툴팁 css 추가

src/styles/_table.scss

@@ -115,7 +115,27 @@ table{
         cursor: pointer;
         span{
             position: absolute;
+            top: -25px;
+            left: -10px;
+            padding: 3px 7px;
+            font-size: 11px;
+            font-weight: 400;
+            color: #344356;
+            background-color: #F7F9FA;
+            border: 1px solid #ECF0F4;
+            border-radius: 30px;
             white-space: nowrap;
+            opacity: 0;
+            visibility: hidden;
+            z-index: 99;
+            transition: all .15s ease-in-out;
+        }
+        &:hover{
+            span{
+                top: -30px;
+                opacity: 1;
+                visibility: visible;
+            }
         }
     }
 }