Add browser match controls

browser/extension/style.css

@@ -177,7 +177,8 @@ label {
 }
 
 input,
-textarea {
+textarea,
+select {
   width: 100%;
   padding: 10px 12px;
   border: 1px solid var(--line);
@@ -187,6 +188,33 @@ textarea {
   font: inherit;
 }
 
+fieldset {
+  margin: 0;
+  padding: 12px;
+  border: 1px solid var(--line);
+  border-radius: 12px;
+  display: grid;
+  gap: 12px;
+}
+
+legend {
+  padding: 0 6px;
+  color: var(--ink-soft);
+  font-size: 12px;
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+}
+
+.checkbox-row {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.checkbox-row input {
+  width: auto;
+}
+
 button,
 .link-button {
   padding: 10px 14px;