Add styles for runner canvas dialogue

src/app/app.css

@@ -42,7 +42,8 @@ body {
 }
 
 button,
-input {
+input,
+textarea {
   font: inherit;
 }
 
@@ -1666,6 +1667,56 @@ button:disabled {
   font-size: 0.78rem;
 }
 
+.runner-canvas__dialogue {
+  position: absolute;
+  left: 50%;
+  bottom: 22px;
+  z-index: 5;
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+  width: min(560px, calc(100% - 32px));
+  padding: 16px 18px;
+  color: #f6efe5;
+  background: rgba(8, 10, 14, 0.94);
+  border: 1px solid rgba(255, 255, 255, 0.14);
+  border-radius: 18px;
+  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.24);
+  transform: translateX(-50%);
+  backdrop-filter: blur(12px);
+}
+
+.runner-canvas__dialogue-title {
+  color: #e8ddcf;
+  font-size: 0.72rem;
+  font-weight: 700;
+  letter-spacing: 0.14em;
+  text-transform: uppercase;
+}
+
+.runner-canvas__dialogue-speaker {
+  color: var(--color-accent-strong);
+  font-size: 0.92rem;
+  font-weight: 700;
+}
+
+.runner-canvas__dialogue-text {
+  font-size: 1rem;
+  line-height: 1.6;
+  white-space: pre-wrap;
+}
+
+.runner-canvas__dialogue-meta {
+  color: rgba(246, 239, 229, 0.76);
+  font-size: 0.78rem;
+}
+
+.runner-canvas__dialogue-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 8px;
+}
+
 .status-bar {
   display: flex;
   align-items: center;