diff --git a/Forji/Forji/Views/InstanceFormView.swift b/Forji/Forji/Views/InstanceFormView.swift
index 8a72c9e..087c7bf 100644
--- a/Forji/Forji/Views/InstanceFormView.swift
+++ b/Forji/Forji/Views/InstanceFormView.swift
@@ -2,6 +2,7 @@ import ForgejoKit
 import SwiftData
 import SwiftUI
 
+// swiftlint:disable file_length
 // swiftlint:disable:next type_body_length
 struct InstanceFormView: View {
     enum Mode: Identifiable {
@@ -23,6 +24,7 @@ struct InstanceFormView: View {
 
     @Environment(\.modelContext) private var modelContext
     @Environment(\.dismiss) private var dismiss
+    @Environment(\.accessibilityReduceMotion) private var reduceMotion
     @Query(sort: \ForgejoInstance.lastUsed, order: .reverse) private var instances: [ForgejoInstance]
     @State private var authService: AuthenticationService
 
@@ -55,6 +57,14 @@ struct InstanceFormView: View {
         self.mode = mode
     }
 
+    /// "Login"/"Save" at rest; the present-progressive form while the request runs.
+    private var buttonTitle: String {
+        if isLoading {
+            return isAddMode ? "Signing in…" : "Saving…"
+        }
+        return isAddMode ? "Login" : "Save"
+    }
+
     var body: some View {
         NavigationStack {
             Form {
@@ -144,21 +154,27 @@ struct InstanceFormView: View {
 
                 Section {
                     Button(action: handleSave) {
-                        HStack {
-                            Spacer()
+                        // A leading spinner with a status label keeps the button
+                        // full while signing in, instead of emptying it to a lone
+                        // spinner. Reduce Motion drops the morph.
+                        HStack(spacing: 8) {
                             if isLoading {
                                 ProgressView()
-                                    .progressViewStyle(.circular)
-                            } else {
-                                Text(isAddMode ? "Login" : "Save")
-                                    .fontWeight(.semibold)
+                                    .controlSize(.regular)
+                                    .tint(.white)
+                                    .transition(.blurReplace)
                             }
-                            Spacer()
+                            Text(buttonTitle)
+                                .fontWeight(.semibold)
+                                .contentTransition(.opacity)
                         }
+                        .frame(maxWidth: .infinity)
+                        .animation(reduceMotion ? nil : .smooth(duration: 0.3), value: isLoading)
                     }
                     .buttonStyle(.borderedProminent)
+                    .controlSize(.large)
                     .disabled(
-                        isLoading || serverURL.isEmpty
+                        serverURL.isEmpty
                             || (authMode == .credentials
                                 && (username.isEmpty || (isAddMode && password.isEmpty)
                                     || (needsOTP && otpCode.isEmpty)))
@@ -242,6 +258,9 @@ struct InstanceFormView: View {
 
     // swiftlint:disable:next function_body_length cyclomatic_complexity
     private func handleSave() {
+        // The button keeps its prominent look while loading; guard re-entry here.
+        guard !isLoading else { return }
+
         if !name.isEmpty {
             let conflict = instances.first { inst in
                 let instId = inst.serverURL + inst.username