diff --git a/src/routes/collections.$collectionId.tsx b/src/routes/collections.$collectionId.tsx
index 3fd691a..40c6ca8 100644
--- a/src/routes/collections.$collectionId.tsx
+++ b/src/routes/collections.$collectionId.tsx
@@ -298,168 +298,204 @@ function CollectionDetailRoute() {
           <ArrowLeft className="h-4 w-4 mr-1" /> All collections
         </Button>
 
-        {/* Workflow header */}
-        <Card className="border-border/60 mb-4">
-          <CardContent className="p-4 flex flex-wrap items-center justify-between gap-4">
-            <div>
-              <div className="text-xs uppercase tracking-wider text-muted-foreground mb-1">
-                Workflow stage
-              </div>
-              <div className="flex items-center gap-2 flex-wrap">
-                {stages.map((s, i) => {
-                  const isCurrent = s.key === collection.current_stage;
-                  const isPast = i < currentStageIdx;
-                  return (
-                    <div key={s.key} className="flex items-center gap-2">
-                      <Badge
-                        variant={isCurrent ? "default" : "outline"}
-                        className={
-                          isCurrent
-                            ? ""
-                            : isPast
-                              ? "opacity-60 line-through"
-                              : "opacity-50"
-                        }
-                      >
-                        {s.label}
-                      </Badge>
-                      {i < stages.length - 1 && (
-                        <ArrowRight className="h-3 w-3 text-muted-foreground" />
-                      )}
-                    </div>
-                  );
-                })}
-              </div>
-            </div>
-            <Button
-              onClick={escalate}
-              disabled={escalating || isLastStage || !nextStage}
-              size="lg"
-            >
-              {escalating ? (
-                <Loader2 className="h-4 w-4 mr-2 animate-spin" />
-              ) : (
-                <ArrowRight className="h-4 w-4 mr-2" />
-              )}
-              {isLastStage
-                ? "Final stage"
-                : `Escalate → ${nextStage?.label ?? ""}`}
-            </Button>
-          </CardContent>
-        </Card>
-
-        {/* Tasks */}
-        <Card className="border-border/60 mb-6">
-          <CardContent className="p-4">
-            <div className="flex items-center justify-between mb-3">
-              <h3 className="font-serif text-lg flex items-center gap-2">
-                <ListChecks className="h-4 w-4 text-muted-foreground" />
-                Tasks
-                {openTasks.length > 0 && (
-                  <Badge variant="secondary" className="ml-1">
-                    {openTasks.length} open
-                  </Badge>
-                )}
-              </h3>
-              <Button size="sm" variant="outline" onClick={() => setAddTaskOpen(true)}>
-                <Plus className="h-3.5 w-3.5 mr-1" /> Add task
-              </Button>
-            </div>
-            {tasks.length === 0 ? (
-              <p className="text-sm text-muted-foreground italic py-4">
-                No tasks yet. Escalate to populate the next stage's checklist, or
-                add one manually.
-              </p>
-            ) : (
-              <div className="space-y-1">
-                {[...openTasks, ...doneTasks].map((t) => {
-                  const stageLabel =
-                    stages.find((s) => s.key === t.stage_key)?.label;
-                  const overdue =
-                    !t.done &&
-                    t.due_date &&
-                    new Date(t.due_date) < new Date(new Date().toDateString());
-                  return (
-                    <div
-                      key={t.id}
-                      className={`flex items-center gap-3 px-2 py-2 rounded-md hover:bg-muted/40 ${
-                        t.done ? "opacity-60" : ""
-                      }`}
-                    >
-                      <button
-                        onClick={() => toggleDone(t)}
-                        className="shrink-0"
-                        aria-label={t.done ? "Mark not done" : "Mark done"}
-                      >
-                        {t.done ? (
-                          <CheckCircle2 className="h-5 w-5 text-emerald-600" />
-                        ) : (
-                          <Circle className="h-5 w-5 text-muted-foreground" />
-                        )}
-                      </button>
-                      <div className="flex-1 min-w-0">
-                        <div className={`text-sm ${t.done ? "line-through" : ""}`}>
-                          {t.title}
-                        </div>
-                        {stageLabel && (
-                          <div className="text-[10px] uppercase tracking-wider text-muted-foreground">
-                            {stageLabel}
-                          </div>
-                        )}
-                      </div>
-                      <Input
-                        type="date"
-                        className={`h-8 w-[150px] text-xs ${
-                          overdue ? "border-destructive text-destructive" : ""
-                        }`}
-                        value={t.due_date ?? ""}
-                        onChange={(e) => updateDueDate(t.id, e.target.value)}
-                      />
-                      <Select
-                        value={t.assignee_id ?? "unassigned"}
-                        onValueChange={(v) =>
-                          updateAssignee(t.id, v === "unassigned" ? null : v)
-                        }
-                      >
-                        <SelectTrigger className="h-8 w-[180px] text-xs">
-                          <SelectValue placeholder="Unassigned" />
-                        </SelectTrigger>
-                        <SelectContent>
-                          <SelectItem value="unassigned">Unassigned</SelectItem>
-                          {profiles.map((p) => (
-                            <SelectItem key={p.id} value={p.id}>
-                              {p.full_name || p.email}
-                            </SelectItem>
-                          ))}
-                        </SelectContent>
-                      </Select>
-                      <Button
-                        variant="ghost"
-                        size="icon"
-                        className="h-8 w-8"
-                        onClick={() => deleteTask(t.id)}
-                      >
-                        <Trash2 className="h-3.5 w-3.5 text-destructive" />
-                      </Button>
-                    </div>
-                  );
-                })}
-              </div>
+        {/* Tabs: Workflow (collections-specific) + same case tabs */}
+        <Tabs defaultValue="workflow">
+          <TabsList className="mb-4 flex-wrap h-auto">
+            <TabsTrigger value="workflow"><Workflow className="h-3.5 w-3.5 mr-1.5" />Workflow</TabsTrigger>
+            {collection.case && (
+              <>
+                <TabsTrigger value="litigation"><Scale className="h-3.5 w-3.5 mr-1.5" />Litigation</TabsTrigger>
+                <TabsTrigger value="status"><Activity className="h-3.5 w-3.5 mr-1.5" />Status log</TabsTrigger>
+                <TabsTrigger value="documents"><FileText className="h-3.5 w-3.5 mr-1.5" />Documents</TabsTrigger>
+                <TabsTrigger value="contacts"><Contact className="h-3.5 w-3.5 mr-1.5" />Contacts</TabsTrigger>
+                <TabsTrigger value="time"><Clock className="h-3.5 w-3.5 mr-1.5" />Time</TabsTrigger>
+                <TabsTrigger value="expenses"><DollarSign className="h-3.5 w-3.5 mr-1.5" />Expenses</TabsTrigger>
+                <TabsTrigger value="invoices"><Receipt className="h-3.5 w-3.5 mr-1.5" />Invoices</TabsTrigger>
+                <TabsTrigger value="calls"><Phone className="h-3.5 w-3.5 mr-1.5" />Calls</TabsTrigger>
+                <TabsTrigger value="custom"><Tag className="h-3.5 w-3.5 mr-1.5" />Custom fields</TabsTrigger>
+              </>
             )}
-          </CardContent>
-        </Card>
+          </TabsList>
 
-        {/* Payment plans */}
-        <PaymentPlansPanel collectionId={collection.id} />
+          <TabsContent value="workflow">
+            {/* Workflow header */}
+            <Card className="border-border/60 mb-4">
+              <CardContent className="p-4 flex flex-wrap items-center justify-between gap-4">
+                <div>
+                  <div className="text-xs uppercase tracking-wider text-muted-foreground mb-1">
+                    Workflow stage
+                  </div>
+                  <div className="flex items-center gap-2 flex-wrap">
+                    {stages.map((s, i) => {
+                      const isCurrent = s.key === collection.current_stage;
+                      const isPast = i < currentStageIdx;
+                      return (
+                        <div key={s.key} className="flex items-center gap-2">
+                          <Badge
+                            variant={isCurrent ? "default" : "outline"}
+                            className={
+                              isCurrent
+                                ? ""
+                                : isPast
+                                  ? "opacity-60 line-through"
+                                  : "opacity-50"
+                            }
+                          >
+                            {s.label}
+                          </Badge>
+                          {i < stages.length - 1 && (
+                            <ArrowRight className="h-3 w-3 text-muted-foreground" />
+                          )}
+                        </div>
+                      );
+                    })}
+                  </div>
+                </div>
+                <Button
+                  onClick={escalate}
+                  disabled={escalating || isLastStage || !nextStage}
+                  size="lg"
+                >
+                  {escalating ? (
+                    <Loader2 className="h-4 w-4 mr-2 animate-spin" />
+                  ) : (
+                    <ArrowRight className="h-4 w-4 mr-2" />
+                  )}
+                  {isLastStage
+                    ? "Final stage"
+                    : `Escalate → ${nextStage?.label ?? ""}`}
+                </Button>
+              </CardContent>
+            </Card>
 
-        {/* Ledger */}
-        <CollectionDetail
-          collection={collection}
-          annualRate={annualRate}
-          currentBalance={balanceFromOpening /* recalculated by detail */}
-          onBack={() => navigate({ to: "/collections" })}
-          onChange={() => setReload((r) => r + 1)}
-        />
+            {/* Tasks */}
+            <Card className="border-border/60 mb-6">
+              <CardContent className="p-4">
+                <div className="flex items-center justify-between mb-3">
+                  <h3 className="font-serif text-lg flex items-center gap-2">
+                    <ListChecks className="h-4 w-4 text-muted-foreground" />
+                    Tasks
+                    {openTasks.length > 0 && (
+                      <Badge variant="secondary" className="ml-1">
+                        {openTasks.length} open
+                      </Badge>
+                    )}
+                  </h3>
+                  <Button size="sm" variant="outline" onClick={() => setAddTaskOpen(true)}>
+                    <Plus className="h-3.5 w-3.5 mr-1" /> Add task
+                  </Button>
+                </div>
+                {tasks.length === 0 ? (
+                  <p className="text-sm text-muted-foreground italic py-4">
+                    No tasks yet. Escalate to populate the next stage's checklist, or
+                    add one manually.
+                  </p>
+                ) : (
+                  <div className="space-y-1">
+                    {[...openTasks, ...doneTasks].map((t) => {
+                      const stageLabel =
+                        stages.find((s) => s.key === t.stage_key)?.label;
+                      const overdue =
+                        !t.done &&
+                        t.due_date &&
+                        new Date(t.due_date) < new Date(new Date().toDateString());
+                      return (
+                        <div
+                          key={t.id}
+                          className={`flex items-center gap-3 px-2 py-2 rounded-md hover:bg-muted/40 ${
+                            t.done ? "opacity-60" : ""
+                          }`}
+                        >
+                          <button
+                            onClick={() => toggleDone(t)}
+                            className="shrink-0"
+                            aria-label={t.done ? "Mark not done" : "Mark done"}
+                          >
+                            {t.done ? (
+                              <CheckCircle2 className="h-5 w-5 text-emerald-600" />
+                            ) : (
+                              <Circle className="h-5 w-5 text-muted-foreground" />
+                            )}
+                          </button>
+                          <div className="flex-1 min-w-0">
+                            <div className={`text-sm ${t.done ? "line-through" : ""}`}>
+                              {t.title}
+                            </div>
+                            {stageLabel && (
+                              <div className="text-[10px] uppercase tracking-wider text-muted-foreground">
+                                {stageLabel}
+                              </div>
+                            )}
+                          </div>
+                          <Input
+                            type="date"
+                            className={`h-8 w-[150px] text-xs ${
+                              overdue ? "border-destructive text-destructive" : ""
+                            }`}
+                            value={t.due_date ?? ""}
+                            onChange={(e) => updateDueDate(t.id, e.target.value)}
+                          />
+                          <Select
+                            value={t.assignee_id ?? "unassigned"}
+                            onValueChange={(v) =>
+                              updateAssignee(t.id, v === "unassigned" ? null : v)
+                            }
+                          >
+                            <SelectTrigger className="h-8 w-[180px] text-xs">
+                              <SelectValue placeholder="Unassigned" />
+                            </SelectTrigger>
+                            <SelectContent>
+                              <SelectItem value="unassigned">Unassigned</SelectItem>
+                              {profiles.map((p) => (
+                                <SelectItem key={p.id} value={p.id}>
+                                  {p.full_name || p.email}
+                                </SelectItem>
+                              ))}
+                            </SelectContent>
+                          </Select>
+                          <Button
+                            variant="ghost"
+                            size="icon"
+                            className="h-8 w-8"
+                            onClick={() => deleteTask(t.id)}
+                          >
+                            <Trash2 className="h-3.5 w-3.5 text-destructive" />
+                          </Button>
+                        </div>
+                      );
+                    })}
+                  </div>
+                )}
+              </CardContent>
+            </Card>
+
+            {/* Payment plans */}
+            <PaymentPlansPanel collectionId={collection.id} />
+
+            {/* Ledger */}
+            <CollectionDetail
+              collection={collection}
+              annualRate={annualRate}
+              currentBalance={balanceFromOpening /* recalculated by detail */}
+              onBack={() => navigate({ to: "/collections" })}
+              onChange={() => setReload((r) => r + 1)}
+            />
+          </TabsContent>
+
+          {collection.case && (
+            <>
+              <TabsContent value="litigation"><CaseLitigationTab caseRecord={collection.case} canManage={true} onSaved={() => setReload((r) => r + 1)} /></TabsContent>
+              <TabsContent value="status"><CaseStatusTab caseId={collection.case.id} caseLabel={`${collection.case.case_number} — ${collection.case.title}`} /></TabsContent>
+              <TabsContent value="documents"><CaseDocumentsTab caseId={collection.case.id} /></TabsContent>
+              <TabsContent value="contacts"><ContactsLinkTab parentId={collection.case.id} parentTable="case_contacts" /></TabsContent>
+              <TabsContent value="time"><CaseTimeTab caseRecord={collection.case} onInvoice={() => {}} /></TabsContent>
+              <TabsContent value="expenses"><CaseExpensesTab caseId={collection.case.id} /></TabsContent>
+              <TabsContent value="invoices"><CaseInvoicesTab caseRecord={collection.case} /></TabsContent>
+              <TabsContent value="calls"><CaseCallLogsTab caseId={collection.case.id} /></TabsContent>
+              <TabsContent value="custom"><CaseCustomFieldsTab caseId={collection.case.id} /></TabsContent>
+            </>
+          )}
+        </Tabs>
 
         <AddTaskDialog
           open={addTaskOpen}