Frontend: roher Oldschool-Look, CSS auf 6 Zeilen

- Dark-Theme, Farbvariablen, Border-Radius, custom Form-Controls und
  Layout-Zentrierung entfernt -> natives Browser-Default-Rendering
- nur noch: 1px-Rahmen um Beitraege (eckig), graue Nebentexte, rote
  Fehler, fett fuer gewaehlte Stimme
- Textarea-Hoehe via rows-Attribut, <details> nativ (Danger-Klasse weg)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/css/app.css

@@ -1,82 +1,6 @@
-:root {
-  --bg: #15171a;
-  --card: #1e2126;
-  --fg: #e8e8e8;
-  --muted: #9aa0a6;
-  --accent: #4a9eff;
-  --border: #2a2e35;
-  --danger: #c0392b;
-}
-
-* { box-sizing: border-box; }
-
-body {
-  margin: 0;
-  font-family: system-ui, sans-serif;
-  background: var(--bg);
-  color: var(--fg);
-}
-
-a { color: var(--accent); }
-h1 { margin: 0; font-size: 1.4rem; }
-h2 { margin: 0 0 0.8rem; font-size: 1.1rem; }
-
-header {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  padding: 1rem 1.5rem;
-  background: var(--bg);
-  border-bottom: 1px solid var(--border);
-  position: sticky;
-  top: 0;
-}
-
-main { max-width: 600px; margin: 0 auto; padding: 1rem; }
-section { margin-bottom: 1.5rem; }
-
-input, textarea, button {
-  font: inherit;
-  padding: 0.6rem 0.8rem;
-  color: var(--fg);
-  background: var(--card);
-  border: 1px solid var(--border);
-  border-radius: 6px;
-}
-input, textarea { width: 100%; margin-bottom: 0.6rem; }
-textarea { min-height: 80px; resize: vertical; }
-button {
-  width: auto;
-  cursor: pointer;
-  color: #fff;
-  background: var(--accent);
-  border-color: var(--accent);
-}
-button:hover { opacity: 0.9; }
-
-.card {
-  padding: 1rem;
-  margin-bottom: 1rem;
-  background: var(--card);
-  border: 1px solid var(--border);
-  border-radius: 8px;
-}
-.card img { max-width: 100%; margin-top: 0.6rem; border-radius: 6px; }
-
-.muted { color: var(--muted); font-size: 0.9rem; }
-.content { margin-top: 0.5rem; white-space: pre-wrap; word-wrap: break-word; }
-.msg { min-height: 1.2em; font-size: 0.9rem; color: #ff6b6b; }
-.end { text-align: center; padding: 2rem 0; }
-
-.row { display: flex; align-items: center; gap: 0.75rem; margin-top: 0.8rem; }
-.ghost {
-  color: var(--fg);
-  background: transparent;
-  border-color: var(--border);
-  padding: 0.3rem 0.7rem;
-}
-.ghost:hover { border-color: var(--accent); }
-.ghost.selected { color: #fff; background: var(--accent); border-color: var(--accent); }
-
-.danger summary { cursor: pointer; color: #ff6b6b; }
-.danger button { background: var(--danger); border-color: var(--danger); }
+.card { border: 1px solid; padding: 0.5em; margin-bottom: 1em; }
+.card img { max-width: 100%; }
+.content { overflow-wrap: break-word; }
+.muted { color: gray; }
+.ghost.selected { font-weight: bold; }
+.msg { color: red; }