.prepare-banner {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: linear-gradient(180deg, #0a5555 0%, #0d6e6e 100%);
  color: #f4f7fb;
  box-shadow: 0 2px 12px rgba(10, 85, 85, 0.28);
  animation: prepare-banner-in 0.45s ease-out;
}

.prepare-banner-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem 1rem;
  text-align: center;
}

.prepare-message {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  font-family: var(--ac-body, Georgia, serif);
}

.prepare-progress {
  height: 8px;
  max-width: 360px;
  margin: 0 auto 0.4rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  overflow: hidden;
}

.prepare-progress .progress-bar {
  background-color: #9fd8d4;
}

.prepare-status {
  margin: 0;
  font-size: 0.8rem;
  opacity: 0.85;
}

.prepare-banner-error {
  background: linear-gradient(180deg, #5c2b2b 0%, #7a3a3a 100%);
}

.meta-page {
  padding-bottom: 3rem;
  transition: opacity 0.3s ease;
}

.meta-arxiv-id {
  margin-top: 1.5rem;
  margin-bottom: 0;
  color: var(--ac-muted, #5a6575);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9rem;
}

.meta-page .blog-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1.25;
}

.meta-section-label {
  font-family: var(--ac-display, Georgia, serif);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--ac-ink, #1a2433);
}

.meta-abstract {
  font-family: var(--ac-body, Georgia, serif);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ac-ink, #1a2433);
}

html.page-transitioning .meta-page,
html.page-transitioning .prepare-banner {
  opacity: 0;
  transition: opacity 0.28s ease;
}

@keyframes prepare-banner-in {
  from {
    transform: translateY(-8px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}