Key sheet: card redesign matching the tip section

Price-rating legend now renders as five accent cards (tip-section style):
Best value (green, checkmark) / Okay (orange, equal) / Pricey (red,
exclamation) each with a RAG dot + threshold (≤1.5p / ≤4p / >4p) on the
right in the row's accent colour; TOP (blue capsule) and star (yellow)
as accent cards below a divider. Footer: 'Colours match each station's
rating on the list'. Copy split into title/blurb keys in Localizable.
Sheet chrome (medium detent, Done, info button) unchanged.

FuelBoard/StationsView.swift

@@ -193,39 +193,54 @@ struct StationsView: View {
             .sheet(isPresented: $showKey) {
                 NavigationStack {
                     List {
-                        Section("Key") {
+                        Section {
-                            HStack(spacing: 8) {
+                            VStack(spacing: 10) {
-                                Circle().fill(.green).frame(width: 12, height: 12)
+                                keyCard(
-                                Text("Best value — within 1.5p of the cheapest")
+                                    icon: "checkmark.circle.fill", color: .green,
-                                    .font(.caption)
+                                    title: "Best value", blurb: "Within 1.5p of the cheapest",
-                            }
+                                    threshold: "≤1.5p")
-                            HStack(spacing: 8) {
+                                keyCard(
-                                Circle().fill(.orange).frame(width: 12, height: 12)
+                                    icon: "equal.circle.fill", color: .orange,
-                                Text("Okay — within 4p of the cheapest")
+                                    title: "Okay", blurb: "Within 4p of the cheapest",
-                                    .font(.caption)
+                                    threshold: "≤4p")
-                            }
+                                keyCard(
-                            HStack(spacing: 8) {
+                                    icon: "exclamationmark.circle.fill", color: .red,
-                                Circle().fill(.red).frame(width: 12, height: 12)
+                                    title: "Pricey", blurb: "More than 4p over the cheapest",
-                                Text("Pricey — more than 4p over the cheapest")
+                                    threshold: ">4p")
-                                    .font(.caption)
+                                Rectangle()
-                            }
+                                    .fill(Color(.separator))
-                            HStack(spacing: 8) {
+                                    .frame(height: 0.5)
-                                Text("TOP")
+                                    .padding(.vertical, 2)
-                                    .font(.caption2.bold())
+                                HStack(spacing: 12) {
-                                    .padding(.horizontal, 5)
+                                    Text("TOP")
-                                    .padding(.vertical, 1)
+                                        .font(.caption2.bold())
-                                    .background(Capsule().fill(.blue.opacity(0.15)))
+                                        .padding(.horizontal, 7)
-                                    .foregroundStyle(.blue)
+                                        .padding(.vertical, 3)
-                                Text("Top result for the current sort")
+                                        .background(Capsule().fill(.blue.opacity(0.16)))
-                                    .font(.caption)
+                                        .foregroundStyle(.blue)
-                            }
+                                    Text("Top result for the current sort")
-                            HStack(spacing: 8) {
+                                        .font(.subheadline.weight(.semibold))
-                                Image(systemName: "star.fill")
+                                    Spacer(minLength: 0)
-                                    .font(.caption2)
+                                }
-                                    .foregroundStyle(.yellow)
+                                .keyCardFill(color: .blue)
-                                Text("Star a station to add it to Favourites")
+                                HStack(spacing: 12) {
-                                    .font(.caption)
+                                    Image(systemName: "star.fill")
+                                        .font(.title3)
+                                        .foregroundStyle(.yellow)
+                                        .frame(width: 34)
+                                    Text("Star a station to add it to Favourites")
+                                        .font(.subheadline.weight(.semibold))
+                                    Spacer(minLength: 0)
+                                }
+                                .keyCardFill(color: .yellow)
+                                Text("Colours match each station's rating on the list")
+                                    .font(.footnote)
+                                    .foregroundStyle(.secondary)
+                                    .frame(maxWidth: .infinity)
+                                    .padding(.top, 4)
                             }
+                            .listRowBackground(Color.clear)
+                            .listRowInsets(EdgeInsets(top: 4, leading: 16, bottom: 4, trailing: 16))
                         }
                     }
                     .navigationTitle("Key")
@@ -240,6 +255,47 @@ struct StationsView: View {
             }
         }
     }
+
+    /// One price-rating card for the Key sheet: accent icon, title + blurb,
+    /// and the rating threshold in the accent colour (mirrors the tip cards).
+    private func keyCard(icon: String, color: Color, title: String, blurb: String, threshold: String) -> some View {
+        HStack(spacing: 12) {
+            Image(systemName: icon)
+                .font(.title3)
+                .foregroundStyle(color)
+                .frame(width: 34)
+            VStack(alignment: .leading, spacing: 2) {
+                Text(LocalizedStringKey(title)).font(.headline)
+                Text(LocalizedStringKey(blurb))
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+            }
+            Spacer(minLength: 8)
+            HStack(spacing: 6) {
+                Circle().fill(color).frame(width: 10, height: 10)
+                Text(threshold)
+                    .font(.headline.weight(.bold))
+                    .foregroundStyle(color)
+                    .monospacedDigit()
+            }
+        }
+        .padding(.horizontal, 14)
+        .padding(.vertical, 10)
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .keyCardFill(color: color)
+    }
+}
+
+/// Card background shared by the Key sheet cards — subtle accent tint over
+/// the grouped background, matching the tip-section card style.
+private extension View {
+    func keyCardFill(color: Color) -> some View {
+        background(
+            RoundedRectangle(cornerRadius: 12)
+                .fill(Color(.secondarySystemGroupedBackground))
+                .overlay(RoundedRectangle(cornerRadius: 12).fill(color.opacity(0.08)))
+        )
+    }
 }
 
 // MARK: - Fuel-type iconography (app target only — FuelStore.swift is Foundation-only)

FuelBoard/en.lproj/Localizable.strings

@@ -23,11 +23,15 @@
 "Show %lld more (%lld remaining)" = "Show %lld more (%lld remaining)";
 "All %lld stations shown" = "All %lld stations shown";
 "Key" = "Key";
-"Best value — within 1.5p of the cheapest" = "Best value — within 1.5p of the cheapest";
+"Best value" = "Best value";
-"Okay — within 4p of the cheapest" = "Okay — within 4p of the cheapest";
+"Within 1.5p of the cheapest" = "Within 1.5p of the cheapest";
-"Pricey — more than 4p over the cheapest" = "Pricey — more than 4p over the cheapest";
+"Okay" = "Okay";
+"Within 4p of the cheapest" = "Within 4p of the cheapest";
+"Pricey" = "Pricey";
+"More than 4p over the cheapest" = "More than 4p over the cheapest";
 "Top result for the current sort" = "Top result for the current sort";
 "Star a station to add it to Favourites" = "Star a station to add it to Favourites";
+"Colours match each station's rating on the list" = "Colours match each station's rating on the list";
 
 /* Favourites tab */
 "No favourites yet" = "No favourites yet";