diff --git a/ts/routes/deck-options/SimulatorModal.svelte b/ts/routes/deck-options/SimulatorModal.svelte
index 070bed4fa..64b712560 100644
--- a/ts/routes/deck-options/SimulatorModal.svelte
+++ b/ts/routes/deck-options/SimulatorModal.svelte
@@ -383,38 +383,34 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
                     {/if}
                 </details>
 
-                <div class="m-2">
-                    <details>
-                        <summary>{tr.deckConfigComputeOptimalRetention()}</summary>
-                        <button
-                            class="btn {computingRetention
-                                ? 'btn-warning'
-                                : 'btn-primary'}"
-                            disabled={!computingRetention && computing}
-                            on:click={() => computeRetention()}
-                        >
-                            {#if computingRetention}
-                                {tr.actionsCancel()}
-                            {:else}
-                                {tr.deckConfigComputeButton()}
-                            {/if}
-                        </button>
-
-                        {#if optimalRetention}
-                            {estimatedRetention(optimalRetention)}
-                            {#if optimalRetention - $config.desiredRetention >= 0.01}
-                                <Warning
-                                    warning={tr.deckConfigDesiredRetentionBelowOptimal()}
-                                    className="alert-warning"
-                                />
-                            {/if}
-                        {/if}
-
+                <details>
+                    <summary>{tr.deckConfigComputeOptimalRetention()}</summary>
+                    <button
+                        class="btn {computingRetention ? 'btn-warning' : 'btn-primary'}"
+                        disabled={!computingRetention && computing}
+                        on:click={() => computeRetention()}
+                    >
                         {#if computingRetention}
-                            <div>{computeRetentionProgressString}</div>
+                            {tr.actionsCancel()}
+                        {:else}
+                            {tr.deckConfigComputeButton()}
                         {/if}
-                    </details>
-                </div>
+                    </button>
+
+                    {#if optimalRetention}
+                        {estimatedRetention(optimalRetention)}
+                        {#if optimalRetention - $config.desiredRetention >= 0.01}
+                            <Warning
+                                warning={tr.deckConfigDesiredRetentionBelowOptimal()}
+                                className="alert-warning"
+                            />
+                        {/if}
+                    {/if}
+
+                    {#if computingRetention}
+                        <div>{computeRetentionProgressString}</div>
+                    {/if}
+                </details>
 
                 <button
                     class="btn {computing ? 'btn-warning' : 'btn-primary'}"