.latex-runner {
  border: 1px solid #333;
  border-radius: 6px;
  overflow: hidden;
  margin: 1.5rem 0;
}

.latex-runner-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  background: #1e1e1e;
  color: #ccc;
}

.latex-runner-label {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.6;
  flex: 1;
}

.latex-runner-engine {
  background: #2d2d2d;
  color: #ccc;
  border: 1px solid #444;
  border-radius: 4px;
  padding: 0.2rem 0.4rem;
  font-size: 0.78rem;
  cursor: pointer;
}

.latex-runner-run {
  background: #939bc9;
  color: #fff;
  border: none;
  padding: 0.25rem 0.85rem;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.latex-runner-run:hover    { background: #7c85bb; }
.latex-runner-run:active   { background: #6970ab; }
.latex-runner-run:disabled { background: #939bc9; opacity: 0.65; cursor: default; }

/* CodeMirror overrides */
.latex-runner .CodeMirror,
.latex-runner .CodeMirror-gutters {
  background: #1e1e1e !important;
  border-top: 1px solid #2e2e2e;
  font-family: 'Courier New', 'Consolas', monospace;
  font-size: 0.875rem;
  line-height: 1.65;
  height: auto;
}

.latex-runner .CodeMirror-scroll {
  min-height: 140px;
}

.latex-runner .CodeMirror-gutters {
  border-right: 1px solid #2e2e2e !important;
}

.latex-runner .CodeMirror-linenumber {
  color: #555;
}

.latex-runner iframe {
  display: none;
  width: 100%;
  height: 480px;
  border: none;
  border-top: 1px solid #333;
  background: #fff;
}

.latex-runner iframe.visible { display: block; }