diff --git a/src/internal/mgr/group.go b/src/internal/mgr/group.go
index d5c36cf..e0894b9 100644
--- a/src/internal/mgr/group.go
+++ b/src/internal/mgr/group.go
@@ -21,12 +21,12 @@ func UserGroupLabel(name string) string {
 }
 
 // MachineSpecs renders a compact quota tag for the container switcher:
-// "<cpu>c<mem>g<disk>g", e.g. "4c8g40g". CPU reuses FormatCPU (tenths of a
+// "<cpu>c <mem>g <disk>g", e.g. "4c 8g 40g". CPU reuses FormatCPU (tenths of a
 // core, so 0.5 stays fractional); memory is MiB rendered as GiB with a trimmed
 // decimal (1024 -> "1", 512 -> "0.5"); disk is already GiB.
 func MachineSpecs(cpuTenths, memMB, diskGB int) string {
 	mem := strconv.FormatFloat(float64(memMB)/1024, 'f', -1, 64)
-	return FormatCPU(cpuTenths) + "c" + mem + "g" + strconv.Itoa(diskGB) + "g"
+	return FormatCPU(cpuTenths) + "c " + mem + "g " + strconv.Itoa(diskGB) + "g"
 }
 
 type UserGroup struct {
diff --git a/src/internal/mgr/group_test.go b/src/internal/mgr/group_test.go
index e187937..a3c3c9d 100644
--- a/src/internal/mgr/group_test.go
+++ b/src/internal/mgr/group_test.go
@@ -47,10 +47,10 @@ func TestMachineSpecs(t *testing.T) {
 		cpu, mem, disk int
 		want           string
 	}{
-		{10, 1024, 10, "1c1g10g"},
-		{40, 8192, 40, "4c8g40g"},
-		{5, 512, 10, "0.5c0.5g10g"},
-		{20, 1536, 20, "2c1.5g20g"},
+		{10, 1024, 10, "1c 1g 10g"},
+		{40, 8192, 40, "4c 8g 40g"},
+		{5, 512, 10, "0.5c 0.5g 10g"},
+		{20, 1536, 20, "2c 1.5g 20g"},
 	} {
 		if got := MachineSpecs(test.cpu, test.mem, test.disk); got != test.want {
 			t.Errorf("MachineSpecs(%d, %d, %d) = %q, want %q", test.cpu, test.mem, test.disk, got, test.want)
diff --git a/src/internal/panel/panel.go b/src/internal/panel/panel.go
index 7798946..780079a 100644
--- a/src/internal/panel/panel.go
+++ b/src/internal/panel/panel.go
@@ -133,7 +133,7 @@ type sshKeyRow struct {
 type groupMemberRow struct {
 	Name  string // account name, used as the <option> value
 	Label string // "A" for the base account, else the numeric suffix
-	Specs string // compact quota tag, e.g. "4c8g40g"
+	Specs string // compact quota tag, e.g. "4c 8g 40g"
 }
 
 type pageData struct {
diff --git a/src/internal/panel/panel_test.go b/src/internal/panel/panel_test.go
index 6d79af7..f71d3d3 100644
--- a/src/internal/panel/panel_test.go
+++ b/src/internal/panel/panel_test.go
@@ -1210,7 +1210,7 @@ func TestOverviewGroupSwitcherLabels(t *testing.T) {
 	}
 	cookie := loginAndCookie(t, h, prefix, "alice", "pw")
 	body := doReq(t, h, http.MethodGet, prefix, nil, cookie).Body.String()
-	base, child := "A-1c1g10g", "1-4c8g40g"
+	base, child := "A - 1c 1g 10g", "1 - 4c 8g 40g"
 	for _, want := range []string{">" + base + "</option>", ">" + child + "</option>"} {
 		if !strings.Contains(body, want) {
 			t.Errorf("overview switcher missing %q", want)
diff --git a/src/internal/panel/templates/overview.html b/src/internal/panel/templates/overview.html
index 7bd8e0f..8732403 100644
--- a/src/internal/panel/templates/overview.html
+++ b/src/internal/panel/templates/overview.html
@@ -234,7 +234,7 @@ footer a{color:var(--muted);text-decoration:underline}
 </div>
 {{if .Err}}<div class="err">{{.Err}}</div>{{end}}
 {{if gt .GroupCount 1}}
-<div class="groupbanner"><span>⚠ {{if eq .Lang "zh"}}您的用户组内有多台机器，当前机器序号为{{else}}Your user group has multiple containers. Current container number:{{end}} <strong class="container-index">{{.GroupIndex}}</strong>。{{if eq .Lang "zh"}}请确认您操作的机器无误。{{else}}Confirm this is the intended container before operating.{{end}}{{if gt (len .GroupUsers) 1}}<form action="{{.Prefix}}/switch-user" method="post" class="inline group-switch"><select name="name" onchange="this.form.submit()" aria-label="{{if eq .Lang "zh"}}切换机器{{else}}Switch container{{end}}">{{range .GroupUsers}}<option value="{{.Name}}"{{if eq .Name $.User.Name}} selected{{end}}>{{.Label}}-{{.Specs}}</option>{{end}}</select></form>{{end}}</div>
+<div class="groupbanner"><span>⚠ {{if eq .Lang "zh"}}您的用户组内有多台机器，当前机器序号为{{else}}Your user group has multiple containers. Current container number:{{end}} <strong class="container-index">{{.GroupIndex}}</strong>。{{if eq .Lang "zh"}}请确认您操作的机器无误。{{else}}Confirm this is the intended container before operating.{{end}}{{if gt (len .GroupUsers) 1}}<form action="{{.Prefix}}/switch-user" method="post" class="inline group-switch"><select name="name" onchange="this.form.submit()" aria-label="{{if eq .Lang "zh"}}切换机器{{else}}Switch container{{end}}">{{range .GroupUsers}}<option value="{{.Name}}"{{if eq .Name $.User.Name}} selected{{end}}>{{.Label}} - {{.Specs}}</option>{{end}}</select></form>{{end}}</div>
 {{end}}
 {{if .Impersonated}}
 <div class="impbanner">