diff --git a/src/app/admin/page.tsx b/src/app/admin/page.tsx
index 23d3ea2..acf93d7 100644
--- a/src/app/admin/page.tsx
+++ b/src/app/admin/page.tsx
@@ -214,9 +214,6 @@ export default function AdminPage() {
                         </div>
                       </div>
                       
-                      <div className="text-sm text-gray-500">
-                        <span className="font-medium">Paliers de dépenses:</span> {campaign.spending_tiers}
-                      </div>
                       
                       {campaign.status === 'deposit' && (
                         <div className="mt-4 p-3 bg-blue-50 rounded-lg border border-blue-200">
diff --git a/src/app/campaigns/[id]/vote/[participantId]/page.tsx b/src/app/campaigns/[id]/vote/[participantId]/page.tsx
index 9340f3b..c7903ae 100644
--- a/src/app/campaigns/[id]/vote/[participantId]/page.tsx
+++ b/src/app/campaigns/[id]/vote/[participantId]/page.tsx
@@ -21,6 +21,9 @@ export default function PublicVotePage() {
   const [saving, setSaving] = useState(false);
   const [error, setError] = useState('');
   const [success, setSuccess] = useState(false);
+  
+  // Votes temporaires stockés localement
+  const [localVotes, setLocalVotes] = useState<Record<string, number>>({});
   const [totalVoted, setTotalVoted] = useState(0);
 
   useEffect(() => {
@@ -29,6 +32,12 @@ export default function PublicVotePage() {
     }
   }, [campaignId, participantId]);
 
+  // Calculer le total voté à partir des votes locaux
+  useEffect(() => {
+    const total = Object.values(localVotes).reduce((sum, amount) => sum + amount, 0);
+    setTotalVoted(total);
+  }, [localVotes]);
+
   const loadData = async () => {
     try {
       setLoading(true);
@@ -70,9 +79,12 @@ export default function PublicVotePage() {
       
       setPropositions(propositionsWithVotes);
       
-      // Calculer le total voté
-      const total = votes.reduce((sum, vote) => sum + vote.amount, 0);
-      setTotalVoted(total);
+      // Initialiser les votes locaux avec les votes existants
+      const initialVotes: Record<string, number> = {};
+      votes.forEach(vote => {
+        initialVotes[vote.proposition_id] = vote.amount;
+      });
+      setLocalVotes(initialVotes);
       
     } catch (error) {
       console.error('Erreur lors du chargement des données:', error);
@@ -82,37 +94,18 @@ export default function PublicVotePage() {
     }
   };
 
-  const handleVoteChange = async (propositionId: string, amount: number) => {
-    try {
-      const existingVote = propositions.find(p => p.id === propositionId)?.vote;
-      
-      if (amount === 0) {
-        // Si on sélectionne "Aucun vote", on supprime le vote existant s'il y en a un
-        if (existingVote) {
-          await voteService.delete(existingVote.id);
-        }
-      } else {
-        // Sinon on crée ou met à jour le vote
-        if (existingVote) {
-          // Mettre à jour le vote existant
-          await voteService.update(existingVote.id, { amount });
-        } else {
-          // Créer un nouveau vote
-          await voteService.create({
-            campaign_id: campaignId,
-            participant_id: participantId,
-            proposition_id: propositionId,
-            amount
-          });
-        }
-      }
-      
-      // Recharger les données
-      await loadData();
-      
-    } catch (error) {
-      console.error('Erreur lors du vote:', error);
-      setError('Erreur lors de l\'enregistrement du vote');
+  const handleVoteChange = (propositionId: string, amount: number) => {
+    if (amount === 0) {
+      // Si on sélectionne "Aucun vote", on supprime le vote local
+      const newLocalVotes = { ...localVotes };
+      delete newLocalVotes[propositionId];
+      setLocalVotes(newLocalVotes);
+    } else {
+      // Sinon on met à jour le vote local
+      setLocalVotes(prev => ({
+        ...prev,
+        [propositionId]: amount
+      }));
     }
   };
 
@@ -126,7 +119,24 @@ export default function PublicVotePage() {
     setError('');
     
     try {
-      // Les votes sont déjà sauvegardés, on affiche juste le succès
+      // Supprimer tous les votes existants pour ce participant
+      const existingVotes = await voteService.getByParticipant(campaignId, participantId);
+      for (const vote of existingVotes) {
+        await voteService.delete(vote.id);
+      }
+      
+      // Créer les nouveaux votes
+      for (const [propositionId, amount] of Object.entries(localVotes)) {
+        if (amount > 0) {
+          await voteService.create({
+            campaign_id: campaignId,
+            participant_id: participantId,
+            proposition_id: propositionId,
+            amount
+          });
+        }
+      }
+      
       setSuccess(true);
     } catch (error) {
       console.error('Erreur lors de la validation:', error);
@@ -217,7 +227,7 @@ export default function PublicVotePage() {
 
   return (
     <div className="min-h-screen bg-gray-50">
-      {/* Header fixe avec le total */}
+      {/* Header fixe avec le total et le bouton de validation */}
       <div className="sticky top-0 z-40 bg-white shadow-sm border-b border-gray-200">
         <div className="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8 py-4">
           <div className="flex items-center justify-between">
@@ -239,17 +249,31 @@ export default function PublicVotePage() {
               </div>
             </div>
             
-            <div className="text-right">
-              <div className="text-2xl font-bold text-gray-900">
-                {totalVoted}€ / {campaign?.budget_per_user}€
-              </div>
-              <div className={`text-sm font-medium ${
-                voteStatus.status === 'success' ? 'text-green-600' :
-                voteStatus.status === 'warning' ? 'text-yellow-600' :
-                'text-red-600'
-              }`}>
-                {voteStatus.message}
+            <div className="flex items-center space-x-4">
+              <div className="text-right">
+                <div className="text-2xl font-bold text-gray-900">
+                  {totalVoted}€ / {campaign?.budget_per_user}€
+                </div>
+                <div className={`text-sm font-medium ${
+                  voteStatus.status === 'success' ? 'text-green-600' :
+                  voteStatus.status === 'warning' ? 'text-yellow-600' :
+                  'text-red-600'
+                }`}>
+                  {voteStatus.message}
+                </div>
               </div>
+              
+              <button
+                onClick={handleSubmit}
+                disabled={saving || totalVoted !== campaign?.budget_per_user}
+                className={`px-6 py-3 text-sm font-medium rounded-lg transition-all duration-200 ${
+                  totalVoted === campaign?.budget_per_user
+                    ? 'bg-green-600 text-white hover:bg-green-700 shadow-lg'
+                    : 'bg-gray-300 text-gray-500 cursor-not-allowed'
+                }`}
+              >
+                {saving ? 'Enregistrement...' : 'Valider mon vote'}
+              </button>
             </div>
           </div>
         </div>
@@ -258,20 +282,11 @@ export default function PublicVotePage() {
       <div className="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
         {/* Informations de la campagne */}
         <div className="bg-white rounded-lg shadow-sm border border-gray-200 p-6 mb-8">
-          <h2 className="text-lg font-medium text-gray-900 mb-4">Informations sur la campagne</h2>
-          <div className="grid grid-cols-1 md:grid-cols-3 gap-6">
+          <div className="grid grid-cols-1 md:grid-cols-1 gap-6">
             <div>
               <h3 className="text-sm font-medium text-gray-500">Description</h3>
               <p className="mt-1 text-sm text-gray-900">{campaign?.description}</p>
             </div>
-            <div>
-              <h3 className="text-sm font-medium text-gray-500">Budget par participant</h3>
-              <p className="mt-1 text-sm text-gray-900">{campaign?.budget_per_user}€</p>
-            </div>
-            <div>
-              <h3 className="text-sm font-medium text-gray-500">Paliers de dépenses</h3>
-              <p className="mt-1 text-sm text-gray-900">{campaign?.spending_tiers}</p>
-            </div>
           </div>
         </div>
 
@@ -297,40 +312,51 @@ export default function PublicVotePage() {
                       <p className="text-sm text-gray-600 mb-4">
                         {proposition.description}
                       </p>
-                      <div className="text-xs text-gray-500">
-                        <span className="font-medium">Auteur :</span> {proposition.author_first_name} {proposition.author_last_name}
-                      </div>
                     </div>
                   </div>
                   
                   <div className="mt-6">
                     <label className="block text-sm font-medium text-gray-700 mb-3">
-                      Votre vote pour cette proposition
+                      Pour cette proposition, vous investissez :
                     </label>
-                    <div className="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 gap-3">
-                      {spendingTiers.map((tier) => (
-                        <button
-                          key={tier}
-                          onClick={() => handleVoteChange(proposition.id, tier)}
-                          className={`px-4 py-3 text-sm font-medium rounded-lg border-2 transition-all duration-200 ${
-                            proposition.vote?.amount === tier
-                              ? 'border-indigo-500 bg-indigo-50 text-indigo-700'
-                              : 'border-gray-200 bg-white text-gray-700 hover:border-gray-300 hover:bg-gray-50'
-                          }`}
-                        >
-                          {tier}€
-                        </button>
-                      ))}
-                      <button
-                        onClick={() => handleVoteChange(proposition.id, 0)}
-                        className={`px-4 py-3 text-sm font-medium rounded-lg border-2 transition-all duration-200 ${
-                          !proposition.vote
-                            ? 'border-gray-400 bg-gray-100 text-gray-600'
-                            : 'border-gray-200 bg-white text-gray-700 hover:border-gray-300 hover:bg-gray-50'
-                        }`}
-                      >
-                        Aucun vote
-                      </button>
+                    <div className="space-y-4">
+                      {/* Slider */}
+                      <div className="relative">
+                        <input
+                          type="range"
+                          min="0"
+                          max={spendingTiers.length}
+                          step="1"
+                          value={localVotes[proposition.id] ? spendingTiers.indexOf(localVotes[proposition.id]) + 1 : 0}
+                          onChange={(e) => {
+                            const index = parseInt(e.target.value);
+                            const amount = index === 0 ? 0 : spendingTiers[index - 1];
+                            handleVoteChange(proposition.id, amount);
+                          }}
+                          className="w-full h-2 bg-gray-200 rounded-lg appearance-none cursor-pointer slider"
+                        />
+                        
+                        {/* Marqueurs des paliers */}
+                        <div className="flex justify-between mt-3 px-2">
+                          <div className="text-center">
+                            <div className="w-3 h-3 bg-gray-400 rounded-full mx-auto mb-2"></div>
+                            <span className="text-xs text-gray-600 font-medium">0€</span>
+                          </div>
+                          {spendingTiers.map((tier, index) => (
+                            <div key={tier} className="text-center">
+                              <div className="w-3 h-3 bg-indigo-500 rounded-full mx-auto mb-2"></div>
+                              <span className="text-xs text-gray-600 font-medium">{tier}€</span>
+                            </div>
+                          ))}
+                        </div>
+                      </div>
+                      
+                      {/* Valeur sélectionnée */}
+                      <div className="text-center">
+                        <span className="inline-flex items-center px-3 py-1 rounded-full text-sm font-medium bg-indigo-100 text-indigo-800">
+                          Vote sélectionné : {localVotes[proposition.id] || 0}€
+                        </span>
+                      </div>
                     </div>
                   </div>
                 </div>
@@ -339,23 +365,6 @@ export default function PublicVotePage() {
           </div>
         )}
 
-        {/* Bouton de validation */}
-        {propositions.length > 0 && (
-          <div className="mt-8 flex justify-center">
-            <button
-              onClick={handleSubmit}
-              disabled={saving || totalVoted !== campaign?.budget_per_user}
-              className={`px-8 py-4 text-lg font-medium rounded-lg transition-all duration-200 ${
-                totalVoted === campaign?.budget_per_user
-                  ? 'bg-green-600 text-white hover:bg-green-700 shadow-lg'
-                  : 'bg-gray-300 text-gray-500 cursor-not-allowed'
-              }`}
-            >
-              {saving ? 'Enregistrement...' : 'Valider mon vote'}
-            </button>
-          </div>
-        )}
-
         {error && (
           <div className="mt-6 bg-red-50 border border-red-200 text-red-700 px-4 py-3 rounded-md">
             {error}
diff --git a/src/app/globals.css b/src/app/globals.css
index a2dc41e..e8bacd3 100644
--- a/src/app/globals.css
+++ b/src/app/globals.css
@@ -24,3 +24,68 @@ body {
   color: var(--foreground);
   font-family: Arial, Helvetica, sans-serif;
 }
+
+/* Styles personnalisés pour le slider */
+.slider {
+  -webkit-appearance: none;
+  appearance: none;
+  width: 100%;
+  height: 8px;
+  border-radius: 4px;
+  background: #e5e7eb;
+  outline: none;
+  cursor: pointer;
+}
+
+.slider::-webkit-slider-track {
+  width: 100%;
+  height: 8px;
+  border-radius: 4px;
+  background: #e5e7eb;
+  border: 1px solid #d1d5db;
+}
+
+.slider::-webkit-slider-thumb {
+  -webkit-appearance: none;
+  appearance: none;
+  width: 24px;
+  height: 24px;
+  border-radius: 50%;
+  background: #4f46e5;
+  cursor: pointer;
+  border: 2px solid #ffffff;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+  transition: all 0.2s ease;
+}
+
+.slider::-webkit-slider-thumb:hover {
+  background: #3730a3;
+  transform: scale(1.1);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+}
+
+.slider::-moz-range-track {
+  width: 100%;
+  height: 8px;
+  border-radius: 4px;
+  background: #e5e7eb;
+  border: 1px solid #d1d5db;
+  outline: none;
+}
+
+.slider::-moz-range-thumb {
+  width: 24px;
+  height: 24px;
+  border-radius: 50%;
+  background: #4f46e5;
+  cursor: pointer;
+  border: 2px solid #ffffff;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+  transition: all 0.2s ease;
+}
+
+.slider::-moz-range-thumb:hover {
+  background: #3730a3;
+  transform: scale(1.1);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+}