Add vector change detection foundation

frontend/src/styles/app.css

@@ -79,6 +79,73 @@ ul {
   border-radius: 8px;
 }
 
+.muted {
+  color: var(--muted);
+}
+
+.eyebrow {
+  margin: 0 0 0.2rem;
+  color: var(--muted);
+  font-size: 0.75rem;
+  font-weight: 700;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+
+.panel-header {
+  display: flex;
+  gap: 0.75rem;
+  align-items: flex-start;
+  justify-content: space-between;
+}
+
+.panel-header button {
+  width: auto;
+  min-width: 9rem;
+}
+
+.form-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
+  gap: 0.75rem;
+}
+
+.checkbox-row {
+  display: flex;
+  gap: 0.5rem;
+  align-items: center;
+}
+
+.checkbox-row input {
+  width: auto;
+  margin: 0;
+}
+
+.summary-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
+  gap: 0.65rem;
+  margin-top: 0.75rem;
+}
+
+.summary-grid > div {
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  padding: 0.6rem;
+}
+
+.metric {
+  display: block;
+  font-size: 1.4rem;
+  font-weight: 800;
+}
+
+.compact-list {
+  padding-left: 1rem;
+  color: var(--muted);
+  font-size: 0.9rem;
+}
+
 .map-container {
   width: 100%;
   height: 460px;