updated the cookies functionality

styles/sass/welshgov/_application.scss

@@ -1491,6 +1491,11 @@ ul#sharePageLinks.active {
 .paragraph--type--call-out-message {
     border-left-color: $blue;
     background-color: $lightgrey_light;
+
+    &.call-out-type-positive-alert-message {
+        background: #cdf7d4;
+        border-left: 10px solid #019e1e;
+    }
 }
 
 #cookies-js form {
@@ -1701,3 +1706,107 @@ ul#sharePageLinks.active {
         background-color: $white;
     }
 }
+
+// modal timeout
+
+.modal {
+    position: fixed;
+    top: 0;
+    left: 0;
+    z-index: 1060;
+    display: none;
+    width: 100%;
+    height: 100%;
+    overflow: hidden;
+    outline: 0;
+}
+
+fade {
+    transition: opacity 0.15s linear;
+}
+
+.modal-open .modal {
+    overflow-x: hidden;
+    overflow-y: auto;
+}
+
+.modal-backdrop {
+    position: fixed;
+    top: 0;
+    left: 0;
+    z-index: 1040;
+    width: 100vw;
+    height: 100vh;
+    background-color: #000;
+}
+
+.modal-backdrop.fade {
+    opacity: 0;
+}
+
+.modal-backdrop.show {
+    opacity: 0.5;
+}
+
+.modal-dialog {
+    position: relative;
+    width: auto;
+    margin: 0.5rem;
+    pointer-events: none;
+}
+
+@media (min-width: 576px) {
+    .modal-dialog {
+        max-width: 500px;
+        margin: 1.75rem auto;
+    }
+}
+.modal.show .modal-dialog {
+    transform: none;
+}
+.modal.fade .modal-dialog {
+    transition: transform 0.3s ease-out;
+    transform: translate(0, -50px);
+}
+
+.modal-content {
+    position: relative;
+    display: flex;
+    flex-direction: column;
+    width: 100%;
+    pointer-events: auto;
+    background-color: #fff;
+    background-clip: padding-box;
+    border: 1px solid rgba(0, 0, 0, 0.2);
+    border-radius: 0.3rem;
+    outline: 0;
+}
+
+.modal-footer {
+    display: flex;
+    flex-wrap: wrap;
+    flex-shrink: 0;
+    align-items: center;
+    justify-content: flex-end;
+    padding: 0.75rem;
+    border-top: 1px solid #dee2e6;
+    border-bottom-right-radius: calc(0.3rem - 1px);
+    border-bottom-left-radius: calc(0.3rem - 1px);
+}
+
+.modal-body {
+    position: relative;
+    flex: 1 1 auto;
+    padding: 1rem;
+}
+
+.modal-header {
+    display: flex;
+    flex-shrink: 0;
+    align-items: center;
+    justify-content: space-between;
+    padding: 1rem 1rem;
+    border-bottom: 1px solid #dee2e6;
+    border-top-left-radius: calc(0.3rem - 1px);
+    border-top-right-radius: calc(0.3rem - 1px);
+}