diff --git a/src/components/TimerSaveDialog.vue b/src/components/TimerSaveDialog.vue
new file mode 100644
index 0000000..d7e70e1
--- /dev/null
+++ b/src/components/TimerSaveDialog.vue
@@ -0,0 +1,159 @@
+<script setup lang="ts">
+import { ref, computed, watch, nextTick, onUnmounted } from 'vue'
+import { useFocusTrap } from '../utils/focusTrap'
+import { useAnnouncer } from '../composables/useAnnouncer'
+import AppSelect from './AppSelect.vue'
+import { useProjectsStore } from '../stores/projects'
+import { X } from 'lucide-vue-next'
+
+const props = defineProps<{
+  show: boolean
+  elapsedSeconds: number
+  mode: 'no-project' | 'long-timer'
+}>()
+
+const emit = defineEmits<{
+  save: [projectId: number, description: string]
+  discard: []
+  cancel: []
+}>()
+
+const projectsStore = useProjectsStore()
+const { activate: activateTrap, deactivate: deactivateTrap } = useFocusTrap()
+const { announce } = useAnnouncer()
+const dialogRef = ref<HTMLElement | null>(null)
+const selectedProjectId = ref<number | null>(null)
+const description = ref('')
+
+const formattedDuration = computed(() => {
+  const h = Math.floor(props.elapsedSeconds / 3600)
+  const m = Math.floor((props.elapsedSeconds % 3600) / 60)
+  const parts: string[] = []
+  if (h > 0) parts.push(`${h} hour${h !== 1 ? 's' : ''}`)
+  if (m > 0) parts.push(`${m} minute${m !== 1 ? 's' : ''}`)
+  return parts.join(' and ') || 'less than a minute'
+})
+
+const spokenDuration = computed(() => formattedDuration.value)
+
+watch(() => props.show, async (val) => {
+  if (val) {
+    selectedProjectId.value = null
+    description.value = ''
+    await nextTick()
+    if (dialogRef.value) {
+      activateTrap(dialogRef.value, { onDeactivate: () => emit('cancel') })
+    }
+    if (props.mode === 'no-project') {
+      announce(`Timer stopped. Select a project to save ${spokenDuration.value} of tracked time.`)
+    } else {
+      announce(`Timer has been running for ${spokenDuration.value}. Stop and save?`)
+    }
+  } else {
+    deactivateTrap()
+  }
+})
+
+onUnmounted(() => deactivateTrap())
+
+function handleSave() {
+  if (!selectedProjectId.value) return
+  emit('save', selectedProjectId.value, description.value)
+}
+</script>
+
+<template>
+  <Teleport to="body">
+    <Transition name="modal">
+      <div
+        v-if="show"
+        class="fixed inset-0 bg-black/70 backdrop-blur-[4px] flex items-center justify-center p-4 z-50"
+        @click.self="$emit('cancel')"
+      >
+        <div
+          ref="dialogRef"
+          role="alertdialog"
+          aria-modal="true"
+          aria-labelledby="timer-save-title"
+          aria-describedby="timer-save-desc"
+          class="bg-bg-surface border border-border-subtle rounded-lg shadow-[0_1px_3px_rgba(0,0,0,0.3)] w-full max-w-md p-6"
+        >
+          <div class="flex items-center justify-between mb-4">
+            <h2 id="timer-save-title" class="text-[1.125rem] font-semibold font-[family-name:var(--font-heading)] text-text-primary">
+              {{ mode === 'no-project' ? 'Save Entry' : 'Long Timer' }}
+            </h2>
+            <button
+              @click="$emit('cancel')"
+              class="p-1 text-text-tertiary hover:text-text-primary transition-colors focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-accent"
+              aria-label="Close"
+            >
+              <X class="w-4 h-4" aria-hidden="true" />
+            </button>
+          </div>
+
+          <p id="timer-save-desc" class="text-[0.8125rem] text-text-secondary mb-4">
+            <template v-if="mode === 'no-project'">
+              No project was selected. Choose a project to save your tracked time.
+            </template>
+            <template v-else>
+              The timer has been running for a long time. Would you like to stop and save?
+            </template>
+          </p>
+
+          <div class="mb-4 px-3 py-2 bg-bg-inset rounded-lg">
+            <span class="text-[0.6875rem] text-text-tertiary uppercase tracking-[0.08em]">Duration</span>
+            <p class="text-[1.25rem] font-[family-name:var(--font-timer)] text-accent-text font-medium" :aria-label="spokenDuration">
+              {{ formattedDuration }}
+            </p>
+          </div>
+
+          <div v-if="mode === 'no-project'" class="space-y-3 mb-6">
+            <div>
+              <label class="block text-[0.6875rem] text-text-tertiary uppercase tracking-[0.08em] mb-1.5">Project *</label>
+              <AppSelect
+                v-model="selectedProjectId"
+                :options="projectsStore.projects"
+                label-key="name"
+                value-key="id"
+                placeholder="Select project"
+              />
+            </div>
+            <div>
+              <label for="timer-save-desc-input" class="block text-[0.6875rem] text-text-tertiary uppercase tracking-[0.08em] mb-1.5">Description</label>
+              <input
+                id="timer-save-desc-input"
+                v-model="description"
+                type="text"
+                class="w-full px-3 py-2 bg-bg-inset border border-border-subtle rounded-lg text-[0.8125rem] text-text-primary focus:outline-none focus:border-border-visible"
+                placeholder="What did you work on?"
+              />
+            </div>
+          </div>
+
+          <div class="flex justify-end gap-2">
+            <button
+              @click="$emit('discard')"
+              class="px-4 py-2 text-[0.8125rem] text-text-secondary border border-border-subtle rounded-lg hover:bg-bg-elevated transition-colors focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-accent"
+            >
+              Discard
+            </button>
+            <button
+              v-if="mode === 'long-timer'"
+              @click="$emit('cancel')"
+              class="px-4 py-2 text-[0.8125rem] text-text-secondary border border-border-subtle rounded-lg hover:bg-bg-elevated transition-colors focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-accent"
+            >
+              Keep Running
+            </button>
+            <button
+              @click="handleSave"
+              :disabled="mode === 'no-project' && !selectedProjectId"
+              class="px-4 py-2 text-[0.8125rem] bg-accent text-bg-base rounded-lg hover:bg-accent-hover transition-colors disabled:opacity-40 disabled:cursor-not-allowed focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-accent"
+            >
+              {{ mode === 'long-timer' ? 'Stop & Save' : 'Save' }}
+            </button>
+          </div>
+        </div>
+      </div>
+    </Transition>
+  </Teleport>
+</template>