diff --git a/frontend/src/components/editor/SubscaleModal.jsx b/frontend/src/components/editor/SubscaleModal.jsx
index 70bb4ce..0980b37 100644
--- a/frontend/src/components/editor/SubscaleModal.jsx
+++ b/frontend/src/components/editor/SubscaleModal.jsx
@@ -4,11 +4,20 @@ import BlankCardsCounter from '../BlankCardsCounter';
 export default function SubscaleModal({ onClose, onSave, targetInfo }) {
 
   const [cardsCount, setCardsCount] = useState(targetInfo?.initialData?.cardsCount || 2);
-  const [blankCards, setBlankCards] = useState(targetInfo?.initialData?.blankCards || [0]);
+  
+  const [blankCards, setBlankCards] = useState(() => {
+    const initialBlanks = targetInfo?.initialData?.blankCards || [0];
+    return initialBlanks.map(b => {
+      if (Array.isArray(b)) {
+        return { min: b[0], max: b[1], isRange: true };
+      }
+      return { min: b, max: b, isRange: false };
+    });
+  });
 
   const handleAddCard = () => {
     setCardsCount(prev => prev + 1);
-    setBlankCards([...blankCards, 0]);
+    setBlankCards([...blankCards, { min: 0, max: 0, isRange: false }]);
   };
   
   const handleRemoveCard = () => {
@@ -17,16 +26,46 @@ export default function SubscaleModal({ onClose, onSave, targetInfo }) {
     setBlankCards(blankCards.slice(0, -1));
   };
 
-  const handleBlankCardChange = (index, delta) => {
+  const handleExactChange = (index, delta) => {
     const newBlanks = [...blankCards];
-    if (newBlanks[index] + delta >= 0) {
-      newBlanks[index] += delta;
+    const newVal = newBlanks[index].min + delta;
+    if (newVal >= 0) {
+      newBlanks[index].min = newVal;
+      newBlanks[index].max = newVal;
       setBlankCards(newBlanks);
     }
   };
 
+  const handleMinChange = (index, delta) => {
+    const newBlanks = [...blankCards];
+    const newVal = newBlanks[index].min + delta;
+    if (newVal >= 0 && newVal <= newBlanks[index].max) {
+      newBlanks[index].min = newVal;
+      setBlankCards(newBlanks);
+    }
+  };
+
+  const handleMaxChange = (index, delta) => {
+    const newBlanks = [...blankCards];
+    const newVal = newBlanks[index].max + delta;
+    if (newVal >= newBlanks[index].min) {
+      newBlanks[index].max = newVal;
+      setBlankCards(newBlanks);
+    }
+  };
+
+  const toggleRangeMode = (index) => {
+    const newBlanks = [...blankCards];
+    newBlanks[index].isRange = !newBlanks[index].isRange;
+    if (!newBlanks[index].isRange) {
+      newBlanks[index].max = newBlanks[index].min;
+    }
+    setBlankCards(newBlanks);
+  };
+
   const handleSave = () => {
-    onSave(targetInfo.term, targetInfo.side, { cardsCount, blankCards });
+    const payloadBlanks = blankCards.map(b => b.isRange ? [b.min, b.max] : b.min);
+    onSave(targetInfo.term, targetInfo.side, { cardsCount, blankCards: payloadBlanks });
   };
 
   const handleDelete = () => {
@@ -35,7 +74,7 @@ export default function SubscaleModal({ onClose, onSave, targetInfo }) {
 
   return (
     <div className="fixed inset-0 z-[100] flex items-center justify-center bg-slate-900/40 backdrop-blur-sm animate-fade-in">
-      <div className="bg-white w-full max-w-5xl p-8 rounded-3xl shadow-2xl mx-4 flex flex-col">
+      <div className="bg-white w-full max-w-6xl p-8 rounded-3xl shadow-2xl mx-4 flex flex-col">
         
         <div className="flex justify-between items-center mb-6 border-b pb-4">
           <div>
@@ -47,34 +86,83 @@ export default function SubscaleModal({ onClose, onSave, targetInfo }) {
           <button onClick={onClose} className="w-10 h-10 bg-slate-100 hover:bg-slate-200 text-slate-600 rounded-full font-bold transition-colors">✕</button>
         </div>
 
-        {/* Tablero */}
+        {/* Tablero de Cartas */}
         <div className="w-full py-10 overflow-x-auto flex justify-start px-4">
           <div className="flex flex-row items-start min-w-max relative">
+            
             {Array.from({ length: cardsCount }).map((_, index) => (
               <React.Fragment key={index}>
+                {/* CARTA DE REFERENCIA  */}
                 <div className="flex flex-col items-center mx-2 my-2 relative z-20">
                   <div className="relative w-32 h-40 bg-slate-50 border-2 border-slate-300 rounded-2xl shadow-sm flex flex-col items-center justify-center group">
                     {cardsCount > 2 && index === cardsCount - 1 && (
-                      <button onClick={handleRemoveCard} 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 transition-colors z-10 shadow-sm opacity-0 group-hover:opacity-100">×</button>
+                      <button onClick={handleRemoveCard} 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 transition-colors z-10 shadow-sm opacity-0 group-hover:opacity-100">✕</button>
                     )}
                     <span className="text-4xl font-black text-slate-200">{index + 1}</span>
                   </div>
                 </div>
+
+                {/* HUECO ENTRE CARTAS: Representación y Controles */}
                 {index < cardsCount - 1 && (
-                  <BlankCardsCounter index={index} blankCardsCount={blankCards[index]} handleBlankCardChange={handleBlankCardChange} />
+                  <div className="flex flex-col items-center justify-start mx-4 mt-2 max-w-[180px]">
+                    
+                    {/* Representación visual de las cartas blancas Sólidas / Fantasmas */}
+                    <div className="flex flex-wrap justify-center gap-1 min-h-[48px] mb-4">
+                      {Array.from({ length: blankCards[index].min }).map((_, i) => (
+                        <div key={`solid-${i}`} className="w-7 h-10 bg-white border-2 border-slate-300 rounded shadow-sm" />
+                      ))}
+                      {blankCards[index].isRange && Array.from({ length: blankCards[index].max - blankCards[index].min }).map((_, i) => (
+                        <div key={`ghost-${i}`} className="w-7 h-10 bg-blue-50 border-2 border-dashed border-blue-400 rounded opacity-60 flex items-center justify-center">
+                          <span className="text-blue-500 text-[10px] font-bold">?</span>
+                        </div>
+                      ))}
+                    </div>
+
+                    {/* Controles de números */}
+                    {blankCards[index].isRange ? (
+                      // MODO RANGO
+                      <div className="flex gap-4 bg-blue-50/50 p-3 rounded-xl border border-blue-100 shadow-inner">
+                        <div className="flex flex-col items-center">
+                          <span className="text-xs font-bold text-slate-500 mb-1">MÍN</span>
+                          <BlankCardsCounter index={index} blankCardsCount={blankCards[index].min} handleBlankCardChange={(idx, delta) => handleMinChange(idx, delta)} />
+                        </div>
+                        <div className="flex flex-col items-center">
+                          <span className="text-xs font-bold text-slate-500 mb-1">MÁX</span>
+                          <BlankCardsCounter index={index} blankCardsCount={blankCards[index].max} handleBlankCardChange={(idx, delta) => handleMaxChange(idx, delta)} />
+                        </div>
+                      </div>
+                    ) : (
+                      // MODO EXACTO
+                      <div className="flex flex-col items-center mt-2">
+                         <span className="text-xs font-bold text-slate-500 mb-1">CARTAS</span>
+                         <BlankCardsCounter index={index} blankCardsCount={blankCards[index].min} handleBlankCardChange={(idx, delta) => handleExactChange(idx, delta)} />
+                      </div>
+                    )}
+
+                    {/* Botón Toggle */}
+                    <button
+                      onClick={() => toggleRangeMode(index)}
+                      className="mt-3 text-xs font-semibold text-blue-600 hover:text-blue-800 hover:underline transition-colors text-center"
+                    >
+                      {blankCards[index].isRange ? "Conozco la distancia exacta" : "¿Dudas? Define un rango"}
+                    </button>
+
+                  </div>
                 )}
               </React.Fragment>
             ))}
             
+            {/* Botón Añadir Carta */}
             <div className="mx-2 my-2 h-40 flex items-center">
-               <button onClick={handleAddCard} className="w-32 h-40 border-4 border-dashed border-slate-300 rounded-2xl flex flex-col items-center justify-center text-slate-400 font-bold hover:bg-blue-50 hover:border-blue-400 hover:text-blue-500 transition-colors">
-                  <span className="text-3xl">+</span>
+               <button onClick={handleAddCard} className="w-32 h-40 border-4 border-dashed border-slate-300 rounded-2xl flex flex-col items-center justify-center text-slate-400 font-bold hover:bg-blue-50 hover:border-blue-400 hover:text-blue-500 transition-colors group">
+                  <span className="text-3xl group-hover:scale-110 transition-transform">+</span>
                </button>
             </div>
+
           </div>
         </div>
 
-        {/* Botones */}
+        {/* Botones de Acción */}
         <div className="mt-8 flex justify-between items-center border-t pt-6">
           <button onClick={handleDelete} className="px-6 py-3 rounded-xl font-bold text-red-500 hover:bg-red-50 transition-colors">
             Borrar Subescala