diff --git a/src/components/carreras/CarreraDetailDialog.tsx b/src/components/carreras/CarreraDetailDialog.tsx
index ab3cd5d..b85d6b5 100644
--- a/src/components/carreras/CarreraDetailDialog.tsx
+++ b/src/components/carreras/CarreraDetailDialog.tsx
@@ -58,7 +58,7 @@ export function CarreraDetailDialog({
         <Dialog open={!!carrera} onOpenChange={(o) => !o && onOpenChange(null)}>
             <DialogContent className="max-w-3xl">
                 <DialogHeader>
-                    <DialogTitle>{carrera?.nombre}</DialogTitle>
+                    <DialogTitle className="font-mono" >{carrera?.nombre}</DialogTitle>
                     <DialogDescription>
                         {carrera?.facultades?.nombre ?? "—"} · {carrera?.semestres} semestres{" "}
                         {typeof carrera?.activo === "boolean" && (
diff --git a/src/components/carreras/CarreraFormDialog.tsx b/src/components/carreras/CarreraFormDialog.tsx
index b92a8b3..d06bd07 100644
--- a/src/components/carreras/CarreraFormDialog.tsx
+++ b/src/components/carreras/CarreraFormDialog.tsx
@@ -75,7 +75,7 @@ export function CarreraFormDialog({
         <Dialog open={open} onOpenChange={onOpenChange}>
             <DialogContent className="max-w-lg">
                 <DialogHeader>
-                    <DialogTitle>{mode === "create" ? "Nueva carrera" : "Editar carrera"}</DialogTitle>
+                    <DialogTitle className="font-mono" >{mode === "create" ? "Nueva carrera" : "Editar carrera"}</DialogTitle>
                     <DialogDescription>
                         {mode === "create" ? "Crea una nueva carrera en la base de datos." : "Actualiza los datos de la carrera."}
                     </DialogDescription>
diff --git a/src/components/carreras/CriterioFormDialog.tsx b/src/components/carreras/CriterioFormDialog.tsx
index 814b472..2feadb3 100644
--- a/src/components/carreras/CriterioFormDialog.tsx
+++ b/src/components/carreras/CriterioFormDialog.tsx
@@ -68,7 +68,7 @@ export function CriterioFormDialog({
     <Dialog open={open} onOpenChange={onOpenChange}>
       <DialogContent className="max-w-lg">
         <DialogHeader>
-          <DialogTitle>Nuevo criterio</DialogTitle>
+          <DialogTitle className="font-mono" >Nuevo criterio</DialogTitle>
           <DialogDescription>Agrega un criterio para esta carrera.</DialogDescription>
         </DialogHeader>
 
diff --git a/src/components/carreras/DeleteCarreras.tsx b/src/components/carreras/DeleteCarreras.tsx
index cf54e14..0ba0579 100644
--- a/src/components/carreras/DeleteCarreras.tsx
+++ b/src/components/carreras/DeleteCarreras.tsx
@@ -33,7 +33,7 @@ export function useDeleteCarreraDialog(carreraId: string, onDeleted?: () => void
         <Dialog open={open} onOpenChange={setOpen}>
             <DialogContent>
                 <DialogHeader>
-                    <DialogTitle>¿Eliminar carrera?</DialogTitle>
+                    <DialogTitle className="font-mono" >¿Eliminar carrera?</DialogTitle>
                     <DialogDescription>
                         Esta acción no se puede deshacer. ¿Seguro que quieres eliminar esta carrera?
                     </DialogDescription>
diff --git a/src/components/planes/AddAsignaturaButton.tsx b/src/components/planes/AddAsignaturaButton.tsx
index 4457399..7e189da 100644
--- a/src/components/planes/AddAsignaturaButton.tsx
+++ b/src/components/planes/AddAsignaturaButton.tsx
@@ -84,7 +84,7 @@ export function AddAsignaturaButton({ planId, onAdded }: { planId: string; onAdd
       <Dialog open={open} onOpenChange={setOpen}>
         <DialogContent className="w-[min(92vw,760px)]">
           <DialogHeader>
-            <DialogTitle>Nueva asignatura</DialogTitle>
+            <DialogTitle className="font-mono" >Nueva asignatura</DialogTitle>
             <DialogDescription>Elige cómo crearla: manual o generada por IA.</DialogDescription>
           </DialogHeader>
 
diff --git a/src/components/planes/AdjustAIButton.tsx b/src/components/planes/AdjustAIButton.tsx
index 71aa455..395a434 100644
--- a/src/components/planes/AdjustAIButton.tsx
+++ b/src/components/planes/AdjustAIButton.tsx
@@ -31,7 +31,7 @@ export function AdjustAIButton({ plan }: { plan: PlanFull }) {
       <Dialog open={open} onOpenChange={setOpen}>
         <DialogContent className="max-w-lg">
           <DialogHeader>
-            <DialogTitle>Ajustar con IA</DialogTitle>
+            <DialogTitle className="font-mono" >Ajustar con IA</DialogTitle>
             <DialogDescription>Describe cómo quieres modificar el plan actual.</DialogDescription>
           </DialogHeader>
           <Textarea value={prompt} onChange={(e) => setPrompt(e.target.value)} placeholder="Ej.: Enfatiza ciberseguridad y proyectos prácticos…" className="min-h-[120px]" />
diff --git a/src/components/planes/CreatePlanDialog.tsx b/src/components/planes/CreatePlanDialog.tsx
index 1a6764c..aeeb478 100644
--- a/src/components/planes/CreatePlanDialog.tsx
+++ b/src/components/planes/CreatePlanDialog.tsx
@@ -57,7 +57,7 @@ export function CreatePlanDialog({ open, onOpenChange }: { open: boolean; onOpen
     <Dialog open={open} onOpenChange={onOpenChange}>
       <DialogContent className="w-[min(92vw,760px)]">
         <DialogHeader>
-          <DialogTitle>Nuevo plan de estudios (IA)</DialogTitle>
+          <DialogTitle className="font-mono" >Nuevo plan de estudios (IA)</DialogTitle>
         </DialogHeader>
         <div className="grid gap-4 md:grid-cols-2">
           <div className="md:col-span-2 space-y-1">
diff --git a/src/components/planes/EditPlanButton.tsx b/src/components/planes/EditPlanButton.tsx
index 8a1c0da..b6b3601 100644
--- a/src/components/planes/EditPlanButton.tsx
+++ b/src/components/planes/EditPlanButton.tsx
@@ -54,7 +54,7 @@ export function EditPlanButton({ plan }: { plan: PlanFull }) {
       <Dialog open={open} onOpenChange={setOpen}>
         <DialogContent className="max-w-lg">
           <DialogHeader>
-            <DialogTitle>Editar plan</DialogTitle>
+            <DialogTitle className="font-mono" >Editar plan</DialogTitle>
             <DialogDescription>Actualiza datos básicos.</DialogDescription>
           </DialogHeader>
           <div className="grid gap-3">
diff --git a/src/components/planes/academic-sections.tsx b/src/components/planes/academic-sections.tsx
index 9109a70..441c844 100644
--- a/src/components/planes/academic-sections.tsx
+++ b/src/components/planes/academic-sections.tsx
@@ -196,7 +196,7 @@ export function AcademicSections({ planId, color }: { planId: string; color?: st
       <Dialog open={!!editing} onOpenChange={(o) => { if (!o) setEditing(null) }}>
         <DialogContent className="max-w-2xl">
           <DialogHeader>
-            <DialogTitle>{editing ? `Editar: ${sections.find((x) => x.key === editing.key)?.title}` : ""}</DialogTitle>
+            <DialogTitle className="font-mono" >{editing ? `Editar: ${sections.find((x) => x.key === editing.key)?.title}` : ""}</DialogTitle>
           </DialogHeader>
           <Textarea value={draft} onChange={(e) => setDraft(e.target.value)} className={`min-h-[260px] ${editing?.key === "prompt" ? "font-mono" : ""}`} placeholder="Escribe aquí…" />
           <DialogFooter>
diff --git a/src/components/ui/command.tsx b/src/components/ui/command.tsx
index 8cb4ca7..db6c513 100644
--- a/src/components/ui/command.tsx
+++ b/src/components/ui/command.tsx
@@ -45,7 +45,7 @@ function CommandDialog({
   return (
     <Dialog {...props}>
       <DialogHeader className="sr-only">
-        <DialogTitle>{title}</DialogTitle>
+        <DialogTitle className="font-mono" >{title}</DialogTitle>
         <DialogDescription>{description}</DialogDescription>
       </DialogHeader>
       <DialogContent
diff --git a/src/routes/_authenticated/archivos.tsx b/src/routes/_authenticated/archivos.tsx
index 825e782..f54a322 100644
--- a/src/routes/_authenticated/archivos.tsx
+++ b/src/routes/_authenticated/archivos.tsx
@@ -206,7 +206,7 @@ function DetailDialog({ row, onClose }: { row: RefRow | null; onClose: () => voi
     <Dialog open={!!row} onOpenChange={(o) => !o && onClose()}>
       <DialogContent className="max-w-3xl">
         <DialogHeader>
-          <DialogTitle>{row?.titulo_archivo ?? "(Sin título)"}</DialogTitle>
+          <DialogTitle className="font-mono" >{row?.titulo_archivo ?? "(Sin título)"}</DialogTitle>
           <DialogDescription>
             {row?.descripcion || "Sin descripción"}
           </DialogDescription>
@@ -333,7 +333,7 @@ function UploadDialog({
     <Dialog open={open} onOpenChange={onOpenChange}>
       <DialogContent className="max-w-xl">
         <DialogHeader>
-          <DialogTitle>Nuevo archivo de referencia</DialogTitle>
+          <DialogTitle className="font-mono" >Nuevo archivo de referencia</DialogTitle>
           <DialogDescription>
             Sube un documento y escribe instrucciones para su procesamiento. Se guardará en la base y se marcará como
             <em> procesado </em> cuando termine el flujo.
diff --git a/src/routes/_authenticated/asignatura/$asignaturaId.tsx b/src/routes/_authenticated/asignatura/$asignaturaId.tsx
index 0cfe680..e0a9399 100644
--- a/src/routes/_authenticated/asignatura/$asignaturaId.tsx
+++ b/src/routes/_authenticated/asignatura/$asignaturaId.tsx
@@ -1,11 +1,18 @@
 // routes/_authenticated/asignatura/$asignaturaId.tsx
 import { createFileRoute, Link, useRouter } from "@tanstack/react-router"
 import * as Icons from "lucide-react"
-import { useEffect, useMemo, useRef, useState } from "react"
+import { useCallback, useEffect, useMemo, useRef, useState } from "react"
 import { supabase } from "@/auth/supabase"
 import { Button } from "@/components/ui/button"
 import { Badge } from "@/components/ui/badge"
 import { Input } from "@/components/ui/input"
+import {
+  Select,
+  SelectTrigger,
+  SelectContent,
+  SelectItem,
+  SelectValue
+} from "@/components/ui/select"
 import confetti from "canvas-confetti"
 
 import {
@@ -16,6 +23,8 @@ import {
 } from "@/components/ui/dialog"
 import { Textarea } from "@/components/ui/textarea"
 import { Label } from "@/components/ui/label"
+import { Separator } from "@/components/ui/separator"
+import { ScrollArea } from "@/components/ui/scroll-area"
 
 /* ================== Tipos ================== */
 type Asignatura = {
@@ -456,7 +465,7 @@ function EditAsignaturaButton({ asignatura, onUpdate }: {
       <Dialog open={open} onOpenChange={setOpen}>
         <DialogContent className="max-w-xl">
           <DialogHeader>
-            <DialogTitle>Editar asignatura</DialogTitle>
+            <DialogTitle className="font-mono" >Editar asignatura</DialogTitle>
             <DialogDescription>Actualiza campos básicos.</DialogDescription>
           </DialogHeader>
 
@@ -468,7 +477,28 @@ function EditAsignaturaButton({ asignatura, onUpdate }: {
               <Input value={form.clave ?? ""} onChange={e => setForm(s => ({ ...s, clave: e.target.value }))} />
             </Field>
             <Field label="Tipo">
-              <Input value={form.tipo ?? ""} onChange={e => setForm(s => ({ ...s, tipo: e.target.value }))} />
+              <Select value={form.tipo ?? ""} onValueChange={v => setForm(s => ({ ...s, tipo: v }))}>
+                <SelectTrigger className="w-full">
+                  <SelectValue placeholder="Selecciona tipo…" />
+                </SelectTrigger>
+                <SelectContent>
+                  <SelectItem value="Obligatoria">
+                    <span className={typeStyle("Obligatoria").chip}>Obligatoria</span>
+                  </SelectItem>
+                  <SelectItem value="Optativa">
+                    <span className={typeStyle("Optativa").chip}>Optativa</span>
+                  </SelectItem>
+                  <SelectItem value="Taller">
+                    <span className={typeStyle("Taller").chip}>Taller</span>
+                  </SelectItem>
+                  <SelectItem value="Laboratorio">
+                    <span className={typeStyle("Laboratorio").chip}>Laboratorio</span>
+                  </SelectItem>
+                  <SelectItem value="Otro">
+                    <span className={typeStyle("Otro").chip}>Otro</span>
+                  </SelectItem>
+                </SelectContent>
+              </Select>
             </Field>
             <Field label="Semestre">
               <Input value={String(form.semestre ?? "")} onChange={e => setForm(s => ({ ...s, semestre: Number(e.target.value) || null }))} />
@@ -537,7 +567,7 @@ function MejorarAIButton({ asignaturaId, onApply }: {
       <Dialog open={open} onOpenChange={setOpen}>
         <DialogContent className="max-w-xl">
           <DialogHeader>
-            <DialogTitle>Mejorar asignatura con IA</DialogTitle>
+            <DialogTitle className="font-mono" >Mejorar asignatura con IA</DialogTitle>
             <DialogDescription>
               Describe el ajuste que deseas (p. ej. “refuerza contenidos prácticos y añade bibliografía reciente”).
             </DialogDescription>
@@ -589,7 +619,9 @@ function Field({ label, children }: { label: string; children: React.ReactNode }
 }
 
 
-function EditContenidosButton({
+type UnitDraft = { title: string; temas: string[] }
+
+export function EditContenidosButton({
   asignaturaId,
   value,
   onSaved,
@@ -600,137 +632,264 @@ function EditContenidosButton({
 }) {
   const [open, setOpen] = useState(false)
   const [saving, setSaving] = useState(false)
-
-  type UnitDraft = { title: string; temas: string[] }
   const [units, setUnits] = useState<UnitDraft[]>([])
+  const [initialUnits, setInitialUnits] = useState<UnitDraft[]>([])
 
-  // Normaliza el JSON (acepta estructuras flexibles)
-  function normalize(v: any): UnitDraft[] {
+  // --- Normaliza entrada flexible a estructura estable
+  const normalize = useCallback((v: any): UnitDraft[] => {
     try {
       const entries = Object.entries(v ?? {})
         .sort(([a], [b]) => Number(a) - Number(b))
         .map(([key, val]) => {
           const obj = val as any
-          // soporta: { titulo, subtemas:{ "1":"t1" } } | { "1":"t1" } | ["t1","t2"]
-          const title = (typeof obj?.titulo === 'string' && obj.titulo.trim()) ? obj.titulo.trim() : `Unidad ${key}`
+          const title =
+            typeof obj?.titulo === "string" && obj.titulo.trim()
+              ? obj.titulo.trim()
+              : `Unidad ${key}`
           let temas: string[] = []
           if (Array.isArray(obj?.subtemas)) temas = obj.subtemas.map(String)
-          else if (obj?.subtemas && typeof obj.subtemas === 'object') {
-            temas = Object.entries(obj.subtemas).sort(([a], [b]) => Number(a) - Number(b)).map(([, t]) => String(t))
+          else if (obj?.subtemas && typeof obj.subtemas === "object") {
+            temas = Object.entries(obj.subtemas)
+              .sort(([a], [b]) => Number(a) - Number(b))
+              .map(([, t]) => String(t))
           } else if (Array.isArray(obj)) {
             temas = obj.map(String)
-          } else if (obj && typeof obj === 'object') {
-            const nums = Object.entries(obj).filter(([k, v]) => /^\d+$/.test(String(k)) && (typeof v === "string" || typeof v === "number"))
-            if (nums.length) temas = nums.sort(([a], [b]) => Number(a) - Number(b)).map(([, t]) => String(t))
+          } else if (obj && typeof obj === "object") {
+            const nums = Object.entries(obj).filter(
+              ([k, v]) => /^\d+$/.test(String(k)) && (typeof v === "string" || typeof v === "number"),
+            )
+            if (nums.length)
+              temas = nums.sort(([a], [b]) => Number(a) - Number(b)).map(([, t]) => String(t))
           }
           return { title, temas }
         })
-      return entries.length ? entries : [{ title: 'Unidad 1', temas: [] }]
+      return entries.length ? entries : [{ title: "Unidad 1", temas: [] }]
     } catch {
-      return [{ title: 'Unidad 1', temas: [] }]
+      return [{ title: "Unidad 1", temas: [] }]
     }
-  }
+  }, [])
 
-  // Construye un JSON estable para guardar
-  function buildPayload(us: UnitDraft[]) {
-    const out: any = {}
+  // --- Construye payload consistente { "1": { titulo, subtemas:{ "1": "t1" } } }
+  const buildPayload = useCallback((us: UnitDraft[]) => {
+    const out: Record<string, any> = {}
     us.forEach((u, idx) => {
       const k = String(idx + 1)
-      const sub: any = {}
-      u.temas.filter(t => t.trim()).forEach((t, i) => { sub[String(i + 1)] = t.trim() })
-      out[k] = { titulo: u.title.trim() || `Unidad ${k}`, subtemas: sub }
+      const sub: Record<string, string> = {}
+      u.temas
+        .map((t) => t.trim())
+        .filter(Boolean)
+        .forEach((t, i) => {
+          sub[String(i + 1)] = t
+        })
+      out[k] = { titulo: (u.title || "").trim() || `Unidad ${k}`, subtemas: sub }
     })
     return out
+  }, [])
+
+  // --- Limpia UI: recorta espacios, elimina líneas vacías/duplicadas (case-insensitive)
+  const cleanUnits = useCallback((us: UnitDraft[]) => {
+    return us.map((u, idx) => {
+      const seen = new Set<string>()
+      const temas = u.temas
+        .map((t) => t.trim())
+        .filter((t) => {
+          if (!t) return false
+          const key = t.toLowerCase()
+          if (seen.has(key)) return false
+          seen.add(key)
+          return true
+        })
+      return {
+        title: (u.title || "").trim() || `Unidad ${idx + 1}`,
+        temas,
+      }
+    })
+  }, [])
+
+  const openEditor = () => {
+    const base = normalize(value)
+    setUnits(cleanUnits(base))
+    setInitialUnits(cleanUnits(base))
+    setOpen(true)
   }
 
-  function openEditor() {
-    setUnits(normalize(value))
-    setOpen(true)
+  const hasChanges = useMemo(
+    () => JSON.stringify(cleanUnits(units)) !== JSON.stringify(cleanUnits(initialUnits)),
+    [units, initialUnits, cleanUnits],
+  )
+
+  // --- Atajos: Guardar con Ctrl/Cmd + Enter
+  useEffect(() => {
+    if (!open) return
+    const handler = (e: KeyboardEvent) => {
+      const ctrlOrCmd = e.ctrlKey || e.metaKey
+      if (ctrlOrCmd && e.key.toLowerCase() === "enter") {
+        e.preventDefault()
+        void save()
+      }
+    }
+    window.addEventListener("keydown", handler)
+    return () => window.removeEventListener("keydown", handler)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open, units, saving])
+
+  // --- Acciones por unidad
+  const removeUnit = (idx: number) => {
+    if (!confirm("¿Eliminar esta unidad?")) return
+    setUnits((prev) => prev.filter((_, i) => i !== idx))
+  }
+  const moveUnit = (idx: number, dir: -1 | 1) => {
+    setUnits((prev) => {
+      const next = [...prev]
+      const j = idx + dir
+      if (j < 0 || j >= next.length) return prev
+        ;[next[idx], next[j]] = [next[j], next[idx]]
+      return next
+    })
+  }
+  const duplicateUnit = (idx: number) => {
+    setUnits((prev) => {
+      const next = [...prev]
+      next.splice(idx + 1, 0, {
+        title: `${prev[idx].title} (copia)`,
+        temas: [...prev[idx].temas],
+      })
+      return next
+    })
   }
 
   async function save() {
     setSaving(true)
-    const contenidos = buildPayload(units)
+    const cleaned = cleanUnits(units)
+    const contenidos = buildPayload(cleaned)
     const { data, error } = await supabase
-      .from('asignaturas')
+      .from("asignaturas")
       .update({ contenidos })
-      .eq('id', asignaturaId)
+      .eq("id", asignaturaId)
       .select()
       .maybeSingle()
     setSaving(false)
-    if (error) { alert(error.message || 'No se pudo guardar'); return }
+    if (error) {
+      alert(error.message || "No se pudo guardar")
+      return
+    }
+    setInitialUnits(cleaned)
     onSaved((data as any)?.contenidos ?? contenidos)
     setOpen(false)
   }
 
+  const cancel = () => {
+    if (hasChanges && !confirm("Hay cambios sin guardar. ¿Cerrar de todos modos?")) return
+    setOpen(false)
+  }
+
   return (
     <>
       <Button size="sm" variant="outline" onClick={openEditor}>
         <Icons.Pencil className="h-4 w-4 mr-2" /> Editar contenidos
       </Button>
 
-      <Dialog open={open} onOpenChange={setOpen}>
-        <DialogContent className="max-w-3xl">
-          <DialogHeader>
-            <DialogTitle>Editar contenidos</DialogTitle>
-            <DialogDescription>
-              Títulos de unidad y temas (un tema por línea). Se guardará en un formato consistente con <code>titulo</code> y <code>subtemas</code>.
-            </DialogDescription>
-          </DialogHeader>
-
-          <div className="space-y-4 max-h-[60vh] overflow-auto pr-1">
-            {units.map((u, i) => (
-              <div key={i} className="rounded-2xl border p-3">
-                <div className="flex items-center justify-between mb-2">
-                  <div className="font-medium text-sm">Unidad {i + 1}</div>
-                  <div className="flex items-center gap-2">
-                    <Button
-                      size="icon"
-                      variant="ghost"
-                      title="Eliminar unidad"
-                      onClick={() => setUnits(prev => prev.filter((_, idx) => idx !== i))}
-                    >
-                      <Icons.Trash2 className="w-4 h-4" />
-                    </Button>
-                  </div>
-                </div>
-                <div className="grid gap-2">
-                  <div className="space-y-1">
-                    <Label>Título</Label>
-                    <Input
-                      value={u.title}
-                      onChange={(e) => setUnits(prev => prev.map((uu, idx) => idx === i ? { ...uu, title: e.target.value } : uu))}
-                      placeholder={`Unidad ${i + 1}`}
-                    />
-                  </div>
-                  <div className="space-y-1">
-                    <Label>Temas (uno por línea)</Label>
-                    <Textarea
-                      className="min-h-[120px]"
-                      value={u.temas.join('\n')}
-                      onChange={(e) => {
-                        const lines = e.target.value.split('\n')
-                        setUnits(prev => prev.map((uu, idx) => idx === i ? { ...uu, temas: lines } : uu))
-                      }}
-                      placeholder={`Tema 1\nTema 2\n…`}
-                    />
-                  </div>
-                </div>
-              </div>
-            ))}
-            <div className="flex justify-end">
-              <Button
-                variant="secondary"
-                onClick={() => setUnits(prev => [...prev, { title: `Unidad ${prev.length + 1}`, temas: [] }])}
-              >
-                <Icons.Plus className="w-4 h-4 mr-2" /> Agregar unidad
-              </Button>
+      <Dialog open={open} onOpenChange={(o) => (o ? openEditor() : cancel())}>
+        <DialogContent className="max-w-4xl p-0 overflow-hidden">
+          {/* Header sticky */}
+          <div className="sticky top-0 z-10 border-b bg-background/80 backdrop-blur">
+            <DialogHeader className="px-6 pt-5 pb-3">
+              <DialogTitle className="flex items-center gap-2">
+                <Icons.BookOpen className="h-5 w-5" />
+                Editar contenidos
+                {hasChanges && (
+                  <Badge variant="secondary" className="ml-1">Cambios sin guardar</Badge>
+                )}
+              </DialogTitle>
+              <DialogDescription>
+                Títulos de unidad y temas (uno por línea). Se guardará con <code>titulo</code> y <code>subtemas</code>.
+              </DialogDescription>
+            </DialogHeader>
+            <div className="px-6 pb-3 flex items-center justify-between text-xs text-muted-foreground">
+              <span>{units.length} unidad(es)</span>
+              <span className="inline-flex items-center gap-1">
+                <Icons.Keyboard className="h-3 w-3" /> Atajo: <kbd className="px-1 border rounded">Ctrl/⌘</kbd>+<kbd className="px-1 border rounded">Enter</kbd>
+              </span>
             </div>
           </div>
 
-          <DialogFooter>
-            <Button variant="outline" onClick={() => setOpen(false)}>Cancelar</Button>
-            <Button onClick={save} disabled={saving}>{saving ? 'Guardando…' : 'Guardar'}</Button>
+          <ScrollArea className="max-h-[65vh] px-6">
+            <div className="space-y-4 py-4">
+              {units.map((u, i) => (
+                <div key={i} className="rounded-2xl border p-4">
+                  <div className="flex items-center justify-between mb-3 gap-2">
+                    <div className="font-medium text-sm">Unidad {i + 1}</div>
+                    <div className="flex items-center gap-1">
+                      <Button size="icon" variant="ghost" title="Subir" onClick={() => moveUnit(i, -1)} disabled={i === 0}>
+                        <Icons.ArrowUp className="w-4 h-4" />
+                      </Button>
+                      <Button size="icon" variant="ghost" title="Bajar" onClick={() => moveUnit(i, 1)} disabled={i === units.length - 1}>
+                        <Icons.ArrowDown className="w-4 h-4" />
+                      </Button>
+                      <Button size="icon" variant="ghost" title="Duplicar unidad" onClick={() => duplicateUnit(i)}>
+                        <Icons.Copy className="w-4 h-4" />
+                      </Button>
+                      <Separator orientation="vertical" className="mx-1 h-5" />
+                      <Button size="icon" variant="ghost" title="Eliminar unidad" onClick={() => removeUnit(i)}>
+                        <Icons.Trash2 className="w-4 h-4" />
+                      </Button>
+                    </div>
+                  </div>
+
+                  <div className="grid md:grid-cols-2 gap-3">
+                    <div className="space-y-1">
+                      <Label>Título</Label>
+                      <Input
+                        value={u.title}
+                        onChange={(e) =>
+                          setUnits((prev) => prev.map((uu, idx) => (idx === i ? { ...uu, title: e.target.value } : uu)))
+                        }
+                        placeholder={`Unidad ${i + 1}`}
+                      />
+                    </div>
+                    <div className="space-y-1 md:col-span-2">
+                      <div className="flex items-center justify-between">
+                        <Label>Temas (uno por línea)</Label>
+                        <Badge variant="outline">{u.temas.filter((t) => t.trim()).length} tema(s)</Badge>
+                      </div>
+                      <Textarea
+                        className="min-h-[140px]"
+                        value={u.temas.join("\n")}
+                        onChange={(e) => {
+                          const lines = e.target.value.split("\n")
+                          setUnits((prev) => prev.map((uu, idx) => (idx === i ? { ...uu, temas: lines } : uu)))
+                        }}
+                        placeholder={`Tema 1\nTema 2\n…`}
+                      />
+                    </div>
+                  </div>
+                </div>
+              ))}
+
+              <div className="flex justify-end">
+                <Button
+                  variant="secondary"
+                  onClick={() =>
+                    setUnits((prev) => [...prev, { title: `Unidad ${prev.length + 1}`, temas: [] }])
+                  }
+                >
+                  <Icons.Plus className="w-4 h-4 mr-2" /> Agregar unidad
+                </Button>
+              </div>
+            </div>
+          </ScrollArea>
+
+          <DialogFooter className="px-6 pb-5">
+            <Button variant="outline" onClick={cancel}>Cancelar</Button>
+            <Button onClick={save} disabled={saving}>
+              {saving ? (
+                <span className="inline-flex items-center gap-2">
+                  <Icons.Loader2 className="h-4 w-4 animate-spin" /> Guardando…
+                </span>
+              ) : (
+                "Guardar"
+              )}
+            </Button>
           </DialogFooter>
         </DialogContent>
       </Dialog>
@@ -738,6 +897,7 @@ function EditContenidosButton({
   )
 }
 
+
 function EditBibliografiaButton({
   asignaturaId,
   value,
@@ -779,7 +939,7 @@ function EditBibliografiaButton({
       <Dialog open={open} onOpenChange={setOpen}>
         <DialogContent className="max-w-2xl">
           <DialogHeader>
-            <DialogTitle>Editar bibliografía</DialogTitle>
+            <DialogTitle className="font-mono" >Editar bibliografía</DialogTitle>
             <DialogDescription>Escribe una referencia por línea.</DialogDescription>
           </DialogHeader>
           <Textarea
diff --git a/src/routes/_authenticated/asignaturas.tsx b/src/routes/_authenticated/asignaturas.tsx
index 81d4c00..61bf08b 100644
--- a/src/routes/_authenticated/asignaturas.tsx
+++ b/src/routes/_authenticated/asignaturas.tsx
@@ -493,7 +493,7 @@ function RouteComponent() {
       <Dialog open={cloneOpen} onOpenChange={setCloneOpen}>
         <DialogContent className="w-[min(92vw,720px)] sm:max-w-xl">
           <DialogHeader>
-            <DialogTitle>Clonar asignatura</DialogTitle>
+            <DialogTitle className="font-mono" >Clonar asignatura</DialogTitle>
           </DialogHeader>
           {cloneTarget && (
             <div className="grid gap-3">
@@ -584,7 +584,7 @@ function RouteComponent() {
       <Dialog open={bulkOpen} onOpenChange={setBulkOpen}>
         <DialogContent className="w-[min(92vw,840px)]">
           <DialogHeader>
-            <DialogTitle>Carrito de asignaturas ({cart.length})</DialogTitle>
+            <DialogTitle className="font-mono" >Carrito de asignaturas ({cart.length})</DialogTitle>
           </DialogHeader>
 
           {cart.length === 0 ? (
diff --git a/src/routes/_authenticated/asignaturas/$planId.tsx b/src/routes/_authenticated/asignaturas/$planId.tsx
index 4868e93..36a7b62 100644
--- a/src/routes/_authenticated/asignaturas/$planId.tsx
+++ b/src/routes/_authenticated/asignaturas/$planId.tsx
@@ -182,7 +182,7 @@ function Page() {
                 Plan
               </div>
               <DialogHeader className="p-0">
-                <DialogTitle className="truncate text-xl sm:text-2xl">{planNombre}</DialogTitle>
+                <DialogTitle className="font-mono"  className="truncate text-xl sm:text-2xl">{planNombre}</DialogTitle>
               </DialogHeader>
               <div className="mt-2 flex flex-wrap items-center gap-2 text-xs">
                 <KpiChip icon={Icons.BookOpen} label="Asignaturas" value={kpis.total} />
diff --git a/src/routes/_authenticated/facultades.tsx b/src/routes/_authenticated/facultades.tsx
index 371a7ad..e4d488d 100644
--- a/src/routes/_authenticated/facultades.tsx
+++ b/src/routes/_authenticated/facultades.tsx
@@ -199,7 +199,7 @@ function RouteComponent() {
       <Dialog open={createOpen} onOpenChange={setCreateOpen}>
         <DialogContent className="sm:max-w-lg">
           <DialogHeader>
-            <DialogTitle>Nueva facultad</DialogTitle>
+            <DialogTitle className="font-mono" >Nueva facultad</DialogTitle>
           </DialogHeader>
 
           <FormFields form={form} setForm={setForm} />
@@ -223,7 +223,7 @@ function RouteComponent() {
       <Dialog open={editOpen} onOpenChange={(o) => { setEditOpen(o); if (!o) setEditing(null) }}>
         <DialogContent className="sm:max-w-lg">
           <DialogHeader>
-            <DialogTitle>Editar facultad</DialogTitle>
+            <DialogTitle className="font-mono" >Editar facultad</DialogTitle>
           </DialogHeader>
 
           <FormFields form={form} setForm={setForm} />
diff --git a/src/routes/_authenticated/plan/$planId.tsx b/src/routes/_authenticated/plan/$planId.tsx
index 9db7b38..479e6cf 100644
--- a/src/routes/_authenticated/plan/$planId.tsx
+++ b/src/routes/_authenticated/plan/$planId.tsx
@@ -236,7 +236,7 @@ function EditPlanButton({ plan }: { plan: PlanFull }) {
       <Dialog open={open} onOpenChange={setOpen}>
         <DialogContent className="max-w-lg">
           <DialogHeader>
-            <DialogTitle>Editar plan</DialogTitle>
+            <DialogTitle className="font-mono" >Editar plan</DialogTitle>
             <DialogDescription>Actualiza datos básicos.</DialogDescription>
           </DialogHeader>
           <div className="grid gap-3">
@@ -287,7 +287,7 @@ function AdjustAIButton({ plan }: { plan: PlanFull }) {
       <Dialog open={open} onOpenChange={setOpen}>
         <DialogContent className="max-w-lg">
           <DialogHeader>
-            <DialogTitle>Ajustar con IA</DialogTitle>
+            <DialogTitle className="font-mono" >Ajustar con IA</DialogTitle>
             <DialogDescription>Describe cómo quieres modificar el plan actual.</DialogDescription>
           </DialogHeader>
           <Textarea value={prompt} onChange={(e) => setPrompt(e.target.value)} placeholder="Ej.: Enfatiza ciberseguridad y proyectos prácticos…" className="min-h-[120px]" />
@@ -489,7 +489,7 @@ function AddAsignaturaButton({ planId, onAdded }: { planId: string; onAdded?: ()
       <Dialog open={open} onOpenChange={setOpen}>
         <DialogContent className="w-[min(92vw,760px)]">
           <DialogHeader>
-            <DialogTitle>Nueva asignatura</DialogTitle>
+            <DialogTitle className="font-mono" >Nueva asignatura</DialogTitle>
             <DialogDescription>Elige cómo crearla: manual o generada por IA.</DialogDescription>
           </DialogHeader>
 
diff --git a/src/routes/_authenticated/usuarios.tsx b/src/routes/_authenticated/usuarios.tsx
index 74dded5..52e71d7 100644
--- a/src/routes/_authenticated/usuarios.tsx
+++ b/src/routes/_authenticated/usuarios.tsx
@@ -367,7 +367,7 @@ function RouteComponent() {
       {/* Dialog de edición */}
       <Dialog open={!!editing} onOpenChange={(o) => { if (!o) setEditing(null) }}>
         <DialogContent className="w-[min(92vw,720px)] sm:max-w-xl md:max-w-2xl">
-          <DialogHeader><DialogTitle>Editar usuario</DialogTitle></DialogHeader>
+          <DialogHeader><DialogTitle className="font-mono" >Editar usuario</DialogTitle></DialogHeader>
           <div className="grid gap-4 md:grid-cols-2">
             <div className="space-y-1"><Label>Nombre</Label><Input value={form.nombre ?? ""} onChange={(e) => setForm((s) => ({ ...s, nombre: e.target.value }))} /></div>
             <div className="space-y-1"><Label>Apellidos</Label><Input value={form.apellidos ?? ""} onChange={(e) => setForm((s) => ({ ...s, apellidos: e.target.value }))} /></div>
@@ -452,7 +452,7 @@ function RouteComponent() {
       {/* Modal: Nuevo usuario */}
       <Dialog open={createOpen} onOpenChange={setCreateOpen}>
         <DialogContent className="w-[min(92vw,720px)] sm:max-w-xl md:max-w-2xl">
-          <DialogHeader><DialogTitle>Nuevo usuario</DialogTitle></DialogHeader>
+          <DialogHeader><DialogTitle className="font-mono" >Nuevo usuario</DialogTitle></DialogHeader>
 
           <div className="grid gap-4 md:grid-cols-2">
             <div className="space-y-1 md:col-span-2">