Showed the culture a propaganda campaign drains

The simple economy pays for propaganda out of the nation's culture stock and lapses a campaign it can no longer fund, but the tab quoted money and never named the store. Give culture the clapperboard icon as a non-tradeable resource like research, read the stock and the campaigns' daily drain out on the Propaganda tab, and price every campaign figure in culture when the simple economy runs.

client/assets/icon_culture.svg

@@ -0,0 +1 @@
+<svg style="height: 512px; width: 512px;" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M2 2h508v508H2z" fill="#000000" fill-opacity="1" stroke="#000000" stroke-opacity="1" stroke-width="2"></path><g class="" style="" transform="translate(0,0)"><path d="m419.682 26.2-8.66 2.452L32.915 135.81 55.27 214.7l386.77-109.608L419.683 26.2zm-12.41 22.224 9.074 32.014-41.086-22.942 32.013-9.072zM350.77 64.438l56.8 31.714-37.084 10.51-56.8-31.715 37.084-10.51zm-61.577 17.45 56.803 31.716-37.084 10.51-56.8-31.718 37.08-10.51zm-61.574 17.45 56.802 31.715-37.084 10.51-56.803-31.715 37.084-10.51zm-61.577 17.45 56.803 31.716-37.084 10.51-56.8-31.717 37.08-10.51zm-61.574 17.45 56.8 31.715-37.083 10.51-56.802-31.715 37.084-10.51zm-45.86 26.227 41.085 22.94-32.01 9.072-9.074-32.012zM55 215v274h402V215H55zm18 18h33.273L73 266.273V233zm58.727 0h38.546l-46 46H85.727l46-46zm64 0h38.546l-46 46h-38.546l46-46zm64 0h38.546l-46 46h-38.546l46-46zm64 0h38.546l-46 46h-38.546l46-46zm64 0h38.546l-46 46h-38.546l46-46zM439 245.727V279h-33.273L439 245.727zM73 297h366v174H73V297zm248.635 46.57-192.44.703.067 18 192.44-.703-.067-18zM130.7 391.33l-.134 17.998 92.707.703.137-18-92.71-.7zm127.155.7-.2 18 63.913.702.2-17.998-63.913-.703z" fill="#9013fe" fill-opacity="1"></path></g></svg>

client/css/style.css

@@ -2263,6 +2263,9 @@ input:focus, select:focus { border-color: var(--accent); }
   padding: 4px 6px;
 }
 .politics-readout { color: var(--muted); font-size: 12px; margin-left: 8px; }
+.politics-card .res { display: inline; white-space: nowrap; }
+.politics-card .res img { width: 13px; height: 13px; vertical-align: -2px; margin-right: 3px; }
+.culture-readout { margin-left: 0; font-size: 13px; }
 .politics-policy {
   padding: 8px 0;
   border-top: 1px solid rgba(255, 255, 255, 0.07);

client/js/devlog_data.js

@@ -1,6 +1,12 @@
 // Generated by scripts/generate-devlog.js from `git log`; do not edit.
 // The pre-commit hook refreshes it so the main menu shows the latest commits.
 export const DEVLOG = [
+  {
+    "hash": "9fc94a8",
+    "date": "2026-09-28",
+    "subject": "Rebuilt the technology panel as one lane-routed draggable graph",
+    "body": ""
+  },
   {
     "hash": "3c737e9",
     "date": "2026-09-28",
@@ -54,11 +60,5 @@ export const DEVLOG = [
     "date": "2026-09-24",
     "subject": "Made training gather materials, fixed the trade graph, and banked money gifts",
     "body": "Unit orders now gather steel and high-tech over the days before training, exactly as buildings do, and clicking a queued order reveals what it is gathering, its reserved budget and the soldiers it will draw.\n\nThe trade graph cached a producer-less node list under a stamp that already reflected the producers' stores, so every seeded mine stayed invisible to buyers and rare-good prices settled at a huge multiple of base; the storage nodes are now re-read after production.\n\nMoney gifts draw the giver's central-bank reserves in the denomination first, buy the rest from the issuing bank at the market rate, convert into the receiver's currency, and cannot buy from a bank their nation is at war with.\n\nPruned the finished design briefs (intelligence, stacks, air movement, politics performance, economy balance, training UI and FIXME) and refreshed the index and cross-references."
-  },
-  {
-    "hash": "afb23df",
-    "date": "2026-09-24",
-    "subject": "Cut the migration sweep's repeated lookups and population churn",
-    "body": ""
   }
 ];

client/js/game_screen/panels.js

@@ -2744,6 +2744,10 @@ export const panelMethods = {
       localCiv,
       totalHours: snapshot.totalHours || 0,
       campaigns: snapshot.campaigns || [],
+      // The nation's culture stock, which the simple economy spends on the
+      // campaigns, and the model that decides which currency they are paid in.
+      culture: snapshot.culture || [],
+      economyModel: this.economyModel,
       opinions: snapshot.opinions || { ethnic: [], government: [] },
       spies: (snapshot.units || [])
         .filter((unit) => unit.civ === localCiv && this._isSpy(unit))

client/js/modals/nation.js

@@ -16,6 +16,7 @@ import {
   MARKET_LOTS,
   resourceById,
   PRICE_INDEX_WINDOW_DAYS,
+  SIMPLE_ECONOMY,
   TREATIES,
   treatyById,
 } from "../../../shared/data.js";
@@ -24,7 +25,7 @@ import { renderMonthlyBudget } from "./budget.js";
 import { effectNodes, money, quotedMoney } from "./format.js";
 import { bindTabs } from "./tabs.js";
 import { ethnicityChart } from "../ui/ethnicity.js";
-import { researchNode } from "../ui/card.js";
+import { cultureNode, researchNode } from "../ui/card.js";
 import { TechnologyTreeView } from "../ui/tech_tree_view.js";
 import { resourceNode, valueNode } from "../ui/value.js";
 import { lineChart } from "../ui/line_chart.js";
@@ -2097,6 +2098,7 @@ export class NationModal {
     this._spyRows = new Map();
     this._reportsSignature = null;
     this.$intelligenceSpies = $("<div class='politics-card'></div>");
+    this.$intelligenceCulture = $("<div class='politics-card'></div>");
     this.$intelligenceCampaigns = $("<div class='politics-card'></div>");
     this.$intelligenceSpyView.append(
       this._buildSpiesCard(),
@@ -2104,6 +2106,7 @@ export class NationModal {
       this._buildSatellitesCard()
     );
     this.$intelligencePropagandaView.append(
+      this._buildCultureCard(),
       this.$intelligenceCampaigns,
       this._buildCampaignForm(civs)
     );
@@ -2114,6 +2117,7 @@ export class NationModal {
     this.$intelligenceSub.text(
       "Your spies and the propaganda campaigns they serve."
     );
+    this._fillCulture(info, localCiv);
     this._fillSpies(info, localCiv);
     this._fillReports(info);
     this._fillSatellites(info);
@@ -2122,6 +2126,42 @@ export class NationModal {
     this._syncCampaignForm();
   }
 
+  // The culture readout: the simple economy funds propaganda from the culture
+  // stock, so the tab names the store and what the running campaigns drain from
+  // it each day. The hard economy pays campaigns from the treasury instead, so
+  // only the stock (soft power) is worth naming there.
+  _buildCultureCard() {
+    const $card = this.$intelligenceCulture;
+    $card.empty();
+    $card.append($("<div class='name'></div>").text("Culture"));
+    const $desc = $("<div class='desc'></div>").text(
+      this._campaignPaidInCulture()
+        ? "Propaganda is paid for in culture, drained from this store each day; a " +
+            "campaign lapses when there is too little left to fund it."
+        : "Your stock of soft power. Campaigns are funded from the treasury."
+    );
+    this.$cultureReadout = $("<div class='politics-readout culture-readout'></div>");
+    $card.append($desc, this.$cultureReadout);
+    return $card;
+  }
+
+  _fillCulture(info, localCiv) {
+    if (!this.$cultureReadout || !this.$cultureReadout.length) return;
+    const culture = (info.culture && info.culture[localCiv]) || 0;
+    const upkeep = (info.campaigns || [])
+      .filter((campaign) => campaign.civ === localCiv)
+      .reduce((sum, campaign) => sum + (campaign.hourlyCost || 0), 0);
+    const $readout = this.$cultureReadout.empty().append(cultureNode(culture));
+    if (this._campaignPaidInCulture()) {
+      $readout
+        .append(document.createTextNode(" culture   ·   Campaigns consume "))
+        .append(cultureNode(upkeep * HOURS_PER_DAY))
+        .append(document.createTextNode("/day"));
+    } else {
+      $readout.append(document.createTextNode(" culture"));
+    }
+  }
+
   // The spy roster: one row per spy in the field, with a Locate button that
   // selects it and brings the map to it. Rows are only rebuilt when the roster
   // (or a spy's whereabouts) changes, so an arriving snapshot does not yank a
@@ -2336,19 +2376,51 @@ export class NationModal {
     }
     for (const campaign of campaigns) {
       const row = this._campaignRows.get(campaign.id);
-      if (row) row.$cost.text(this._campaignCostText(info, campaign));
+      if (row) row.$cost.empty().append(this._campaignCostNode(info, campaign));
     }
   }
 
-  _campaignCostText(info, campaign) {
+  // Which currency propaganda is funded from: the simple economy drains the
+  // culture stock, the hard economy the treasury. The two models also price a
+  // campaign with their own figures, so the slider bounds come from here too.
+  _campaignPaidInCulture() {
+    return this.economyModel === "simple";
+  }
+
+  _campaignDefaultCost() {
+    return this._campaignPaidInCulture()
+      ? SIMPLE_ECONOMY.campaign.defaultCulturePerHour
+      : PROPAGANDA.defaultHourlyCost;
+  }
+
+  _campaignMaxCost() {
+    return this._campaignPaidInCulture()
+      ? SIMPLE_ECONOMY.campaign.maxCulturePerHour
+      : PROPAGANDA.maxHourlyCost;
+  }
+
+  // A campaign figure in its own currency: culture points with the clapperboard
+  // icon in the simple economy, quoted euros in the hard one. `amount` is
+  // already scaled to the period being shown.
+  _campaignAmountNode(amount) {
+    if (this._campaignPaidInCulture()) return cultureNode(amount);
+    return document.createTextNode(
+      `${currencySymbol()}${groupDigits(Math.round(this._quoted(amount)))}`
+    );
+  }
+
+  _campaignCostNode(info, campaign) {
     const hourly = campaign.hourlyCost || 0;
     const activeHours = Math.max(0, (info.totalHours || 0) - (campaign.startedHours || 0));
     const spent = hourly * activeHours;
     const days = Math.floor(activeHours / HOURS_PER_DAY);
-    return (
-      `${currencySymbol()}${groupDigits(Math.round(this._quoted(hourly) * HOURS_PER_DAY))}/day  ·  ${currencySymbol()}${groupDigits(Math.round(spent))} spent over ` +
-      `${days} day${days === 1 ? "" : "s"}`
-    );
+    const $cost = $("<span class='politics-campaign-cost'></span>");
+    $cost
+      .append(this._campaignAmountNode(hourly * HOURS_PER_DAY))
+      .append(document.createTextNode("/day  ·  "))
+      .append(this._campaignAmountNode(spent))
+      .append(document.createTextNode(` spent over ${days} day${days === 1 ? "" : "s"}`));
+    return $cost;
   }
 
   _buildCampaignRow(info, localCiv, campaign) {
@@ -2369,30 +2441,32 @@ export class NationModal {
     if (campaign.civ === localCiv) {
       const $slider = $("<input type='range' class='politics-slider'>").attr({
         min: 0,
-        max: PROPAGANDA.maxHourlyCost,
-        step: 1000,
+        max: this._campaignMaxCost(),
+        step: this._campaignPaidInCulture() ? 1 : 1000,
         value: campaign.hourlyCost,
       });
-      const $spend = $("<span class='politics-readout'></span>").text(
-        `${currencySymbol()}${groupDigits(Math.round(this._quoted(campaign.hourlyCost) * HOURS_PER_DAY))}/day`
-      );
-      $slider.on("input", () =>
-        $spend.text(
-          `${currencySymbol()}${groupDigits(Math.round(this._quoted(Number($slider.val())) * HOURS_PER_DAY))}/day`
-        )
-      );
+      const spendNode = (hourly) =>
+        $("<span class='politics-readout'></span>")
+          .append(this._campaignAmountNode(hourly * HOURS_PER_DAY))
+          .append(document.createTextNode("/day"));
+      let $spend = spendNode(campaign.hourlyCost);
+      $slider.on("input", () => {
+        const next = spendNode(Number($slider.val()));
+        $spend.replaceWith(next);
+        $spend = next;
+      });
       $slider.on("change", () => {
         const amount = Number($slider.val());
         if (amount <= 0) {
           // Reverting to the last known spend keeps the control honest until
           // the player confirms the stop.
           $slider.val(campaign.hourlyCost);
-          $spend.text(
-            `${currencySymbol()}${groupDigits(Math.round(this._quoted(campaign.hourlyCost) * HOURS_PER_DAY))}/day`
-          );
+          const next = spendNode(campaign.hourlyCost);
+          $spend.replaceWith(next);
+          $spend = next;
           this.onConfirm(
             "Stop this campaign?",
-            `Cutting the spending to ${currencySymbol()}0 will stop the campaign.`,
+            `Cutting the spending to ${this._campaignPaidInCulture() ? "0 culture" : `${currencySymbol()}0`} will stop the campaign.`,
             () => this.onCancelCampaign(campaign.id)
           );
         } else {
@@ -2422,17 +2496,21 @@ export class NationModal {
     $card.append($("<div class='name'></div>").text("Launch a propaganda campaign"));
     $card.append(
       $("<div class='desc'></div>").text(
-        "Spend money to warm or cool a population's view of another people or government. " +
-          "Your cultural impact decides how strongly the message lands, and the last " +
-          "few popularity points are the hardest to win."
+        `Spend ${this._campaignPaidInCulture() ? "culture" : "money"} to warm or cool a ` +
+          "population's view of another people or government. Your cultural impact " +
+          "decides how strongly the message lands, and the last few popularity points " +
+          "are the hardest to win."
       )
     );
-    $card.append(
-      $("<div class='desc politics-cost'></div>").text(
-        `Costs ${currencySymbol()}${groupDigits(Math.round(this._quoted(PROPAGANDA.defaultHourlyCost) * HOURS_PER_DAY))}/day to begin; ` +
-          "adjust the spending on an active campaign to make it land harder or softer."
+    const $beginCost = $("<div class='desc politics-cost'></div>").append(
+      document.createTextNode("Costs "),
+      this._campaignAmountNode(this._campaignDefaultCost() * HOURS_PER_DAY),
+      document.createTextNode(
+        "/day to begin; adjust the spending on an active campaign to make it land " +
+          "harder or softer."
       )
     );
+    $card.append($beginCost);
     const $observer = this._civSelect(civs, campaign.observer);
     const $kind = $("<select class='politics-select'></select>").append(
       $("<option value='government'></option>").text("their government"),

client/js/ui/card.js

@@ -47,6 +47,22 @@ export function researchNode(amount, { sign = "", decimals = 0 } = {}) {
   return $span;
 }
 
+// A culture-point figure with its clapperboard icon, standing in for the word
+// "culture" the way the erlenmeyer stands in for research. The simple economy
+// spends culture on propaganda, so the campaign panels read with the same
+// grammar as the research figures.
+export function cultureNode(amount, { sign = "", decimals = 0 } = {}) {
+  const proto = resourceById("culture");
+  const $span = $("<span class='res culture-points'></span>");
+  if (proto) {
+    $span.append($("<img>").attr("src", `assets/${proto.icon}`).attr("alt", proto.name));
+  }
+  const value = Number(amount) || 0;
+  const text = decimals > 0 ? value.toFixed(decimals) : groupDigits(Math.round(value));
+  $span.append(document.createTextNode(`${sign}${text}`));
+  return $span;
+}
+
 // An inline resource bill for a card: a muted label, then one icon-and-amount
 // per material, then an optional suffix. Used for a unit's daily upkeep, which
 // is paid in materials rather than money.

shared/data/resources.js

@@ -108,8 +108,22 @@ export const RESEARCH = {
   colour: "#a142b6",
 };
 
+// Culture is the nation's store of soft power: produced by its cultural
+// buildings and spent, in the simple economy, on propaganda campaigns. Like
+// research it is a special resource -- it has no market, no stockpile tile and
+// never moves -- so it is kept out of the tradeable catalogue and shown only
+// with its clapperboard icon.
+export const CULTURE = {
+  id: "culture",
+  name: "Culture",
+  unit: "",
+  icon: "icon_culture.svg",
+  colour: "#9a7bff",
+};
+
 export function resourceById(id) {
   if (id === RESEARCH.id) return RESEARCH;
+  if (id === CULTURE.id) return CULTURE;
   return RESOURCES[RESOURCE_INDEX[id]] || null;
 }
 

tests/game_screen_test.js

@@ -7,7 +7,7 @@ import { compact, groupDigits } from "../shared/text_format.js";
 import { tileImprovementResourceCost } from "../shared/resources.js";
 import { quotedBuildCost, marketPricesFrom } from "../client/js/modals/format.js";
 import { parseKey } from "../shared/hex.js";
-import { smallState, adjacentLand, grantBuilding, stripPorts } from "./framework/helpers.js";
+import { smallState, simpleState, adjacentLand, grantBuilding, stripPorts } from "./framework/helpers.js";
 
 function stubNetwork() {
   return {
@@ -1598,6 +1598,37 @@ export class GameScreenTest extends TestCase {
     }
   }
 
+  async test_propaganda_tab_shows_the_culture_drain() {
+    const env = await setupDom();
+    try {
+      const state = simpleState();
+      state.culture.set(0, 12_345);
+      state.requestCampaign(0, 0, "government", 1, 1);
+      const screen = new GameScreen(stubNetwork(), makeConfig());
+      screen.enter();
+      screen.onState(state.snapshot(0));
+
+      env.$("#civ-flag").click();
+      env.$("#modal-nation .tab[data-tab='intelligence']").click();
+      showIntelligenceSubtab(env, "Propaganda");
+
+      const $culture = env.$("#intelligence-propaganda-view .culture-readout");
+      this.assertSize($culture, 1, "the propaganda tab reads out the culture stock");
+      this.assertTrue($culture.text().includes("12\u00a0345"), "it names the current culture");
+      this.assertTrue($culture.text().includes("192"), "and what the campaigns consume");
+      const src = $culture.find("img").first().attr("src");
+      this.assertTrue(/icon_culture\.svg$/.test(src || ""), "with the culture icon");
+
+      const $cost = env.$("#intelligence-propaganda-view .politics-campaign-cost");
+      this.assertSize($cost, 1, "the running campaign reports its cost");
+      this.assertGreater($cost.find("img").length, 0, "in culture points");
+      this.assertFalse($cost.text().includes("\u20ac"), "not in money");
+      screen.leave();
+    } finally {
+      teardownDom(env);
+    }
+  }
+
   async test_politics_tab_sends_campaign_and_policy_orders() {
     const env = await setupDom();
     try {