diff --git a/public/userarea/matrici.php b/public/userarea/matrici.php
index 54837f69..89f0f0d1 100644
--- a/public/userarea/matrici.php
+++ b/public/userarea/matrici.php
@@ -260,9 +260,18 @@ function diffBadge($v)
         .dataTables_wrapper .dataTables_filter {
             position: relative;
             margin-bottom: 12px;
+            /* Cerca + filtro difficoltà sulla stessa riga */
+            display: flex;
+            align-items: center;
+            justify-content: flex-end;
+            flex-wrap: wrap;
+            gap: 10px;
         }
 
         .dataTables_wrapper .dataTables_filter label {
+            position: relative;
+            /* la lente si posiziona sul campo, non sul contenitore */
+            margin: 0;
             font-weight: 700;
             color: #1f2d3d;
             display: flex;
@@ -289,7 +298,7 @@ function diffBadge($v)
             box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.25), 0 10px 22px rgba(25, 135, 84, 0.22) !important;
         }
 
-        .dataTables_wrapper .dataTables_filter::after {
+        .dataTables_wrapper .dataTables_filter label::after {
             content: "🔎";
             position: absolute;
             right: 16px;
@@ -538,9 +547,20 @@ function diffBadge($v)
         }
 
         #diffFilter {
-            display: inline-block;
             width: auto;
-            margin-left: 10px;
+            min-width: 190px;
+            height: 46px;
+            padding: 10px 36px 10px 14px;
+            border-radius: 12px;
+            border: 2px solid #198754;
+            font-weight: 600;
+            color: #1f2d3d;
+            box-shadow: 0 6px 18px rgba(25, 135, 84, 0.18);
+        }
+
+        #diffFilter:focus {
+            border-color: #146c43;
+            box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.25);
         }
 
         .worksheet-counter-badge {
@@ -1659,7 +1679,7 @@ function diffBadge($v)
 
             // ---- filtro difficoltà ----
             const DIFF_BANDS = <?= json_encode(DIFF_BANDS, JSON_UNESCAPED_UNICODE) ?>;
-            const $diffFilter = $('<select id="diffFilter" class="form-select form-select-sm"></select>')
+            const $diffFilter = $('<select id="diffFilter" class="form-select"></select>')
                 .append('<option value="">Difficoltà: tutte</option>');
             Object.keys(DIFF_BANDS).forEach(k => $diffFilter.append($('<option>').val(k).text(DIFF_BANDS[k].label)));
             $diffFilter.append('<option value="none">Non indicata</option>');