implemented step 15 by Gemini

- Rendering HTML

src/Templates/css/site.css

@@ -0,0 +1,83 @@
+/* Reset & Base Styles */
+:root {
+	--primary-color: #2563eb;
+	--text-color: #1f2937;
+	--bg-color: #ffffff;
+	--section-padding: 5rem 1.5rem;
+}
+
+* {
+	box-sizing: border-box;
+	margin: 0;
+	padding: 0;
+}
+
+body {
+	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+	color: var(--text-color);
+	background-color: var(--bg-color);
+	line-height: 1.6;
+}
+
+h1, h2, h3 {
+	line-height: 1.2;
+	margin-bottom: 1.5rem;
+}
+
+p {
+	margin-bottom: 1rem;
+}
+
+.container {
+	max-width: 1200px;
+	margin: 0 auto;
+	padding: 0 1.5rem;
+}
+
+section {
+	padding: var(--section-padding);
+}
+
+/* Common Components */
+.btn {
+	display: inline-block;
+	padding: 0.75rem 1.5rem;
+	border-radius: 0.375rem;
+	font-weight: 600;
+	text-decoration: none;
+	transition: all 0.2s;
+	cursor: pointer;
+}
+
+.btn-primary {
+	background-color: var(--primary-color);
+	color: white;
+}
+
+.btn-primary:hover {
+	opacity: 0.9;
+}
+
+/* Header & Nav */
+header {
+	padding: 1.5rem 0;
+	border-bottom: 1px solid #e5e7eb;
+}
+
+nav .container {
+	display: flex;
+	justify-content: space-between;
+	align-items: center;
+}
+
+.logo img {
+	height: 2.5rem;
+}
+
+/* Footer */
+footer {
+	background-color: #111827;
+	color: white;
+	padding: 4rem 0;
+	margin-top: 2rem;
+}