diff --git a/frontend/src/components/CardEditor.jsx b/frontend/src/components/CardEditor.jsx
index 77c0c73..a8fdcf7 100644
--- a/frontend/src/components/CardEditor.jsx
+++ b/frontend/src/components/CardEditor.jsx
@@ -1,33 +1,44 @@
-export default function CardEditor({ index, level, handleLevelChange, handleRemoveLevel, totalLevels }) {
+export default function CardEditor({ index, level, handleLevelChange, handleRemoveLevel, totalLevels, error }) {
   return (
-    <div className="relative w-72 h-44 bg-white border-2 border-slate-200 rounded-xl shadow-[0_8px_30px_rgb(0,0,0,0.08)] flex flex-col items-center justify-center transition-transform hover:-translate-y-1 hover:shadow-[0_12px_40px_rgb(0,0,0,0.12)] group">
+    <div className="flex flex-col items-center">
+      <div className={`relative w-72 h-44 bg-white border-2 rounded-xl shadow-[0_8px_30px_rgb(0,0,0,0.08)] flex flex-col items-center justify-center transition-transform hover:-translate-y-1 hover:shadow-[0_12px_40px_rgb(0,0,0,0.12)] group ${
+        error ? 'border-red-400 shadow-red-100' : 'border-slate-200'
+      }`}>
+        {/* Botón para eliminar */}
+        {totalLevels > 2 && (
+          <button
+            onClick={() => handleRemoveLevel(index)}
+            className="absolute -top-3 -right-3 w-8 h-8 bg-white text-slate-400 rounded-full border border-slate-200 flex items-center justify-center font-bold hover:bg-red-500 hover:text-white hover:border-red-500 transition-colors z-10 opacity-0 group-hover:opacity-100 shadow-sm"
+            title="Eliminar carta"
+          >
+            ×
+          </button>
+        )}
+
+        {/* Detalles tipo naipe */}
+        <span className="absolute top-4 left-4 text-sm font-black text-slate-300">{index + 1}</span>
+        <span className="absolute bottom-4 right-4 text-sm font-black text-slate-300 rotate-180">{index + 1}</span>
+
+        <input
+          type="text"
+          placeholder="Escribe aquí..."
+          value={level}
+          onChange={(e) => handleLevelChange(index, e.target.value)}
+          className={`w-4/5 text-center text-2xl font-bold text-slate-700 bg-transparent border-b-2 border-dashed outline-none pb-1 ${
+            error ? 'border-red-300 focus:border-red-500 placeholder:text-red-200' : 'border-slate-300 focus:border-blue-500'
+          }`}
+        />
+      </div>
+      
+      {/* Mensaje de error */}
+      <div className="h-6 mt-2">
+        {error && (
+          <p className="text-red-500 text-sm font-semibold animate-pulse">
+            Escribe una etiqueta
+          </p>
+        )}
+      </div>
       
-      {/* Botón Eliminar */}
-      {totalLevels > 2 && (
-        <button
-          onClick={() => handleRemoveLevel(index)}
-          className="absolute -top-3 -right-3 w-8 h-8 bg-white text-slate-400 rounded-full border border-slate-200 flex items-center justify-center font-bold hover:bg-red-500 hover:text-white hover:border-red-500 transition-colors z-10 opacity-0 group-hover:opacity-100 shadow-sm"
-          title="Eliminar carta"
-        >
-          ×
-        </button>
-      )}
-
-      {/* Detalles tipo naipe */}
-      <span className="absolute top-4 left-4 text-sm font-black text-slate-300">
-        {index + 1}
-      </span>
-      <span className="absolute bottom-4 right-4 text-sm font-black text-slate-300 rotate-180">
-        {index + 1}
-      </span>
-
-      <input
-        type="text"
-        placeholder="Escribe aquí..."
-        value={level}
-        onChange={(e) => handleLevelChange(index, e.target.value)}
-        className="w-4/5 text-center text-2xl font-bold text-slate-700 bg-transparent border-b-2 border-dashed border-slate-300 focus:border-blue-500 outline-none pb-1"
-      />
     </div>
   );
 }
\ No newline at end of file
diff --git a/frontend/src/components/CriterionInput.jsx b/frontend/src/components/CriterionInput.jsx
index 300c2de..bc15f39 100644
--- a/frontend/src/components/CriterionInput.jsx
+++ b/frontend/src/components/CriterionInput.jsx
@@ -1,4 +1,4 @@
-export default function CriterionInput({ criterionName, setCriterionName }) {
+export default function CriterionInput({ criterionName, setCriterionName, error }) {
   return (
     <div className="w-full max-w-2xl bg-white p-6 rounded-2xl shadow-sm border border-slate-200 mb-12">
       <label className="block text-sm font-bold text-slate-400 uppercase tracking-widest mb-2 text-center">
@@ -9,8 +9,19 @@ export default function CriterionInput({ criterionName, setCriterionName }) {
         placeholder="Ej. Calidad del aceite..."
         value={criterionName}
         onChange={(e) => setCriterionName(e.target.value)}
-        className="w-full text-3xl font-bold p-2 text-center text-slate-700 border-b-2 border-transparent hover:border-slate-200 focus:border-blue-500 outline-none transition-colors"
+        className={`w-full text-3xl font-bold p-2 text-center text-slate-700 border-b-2 outline-none transition-colors ${
+          error 
+            ? 'border-red-400 focus:border-red-500' 
+            : 'border-transparent hover:border-slate-200 focus:border-blue-500'
+        }`}
       />
+      
+      {error && (
+        <p className="text-red-500 text-sm font-semibold text-center mt-2 animate-pulse">
+          El nombre del criterio es obligatorio
+        </p>
+      )}
+      
     </div>
   );
 }
\ No newline at end of file
diff --git a/frontend/src/components/layout/MainLayout.jsx b/frontend/src/components/layout/MainLayout.jsx
index bd75055..73cbad7 100644
--- a/frontend/src/components/layout/MainLayout.jsx
+++ b/frontend/src/components/layout/MainLayout.jsx
@@ -22,7 +22,7 @@ export const MainLayout = () => {
                 }`
                 }
             >
-                DoC Clásico
+                DoC Básico
             </NavLink>
             
             <NavLink
diff --git a/frontend/src/pages/BasicMode.jsx b/frontend/src/pages/BasicMode.jsx
index d5c7976..f162493 100644
--- a/frontend/src/pages/BasicMode.jsx
+++ b/frontend/src/pages/BasicMode.jsx
@@ -13,24 +13,38 @@ export default function BasicMode() {
 
     const [isLoading, setIsLoading] = useState(false);
     const [result, setResult] = useState(null);
+    
+    const [errors, setErrors] = useState({ criterion: false, levels: [] });
 
     const handleCalculate = async () => {
+
+        let hasError = false;
+        const newErrors = { criterion: false, levels: Array(levels.length).fill(false) };
+
+        if (!criterionName.trim()) {
+            newErrors.criterion = true;
+            hasError = true;
+        }
+
+        levels.forEach((level, idx) => {
+            if (!level.trim()) {
+                newErrors.levels[idx] = true;
+                hasError = true;
+            }
+        });
+
+        setErrors(newErrors);
+        
+        if (hasError) return;
+
         setIsLoading(true);
         setResult(null);
 
-        const firstIndex = "0";
-        const lastIndex = (levels.length - 1).toString();
-        
-        const currentReferences = {
-            [firstIndex]: 0, 
-            [lastIndex]: 1
-        };
-
         const payload = {
-            criterion_name: criterionName || "Criterio sin nombre",
-            levels: levels,
+            criterion_name: criterionName.trim(),
+            levels: levels.map(l => l.trim()),
             blank_cards: blankCards,
-            references: currentReferences
+            references: { "0": 0, [(levels.length - 1).toString()]: 1 }
         };
 
         try {
@@ -43,15 +57,27 @@ export default function BasicMode() {
         }
     };
 
+    const handleCriterionChange = (val) => {
+        setCriterionName(val);
+        if (errors.criterion) setErrors({ ...errors, criterion: false });
+    };
+
     const handleLevelChange = (index, newValue) => {
         const newLevels = [...levels];
         newLevels[index] = newValue;
         setLevels(newLevels);
+
+        if (errors.levels[index]) {
+            const newErrLevels = [...errors.levels];
+            newErrLevels[index] = false;
+            setErrors({ ...errors, levels: newErrLevels });
+        }
     };
 
     const handleAddLevel = () => {
         setLevels([...levels, '']);
         setBlankCards([...blankCards, 0]); 
+        setErrors({ ...errors, levels: [...errors.levels, false] });
     };
 
     const handleRemoveLevel = (indexToRemove) => {
@@ -59,8 +85,12 @@ export default function BasicMode() {
         const newLevels = levels.filter((_, index) => index !== indexToRemove);
         const blankIndexToRemove = indexToRemove === 0 ? 0 : indexToRemove - 1;
         const newBlankCards = blankCards.filter((_, index) => index !== blankIndexToRemove);
+        
+        const newErrLevels = errors.levels.filter((_, index) => index !== indexToRemove);
+
         setLevels(newLevels);
         setBlankCards(newBlankCards);
+        setErrors({ ...errors, levels: newErrLevels });
     };
 
     const handleBlankCardChange = (index, delta) => {
@@ -74,10 +104,11 @@ export default function BasicMode() {
 
   return (
     <div className="w-full flex flex-col items-center">
-        
+      
         <CriterionInput 
             criterionName={criterionName} 
-            setCriterionName={setCriterionName} 
+            setCriterionName={handleCriterionChange} 
+            error={errors.criterion}
         />
 
         <div className="w-full max-w-lg flex flex-col items-center">
@@ -90,6 +121,7 @@ export default function BasicMode() {
                     handleLevelChange={handleLevelChange} 
                     handleRemoveLevel={handleRemoveLevel} 
                     totalLevels={levels.length} 
+                    error={errors.levels[index]}
                 />
 
                 {index < levels.length - 1 && (
@@ -107,18 +139,18 @@ export default function BasicMode() {
 
         <div className="w-full max-w-lg mt-12 pt-8 border-t-2 border-slate-200 flex flex-col items-center">
             <button
-                onClick={handleCalculate}
-                disabled={isLoading}
-                className={`w-full py-4 text-white text-xl font-bold rounded-xl shadow-lg transition-all active:scale-[0.98] ${
-                    isLoading ? 'bg-slate-400 cursor-not-allowed' : 'bg-gradient-to-r from-blue-600 to-indigo-600 hover:from-blue-700 hover:to-indigo-700 hover:shadow-xl'
+            onClick={handleCalculate}
+            disabled={isLoading}
+            className={`w-full py-4 text-white text-xl font-bold rounded-xl shadow-lg transition-all active:scale-[0.98] ${
+                isLoading ? 'bg-slate-400 cursor-not-allowed' : 'bg-gradient-to-r from-blue-600 to-indigo-600 hover:from-blue-700 hover:to-indigo-700 hover:shadow-xl'
             }`}
             >
-                {isLoading ? 'Calculando...' : 'Calcular Valores DoC'}
+            {isLoading ? 'Calculando...' : 'Calcular Valores DoC'}
             </button>
         </div>
 
         <ValueFunctionChart result={result} />
 
     </div>
-);
+  );
 }
\ No newline at end of file