diff --git a/frontend/src/components/ChatHeader.vue b/frontend/src/components/ChatHeader.vue
index 99f2fa1..c80d0ff 100644
--- a/frontend/src/components/ChatHeader.vue
+++ b/frontend/src/components/ChatHeader.vue
@@ -9,6 +9,7 @@
     </div>
 
     <div class="header-right">
+      <ThemePicker v-model="theme" />
       <span v-if="ip" class="me-ip" :title="'Ton pseudo = ton IP'">{{ ip }}</span>
       <span class="balance" :class="{ 'balance--free': freeMode }" title="Tes crédits XIP">
         <span class="balance-coin">◈</span>
@@ -23,10 +24,13 @@
 
 <script setup lang="ts">
 import { useWallet } from '@/composables/useWallet';
+import { useTheme } from '@/composables/useTheme';
+import ThemePicker from './ThemePicker.vue';
 
 defineProps<{ connectedCount: number }>();
 
 const { ip, freeMode, displayBalance } = useWallet();
+const { theme } = useTheme();
 </script>
 
 <style scoped>
diff --git a/frontend/src/components/MessageItem.vue b/frontend/src/components/MessageItem.vue
index e3c8412..0a578f4 100644
--- a/frontend/src/components/MessageItem.vue
+++ b/frontend/src/components/MessageItem.vue
@@ -65,57 +65,17 @@
 </template>
 
 <script setup lang="ts">
-import type { Message, Reply, GeoInfo } from '@/composables/useMessages';
-import { getIpColorWithPerks, getIpGlowWithPerks, getIpColor, getIpGlow } from '@/composables/ipColor';
-import { usePerks } from '@/composables/usePerks';
+import type { Message } from '@/composables/useMessages';
 import { openContextMenu } from '@/composables/useContextMenu';
-import { useCustomStyles, IP_COLOR_OPTIONS } from '@/composables/useCustomStyles';
-import { useMyPerks } from '@/composables/useMessages';
+import { IP_COLOR_OPTIONS } from '@/composables/useCustomStyles';
+import { useMessageItem } from '@/composables/useMessageItem';
 import RichContent from './RichContent.vue';
 import MessageAttachments from './MessageAttachments.vue';
 
 const props = defineProps<{ message: Message; myIp?: string }>();
 defineEmits<{ reply: [payload: { id: string; authorIp: string }] }>();
 
-const { perksFor } = usePerks();
-const { myPerks } = useMyPerks();
-const { prefs } = useCustomStyles();
-
-function perksOf(m: Reply): any {
-  return m.authorPerks ?? perksFor(m.authorIp);
-}
-
-function ipStyle(m: Reply) {
-  const ip = m.authorIp;
-  const colorOverride = prefs.ipColors[ip];
-  if (colorOverride && colorOverride !== 'auto') {
-    return { color: colorOverride, textShadow: getIpGlow(colorOverride) };
-  }
-  const p = perksOf(m);
-  return {
-    color: getIpColorWithPerks(ip, p),
-    textShadow: getIpGlowWithPerks(ip, p),
-  };
-}
-
-function petsLeft(m: Reply): string {
-  const ip = m.authorIp;
-  if (ip in prefs.ipPets) return prefs.ipPets[ip]; // '' = aucun pet
-  const pets = perksOf(m)?.pets ?? [];
-  return pets
-    .filter((x: any) => x.position === 'left' || x.position === 'both')
-    .map((x: any) => x.char)
-    .join('');
-}
-function petsRight(m: Reply): string {
-  const ip = m.authorIp;
-  if (ip in prefs.ipPets) return ''; // override = pet gauche uniquement
-  const pets = perksOf(m)?.pets ?? [];
-  return pets
-    .filter((x: any) => x.position === 'right' || x.position === 'both')
-    .map((x: any) => x.char)
-    .join('');
-}
+const { ipStyle, petsLeft, petsRight, fmt, geoLabel, geoLink, myPerks, prefs } = useMessageItem();
 
 function openIpMenu(e: MouseEvent, ip: string): void {
   if (ip !== props.myIp) return;
@@ -171,26 +131,6 @@ function openIpMenu(e: MouseEvent, ip: string): void {
   });
 }
 
-function fmt(date: string): string {
-  return new Date(date).toLocaleTimeString('fr-FR', { hour: '2-digit', minute: '2-digit' });
-}
-
-function geoLabel(geo?: GeoInfo | null): string {
-  if (!geo) return '';
-  if (!geo.countryCode) return 'Local';
-  const place = geo.city || geo.country;
-  if (geo.lat != null && geo.lon != null) {
-    const lat = geo.lat.toFixed(4);
-    const lon = geo.lon.toFixed(4);
-    return `${place} · ${lat}, ${lon}`;
-  }
-  return place;
-}
-
-function geoLink(geo?: GeoInfo | null): string {
-  if (!geo || geo.lat == null || geo.lon == null) return 'https://maps.google.com';
-  return `https://www.google.com/maps/search/?api=1&query=${geo.lat},${geo.lon}`;
-}
 </script>
 
 <style scoped>
diff --git a/frontend/src/components/MessageItemBubble.vue b/frontend/src/components/MessageItemBubble.vue
new file mode 100644
index 0000000..59e367b
--- /dev/null
+++ b/frontend/src/components/MessageItemBubble.vue
@@ -0,0 +1,154 @@
+<!-- Variante "bulles" du message — style chat mobile -->
+<template>
+  <div class="bubble-item" :class="{ 'bubble-item--mine': isMine }">
+    <div class="bubble-header">
+      <span class="bubble-ip" :style="ipStyle(message)">
+        <span v-if="petsLeft(message)" class="pet">{{ petsLeft(message) }}</span>
+        {{ message.authorIp }}
+        <span v-if="petsRight(message)" class="pet">{{ petsRight(message) }}</span>
+        <span v-if="message.authorPerks?.badge" class="vip-badge">VIP</span>
+      </span>
+      <span class="bubble-ts">{{ fmt(message.createdAt) }}</span>
+      <a
+        v-if="message.authorGeo && geoLabel(message.authorGeo)"
+        :href="geoLink(message.authorGeo)"
+        target="_blank"
+        rel="noopener noreferrer"
+        class="geo-link"
+      >
+        <img
+          v-if="message.authorGeo.countryCode"
+          :src="`https://flagcdn.com/16x12/${message.authorGeo.countryCode.toLowerCase()}.png`"
+          :alt="message.authorGeo.countryCode"
+          class="geo-flag"
+        />
+        <span v-else>🏠</span>
+      </a>
+    </div>
+
+    <!-- Contenu -->
+    <div class="bubble" :class="{ 'bubble--mine': isMine }">
+      <RichContent
+        v-if="message.richMode && message.richMode !== 'none' && message.richContent"
+        :mode="message.richMode"
+        :content="message.richContent"
+      />
+      <span v-else>{{ message.content }}</span>
+    </div>
+
+    <MessageAttachments v-if="message.attachments?.length" :attachments="message.attachments" />
+
+    <!-- Réponses en thread -->
+    <div v-if="message.replies?.length" class="bubble-thread">
+      <div v-for="reply in message.replies" :key="reply.id" class="bubble-reply">
+        <span class="bubble-reply-ip" :style="ipStyle(reply)">{{ reply.authorIp }}</span>
+        <span class="bubble-reply-ts">{{ fmt(reply.createdAt) }}</span>
+        <RichContent
+          v-if="reply.richMode && reply.richMode !== 'none' && reply.richContent"
+          :mode="reply.richMode"
+          :content="reply.richContent"
+        />
+        <span v-else class="bubble-reply-body">{{ reply.content }}</span>
+      </div>
+    </div>
+
+    <button
+      class="bubble-reply-btn"
+      type="button"
+      @click="$emit('reply', { id: message.id, authorIp: message.authorIp })"
+    >↩</button>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue';
+import type { Message } from '@/composables/useMessages';
+import { useMessageItem } from '@/composables/useMessageItem';
+import RichContent from './RichContent.vue';
+import MessageAttachments from './MessageAttachments.vue';
+
+const props = defineProps<{ message: Message; myIp?: string }>();
+defineEmits<{ reply: [payload: { id: string; authorIp: string }] }>();
+
+const { ipStyle, petsLeft, petsRight, fmt, geoLabel, geoLink } = useMessageItem();
+
+const isMine = computed(() => props.message.authorIp === props.myIp);
+</script>
+
+<style scoped>
+.bubble-item {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  padding: 4px 12px;
+  gap: 3px;
+  position: relative;
+}
+.bubble-item--mine { align-items: flex-end; }
+
+.bubble-header {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-family: 'Courier New', monospace;
+  font-size: 10px;
+}
+.bubble-ip { font-weight: bold; font-size: 11px; }
+.bubble-ts { color: #303040; }
+.pet { font-size: 11px; }
+.vip-badge {
+  font-family: Arial, sans-serif; font-size: 8px; font-weight: bold;
+  color: #ffcc44; background: #2a2206; border: 1px solid #665511;
+  border-radius: 4px; padding: 0 4px; margin-left: 2px;
+}
+
+.bubble {
+  background: #141422;
+  border: 1px solid #222236;
+  border-radius: 14px 14px 14px 4px;
+  padding: 7px 13px;
+  font-family: Arial, sans-serif;
+  font-size: 13px;
+  color: #c0c0c0;
+  max-width: 72%;
+  word-break: break-word;
+  line-height: 1.4;
+}
+.bubble--mine {
+  background: #0e1f30;
+  border-color: #1a3a55;
+  border-radius: 14px 14px 4px 14px;
+  color: #cce0f0;
+}
+
+.bubble-thread {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  padding-left: 12px;
+  border-left: 2px solid #1a1a2e;
+  margin-top: 2px;
+}
+.bubble-reply {
+  display: flex;
+  align-items: baseline;
+  gap: 6px;
+  font-family: Arial, sans-serif;
+  font-size: 11px;
+  color: #888;
+}
+.bubble-reply-ip { font-family: 'Courier New', monospace; font-size: 10px; font-weight: bold; }
+.bubble-reply-ts  { font-family: 'Courier New', monospace; font-size: 9px; color: #303040; }
+.bubble-reply-body { color: #888; }
+
+.bubble-reply-btn {
+  background: none; border: none; cursor: pointer;
+  font-size: 10px; color: #33335a;
+  padding: 0; opacity: 0; transition: opacity 0.12s;
+}
+.bubble-item:hover .bubble-reply-btn { opacity: 1; }
+.bubble-reply-btn:hover { color: #00ccff; }
+
+.geo-link { color: #44445a; text-decoration: none; display: inline-flex; align-items: center; }
+.geo-flag { width: 14px; height: 10px; object-fit: cover; border-radius: 2px; }
+</style>
diff --git a/frontend/src/components/MessageList.vue b/frontend/src/components/MessageList.vue
index 8e89da6..16c95da 100644
--- a/frontend/src/components/MessageList.vue
+++ b/frontend/src/components/MessageList.vue
@@ -1,15 +1,17 @@
 <!-- Zone de messages scrollable avec la pub casino en overlay -->
 <template>
   <div class="feed-wrapper">
-    <!-- Messages -->
     <div ref="listEl" class="feed-scroll">
-      <MessageItem
-        v-for="msg in messages"
-        :key="msg.id"
-        :message="msg"
-        :my-ip="myIp"
-        @reply="$emit('reply', $event)"
-      />
+      <TransitionGroup name="msg" tag="div">
+        <component
+          :is="messageComponent"
+          v-for="msg in messages"
+          :key="msg.id"
+          :message="msg"
+          :my-ip="myIp"
+          @reply="$emit('reply', $event)"
+        />
+      </TransitionGroup>
       <div v-if="messages.length === 0" class="feed-empty">
         Aucun message pour l'instant.
       </div>
@@ -21,24 +23,30 @@
 </template>
 
 <script setup lang="ts">
-import { ref, watch, nextTick } from 'vue';
+import { ref, computed, watch, nextTick } from 'vue';
 import type { Message } from '@/composables/useMessages';
+import { useTheme } from '@/composables/useTheme';
 import MessageItem from './MessageItem.vue';
+import MessageItemBubble from './MessageItemBubble.vue';
 import InlineCasinoAd from './InlineCasinoAd.vue';
 
 const props = defineProps<{ messages: Message[]; hideAds?: boolean; myIp?: string }>();
 defineEmits<{ reply: [payload: { id: string; authorIp: string }] }>();
 
+const { theme } = useTheme();
+
+const messageComponent = computed(() => {
+  if (theme.value === 'bubble') return MessageItemBubble;
+  return MessageItem;
+});
+
 const listEl = ref<HTMLElement | null>(null);
 
-// Auto-scroll vers le bas à chaque nouveau message
 watch(
   () => props.messages.length,
   async () => {
     await nextTick();
-    if (listEl.value) {
-      listEl.value.scrollTop = listEl.value.scrollHeight;
-    }
+    listEl.value?.scrollTo({ top: listEl.value.scrollHeight, behavior: 'smooth' });
   },
 );
 </script>
@@ -69,14 +77,15 @@ watch(
   font-size: 13px;
 }
 
-/* Positionné en absolu sur la droite du wrapper */
 .casino-overlay {
   position: absolute;
   right: 30px;
   top: 20px;
   pointer-events: none;
 }
-.casino-overlay :deep(.casino-cta) {
-  pointer-events: all;
-}
+.casino-overlay :deep(.casino-cta) { pointer-events: all; }
+
+/* Transition d'entrée des nouveaux messages */
+.msg-enter-active { transition: opacity 0.2s ease, transform 0.2s ease; }
+.msg-enter-from   { opacity: 0; transform: translateY(6px); }
 </style>
diff --git a/frontend/src/components/ThemePicker.vue b/frontend/src/components/ThemePicker.vue
new file mode 100644
index 0000000..559b934
--- /dev/null
+++ b/frontend/src/components/ThemePicker.vue
@@ -0,0 +1,41 @@
+<script setup lang="ts">
+import { THEMES, type Theme } from '@/composables/useTheme';
+
+const model = defineModel<Theme>({ required: true });
+</script>
+
+<template>
+  <div class="theme-picker">
+    <button
+      v-for="(info, key) in THEMES"
+      :key="key"
+      class="theme-btn"
+      :class="{ 'theme-btn--active': model === key }"
+      :title="info.label"
+      type="button"
+      @click="model = key"
+    >{{ info.emoji }}</button>
+  </div>
+</template>
+
+<style scoped>
+.theme-picker {
+  display: flex;
+  gap: 4px;
+}
+.theme-btn {
+  background: #131320;
+  border: 1px solid #222233;
+  border-radius: 8px;
+  padding: 3px 7px;
+  cursor: pointer;
+  font-size: 14px;
+  opacity: 0.5;
+  transition: opacity 0.15s, border-color 0.15s;
+}
+.theme-btn:hover { opacity: 0.8; }
+.theme-btn--active {
+  opacity: 1;
+  border-color: #5577aa;
+}
+</style>
diff --git a/frontend/src/composables/useMessageItem.ts b/frontend/src/composables/useMessageItem.ts
new file mode 100644
index 0000000..32606a3
--- /dev/null
+++ b/frontend/src/composables/useMessageItem.ts
@@ -0,0 +1,62 @@
+import { type GeoInfo } from '@/composables/useMessages';
+import { getIpColorWithPerks, getIpGlowWithPerks, getIpGlow } from '@/composables/ipColor';
+import { usePerks } from '@/composables/usePerks';
+import { useCustomStyles } from '@/composables/useCustomStyles';
+import { useMyPerks } from '@/composables/useMessages';
+
+export function useMessageItem() {
+  const { perksFor } = usePerks();
+  const { myPerks } = useMyPerks();
+  const { prefs } = useCustomStyles();
+
+  function perksOf(m: { authorIp: string; authorPerks?: any }) {
+    return m.authorPerks ?? perksFor(m.authorIp);
+  }
+
+  function ipStyle(m: { authorIp: string; authorPerks?: any }) {
+    const ip = m.authorIp;
+    const override = prefs.ipColors[ip];
+    if (override && override !== 'auto') {
+      return { color: override, textShadow: getIpGlow(override) };
+    }
+    const p = perksOf(m);
+    return { color: getIpColorWithPerks(ip, p), textShadow: getIpGlowWithPerks(ip, p) };
+  }
+
+  function petsLeft(m: { authorIp: string; authorPerks?: any }) {
+    const ip = m.authorIp;
+    if (ip in prefs.ipPets) return prefs.ipPets[ip];
+    return (perksOf(m)?.pets ?? [])
+      .filter((x: any) => x.position === 'left' || x.position === 'both')
+      .map((x: any) => x.char).join('');
+  }
+
+  function petsRight(m: { authorIp: string; authorPerks?: any }) {
+    const ip = m.authorIp;
+    if (ip in prefs.ipPets) return '';
+    return (perksOf(m)?.pets ?? [])
+      .filter((x: any) => x.position === 'right' || x.position === 'both')
+      .map((x: any) => x.char).join('');
+  }
+
+  function fmt(date: string) {
+    return new Date(date).toLocaleTimeString('fr-FR', { hour: '2-digit', minute: '2-digit' });
+  }
+
+  function geoLabel(geo?: GeoInfo | null): string {
+    if (!geo) return '';
+    if (!geo.countryCode) return 'Local';
+    const place = geo.city || geo.country;
+    if (geo.lat != null && geo.lon != null) {
+      return `${place} · ${geo.lat.toFixed(4)}, ${geo.lon.toFixed(4)}`;
+    }
+    return place;
+  }
+
+  function geoLink(geo?: GeoInfo | null): string {
+    if (!geo || geo.lat == null || geo.lon == null) return 'https://maps.google.com';
+    return `https://www.google.com/maps/search/?api=1&query=${geo.lat},${geo.lon}`;
+  }
+
+  return { perksOf, ipStyle, petsLeft, petsRight, fmt, geoLabel, geoLink, myPerks, prefs };
+}
diff --git a/frontend/src/composables/useTheme.ts b/frontend/src/composables/useTheme.ts
new file mode 100644
index 0000000..7732f5d
--- /dev/null
+++ b/frontend/src/composables/useTheme.ts
@@ -0,0 +1,39 @@
+import { ref, provide, inject, type InjectionKey, type Ref } from 'vue';
+
+export type Theme = 'default' | 'bubble' | 'compact';
+
+export interface ThemeContext {
+  theme: Ref<Theme>;
+  setTheme: (t: Theme) => void;
+}
+
+export const THEME_KEY: InjectionKey<ThemeContext> = Symbol('xip-theme');
+
+const THEMES: Record<Theme, { label: string; emoji: string }> = {
+  default: { label: 'Classique', emoji: '📋' },
+  bubble:  { label: 'Bulles',    emoji: '💬' },
+  compact: { label: 'Compact',   emoji: '📐' },
+};
+
+export function provideTheme() {
+  const saved = (localStorage.getItem('xip-theme') ?? 'default') as Theme;
+  const theme = ref<Theme>(THEMES[saved] ? saved : 'default');
+
+  function setTheme(t: Theme) {
+    theme.value = t;
+    localStorage.setItem('xip-theme', t);
+  }
+
+  const ctx: ThemeContext = { theme, setTheme };
+  provide(THEME_KEY, ctx);
+  return ctx;
+}
+
+export function useTheme(): ThemeContext {
+  return inject(THEME_KEY, {
+    theme: ref<Theme>('default'),
+    setTheme: () => {},
+  });
+}
+
+export { THEMES };
diff --git a/frontend/src/views/HomePage.vue b/frontend/src/views/HomePage.vue
index 5bfe7a7..6c5b29d 100644
--- a/frontend/src/views/HomePage.vue
+++ b/frontend/src/views/HomePage.vue
@@ -57,7 +57,7 @@
             type="button"
           >🔊</button>
 
-          <div class="field-wrap">
+          <div v-show="richMode === 'none'" class="field-wrap">
             <input
               v-model="draft"
               class="input-field"
@@ -92,6 +92,9 @@ import MessageList from '@/components/MessageList.vue';
 import SendButton  from '@/components/SendButton.vue';
 import StatsTicker from '@/components/StatsTicker.vue';
 import { useMessages } from '@/composables/useMessages';
+import { provideTheme } from '@/composables/useTheme';
+
+provideTheme();
 import { useAttachments } from '@/composables/useAttachments';
 import { useAlert } from '@/composables/useAlert';
 import { useCustomStyles } from '@/composables/useCustomStyles';