Add vivaldi browser modifications

.vivaldi-mods/css/hover-bookmark-bar.css

@@ -0,0 +1,48 @@
+/*
+ * Autohide bookmark bar
+ * Forum link: https://forum.vivaldi.net/topic/95511/overlay-bookmark-bar
+ */
+
+#browser {
+    --bookmark-bar-hide-delay: 400ms;
+    --bookmark-bar-show-ctrlkey: false;
+}
+
+.bookmark-bar-top:is(.address-top, .tabs-top) {
+    #main:has(.bookmark-bar:hover) #webview-container {
+        pointer-events: none !important;
+    }
+    &.tabs-top #tabs-subcontainer {
+        -webkit-app-region: no-drag !important;
+    }
+    
+    .bookmark-bar {
+        height: 0 !important;
+        border: none !important;
+    }
+    .bookmark-bar .observer {
+        position: absolute !important;
+        z-index: 4 !important;
+        width: 100% !important;
+        border-bottom: solid 1px var(--colorBorder) !important;
+        clip-path: inset(0 0 100% 0) !important;
+        transition-delay: var(--bookmark-bar-hide-delay) !important;
+    }
+    &:has(.button-disabled-preview):has(.tabbar-wrapper:hover).tabs-top .bookmark-bar .observer,
+    &:has(.button-disabled-preview).address-top .bookmark-bar:is(.mainbar:not(:has(.OmniDropdown, nav.menu)):hover ~ *) .observer,
+    .bookmark-bar:is(:focus-within, :hover) .observer {
+        clip-path: inset(0 0 -1px 0) !important;
+        transition: clip-path 150ms cubic-bezier(0, 1, 0, 0.9) 50ms !important;
+    }
+    @container not style(--bookmark-bar-show-ctrlkey: true) {
+        &:has(.tabbar-wrapper:hover).tabs-top .bookmark-bar .observer,
+        &.address-top .bookmark-bar:is(.mainbar:not(:has(.OmniDropdown, nav.menu)):hover ~ *) .observer,
+        .bookmark-bar:is(:focus-within, :hover) .observer {
+            clip-path: inset(0 0 -1px 0) !important;
+            transition: clip-path 150ms cubic-bezier(0, 1, 0, 0.9) 50ms !important;
+        }
+    }
+    &.animation-off .bookmark-bar .observer {
+        transition-duration: 0ms !important;
+    }
+}