diff --git a/src/app.css b/src/app.css
index 31a81c4..325beb2 100644
--- a/src/app.css
+++ b/src/app.css
@@ -225,6 +225,107 @@
 
   .btn-sm { min-height: 26px; padding: 0 8px; font-size: 12px; }
 
+  .select-menu { position: relative; width: 100%; min-width: 0; }
+  .select-menu-trigger {
+    display: grid;
+    grid-template-columns: minmax(0, 1fr) auto;
+    align-items: center;
+    width: 100%;
+    height: 34px;
+    min-height: 34px;
+    padding: 0 9px 0 11px;
+    border: 1px solid var(--color-border-input);
+    border-radius: 6px;
+    color: var(--color-ink);
+    background: var(--color-surface-raised);
+    font-size: 13px;
+    text-align: left;
+  }
+  .select-menu-value { display: flex; align-items: center; min-width: 0; gap: 7px; overflow: hidden; }
+  .select-menu-value > span { overflow: hidden; color: var(--color-ink); font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
+  .select-menu-value > small {
+    flex: 0 0 auto;
+    padding: 2px 5px;
+    border: 1px solid color-mix(in srgb, var(--color-accent) 28%, transparent);
+    border-radius: 4px;
+    color: var(--color-accent);
+    background: color-mix(in srgb, var(--color-accent) 9%, transparent);
+    font-size: 9px;
+    font-weight: 850;
+    letter-spacing: 0.025em;
+  }
+  .select-menu-value.placeholder > span { color: var(--color-ink-muted); font-weight: 600; }
+  .select-menu-trigger svg { color: var(--color-ink-faint); transition: transform 120ms ease; }
+  .select-menu.open .select-menu-trigger {
+    border-color: var(--color-primary);
+    box-shadow: 0 0 0 3px rgba(90, 140, 248, 0.18);
+  }
+  .select-menu.open .select-menu-trigger svg { transform: rotate(180deg); }
+  .select-menu-popup {
+    position: fixed;
+    z-index: 1000;
+    display: grid;
+    gap: 2px;
+    padding: 5px;
+    overflow: auto;
+    border: 1px solid var(--color-border);
+    border-radius: 8px;
+    background: var(--color-surface-solid);
+    box-shadow: 0 18px 50px rgba(0,0,0,0.5);
+  }
+  .select-menu-group {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 12px;
+    margin: 5px 3px 2px;
+    padding: 7px 5px 5px;
+    border-top: 1px solid var(--color-border-subtle);
+    color: var(--color-accent);
+    font-size: 10.5px;
+    font-weight: 900;
+    letter-spacing: 0.065em;
+    text-transform: uppercase;
+  }
+  .select-menu-group:first-child { margin-top: 0; border-top: 0; }
+  .select-menu-group small {
+    min-width: 18px;
+    padding: 1px 5px;
+    border-radius: 999px;
+    color: var(--color-ink);
+    background: var(--color-surface-hover);
+    font-size: 9px;
+    letter-spacing: 0;
+    text-align: center;
+  }
+  .select-menu-option {
+    display: grid;
+    grid-template-columns: minmax(0, 1fr) 14px;
+    align-items: center;
+    justify-content: initial;
+    width: 100%;
+    min-height: 30px;
+    padding: 6px 8px;
+    border-color: transparent;
+    border-radius: 6px;
+    color: var(--color-ink);
+    background: transparent;
+    font-size: 12px;
+    font-weight: 750;
+    text-align: left;
+  }
+  .select-menu-option > span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+  .select-menu-option svg { color: var(--color-primary); }
+  .select-menu-option:hover:not(:disabled), .select-menu-option.active:not(:disabled) {
+    border-color: var(--color-border-subtle);
+    color: var(--color-ink);
+    background: rgba(255,255,255,0.06);
+  }
+  .select-menu-option.selected { color: var(--color-ink); }
+  .select-menu-option:disabled { cursor: not-allowed; opacity: 0.42; }
+
+  .compare-target-select .select-menu-trigger { height: 40px; min-height: 40px; }
+
   .btn-primary {
     border-color: rgba(111, 140, 255, 0.72);
     color: #ffffff;
@@ -3463,11 +3564,12 @@
     border-radius: 5px;
     background: var(--code-surface-subtle);
   }
-  .rebase-action { height: 30px; font-family: var(--font-mono); font-weight: 800; }
-  .rebase-action.pick { color: var(--code-add-strong); }
-  .rebase-action.reword { color: var(--code-hunk-text); }
-  .rebase-action.squash, .rebase-action.fixup { color: #96620f; }
-  .rebase-action.drop { color: var(--code-delete-strong); }
+  .rebase-action { font-family: var(--font-mono); font-weight: 800; }
+  .rebase-action .select-menu-trigger { height: 30px; min-height: 30px; font-family: inherit; font-weight: inherit; }
+  .rebase-action.pick .select-menu-trigger { color: var(--code-add-strong); }
+  .rebase-action.reword .select-menu-trigger { color: var(--code-hunk-text); }
+  .rebase-action.squash .select-menu-trigger, .rebase-action.fixup .select-menu-trigger { color: #96620f; }
+  .rebase-action.drop .select-menu-trigger { color: var(--code-delete-strong); }
   .rebase-plan-row > code { color: var(--color-accent); font-family: var(--font-mono); font-size: 11px; font-weight: 800; }
   .rebase-commit-copy { display: grid; gap: 3px; min-width: 0; }
   .rebase-commit-copy strong { overflow: hidden; color: var(--color-ink); font-size: 12.5px; text-overflow: ellipsis; white-space: nowrap; }
@@ -6512,6 +6614,25 @@ input:focus, textarea:focus, select:focus { box-shadow: 0 0 0 3px color-mix(in s
   box-shadow: 0 18px 50px rgba(28,44,74,0.18);
 }
 
+:root[data-theme="light"] .select-menu-popup {
+  box-shadow: 0 18px 50px rgba(28,44,74,0.18);
+}
+
+:root[data-theme="light"] .select-menu-value > span,
+:root[data-theme="light"] .select-menu-option,
+:root[data-theme="light"] .select-menu-option.selected {
+  color: var(--color-ink);
+}
+
+:root[data-theme="light"] .select-menu-value.placeholder > span {
+  color: var(--color-ink-muted);
+}
+
+:root[data-theme="light"] .select-menu-option:hover:not(:disabled),
+:root[data-theme="light"] .select-menu-option.active:not(:disabled) {
+  background: var(--color-surface-hover);
+}
+
 :root[data-theme="light"] .dialog-file-row:hover,
 :root[data-theme="light"] .branch-row:hover,
 :root[data-theme="light"] .explorer-row:hover,
diff --git a/src/lib/components/AiCommitSplitDialog.svelte b/src/lib/components/AiCommitSplitDialog.svelte
index aba8953..534a478 100644
--- a/src/lib/components/AiCommitSplitDialog.svelte
+++ b/src/lib/components/AiCommitSplitDialog.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
   import { GitCommitHorizontal, LoaderCircle, Sparkles, X } from "@lucide/svelte";
   import type { AiCommitPlan } from "../types";
+  import SelectMenu from "./SelectMenu.svelte";
 
   interface Props {
     plan: AiCommitPlan;
@@ -62,9 +63,7 @@
           <div class="split-files">
             {#each group.files as file}
               <div><code>{file}</code>
-                <select value={groupIndex} onchange={(event) => moveFile(file, groupIndex, Number(event.currentTarget.value))} disabled={isApplying}>
-                  {#each draft.groups as _, target}<option value={target}>Commit {target + 1}</option>{/each}
-                </select>
+                <SelectMenu class="split-file-target" value={String(groupIndex)} options={draft.groups.map((_, target) => ({ value: String(target), label: `Commit ${target + 1}` }))} disabled={isApplying} onChange={(value) => moveFile(file, groupIndex, Number(value))} />
               </div>
             {/each}
           </div>
@@ -98,6 +97,7 @@
   .split-files{display:grid;gap:5px}
   .split-files>div{display:flex;align-items:center;gap:10px;padding:6px 8px;border-radius:6px;background:var(--color-surface)}
   code{min-width:0;flex:1;overflow:hidden;text-overflow:ellipsis;color:var(--color-ink-muted);font-size:11px;white-space:nowrap}
-  select{height:28px;border:1px solid var(--color-border-subtle);border-radius:5px;background:var(--color-surface-raised);color:var(--color-ink);font-size:11px}
+  :global(.split-file-target){width:110px;flex:0 0 110px}
+  :global(.split-file-target .select-menu-trigger){height:28px;min-height:28px;font-size:11px}
   .dialog-footer p.invalid{color:#e0a040}
 </style>
diff --git a/src/lib/components/AiSettingsDialog.svelte b/src/lib/components/AiSettingsDialog.svelte
index 35b5e7c..dcf8caa 100644
--- a/src/lib/components/AiSettingsDialog.svelte
+++ b/src/lib/components/AiSettingsDialog.svelte
@@ -3,6 +3,7 @@
   import { AlertCircle, Bot, Check, Cpu, Eye, EyeOff, Gauge, Globe, Key, LoaderCircle, Sparkles, X, Zap } from "@lucide/svelte";
   import { credDelete, credLoad, credSave } from "../git";
   import type { AiSettings, CommitAiLocalProfile, CommitAiProvider, LocalModelOption } from "../types";
+  import SelectMenu from "./SelectMenu.svelte";
 
   interface Props {
     settings: AiSettings;
@@ -200,11 +201,7 @@
         </div>
         <label class="cred-field">
           <span class="cred-field-label">Model</span>
-          <select bind:value={localModelId}>
-            {#each localModels as option (option.id)}
-              <option value={option.id}>{option.label} — {formatSize(option.approx_size_mb)}</option>
-            {/each}
-          </select>
+          <SelectMenu value={localModelId} options={localModels.map((option) => ({ value: option.id, label: `${option.label} - ${formatSize(option.approx_size_mb)}` }))} onChange={(value) => { localModelId = value; }} />
         </label>
         <div class="cred-token-hint">
           <AlertCircle size={13} aria-hidden="true" />
diff --git a/src/lib/components/AppSettingsDialog.svelte b/src/lib/components/AppSettingsDialog.svelte
index f2edbe8..a448fc2 100644
--- a/src/lib/components/AppSettingsDialog.svelte
+++ b/src/lib/components/AppSettingsDialog.svelte
@@ -37,6 +37,7 @@
     ExternalToolsSettings,
     ToolOpenMode,
   } from "../types";
+  import SelectMenu from "./SelectMenu.svelte";
 
   type SettingsPage = "general" | "tools";
 
@@ -390,17 +391,17 @@
 
               <label class="tool-default-field">
                 <span>{isGerman ? `Standardprogramm für ${toolLabel(activeToolKind)}` : `Default application for ${toolLabel(activeToolKind)}`}</span>
-                <select value={tools[activeToolKind].preset} onchange={(event) => changePreset(activeToolKind, event.currentTarget.value)} aria-label={isGerman ? `Standardprogramm für ${toolLabel(activeToolKind)}` : `Default application for ${toolLabel(activeToolKind)}`}>
-                  {#if availablePresets(activeToolKind).length > 0}
-                    <optgroup label={isGerman ? "Installiert" : "Installed"}>
-                      {#each availablePresets(activeToolKind) as preset}<option value={preset.id}>✓ {preset.label}</option>{/each}
-                    </optgroup>
-                  {/if}
-                  <optgroup label={isGerman ? "Weitere unterstützte Programme" : "Other supported applications"}>
-                    {#each otherPresets(activeToolKind) as preset}<option value={preset.id}>{preset.label}</option>{/each}
-                  </optgroup>
-                  <option value="custom">{isGerman ? "Eigenes Programm auswählen…" : "Choose a custom application…"}</option>
-                </select>
+                <SelectMenu
+                  class="tool-preset-select"
+                  value={tools[activeToolKind].preset}
+                  options={[
+                    ...availablePresets(activeToolKind).map((preset) => ({ value: preset.id, label: `Installed - ${preset.label}`, group: isGerman ? "Installiert" : "Installed" })),
+                    ...otherPresets(activeToolKind).map((preset) => ({ value: preset.id, label: preset.label, group: isGerman ? "Weitere unterstützte Programme" : "Other supported applications" })),
+                    { value: "custom", label: isGerman ? "Eigenes Programm auswählen..." : "Choose a custom application..." },
+                  ]}
+                  ariaLabel={isGerman ? `Standardprogramm für ${toolLabel(activeToolKind)}` : `Default application for ${toolLabel(activeToolKind)}`}
+                  onChange={(value) => changePreset(activeToolKind, value)}
+                />
                 <small>{isGerman ? "Diese Auswahl wird gespeichert und für alle passenden Aktionen verwendet." : "This selection is saved and used for every matching action."}</small>
               </label>
 
@@ -504,8 +505,8 @@
   .tool-open-mode button span { max-width: 100%; overflow: hidden; font-size: 11px; font-weight: 800; text-overflow: ellipsis; white-space: nowrap; }
   .tool-open-mode button small { color: var(--color-ink-faint); font-size: 9px; font-weight: 550; }
   .tool-default-field, .tool-advanced-panel label { display: grid; gap: 6px; min-width: 0; color: var(--color-ink-muted); font-size: 10.5px; font-weight: 750; }
-  .tool-default-field select, .tool-advanced-panel input, .tool-advanced-panel textarea { width: 100%; min-width: 0; border: 1px solid var(--color-border); border-radius: 7px; color: var(--color-ink); background: var(--color-surface-raised); font: inherit; }
-  .tool-default-field select { height: 38px; padding: 0 11px; font-size: 12px; font-weight: 700; }
+  .tool-advanced-panel input, .tool-advanced-panel textarea { width: 100%; min-width: 0; border: 1px solid var(--color-border); border-radius: 7px; color: var(--color-ink); background: var(--color-surface-raised); font: inherit; }
+  :global(.tool-preset-select .select-menu-trigger) { height: 38px; min-height: 38px; padding: 0 11px; border-color: var(--color-border); font-size: 12px; font-weight: 700; }
   .tool-default-field small { color: var(--color-ink-faint); font-size: 9.5px; font-weight: 500; }
   .tool-usage-callout { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: start; gap: 10px; padding: 10px 11px; border-left: 2px solid var(--color-accent); border-radius: 0 7px 7px 0; background: color-mix(in srgb, var(--color-accent) 6%, transparent); }
   .tool-usage-callout span { color: var(--color-accent); font-size: 9.5px; font-weight: 850; text-transform: uppercase; letter-spacing: .04em; }
diff --git a/src/lib/components/CommitNoteDialog.svelte b/src/lib/components/CommitNoteDialog.svelte
index 0e724a4..5d32642 100644
--- a/src/lib/components/CommitNoteDialog.svelte
+++ b/src/lib/components/CommitNoteDialog.svelte
@@ -11,6 +11,7 @@
     X,
   } from "@lucide/svelte";
   import type { AppLanguage, GitCommit, GitRemote } from "../types";
+  import SelectMenu from "./SelectMenu.svelte";
 
   interface Props {
     commit: GitCommit;
@@ -196,11 +197,7 @@
           <div class="commit-note-sync-controls">
             <label>
               <span>{text.remote}</span>
-              <select bind:value={selectedRemote} disabled={isBusy}>
-                {#each remotes as remote (remote.name)}
-                  <option value={remote.name}>{remote.name}</option>
-                {/each}
-              </select>
+              <SelectMenu value={selectedRemote} options={remotes.map((remote) => ({ value: remote.name, label: remote.name }))} disabled={isBusy} onChange={(value) => { selectedRemote = value; }} />
             </label>
             <button type="button" onclick={() => onFetch(selectedRemote)} disabled={isBusy || !selectedRemote || hasChanges}>
               {#if isBusy}<LoaderCircle class="spin" size={15} aria-hidden="true" />{:else}<Download size={15} aria-hidden="true" />{/if}
diff --git a/src/lib/components/ComparePanel.svelte b/src/lib/components/ComparePanel.svelte
index 714635c..19dc908 100644
--- a/src/lib/components/ComparePanel.svelte
+++ b/src/lib/components/ComparePanel.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
   import { ArrowRight, GitCompare, LoaderCircle } from "@lucide/svelte";
   import type { GitCommit, GitCommitComparison } from "../types";
+  import SelectMenu from "./SelectMenu.svelte";
 
   interface Props {
     commits: GitCommit[];
@@ -40,6 +41,8 @@
     event.preventDefault();
     onCompare();
   }
+
+  let commitOptions = $derived(commits.map((item) => ({ value: item.hash, label: commitOptionLabel(item), group: "Commits" })));
 </script>
 
 <section class="compare-panel panel" aria-label="Compare commits">
@@ -61,32 +64,14 @@
     <form class="compare-form" onsubmit={handleSubmit}>
       <label class="compare-field">
         <span>From (older)</span>
-        <select
-          value={compareFrom}
-          onchange={(e) => onCompareFromChange((e.target as HTMLSelectElement).value)}
-          disabled={isBusy}
-        >
-          <option value="" disabled>Select a commit</option>
-          {#each commits as item (item.hash)}
-            <option value={item.hash}>{commitOptionLabel(item)}</option>
-          {/each}
-        </select>
+        <SelectMenu value={compareFrom} options={commitOptions} placeholder="Select a commit" showSelectedGroup disabled={isBusy} onChange={onCompareFromChange} />
       </label>
 
       <ArrowRight class="compare-arrow" size={18} aria-hidden="true" />
 
       <label class="compare-field">
         <span>To (newer)</span>
-        <select
-          value={compareTo}
-          onchange={(e) => onCompareToChange((e.target as HTMLSelectElement).value)}
-          disabled={isBusy}
-        >
-          <option value="" disabled>Select a commit</option>
-          {#each commits as item (item.hash)}
-            <option value={item.hash}>{commitOptionLabel(item)}</option>
-          {/each}
-        </select>
+        <SelectMenu value={compareTo} options={commitOptions} placeholder="Select a commit" showSelectedGroup disabled={isBusy} onChange={onCompareToChange} />
       </label>
 
       <button class="btn-primary" type="submit" disabled={!canCompare}>
diff --git a/src/lib/components/CompareSelectDialog.svelte b/src/lib/components/CompareSelectDialog.svelte
index c9f605c..5d5be38 100644
--- a/src/lib/components/CompareSelectDialog.svelte
+++ b/src/lib/components/CompareSelectDialog.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
   import { ArrowRight, GitCompare, LoaderCircle, X } from "@lucide/svelte";
   import type { GitBranch, GitCommit } from "../types";
+  import SelectMenu from "./SelectMenu.svelte";
 
   interface Props {
     commits: GitCommit[];
@@ -41,6 +42,11 @@
   let localBranches = $derived(branches.filter((branch) => !branch.remote));
   let remoteBranches = $derived(branches.filter((branch) => branch.remote));
   let targetCount = $derived(branches.length + commits.length);
+  let compareOptions = $derived([
+    ...localBranches.map((branch) => ({ value: branchValue(branch), label: `${branch.name}${branch.current ? " (current)" : ""}`, group: "Branches - Local" })),
+    ...remoteBranches.map((branch) => ({ value: branchValue(branch), label: branch.name, group: "Branches - Remote" })),
+    ...commits.map((item) => ({ value: item.hash, label: commitOptionLabel(item), group: "Commits" })),
+  ]);
 
   function handleSubmit(event: SubmitEvent) {
     event.preventDefault();
@@ -69,68 +75,14 @@
       <form class="compare-form" onsubmit={handleSubmit}>
         <label class="compare-field">
           <span>Base</span>
-          <select
-            value={compareFrom}
-            onchange={(e) => onCompareFromChange((e.target as HTMLSelectElement).value)}
-            disabled={isBusy}
-          >
-            <option value="" disabled>Select a branch or commit</option>
-            {#if localBranches.length > 0}
-              <optgroup label="Local branches">
-                {#each localBranches as branch (branch.name)}
-                  <option value={branchValue(branch)}>{branch.name}{branch.current ? " (current)" : ""}</option>
-                {/each}
-              </optgroup>
-            {/if}
-            {#if remoteBranches.length > 0}
-              <optgroup label="Remote branches">
-                {#each remoteBranches as branch (branch.name)}
-                  <option value={branchValue(branch)}>{branch.name}</option>
-                {/each}
-              </optgroup>
-            {/if}
-            {#if commits.length > 0}
-              <optgroup label="Recent commits">
-                {#each commits as item (item.hash)}
-                  <option value={item.hash}>{commitOptionLabel(item)}</option>
-                {/each}
-              </optgroup>
-            {/if}
-          </select>
+          <SelectMenu class="compare-target-select" value={compareFrom} options={compareOptions} placeholder="Select a branch or commit" showSelectedGroup disabled={isBusy} onChange={onCompareFromChange} />
         </label>
 
         <ArrowRight class="compare-arrow" size={18} aria-hidden="true" />
 
         <label class="compare-field">
           <span>Compare with</span>
-          <select
-            value={compareTo}
-            onchange={(e) => onCompareToChange((e.target as HTMLSelectElement).value)}
-            disabled={isBusy}
-          >
-            <option value="" disabled>Select a branch or commit</option>
-            {#if localBranches.length > 0}
-              <optgroup label="Local branches">
-                {#each localBranches as branch (branch.name)}
-                  <option value={branchValue(branch)}>{branch.name}{branch.current ? " (current)" : ""}</option>
-                {/each}
-              </optgroup>
-            {/if}
-            {#if remoteBranches.length > 0}
-              <optgroup label="Remote branches">
-                {#each remoteBranches as branch (branch.name)}
-                  <option value={branchValue(branch)}>{branch.name}</option>
-                {/each}
-              </optgroup>
-            {/if}
-            {#if commits.length > 0}
-              <optgroup label="Recent commits">
-                {#each commits as item (item.hash)}
-                  <option value={item.hash}>{commitOptionLabel(item)}</option>
-                {/each}
-              </optgroup>
-            {/if}
-          </select>
+          <SelectMenu class="compare-target-select" value={compareTo} options={compareOptions} placeholder="Select a branch or commit" showSelectedGroup disabled={isBusy} onChange={onCompareToChange} />
         </label>
 
         <button class="btn-primary" type="submit" disabled={!canCompare}>
diff --git a/src/lib/components/GlobalSearchDialog.svelte b/src/lib/components/GlobalSearchDialog.svelte
index d3d681a..69947b4 100644
--- a/src/lib/components/GlobalSearchDialog.svelte
+++ b/src/lib/components/GlobalSearchDialog.svelte
@@ -1,4 +1,5 @@
 <script lang="ts">
+  import SelectMenu from "./SelectMenu.svelte";
   import {
     CalendarDays,
     FileCode,
@@ -193,12 +194,7 @@
 
             <label class="search-limit">
               <span>Results</span>
-              <select bind:value={limit} disabled={!hasRepository || isBusy || isSearching}>
-                <option value={100}>100</option>
-                <option value={250}>250</option>
-                <option value={500}>500</option>
-                <option value={1000}>1000</option>
-              </select>
+              <SelectMenu value={String(limit)} options={[100, 250, 500, 1000].map((value) => ({ value: String(value), label: String(value) }))} disabled={!hasRepository || isBusy || isSearching} onChange={(value) => { limit = Number(value); }} />
             </label>
 
             <button class="btn-primary" type="submit" disabled={!hasRepository || isBusy || isSearching || query.trim().length === 0}>
diff --git a/src/lib/components/InteractiveRebaseDialog.svelte b/src/lib/components/InteractiveRebaseDialog.svelte
index ba9eb09..aee208e 100644
--- a/src/lib/components/InteractiveRebaseDialog.svelte
+++ b/src/lib/components/InteractiveRebaseDialog.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
   import { AlertTriangle, ArrowDown, ArrowUp, GitBranch, LoaderCircle, Play, X } from "@lucide/svelte";
   import type { GitBranch as GitBranchInfo, RebaseAction, RebaseCommit, RebasePlanItem } from "../types";
+  import SelectMenu from "./SelectMenu.svelte";
 
   interface PlanRow extends RebaseCommit {
     action: RebaseAction;
@@ -41,6 +42,7 @@
   ));
   let invalidReword = $derived(rows.some((row) => row.action === "reword" && !row.message.trim()));
   let canStart = $derived(Boolean(base) && rows.length > 0 && keptCount > 0 && !invalidSquash && !invalidReword && !isLoading && !isBusy);
+  const rebaseActions: RebaseAction[] = ["pick", "reword", "squash", "fixup", "drop"];
 
   function updateAction(index: number, action: RebaseAction) {
     rows = rows.map((row, rowIndex) => rowIndex === index ? { ...row, action } : row);
@@ -82,12 +84,7 @@
       <section class="rebase-base-bar">
         <label>
           <span>Rebase <strong>{currentBranch || "current branch"}</strong> onto</span>
-          <select value={base} onchange={(event) => onBaseChange((event.target as HTMLSelectElement).value)} disabled={isBusy || isLoading}>
-            <option value="" disabled>Select a base branch</option>
-            {#each availableBases as branch (branch.name)}
-              <option value={branch.name}>{branch.remote ? "Remote · " : "Local · "}{branch.name}</option>
-            {/each}
-          </select>
+          <SelectMenu value={base} options={availableBases.map((branch) => ({ value: branch.name, label: `${branch.remote ? "Remote - " : "Local - "}${branch.name}` }))} placeholder="Select a base branch" disabled={isBusy || isLoading} onChange={onBaseChange} />
         </label>
         <p>Oldest commit first. Reorder commits, then choose how each one should be replayed.</p>
       </section>
@@ -110,9 +107,7 @@
                 <button type="button" onclick={() => move(index, -1)} disabled={isBusy || index === 0} title="Move up"><ArrowUp size={14} aria-hidden="true" /></button>
                 <button type="button" onclick={() => move(index, 1)} disabled={isBusy || index === rows.length - 1} title="Move down"><ArrowDown size={14} aria-hidden="true" /></button>
               </div>
-              <select class={`rebase-action ${row.action}`} value={row.action} onchange={(event) => updateAction(index, (event.target as HTMLSelectElement).value as RebaseAction)} disabled={isBusy} aria-label={`Action for ${row.short_hash}`}>
-                <option value="pick">pick</option><option value="reword">reword</option><option value="squash">squash</option><option value="fixup">fixup</option><option value="drop">drop</option>
-              </select>
+              <SelectMenu class={`rebase-action ${row.action}`} value={row.action} options={rebaseActions.map((action) => ({ value: action, label: action }))} disabled={isBusy} ariaLabel={`Action for ${row.short_hash}`} onChange={(value) => updateAction(index, value as RebaseAction)} />
               <code>{row.short_hash}</code>
               <div class="rebase-commit-copy">
                 {#if row.action === "reword"}
diff --git a/src/lib/components/SelectMenu.svelte b/src/lib/components/SelectMenu.svelte
new file mode 100644
index 0000000..5838dd6
--- /dev/null
+++ b/src/lib/components/SelectMenu.svelte
@@ -0,0 +1,176 @@
+<script lang="ts">
+  import { tick } from "svelte";
+  import { Check, ChevronDown } from "@lucide/svelte";
+
+  export interface SelectMenuOption {
+    value: string;
+    label: string;
+    group?: string;
+    disabled?: boolean;
+  }
+
+  interface Props {
+    value: string;
+    options: SelectMenuOption[];
+    placeholder?: string;
+    disabled?: boolean;
+    ariaLabel?: string;
+    class?: string;
+    showSelectedGroup?: boolean;
+    onChange: (value: string) => void;
+  }
+
+  let {
+    value,
+    options = [],
+    placeholder = "Select an option",
+    disabled = false,
+    ariaLabel = "",
+    class: className = "",
+    showSelectedGroup = false,
+    onChange,
+  }: Props = $props();
+
+  let root = $state<HTMLDivElement>();
+  let trigger = $state<HTMLButtonElement>();
+  let open = $state(false);
+  let activeIndex = $state(-1);
+  let menuStyle = $state("");
+  const menuId = `select-menu-${Math.random().toString(36).slice(2)}`;
+
+  let selectedOption = $derived(options.find((option) => option.value === value));
+  let enabledIndices = $derived(options.map((option, index) => option.disabled ? -1 : index).filter((index) => index >= 0));
+
+  function groupCount(group: string): number {
+    return options.filter((option) => option.group === group).length;
+  }
+
+  function positionMenu() {
+    if (!trigger) return;
+    const rect = trigger.getBoundingClientRect();
+    const viewportGap = 8;
+    const menuGap = 5;
+    const desiredHeight = Math.min(300, options.length * 34 + 24);
+    const spaceBelow = window.innerHeight - rect.bottom - viewportGap;
+    const spaceAbove = rect.top - viewportGap;
+    const openAbove = spaceBelow < Math.min(desiredHeight, 180) && spaceAbove > spaceBelow;
+    const maxHeight = Math.max(96, Math.min(desiredHeight, openAbove ? spaceAbove - menuGap : spaceBelow - menuGap));
+    const width = Math.max(rect.width, 180);
+    const left = Math.min(rect.left, window.innerWidth - width - viewportGap);
+    const top = openAbove ? rect.top - menuGap : rect.bottom + menuGap;
+    menuStyle = `left:${Math.max(viewportGap, left)}px;${openAbove ? `bottom:${window.innerHeight - top}px;` : `top:${top}px;`}min-width:${width}px;max-width:${Math.max(180, window.innerWidth - viewportGap * 2)}px;max-height:${maxHeight}px;`;
+  }
+
+  async function show() {
+    if (disabled || enabledIndices.length === 0) return;
+    const selectedIndex = options.findIndex((option) => option.value === value && !option.disabled);
+    activeIndex = selectedIndex >= 0 ? selectedIndex : enabledIndices[0];
+    open = true;
+    await tick();
+    positionMenu();
+    document.getElementById(`${menuId}-option-${activeIndex}`)?.scrollIntoView({ block: "nearest" });
+  }
+
+  function close() {
+    open = false;
+  }
+
+  function choose(index: number) {
+    const option = options[index];
+    if (!option || option.disabled) return;
+    onChange(option.value);
+    close();
+    trigger?.focus();
+  }
+
+  function moveActive(direction: -1 | 1) {
+    if (enabledIndices.length === 0) return;
+    const current = enabledIndices.indexOf(activeIndex);
+    const next = current < 0
+      ? (direction > 0 ? 0 : enabledIndices.length - 1)
+      : (current + direction + enabledIndices.length) % enabledIndices.length;
+    activeIndex = enabledIndices[next];
+    document.getElementById(`${menuId}-option-${activeIndex}`)?.scrollIntoView({ block: "nearest" });
+  }
+
+  function handleKeydown(event: KeyboardEvent) {
+    if (disabled) return;
+    if (!open && ["ArrowDown", "ArrowUp", "Enter", " "].includes(event.key)) {
+      event.preventDefault();
+      void show();
+      return;
+    }
+    if (!open) return;
+    if (event.key === "ArrowDown" || event.key === "ArrowUp") {
+      event.preventDefault();
+      moveActive(event.key === "ArrowDown" ? 1 : -1);
+    } else if (event.key === "Home" || event.key === "End") {
+      event.preventDefault();
+      activeIndex = event.key === "Home" ? enabledIndices[0] : enabledIndices[enabledIndices.length - 1];
+    } else if (event.key === "Enter" || event.key === " ") {
+      event.preventDefault();
+      choose(activeIndex);
+    } else if (event.key === "Escape" || event.key === "Tab") {
+      if (event.key === "Escape") {
+        event.preventDefault();
+        event.stopPropagation();
+      }
+      close();
+    }
+  }
+
+  function handleWindowPointerDown(event: PointerEvent) {
+    if (open && root && !root.contains(event.target as Node)) close();
+  }
+</script>
+
+<svelte:window onpointerdown={handleWindowPointerDown} onresize={positionMenu} onscroll={positionMenu} />
+
+<div class={`select-menu ${className}`} class:open bind:this={root}>
+  <button
+    bind:this={trigger}
+    class="select-menu-trigger"
+    type="button"
+    {disabled}
+    aria-label={ariaLabel || undefined}
+    aria-haspopup="listbox"
+    aria-expanded={open}
+    aria-controls={open ? menuId : undefined}
+    onclick={() => open ? close() : void show()}
+    onkeydown={handleKeydown}
+  >
+    <span class="select-menu-value" class:placeholder={!selectedOption} title={selectedOption?.label}>
+      {#if showSelectedGroup && selectedOption?.group}<small>{selectedOption.group}</small>{/if}
+      <span>{selectedOption?.label ?? placeholder}</span>
+    </span>
+    <ChevronDown size={14} aria-hidden="true" />
+  </button>
+
+  {#if open}
+    <div id={menuId} class="select-menu-popup" style={menuStyle} role="listbox" aria-label={ariaLabel || undefined}>
+      {#each options as option, index (`${option.value}:${index}`)}
+        {#if option.group && (index === 0 || options[index - 1]?.group !== option.group)}
+          <div class="select-menu-group" role="presentation">
+            <span>{option.group}</span>
+            <small>{groupCount(option.group)}</small>
+          </div>
+        {/if}
+        <button
+          id={`${menuId}-option-${index}`}
+          class="select-menu-option"
+          class:active={index === activeIndex}
+          class:selected={option.value === value}
+          type="button"
+          role="option"
+          aria-selected={option.value === value}
+          disabled={option.disabled}
+          onmouseenter={() => { if (!option.disabled) activeIndex = index; }}
+          onclick={() => choose(index)}
+        >
+          <span>{option.label}</span>
+          {#if option.value === value}<Check size={14} aria-hidden="true" />{/if}
+        </button>
+      {/each}
+    </div>
+  {/if}
+</div>
diff --git a/src/lib/components/SyncSettingsDialog.svelte b/src/lib/components/SyncSettingsDialog.svelte
index 34823cb..81d8d40 100644
--- a/src/lib/components/SyncSettingsDialog.svelte
+++ b/src/lib/components/SyncSettingsDialog.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
   import { Cloud, GitBranch, Plus, Save, Trash2, X } from "@lucide/svelte";
   import type { GitRemote, PullStrategy } from "../types";
+  import SelectMenu from "./SelectMenu.svelte";
 
   export let remotes: GitRemote[] = [];
   export let remoteBranches: string[] = [];
@@ -76,8 +77,8 @@
         </div>
 
         <div class="sync-fields">
-          <label><span>{de ? "Remote für Sync" : "Remote used for sync"}</span><select bind:value={draftRemote}><option value="">{de ? "Automatisch wählen" : "Choose automatically"}</option>{#each remotes as remote}<option value={remote.name}>{remote.name}</option>{/each}</select><small>{de ? "Ein Remote ist die gespeicherte Verbindung zu einem Server-Repository." : "A remote is a saved connection to a repository on a server."}</small></label>
-          <label><span>{de ? `Upstream für ${currentBranch || "aktuellen Branch"}` : `Upstream for ${currentBranch || "current branch"}`}</span><select bind:value={draftUpstream}><option value="">{de ? "Kein Upstream" : "No upstream"}</option>{#each remoteBranches as branch}<option value={branch}>{branch}</option>{/each}</select><small>{de ? "Der Upstream ist der Remote-Branch, mit dem Pull, Push und Ahead/Behind verglichen werden." : "The upstream is the remote branch used by Pull, Push, and Ahead/Behind."}</small></label>
+          <label><span>{de ? "Remote für Sync" : "Remote used for sync"}</span><SelectMenu value={draftRemote} options={[{ value: "", label: de ? "Automatisch wählen" : "Choose automatically" }, ...remotes.map((remote) => ({ value: remote.name, label: remote.name }))]} onChange={(value) => { draftRemote = value; }} /><small>{de ? "Ein Remote ist die gespeicherte Verbindung zu einem Server-Repository." : "A remote is a saved connection to a repository on a server."}</small></label>
+          <label><span>{de ? `Upstream für ${currentBranch || "aktuellen Branch"}` : `Upstream for ${currentBranch || "current branch"}`}</span><SelectMenu value={draftUpstream} options={[{ value: "", label: de ? "Kein Upstream" : "No upstream" }, ...remoteBranches.map((branch) => ({ value: branch, label: branch }))]} onChange={(value) => { draftUpstream = value; }} /><small>{de ? "Der Upstream ist der Remote-Branch, mit dem Pull, Push und Ahead/Behind verglichen werden." : "The upstream is the remote branch used by Pull, Push, and Ahead/Behind."}</small></label>
         </div>
       </section>
 
diff --git a/src/lib/components/WorktreeDialog.svelte b/src/lib/components/WorktreeDialog.svelte
index a4c7d72..a37242b 100644
--- a/src/lib/components/WorktreeDialog.svelte
+++ b/src/lib/components/WorktreeDialog.svelte
@@ -21,6 +21,7 @@
     X,
   } from "@lucide/svelte";
   import type { GitBranch as GitBranchInfo, GitWorktree } from "../types";
+  import SelectMenu from "./SelectMenu.svelte";
 
   type CreateMode = "existing" | "new" | "detached";
 
@@ -260,12 +261,17 @@
             {#if createMode === "existing"}
               <label>
                 <span>Branch</span>
-                <select bind:value={selectedBranch} disabled={isBusy}>
-                  <option value="" disabled>Select a local branch</option>
-                  {#each localBranches as branch (branch.name)}
-                    <option value={branch.name} disabled={!branchAvailable(branch.name)}>{branch.name}{!branchAvailable(branch.name) ? " (already checked out)" : ""}</option>
-                  {/each}
-                </select>
+                <SelectMenu
+                  value={selectedBranch}
+                  placeholder="Select a local branch"
+                  options={localBranches.map((branch) => ({
+                    value: branch.name,
+                    label: `${branch.name}${!branchAvailable(branch.name) ? " (already checked out)" : ""}`,
+                    disabled: !branchAvailable(branch.name),
+                  }))}
+                  disabled={isBusy}
+                  onChange={(value) => { selectedBranch = value; }}
+                />
               </label>
             {:else if createMode === "new"}
               <label>