Add Threema entry to profiles list incl QR-Code

content/profiles/index.md

@@ -18,3 +18,4 @@ The following list is probably not complete and will change over time.
 | Mastodon/Fediverse | [@jotoho@ruhr.social](https://ruhr.social/@jotoho) |                                                                                                                                              |
 | GitLab             | [@jotoho](https://gitlab.com/jotoho)               | Preferred Git hosting platform                                                                                                               |
 | GitHub             | [@jotoho](https://github.com/jotoho)               |                                                                                                                                              |
+| Threema            | [8WEESJ8K](https://threema.id/8WEESJ8K)            | <details><summary>QR-Code containing Threema-ID</summary>![Scannable QR-Code](threema-scanid-8weesj8k.png)</details>                         |

static/css/general.css

@@ -162,6 +162,27 @@ th {
   padding: 0.5rem;
 }
 
+img {
+  display: block;
+  width: fit-content;
+  max-width: 100%;
+  height: auto;
+  max-height: min(90vh, 100%);
+  margin-left: auto;
+  margin-right: auto;
+}
+
+details {
+  border-color: grey;
+  border-width: 1px;
+  border-style: dashed;
+  padding: calc(1rem / 3);
+}
+
+details[open] > summary {
+  margin-bottom: calc(1rem / 3);
+}
+
 #licenseimg {
   vertical-align: middle;
   height: inherit;