add: backlink, technical aspects, nav

Add "Wissen" to navigation, fix some smaller issues, add backlink to posts

app/assets/styles/general.css

@@ -188,4 +188,10 @@ a:has(button) {
 .grow {
   flex-grow: 1;
   height: var(--padding-s);
+}
+
+.back {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--padding-default);
 }

app/assets/styles/page.css

@@ -50,11 +50,7 @@
     background: var(--color-lightest);
     height: 100%;
 
-    h1:first-of-type,
-    h2:first-of-type,
-    h3:first-of-type,
-    p:first-of-type,
-    figure:first-of-type {
+    & :is(h1, h2, h3, p, figure):first-of-type {
         margin-top: 0;
     }
 }
@@ -78,16 +74,26 @@
     padding: var(--padding-l) var(--padding-default);
     color: var(--color-darkest);
 
-    ul {
+    & ul {
         margin: 0 0 0 var(--padding-default);
     }
+
+    & a {
+        color: var(--color-main-dark);
+        text-decoration: none;
+        transition: var(--transition-default);
+
+        &:hover {
+            color: var(--color-main-darkest);
+        }
+    }
 }
 
 ul.link-liste {
     list-style: none;
     margin: var(--padding-default) 0 0;
     
-    a {
+    & a {
         text-decoration: none;
         color: var(--color-text)
     }