diff --git a/client/src/HouseRules.css b/client/src/HouseRules.css
index 576660b..e88fde7 100644
--- a/client/src/HouseRules.css
+++ b/client/src/HouseRules.css
@@ -1,26 +1,4 @@
-.HouseRules {
-  display: flex;
-  position: absolute;
-  left: 0;
-  right: 30rem;
-  bottom: 0;
-  top: 0;
-  justify-content: center;
-  align-items: center;
-  background: rgba(0,0,0,0.5);
-  z-index: 1000;
-  max-height: 100vh;
-  overflow: auto;
-}
 
-.HouseRules > * {
-  max-height: calc(100vh - 2em);
-  overflow: auto;
-  margin: 0.5em;
-  width: 40em;
-  display: inline-flex;
-  flex-direction: column;
-}
 
 .HouseRules .HouseSelector {
   display: flex;
diff --git a/client/src/HouseRules.tsx b/client/src/HouseRules.tsx
index 47f299b..f260a22 100644
--- a/client/src/HouseRules.tsx
+++ b/client/src/HouseRules.tsx
@@ -1,14 +1,22 @@
-import React, { useState, useEffect, useContext, useRef, useMemo, useCallback } from "react";
+import React, {
+  useState,
+  useEffect,
+  useContext,
+  useRef,
+  useMemo,
+  useCallback,
+} from "react";
 import equal from "fast-deep-equal";
 
 import Paper from "@mui/material/Paper";
 import Button from "@mui/material/Button";
 import Switch from "@mui/material/Switch";
 
-import "./HouseRules.css";
+// import "./HouseRules.css";
 
 import { GlobalContext } from "./GlobalContext";
 import { Placard } from "./Placard";
+import { Box } from "@mui/material";
 
 /* eslint-disable @typescript-eslint/no-explicit-any */
 
@@ -25,8 +33,12 @@ const Volcano: React.FC<VolcanoProps> = ({ ws, rules, field, disabled }) => {
     Math.random() > 0.5
       ? Math.floor(8 + Math.random() * 5) /* Do not include 7 */
       : Math.floor(2 + Math.random() * 5); /* Do not include 7 */
-  const [number, setNumber] = useState<number>(field in rules && "number" in rules[field] ? rules[field].number : init);
-  const [gold, setGold] = useState<boolean>(field in rules && "gold" in rules[field] ? rules[field].gold : false);
+  const [number, setNumber] = useState<number>(
+    field in rules && "number" in rules[field] ? rules[field].number : init
+  );
+  const [gold, setGold] = useState<boolean>(
+    field in rules && "gold" in rules[field] ? rules[field].gold : false
+  );
 
   console.log(`house-rules - ${field} - `, rules[field]);
 
@@ -93,16 +105,21 @@ const Volcano: React.FC<VolcanoProps> = ({ ws, rules, field, disabled }) => {
   return (
     <div className="Volcano">
       <div>
-        The Volcano replaces the Desert. When the Volcano erupts, roll a die to determine the direction the lava will
-        flow. One of the six intersections on the Volcano tile will be affected. If there is a settlement on the selected
-        intersection, it is destroyed!
+        The Volcano replaces the Desert. When the Volcano erupts, roll a die to
+        determine the direction the lava will flow. One of the six intersections
+        on the Volcano tile will be affected. If there is a settlement on the
+        selected intersection, it is destroyed!
       </div>
       <div>
-        Remove it from the board (its owner may rebuild it later). If a city is located there, it is reduced to a
-        settlement! Replace the city with a settlement of its owner&apos;s color. If he has no settlements remaining, the
-        city is destroyed instead.
+        Remove it from the board (its owner may rebuild it later). If a city is
+        located there, it is reduced to a settlement! Replace the city with a
+        settlement of its owner&apos;s color. If he has no settlements
+        remaining, the city is destroyed instead.
+      </div>
+      <div>
+        The presence of the Robber on the Volcano does not prevent the Volcano
+        from erupting.
       </div>
-      <div>The presence of the Robber on the Volcano does not prevent the Volcano from erupting.</div>
       <div>
         Roll {number} and the Volcano erupts!
         <button onClick={() => update(+1)}>up</button>&nbsp;/&nbsp;
@@ -110,20 +127,30 @@ const Volcano: React.FC<VolcanoProps> = ({ ws, rules, field, disabled }) => {
       </div>
       <div className="HouseSelector">
         <div>
-          <b>Volcanoes have gold!</b>: Volcano can produce resources when its number is rolled.
+          <b>Volcanoes have gold!</b>: Volcano can produce resources when its
+          number is rolled.
         </div>
         <div>
-          <Switch size={"small"} className="RuleSwitch" checked={gold} onChange={() => toggleGold()} {...{ disabled }} />
+          <Switch
+            size={"small"}
+            className="RuleSwitch"
+            checked={gold}
+            onChange={() => toggleGold()}
+            {...{ disabled }}
+          />
         </div>
       </div>
       <div>
-        Volcanoes tend to be rich in valuable minerals such as gold or gems. Each settlement that is adjacent to the
-        Volcano when it erupts may produce any one of the five resources it&apos;s owner desires.
+        Volcanoes tend to be rich in valuable minerals such as gold or gems.
+        Each settlement that is adjacent to the Volcano when it erupts may
+        produce any one of the five resources it&apos;s owner desires.
       </div>
       <div>
-        Each city adjacent to the Volcano may produce any two resources. This resource production is taken before the
-        results of the volcano eruption are resolved. Note that while the Robber can not prevent the Volcano from
-        erupting, he does prevent any player from producing resources from the Volcano hex if he has been placed there.
+        Each city adjacent to the Volcano may produce any two resources. This
+        resource production is taken before the results of the volcano eruption
+        are resolved. Note that while the Robber can not prevent the Volcano
+        from erupting, he does prevent any player from producing resources from
+        the Volcano hex if he has been placed there.
       </div>
     </div>
   );
@@ -186,8 +213,7 @@ const HouseRules: React.FC<HouseRulesProps> = ({ houseRulesActive }) => {
   const { ws, name } = useContext(GlobalContext);
   const [rules, setRules] = useState<any>({});
   const [state, setState] = useState<any>({});
-  const [gameState, setGameState] = useState<string>('');
-  const [ruleElements, setRuleElements] = useState<React.ReactElement[]>([]);
+  const [gameState, setGameState] = useState<string>("");
 
   const fields = useMemo(() => ["state", "rules"], []);
   const onWsMessage = (event: MessageEvent) => {
@@ -259,8 +285,8 @@ const HouseRules: React.FC<HouseRulesProps> = ({ houseRulesActive }) => {
     [rules, ws]
   );
 
-  useEffect(() => {
-    const ruleList = [
+  const ruleList = useMemo(
+    () => [
       {
         key: "volcano",
         label: "Volcanoes are a lava fun!",
@@ -268,7 +294,12 @@ const HouseRules: React.FC<HouseRulesProps> = ({ houseRulesActive }) => {
         category: "board",
         defaultChecked: false,
         element: (
-          <Volcano ws={ws} rules={rules} field={"volcano"} disabled={gameState !== 'lobby'} />
+          <Volcano
+            ws={ws}
+            rules={rules}
+            field={"volcano"}
+            disabled={gameState !== "lobby"}
+          />
         ),
       },
       {
@@ -277,20 +308,29 @@ const HouseRules: React.FC<HouseRulesProps> = ({ houseRulesActive }) => {
         description: "Customize how many Victory Points are required to win.",
         category: "rules",
         defaultChecked: false,
-        element: <VictoryPoints ws={ws} rules={rules} field={"victory-points"} />,
+        element: (
+          <VictoryPoints ws={ws} rules={rules} field={"victory-points"} />
+        ),
       },
       {
         key: "tiles-start-facing-down",
         label: "Tiles start facing down",
-        description: "Resource tiles start upside-down while placing starting settlements.",
+        description:
+          "Resource tiles start upside-down while placing starting settlements.",
         category: "board",
         defaultChecked: false,
-        element: <div>Once all players have placed their initial settlements and roads, the tiles are flipped and you discover what the resources are.</div>,
+        element: (
+          <div>
+            Once all players have placed their initial settlements and roads,
+            the tiles are flipped and you discover what the resources are.
+          </div>
+        ),
       },
       {
         key: "most-developed",
         label: "You are so developed",
-        description: "The player with the most development cards (more than 4) receives 2VP.",
+        description:
+          "The player with the most development cards (more than 4) receives 2VP.",
         category: "expansion",
         defaultChecked: false,
         element: <Placard type="most-developed" />,
@@ -298,17 +338,19 @@ const HouseRules: React.FC<HouseRulesProps> = ({ houseRulesActive }) => {
       {
         key: "port-of-call",
         label: "Another round of port",
-        description: "The player with the most harbor ports (more than 2) receives 2VP.",
+        description:
+          "The player with the most harbor ports (more than 2) receives 2VP.",
         category: "expansion",
         defaultChecked: false,
         element: <Placard type="port-of-call" />,
       },
       {
-            key: "slowest-turn",
-       label: "Why you play so slowf",
-       description: "The player with the longest turn idle time (longer than 2 minutes) so far loses 2VP.",
-       category: "expansion",
-      defaultChecked: false,
+        key: "slowest-turn",
+        label: "Why you play so slowf",
+        description:
+          "The player with the longest turn idle time (longer than 2 minutes) so far loses 2VP.",
+        category: "expansion",
+        defaultChecked: false,
         element: <Placard type="longest-turn" />,
       },
       {
@@ -317,7 +359,12 @@ const HouseRules: React.FC<HouseRulesProps> = ({ houseRulesActive }) => {
         description: "Roll again if you roll two of the same number.",
         category: "rolling",
         defaultChecked: false,
-        element: <div>If you roll doubles, players get those resources and then you must roll again.</div>,
+        element: (
+          <div>
+            If you roll doubles, players get those resources and then you must
+            roll again.
+          </div>
+        ),
       },
       {
         key: "twelve-and-two-are-synonyms",
@@ -325,63 +372,77 @@ const HouseRules: React.FC<HouseRulesProps> = ({ houseRulesActive }) => {
         description: "If twelve is rolled, two scores as well. And vice-versa.",
         category: "rolling",
         defaultChecked: false,
-        element: <div>If you roll a twelve or two, resources are triggered for both.</div>,
+        element: (
+          <div>
+            If you roll a twelve or two, resources are triggered for both.
+          </div>
+        ),
       },
       {
         key: "robin-hood-robber",
         label: "Robin Hood robber",
-        description: "Robbers can't steal from players with two or less victory points.",
+        description:
+          "Robbers can't steal from players with two or less victory points.",
         category: "rules",
         defaultChecked: false,
         element: <></>,
       },
-    ];
-
-    setRuleElements(
-      ruleList.map((item) => {
-        const defaultChecked = item.defaultChecked;
-        if (!(item.key in rules)) {
-          rules[item.key] = {
-            enabled: defaultChecked,
-          };
-        }
-        const checked = rules[item.key].enabled;
-        if (checked !== state[item.key]) {
-          setState({ ...state, [item.key]: checked });
-        }
-
-        return (
-          <div key={item.key} className="HouseSelector">
-            <div><b>{item.label}</b>: {item.description}</div>
-            <div>
-              <Switch
-                size={"small"}
-                className="RuleSwitch"
-                checked={checked}
-                id={item.key}
-                onChange={(e) => setRule(e, item.key)}
-                disabled={gameState !== 'lobby' || !name}
-              />
-            </div>
-            {checked && item.element}
-          </div>
-        );
-      })
-    );
-  }, [rules, setRules, setRuleElements, state, ws, setRule, name, gameState]);
+    ],
+    [rules, setRules, state, ws, setRule, name, gameState]
+  );
 
   if (!houseRulesActive) {
     return <></>;
   }
 
   return (
-    <div className="HouseRules">
-      <Paper>
-        <div className="Title">House Rules</div>
-        <div style={{ display: "flex", flexDirection: "column" }}>{ruleElements}</div>
-        <Button onClick={dismissClicked}>Close</Button>
-      </Paper>
-    </div>
+    <Paper
+      className="HouseRules"
+      sx={{
+        display: "flex",
+        flexDirection: "column",
+        justifyContent: "center",
+        alignItems: "center",
+        maxHeight: "100dvh",
+        overflow: "hidden",
+      }}
+    >
+      <Box className="Title">House Rules</Box>
+      <Box sx={{ display: "flex", flexDirection: "column" }}>
+        {ruleList.map((item) => {
+          const defaultChecked = item.defaultChecked;
+          if (!(item.key in rules)) {
+            rules[item.key] = {
+              enabled: defaultChecked,
+            };
+          }
+          const checked = rules[item.key].enabled;
+          if (checked !== state[item.key]) {
+            setState({ ...state, [item.key]: checked });
+          }
+
+          return (
+            <div key={item.key} className="HouseSelector">
+              <div>
+                <b>{item.label}</b>: {item.description}
+              </div>
+              <div>
+                <Switch
+                  size={"small"}
+                  className="RuleSwitch"
+                  checked={checked}
+                  id={item.key}
+                  onChange={(e) => setRule(e, item.key)}
+                  disabled={gameState !== "lobby" || !name}
+                />
+              </div>
+              {checked && item.element}
+            </div>
+          );
+        })}
+      </Box>
+      <Button onClick={dismissClicked}>Close</Button>
+    </Paper>
   );
 };