feat(ui): add metrics section with lighthouse scores and circular gauges

styles.css

@@ -798,3 +798,62 @@ footer {
         animation: none;
     }
 }
+
+/* Metrics Banner */
+.metrics-banner {
+    background-color: var(--color-coffee-dark);
+    color: var(--color-cream);
+    padding-block: 4rem;
+    position: relative;
+    z-index: 2;
+}
+
+.metric-item {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 1rem;
+    padding: 1rem;
+    transition: transform 0.3s ease;
+}
+
+.metric-item:hover {
+    transform: translateY(-5px);
+}
+
+.gauge {
+    width: 100px;
+    height: 100px;
+    border-radius: 50%;
+    background: conic-gradient(var(--color-secondary) var(--percent), rgba(255,255,255,0.1) 0);
+    position: relative;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    box-shadow: 0 0 20px rgba(0,0,0,0.2);
+}
+
+.gauge::before {
+    content: attr(data-score);
+    position: absolute;
+    width: 84%;
+    height: 84%;
+    background-color: var(--color-coffee-dark);
+    border-radius: 50%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-weight: 800;
+    font-size: 1.75rem;
+    color: var(--color-cream);
+    font-family: var(--font-sans);
+}
+
+.metric-label {
+    font-weight: 600;
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+    font-size: 0.9rem;
+    opacity: 0.9;
+    text-align: center;
+}