diff --git a/source/game/scenes/game_scene.cpp b/source/game/scenes/game_scene.cpp
index 9b46187..e96b37b 100644
--- a/source/game/scenes/game_scene.cpp
+++ b/source/game/scenes/game_scene.cpp
@@ -7,7 +7,6 @@
 #include <cstddef>
 #include <cstdint>
 #include <filesystem>
-#include <iostream>
 #include <iterator>
 #include <utility>
 #include <variant>
@@ -41,6 +40,7 @@
 #include "utils/defaults.hpp"
 #include "utils/defines.hpp"
 #include "utils/easing.hpp"
+#include "utils/log.hpp"
 
 namespace {
 
@@ -290,13 +290,12 @@ GameScene::GameScene(Config config)
     // re-emissions es filtren per estat per no re-entrar mai des d'una
     // transició ja en marxa.
     entity_manager_.getBus().subscribe("level_complete", [this](const Event& ev) {
-        std::cout << "[LEVEL COMPLETE] player_id=" << ev.player_id << '\n';
+        Log::info("LEVEL COMPLETE", "player_id={}", ev.player_id);
         if (state_ == RoomFsm::State::PLAYING) { setState(RoomFsm::State::ROOM_OUTRO); }
     });
     entity_manager_.getBus().subscribe("player_hit", [](const Event& ev) {
         const auto* dmg = std::get_if<int>(&ev.payload);
-        std::cout << "[PLAYER HIT] player_id=" << ev.player_id
-                  << " dmg=" << (dmg != nullptr ? *dmg : 0) << '\n';
+        Log::info("PLAYER HIT", "player_id={} dmg={}", ev.player_id, dmg != nullptr ? *dmg : 0);
     });
     // `player_killed` el publica un hazard letal (mòmia amb
     // `kills_outright`) després del `player_hit`. Aquí resolem el
@@ -556,8 +555,7 @@ void GameScene::loadRoom(const std::string& yaml_path) {
         hud_->setPyramidRoom(mgr.currentPyramid(), mgr.currentRoom());
     }
 
-    std::cout << "[ROOM] load " << yaml_path << ": entities reloaded, paint cleared, "
-              << ACTIVE_COUNT << " active player(s) disabled (awaiting spawn cinematic)\n";
+    Log::info("ROOM", "load {}: entities reloaded, paint cleared, {} active player(s) disabled (awaiting spawn cinematic)", yaml_path, ACTIVE_COUNT);
 }
 
 void GameScene::advanceToNextRoom() {
@@ -565,7 +563,7 @@ void GameScene::advanceToNextRoom() {
     if (!mgr.advance()) {
         // Política temporal mentre no hi haja pantalla de "Fi de joc":
         // arribar al final del levels.yaml fa loop a la primera sala.
-        std::cout << "[ROOM] final del levels.yaml — bucle a la primera sala\n";
+        Log::info("ROOM", "final del levels.yaml — bucle a la primera sala");
         mgr.restart();
     }
     loadRoom(mgr.currentPath());
@@ -576,9 +574,9 @@ void GameScene::enterRoomIntro() {
     // Anotem la transició al log si veníem d'un altre estat; si ja
     // estàvem a INTRO (cas típic d'un salt debug) també queda ben clar.
     if (state_ != RoomFsm::State::ROOM_INTRO) {
-        std::cout << "[ROOM] " << RoomFsm::stateName(state_) << " -> ROOM_INTRO\n";
+        Log::info("ROOM", "{} -> ROOM_INTRO", RoomFsm::stateName(state_));
     } else {
-        std::cout << "[ROOM] ROOM_INTRO restart (cinemàtica reiniciada)\n";
+        Log::info("ROOM", "ROOM_INTRO restart (cinemàtica reiniciada)");
     }
     state_ = RoomFsm::State::ROOM_INTRO;
     transition_ = {};
@@ -602,7 +600,7 @@ void GameScene::enterRoomIntro() {
 
     auto* audio = Audio::get();
     if (audio == nullptr) {
-        std::cout << "[ROOM] INTRO: Audio absent — sense música, timeline només contra text\n";
+        Log::warn("ROOM", "INTRO: Audio absent — sense música, timeline només contra text");
         return;
     }
     audio->stopMusic();
@@ -611,10 +609,9 @@ void GameScene::enterRoomIntro() {
     if (Audio::getMusicState() == Audio::MusicState::PLAYING) {
         const int DUR_MS = Audio::getMusicDurationMs("room_intro.ogg");
         transition_config_.intro_music_tail_ms = std::max(0, DUR_MS - TEXT_TOTAL_MS);
-        std::cout << "[ROOM] INTRO: música " << DUR_MS << " ms, music_tail "
-                  << transition_config_.intro_music_tail_ms << " ms\n";
+        Log::info("ROOM", "INTRO: música {} ms, music_tail {} ms", DUR_MS, transition_config_.intro_music_tail_ms);
     } else {
-        std::cout << "[ROOM] INTRO: música no arrencada — timeline només contra text\n";
+        Log::warn("ROOM", "INTRO: música no arrencada — timeline només contra text");
     }
 }
 
@@ -638,7 +635,7 @@ void GameScene::respawnPlayersInstant() {
     state_ = RoomFsm::State::PLAYING;
     intro_completed_ = true;
     transition_ = {};
-    std::cout << "[ROOM] post-editor: spawn instantani, estat -> PLAYING\n";
+    Log::info("ROOM", "post-editor: spawn instantani, estat -> PLAYING");
 }
 #endif
 
@@ -671,11 +668,11 @@ void GameScene::triggerPlayerSpawn(std::size_t slot_index) {
     // al YAML, l'arma queda buida i el LAND és sec igualment.
     players_[slot_index]->armNextLandReverb(transition_config_.intro_land_reverb_preset);
 
-    std::cout << "[ROOM] spawn cinematic P" << (slot_index + 1) << ": airborne entry\n";
+    Log::info("ROOM", "spawn cinematic P{}: airborne entry", slot_index + 1);
 }
 
 void GameScene::dispatchPlayerKilled(int player_id) {
-    std::cout << "[PLAYER KILLED] player_id=" << player_id << '\n';
+    Log::info("PLAYER KILLED", "player_id={}", player_id);
     const auto IT = std::ranges::find_if(players_, [player_id](const auto& p) {
         return p && p->getId() == player_id;
     });
@@ -713,7 +710,7 @@ void GameScene::spawnDuePlayers() {
 
 void GameScene::setState(RoomFsm::State new_state) {
     if (new_state == state_) { return; }
-    std::cout << "[ROOM] " << RoomFsm::stateName(state_) << " -> " << RoomFsm::stateName(new_state) << '\n';
+    Log::info("ROOM", "{} -> {}", RoomFsm::stateName(state_), RoomFsm::stateName(new_state));
     state_ = new_state;
     transition_ = {};
     // Reset defensiu dels flags de cicle quan tornem a INTRO via aquest
@@ -742,7 +739,7 @@ void GameScene::setState(RoomFsm::State new_state) {
         const int TEXT_TOTAL_MS = transition_config_.outro_text_enter_ms + transition_config_.outro_text_hold_ms + transition_config_.outro_text_exit_ms;
         transition_config_.outro_music_tail_ms = 0;
         if (audio == nullptr) {
-            std::cout << "[ROOM] OUTRO: Audio absent — sense música, timeline només contra text\n";
+            Log::warn("ROOM", "OUTRO: Audio absent — sense música, timeline només contra text");
         } else {
             audio->stopMusic();
             audio->setOnMusicEnded({});
@@ -750,10 +747,9 @@ void GameScene::setState(RoomFsm::State new_state) {
             if (Audio::getMusicState() == Audio::MusicState::PLAYING) {
                 const int DUR_MS = Audio::getMusicDurationMs("room_outro.ogg");
                 transition_config_.outro_music_tail_ms = std::max(0, DUR_MS - TEXT_TOTAL_MS);
-                std::cout << "[ROOM] OUTRO: música " << DUR_MS << " ms, music_tail "
-                          << transition_config_.outro_music_tail_ms << " ms\n";
+                Log::info("ROOM", "OUTRO: música {} ms, music_tail {} ms", DUR_MS, transition_config_.outro_music_tail_ms);
             } else {
-                std::cout << "[ROOM] OUTRO: música no arrencada — timeline només contra text\n";
+                Log::warn("ROOM", "OUTRO: música no arrencada — timeline només contra text");
             }
         }
     }
@@ -1075,7 +1071,7 @@ void GameScene::handlePauseInput() {
         pause_.curve = GOING_TO_PAUSE ? UiConfig::get().pauseEnterCurve() : UiConfig::get().pauseExitCurve();
         pause_.state = GOING_TO_PAUSE ? PauseState::ENTERING : PauseState::EXITING;
 
-        std::cout << "[PAUSE] " << (GOING_TO_PAUSE ? "entering" : "exiting") << " from_scale=" << pause_.from_scale << " duration_ms=" << pause_.duration_ms << '\n';
+        Log::info("PAUSE", "{} from_scale={} duration_ms={}", GOING_TO_PAUSE ? "entering" : "exiting", pause_.from_scale, pause_.duration_ms);
     }
 }
 
@@ -1212,7 +1208,7 @@ void GameScene::update(int delta_ms) {
     // (creuar → player_exited → level_complete → OUTRO) es manté.
     // Mateixos gates que el salt entre sales.
     if (pause_.state == PauseState::IDLE && !editor_.active() && detectOpenDoor()) {
-        std::cout << "[DEBUG] força obertura de la porta\n";
+        Log::info("DEBUG", "força obertura de la porta");
         entity_manager_.forceOpenDoor();
     }
 #endif
diff --git a/source/game/scenes/intro_scene.cpp b/source/game/scenes/intro_scene.cpp
index 0e28039..6e9bf54 100644
--- a/source/game/scenes/intro_scene.cpp
+++ b/source/game/scenes/intro_scene.cpp
@@ -4,7 +4,6 @@
 
 #include <algorithm>
 #include <cstdint>
-#include <iostream>
 #include <string>
 #include <utility>
 
@@ -20,13 +19,12 @@
 #include "game/scenes/scene_flow.hpp"
 #include "utils/defaults.hpp"
 #include "utils/defines.hpp"
+#include "utils/log.hpp"
 
 namespace {
 
     constexpr int NAME_Y_OFFSET = -8;
     constexpr int TIMER_Y_OFFSET = 8;
-    // TODO: migrar a un logger unificat quan es decideixi (veure INC-03 a
-    // docs/audit-core-rendering.md).
     const char* const SCENE_NAME = "INTRO";
 
 }  // namespace
@@ -34,7 +32,7 @@ namespace {
 IntroScene::IntroScene(std::shared_ptr<Text> font, DebugConfig::StartingPlayers starting_players)
     : font_(std::move(font)),
       starting_players_(starting_players) {
-    std::cout << "[scene] " << SCENE_NAME << " start (players=" << DebugConfig::toString(starting_players_) << ")\n";
+    Log::info("scene", "{} start (players={})", SCENE_NAME, DebugConfig::toString(starting_players_));
 }
 
 IntroScene::~IntroScene() = default;
diff --git a/source/game/scenes/logo_scene.cpp b/source/game/scenes/logo_scene.cpp
index e809925..904c898 100644
--- a/source/game/scenes/logo_scene.cpp
+++ b/source/game/scenes/logo_scene.cpp
@@ -4,7 +4,6 @@
 
 #include <algorithm>
 #include <cstdint>
-#include <iostream>
 #include <utility>
 
 #include "core/audio/audio.hpp"
@@ -19,19 +18,17 @@
 #include "game/scenes/placeholder_input.hpp"
 #include "game/scenes/scene_flow.hpp"
 #include "utils/defines.hpp"
+#include "utils/log.hpp"
 
 namespace {
 
-    // TODO: migrar a un logger unificat quan es decideixi (veure INC-03 a
-    // docs/audit-core-rendering.md). De moment std::cout per rastrejar el
-    // flux d'escenes als smoke runs.
     const char* const SCENE_NAME = "LOGO";
 
 }  // namespace
 
 LogoScene::LogoScene(std::shared_ptr<Surface> logo, bool reset)
     : logo_(std::move(logo)) {
-    std::cout << "[scene] " << SCENE_NAME << (reset ? " start (reset)\n" : " start\n");
+    Log::info("scene", "{} start{}", SCENE_NAME, reset ? " (reset)" : "");
     if (reset) {
         if (auto* audio = Audio::get(); audio != nullptr) {
             audio->stopMusic();
diff --git a/source/game/scenes/room_fsm.cpp b/source/game/scenes/room_fsm.cpp
index a8b6511..0eeb934 100644
--- a/source/game/scenes/room_fsm.cpp
+++ b/source/game/scenes/room_fsm.cpp
@@ -1,12 +1,12 @@
 #include "game/scenes/room_fsm.hpp"
 
 #include <array>
-#include <iostream>
 #include <string_view>
 
 #include "core/locale/locale.hpp"
 #include "core/resources/resource_helper.hpp"
 #include "external/fkyaml_node.hpp"
+#include "utils/log.hpp"
 
 namespace {
 
@@ -28,7 +28,7 @@ namespace RoomFsm {
 
         auto bytes = Resource::Helper::loadFile(yaml_path);
         if (bytes.empty()) {
-            std::cout << "RoomFsm: " << yaml_path << " absent — uso fallbacks compilats\n";
+            Log::warn("RoomFsm", "{} absent — uso fallbacks compilats", yaml_path);
             return cfg;
         }
         const auto* begin = reinterpret_cast<const char*>(bytes.data());
@@ -83,9 +83,7 @@ namespace RoomFsm {
             cfg.text_panel_height_px = readChildInt(n, "height_px", cfg.text_panel_height_px);
         }
 
-        std::cout << "RoomFsm: timings carregats des de " << yaml_path
-                  << " (intro fade " << cfg.intro_fade_in_ms
-                  << "ms, outro fade " << cfg.outro_fade_out_ms << "ms)\n";
+        Log::info("RoomFsm", "timings carregats des de {} (intro fade {}ms, outro fade {}ms)", yaml_path, cfg.intro_fade_in_ms, cfg.outro_fade_out_ms);
         return cfg;
     }
 
diff --git a/source/game/scenes/title_scene.cpp b/source/game/scenes/title_scene.cpp
index 9dfa613..09fbea5 100644
--- a/source/game/scenes/title_scene.cpp
+++ b/source/game/scenes/title_scene.cpp
@@ -4,7 +4,6 @@
 
 #include <algorithm>
 #include <cstdint>
-#include <iostream>
 #include <string>
 #include <utility>
 
@@ -26,6 +25,7 @@
 #include "utils/defaults.hpp"
 #include "utils/defines.hpp"
 #include "utils/easing.hpp"
+#include "utils/log.hpp"
 
 namespace {
 
@@ -72,7 +72,7 @@ TitleScene::TitleScene(std::shared_ptr<Text> condensed_font, std::shared_ptr<Tex
       game_logo_(std::move(game_logo)),
       mini_logo_(std::move(mini_logo)),
       timer_ms_(UiConfig::get().titleDurationMs()) {
-    std::cout << "[scene] " << SCENE_NAME << " start\n";
+    Log::info("scene", "{} start", SCENE_NAME);
     const auto& hh = UiConfig::get().titleHeatHaze();
     if (hh.enabled) {
         heat_haze_.emplace(Effects::HeatHaze::Params{
@@ -190,7 +190,7 @@ void TitleScene::enterStarting(DebugConfig::StartingPlayers players) {
     if (auto* audio = Audio::get(); audio != nullptr) {
         audio->fadeOutMusic(UiConfig::get().titleMusicFadeOutMs());
     }
-    std::cout << "[scene] " << SCENE_NAME << " STARTING (players=" << DebugConfig::toString(players) << ")\n";
+    Log::info("scene", "{} STARTING (players={})", SCENE_NAME, DebugConfig::toString(players));
 }
 
 void TitleScene::tickIdle(int delta_ms, bool p1_start, bool p2_start) {
@@ -255,7 +255,7 @@ void TitleScene::enterAttract() {
     if (attract_fade_) {
         attract_fade_->begin(UiConfig::get().titleAttractFadeToBlackMs());
     }
-    std::cout << "[scene] " << SCENE_NAME << " ATTRACT_OUT\n";
+    Log::info("scene", "{} ATTRACT_OUT", SCENE_NAME);
 }
 
 void TitleScene::advanceToIntro(DebugConfig::StartingPlayers players) {
diff --git a/source/game/ui/hud.cpp b/source/game/ui/hud.cpp
index a65332d..61cb178 100644
--- a/source/game/ui/hud.cpp
+++ b/source/game/ui/hud.cpp
@@ -6,7 +6,6 @@
 #include <cmath>
 #include <cstddef>
 #include <cstdint>
-#include <iostream>
 #include <string>
 #include <utility>
 #include <variant>
@@ -19,6 +18,7 @@
 #include "utils/defaults.hpp"
 #include "utils/defines.hpp"
 #include "utils/easing.hpp"
+#include "utils/log.hpp"
 
 namespace {
 
@@ -127,17 +127,16 @@ Hud::Hud(EventBus& bus, std::shared_ptr<Text> font)
         blk.flash_ms_left = UiConfig::get().hudFlashMs();
         blk.shake_ms_left = UiConfig::get().hudShakeMs();
         blk.shake_intensity = 1.5F;
-        std::cout << "[HUD] player_hit p" << (IDX + 1) << " dmg=" << (dmg != nullptr ? *dmg : 0)
-                  << " lives=" << players_[IDX].lives << '\n';
+        Log::info("HUD", "player_hit p{} dmg={} lives={}", IDX + 1, dmg != nullptr ? *dmg : 0, players_[IDX].lives);
     }));
 
     subs_.push_back(bus_.subscribe("level_complete", [](const Event& /*ev*/) {
         // TODO: capturar `this` i cridar setMode(*, Mode::Win) per als
         // tres blocs quan el mode Win estiga implementat.
-        std::cout << "[HUD] level_complete (mode Win pendent)\n";
+        Log::info("HUD", "level_complete (mode Win pendent)");
     }));
 
-    std::cout << "[HUD] init: 3 blocks ready (entry " << ENTRY_MS << " ms)\n";
+    Log::info("HUD", "init: 3 blocks ready (entry {} ms)", ENTRY_MS);
 }
 
 Hud::~Hud() {