max-width: 768px) {
  .nav-pills {
    gap: 0.3rem;
    margin-left: -0.25rem;
    margin-right: -0.25rem;
    padding-left: 0.25rem;
    padding-right: 0.25rem;
  }

  .nav-pills .nav-link {
    font-size: 0.88rem;
    padding: 0.4rem 0.65rem;
  }
}

.poster-group {
  max-width: 1000px;
}

.poster-group-title {
  display: inline-block;
  padding: 0.45rem 0.8rem;
  margin-bottom: 0.8rem;

  background: var(--bs-secondary-bg);
  border-left: 4px solid var(--bs-secondary);
  font-size: 1.15rem;
  font-weight: 700;
}

.poster-item {
  border-left: 4px solid var(--bs-border-color);
  padding: 0.35rem 0 0.5rem 0.75rem;
  margin-bottom: 0.45rem;
}

.poster-title {
  display: block;
  color: var(--bs-body-color);
  text-decoration: none;

  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.35;
}

.poster-title:hover {
  text-decoration: underline;
}

.poster-authors {
  margin-top: 0.25rem;
  font-size: 0.95rem;
  color: var(--bs-secondary-color);
}

.poster-item {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  border-left: 4px solid var(--bs-border-color);
  padding: 0.45rem 0 0.55rem 0.75rem;
  margin-bottom: 0.45rem;
}

.poster-number {
  flex: 0 0 2rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--bs-secondary-color);
}

.poster-list-content {
  min-width: 0;
}

/* Home-page navigation buttons */
.home-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.home-action-btn {
  border: 0;
  border-radius: 0.7rem;
  padding: 0.65rem 1rem;
  font-weight: 500;
  background: var(--bs-tertiary-bg);
  color: var(--bs-body-color);
  text-decoration: none;
  box-shadow: none;
}

.home-action-btn:hover {
  background: var(--bs-secondary-bg);
  color: var(--bs-body-color);
}

@media print {

  .navbar,
  footer,
  .talk-navigation,
  .d-print-none {
    display: none !important;
  }

  #main {
    max-width: none !important;
  }

  .book-entry {
    break-before: page;
    overflow: visible !important;
  }

  .book-entry img {
    max-width: 100%;
    max-height: 22cm;
    object-fit: contain;
  }

  h1, h2, h3 {
    break-after: avoid;
  }

  p {
    orphans: 3;
    widows: 3;
  }

  /* Keep Markdown-generated figures on one page */
  .book-entry p:has(> img) {
    break-inside: avoid !important;
    page-break-inside: avoid !important;
  }

  .book-entry p:has(> img) img {
    display: block;
    width: auto;
    max-width: 100% !important;
    max-height: 230mm !important;
    height: auto !important;
    object-fit: contain;
    margin: 0 auto;
  }

  

  @page {
    size: A4;
    margin: 18mm 16mm 18mm 16mm;
  }
}