first upload all files

Modules/Admin/Resources/assets/sass/modal.scss

@@ -0,0 +1,75 @@
+.modal {
+    background: rgba(0, 0, 0, 0.3);
+
+    &.fade {
+        .modal-dialog {
+            opacity: 0;
+            transform: scale(0.9);
+            transition: 100ms ease-in-out;
+        }
+
+        &.in .modal-dialog {
+            transform: scale(1);
+            opacity: 1;
+        }
+    }
+
+    .modal-header {
+        padding: 15px;
+        border-bottom-color: #e9e9e9;
+
+        > .close {
+            font-size: 18px;
+            outline: 0;
+            margin-top: 2px;
+            -webkit-text-stroke: 1px #ffffff;
+            transition: 200ms ease-in-out;
+        }
+    }
+
+    .modal-content {
+        border: none;
+        border-radius: 3px;
+        box-shadow: 0 2px 3px rgba(0, 0, 0, 0.12);
+    }
+
+    .modal-footer {
+        border-radius: 0 0 3px 3px;
+        border-top-color: #e9e9e9;
+
+        .btn + .btn {
+            margin-left: 12px;
+        }
+    }
+}
+
+#confirmation-modal {
+    .modal-header {
+        padding: 15px 15px 15px 25px;
+    }
+
+    .modal-body {
+        padding: 0px 15px 25px 25px;
+    }
+
+    .modal-header,
+    .modal-footer {
+        border: none;
+    }
+
+    .default-message {
+        color: #737881;
+    }
+
+    .modal-footer {
+        background: #f1f3f7;
+    }
+
+    .btn-default {
+        background: #e1e1e1;
+
+        &:hover {
+            background: #e9e9e9;
+        }
+    }
+}