1 files changed, 95 insertions, 0 deletions
diff --git a/packages/ui/src/components/message-nav.css b/packages/ui/src/components/message-nav.css
new file mode 100644
index 000000000..6e9d96a26
--- /dev/null
+++ b/packages/ui/src/components/message-nav.css
@@ -0,0 +1,95 @@
+[data-component="message-nav"] {
+  /* margin-right: 32px; */
+  /* margin-top: 12px; */
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  padding-left: 0;
+  list-style: none;
+
+  &[data-size="normal"] {
+    position: absolute;
+    right: 100%;
+    width: 240px;
+    /* margin-top: 12px; */
+
+    @media (min-width: 80rem) {
+      gap: 8px;
+      /* margin-top: 4px; */
+    }
+  }
+}
+
+[data-slot="message-nav-item"] {
+  display: flex;
+  align-items: center;
+  align-self: stretch;
+  justify-content: flex-end;
+
+  [data-component="message-nav"][data-size="normal"] & {
+    justify-content: flex-start;
+  }
+}
+
+[data-slot="message-nav-tick-button"] {
+  display: flex;
+  align-items: center;
+  justify-content: flex-start;
+  height: 8px;
+  width: 32px;
+  /* margin-right: -12px; */
+  cursor: pointer;
+  border: none;
+  background: none;
+  padding: 0;
+
+  &[data-active] [data-slot="message-nav-tick-line"] {
+    background-color: var(--icon-strong-base);
+    width: 100%;
+  }
+}
+
+[data-slot="message-nav-tick-line"] {
+  height: 1px;
+  width: 20px;
+  background-color: var(--icon-base);
+  transition:
+    width 0.2s,
+    background-color 0.2s;
+}
+
+[data-slot="message-nav-tick-button"]:hover [data-slot="message-nav-tick-line"] {
+  width: 100%;
+  background-color: var(--icon-strong-base);
+}
+
+[data-slot="message-nav-message-button"] {
+  display: flex;
+  align-items: center;
+  align-self: stretch;
+  width: 100%;
+  column-gap: 8px;
+  cursor: default;
+  border: none;
+  background: none;
+  padding: 0;
+}
+
+[data-slot="message-nav-title-preview"] {
+  font-size: 14px; /* text-14-regular */
+  color: var(--text-weak);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  min-width: 0;
+  text-align: left;
+
+  &[data-active] {
+    color: var(--text-strong);
+  }
+}
+
+[data-slot="message-nav-item"]:hover [data-slot="message-nav-title-preview"] {
+  color: var(--text-base);
+}