feat: add Berlin Clock layout and styling with Orbitron font

src/index.css

@@ -1,3 +1,5 @@
+@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;700&display=swap');
+
 :root {
   --text: #6b6375;
   --text-h: #08060d;
@@ -59,6 +61,8 @@
   min-height: 100svh;
   display: flex;
   flex-direction: column;
+  justify-content: center;
+  align-items: center;
   box-sizing: border-box;
 }
 
@@ -109,3 +113,11 @@ code {
   padding: 4px 8px;
   background: var(--code-bg);
 }
+
+.clock-container {
+  font-family: 'Orbitron', monospace;
+}
+
+.clock-container input {
+  font-family: inherit;
+}