Made the header button show/hide work

app/styles/history.css

@@ -0,0 +1,38 @@
+.history-background {
+    grid-column: 1/2;
+    grid-row: 1/2;
+    height: 40vh;
+    overflow: hidden;
+    background-color: var(--history-background-color);
+    padding: 1em;
+    border-radius: 2em;
+    margin: 1em;
+}
+
+.history {
+    height: 100%;
+    overflow-y: scroll;
+    padding-right: 10px;
+}
+
+.history ul {
+    list-style: none;
+}
+
+.history ul li {
+    padding: 10px 0;
+    border-bottom: 1px solid var(--text-color);
+    width: 100%;
+}
+
+.history ul li a {
+    display: block;
+    text-decoration: none;
+    color: white;
+    width: 100%;
+    padding: 5px;
+}
+
+.history ul li a:hover {
+    background-color: var(--input-button-hover-color);
+}