From b5ef66634e8062e4b9696d5993b9e9f387825c81 Mon Sep 17 00:00:00 2001
From: Mika <kontakt@donau2space.de>
Date: Sat, 24 Jan 2026 12:03:26 +0000
Subject: [PATCH] Add visualization_tool/css/base.css

---
 visualization_tool/css/base.css | 130 ++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 visualization_tool/css/base.css

diff --git a/visualization_tool/css/base.css b/visualization_tool/css/base.css
new file mode 100644
index 0000000..fc5065c
--- /dev/null
+++ b/visualization_tool/css/base.css
@@ -0,0 +1,130 @@
+:root {
+  /* Color Scheme */
+  --color-bg: #f9fafb;
+  --color-surface: #ffffff;
+  --color-border: #d1d5db;
+  --color-text: #111827;
+  --color-text-muted: #6b7280;
+  --color-primary: #2563eb;
+  --color-primary-light: #60a5fa;
+  --color-success: #16a34a;
+  --color-danger: #dc2626;
+
+  /* Typography */
+  --font-base: 'Inter', system-ui, -apple-system, sans-serif;
+  --font-size-base: 1rem;
+  --font-size-sm: 0.875rem;
+  --font-size-lg: 1.125rem;
+  --line-height-base: 1.5;
+
+  /* Spacing */
+  --spacing-xs: 0.25rem;
+  --spacing-sm: 0.5rem;
+  --spacing-md: 1rem;
+  --spacing-lg: 1.5rem;
+  --spacing-xl: 2rem;
+
+  /* Layout */
+  --max-width: 1200px;
+  --border-radius: 0.25rem;
+  --transition-base: 0.2s ease-in-out;
+
+  /* Breakpoints */
+  --bp-sm: 640px;
+  --bp-md: 768px;
+  --bp-lg: 1024px;
+  --bp-xl: 1280px;
+}
+
+/* Reset / Normalize */
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+html {
+  font-size: 100%;
+  -webkit-text-size-adjust: 100%;
+  -moz-text-size-adjust: 100%;
+  text-size-adjust: 100%;
+}
+
+body, h1, h2, h3, h4, h5, h6, p {
+  font-family: var(--font-base);
+  color: var(--color-text);
+}
+
+img, svg, video, canvas, audio, iframe, embed, object {
+  display: block;
+  vertical-align: middle;
+  max-width: 100%;
+  height: auto;
+}
+
+ul, ol {
+  list-style: none;
+}
+
+a {
+  color: var(--color-primary);
+  text-decoration: none;
+  transition: color var(--transition-base);
+}
+
+a:hover, a:focus {
+  color: var(--color-primary-light);
+}
+
+button, input, select, textarea {
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit;
+}
+
+/* Basic Layout */
+body {
+  background-color: var(--color-bg);
+  font-size: var(--font-size-base);
+  line-height: var(--line-height-base);
+  display: flex;
+  flex-direction: column;
+  min-height: 100vh;
+}
+
+.app-shell {
+  display: flex;
+  flex-direction: column;
+  flex-grow: 1;
+  max-width: var(--max-width);
+  width: 100%;
+  margin: 0 auto;
+  padding: var(--spacing-md);
+}
+
+/* Responsive adjustments */
+@media (min-width: var(--bp-md)) {
+  .app-shell {
+    padding: var(--spacing-lg);
+  }
+}
+
+@media (min-width: var(--bp-lg)) {
+  .app-shell {
+    padding: var(--spacing-xl);
+  }
+}
+
+/* Footer Copyright */
+footer {
+  text-align: center;
+  padding: var(--spacing-md);
+  color: var(--color-text-muted);
+  font-size: var(--font-size-sm);
+}
+
+footer::after {
+  content: '© 2026 Donau2Space.de';
+  display: block;
+  margin-top: var(--spacing-xs);
+}
\ No newline at end of file