diff --git a/data_visualization/css/components.css b/data_visualization/css/components.css
new file mode 100644
index 0000000..d5e19b3
--- /dev/null
+++ b/data_visualization/css/components.css
@@ -0,0 +1,141 @@
+:root {
+  --primary: #1e88e5;
+  --secondary: #81d4fa;
+  --background: #111;
+  --surface: #1b1b1b;
+  --text: #f0f0f0;
+  --accent: #ffca28;
+  --radius-md: 6px;
+  --spacing-xs: 0.25rem;
+  --spacing-sm: 0.5rem;
+  --spacing-md: 1rem;
+  --spacing-lg: 2rem;
+  --shadow-elevated: 0 2px 8px rgba(0, 0, 0, 0.4);
+}
+
+/* =====================
+   Filter Panel
+   ===================== */
+.filter-panel {
+  display: flex;
+  flex-wrap: wrap;
+  gap: var(--spacing-sm);
+  align-items: center;
+  background-color: var(--surface);
+  padding: var(--spacing-md);
+  border-radius: var(--radius-md);
+  box-shadow: var(--shadow-elevated);
+  color: var(--text);
+}
+
+.filter-input {
+  flex: 1;
+  min-width: 140px;
+  padding: var(--spacing-sm);
+  border: 1px solid var(--secondary);
+  border-radius: var(--radius-md);
+  background-color: #222;
+  color: var(--text);
+  font-size: 0.95rem;
+}
+
+.filter-input:focus {
+  outline: none;
+  border-color: var(--accent);
+  box-shadow: 0 0 0 2px rgba(255, 202, 40, 0.3);
+}
+
+.filter-button {
+  padding: var(--spacing-sm) var(--spacing-md);
+  background-color: var(--primary);
+  color: #fff;
+  border: none;
+  border-radius: var(--radius-md);
+  cursor: pointer;
+  transition: background-color 0.2s ease;
+}
+
+.filter-button:hover,
+.filter-button:focus {
+  background-color: var(--accent);
+  color: #000;
+}
+
+/* =====================
+   Chart Panel
+   ===================== */
+.chart-panel {
+  background-color: var(--surface);
+  border-radius: var(--radius-md);
+  box-shadow: var(--shadow-elevated);
+  padding: var(--spacing-lg) var(--spacing-md);
+  margin-top: var(--spacing-md);
+  overflow-x: auto;
+}
+
+.summary-panel {
+  background-color: #212121;
+  border: 1px solid #333;
+  border-radius: var(--radius-md);
+  padding: var(--spacing-md);
+  margin-top: var(--spacing-md);
+  box-shadow: var(--shadow-elevated);
+  color: var(--text);
+}
+
+.summary-panel h3 {
+  margin-top: 0;
+  color: var(--accent);
+  font-size: 1.1rem;
+}
+
+/* =====================
+   Tooltips
+   ===================== */
+.tooltip {
+  position: absolute;
+  background-color: rgba(0, 0, 0, 0.85);
+  color: var(--text);
+  padding: var(--spacing-xs) var(--spacing-sm);
+  border-radius: var(--radius-md);
+  font-size: 0.85rem;
+  line-height: 1.4;
+  pointer-events: none;
+  white-space: nowrap;
+  z-index: 1000;
+  transition: opacity 0.15s ease;
+}
+
+.tooltip[data-visible="false"] {
+  opacity: 0;
+}
+
+.tooltip[data-visible="true"] {
+  opacity: 1;
+}
+
+/* =====================
+   Responsive
+   ===================== */
+@media (min-width: 640px) {
+  .filter-panel {
+    flex-wrap: nowrap;
+  }
+}
+
+/* =====================
+   Footer (Copyright)
+   ===================== */
+footer {
+  text-align: center;
+  color: var(--text);
+  font-size: 0.8rem;
+  padding: var(--spacing-lg) 0;
+  opacity: 0.6;
+}
+
+footer::after {
+  content: "© 2026 Donau2Space.de";
+  display: block;
+  margin-top: var(--spacing-xs);
+}
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