diff --git a/app/pages/accept-invite.vue b/app/pages/accept-invite.vue
index e5e0f04..ba6b655 100644
--- a/app/pages/accept-invite.vue
+++ b/app/pages/accept-invite.vue
@@ -32,7 +32,10 @@
               class="form-input"
               type="text"
               required
+              @blur="validateName"
+              @input="if (fieldErrors.name) fieldErrors.name = ''"
             >
+            <p v-if="fieldErrors.name" class="field-error">{{ fieldErrors.name }}</p>
           </div>
           <div class="form-group">
             <label class="form-label" for="accept-email">Email</label>
@@ -201,6 +204,13 @@ const form = reactive({
   agreedToGuidelines: false,
 });
 
+// Inline blur validation (UI feedback only — does not block submission)
+const fieldErrors = reactive({ name: "" });
+
+const validateName = () => {
+  fieldErrors.name = form.name.trim() ? "" : "Please enter your name.";
+};
+
 const isFormValid = computed(() => {
   return (
     form.name &&
@@ -447,6 +457,12 @@ textarea.form-input {
   line-height: 1.4;
 }
 
+.field-error {
+  font-size: 11px;
+  color: var(--ember);
+  margin-top: 4px;
+}
+
 /* ---- CIRCLE RADIOS ---- */
 .circle-radios {
   display: grid;
diff --git a/app/pages/join.vue b/app/pages/join.vue
index eb33733..6a1df14 100644
--- a/app/pages/join.vue
+++ b/app/pages/join.vue
@@ -128,7 +128,10 @@
                   class="form-input"
                   type="text"
                   required
+                  @blur="validateName"
+                  @input="if (fieldErrors.name) fieldErrors.name = ''"
                 >
+                <p v-if="fieldErrors.name" class="field-error">{{ fieldErrors.name }}</p>
               </div>
               <div class="form-group">
                 <label class="form-label" for="join-email">Email</label>
@@ -139,7 +142,10 @@
                   type="email"
                   placeholder="you@example.com"
                   required
+                  @blur="validateEmail"
+                  @input="if (fieldErrors.email) fieldErrors.email = ''"
                 >
+                <p v-if="fieldErrors.email" class="field-error">{{ fieldErrors.email }}</p>
               </div>
               <div class="form-group">
                 <label class="form-label">Circle</label>
@@ -346,6 +352,23 @@ const errorMessage = ref("");
 const successMessage = ref("");
 const cadence = ref("monthly"); // 'monthly' | 'annual'
 
+// Inline blur validation (UI feedback only — does not block submission)
+const fieldErrors = reactive({ name: "", email: "" });
+
+const validateName = () => {
+  fieldErrors.name = form.name.trim() ? "" : "Please enter your name.";
+};
+
+const validateEmail = () => {
+  const value = form.email.trim();
+  if (!value) {
+    fieldErrors.email = "";
+    return;
+  }
+  const ok = /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(value);
+  fieldErrors.email = ok ? "" : "Please enter a valid email address.";
+};
+
 // Flow overlay state — drives the post-submit full-viewport UI.
 // 'idle' = overlay hidden; user is editing the form.
 // 'creating-customer' | 'opening-payment' | 'processing-payment'
@@ -762,6 +785,11 @@ onUnmounted(() => {
 .form-input::placeholder {
   color: var(--text-faint);
 }
+.field-error {
+  font-size: 11px;
+  color: var(--ember);
+  margin-top: 4px;
+}
 
 /* ---- CIRCLE RADIOS ---- */
 .circle-radios {
diff --git a/app/pages/member/account.vue b/app/pages/member/account.vue
index 370f622..048fed9 100644
--- a/app/pages/member/account.vue
+++ b/app/pages/member/account.vue
@@ -173,9 +173,12 @@
                     type="email"
                     placeholder="you@example.com"
                     autofocus
+                    @blur="validateNewEmail"
+                    @input="if (fieldErrors.email) fieldErrors.email = ''"
                     @keydown.enter="handleUpdateEmail"
                     @keydown.escape="cancelEmailEdit"
                   >
+                  <p v-if="fieldErrors.email" class="field-error">{{ fieldErrors.email }}</p>
                 </div>
                 <div class="email-edit-actions">
                   <button
@@ -317,6 +320,19 @@ const showEmailEdit = ref(false);
 const newEmail = ref("");
 const isUpdatingEmail = ref(false);
 
+// Inline blur validation (UI feedback only — does not block submission)
+const fieldErrors = reactive({ email: "" });
+
+const validateNewEmail = () => {
+  const value = newEmail.value.trim();
+  if (!value) {
+    fieldErrors.email = "";
+    return;
+  }
+  const ok = /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(value);
+  fieldErrors.email = ok ? "" : "Please enter a valid email address.";
+};
+
 // Payment history state
 const paymentHistory = ref([]);
 const paymentHistoryLoading = ref(false);
@@ -516,6 +532,7 @@ const handleUpdateCircle = async () => {
 const cancelEmailEdit = () => {
   showEmailEdit.value = false;
   newEmail.value = "";
+  fieldErrors.email = "";
 };
 
 const handleUpdateEmail = async () => {
@@ -823,6 +840,11 @@ const confirmCancelMembership = async () => {
 .email-edit .field input:focus {
   border-color: var(--candle);
 }
+.email-edit .field .field-error {
+  font-size: 11px;
+  color: var(--ember);
+  margin-top: 4px;
+}
 .email-edit-actions {
   display: flex;
   gap: 8px;