Fixed progress bar overflow with floating tooltip action

src/app.css

@@ -27,3 +27,32 @@ body {
   margin: 0;
   min-height: 100svh;
 }
+
+.tooltip-floating {
+  position: fixed;
+  z-index: 9999;
+  background: var(--surface);
+  color: var(--text);
+  border: 1px solid var(--border);
+  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
+  font-family: var(--sans);
+  font-size: 0.85rem;
+  font-weight: 400;
+  white-space: nowrap;
+  padding: 0.45em 0.9em;
+  border-radius: 8px;
+  pointer-events: none;
+  opacity: 0;
+  transform: translateY(4px);
+  transition: opacity 0.15s ease, transform 0.15s ease;
+}
+
+.tooltip-floating::after {
+  content: '';
+  position: absolute;
+  top: 100%;
+  left: 50%;
+  transform: translateX(-50%);
+  border: 6px solid transparent;
+  border-top-color: var(--border);
+}