From d2b8cf9356f309adc0976fbc7030f9d7b84a4abc Mon Sep 17 00:00:00 2001
From: Mika <kontakt@donau2space.de>
Date: Mon, 23 Mar 2026 11:13:25 +0000
Subject: [PATCH] Add data_visualization/css/layout.css

---
 data_visualization/css/layout.css | 129 ++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 data_visualization/css/layout.css

diff --git a/data_visualization/css/layout.css b/data_visualization/css/layout.css
new file mode 100644
index 0000000..0c97209
--- /dev/null
+++ b/data_visualization/css/layout.css
@@ -0,0 +1,129 @@
+:root {
+  --primary-color: #2b5fab;
+  --background-light: #f6f7f9;
+  --text-color: #222;
+  --text-muted: #666;
+  --spacing-sm: 0.5rem;
+  --spacing-md: 1rem;
+  --spacing-lg: 2rem;
+  --border-radius: 4px;
+  --font-base: 16px;
+  --transition-fast: 0.2s ease-in-out;
+}
+
+body {
+  margin: 0;
+  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
+  background-color: var(--background-light);
+  color: var(--text-color);
+  font-size: var(--font-base);
+}
+
+/* ================================ */
+/* Filter and Chart Layout */
+/* ================================ */
+
+.filter-panel {
+  display: flex;
+  flex-wrap: wrap;
+  gap: var(--spacing-sm);
+  align-items: center;
+  padding: var(--spacing-md);
+  background-color: #fff;
+  border-radius: var(--border-radius);
+  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
+  margin-bottom: var(--spacing-md);
+}
+
+.chart-panel {
+  background-color: #fff;
+  border-radius: var(--border-radius);
+  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
+  padding: var(--spacing-lg);
+  display: flex;
+  flex-direction: column;
+  min-height: 300px;
+  transition: box-shadow var(--transition-fast);
+}
+
+.chart-panel:hover {
+  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
+}
+
+@media (min-width: 768px) {
+  .layout-container {
+    display: grid;
+    grid-template-columns: 300px 1fr;
+    gap: var(--spacing-md);
+  }
+  .filter-panel {
+    flex-direction: column;
+  }
+}
+
+/* ================================ */
+/* Summary Metrics */
+/* ================================ */
+
+.summary-metrics {
+  display: flex;
+  flex-wrap: wrap;
+  justify-content: space-around;
+  background-color: #fff;
+  border-radius: var(--border-radius);
+  padding: var(--spacing-md);
+  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
+  margin-bottom: var(--spacing-md);
+}
+
+.summary-metrics__item {
+  text-align: center;
+  margin: var(--spacing-sm);
+}
+
+.summary-metrics__label {
+  display: block;
+  color: var(--text-muted);
+  font-size: 0.875rem;
+  margin-bottom: var(--spacing-sm);
+}
+
+.summary-metrics__value {
+  font-size: 1.5rem;
+  font-weight: bold;
+  color: var(--primary-color);
+}
+
+@media (min-width: 1024px) {
+  .summary-metrics__value {
+    font-size: 2rem;
+  }
+}
+
+/* ================================ */
+/* Accessibility Enhancements */
+/* ================================ */
+
+.filter-panel button:focus,
+.chart-panel button:focus,
+.summary-metrics__item:focus-within {
+  outline: 2px solid var(--primary-color);
+  outline-offset: 2px;
+}
+
+/* ================================ */
+/* Footer */
+/* ================================ */
+
+footer {
+  text-align: center;
+  font-size: 0.875rem;
+  color: var(--text-muted);
+  padding: var(--spacing-md);
+}
+
+footer::after {
+  content: "© 2026 Donau2Space.de";
+  display: block;
+  margin-top: var(--spacing-sm);
+}
\ No newline at end of file