.research-stages-nav,
.research-stage {
  --research-secondary-color: #62626a;
}

html[data-theme="dark"] .research-stages-nav,
html[data-theme="dark"] .research-stage {
  --research-secondary-color: #b3b3b3;
}

.research-stages-nav {
  margin: 0 0 1.75rem;
  padding: 1rem 0;
  border-block: 1px solid var(--global-divider-color);
}

.research-stages-nav ol {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.research-stages-nav a {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.3rem 0;
  color: var(--global-text-color);
  text-decoration: none;
}

.research-stage-number {
  flex: 0 0 2rem;
  width: 2rem;
  color: var(--global-theme-color);
  font-size: 0.875rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.7;
}

.research-stage-nav-text {
  min-width: 0;
  line-height: 1.45;
}

.research-stage-nav-text strong {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
}

.research-stage {
  margin-top: 1.75rem;
  scroll-margin-top: 6rem;
}

.research-stage + .research-stage {
  padding-top: 1.5rem;
  border-top: 1px solid var(--global-divider-color);
}

.research-stage-header {
  margin-bottom: 0.5rem;
}

.research-stage-header h2 {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 500;
  line-height: 1.5;
}

.research-stage-purpose {
  font-size: 1rem;
  font-weight: 400;
}

.research-work + .research-work {
  margin-top: 1.25rem;
}

.research-work-venue {
  margin: 0 0 0.5rem;
  color: var(--research-secondary-color);
  font-size: 0.875rem;
  line-height: 1.6;
}

.research-work-summary {
  margin: 0;
  line-height: 1.65;
}

.research-publication-figures {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  max-width: 720px;
  margin: 1rem auto 0;
}

.research-publication-figures--multiple {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: none;
}

#signal-preprocessing .research-publication-figures,
#sensing-model-development .research-publication-figures {
  width: 50%;
  max-width: 360px;
}

.research-publication-figure {
  min-width: 0;
  margin: 0;
}

.research-publication-image {
  display: flex;
  align-items: center;
  padding: 0.35rem;
  background: #fff;
  border: 1px solid var(--global-divider-color);
  border-radius: 0.25rem;
}

.research-publication-figures--multiple .research-publication-image {
  aspect-ratio: 2.65;
}

.research-publication-image img {
  display: block;
  width: 100%;
  height: auto;
}

.research-publication-figures--multiple img {
  height: 100%;
  object-fit: contain;
}

.research-publication-figure figcaption {
  margin-top: 0.45rem;
  text-align: center;
  font-size: 0.875rem;
  line-height: 1.5;
}

.research-work-link {
  color: var(--global-text-color);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--global-divider-color);
  text-underline-offset: 0.15em;
}

.research-stages-nav a:hover,
.research-work-link:hover {
  color: var(--global-theme-color);
}

.research-stages-nav a:focus-visible,
.research-work a:focus-visible {
  outline: 2px solid var(--global-theme-color);
  outline-offset: 4px;
  border-radius: 2px;
}

@media (max-width: 767.98px) {
  .research-stages-nav ol {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.75rem;
  }

  .research-stages-nav a {
    min-height: 44px;
  }
}

@media (max-width: 575.98px) {
  .research-publication-figures--multiple {
    grid-template-columns: minmax(0, 1fr);
  }

  .research-publication-figures--multiple .research-publication-image {
    aspect-ratio: auto;
  }

  .research-publication-figures--multiple img {
    height: auto;
  }

  .research-stage-header h2 {
    font-size: 1.25rem;
  }

  .research-stage-number {
    flex-basis: 1.65rem;
    width: 1.65rem;
  }
}