diff --git a/results_visualization/css/layout.css b/results_visualization/css/layout.css
new file mode 100644
index 0000000..c6b0d80
--- /dev/null
+++ b/results_visualization/css/layout.css
@@ -0,0 +1,97 @@
+/* ==============================
+   App Layout
+   ============================== */
+
+.app-shell {
+  display: flex;
+  flex-direction: column;
+  min-height: 100vh;
+  background-color: #f7f7f7;
+  color: #222;
+  font-family: sans-serif;
+}
+
+.app-header {
+  background-color: #ffffff;
+  border-bottom: 1px solid #ddd;
+  padding: 1rem 2rem;
+  font-size: 1.25rem;
+  font-weight: 600;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.app-main {
+  flex: 1;
+  display: flex;
+  flex-direction: row;
+  padding: 1rem 2rem;
+  gap: 1rem;
+  flex-wrap: wrap;
+}
+
+.app-footer {
+  background-color: #fafafa;
+  border-top: 1px solid #ddd;
+  text-align: center;
+  padding: 0.75rem;
+  font-size: 0.875rem;
+  color: #555;
+}
+
+/* ==============================
+   Panels
+   ============================== */
+
+.filter-panel {
+  flex: 0 0 250px;
+  background-color: #ffffff;
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  padding: 1rem;
+  box-sizing: border-box;
+  height: fit-content;
+}
+
+.chart-container {
+  flex: 2 1 600px;
+  background-color: #ffffff;
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  padding: 1rem;
+  box-sizing: border-box;
+  min-height: 400px;
+}
+
+.stats-panel {
+  flex: 1 1 300px;
+  background-color: #ffffff;
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  padding: 1rem;
+  box-sizing: border-box;
+  min-height: 200px;
+}
+
+@media (max-width: 900px) {
+  .app-main {
+    flex-direction: column;
+    padding: 1rem;
+  }
+
+  .filter-panel, .chart-container, .stats-panel {
+    flex: 1 1 100%;
+  }
+}
+
+/* ==============================
+   Footer Copyright
+   ============================== */
+.app-footer::after {
+  content: "© 2026 Donau2Space.de";
+  display: block;
+  margin-top: 0.25rem;
+  font-size: 0.8rem;
+  color: #888;
+}
\ No newline at end of file