add many styles

assets/css/main.css

@@ -1,22 +1,78 @@
+:root {
+  --beetbox-red: #9e0008;
+  --beetbox-pink: #d93370;
+  --beetbox-purple: #ac65cb;
+  --beetbox-green: #003f56;
+  --beetbox-blue: #5fcfd0;
+
+  --light: #F8F8FF;
+
+  --background: #1f2835;
+  --text: var(--light);
+  --links: var(--beetbox-blue);
+  --link-hover: var(--beetbox-pink);
+}
+
 body {
-  color: #222;
+  background-color: var(--background);
+  color: var(--text);
   font-family: sans-serif;
   line-height: 1.5;
-  margin: 1rem;
-  max-width: 768px;
+  padding: 0;
+  margin: 0;
+}
+
+a {
+  color: var(--links);
+  text-decoration: none;
+  transition: color 0.2s ease;
+}
+
+a:hover {
+  color: var(--link-hover);
+  text-decoration: underline;
+}
+
+p {
+  margin-bottom: 1.5rem;
 }
 
 header {
-  border-bottom: 1px solid #222;
-  margin-bottom: 1rem;
+  padding: 4px;
+  background-color: #f8f8ffcc;
+}
+
+header div {max-width: 1200px; margin: 0 auto;}
+
+nav ul li { font-weight: 600; }
+
+main {
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 1rem;
 }
 
 footer {
-  border-top: 1px solid #222;
-  margin-top: 1rem;
+  border-top: 1px solid var(--light);
+  max-width: 1200px;
+  margin: 0 auto;
 }
 
-a {
-  color: #00e;
-  text-decoration: none;
+code { white-space: nowrap; }
+
+pre {
+	border-radius: .4rem;
+	max-width: 100%;
 }
+
+pre code {
+	display: block;
+    tab-size: 4;
+	padding: 1rem 1.5rem;
+	font-size: 1.05rem;
+	white-space: pre;
+	max-width: 100%;
+	overflow-x: auto;
+	border-left: .3rem solid var(--beetbox-purple);
+   	border-radius: .4rem;
+	}