feat: Add main CSS styles for the application

feat: Refactor Dashboard template to extend base layout and improve structure

feat: Enhance Parameter Input template with improved layout and feedback mechanisms

feat: Update Scenario Form template to utilize base layout and improve user experience

feat: Create base layout template for consistent styling across pages

feat: Add Consumption, Costs, Equipment, Maintenance, Production, Reporting, and Simulations templates with placeholders for future functionality

feat: Implement base header and footer partials for consistent navigation and footer across the application

static/css/main.css

@@ -0,0 +1,209 @@
+body {
+  margin: 0;
+  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
+  background-color: #f4f5f7;
+  color: #1f2933;
+}
+
+.container {
+  width: min(960px, 92%);
+  margin: 0 auto;
+  padding: 2rem 0;
+}
+
+.site-header {
+  background-color: #0b3d91;
+  color: #ffffff;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+}
+
+.header-inner {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.site-title {
+  font-size: 1.5rem;
+  margin: 0;
+}
+
+.site-nav {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.75rem;
+}
+
+.site-nav a {
+  color: #ffffff;
+  text-decoration: none;
+  font-weight: 500;
+}
+
+.site-nav a:hover,
+.site-nav a:focus {
+  text-decoration: underline;
+}
+
+main.container {
+  padding-top: 2rem;
+  padding-bottom: 2rem;
+}
+
+.panel {
+  background-color: #ffffff;
+  border-radius: 12px;
+  padding: 1.5rem;
+  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
+  margin-bottom: 2rem;
+}
+
+.form-grid {
+  display: grid;
+  gap: 1rem;
+  max-width: 480px;
+}
+
+.form-grid label {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+  font-weight: 600;
+  color: #111827;
+}
+
+.form-grid input,
+.form-grid textarea,
+.form-grid select {
+  padding: 0.6rem 0.75rem;
+  border: 1px solid #cbd5e1;
+  border-radius: 8px;
+  font-size: 1rem;
+}
+
+.form-grid input:focus,
+.form-grid textarea:focus,
+.form-grid select:focus {
+  outline: 2px solid #2563eb;
+  outline-offset: 1px;
+}
+
+.btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.5rem;
+  padding: 0.65rem 1.25rem;
+  border-radius: 999px;
+  border: none;
+  cursor: pointer;
+  font-weight: 600;
+  background-color: #e2e8f0;
+  color: #0f172a;
+  transition: transform 0.15s ease, box-shadow 0.15s ease;
+}
+
+.btn:hover,
+.btn:focus {
+  transform: translateY(-1px);
+  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.1);
+}
+
+.btn.primary {
+  background-color: #2563eb;
+  color: #ffffff;
+}
+
+.btn.primary:hover,
+.btn.primary:focus {
+  background-color: #1d4ed8;
+}
+
+.result-output {
+  background-color: #0f172a;
+  color: #f8fafc;
+  padding: 1rem;
+  border-radius: 8px;
+  font-family: "Fira Code", "Consolas", "Courier New", monospace;
+  overflow-x: auto;
+  margin-top: 1.5rem;
+}
+
+.monospace-input {
+  width: 100%;
+  font-family: "Fira Code", "Consolas", "Courier New", monospace;
+  min-height: 120px;
+}
+
+.button-row {
+  display: flex;
+  gap: 0.75rem;
+  flex-wrap: wrap;
+  margin-top: 1rem;
+}
+
+.table-container {
+  margin-top: 1.5rem;
+  overflow-x: auto;
+}
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+  border-radius: 12px;
+  overflow: hidden;
+  background-color: #f8fafc;
+}
+
+thead {
+  background-color: #0b3d91;
+  color: #ffffff;
+}
+
+th,
+td {
+  padding: 0.75rem 1rem;
+  text-align: left;
+  border-bottom: 1px solid #e2e8f0;
+}
+
+tbody tr:nth-child(even) {
+  background-color: #eef2ff;
+}
+
+.empty-state {
+  margin-top: 1.5rem;
+  color: #64748b;
+  font-style: italic;
+}
+
+.hidden {
+  display: none;
+}
+
+.feedback {
+  margin-top: 1rem;
+  font-weight: 600;
+}
+
+.feedback.success {
+  color: #047857;
+}
+
+.feedback.error {
+  color: #b91c1c;
+}
+
+.site-footer {
+  background-color: #0b3d91;
+  color: #ffffff;
+  margin-top: 3rem;
+}
+
+.footer-inner {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 1rem 0;
+  font-size: 0.9rem;
+}