feat(forms): add public form access and response submission for participants

- Implemented public access to forms with `getPublic` procedure.
- Added `submitPublic` procedure for participants to submit responses.
- Created a new participant form page to handle form display and submission.
- Enhanced form validation and error handling for required fields.
- Introduced CSV export functionality for form responses.
- Updated form listing and template creation procedures.
- Added README for homepage screenshots.

public/images/screenshots/README.md

@@ -0,0 +1,28 @@
+# Homepage Screenshots
+
+Add your app screenshots here. The homepage will display them automatically.
+
+## Required Screenshots
+
+1. **experiment-designer.png** - Visual experiment designer showing block-based workflow
+2. **wizard-interface.png** - Wizard execution interface with trial controls
+3. **dashboard.png** - Study dashboard showing experiments and trials
+
+## Recommended Size
+
+- Width: 1200px
+- Format: PNG or WebP
+- Quality: High (screenshot at 2x for retina displays)
+
+## Preview in Browser
+
+After adding screenshots, uncomment the `<Image>` component in `src/app/page.tsx`:
+
+```tsx
+<Image
+  src={screenshot.src}
+  alt={screenshot.alt}
+  fill
+  className="object-cover transition-transform group-hover:scale-105"
+/>
+```

src/app/(dashboard)/studies/[id]/forms/[formId]/page.tsx

@@ -19,6 +19,11 @@ import {
   Edit2,
   Users,
   CheckCircle,
+  Printer,
+  Download,
+  Pencil,
+  X,
+  FileDown,
 } from "lucide-react";
 import { useBreadcrumbsEffect } from "~/components/ui/breadcrumb-provider";
 import { Button } from "~/components/ui/button";
@@ -81,8 +86,16 @@ export default function FormViewPage({ params }: FormViewPageProps) {
   const { data: session } = useSession();
   const router = useRouter();
   const utils = api.useUtils();
-  const [resolvedParams, setResolvedParams] = useState<{ id: string; formId: string } | null>(null);
+  const [resolvedParams, setResolvedParams] = useState<{
+    id: string;
+    formId: string;
+  } | null>(null);
   const [isEditing, setIsEditing] = useState(false);
+  const [isEnteringData, setIsEnteringData] = useState(false);
+  const [selectedParticipantId, setSelectedParticipantId] =
+    useState<string>("");
+  const [formResponses, setFormResponses] = useState<Record<string, any>>({});
+  const [isGeneratingPdf, setIsGeneratingPdf] = useState(false);
 
   const [title, setTitle] = useState("");
   const [description, setDescription] = useState("");
@@ -96,6 +109,11 @@ export default function FormViewPage({ params }: FormViewPageProps) {
     void resolveParams();
   }, [params]);
 
+  const { data: participants } = api.participants.list.useQuery(
+    { studyId: resolvedParams?.id ?? "" },
+    { enabled: !!resolvedParams?.id && isEnteringData },
+  );
+
   const { data: study } = api.studies.get.useQuery(
     { id: resolvedParams?.id ?? "" },
     { enabled: !!resolvedParams?.id },
@@ -125,6 +143,143 @@ export default function FormViewPage({ params }: FormViewPageProps) {
     },
   });
 
+  const submitResponse = api.forms.submitResponse.useMutation({
+    onSuccess: () => {
+      toast.success("Response submitted successfully!");
+      setIsEnteringData(false);
+      setSelectedParticipantId("");
+      setFormResponses({});
+      void utils.forms.getResponses.invalidate({
+        formId: resolvedParams?.formId,
+      });
+    },
+    onError: (error) => {
+      toast.error("Failed to submit response", { description: error.message });
+    },
+  });
+
+  const exportCsv = api.forms.exportCsv.useQuery(
+    { formId: resolvedParams?.formId ?? "" },
+    { enabled: !!resolvedParams?.formId && canManage },
+  );
+
+  const handleExportCsv = () => {
+    if (exportCsv.data) {
+      const blob = new Blob([exportCsv.data.csv], { type: "text/csv" });
+      const url = window.URL.createObjectURL(blob);
+      const a = document.createElement("a");
+      a.href = url;
+      a.download = exportCsv.data.filename;
+      document.body.appendChild(a);
+      a.click();
+      window.URL.revokeObjectURL(url);
+      document.body.removeChild(a);
+      toast.success("CSV exported successfully!");
+    }
+  };
+
+  const generatePdf = async () => {
+    if (!study || !form) return;
+    setIsGeneratingPdf(true);
+    const { downloadPdfFromHtml } = await import("~/lib/pdf-generator");
+
+    const fieldsHtml = fields
+      .map((field, index) => {
+        const requiredMark = field.required
+          ? '<span style="color: red">*</span>'
+          : "";
+        let inputField = "";
+
+        switch (field.type) {
+          case "text":
+            inputField =
+              '<input type="text" style="width: 100%; padding: 8px; border: 1px solid #ccc; margin-top: 4px;" placeholder="________________________" />';
+            break;
+          case "textarea":
+            inputField =
+              '<textarea style="width: 100%; height: 80px; padding: 8px; border: 1px solid #ccc; margin-top: 4px;" placeholder=""></textarea>';
+            break;
+          case "multiple_choice":
+            inputField = `<div style="margin-top: 4px;">${field.options
+              ?.map((opt) => `<div><input type="checkbox" /> ${opt}</div>`)
+              .join("")}</div>`;
+            break;
+          case "checkbox":
+            inputField =
+              '<div style="margin-top: 4px;"><input type="checkbox" /> Yes</div>';
+            break;
+          case "yes_no":
+            inputField =
+              '<div style="margin-top: 4px;"><input type="radio" name="yn" /> Yes &nbsp; <input type="radio" name="yn" /> No</div>';
+            break;
+          case "rating":
+            const scale = field.settings?.scale || 5;
+            inputField = `<div style="margin-top: 4px;">${Array.from(
+              { length: scale },
+              (_, i) => `<input type="radio" name="rating" /> ${i + 1} `,
+            ).join("")}</div>`;
+            break;
+          case "date":
+            inputField =
+              '<input type="text" style="padding: 8px; border: 1px solid #ccc; margin-top: 4px;" placeholder="MM/DD/YYYY" />';
+            break;
+          case "signature":
+            inputField =
+              '<div style="height: 60px; border: 1px solid #ccc; margin-top: 4px;"></div><div style="font-size: 12px; color: #666; margin-top: 4px;">Signature: _________________________ Date: ____________</div>';
+            break;
+        }
+
+        return `
+        <div style="margin-bottom: 16px;">
+          <p style="margin: 0; font-weight: 500;">${index + 1}. ${field.label} ${requiredMark}</p>
+          ${inputField}
+        </div>
+      `;
+      })
+      .join(
+        "<hr style='border: none; border-top: 1px solid #eee; margin: 16px 0;' />",
+      );
+
+    const html = `
+      <div style="max-width: 800px; margin: 0 auto; padding: 20px;">
+        <h1 style="margin-bottom: 8px;">${title}</h1>
+        ${description ? `<p style="color: #666; margin-bottom: 24px;">${description}</p>` : ""}
+        <p style="color: #666; font-size: 12px; margin-bottom: 24px;">
+          <strong>Study:</strong> ${study?.name || ""} &nbsp;|&nbsp;
+          <strong>Form Type:</strong> ${form?.type} &nbsp;|&nbsp;
+          <strong>Version:</strong> ${form?.version}
+        </p>
+        <hr style="border: none; border-top: 2px solid #333; margin-bottom: 24px;" />
+        ${fieldsHtml}
+        <hr style="border: none; border-top: 2px solid #333; margin-top: 24px;" />
+        <p style="font-size: 10px; color: #999; margin-top: 24px;">
+          Generated by HRIStudio | ${new Date().toLocaleDateString()}
+        </p>
+      </div>
+    `;
+
+    await downloadPdfFromHtml(html, {
+      filename: `${title.replace(/\s+/g, "_")}_form.pdf`,
+    });
+    setIsGeneratingPdf(false);
+  };
+
+  const handleDataEntry = () => {
+    if (!selectedParticipantId || !form) {
+      toast.error("Please select a participant");
+      return;
+    }
+    const answers: Record<string, any> = {};
+    fields.forEach((field) => {
+      answers[field.id] = formResponses[field.id] ?? "";
+    });
+    submitResponse.mutate({
+      formId: form.id,
+      participantId: selectedParticipantId,
+      responses: answers,
+    });
+  };
+
   useEffect(() => {
     if (form) {
       setTitle(form.title);
@@ -147,26 +302,28 @@ export default function FormViewPage({ params }: FormViewPageProps) {
 
   if (isLoading || !form) return <div>Loading...</div>;
 
-  const TypeIcon = formTypeIcons[form.type as keyof typeof formTypeIcons] || FileText;
+  const TypeIcon =
+    formTypeIcons[form.type as keyof typeof formTypeIcons] || FileText;
   const responses = responsesData?.responses ?? [];
 
   const addField = (type: string) => {
     const newField: Field = {
       id: crypto.randomUUID(),
       type,
-      label: `New ${fieldTypes.find(f => f.value === type)?.label || "Field"}`,
+      label: `New ${fieldTypes.find((f) => f.value === type)?.label || "Field"}`,
       required: false,
-      options: type === "multiple_choice" ? ["Option 1", "Option 2"] : undefined,
+      options:
+        type === "multiple_choice" ? ["Option 1", "Option 2"] : undefined,
     };
     setFields([...fields, newField]);
   };
 
   const removeField = (id: string) => {
-    setFields(fields.filter(f => f.id !== id));
+    setFields(fields.filter((f) => f.id !== id));
   };
 
   const updateField = (id: string, updates: Partial<Field>) => {
-    setFields(fields.map(f => f.id === id ? { ...f, ...updates } : f));
+    setFields(fields.map((f) => (f.id === id ? { ...f, ...updates } : f)));
   };
 
   const handleSave = () => {
@@ -191,10 +348,12 @@ export default function FormViewPage({ params }: FormViewPageProps) {
           </Button>
           <div>
             <div className="flex items-center gap-2">
-              <TypeIcon className="h-5 w-5 text-muted-foreground" />
+              <TypeIcon className="text-muted-foreground h-5 w-5" />
               <h1 className="text-2xl font-bold">{form.title}</h1>
               {form.active && (
-                <Badge variant="default" className="text-xs">Active</Badge>
+                <Badge variant="default" className="text-xs">
+                  Active
+                </Badge>
               )}
             </div>
             <p className="text-muted-foreground text-sm capitalize">
@@ -215,10 +374,20 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                 </Button>
               </>
             ) : (
-              <Button onClick={() => setIsEditing(true)}>
+              <>
-                <Edit2 className="mr-2 h-4 w-4" />
+                <Button
-                Edit Form
+                  variant="outline"
-              </Button>
+                  onClick={generatePdf}
+                  disabled={isGeneratingPdf}
+                >
+                  <Printer className="mr-2 h-4 w-4" />
+                  {isGeneratingPdf ? "Generating..." : "Print PDF"}
+                </Button>
+                <Button onClick={() => setIsEditing(true)}>
+                  <Edit2 className="mr-2 h-4 w-4" />
+                  Edit Form
+                </Button>
+              </>
             )}
           </div>
         )}
@@ -228,6 +397,9 @@ export default function FormViewPage({ params }: FormViewPageProps) {
         <TabsList>
           <TabsTrigger value="fields">Fields</TabsTrigger>
           <TabsTrigger value="preview">Preview</TabsTrigger>
+          {canManage && (
+            <TabsTrigger value="data-entry">Data Entry</TabsTrigger>
+          )}
           <TabsTrigger value="responses">
             Responses ({responses.length})
           </TabsTrigger>
@@ -254,7 +426,7 @@ export default function FormViewPage({ params }: FormViewPageProps) {
               </CardHeader>
               <CardContent>
                 {fields.length === 0 ? (
-                  <div className="flex flex-col items-center justify-center py-8 text-center text-muted-foreground">
+                  <div className="text-muted-foreground flex flex-col items-center justify-center py-8 text-center">
                     <FileText className="mb-2 h-8 w-8" />
                     <p>No fields added yet</p>
                   </div>
@@ -265,18 +437,26 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                         key={field.id}
                         className="flex items-start gap-3 rounded-lg border p-4"
                       >
-                        <div className="flex cursor-grab items-center text-muted-foreground">
+                        <div className="text-muted-foreground flex cursor-grab items-center">
                           <GripVertical className="h-5 w-5" />
                         </div>
                         <div className="flex-1 space-y-3">
                           <div className="flex items-center gap-3">
                             <Badge variant="outline" className="text-xs">
-                              {fieldTypes.find(f => f.value === field.type)?.icon}{" "}
+                              {
-                              {fieldTypes.find(f => f.value === field.type)?.label}
+                                fieldTypes.find((f) => f.value === field.type)
+                                  ?.icon
+                              }{" "}
+                              {
+                                fieldTypes.find((f) => f.value === field.type)
+                                  ?.label
+                              }
                             </Badge>
                             <Input
                               value={field.label}
-                              onChange={(e) => updateField(field.id, { label: e.target.value })}
+                              onChange={(e) =>
+                                updateField(field.id, { label: e.target.value })
+                              }
                               placeholder="Field label"
                               className="flex-1"
                             />
@@ -284,7 +464,11 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                               <input
                                 type="checkbox"
                                 checked={field.required}
-                                onChange={(e) => updateField(field.id, { required: e.target.checked })}
+                                onChange={(e) =>
+                                  updateField(field.id, {
+                                    required: e.target.checked,
+                                  })
+                                }
                                 className="rounded border-gray-300"
                               />
                               Required
@@ -294,13 +478,20 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                             <div className="space-y-2">
                               <Label className="text-xs">Options</Label>
                               {field.options?.map((opt, i) => (
-                                <div key={i} className="flex items-center gap-2">
+                                <div
+                                  key={i}
+                                  className="flex items-center gap-2"
+                                >
                                   <Input
                                     value={opt}
                                     onChange={(e) => {
-                                      const newOptions = [...(field.options || [])];
+                                      const newOptions = [
+                                        ...(field.options || []),
+                                      ];
                                       newOptions[i] = e.target.value;
-                                      updateField(field.id, { options: newOptions });
+                                      updateField(field.id, {
+                                        options: newOptions,
+                                      });
                                     }}
                                     placeholder={`Option ${i + 1}`}
                                     className="flex-1"
@@ -310,8 +501,12 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                                     variant="ghost"
                                     size="icon"
                                     onClick={() => {
-                                      const newOptions = field.options?.filter((_, idx) => idx !== i);
+                                      const newOptions = field.options?.filter(
-                                      updateField(field.id, { options: newOptions });
+                                        (_, idx) => idx !== i,
+                                      );
+                                      updateField(field.id, {
+                                        options: newOptions,
+                                      });
                                     }}
                                   >
                                     <Trash2 className="h-4 w-4" />
@@ -323,8 +518,13 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                                 variant="outline"
                                 size="sm"
                                 onClick={() => {
-                                  const newOptions = [...(field.options || []), `Option ${(field.options?.length || 0) + 1}`];
+                                  const newOptions = [
-                                  updateField(field.id, { options: newOptions });
+                                    ...(field.options || []),
+                                    `Option ${(field.options?.length || 0) + 1}`,
+                                  ];
+                                  updateField(field.id, {
+                                    options: newOptions,
+                                  });
                                 }}
                               >
                                 <Plus className="mr-1 h-4 w-4" />
@@ -339,7 +539,7 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                           size="icon"
                           onClick={() => removeField(field.id)}
                         >
-                          <Trash2 className="h-4 w-4 text-destructive" />
+                          <Trash2 className="text-destructive h-4 w-4" />
                         </Button>
                       </div>
                     ))}
@@ -358,16 +558,23 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                 ) : (
                   <div className="space-y-3">
                     {fields.map((field, index) => (
-                      <div key={field.id} className="flex items-center gap-3 rounded-lg border p-3">
+                      <div
-                        <span className="flex h-6 w-6 items-center justify-center rounded-full bg-muted text-xs">
+                        key={field.id}
+                        className="flex items-center gap-3 rounded-lg border p-3"
+                      >
+                        <span className="bg-muted flex h-6 w-6 items-center justify-center rounded-full text-xs">
                           {index + 1}
                         </span>
                         <div className="flex-1">
                           <p className="font-medium">{field.label}</p>
                           <p className="text-muted-foreground text-xs">
-                            {fieldTypes.find(f => f.value === field.type)?.label}
+                            {
+                              fieldTypes.find((f) => f.value === field.type)
+                                ?.label
+                            }
                             {field.required && " • Required"}
-                            {field.type === "multiple_choice" && ` • ${field.options?.length} options`}
+                            {field.type === "multiple_choice" &&
+                              ` • ${field.options?.length} options`}
                           </p>
                         </div>
                       </div>
@@ -387,7 +594,9 @@ export default function FormViewPage({ params }: FormViewPageProps) {
             <CardContent className="space-y-6">
               <div className="space-y-2">
                 <h2 className="text-xl font-semibold">{title}</h2>
-                {description && <p className="text-muted-foreground">{description}</p>}
+                {description && (
+                  <p className="text-muted-foreground">{description}</p>
+                )}
               </div>
               {fields.length === 0 ? (
                 <p className="text-muted-foreground">No fields to preview</p>
@@ -397,13 +606,18 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                     <div key={field.id} className="space-y-2">
                       <Label>
                         {index + 1}. {field.label}
-                        {field.required && <span className="text-destructive"> *</span>}
+                        {field.required && (
+                          <span className="text-destructive"> *</span>
+                        )}
                       </Label>
                       {field.type === "text" && (
                         <Input placeholder="Enter your response..." disabled />
                       )}
                       {field.type === "textarea" && (
-                        <Textarea placeholder="Enter your response..." disabled />
+                        <Textarea
+                          placeholder="Enter your response..."
+                          disabled
+                        />
                       )}
                       {field.type === "multiple_choice" && (
                         <div className="space-y-2">
@@ -431,18 +645,24 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                       )}
                       {field.type === "rating" && (
                         <div className="flex gap-2">
-                          {Array.from({ length: field.settings?.scale || 5 }, (_, i) => (
+                          {Array.from(
-                            <button key={i} type="button" className="h-8 w-8 rounded border disabled" disabled>
+                            { length: field.settings?.scale || 5 },
-                              {i + 1}
+                            (_, i) => (
-                            </button>
+                              <button
-                          ))}
+                                key={i}
+                                type="button"
+                                className="disabled h-8 w-8 rounded border"
+                                disabled
+                              >
+                                {i + 1}
+                              </button>
+                            ),
+                          )}
                         </div>
                       )}
-                      {field.type === "date" && (
+                      {field.type === "date" && <Input type="date" disabled />}
-                        <Input type="date" disabled />
-                      )}
                       {field.type === "signature" && (
-                        <div className="h-24 rounded border bg-muted/50 flex items-center justify-center text-muted-foreground">
+                        <div className="bg-muted/50 text-muted-foreground flex h-24 items-center justify-center rounded border">
                           Signature pad (disabled in preview)
                         </div>
                       )}
@@ -454,14 +674,263 @@ export default function FormViewPage({ params }: FormViewPageProps) {
           </Card>
         </TabsContent>
 
-        <TabsContent value="responses">
+        <TabsContent value="data-entry">
           <Card>
             <CardHeader>
+              <div className="flex items-center justify-between">
+                <CardTitle>Manual Data Entry</CardTitle>
+                <Button
+                  variant="outline"
+                  size="sm"
+                  onClick={() => {
+                    setIsEnteringData(!isEnteringData);
+                    setSelectedParticipantId("");
+                    setFormResponses({});
+                  }}
+                >
+                  {isEnteringData ? (
+                    <>
+                      <X className="mr-2 h-4 w-4" />
+                      Cancel
+                    </>
+                  ) : (
+                    <>
+                      <Pencil className="mr-2 h-4 w-4" />
+                      Enter Data
+                    </>
+                  )}
+                </Button>
+              </div>
+            </CardHeader>
+            <CardContent className="space-y-4">
+              {isEnteringData ? (
+                <>
+                  <div className="space-y-2">
+                    <Label>Select Participant</Label>
+                    <Select
+                      value={selectedParticipantId}
+                      onValueChange={setSelectedParticipantId}
+                    >
+                      <SelectTrigger>
+                        <SelectValue placeholder="Choose a participant..." />
+                      </SelectTrigger>
+                      <SelectContent>
+                        {participants?.participants?.map((p) => (
+                          <SelectItem key={p.id} value={p.id}>
+                            {p.name || p.participantCode || p.email || p.id}
+                          </SelectItem>
+                        ))}
+                      </SelectContent>
+                    </Select>
+                  </div>
+
+                  {selectedParticipantId && (
+                    <div className="space-y-6 border-t pt-4">
+                      <h3 className="font-semibold">Form Responses</h3>
+                      {fields.map((field, index) => (
+                        <div key={field.id} className="space-y-2">
+                          <Label>
+                            {index + 1}. {field.label}
+                            {field.required && (
+                              <span className="text-destructive"> *</span>
+                            )}
+                          </Label>
+                          {field.type === "text" && (
+                            <Input
+                              value={formResponses[field.id] || ""}
+                              onChange={(e) =>
+                                setFormResponses({
+                                  ...formResponses,
+                                  [field.id]: e.target.value,
+                                })
+                              }
+                              placeholder="Enter response..."
+                            />
+                          )}
+                          {field.type === "textarea" && (
+                            <Textarea
+                              value={formResponses[field.id] || ""}
+                              onChange={(e) =>
+                                setFormResponses({
+                                  ...formResponses,
+                                  [field.id]: e.target.value,
+                                })
+                              }
+                              placeholder="Enter response..."
+                            />
+                          )}
+                          {field.type === "multiple_choice" && (
+                            <Select
+                              value={formResponses[field.id] || ""}
+                              onValueChange={(val) =>
+                                setFormResponses({
+                                  ...formResponses,
+                                  [field.id]: val,
+                                })
+                              }
+                            >
+                              <SelectTrigger>
+                                <SelectValue placeholder="Select an option..." />
+                              </SelectTrigger>
+                              <SelectContent>
+                                {field.options?.map((opt, i) => (
+                                  <SelectItem key={i} value={opt}>
+                                    {opt}
+                                  </SelectItem>
+                                ))}
+                              </SelectContent>
+                            </Select>
+                          )}
+                          {field.type === "checkbox" && (
+                            <div className="flex items-center gap-2">
+                              <input
+                                type="checkbox"
+                                checked={formResponses[field.id] || false}
+                                onChange={(e) =>
+                                  setFormResponses({
+                                    ...formResponses,
+                                    [field.id]: e.target.checked,
+                                  })
+                                }
+                                className="h-4 w-4"
+                              />
+                              <span>Yes</span>
+                            </div>
+                          )}
+                          {field.type === "yes_no" && (
+                            <Select
+                              value={formResponses[field.id] || ""}
+                              onValueChange={(val) =>
+                                setFormResponses({
+                                  ...formResponses,
+                                  [field.id]: val,
+                                })
+                              }
+                            >
+                              <SelectTrigger>
+                                <SelectValue placeholder="Select..." />
+                              </SelectTrigger>
+                              <SelectContent>
+                                <SelectItem value="yes">Yes</SelectItem>
+                                <SelectItem value="no">No</SelectItem>
+                              </SelectContent>
+                            </Select>
+                          )}
+                          {field.type === "rating" && (
+                            <Select
+                              value={String(formResponses[field.id] || "")}
+                              onValueChange={(val) =>
+                                setFormResponses({
+                                  ...formResponses,
+                                  [field.id]: parseInt(val),
+                                })
+                              }
+                            >
+                              <SelectTrigger>
+                                <SelectValue placeholder="Select rating..." />
+                              </SelectTrigger>
+                              <SelectContent>
+                                {Array.from(
+                                  { length: field.settings?.scale || 5 },
+                                  (_, i) => (
+                                    <SelectItem key={i} value={String(i + 1)}>
+                                      {i + 1}
+                                    </SelectItem>
+                                  ),
+                                )}
+                              </SelectContent>
+                            </Select>
+                          )}
+                          {field.type === "date" && (
+                            <Input
+                              type="date"
+                              value={formResponses[field.id] || ""}
+                              onChange={(e) =>
+                                setFormResponses({
+                                  ...formResponses,
+                                  [field.id]: e.target.value,
+                                })
+                              }
+                            />
+                          )}
+                          {field.type === "signature" && (
+                            <div className="space-y-2">
+                              <Input
+                                value={formResponses[field.id] || ""}
+                                onChange={(e) =>
+                                  setFormResponses({
+                                    ...formResponses,
+                                    [field.id]: e.target.value,
+                                  })
+                                }
+                                placeholder="Type name as signature..."
+                              />
+                              <p className="text-muted-foreground text-xs">
+                                By entering your name above, you confirm that
+                                the information provided is accurate.
+                              </p>
+                            </div>
+                          )}
+                        </div>
+                      ))}
+
+                      <div className="flex justify-end gap-2 border-t pt-4">
+                        <Button
+                          variant="outline"
+                          onClick={() => {
+                            setIsEnteringData(false);
+                            setSelectedParticipantId("");
+                            setFormResponses({});
+                          }}
+                        >
+                          Cancel
+                        </Button>
+                        <Button
+                          onClick={handleDataEntry}
+                          disabled={submitResponse.isPending}
+                        >
+                          <Save className="mr-2 h-4 w-4" />
+                          {submitResponse.isPending
+                            ? "Saving..."
+                            : "Save Response"}
+                        </Button>
+                      </div>
+                    </div>
+                  )}
+                </>
+              ) : (
+                <div className="text-muted-foreground flex flex-col items-center justify-center py-8 text-center">
+                  <Pencil className="mb-2 h-8 w-8" />
+                  <p>Manual data entry</p>
+                  <p className="text-sm">
+                    Enter responses directly for participants who completed the
+                    form on paper
+                  </p>
+                </div>
+              )}
+            </CardContent>
+          </Card>
+        </TabsContent>
+
+        <TabsContent value="responses">
+          <Card>
+            <CardHeader className="flex flex-row items-center justify-between">
               <CardTitle>Form Responses</CardTitle>
+              {canManage && responses.length > 0 && (
+                <Button
+                  variant="outline"
+                  size="sm"
+                  onClick={handleExportCsv}
+                  disabled={exportCsv.isFetching}
+                >
+                  <FileDown className="mr-2 h-4 w-4" />
+                  {exportCsv.isFetching ? "Exporting..." : "Export CSV"}
+                </Button>
+              )}
             </CardHeader>
             <CardContent>
               {responses.length === 0 ? (
-                <div className="flex flex-col items-center justify-center py-8 text-center text-muted-foreground">
+                <div className="text-muted-foreground flex flex-col items-center justify-center py-8 text-center">
                   <Users className="mb-2 h-8 w-8" />
                   <p>No responses yet</p>
                 </div>
@@ -469,27 +938,35 @@ export default function FormViewPage({ params }: FormViewPageProps) {
                 <div className="space-y-4">
                   {responses.map((response) => (
                     <div key={response.id} className="rounded-lg border p-4">
-                      <div className="flex items-center justify-between mb-3">
+                      <div className="mb-3 flex items-center justify-between">
                         <div className="flex items-center gap-2">
-                          <Users className="h-4 w-4 text-muted-foreground" />
+                          <Users className="text-muted-foreground h-4 w-4" />
                           <span className="font-medium">
-                            {response.participant?.name || response.participant?.participantCode || "Unknown"}
+                            {response.participant?.name ||
+                              response.participant?.participantCode ||
+                              "Unknown"}
                           </span>
                         </div>
-                        <Badge className={`text-xs ${statusColors[response.status as keyof typeof statusColors]}`}>
+                        <Badge
+                          className={`text-xs ${statusColors[response.status as keyof typeof statusColors]}`}
+                        >
                           {response.status}
                         </Badge>
                       </div>
                       <div className="space-y-2 text-sm">
-                        {Object.entries(response.responses as Record<string, any>).map(([key, value]) => (
+                        {Object.entries(
+                          response.responses as Record<string, any>,
+                        ).map(([key, value]) => (
                           <div key={key} className="flex gap-2">
-                            <span className="text-muted-foreground">{key}:</span>
+                            <span className="text-muted-foreground">
+                              {key}:
+                            </span>
                             <span>{String(value)}</span>
                           </div>
                         ))}
                       </div>
                       {response.signedAt && (
-                        <div className="mt-2 pt-2 border-t text-xs text-muted-foreground">
+                        <div className="text-muted-foreground mt-2 border-t pt-2 text-xs">
                           Signed: {new Date(response.signedAt).toLocaleString()}
                         </div>
                       )}
@@ -503,4 +980,4 @@ export default function FormViewPage({ params }: FormViewPageProps) {
       </Tabs>
     </div>
   );
-}
+}

src/app/(dashboard)/studies/[id]/forms/page.tsx

@@ -13,7 +13,6 @@ import {
   FileQuestion,
   FileSignature,
   MoreHorizontal,
-  Pencil,
   Trash2,
   Eye,
   CheckCircle,
@@ -40,9 +39,11 @@ const formTypeIcons = {
 };
 
 const formTypeColors = {
-  consent: "bg-purple-100 text-purple-700 dark:bg-purple-900/30 dark:text-purple-400",
+  consent:
+    "bg-purple-100 text-purple-700 dark:bg-purple-900/30 dark:text-purple-400",
   survey: "bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-400",
-  questionnaire: "bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400",
+  questionnaire:
+    "bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400",
 };
 
 interface StudyFormsPageProps {
@@ -55,7 +56,9 @@ export default function StudyFormsPage({ params }: StudyFormsPageProps) {
   const { data: session } = useSession();
   const router = useRouter();
   const utils = api.useUtils();
-  const [resolvedParams, setResolvedParams] = useState<{ id: string } | null>(null);
+  const [resolvedParams, setResolvedParams] = useState<{ id: string } | null>(
+    null,
+  );
   const [search, setSearch] = useState("");
 
   useEffect(() => {
@@ -134,10 +137,11 @@ export default function StudyFormsPage({ params }: StudyFormsPageProps) {
 
       {forms.length === 0 && !isLoading ? (
         <div className="flex flex-col items-center justify-center py-12 text-center">
-          <FileText className="h-12 w-12 text-muted-foreground mb-4" />
+          <FileText className="text-muted-foreground mb-4 h-12 w-12" />
-          <h3 className="text-lg font-semibold mb-2">No Forms Yet</h3>
+          <h3 className="mb-2 text-lg font-semibold">No Forms Yet</h3>
           <p className="text-muted-foreground mb-4">
-            Create consent forms, surveys, or questionnaires to collect data from participants
+            Create consent forms, surveys, or questionnaires to collect data
+            from participants
           </p>
           {canManage && (
             <Button asChild>
@@ -151,8 +155,8 @@ export default function StudyFormsPage({ params }: StudyFormsPageProps) {
       ) : (
         <div className="space-y-4">
           <div className="flex items-center gap-4">
-            <div className="relative flex-1 max-w-sm">
+            <div className="relative max-w-sm flex-1">
-              <Search className="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
+              <Search className="text-muted-foreground absolute top-1/2 left-3 h-4 w-4 -translate-y-1/2" />
               <Input
                 placeholder="Search forms..."
                 value={search}
@@ -164,8 +168,12 @@ export default function StudyFormsPage({ params }: StudyFormsPageProps) {
 
           <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
             {forms.map((form) => {
-              const TypeIcon = formTypeIcons[form.type as keyof typeof formTypeIcons] || FileText;
+              const TypeIcon =
-              const typeColor = formTypeColors[form.type as keyof typeof formTypeColors] || "bg-gray-100";
+                formTypeIcons[form.type as keyof typeof formTypeIcons] ||
+                FileText;
+              const typeColor =
+                formTypeColors[form.type as keyof typeof formTypeColors] ||
+                "bg-gray-100";
               const isActive = form.active;
 
               return (
@@ -177,7 +185,9 @@ export default function StudyFormsPage({ params }: StudyFormsPageProps) {
                           <TypeIcon className="h-4 w-4" />
                         </div>
                         <div>
-                          <CardTitle className="text-base">{form.title}</CardTitle>
+                          <CardTitle className="text-base">
+                            {form.title}
+                          </CardTitle>
                           <p className="text-muted-foreground text-xs capitalize">
                             {form.type}
                           </p>
@@ -192,18 +202,22 @@ export default function StudyFormsPage({ params }: StudyFormsPageProps) {
                   </CardHeader>
                   <CardContent className="pb-3">
                     {form.description && (
-                      <p className="text-muted-foreground text-sm line-clamp-2 mb-3">
+                      <p className="text-muted-foreground mb-3 line-clamp-2 text-sm">
                         {form.description}
                       </p>
                     )}
-                    <div className="flex items-center justify-between text-xs text-muted-foreground">
+                    <div className="text-muted-foreground flex items-center justify-between text-xs">
                       <span>v{form.version}</span>
-                      <span>{(form as any)._count?.responses ?? 0} responses</span>
+                      <span>
+                        {(form as any)._count?.responses ?? 0} responses
+                      </span>
                     </div>
                   </CardContent>
-                  <div className="flex items-center justify-between border-t bg-muted/30 px-4 py-2">
+                  <div className="bg-muted/30 flex items-center justify-between border-t px-4 py-2">
                     <Button asChild variant="ghost" size="sm">
-                      <Link href={`/studies/${resolvedParams?.id}/forms/${form.id}`}>
+                      <Link
+                        href={`/studies/${resolvedParams?.id}/forms/${form.id}`}
+                      >
                         <Eye className="mr-1 h-3 w-3" />
                         View
                       </Link>
@@ -216,15 +230,11 @@ export default function StudyFormsPage({ params }: StudyFormsPageProps) {
                           </Button>
                         </DropdownMenuTrigger>
                         <DropdownMenuContent align="end">
-                          <DropdownMenuItem asChild>
-                            <Link href={`/studies/${resolvedParams?.id}/forms/${form.id}/edit`}>
-                              <Pencil className="mr-2 h-4 w-4" />
-                              Edit
-                            </Link>
-                          </DropdownMenuItem>
                           {!isActive && (
                             <DropdownMenuItem
-                              onClick={() => setActiveMutation.mutate({ id: form.id })}
+                              onClick={() =>
+                                setActiveMutation.mutate({ id: form.id })
+                              }
                             >
                               <CheckCircle className="mr-2 h-4 w-4" />
                               Set Active
@@ -232,7 +242,11 @@ export default function StudyFormsPage({ params }: StudyFormsPageProps) {
                           )}
                           <DropdownMenuItem
                             onClick={() => {
-                              if (confirm("Are you sure you want to delete this form?")) {
+                              if (
+                                confirm(
+                                  "Are you sure you want to delete this form?",
+                                )
+                              ) {
                                 deleteMutation.mutate({ id: form.id });
                               }
                             }}
@@ -253,4 +267,4 @@ export default function StudyFormsPage({ params }: StudyFormsPageProps) {
       )}
     </div>
   );
-}
+}

src/app/(public)/forms/[formId]/page.tsx

@@ -0,0 +1,430 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { useParams, useRouter, useSearchParams } from "next/navigation";
+import Link from "next/link";
+import {
+  FileText,
+  FileSignature,
+  ClipboardList,
+  FileQuestion,
+  CheckCircle,
+  AlertCircle,
+  Loader2,
+} from "lucide-react";
+import { Button } from "~/components/ui/button";
+import {
+  Card,
+  CardContent,
+  CardHeader,
+  CardTitle,
+  CardDescription,
+} from "~/components/ui/card";
+import { Input } from "~/components/ui/input";
+import { Label } from "~/components/ui/label";
+import { Textarea } from "~/components/ui/textarea";
+import { api } from "~/trpc/react";
+import { toast } from "sonner";
+
+interface Field {
+  id: string;
+  type: string;
+  label: string;
+  required: boolean;
+  options?: string[];
+  settings?: Record<string, any>;
+}
+
+const formTypeIcons = {
+  consent: FileSignature,
+  survey: ClipboardList,
+  questionnaire: FileQuestion,
+};
+
+export default function ParticipantFormPage() {
+  const params = useParams();
+  const searchParams = useSearchParams();
+  const formId = params.formId as string;
+
+  const [participantCode, setParticipantCode] = useState("");
+  const [formResponses, setFormResponses] = useState<Record<string, any>>({});
+  const [hasSubmitted, setHasSubmitted] = useState(false);
+  const [fieldErrors, setFieldErrors] = useState<Record<string, string>>({});
+
+  const { data: form, isLoading: formLoading } = api.forms.getPublic.useQuery(
+    { id: formId },
+    { enabled: !!formId },
+  );
+
+  const submitResponse = api.forms.submitPublic.useMutation({
+    onSuccess: () => {
+      toast.success("Response submitted successfully!");
+      setHasSubmitted(true);
+    },
+    onError: (error: { message: string }) => {
+      toast.error("Submission failed", { description: error.message });
+    },
+  });
+
+  useEffect(() => {
+    const code = searchParams.get("code");
+    if (code) {
+      setParticipantCode(code);
+    }
+  }, [searchParams]);
+
+  if (formLoading) {
+    return (
+      <div className="bg-background flex min-h-[60vh] items-center justify-center">
+        <Loader2 className="text-muted-foreground h-8 w-8 animate-spin" />
+      </div>
+    );
+  }
+
+  if (!form) {
+    return (
+      <div className="bg-background flex min-h-[60vh] flex-col items-center justify-center text-center">
+        <AlertCircle className="text-destructive mb-4 h-12 w-12" />
+        <h1 className="text-2xl font-bold">Form Not Found</h1>
+        <p className="text-muted-foreground mt-2">
+          This form may have been removed or the link is invalid.
+        </p>
+      </div>
+    );
+  }
+
+  if (hasSubmitted) {
+    return (
+      <div className="bg-background flex min-h-[60vh] flex-col items-center justify-center text-center">
+        <div className="mb-4 rounded-full bg-green-100 p-4">
+          <CheckCircle className="h-12 w-12 text-green-600" />
+        </div>
+        <h1 className="text-2xl font-bold text-green-600">Thank You!</h1>
+        <p className="text-muted-foreground mt-2 max-w-md">
+          Your response has been submitted successfully.
+          {form.type === "consent" && " Please proceed with your session."}
+        </p>
+        <Button variant="outline" className="mt-6" asChild>
+          <Link href="/">Return Home</Link>
+        </Button>
+      </div>
+    );
+  }
+
+  const TypeIcon =
+    formTypeIcons[form.type as keyof typeof formTypeIcons] || FileText;
+  const fields = (form.fields as Field[]) || [];
+
+  const validateForm = (): boolean => {
+    const errors: Record<string, string> = {};
+    let isValid = true;
+
+    fields.forEach((field) => {
+      if (field.required) {
+        const value = formResponses[field.id];
+        if (
+          value === undefined ||
+          value === null ||
+          value === "" ||
+          (typeof value === "string" && value.trim() === "")
+        ) {
+          errors[field.id] = "This field is required";
+          isValid = false;
+        }
+      }
+    });
+
+    setFieldErrors(errors);
+    return isValid;
+  };
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+
+    if (!participantCode.trim()) {
+      toast.error("Please enter your participant code");
+      return;
+    }
+
+    if (!validateForm()) {
+      toast.error("Please fill in all required fields");
+      return;
+    }
+
+    submitResponse.mutate({
+      formId,
+      participantCode: participantCode.trim(),
+      responses: formResponses,
+    });
+  };
+
+  const updateResponse = (fieldId: string, value: any) => {
+    setFormResponses({ ...formResponses, [fieldId]: value });
+    if (fieldErrors[fieldId]) {
+      const newErrors = { ...fieldErrors };
+      delete newErrors[fieldId];
+      setFieldErrors(newErrors);
+    }
+  };
+
+  return (
+    <div className="bg-background min-h-screen py-8">
+      <div className="mx-auto max-w-2xl px-4">
+        <div className="mb-8 text-center">
+          <div className="bg-primary/10 mb-4 inline-flex rounded-full p-3">
+            <TypeIcon className="text-primary h-8 w-8" />
+          </div>
+          <h1 className="text-3xl font-bold">{form.title}</h1>
+          {form.description && (
+            <p className="text-muted-foreground mt-3 text-lg">
+              {form.description}
+            </p>
+          )}
+        </div>
+
+        <Card>
+          <CardHeader>
+            <CardTitle className="text-lg">
+              {form.type === "consent"
+                ? "Consent Form"
+                : form.type === "survey"
+                  ? "Survey"
+                  : "Questionnaire"}
+            </CardTitle>
+            <CardDescription>
+              Fields marked with <span className="text-destructive">*</span> are
+              required
+            </CardDescription>
+          </CardHeader>
+          <CardContent>
+            <form onSubmit={handleSubmit} className="space-y-6">
+              <div className="space-y-2">
+                <Label htmlFor="participantCode">
+                  Participant Code <span className="text-destructive">*</span>
+                </Label>
+                <Input
+                  id="participantCode"
+                  value={participantCode}
+                  onChange={(e) => setParticipantCode(e.target.value)}
+                  placeholder="Enter your participant code (e.g., P001)"
+                  required
+                />
+                <p className="text-muted-foreground text-xs">
+                  Enter the participant code provided by the researcher
+                </p>
+              </div>
+
+              <div className="border-t pt-6">
+                {fields.map((field, index) => (
+                  <div key={field.id} className="mb-6 last:mb-0">
+                    <Label
+                      htmlFor={field.id}
+                      className={
+                        fieldErrors[field.id] ? "text-destructive" : ""
+                      }
+                    >
+                      {index + 1}. {field.label}
+                      {field.required && (
+                        <span className="text-destructive"> *</span>
+                      )}
+                    </Label>
+
+                    <div className="mt-2">
+                      {field.type === "text" && (
+                        <Input
+                          id={field.id}
+                          value={formResponses[field.id] || ""}
+                          onChange={(e) =>
+                            updateResponse(field.id, e.target.value)
+                          }
+                          placeholder="Enter your response..."
+                          className={
+                            fieldErrors[field.id] ? "border-destructive" : ""
+                          }
+                        />
+                      )}
+
+                      {field.type === "textarea" && (
+                        <Textarea
+                          id={field.id}
+                          value={formResponses[field.id] || ""}
+                          onChange={(e) =>
+                            updateResponse(field.id, e.target.value)
+                          }
+                          placeholder="Enter your response..."
+                          className={
+                            fieldErrors[field.id] ? "border-destructive" : ""
+                          }
+                        />
+                      )}
+
+                      {field.type === "multiple_choice" && (
+                        <div
+                          className={`mt-2 space-y-2 ${fieldErrors[field.id] ? "border-destructive rounded-md border p-2" : ""}`}
+                        >
+                          {field.options?.map((opt, i) => (
+                            <label
+                              key={i}
+                              className="flex cursor-pointer items-center gap-2"
+                            >
+                              <input
+                                type="radio"
+                                name={field.id}
+                                value={opt}
+                                checked={formResponses[field.id] === opt}
+                                onChange={() => updateResponse(field.id, opt)}
+                                className="h-4 w-4"
+                              />
+                              <span className="text-sm">{opt}</span>
+                            </label>
+                          ))}
+                        </div>
+                      )}
+
+                      {field.type === "checkbox" && (
+                        <div className="flex items-center gap-2">
+                          <input
+                            type="checkbox"
+                            id={field.id}
+                            checked={formResponses[field.id] || false}
+                            onChange={(e) =>
+                              updateResponse(field.id, e.target.checked)
+                            }
+                            className="h-4 w-4 rounded border-gray-300"
+                          />
+                          <Label
+                            htmlFor={field.id}
+                            className="cursor-pointer font-normal"
+                          >
+                            Yes, I agree
+                          </Label>
+                        </div>
+                      )}
+
+                      {field.type === "yes_no" && (
+                        <div className="mt-2 flex gap-4">
+                          <label className="flex cursor-pointer items-center gap-2">
+                            <input
+                              type="radio"
+                              name={field.id}
+                              value="yes"
+                              checked={formResponses[field.id] === "yes"}
+                              onChange={() => updateResponse(field.id, "yes")}
+                              className="h-4 w-4"
+                            />
+                            <span className="text-sm">Yes</span>
+                          </label>
+                          <label className="flex cursor-pointer items-center gap-2">
+                            <input
+                              type="radio"
+                              name={field.id}
+                              value="no"
+                              checked={formResponses[field.id] === "no"}
+                              onChange={() => updateResponse(field.id, "no")}
+                              className="h-4 w-4"
+                            />
+                            <span className="text-sm">No</span>
+                          </label>
+                        </div>
+                      )}
+
+                      {field.type === "rating" && (
+                        <div className="mt-2 flex flex-wrap gap-2">
+                          {Array.from(
+                            { length: field.settings?.scale || 5 },
+                            (_, i) => (
+                              <label key={i} className="cursor-pointer">
+                                <input
+                                  type="radio"
+                                  name={field.id}
+                                  value={String(i + 1)}
+                                  checked={formResponses[field.id] === i + 1}
+                                  onChange={() =>
+                                    updateResponse(field.id, i + 1)
+                                  }
+                                  className="peer sr-only"
+                                />
+                                <span className="hover:bg-muted peer-checked:bg-primary peer-checked:text-primary-foreground flex h-10 w-10 items-center justify-center rounded-full border text-sm font-medium transition-colors">
+                                  {i + 1}
+                                </span>
+                              </label>
+                            ),
+                          )}
+                        </div>
+                      )}
+
+                      {field.type === "date" && (
+                        <Input
+                          type="date"
+                          id={field.id}
+                          value={formResponses[field.id] || ""}
+                          onChange={(e) =>
+                            updateResponse(field.id, e.target.value)
+                          }
+                          className={
+                            fieldErrors[field.id] ? "border-destructive" : ""
+                          }
+                        />
+                      )}
+
+                      {field.type === "signature" && (
+                        <div className="space-y-2">
+                          <Input
+                            id={field.id}
+                            value={formResponses[field.id] || ""}
+                            onChange={(e) =>
+                              updateResponse(field.id, e.target.value)
+                            }
+                            placeholder="Type your full name as signature"
+                            className={
+                              fieldErrors[field.id] ? "border-destructive" : ""
+                            }
+                          />
+                          <p className="text-muted-foreground text-xs">
+                            By entering your name above, you confirm that the
+                            information provided is accurate.
+                          </p>
+                        </div>
+                      )}
+                    </div>
+
+                    {fieldErrors[field.id] && (
+                      <p className="text-destructive mt-1 text-sm">
+                        {fieldErrors[field.id]}
+                      </p>
+                    )}
+                  </div>
+                ))}
+              </div>
+
+              <div className="border-t pt-6">
+                <Button
+                  type="submit"
+                  size="lg"
+                  className="w-full"
+                  disabled={submitResponse.isPending}
+                >
+                  {submitResponse.isPending ? (
+                    <>
+                      <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+                      Submitting...
+                    </>
+                  ) : (
+                    <>
+                      <CheckCircle className="mr-2 h-4 w-4" />
+                      Submit Response
+                    </>
+                  )}
+                </Button>
+              </div>
+            </form>
+          </CardContent>
+        </Card>
+
+        <p className="text-muted-foreground mt-6 text-center text-sm">
+          Powered by HRIStudio
+        </p>
+      </div>
+    </div>
+  );
+}

src/app/page.tsx

@@ -1,4 +1,5 @@
 import Link from "next/link";
+import Image from "next/image";
 import { redirect } from "next/navigation";
 import { headers } from "next/headers";
 import { Button } from "~/components/ui/button";
@@ -8,18 +9,41 @@ import { Logo } from "~/components/ui/logo";
 import { auth } from "~/lib/auth";
 import {
   ArrowRight,
-  Beaker,
   Bot,
   Database,
   LayoutTemplate,
   Lock,
   Network,
-  PlayCircle,
   Settings2,
   Share2,
   Sparkles,
+  Users,
+  Beaker,
+  FileText,
+  PlayCircle,
 } from "lucide-react";
 
+const screenshots = [
+  {
+    src: "/images/screenshots/experiment-designer.png",
+    alt: "Visual Experiment Designer",
+    label: "Design",
+    className: "md:col-span-2 md:row-span-2",
+  },
+  {
+    src: "/images/screenshots/wizard-interface.png",
+    alt: "Wizard Execution Interface",
+    label: "Execute",
+    className: "",
+  },
+  {
+    src: "/images/screenshots/dashboard.png",
+    alt: "Study Dashboard",
+    label: "Dashboard",
+    className: "",
+  },
+];
+
 export default async function Home() {
   const session = await auth.api.getSession({
     headers: await headers(),
@@ -40,7 +64,7 @@ export default async function Home() {
               <Link href="#features">Features</Link>
             </Button>
             <Button variant="ghost" asChild className="hidden sm:inline-flex">
-              <Link href="#architecture">Architecture</Link>
+              <Link href="#how-it-works">How It Works</Link>
             </Button>
             <div className="bg-border hidden h-6 w-px sm:block" />
             <Button variant="ghost" asChild>
@@ -55,8 +79,7 @@ export default async function Home() {
 
       <main className="flex-1">
         {/* Hero Section */}
-        <section className="relative overflow-hidden pt-20 pb-32 md:pt-32">
+        <section className="relative overflow-hidden pt-20 pb-24 md:pt-32">
-          {/* Background Gradients */}
           <div className="bg-primary/20 absolute top-0 left-1/2 -z-10 h-[500px] w-[1000px] -translate-x-1/2 rounded-full opacity-30 blur-3xl dark:opacity-20" />
 
           <div className="container mx-auto flex flex-col items-center px-4 text-center">
@@ -65,26 +88,27 @@ export default async function Home() {
               className="mb-6 rounded-full px-4 py-1.5 text-sm font-medium"
             >
               <Sparkles className="mr-2 h-4 w-4 text-yellow-500" />
-              The Modern Standard for HRI Research
+              Open Source WoZ Platform
             </Badge>
 
             <h1 className="max-w-4xl text-5xl font-extrabold tracking-tight sm:text-6xl md:text-7xl">
-              Reproducible WoZ Studies <br className="hidden md:block" />
+              Wizard-of-Oz Studies <br className="hidden md:block" />
-              <span className="bg-gradient-to-r from-blue-600 to-violet-600 bg-clip-text text-transparent dark:from-blue-400 dark:to-violet-400">
+              <span className="bg-gradient-to-r from-cyan-500 to-blue-600 bg-clip-text text-transparent">
-                Made Simple
+                Made Scientific
               </span>
             </h1>
 
             <p className="text-muted-foreground mt-6 max-w-2xl text-lg md:text-xl">
-              HRIStudio is the open-source platform that bridges the gap between
+              HRIStudio is the open-source platform that makes human-robot
-              ease of use and scientific rigor. Design, execute, and analyze
+              interaction research reproducible, accessible, and collaborative.
-              human-robot interaction experiments with zero friction.
+              Design experiments, control robots, and analyze results — all in
+              one place.
             </p>
 
             <div className="mt-10 flex flex-col gap-4 sm:flex-row sm:justify-center">
               <Button size="lg" className="h-12 px-8 text-base" asChild>
                 <Link href="/auth/signup">
-                  Start Researching
+                  Start Your Research
                   <ArrowRight className="ml-2 h-4 w-4" />
                 </Link>
               </Button>
@@ -102,127 +126,160 @@ export default async function Home() {
                 </Link>
               </Button>
             </div>
+          </div>
+        </section>
 
-            {/* Mockup / Visual Interest */}
+        {/* Screenshots Section */}
-            <div className="bg-background/50 relative mt-20 w-full max-w-5xl rounded-xl border p-2 shadow-2xl backdrop-blur-sm lg:rounded-2xl lg:p-4">
+        <section id="screenshots" className="container mx-auto px-4 py-12">
-              <div className="via-foreground/20 absolute inset-x-0 -top-px mx-auto h-px w-3/4 bg-gradient-to-r from-transparent to-transparent" />
+          <div className="grid gap-4 md:grid-cols-3">
-              <div className="bg-muted/50 relative flex aspect-[16/9] w-full items-center justify-center overflow-hidden rounded-lg border">
+            {screenshots.map((screenshot, index) => (
-                {/* Placeholder for actual app screenshot */}
+              <div
-                <div className="absolute inset-0 bg-gradient-to-tr from-blue-500/10 to-violet-500/10" />
+                key={index}
-                <div className="p-8 text-center">
+                className={`group bg-muted/50 relative overflow-hidden rounded-xl border ${screenshot.className}`}
-                  <LayoutTemplate className="text-muted-foreground/50 mx-auto mb-4 h-16 w-16" />
+              >
-                  <p className="text-muted-foreground font-medium">
+                {/* Placeholder - replace src with actual screenshot */}
-                    Interactive Experiment Designer
+                <div className="from-muted to-muted/50 absolute inset-0 flex flex-col items-center justify-center bg-gradient-to-br">
+                  <div className="bg-background/80 mb-4 rounded-lg px-4 py-2 shadow-sm">
+                    <span className="text-muted-foreground text-xs font-medium tracking-wider uppercase">
+                      {screenshot.label}
+                    </span>
+                  </div>
+                  <FileText className="text-muted-foreground/30 h-16 w-16" />
+                  <p className="text-muted-foreground/50 mt-4 text-sm">
+                    Screenshot: {screenshot.alt}
+                  </p>
+                  <p className="text-muted-foreground/30 mt-1 text-xs">
+                    Replace with actual image
                   </p>
                 </div>
+                {/* Uncomment when you have real screenshots:
+                <Image
+                  src={screenshot.src}
+                  alt={screenshot.alt}
+                  fill
+                  className="object-cover transition-transform group-hover:scale-105"
+                />
+                */}
               </div>
+            ))}
+          </div>
+          <p className="text-muted-foreground mt-4 text-center text-sm">
+            Add screenshots to{" "}
+            <code className="bg-muted rounded px-2 py-1">
+              public/images/screenshots/
+            </code>
+          </p>
+        </section>
+
+        {/* Features Section */}
+        <section id="features" className="bg-muted/30 border-t py-24">
+          <div className="container mx-auto px-4">
+            <div className="mb-16 text-center">
+              <h2 className="text-3xl font-bold tracking-tight md:text-4xl">
+                Built for Scientific Rigor
+              </h2>
+              <p className="text-muted-foreground mx-auto mt-4 max-w-2xl text-lg">
+                Everything you need to conduct reproducible Wizard-of-Oz
+                studies, from experiment design to data analysis.
+              </p>
+            </div>
+
+            <div className="grid gap-6 md:grid-cols-2 lg:grid-cols-3">
+              <FeatureCard
+                icon={LayoutTemplate}
+                title="Visual Experiment Designer"
+                description="Build complex branching narratives with drag-and-drop blocks. No coding required — just drag, configure, and run."
+                color="blue"
+              />
+              <FeatureCard
+                icon={PlayCircle}
+                title="Guided Wizard Interface"
+                description="Step-by-step protocol execution keeps wizards on track. Every action is logged with timestamps."
+                color="violet"
+              />
+              <FeatureCard
+                icon={Bot}
+                title="Robot Agnostic"
+                description="Design experiments once, run on any robot. NAO, Pepper, TurtleBot — your logic stays the same."
+                color="green"
+              />
+              <FeatureCard
+                icon={Users}
+                title="Role-Based Collaboration"
+                description="Invite PIs, wizards, and observers. Each role sees exactly what they need — nothing more."
+                color="orange"
+              />
+              <FeatureCard
+                icon={Database}
+                title="Automatic Data Logging"
+                description="Every action, timestamp, and sensor reading is captured. Export to CSV for analysis."
+                color="rose"
+              />
+              <FeatureCard
+                icon={Lock}
+                title="Built-in Reproducibility"
+                description="Protocol/trial separation, deviation logging, and comprehensive audit trails make replication trivial."
+                color="cyan"
+              />
             </div>
           </div>
         </section>
 
-        {/* Features Bento Grid */}
+        {/* How It Works */}
-        <section id="features" className="container mx-auto px-4 py-24">
+        <section id="how-it-works" className="container mx-auto px-4 py-24">
-          <div className="mb-12 text-center">
+          <div className="mb-16 text-center">
             <h2 className="text-3xl font-bold tracking-tight md:text-4xl">
-              Everything You Need
+              How It Works
             </h2>
             <p className="text-muted-foreground mt-4 text-lg">
-              Built for the specific needs of HRI researchers and wizards.
+              From design to publication in one unified workflow.
             </p>
           </div>
 
-          <div className="grid gap-4 md:grid-cols-3 lg:grid-cols-4 lg:grid-rows-2">
+          <div className="relative">
-            {/* Visual Designer - Large Item */}
+            {/* Connection line */}
-            <Card className="col-span-1 row-span-2 flex flex-col overflow-hidden bg-gradient-to-br from-blue-500/5 to-violet-500/5 md:col-span-2 lg:col-span-2 dark:from-blue-900/10 dark:to-violet-900/10">
+            <div className="bg-border absolute top-0 left-1/2 hidden h-full w-px -translate-x-1/2 lg:block" />
-              <CardHeader>
-                <CardTitle className="flex items-center gap-2">
-                  <LayoutTemplate className="h-5 w-5 text-blue-500" />
-                  Visual Experiment Designer
-                </CardTitle>
-              </CardHeader>
-              <CardContent className="flex-1">
-                <p className="text-muted-foreground mb-6">
-                  Construct complex branching narratives without writing a
-                  single line of code. Our node-based editor handles logic,
-                  timing, and robot actions automatically.
-                </p>
-                <div className="bg-background/50 flex h-full min-h-[200px] items-center justify-center rounded-lg border p-4 shadow-inner">
-                  <div className="text-muted-foreground flex items-center gap-2 text-sm">
-                    <span className="bg-accent rounded p-2">Start</span>
-                    <ArrowRight className="h-4 w-4" />
-                    <span className="bg-primary/10 border-primary/20 text-primary rounded border p-2 font-medium">
-                      Robot: Greet
-                    </span>
-                    <ArrowRight className="h-4 w-4" />
-                    <span className="bg-accent rounded p-2">Wait: 5s</span>
-                  </div>
-                </div>
-              </CardContent>
-            </Card>
 
-            {/* Robot Agnostic */}
+            <div className="space-y-12 lg:space-y-0">
-            <Card className="col-span-1 md:col-span-1 lg:col-span-2">
+              <WorkflowStep
-              <CardHeader>
+                number={1}
-                <CardTitle className="flex items-center gap-2">
+                title="Design"
-                  <Bot className="h-5 w-5 text-green-500" />
+                description="Use the visual editor to build your experiment protocol with drag-and-drop blocks. Add speech, gestures, conditions, and branching logic — no code required."
-                  Robot Agnostic
+                icon={LayoutTemplate}
-                </CardTitle>
+              />
-              </CardHeader>
+              <WorkflowStep
-              <CardContent>
+                number={2}
-                <p className="text-muted-foreground">
+                title="Configure"
-                  Switch between robots instantly. Whether it's a NAO, Pepper,
+                description="Set up your study, invite team members with appropriate roles, and configure your robot platform."
-                  or a custom ROS2 bot, your experiment logic remains strictly
+                icon={Settings2}
-                  separated from hardware implementation.
+              />
-                </p>
+              <WorkflowStep
-              </CardContent>
+                number={3}
-            </Card>
+                title="Execute"
-
+                description="Run trials with the wizard interface. Real-time updates keep everyone in sync. Every action is automatically logged."
-            {/* Role Based */}
+                icon={PlayCircle}
-            <Card className="bg-muted/30 col-span-1 md:col-span-1 lg:col-span-1">
+              />
-              <CardHeader>
+              <WorkflowStep
-                <CardTitle className="flex items-center gap-2 text-base">
+                number={4}
-                  <Lock className="h-4 w-4 text-orange-500" />
+                title="Analyze"
-                  Role-Based Access
+                description="Review trial data, export responses, and compare across participants. Everything is timestamped and synchronized."
-                </CardTitle>
+                icon={Share2}
-              </CardHeader>
+              />
-              <CardContent>
+            </div>
-                <p className="text-muted-foreground text-sm">
-                  Granular permissions for Principal Investigators, Wizards, and
-                  Observers.
-                </p>
-              </CardContent>
-            </Card>
-
-            {/* Data Logging */}
-            <Card className="bg-muted/30 col-span-1 md:col-span-1 lg:col-span-1">
-              <CardHeader>
-                <CardTitle className="flex items-center gap-2 text-base">
-                  <Database className="h-4 w-4 text-rose-500" />
-                  Full Traceability
-                </CardTitle>
-              </CardHeader>
-              <CardContent>
-                <p className="text-muted-foreground text-sm">
-                  Every wizard action, automated response, and sensor reading is
-                  time-stamped and logged.
-                </p>
-              </CardContent>
-            </Card>
           </div>
         </section>
 
         {/* Architecture Section */}
         <section id="architecture" className="bg-muted/30 border-t py-24">
           <div className="container mx-auto px-4">
-            <div className="grid items-center gap-12 lg:grid-cols-2 lg:gap-8">
+            <div className="grid items-center gap-12 lg:grid-cols-2">
               <div>
                 <h2 className="text-3xl font-bold tracking-tight">
-                  Enterprise-Grade Architecture
+                  Modern Architecture
                 </h2>
                 <p className="text-muted-foreground mt-4 text-lg">
-                  Designed for reliability and scale. HRIStudio uses a modern
+                  Built on proven technologies for reliability, type safety, and
-                  stack to ensure your data is safe and your experiments run
+                  real-time collaboration.
-                  smoothly.
                 </p>
 
                 <div className="mt-8 space-y-4">
@@ -232,9 +289,9 @@ export default async function Home() {
                     </div>
                     <div>
                       <h3 className="font-semibold">3-Layer Design</h3>
-                      <p className="text-muted-foreground">
+                      <p className="text-muted-foreground text-sm">
-                        Clear separation between UI, Data, and Hardware layers
+                        UI, application logic, and hardware layers are strictly
-                        for maximum stability.
+                        separated for stability.
                       </p>
                     </div>
                   </div>
@@ -243,72 +300,74 @@ export default async function Home() {
                       <Share2 className="text-primary h-5 w-5" />
                     </div>
                     <div>
-                      <h3 className="font-semibold">
+                      <h3 className="font-semibold">Real-Time Sync</h3>
-                        Collaborative by Default
+                      <p className="text-muted-foreground text-sm">
-                      </h3>
+                        WebSocket updates keep wizard and observer views
-                      <p className="text-muted-foreground">
+                        perfectly synchronized.
-                        Real-time state synchronization allows multiple
-                        researchers to monitor a single trial.
                       </p>
                     </div>
                   </div>
                   <div className="flex gap-4">
                     <div className="bg-background flex h-10 w-10 shrink-0 items-center justify-center rounded-lg border shadow-sm">
-                      <Settings2 className="text-primary h-5 w-5" />
+                      <Beaker className="text-primary h-5 w-5" />
                     </div>
                     <div>
-                      <h3 className="font-semibold">ROS2 Integration</h3>
+                      <h3 className="font-semibold">Plugin System</h3>
-                      <p className="text-muted-foreground">
+                      <p className="text-muted-foreground text-sm">
-                        Native support for ROS2 nodes, topics, and actions right
+                        Extend with custom robot integrations and actions
-                        out of the box.
+                        through a simple JSON configuration.
                       </p>
                     </div>
                   </div>
                 </div>
               </div>
 
-              <div className="relative mx-auto w-full max-w-[500px]">
+              <div className="relative space-y-4">
-                {/* Abstract representation of architecture */}
+                <Card className="border-blue-500/20 bg-blue-500/5">
-                <div className="relative z-10 space-y-4">
+                  <CardHeader className="pb-2">
-                  <Card className="relative left-0 cursor-default border-blue-500/20 bg-blue-500/5 transition-all hover:left-2">
+                    <CardTitle className="font-mono text-sm text-blue-600 dark:text-blue-400">
-                    <CardHeader className="pb-2">
+                      APP LAYER
-                      <CardTitle className="font-mono text-sm text-blue-600 dark:text-blue-400">
+                    </CardTitle>
-                        APP LAYER
+                  </CardHeader>
-                      </CardTitle>
+                  <CardContent>
-                    </CardHeader>
+                    <p className="text-sm font-medium">
-                    <CardContent>
+                      Next.js + React + tRPC
-                      <p className="font-semibold">
+                    </p>
-                        Next.js Dashboard + Experiment Designer
+                    <p className="text-muted-foreground text-xs">
-                      </p>
+                      Type-safe full-stack
-                    </CardContent>
+                    </p>
-                  </Card>
+                  </CardContent>
-                  <Card className="relative left-4 cursor-default border-violet-500/20 bg-violet-500/5 transition-all hover:left-6">
+                </Card>
-                    <CardHeader className="pb-2">
+                <Card className="border-violet-500/20 bg-violet-500/5">
-                      <CardTitle className="font-mono text-sm text-violet-600 dark:text-violet-400">
+                  <CardHeader className="pb-2">
-                        DATA LAYER
+                    <CardTitle className="font-mono text-sm text-violet-600 dark:text-violet-400">
-                      </CardTitle>
+                      DATA LAYER
-                    </CardHeader>
+                    </CardTitle>
-                    <CardContent>
+                  </CardHeader>
-                      <p className="font-semibold">
+                  <CardContent>
-                        PostgreSQL + MinIO + TRPC API
+                    <p className="text-sm font-medium">
-                      </p>
+                      PostgreSQL + MinIO + WebSocket
-                    </CardContent>
+                    </p>
-                  </Card>
+                    <p className="text-muted-foreground text-xs">
-                  <Card className="relative left-8 cursor-default border-green-500/20 bg-green-500/5 transition-all hover:left-10">
+                      Persistent storage + real-time
-                    <CardHeader className="pb-2">
+                    </p>
-                      <CardTitle className="font-mono text-sm text-green-600 dark:text-green-400">
+                  </CardContent>
-                        HARDWARE LAYER
+                </Card>
-                      </CardTitle>
+                <Card className="border-green-500/20 bg-green-500/5">
-                    </CardHeader>
+                  <CardHeader className="pb-2">
-                    <CardContent>
+                    <CardTitle className="font-mono text-sm text-green-600 dark:text-green-400">
-                      <p className="font-semibold">
+                      ROBOT LAYER
-                        ROS2 Bridge + Robot Plugins
+                    </CardTitle>
-                      </p>
+                  </CardHeader>
-                    </CardContent>
+                  <CardContent>
-                  </Card>
+                    <p className="text-sm font-medium">
-                </div>
+                      ROS2 Bridge + Plugin Config
-                {/* Decorative blobs */}
+                    </p>
-                <div className="bg-primary/10 absolute top-1/2 left-1/2 -z-10 h-[300px] w-[300px] -translate-x-1/2 -translate-y-1/2 rounded-full blur-3xl" />
+                    <p className="text-muted-foreground text-xs">
+                      Platform agnostic
+                    </p>
+                  </CardContent>
+                </Card>
               </div>
             </div>
           </div>
@@ -316,21 +375,33 @@ export default async function Home() {
 
         {/* CTA Section */}
         <section className="container mx-auto px-4 py-24 text-center">
-          <h2 className="text-3xl font-bold tracking-tight md:text-4xl">
+          <div className="mx-auto max-w-2xl">
-            Ready to upgrade your lab?
+            <h2 className="text-3xl font-bold tracking-tight md:text-4xl">
-          </h2>
+              Ready to upgrade your research?
-          <p className="text-muted-foreground mx-auto mt-4 max-w-2xl text-lg">
+            </h2>
-            Join the community of researchers building the future of HRI with
+            <p className="text-muted-foreground mt-4 text-lg">
-            reproducible, open-source tools.
+              Join researchers building reproducible HRI studies with
-          </p>
+              open-source tools.
-          <div className="mt-8">
+            </p>
-            <Button
+            <div className="mt-8 flex flex-col gap-4 sm:flex-row sm:justify-center">
-              size="lg"
+              <Button
-              className="shadow-primary/20 h-12 px-8 text-base shadow-lg"
+                size="lg"
-              asChild
+                className="shadow-primary/20 h-12 px-8 text-base shadow-lg"
-            >
+                asChild
-              <Link href="/auth/signup">Get Started for Free</Link>
+              >
-            </Button>
+                <Link href="/auth/signup">Get Started Free</Link>
+              </Button>
+              <Button
+                size="lg"
+                variant="outline"
+                className="h-12 px-8 text-base"
+                asChild
+              >
+                <Link href="/docs" target="_blank">
+                  Read the Docs
+                </Link>
+              </Button>
+            </div>
           </div>
         </section>
       </main>
@@ -340,25 +411,96 @@ export default async function Home() {
           <div className="flex flex-col gap-2">
             <Logo iconSize="sm" showText={true} />
             <p className="text-muted-foreground text-sm">
-              &copy; {new Date().getFullYear()} HRIStudio. All rights reserved.
+              &copy; {new Date().getFullYear()} HRIStudio. Open source under MIT
+              License.
             </p>
           </div>
           <div className="text-muted-foreground flex gap-6 text-sm">
+            <Link href="/docs" className="hover:text-foreground">
+              Docs
+            </Link>
+            <Link
+              href="https://github.com/robolab/hristudio"
+              className="hover:text-foreground"
+              target="_blank"
+            >
+              GitHub
+            </Link>
             <Link href="#" className="hover:text-foreground">
               Privacy
             </Link>
             <Link href="#" className="hover:text-foreground">
               Terms
             </Link>
-            <Link href="#" className="hover:text-foreground">
-              GitHub
-            </Link>
-            <Link href="#" className="hover:text-foreground">
-              Documentation
-            </Link>
           </div>
         </div>
       </footer>
     </div>
   );
 }
+
+function FeatureCard({
+  icon: Icon,
+  title,
+  description,
+  color,
+}: {
+  icon: React.ComponentType<{ className?: string }>;
+  title: string;
+  description: string;
+  color: "blue" | "violet" | "green" | "orange" | "rose" | "cyan";
+}) {
+  const colors = {
+    blue: "text-blue-500 bg-blue-500/10",
+    violet: "text-violet-500 bg-violet-500/10",
+    green: "text-green-500 bg-green-500/10",
+    orange: "text-orange-500 bg-orange-500/10",
+    rose: "text-rose-500 bg-rose-500/10",
+    cyan: "text-cyan-500 bg-cyan-500/10",
+  };
+
+  return (
+    <Card>
+      <CardHeader>
+        <div
+          className={`mb-2 inline-flex h-10 w-10 items-center justify-center rounded-lg ${colors[color]}`}
+        >
+          <Icon className="h-5 w-5" />
+        </div>
+        <CardTitle className="text-lg">{title}</CardTitle>
+      </CardHeader>
+      <CardContent>
+        <p className="text-muted-foreground text-sm">{description}</p>
+      </CardContent>
+    </Card>
+  );
+}
+
+function WorkflowStep({
+  number,
+  title,
+  description,
+  icon: Icon,
+}: {
+  number: number;
+  title: string;
+  description: string;
+  icon: React.ComponentType<{ className?: string }>;
+}) {
+  return (
+    <div className="relative flex flex-col items-center gap-4 lg:flex-row lg:gap-8">
+      <div className="border-primary bg-background text-primary z-10 flex h-12 w-12 shrink-0 items-center justify-center rounded-full border-2 font-bold">
+        {number}
+      </div>
+      <Card className="flex-1">
+        <CardHeader className="flex flex-row items-center gap-4 pb-2">
+          <Icon className="text-primary h-5 w-5" />
+          <CardTitle>{title}</CardTitle>
+        </CardHeader>
+        <CardContent>
+          <p className="text-muted-foreground">{description}</p>
+        </CardContent>
+      </Card>
+    </div>
+  );
+}

src/server/api/routers/forms.ts

@@ -2,7 +2,11 @@ import { TRPCError } from "@trpc/server";
 import { and, count, desc, eq, ilike, or } from "drizzle-orm";
 import { z } from "zod";
 
-import { createTRPCRouter, protectedProcedure } from "~/server/api/trpc";
+import {
+  createTRPCRouter,
+  protectedProcedure,
+  publicProcedure,
+} from "~/server/api/trpc";
 import {
   activityLogs,
   formResponses,
@@ -11,6 +15,7 @@ import {
   formFieldTypeEnum,
   participants,
   studyMembers,
+  studies,
   userSystemRoles,
 } from "~/server/db/schema";
 
@@ -60,7 +65,7 @@ async function checkStudyAccess(
 
 export const formsRouter = createTRPCRouter({
   list: protectedProcedure
-      .input(
+    .input(
       z.object({
         studyId: z.string().uuid(),
         type: z.enum(formTypes).optional(),
@@ -116,8 +121,11 @@ export const formsRouter = createTRPCRouter({
             .select({ count: count() })
             .from(formResponses)
             .where(eq(formResponses.formId, form.id));
-          return { ...form, _count: { responses: responseCount[0]?.count ?? 0 } };
+          return {
-        })
+            ...form,
+            _count: { responses: responseCount[0]?.count ?? 0 },
+          };
+        }),
       );
 
       return {
@@ -178,16 +186,18 @@ export const formsRouter = createTRPCRouter({
         type: z.enum(formTypes),
         title: z.string().min(1).max(255),
         description: z.string().optional(),
-        fields: z.array(
+        fields: z
-          z.object({
+          .array(
-            id: z.string(),
+            z.object({
-            type: z.string(),
+              id: z.string(),
-            label: z.string(),
+              type: z.string(),
-            required: z.boolean().default(false),
+              label: z.string(),
-            options: z.array(z.string()).optional(),
+              required: z.boolean().default(false),
-            settings: z.record(z.string(), z.any()).optional(),
+              options: z.array(z.string()).optional(),
-          }),
+              settings: z.record(z.string(), z.any()).optional(),
-        ).default([]),
+            }),
+          )
+          .default([]),
         settings: z.record(z.string(), z.any()).optional(),
         isTemplate: z.boolean().optional(),
         templateName: z.string().max(100).optional(),
@@ -195,7 +205,7 @@ export const formsRouter = createTRPCRouter({
     )
     .mutation(async ({ ctx, input }) => {
       const { isTemplate, templateName, ...formData } = input;
-      
+
       if (isTemplate && !templateName) {
         throw new TRPCError({
           code: "BAD_REQUEST",
@@ -248,16 +258,18 @@ export const formsRouter = createTRPCRouter({
         id: z.string().uuid(),
         title: z.string().min(1).max(255).optional(),
         description: z.string().optional(),
-        fields: z.array(
+        fields: z
-          z.object({
+          .array(
-            id: z.string(),
+            z.object({
-            type: z.string(),
+              id: z.string(),
-            label: z.string(),
+              type: z.string(),
-            required: z.boolean().default(false),
+              label: z.string(),
-            options: z.array(z.string()).optional(),
+              required: z.boolean().default(false),
-            settings: z.record(z.string(), z.any()).optional(),
+              options: z.array(z.string()).optional(),
-          }),
+              settings: z.record(z.string(), z.any()).optional(),
-        ).optional(),
+            }),
+          )
+          .optional(),
         settings: z.record(z.string(), z.any()).optional(),
       }),
     )
@@ -275,10 +287,12 @@ export const formsRouter = createTRPCRouter({
         });
       }
 
-      await checkStudyAccess(ctx.db, ctx.session.user.id, existingForm.studyId, [
+      await checkStudyAccess(
-        "owner",
+        ctx.db,
-        "researcher",
+        ctx.session.user.id,
-      ]);
+        existingForm.studyId,
+        ["owner", "researcher"],
+      );
 
       const [updatedForm] = await ctx.db
         .update(forms)
@@ -407,10 +421,12 @@ export const formsRouter = createTRPCRouter({
         });
       }
 
-      await checkStudyAccess(ctx.db, ctx.session.user.id, existingForm.studyId, [
+      await checkStudyAccess(
-        "owner",
+        ctx.db,
-        "researcher",
+        ctx.session.user.id,
-      ]);
+        existingForm.studyId,
+        ["owner", "researcher"],
+      );
 
       const latestForm = await ctx.db.query.forms.findFirst({
         where: eq(forms.studyId, existingForm.studyId),
@@ -517,6 +533,81 @@ export const formsRouter = createTRPCRouter({
       };
     }),
 
+  exportCsv: protectedProcedure
+    .input(z.object({ formId: z.string().uuid() }))
+    .query(async ({ ctx, input }) => {
+      const form = await ctx.db.query.forms.findFirst({
+        where: eq(forms.id, input.formId),
+      });
+
+      if (!form) {
+        throw new TRPCError({
+          code: "NOT_FOUND",
+          message: "Form not found",
+        });
+      }
+
+      await checkStudyAccess(ctx.db, ctx.session.user.id, form.studyId);
+
+      const responses = await ctx.db.query.formResponses.findMany({
+        where: eq(formResponses.formId, input.formId),
+        with: {
+          participant: {
+            columns: {
+              id: true,
+              participantCode: true,
+              name: true,
+              email: true,
+            },
+          },
+        },
+        orderBy: [desc(formResponses.submittedAt)],
+      });
+
+      const fields = form.fields as Array<{
+        id: string;
+        label: string;
+        type: string;
+      }>;
+      const headers = [
+        "Participant Code",
+        "Name",
+        "Email",
+        "Status",
+        "Submitted At",
+        ...fields.map((f) => f.label),
+      ];
+
+      const rows = responses.map((r) => {
+        const participantResponses = r.responses as Record<string, any>;
+        return [
+          r.participant?.participantCode ?? "",
+          r.participant?.name ?? "",
+          r.participant?.email ?? "",
+          r.status,
+          r.submittedAt?.toISOString() ?? "",
+          ...fields.map((f) => {
+            const val = participantResponses[f.id];
+            if (val === undefined || val === null) return "";
+            if (typeof val === "boolean") return val ? "Yes" : "No";
+            return String(val);
+          }),
+        ];
+      });
+
+      const escape = (s: string | null | undefined) =>
+        `"${String(s ?? "").replace(/"/g, '""')}"`;
+      const csv = [
+        headers.map((h) => escape(h)).join(","),
+        ...rows.map((row) => row.map((cell) => escape(cell)).join(",")),
+      ].join("\n");
+
+      return {
+        csv,
+        filename: `${form.title.replace(/\s+/g, "_")}_responses.csv`,
+      };
+    }),
+
   submitResponse: protectedProcedure
     .input(
       z.object({
@@ -596,22 +687,24 @@ export const formsRouter = createTRPCRouter({
             .select({ count: count() })
             .from(formResponses)
             .where(eq(formResponses.formId, form.id));
-          return { ...form, _count: { responses: responseCount[0]?.count ?? 0 } };
+          return {
-        })
+            ...form,
+            _count: { responses: responseCount[0]?.count ?? 0 },
+          };
+        }),
       );
 
       return formsWithCounts;
     }),
 
-  listTemplates: protectedProcedure
+  listTemplates: protectedProcedure.query(async ({ ctx }) => {
-    .query(async ({ ctx }) => {
+    const templates = await ctx.db.query.forms.findMany({
-      const templates = await ctx.db.query.forms.findMany({
+      where: eq(forms.isTemplate, true),
-        where: eq(forms.isTemplate, true),
+      orderBy: [desc(forms.updatedAt)],
-        orderBy: [desc(forms.updatedAt)],
+    });
-      });
 
-      return templates;
+    return templates;
-    }),
+  }),
 
   createFromTemplate: protectedProcedure
     .input(
@@ -628,10 +721,7 @@ export const formsRouter = createTRPCRouter({
       ]);
 
       const template = await ctx.db.query.forms.findFirst({
-        where: and(
+        where: and(eq(forms.id, input.templateId), eq(forms.isTemplate, true)),
-          eq(forms.id, input.templateId),
-          eq(forms.isTemplate, true),
-        ),
       });
 
       if (!template) {
@@ -673,4 +763,101 @@ export const formsRouter = createTRPCRouter({
 
       return newForm;
     }),
-});
+
+  getPublic: publicProcedure
+    .input(z.object({ id: z.string().uuid() }))
+    .query(async ({ ctx, input }) => {
+      const form = await ctx.db.query.forms.findFirst({
+        where: and(eq(forms.id, input.id), eq(forms.active, true)),
+        columns: {
+          id: true,
+          studyId: true,
+          type: true,
+          title: true,
+          description: true,
+          version: true,
+          fields: true,
+          settings: true,
+        },
+      });
+
+      if (!form) {
+        throw new TRPCError({
+          code: "NOT_FOUND",
+          message: "Form not found or not active",
+        });
+      }
+
+      const study = await ctx.db.query.studies.findFirst({
+        where: eq(studies.id, form.studyId),
+        columns: {
+          name: true,
+        },
+      });
+
+      return { ...form, studyName: study?.name };
+    }),
+
+  submitPublic: publicProcedure
+    .input(
+      z.object({
+        formId: z.string().uuid(),
+        participantCode: z.string().min(1).max(100),
+        responses: z.record(z.string(), z.any()),
+      }),
+    )
+    .mutation(async ({ ctx, input }) => {
+      const { formId, participantCode, responses } = input;
+
+      const form = await ctx.db.query.forms.findFirst({
+        where: and(eq(forms.id, formId), eq(forms.active, true)),
+      });
+
+      if (!form) {
+        throw new TRPCError({
+          code: "NOT_FOUND",
+          message: "Form not found or not active",
+        });
+      }
+
+      const participant = await ctx.db.query.participants.findFirst({
+        where: and(
+          eq(participants.studyId, form.studyId),
+          eq(participants.participantCode, participantCode),
+        ),
+      });
+
+      if (!participant) {
+        throw new TRPCError({
+          code: "NOT_FOUND",
+          message: "Invalid participant code",
+        });
+      }
+
+      const existingResponse = await ctx.db.query.formResponses.findFirst({
+        where: and(
+          eq(formResponses.formId, formId),
+          eq(formResponses.participantId, participant.id),
+        ),
+      });
+
+      if (existingResponse) {
+        throw new TRPCError({
+          code: "CONFLICT",
+          message: "You have already submitted this form",
+        });
+      }
+
+      const [newResponse] = await ctx.db
+        .insert(formResponses)
+        .values({
+          formId,
+          participantId: participant.id,
+          responses,
+          status: "completed",
+        })
+        .returning();
+
+      return newResponse;
+    }),
+});