diff --git a/package-lock.json b/package-lock.json
index 3562939..323270f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,7 @@
         "@angular/forms": "^20.3.0",
         "@angular/platform-browser": "^20.3.0",
         "@angular/router": "^20.3.0",
+        "bootstrap": "^5.3.8",
         "rxjs": "~7.8.0",
         "tslib": "^2.3.0",
         "zone.js": "~0.15.0"
@@ -2969,6 +2970,17 @@
       "license": "MIT",
       "optional": true
     },
+    "node_modules/@popperjs/core": {
+      "version": "2.11.8",
+      "resolved": "https://registry.npmjs.org/@popperjs/core/-/core-2.11.8.tgz",
+      "integrity": "sha512-P1st0aksCrn9sGZhp8GMYwBnQsbvAWsZAX44oXNNvLHGqAOcoVxmjZiohstwQ7SqKnbR47akdNi+uleWD8+g6A==",
+      "license": "MIT",
+      "peer": true,
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/popperjs"
+      }
+    },
     "node_modules/@rollup/rollup-android-arm-eabi": {
       "version": "4.59.0",
       "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.59.0.tgz",
@@ -3820,6 +3832,25 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/bootstrap": {
+      "version": "5.3.8",
+      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-5.3.8.tgz",
+      "integrity": "sha512-HP1SZDqaLDPwsNiqRqi5NcP0SSXciX2s9E+RyqJIIqGo+vJeN5AJVM98CXmW/Wux0nQ5L7jeWUdplCEf0Ee+tg==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/twbs"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/bootstrap"
+        }
+      ],
+      "license": "MIT",
+      "peerDependencies": {
+        "@popperjs/core": "^2.11.8"
+      }
+    },
     "node_modules/brace-expansion": {
       "version": "1.1.14",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.14.tgz",
diff --git a/package.json b/package.json
index 5678b25..0882715 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "@angular/forms": "^20.3.0",
     "@angular/platform-browser": "^20.3.0",
     "@angular/router": "^20.3.0",
+    "bootstrap": "^5.3.8",
     "rxjs": "~7.8.0",
     "tslib": "^2.3.0",
     "zone.js": "~0.15.0"
@@ -45,4 +46,4 @@
     "karma-jasmine-html-reporter": "~2.1.0",
     "typescript": "~5.9.2"
   }
-}
\ No newline at end of file
+}
diff --git a/src/app/components/chess-piece/chess-piece.component.css b/src/app/components/chess-piece/chess-piece.component.css
index 92749ff..04ff130 100644
--- a/src/app/components/chess-piece/chess-piece.component.css
+++ b/src/app/components/chess-piece/chess-piece.component.css
@@ -1,7 +1,31 @@
 .piece {
-  width: clamp(40px, 9cqh, 130px);
-  height: clamp(40px, 9cqh, 130px);
+  width: clamp(50px, 11cqh, 160px);
+  height: clamp(50px, 11cqh, 160px);
   display: block;
   object-fit: contain;
   pointer-events: none;
 }
+
+/* Tablets and below - reduce piece size */
+@media (max-width: 991px) {
+  .piece {
+    width: clamp(40px, 9cqh, 130px);
+    height: clamp(40px, 9cqh, 130px);
+  }
+}
+
+/* Mobile - smaller pieces */
+@media (max-width: 768px) {
+  .piece {
+    width: clamp(32px, 8cqh, 100px);
+    height: clamp(32px, 8cqh, 100px);
+  }
+}
+
+/* Small phones - even smaller */
+@media (max-width: 480px) {
+  .piece {
+    width: clamp(24px, 6cqh, 75px);
+    height: clamp(24px, 6cqh, 75px);
+  }
+}
diff --git a/src/app/pages/game/game.component.css b/src/app/pages/game/game.component.css
index 7b5ad50..edf4e18 100644
--- a/src/app/pages/game/game.component.css
+++ b/src/app/pages/game/game.component.css
@@ -1,161 +1,253 @@
 .game-shell {
-  height: 100dvh;
+  min-height: 100dvh;
   padding: clamp(0.75rem, 2vw, 1.5rem);
-  overflow: hidden;
 }
 
 .game-card {
-  max-width: 1100px;
-  height: 100%;
+  max-width: 1400px;
   margin: 0 auto;
   background: #F3C8A0;
   border: 2px solid #5A2C28;
   border-radius: 12px;
-  padding: clamp(0.75rem, 1.5vw, 1.25rem);
+  padding: clamp(1rem, 2vw, 1.5rem);
   box-shadow: 0 8px 24px rgba(90, 44, 40, 0.2);
-  display: flex;
-  flex-direction: column;
-  min-height: 0;
 }
 
 header {
-  margin-bottom: 1rem;
+  margin-bottom: 1.5rem;
 }
 
 h1,
 h2 {
   color: #5A2C28;
   margin: 0 0 0.5rem;
+  font-size: clamp(1.5rem, 4vw, 2rem);
 }
 
 .meta {
-  margin: 0;
+  color: #5A2C28;
+  font-size: 0.95rem;
 }
 
 .back-link {
   display: inline-block;
   margin-bottom: 0.5rem;
   color: #5A2C28;
+  text-decoration: none;
+  font-weight: 600;
+}
+
+.back-link:hover {
+  text-decoration: underline;
 }
 
 .top-section {
-  display: grid;
-  gap: 0.5rem;
-  margin-bottom: 0.5rem;
-  flex: 0 0 auto;
-}
-
-.content-layout {
-  flex: 1 1 auto;
-  min-height: 0;
-  display: grid;
-  grid-template-columns: minmax(220px, 0.95fr) minmax(0, 2.4fr) minmax(220px, 0.95fr);
-  gap: 0.75rem;
-}
-
-.center-column {
-  min-width: 0;
-  min-height: 0;
-  display: flex;
-  flex-direction: column;
+  background: #F3C8A0;
+  padding: 0.75rem;
+  border-radius: 8px;
+  border: 1px solid #5A2C28;
 }
 
 .move-form {
-  display: flex;
-  flex-wrap: wrap;
   align-items: center;
-  gap: 0.75rem;
+}
+
+.move-form label {
+  color: #5A2C28;
+  font-weight: 600;
+  white-space: nowrap;
 }
 
 .board-hint {
-  margin: 0;
   color: #5A2C28;
+  margin: 0;
+}
+
+.center-column {
+  width: 100%;
 }
 
 .board-section {
-  flex: 1 1 auto;
-  min-height: 180px;
-  display: grid;
-  place-items: center;
-  container-type: size;
-  padding: clamp(0.35rem, 1vw, 0.75rem);
-  border-radius: 10px;
-  border: 2px solid #5A2C28;
   background: #B9DAD1;
-  overflow: hidden;
+  border: 2px solid #5A2C28;
+  border-radius: 10px;
+  padding: clamp(0.5rem, 1vw, 1rem);
+  min-height: 400px;
+  container-type: size;
 }
 
 .import-card {
   background: #E1EAA9;
   border: 2px solid #5A2C28;
   border-radius: 10px;
-  padding: 0.65rem;
-  display: grid;
-  align-self: start;
-  align-content: start;
-  gap: 0.5rem;
+  padding: 1rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
 }
 
 .import-card label {
   color: #5A2C28;
   font-weight: 700;
+  margin-bottom: 0.25rem;
 }
 
-input {
+.import-card textarea {
   border: 2px solid #5A2C28;
-  border-radius: 10px;
-  background: #B9DAD1;
-  padding: 0.6rem 0.75rem;
-  min-width: 180px;
-}
-
-textarea {
-  border: 2px solid #5A2C28;
-  border-radius: 10px;
+  border-radius: 8px;
   background: #B9DAD1;
   padding: 0.6rem 0.75rem;
   resize: vertical;
-  min-height: 80px;
+  min-height: 100px;
+  font-family: inherit;
 }
 
-button {
+.import-card input {
   border: 2px solid #5A2C28;
-  border-radius: 10px;
+  border-radius: 8px;
+  background: #B9DAD1;
+  padding: 0.6rem 0.75rem;
+  font-family: inherit;
+}
+
+.btn {
+  border: 2px solid #5A2C28;
+  border-radius: 8px;
   background: #C19EF5;
   color: #5A2C28;
   padding: 0.6rem 1rem;
   cursor: pointer;
+  font-weight: 600;
+  transition: background-color 0.2s, color 0.2s;
 }
 
-button:hover {
+.btn:hover {
   background: #BA6D4B;
   color: #F3C8A0;
 }
 
-.error {
-  margin-top: 0.5rem;
-  color: #5A2C28;
-  font-weight: 700;
+.alert {
+  border-radius: 8px;
+  border: 2px solid #5A2C28;
 }
 
-@media (max-width: 920px) {
-  .content-layout {
-    grid-template-columns: 1fr;
-    grid-template-areas:
-      "center"
-      "fen"
-      "pgn";
+@media (max-width: 991px) {
+  .game-card {
+    padding: clamp(0.75rem, 1.5vw, 1rem);
   }
 
-  .center-column {
-    grid-area: center;
+  .board-section {
+    min-height: 350px;
   }
 
-  .fen-card {
-    grid-area: fen;
-  }
-
-  .pgn-card {
-    grid-area: pgn;
+  h1,
+  h2 {
+    font-size: clamp(1.25rem, 3vw, 1.75rem);
+  }
+}
+
+@media (max-width: 768px) {
+  .game-shell {
+    padding: clamp(0.5rem, 1.5vw, 1rem);
+  }
+
+  .game-card {
+    padding: clamp(0.5rem, 1vw, 0.75rem);
+  }
+
+  header {
+    margin-bottom: 1rem;
+  }
+
+  h1,
+  h2 {
+    font-size: 1.25rem;
+  }
+
+  .meta {
+    font-size: 0.85rem;
+  }
+
+  .top-section {
+    padding: 0.5rem;
+    margin-bottom: 0.75rem;
+  }
+
+  .move-form {
+    flex-wrap: wrap;
+  }
+
+  .move-form label {
+    flex-basis: 100%;
+    margin-bottom: 0.5rem;
+  }
+
+  .board-section {
+    min-height: 300px;
+  }
+
+  .import-card {
+    padding: 0.75rem;
+    gap: 0.5rem;
+  }
+
+  .import-card label {
+    font-size: 0.9rem;
+  }
+
+  .import-card textarea,
+  .import-card input {
+    min-height: 70px;
+    font-size: 0.9rem;
+    padding: 0.5rem;
+  }
+
+  .btn {
+    padding: 0.5rem 0.75rem;
+    font-size: 0.9rem;
+  }
+}
+
+@media (max-width: 480px) {
+  .game-shell {
+    padding: 0.5rem;
+  }
+
+  .game-card {
+    padding: 0.5rem;
+    border-radius: 8px;
+  }
+
+  header {
+    margin-bottom: 0.75rem;
+  }
+
+  h1 {
+    font-size: 1.1rem;
+  }
+
+  .meta {
+    font-size: 0.75rem;
+  }
+
+  .top-section {
+    padding: 0.4rem;
+    margin-bottom: 0.5rem;
+  }
+
+  .board-section {
+    min-height: 250px;
+  }
+
+  .import-card {
+    padding: 0.5rem;
+    gap: 0.35rem;
+  }
+
+  .import-card textarea,
+  .import-card input {
+    min-height: 50px;
+    font-size: 0.8rem;
+    padding: 0.4rem;
   }
 }
diff --git a/src/app/pages/game/game.component.html b/src/app/pages/game/game.component.html
index 64a6f81..41a3bc3 100644
--- a/src/app/pages/game/game.component.html
+++ b/src/app/pages/game/game.component.html
@@ -1,63 +1,80 @@
 <main class="game-shell">
   <section class="game-card">
-    <header>
+    <header class="mb-3">
       <a routerLink="/" class="back-link">Back</a>
-      <h1>1 vs 1 Game</h1>
-      <p class="meta">Game ID: <strong>{{ facade.gameId }}</strong></p>
+      <h1 class="mb-2">1 vs 1 Game</h1>
+      <p class="meta mb-0">Game ID: <strong>{{ facade.gameId }}</strong></p>
     </header>
 
     @if (facade.loading) {
       <p>Loading game state...</p>
     } @else if (facade.state) {
-      <section class="content-layout">
-        <aside class="import-card fen-card">
-          <label for="fenImport">Import FEN</label>
-          <textarea
-            id="fenImport"
-            name="fenImport"
-            [(ngModel)]="facade.fenInput"
-            rows="4"
-            placeholder="rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
-          ></textarea>
-          <button type="button" (click)="facade.importFen()">Load FEN</button>
-        </aside>
+      <div class="container-fluid">
+        <div class="row g-3">
+          <!-- Left Sidebar - FEN Import -->
+          <div class="col-lg-3 col-md-6 col-12 order-lg-1 order-2">
+            <aside class="import-card fen-card h-100">
+              <label for="fenImport">Import FEN</label>
+              <textarea
+                id="fenImport"
+                name="fenImport"
+                [(ngModel)]="facade.fenInput"
+                rows="4"
+                placeholder="rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
+              ></textarea>
+              <button type="button" class="btn w-100" (click)="facade.importFen()">Load FEN</button>
+            </aside>
+          </div>
 
-        <section class="center-column">
-          <section class="top-section">
-            <form class="move-form" (ngSubmit)="facade.submitMove()">
-              <label for="uciMove">Play move (UCI)</label>
-              <input id="uciMove" name="uciMove" [(ngModel)]="facade.moveInput" placeholder="e2e4" />
-              <button type="submit">Send Move</button>
-            </form>
-            <p class="board-hint">Click your piece to highlight legal targets.</p>
-          </section>
+          <!-- Center - Chess Board -->
+          <div class="col-lg-6 col-md-12 col-12 order-lg-2 order-1">
+            <section class="center-column d-flex flex-column h-100">
+              <div class="top-section mb-3">
+                <form class="move-form d-flex flex-wrap gap-2 mb-2" (ngSubmit)="facade.submitMove()">
+                  <label for="uciMove" class="form-label mb-0">Play move (UCI)</label>
+                  <input 
+                    id="uciMove" 
+                    name="uciMove" 
+                    class="form-control flex-grow-1"
+                    [(ngModel)]="facade.moveInput" 
+                    placeholder="e2e4" 
+                  />
+                  <button type="submit" class="btn">Send Move</button>
+                </form>
+                <p class="board-hint small mb-0">Click your piece to highlight legal targets.</p>
+              </div>
 
-          <section class="board-section">
-            <app-chess-board
-              [fen]="facade.state.fen"
-              [selectedSquare]="facade.selectedSquare"
-              [highlightedSquares]="facade.highlightedSquares"
-              (squareSelected)="facade.onBoardSquareSelected($event)"
-            />
-          </section>
-        </section>
+              <div class="board-section flex-grow-1 d-flex align-items-center justify-content-center">
+                <app-chess-board
+                  [fen]="facade.state.fen"
+                  [selectedSquare]="facade.selectedSquare"
+                  [highlightedSquares]="facade.highlightedSquares"
+                  (squareSelected)="facade.onBoardSquareSelected($event)"
+                />
+              </div>
+            </section>
+          </div>
 
-        <aside class="import-card pgn-card">
-          <label for="pgnImport">Import PGN</label>
-          <textarea
-            id="pgnImport"
-            name="pgnImport"
-            [(ngModel)]="facade.pgnInput"
-            rows="4"
-            placeholder="1. e4 e5 2. Nf3 Nc6 *"
-          ></textarea>
-          <button type="button" (click)="facade.importPgn()">Load PGN</button>
-        </aside>
-      </section>
+          <!-- Right Sidebar - PGN Import -->
+          <div class="col-lg-3 col-md-6 col-12 order-lg-3 order-3">
+            <aside class="import-card pgn-card h-100">
+              <label for="pgnImport">Import PGN</label>
+              <textarea
+                id="pgnImport"
+                name="pgnImport"
+                [(ngModel)]="facade.pgnInput"
+                rows="4"
+                placeholder="1. e4 e5 2. Nf3 Nc6 *"
+              ></textarea>
+              <button type="button" class="btn w-100" (click)="facade.importPgn()">Load PGN</button>
+            </aside>
+          </div>
+        </div>
+      </div>
     }
 
     @if (facade.errorMessage) {
-      <p class="error">{{ facade.errorMessage }}</p>
+      <p class="alert alert-danger mt-3 mb-0">{{ facade.errorMessage }}</p>
     }
   </section>
 </main>
diff --git a/src/app/pages/welcome/welcome.component.css b/src/app/pages/welcome/welcome.component.css
index b4afc80..1407a16 100644
--- a/src/app/pages/welcome/welcome.component.css
+++ b/src/app/pages/welcome/welcome.component.css
@@ -67,3 +67,77 @@ p {
   font-weight: 700;
   margin-top: 1rem;
 }
+
+@media (max-width: 768px) {
+  .welcome-shell {
+    padding: 1rem;
+  }
+
+  .welcome-card {
+    padding: 1.5rem;
+  }
+
+  h1 {
+    font-size: 1.5rem;
+  }
+
+  p {
+    font-size: 0.875rem;
+    margin: 0 0 1rem;
+  }
+
+  .mode-grid {
+    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
+    gap: 0.75rem;
+  }
+
+  .mode {
+    padding: 0.75rem;
+    gap: 0.15rem;
+  }
+
+  .mode span {
+    font-size: 1rem;
+  }
+
+  .mode small {
+    font-size: 0.7rem;
+  }
+
+  .error {
+    font-size: 0.75rem;
+  }
+}
+
+@media (max-width: 480px) {
+  .welcome-shell {
+    padding: 0.5rem;
+  }
+
+  .welcome-card {
+    padding: 1rem;
+    border-radius: 8px;
+  }
+
+  h1 {
+    font-size: 1.25rem;
+    margin: 0 0 0.15rem;
+  }
+
+  p {
+    font-size: 0.8rem;
+    margin: 0 0 0.75rem;
+  }
+
+  .mode-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .mode {
+    padding: 0.65rem;
+  }
+
+  .mode span {
+    font-size: 0.95rem;
+  }
+}
diff --git a/src/styles.css b/src/styles.css
index 0bb4726..628021c 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -1,3 +1,5 @@
+@import 'bootstrap/dist/css/bootstrap.min.css';
+
 :root {
   --warm-primary: #BA6D4B;
   --warm-dark: #5A2C28;