diff --git a/ui/src/components/calendar/ViewCalendarEvent.vue b/ui/src/components/calendar/ViewCalendarEvent.vue
new file mode 100644
index 0000000..6035542
--- /dev/null
+++ b/ui/src/components/calendar/ViewCalendarEvent.vue
@@ -0,0 +1,105 @@
+<script setup lang="ts">
+import type { CalendarEvent } from '@shared/types/calendar'
+import { Clock, MapPin, User, X } from 'lucide-vue-next';
+import { computed } from 'vue';
+import ButtonGroup from '../ui/button-group/ButtonGroup.vue';
+import Button from '../ui/button/Button.vue';
+
+const props = defineProps<{
+    event: CalendarEvent | null
+    onClose?: () => void
+}>()
+
+const emit = defineEmits<{
+    (e: 'close'): void
+}>()
+
+const activeEvent = computed(() => props.event)
+
+const startFmt = new Intl.DateTimeFormat(undefined, {
+    weekday: 'short', year: 'numeric', month: 'short', day: 'numeric',
+    hour: 'numeric', minute: '2-digit'
+})
+const endFmt = new Intl.DateTimeFormat(undefined, {
+    hour: 'numeric', minute: '2-digit'
+})
+
+const whenText = computed(() => {
+    if (!activeEvent.value?.start) return ''
+    const s = new Date(activeEvent.value.start)
+    const e = activeEvent.value?.end ? new Date(activeEvent.value.end) : null
+    return e
+        ? `${startFmt.format(s)} – ${endFmt.format(e)}`
+        : `${startFmt.format(s)}`
+})
+</script>
+
+<template>
+    <div>
+        <!-- Header -->
+        <div class="flex items-center justify-between gap-3 border-b px-4 py-3">
+            <h2 class="text-lg font-semibold break-all">
+                {{ activeEvent?.name || 'Event' }}
+            </h2>
+            <button
+                class="inline-flex flex-none size-8 items-center justify-center rounded-md border hover:bg-muted/40 transition"
+                aria-label="Close" @click="emit('close')">
+                <X class="size-4" />
+            </button>
+        </div>
+        <!-- Body -->
+        <div class="flex-1 min-h-0 overflow-y-auto px-4 py-4 space-y-6">
+            <section>
+                <ButtonGroup>
+                    <Button variant="outline">Going</Button>
+                    <Button variant="outline">Maybe</Button>
+                    <Button variant="outline">Declined</Button>
+                </ButtonGroup>
+            </section>
+            <!-- When -->
+            <section v-if="whenText" class="space-y-2">
+                <div class="inline-flex items-center gap-2 rounded-md border px-2.5 py-1.5 text-sm">
+                    <Clock class="size-4 opacity-80" />
+                    <span class="font-medium">{{ whenText }}</span>
+                </div>
+            </section>
+            <!-- Quick meta chips -->
+            <section class="flex flex-wrap gap-2">
+                <span class="inline-flex items-center gap-1.5 rounded-md border px-2 py-1 text-xs">
+                    <MapPin class="size-3.5 opacity-80" />
+                    <span class="font-medium">{{ activeEvent.location || "Unknown" }}</span>
+                </span>
+                <span class="inline-flex items-center gap-1.5 rounded-md border px-2 py-1 text-xs">
+                    <User class="size-3.5 opacity-80" />
+                    <span class="font-medium">Created by: {{ activeEvent.creator_name || "Unknown User"
+                        }}</span>
+                </span>
+            </section>
+            <!-- Description -->
+            <section class="space-y-2">
+                <p class="text-lg font-semibold">Description</p>
+                <p class="border bg-muted/50 px-3 py-2 rounded-lg min-h-24 my-2">
+                    {{ activeEvent.description }}
+                </p>
+            </section>
+            <!-- Attendance -->
+            <section class="space-y-2">
+                <p class="text-lg font-semibold">Attendance</p>
+                <!-- <p class="border bg-muted/50 px-3 py-2 rounded-lg min-h-24 my-2">
+                            {{ activeEvent.description }}
+                        </p> -->
+            </section>
+        </div>
+        <!-- Footer (optional actions) -->
+        <div class="border-t px-4 py-3 flex items-center justify-end gap-2">
+            <button class="rounded-md border px-3 py-1.5 text-sm hover:bg-muted/40 transition">
+                Edit
+            </button>
+            <button
+                class="rounded-md bg-primary text-primary-foreground px-3 py-1.5 text-sm hover:opacity-90 transition">
+                Open details
+            </button>
+        </div>
+
+    </div>
+</template>
\ No newline at end of file
diff --git a/ui/src/components/ui/button-group/ButtonGroup.vue b/ui/src/components/ui/button-group/ButtonGroup.vue
new file mode 100644
index 0000000..21b93d3
--- /dev/null
+++ b/ui/src/components/ui/button-group/ButtonGroup.vue
@@ -0,0 +1,22 @@
+<script setup>
+import { cn } from "@/lib/utils";
+import { buttonGroupVariants } from ".";
+
+const props = defineProps({
+  class: { type: null, required: false },
+  orientation: { type: null, required: false },
+});
+</script>
+
+<template>
+  <div
+    role="group"
+    data-slot="button-group"
+    :data-orientation="props.orientation"
+    :class="
+      cn(buttonGroupVariants({ orientation: props.orientation }), props.class)
+    "
+  >
+    <slot />
+  </div>
+</template>
diff --git a/ui/src/components/ui/button-group/ButtonGroupSeparator.vue b/ui/src/components/ui/button-group/ButtonGroupSeparator.vue
new file mode 100644
index 0000000..4fdcdc4
--- /dev/null
+++ b/ui/src/components/ui/button-group/ButtonGroupSeparator.vue
@@ -0,0 +1,28 @@
+<script setup>
+import { reactiveOmit } from "@vueuse/core";
+import { cn } from "@/lib/utils";
+import { Separator } from '@/components/ui/separator';
+
+const props = defineProps({
+  orientation: { type: String, required: false, default: "vertical" },
+  decorative: { type: Boolean, required: false },
+  asChild: { type: Boolean, required: false },
+  as: { type: null, required: false },
+  class: { type: null, required: false },
+});
+const delegatedProps = reactiveOmit(props, "class");
+</script>
+
+<template>
+  <Separator
+    data-slot="button-group-separator"
+    v-bind="delegatedProps"
+    :orientation="props.orientation"
+    :class="
+      cn(
+        'bg-input relative !m-0 self-stretch data-[orientation=vertical]:h-auto',
+        props.class,
+      )
+    "
+  />
+</template>
diff --git a/ui/src/components/ui/button-group/ButtonGroupText.vue b/ui/src/components/ui/button-group/ButtonGroupText.vue
new file mode 100644
index 0000000..489cfe7
--- /dev/null
+++ b/ui/src/components/ui/button-group/ButtonGroupText.vue
@@ -0,0 +1,29 @@
+<script setup>
+import { Primitive } from "reka-ui";
+import { cn } from "@/lib/utils";
+
+const props = defineProps({
+  class: { type: null, required: false },
+  orientation: { type: null, required: false },
+  asChild: { type: Boolean, required: false },
+  as: { type: null, required: false, default: "div" },
+});
+</script>
+
+<template>
+  <Primitive
+    role="group"
+    data-slot="button-group"
+    :data-orientation="props.orientation"
+    :as="as"
+    :as-child="asChild"
+    :class="
+      cn(
+        'bg-muted flex items-center gap-2 rounded-md border px-4 text-sm font-medium shadow-xs [&_svg]:pointer-events-none [&_svg:not([class*=\'size-\'])]:size-4',
+        props.class,
+      )
+    "
+  >
+    <slot />
+  </Primitive>
+</template>
diff --git a/ui/src/components/ui/button-group/index.js b/ui/src/components/ui/button-group/index.js
new file mode 100644
index 0000000..d9676c3
--- /dev/null
+++ b/ui/src/components/ui/button-group/index.js
@@ -0,0 +1,22 @@
+import { cva } from "class-variance-authority";
+
+export { default as ButtonGroup } from "./ButtonGroup.vue";
+export { default as ButtonGroupSeparator } from "./ButtonGroupSeparator.vue";
+export { default as ButtonGroupText } from "./ButtonGroupText.vue";
+
+export const buttonGroupVariants = cva(
+  "flex w-fit items-stretch [&>*]:focus-visible:z-10 [&>*]:focus-visible:relative [&>[data-slot=select-trigger]:not([class*='w-'])]:w-fit [&>input]:flex-1 has-[select[aria-hidden=true]:last-child]:[&>[data-slot=select-trigger]:last-of-type]:rounded-r-md has-[>[data-slot=button-group]]:gap-2",
+  {
+    variants: {
+      orientation: {
+        horizontal:
+          "[&>*:not(:first-child)]:rounded-l-none [&>*:not(:first-child)]:border-l-0 [&>*:not(:last-child)]:rounded-r-none",
+        vertical:
+          "flex-col [&>*:not(:first-child)]:rounded-t-none [&>*:not(:first-child)]:border-t-0 [&>*:not(:last-child)]:rounded-b-none",
+      },
+    },
+    defaultVariants: {
+      orientation: "horizontal",
+    },
+  },
+);
diff --git a/ui/src/pages/Calendar.vue b/ui/src/pages/Calendar.vue
index 1ad7875..459017e 100644
--- a/ui/src/pages/Calendar.vue
+++ b/ui/src/pages/Calendar.vue
@@ -8,6 +8,7 @@ import CreateCalendarEvent from '@/components/calendar/CreateCalendarEvent.vue'
 import { getCalendarEvent, getMonthCalendarEvents } from '@/api/calendar'
 import { CalendarEvent, CalendarEventShort } from '@shared/types/calendar'
 import { Calendar } from '@fullcalendar/core'
+import ViewCalendarEvent from '@/components/calendar/ViewCalendarEvent.vue'
 
 const monthLabels = [
     'January', 'February', 'March', 'April', 'May', 'June',
@@ -87,7 +88,7 @@ const calendarRef = ref<InstanceType<typeof FullCalendar> | null>(null)
 async function onEventClick(arg: any) {
     const targetEvent = arg.event.id;
     activeEvent.value = await getCalendarEvent(targetEvent);
-    console.log(activeEvent.value); 
+    console.log(activeEvent.value);
     // activeEvent.value = {
     //     id: arg.event.id,
     //     title: arg.event.title,
@@ -176,24 +177,6 @@ watch(panelOpen, async () => {
 })
 
 
-
-const startFmt = new Intl.DateTimeFormat(undefined, {
-    weekday: 'short', year: 'numeric', month: 'short', day: 'numeric',
-    hour: 'numeric', minute: '2-digit'
-})
-const endFmt = new Intl.DateTimeFormat(undefined, {
-    hour: 'numeric', minute: '2-digit'
-})
-
-const whenText = computed(() => {
-    if (!activeEvent.value?.start) return ''
-    const s = new Date(activeEvent.value.start)
-    const e = activeEvent.value?.end ? new Date(activeEvent.value.end) : null
-    return e
-        ? `${startFmt.format(s)} – ${endFmt.format(e)}`
-        : `${startFmt.format(s)}`
-})
-
 function onCreateEvent() {
     const iso = new Date().toISOString().slice(0, 10) // YYYY-MM-DD
     onDateClick({ dateStr: iso })
@@ -262,82 +245,10 @@ onMounted(() => {
                     <FullCalendar ref="calendarRef" :options="calendarOptions" />
                 </div>
             </div>
-            <aside v-if="panelOpen && activeEvent" class="3xl:w-lg 2xl:w-md border-l bg-card text-foreground flex flex-col"
+            <aside v-if="panelOpen && activeEvent"
+                class="3xl:w-lg 2xl:w-md border-l bg-card text-foreground flex flex-col"
                 :style="{ height: 'calc(100vh - 61px)', position: 'sticky', top: '64px' }">
-                <!-- Header -->
-                <div class="flex items-center justify-between gap-3 border-b px-4 py-3">
-                    <h2 class="text-lg font-semibold break-all">
-                        {{ activeEvent?.name || 'Event' }}
-                    </h2>
-                    <button
-                        class="inline-flex flex-none size-8 items-center justify-center rounded-md border hover:bg-muted/40 transition"
-                        aria-label="Close" @click="panelOpen = false">
-                        <X class="size-4" />
-                    </button>
-                </div>
-                <!-- Body -->
-                <div class="flex-1 min-h-0 overflow-y-auto px-4 py-4 space-y-6">
-                    <!-- When -->
-                    <section v-if="whenText" class="space-y-2">
-                        <div class="inline-flex items-center gap-2 rounded-md border px-2.5 py-1.5 text-sm">
-                            <Clock class="size-4 opacity-80" />
-                            <span class="font-medium">{{ whenText }}</span>
-                        </div>
-                    </section>
-                    <!-- Quick meta chips -->
-                    <section class="flex flex-wrap gap-2">
-                        <span
-                            class="inline-flex items-center gap-1.5 rounded-md border px-2 py-1 text-xs">
-                            <MapPin class="size-3.5 opacity-80" />
-                            <span class="font-medium">{{ activeEvent.location || "Unknown" }}</span>
-                        </span>
-                        <span
-                            class="inline-flex items-center gap-1.5 rounded-md border px-2 py-1 text-xs">
-                            <User class="size-3.5 opacity-80" />
-                            <span class="font-medium">Created by: {{ activeEvent.creator_name || "Unknown User" }}</span>
-                        </span>
-                    </section>
-                    <!-- Agenda (special-cased array) -->
-                    <!-- <section v-if="Array.isArray(ext.agenda) && ext.agenda.length" class="space-y-2">
-                        <div class="flex items-center gap-2 text-sm font-medium">
-                            <ListTodo class="size-4 opacity-80" />
-                            Agenda
-                        </div>
-                        <ul class="space-y-1.5">
-                            <li v-for="(item, i) in ext.agenda" :key="i" class="flex items-start gap-2 text-sm">
-                                <span class="mt-1.5 size-1.5 rounded-full bg-foreground/50"></span>
-                                <span>{{ item }}</span>
-                            </li>
-                        </ul>
-                    </section> -->
-                    <!-- Generic details (extendedProps minus the ones above) -->
-                    <!-- <section v-if="ext && Object.keys(ext).length" class="space-y-3">
-                        <div class="text-sm font-medium opacity-80">Details</div>
-                        <dl class="grid grid-cols-1 gap-y-3">
-                            <template v-for="(val, key) in ext" :key="key">
-                                <template v-if="!['agenda', 'owner', 'trainer', 'location'].includes(String(key))">
-                                    <div class="grid grid-cols-[120px_1fr] items-start gap-3">
-                                        <dt class="text-xs uppercase tracking-wide opacity-60">{{ key }}</dt>
-                                        <dd class="text-sm">
-                                            <span v-if="Array.isArray(val)">{{ val.join(', ') }}</span>
-                                            <span v-else>{{ String(val) }}</span>
-                                        </dd>
-                                    </div>
-                                </template>
-                            </template>
-                        </dl>
-                    </section> -->
-                </div>
-                <!-- Footer (optional actions) -->
-                <div class="border-t px-4 py-3 flex items-center justify-end gap-2">
-                    <button class="rounded-md border px-3 py-1.5 text-sm hover:bg-muted/40 transition">
-                        Edit
-                    </button>
-                    <button
-                        class="rounded-md bg-primary text-primary-foreground px-3 py-1.5 text-sm hover:opacity-90 transition">
-                        Open details
-                    </button>
-                </div>
+                <ViewCalendarEvent @close="() => {panelOpen = false; activeEvent = null;}" :event="activeEvent"></ViewCalendarEvent>
             </aside>
         </div>
     </div>