/* WebTools — usability helpers (non-breaking add-on) */
.howto-panel {
  margin-bottom: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-muted);
  overflow: hidden;
}
.howto-panel summary {
  padding: 12px 16px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.howto-panel summary::-webkit-details-marker { display: none; }
.howto-panel summary::after {
  content: "How to use";
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-a10);
  padding: 4px 10px;
  border-radius: 999px;
}
.howto-panel[open] summary::after { content: "Hide"; }
.howto-body {
  padding: 0 16px 16px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.howto-body ol {
  margin: 8px 0 0 1.2em;
  padding: 0;
}
.howto-body li { margin-bottom: 6px; }
.howto-body .tip {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--info-bg);
  color: var(--info);
  font-size: 0.875rem;
}
.tool-empty-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 8px;
}