Polish operation form readability

frontend/src/styles/app.css

@@ -2148,16 +2148,69 @@ button.entity-card {
   background: #ffffff;
 }
 
+.dataset-tool-heading {
+  margin: 0;
+  font-size: 0.92rem;
+  line-height: 1.25;
+}
+
+.dataset-tool-helper {
+  margin: 0;
+  color: var(--muted);
+  font-size: 0.82rem;
+  line-height: 1.38;
+  overflow-wrap: anywhere;
+}
+
+.dataset-tool-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
+  gap: 0.52rem;
+}
+
 .dataset-tool-group label {
   min-width: 0;
 }
 
+.dataset-tool-field {
+  display: grid;
+  gap: 0.22rem;
+  min-width: 0;
+}
+
+.dataset-tool-label {
+  color: var(--text);
+  font-size: 0.78rem;
+  font-weight: 800;
+  line-height: 1.25;
+}
+
 .dataset-tool-group input,
 .dataset-tool-group select {
   width: 100%;
   min-width: 0;
 }
 
+.dataset-tool-error {
+  margin: 0;
+  border: 1px solid rgba(153, 27, 27, 0.24);
+  border-radius: 8px;
+  padding: 0.52rem 0.62rem;
+  background: rgba(153, 27, 27, 0.07);
+  color: var(--danger);
+  font-size: 0.82rem;
+  font-weight: 750;
+  line-height: 1.35;
+  overflow-wrap: anywhere;
+}
+
+.dataset-tool-action-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.5rem;
+  align-items: center;
+}
+
 .dataset-tool-group button {
   width: fit-content;
   max-width: 100%;