diff --git a/README.md b/README.md
index 87e6c56..8e04e41 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,19 @@
 # nxdns
 
-A self-hosted DNS sinkhole for a household LAN, written in Zig 0.16. One
-static musl binary, SQLite for state, a Raspberry Pi 5 as the reference
-target. It answers your network's DNS, blocks what you tell it to, and shows
-you what asked for what.
+nxdns is a DNS sinkhole for your LAN. It blocks the names you do not want, and
+forwards the rest over an encrypted connection.
+
+```mermaid
+flowchart LR
+    devices["Your devices"] -- "DNS query" --> nxdns["nxdns"]
+    nxdns -- "answer" --> devices
+    nxdns -- "allowed" --> upstream["Upstream resolvers<br/>DoH / DoT"]
+    upstream -- "answer" --> nxdns
+    nxdns -- "blocked" --> sink["0.0.0.0 / NXDOMAIN"]
+```
+
+One static Zig binary. SQLite holds the state and the query log, which the web
+UI, the REST API and `/metrics` read.
 
 ## Features
 
diff --git a/web/src/features/blocklists/BlocklistsPage.tsx b/web/src/features/blocklists/BlocklistsPage.tsx
index 13970a6..b194762 100644
--- a/web/src/features/blocklists/BlocklistsPage.tsx
+++ b/web/src/features/blocklists/BlocklistsPage.tsx
@@ -79,17 +79,6 @@ const styles = stylex.create({
 	dimWhenDisabled: {
 		opacity: { default: 1, ":disabled": 0.5 },
 	},
-	srOnly: {
-		position: "absolute",
-		width: 1,
-		height: 1,
-		padding: 0,
-		margin: -1,
-		overflow: "hidden",
-		clipPath: "inset(50%)",
-		whiteSpace: "nowrap",
-		borderWidth: 0,
-	},
 });
 
 export default function BlocklistsPage() {
@@ -170,7 +159,7 @@ export default function BlocklistsPage() {
 								<th {...stylex.props(shared.th)}>Skipped regex</th>
 								<th {...stylex.props(shared.th)}>Last updated</th>
 								<th {...stylex.props(shared.th)}>
-									<span {...stylex.props(styles.srOnly)}>Actions</span>
+									<span {...stylex.props(shared.srOnly)}>Actions</span>
 								</th>
 							</tr>
 						</thead>
diff --git a/web/src/features/clients/ClientsPage.tsx b/web/src/features/clients/ClientsPage.tsx
index 9b760b7..1fa5dd3 100644
--- a/web/src/features/clients/ClientsPage.tsx
+++ b/web/src/features/clients/ClientsPage.tsx
@@ -96,17 +96,6 @@ const styles = stylex.create({
 	 * The accessible name of the actions column, kept out of the visual table
 	 * without leaving the accessibility tree.
 	 */
-	srOnly: {
-		position: "absolute",
-		width: 1,
-		height: 1,
-		padding: 0,
-		margin: -1,
-		overflow: "hidden",
-		clipPath: "inset(50%)",
-		whiteSpace: "nowrap",
-		borderWidth: 0,
-	},
 });
 
 export default function ClientsPage() {
@@ -138,7 +127,7 @@ export default function ClientsPage() {
 								<th {...stylex.props(styles.cell)}>First seen</th>
 								<th {...stylex.props(styles.cell)}>Last seen</th>
 								<th {...stylex.props(styles.cell)}>
-									<span {...stylex.props(styles.srOnly)}>Actions</span>
+									<span {...stylex.props(shared.srOnly)}>Actions</span>
 								</th>
 							</tr>
 						</thead>
diff --git a/web/src/features/local/RecordsTab.tsx b/web/src/features/local/RecordsTab.tsx
index 667095d..97cc588 100644
--- a/web/src/features/local/RecordsTab.tsx
+++ b/web/src/features/local/RecordsTab.tsx
@@ -91,17 +91,6 @@ const styles = stylex.create({
 	dimWhenDisabled: {
 		opacity: { default: 1, ":disabled": 0.5 },
 	},
-	srOnly: {
-		position: "absolute",
-		width: 1,
-		height: 1,
-		padding: 0,
-		margin: -1,
-		overflow: "hidden",
-		clipPath: "inset(50%)",
-		whiteSpace: "nowrap",
-		borderWidth: 0,
-	},
 });
 
 function RecordForm({
@@ -268,7 +257,7 @@ export default function RecordsTab() {
 								TTL
 							</th>
 							<th scope="col" {...stylex.props(styles.headCellLast)}>
-								<span {...stylex.props(styles.srOnly)}>Actions</span>
+								<span {...stylex.props(shared.srOnly)}>Actions</span>
 							</th>
 						</tr>
 					</thead>
diff --git a/web/src/features/local/ZonesTab.tsx b/web/src/features/local/ZonesTab.tsx
index 94505b6..eefb36c 100644
--- a/web/src/features/local/ZonesTab.tsx
+++ b/web/src/features/local/ZonesTab.tsx
@@ -87,17 +87,6 @@ const styles = stylex.create({
 	dimWhenDisabled: {
 		opacity: { default: 1, ":disabled": 0.5 },
 	},
-	srOnly: {
-		position: "absolute",
-		width: 1,
-		height: 1,
-		padding: 0,
-		margin: -1,
-		overflow: "hidden",
-		clipPath: "inset(50%)",
-		whiteSpace: "nowrap",
-		borderWidth: 0,
-	},
 });
 
 function ZoneForm({
@@ -232,7 +221,7 @@ export default function ZonesTab() {
 								Resolver
 							</th>
 							<th scope="col" {...stylex.props(styles.headCellLast)}>
-								<span {...stylex.props(styles.srOnly)}>Actions</span>
+								<span {...stylex.props(shared.srOnly)}>Actions</span>
 							</th>
 						</tr>
 					</thead>
diff --git a/web/src/features/rules/RulesPage.tsx b/web/src/features/rules/RulesPage.tsx
index e6ce456..6946610 100644
--- a/web/src/features/rules/RulesPage.tsx
+++ b/web/src/features/rules/RulesPage.tsx
@@ -78,17 +78,6 @@ const styles = stylex.create({
 	submitRow: {
 		display: "flex",
 	},
-	srOnly: {
-		position: "absolute",
-		width: 1,
-		height: 1,
-		padding: 0,
-		margin: -1,
-		overflow: "hidden",
-		clipPath: "inset(50%)",
-		whiteSpace: "nowrap",
-		borderWidth: 0,
-	},
 });
 
 export default function RulesPage() {
@@ -137,7 +126,7 @@ export default function RulesPage() {
 								<th {...stylex.props(shared.th)}>Group</th>
 								<th {...stylex.props(shared.th)}>Created</th>
 								<th {...stylex.props(shared.th)}>
-									<span {...stylex.props(styles.srOnly)}>Actions</span>
+									<span {...stylex.props(shared.srOnly)}>Actions</span>
 								</th>
 							</tr>
 						</thead>
diff --git a/web/src/features/upstreams/UpstreamsPage.tsx b/web/src/features/upstreams/UpstreamsPage.tsx
index ae4abba..4af34f1 100644
--- a/web/src/features/upstreams/UpstreamsPage.tsx
+++ b/web/src/features/upstreams/UpstreamsPage.tsx
@@ -53,17 +53,6 @@ const styles = stylex.create({
 	dimWhenDisabled: {
 		opacity: { default: 1, ":disabled": 0.5 },
 	},
-	srOnly: {
-		position: "absolute",
-		width: 1,
-		height: 1,
-		padding: 0,
-		margin: -1,
-		overflow: "hidden",
-		clipPath: "inset(50%)",
-		whiteSpace: "nowrap",
-		borderWidth: 0,
-	},
 });
 
 export default function UpstreamsPage() {
@@ -127,7 +116,7 @@ export default function UpstreamsPage() {
 								<th {...stylex.props(shared.th)}>Enabled</th>
 								<th {...stylex.props(shared.th)}>TLS name</th>
 								<th {...stylex.props(shared.th)}>
-									<span {...stylex.props(styles.srOnly)}>Actions</span>
+									<span {...stylex.props(shared.srOnly)}>Actions</span>
 								</th>
 							</tr>
 						</thead>
diff --git a/web/src/ui/styles.ts b/web/src/ui/styles.ts
index 6046d31..b48971a 100644
--- a/web/src/ui/styles.ts
+++ b/web/src/ui/styles.ts
@@ -151,6 +151,19 @@ export const styles = stylex.create({
 		color: colors.dangerText,
 	},
 
+	/** Visible to a screen reader only; the element keeps its place in the a11y tree. */
+	srOnly: {
+		position: "absolute",
+		width: 1,
+		height: 1,
+		padding: 0,
+		margin: -1,
+		overflow: "hidden",
+		clipPath: "inset(50%)",
+		whiteSpace: "nowrap",
+		borderWidth: 0,
+	},
+
 	th: {
 		borderBottomWidth: 1,
 		borderBottomStyle: "solid",