/* Research page card grid. Each project is a col-md-6 card; pairs of
   cards sit side-by-side at desktop and collapse to one-per-row at
   smaller widths via Bootstrap 3's responsive grid. Uses flexbox on the
   row so paired cards match height even when bodies are different
   lengths (Bootstrap 3's float-based grid stair-steps otherwise). */

.container {
  max-width: 1100px;
}

.research-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
}

.research-card {
  /* Bootstrap's .col-md-6 has padding: 0 15px (the grid gutter).
     Bump to 30px so the visible inter-card whitespace is ~60px
     instead of the default ~30px. */
  padding-left: 30px;
  padding-right: 30px;
  margin-bottom: 2.5em;
}

/* Inner padding offset so content doesn't visually butt against the
   wider gutter. The thumbnail extends to the col edge via negative
   margin so the image stays the full card width. */
.research-card > * {
  padding-left: 0;
  padding-right: 0;
}

.research-thumb {
  margin: 0 0 1em;
  padding: 0;
}

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

.research-thumb figcaption {
  font-size: 0.85em;
  color: #666;
  padding: 0.5em 0.5em 0;
  font-style: italic;
}

.research-card h2 {
  margin-top: 0;
}

.research-summary {
  margin-bottom: 0.75em;
}

.research-details {
  margin-top: 0;
}

.research-details > summary {
  display: inline-block;
  cursor: pointer;
  color: #337ab7;
  font-size: 0.9em;
  list-style: none;
  user-select: none;
}

.research-details > summary::-webkit-details-marker {
  display: none;
}

.research-details > summary::before {
  content: "\25B8";    /* ▸ closed indicator */
  margin-right: 0.4em;
}

.research-details[open] > summary::before {
  content: "\25BE";    /* ▾ open indicator */
}

/* Two-label pattern: keep both literal labels in the DOM so the
   browser/screen reader has consistent button text, and use the
   details[open] attribute to swap which one is visible. */
.research-details .show-open { display: none; }
.research-details[open] .show-closed { display: none; }
.research-details[open] .show-open { display: inline; }

.research-details > summary:hover,
.research-details > summary:focus {
  color: #23527c;
  text-decoration: underline;
}

.research-body {
  font-size: 0.95em;
  margin-top: 0.75em;
}

.research-body p:last-child {
  margin-bottom: 0;
}

/* Body figures (the secondary images embedded inline in some projects)
   should stay constrained to card width. */
.research-body figure {
  margin: 1em 0;
}

.research-body figure img {
  display: block;
  width: 100%;
  height: auto;
}

.research-body figcaption {
  font-size: 0.85em;
  color: #666;
  padding-top: 0.5em;
  font-style: italic;
}