diff --git a/src/App.css b/src/App.css
index 4c4f081..2a524e1 100644
--- a/src/App.css
+++ b/src/App.css
@@ -1,11 +1,56 @@
 button {
-  padding: 0 2%;
-  font-size: 2vw;
+  border: 1px solid rgb(79, 79, 79);
+  border-radius: 5px;
+  padding: 1%;
+  white-space: nowrap;
   cursor: pointer;
 }
 
+.bigBtn {
+  font-size: 2vw;
+}
+
+.midBtn {
+  font-size: 1.2vw;
+}
+
+.input {
+  width: 100%;
+  padding: 1%;
+  border: 1px solid red;
+  border-radius: 5px;
+  outline: none;
+  color: white;
+  background-color: black;
+}
+
+.sub-container {
+  width: 100%;
+  border: 1px solid red;
+  border-radius: 10px;
+  padding: 10px;
+  display: flex;
+  flex-direction: column;
+  row-gap: 12px;
+}
+
+.counter-stats {
+  font-size: 24px;
+  font-weight: 700;
+}
+
+.ul {
+  width: 95%;
+  align-self: flex-end;
+}
+
+.li {
+  padding: 5px 0;
+  font-size: 0.8rem;
+}
+
 .hide {
-  display: none;
+  display: none !important;
 }
 
 li {
@@ -23,12 +68,15 @@ li {
 .Todos,
 .Doing,
 .Done {
-  width: 33%;
+  width: 100%;
   border: 1px solid red;
-  border-radius: 15px;
+  border-radius: 20px;
+  padding: 5px;
   display: flex;
   flex-direction: column;
+  row-gap: 1%;
   align-items: center;
+  overflow-y: auto;
 }
 
 @media (width <= 720px) {
@@ -41,6 +89,7 @@ li {
   .Doing,
   .Done {
     width: 100%;
+    overflow-y: visible;
   }
 
   .Todos {
diff --git a/src/doing/Doing.css b/src/doing/Doing.css
index 1acb9a9..0afc9c3 100644
--- a/src/doing/Doing.css
+++ b/src/doing/Doing.css
@@ -1,19 +1,9 @@
-.Doing {
-  padding: 5px;
-  row-gap: 100px;
-}
-
-.pomodoro {
-  width: 100%;
-  padding: 5px;
-  display: flex;
-  flex-direction: column;
-  justify-content: center;
+.Doing .pomodoro {
   align-items: center;
   row-gap: 50px;
 }
 
-.clock {
+.Doing .clock {
   width: fit-content;
   border: 1px solid red;
   border-radius: 20px;
@@ -23,24 +13,24 @@
   font-family: 'CustomFont', monospace;
 }
 
-.controls {
+.Doing .controls {
   width: 100%;
   justify-content: center;
   display: flex;
   column-gap: 10px;
 }
 
-.motivational {
+.Doing .motivational {
   cursor: pointer;
   display: flex;
   flex-direction: column;
   row-gap: 10px;
 }
 
-.motivational p:first-of-type {
+.Doing .motivational p:first-of-type {
   font-style: italic;
 }
 
-.motivational p:last-of-type {
+.Doing .motivational p:last-of-type {
   font-size: 0.7rem;
 }
diff --git a/src/doing/Doing.jsx b/src/doing/Doing.jsx
index fcf1639..aca66a1 100644
--- a/src/doing/Doing.jsx
+++ b/src/doing/Doing.jsx
@@ -71,7 +71,7 @@ export const Doing = () => {
   return (
     <div className='Doing'>
       <h1>Doing</h1>
-      <div className="pomodoro">
+      <div className="pomodoro sub-container">
         <div className="clock">
           <Countdown
             ref={countdownRef}
@@ -81,9 +81,9 @@ export const Doing = () => {
           />
         </div>
         <div className="controls">
-          <button className={`${viewStartBtn} start`} onClick={handleStartClick}>{textStartBtn}</button>
-          <button className={`${viewPauseBtn} pause`} onClick={handlePauseClick}>PAUSE</button>
-          <button className={`${viewResetBtn} reset`} onClick={() => handleResetClick(true)}>RESET</button>
+          <button className={`${viewStartBtn} start bigBtn`} onClick={handleStartClick}>{textStartBtn}</button>
+          <button className={`${viewPauseBtn} pause bigBtn`} onClick={handlePauseClick}>PAUSE</button>
+          <button className={`${viewResetBtn} reset bigBtn`} onClick={() => handleResetClick(true)}>RESET</button>
         </div>
         <div className="motivational" onClick={catchNewQuote}>
           <p>{quote}</p>
diff --git a/src/done/Done.css b/src/done/Done.css
index 20ebaf5..9b6962a 100644
--- a/src/done/Done.css
+++ b/src/done/Done.css
@@ -1,3 +1,49 @@
-.Done {
-  color: white;
+.Done h2 {
+  text-align: right;
+}
+
+.Done .worked-hours .this {
+  width: 100%;
+  display: flex;
+  justify-content: space-evenly;
+}
+
+.Done .worked-hours .this .this-month,
+.Done .worked-hours .this .this-week,
+.Done .worked-hours .this .this-day {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+.Done .worked-hours .this .this-month span:last-of-type,
+.Done .worked-hours .this .this-week span:last-of-type,
+.Done .worked-hours .this .this-day span:last-of-type {
+  white-space: nowrap;
+  font-size: 0.8rem;
+}
+
+.Done .completed-tasks.sub-container ul li.dones {
+  color: gray;
+}
+
+.Done .completed-tasks.sub-container .modal {
+  display: flex;
+  flex-direction: column;
+  row-gap: 10px;
+}
+
+.Done .completed-tasks.sub-container .modal p {
+  color: red;
+}
+
+.Done .completed-tasks.sub-container .options {
+  display: flex;
+  justify-content: space-around;
+}
+
+.Done .completed-tasks.sub-container footer {
+  width: 100%;
+  display: flex;
+  column-gap: 12px;
 }
diff --git a/src/done/Done.jsx b/src/done/Done.jsx
index 2f431d7..680d6e0 100644
--- a/src/done/Done.jsx
+++ b/src/done/Done.jsx
@@ -1,9 +1,51 @@
+import { useState, useEffect } from 'react'
+import { Store } from '../store/store'
 import './Done.css'
 
 export const Done = () => {
+  const store = Store()
+  const [input, setInput] = useState("")
+  const [showModal, setShowModal] = useState("hide")
+  const [showFooter, setShowFooter] = useState("")
+  const handleInputEnterKey = k => k.key === "Enter" && input.trim() != "" && (store.tasks.add(input), setInput(""))
+  useEffect(() => localStorage.setItem("Completed Tasks", JSON.stringify(store.tasks.completed)), [store.tasks.completed])
+  useEffect(() => localStorage.setItem("Worked Hours History", JSON.stringify(store.tasks.workedHoursHistory)), [store.tasks.workedHoursHistory])
+
   return (
     <div className='Done'>
       <h1>Done</h1>
+      <div className="worked-hours sub-container">
+        <h2>Worked Hours</h2>
+        <div className="this">
+          <div className="this-month"><span className='counter-stats'>{store.tasks.workedHours().month}</span><span>Last Month</span></div>
+          <div className="this-week"><span className='counter-stats'>{store.tasks.workedHours().week}</span><span>Last Week</span></div>
+          <div className="this-day"><span className='counter-stats'>{store.tasks.workedHours().day}</span><span>Today</span></div>
+        </div>
+      </div>
+      <div className="completed-tasks sub-container">
+        <h2>Completed Tasks</h2>
+        <ul className='ul'>
+          {store.tasks.completed.map(item => (<li key={item.id} className='li dones'>{item.content}</li>))}
+        </ul>
+        <div className={`${showModal} modal`}>
+          <p>Deleting all completed tasks will log today&apos;s work and start a new day. Are you sure?</p>
+          <div className="options">
+            <button className='midBtn' onClick={() => (setShowModal("hide"), setShowFooter(""))}>Cancel</button>
+            <button className='midBtn' onClick={() => (store.tasks.deleteCompleted(), setShowModal("hide"), setShowFooter(""))}>Yes, I want to start a new day</button>
+          </div>
+        </div>
+        <footer className={showFooter}>
+          <button className={`${store.tasks.completed.length === 0 ? 'hide' : 'midBtn'}`} onClick={() => (setShowFooter("hide"), setShowModal(""))}>Delete All</button>
+          <input
+            type="text"
+            className='input'
+            value={input}
+            placeholder='Type a completed task and press Enter'
+            onChange={e => setInput(e.target.value)}
+            onKeyDown={k => handleInputEnterKey(k)}
+          />
+        </footer>
+      </div>
     </div>
   )
 }
\ No newline at end of file
diff --git a/src/store/store.js b/src/store/store.js
index d8308fd..ec9eebc 100644
--- a/src/store/store.js
+++ b/src/store/store.js
@@ -1,42 +1,52 @@
 import { create } from "zustand"
 import { devtools } from "zustand/middleware"
 import { add, completed, markAsDone, markAsTodo, deleteDones } from "./todo_logic.js"
+import { addCompletedTask, deleteAllCompletedTasks, workedHours } from './tasks_logic.js'
 
 const todoDailySlice = (set, get) => ({
   title: "Daily Goals",
-  completed: () => completed(get, "daily"),
   todos: JSON.parse(localStorage.getItem("Daily Goals Todos")) || [],
   dones: JSON.parse(localStorage.getItem("Daily Goals Dones")) || [],
-  add: (input) => add(set, input, "daily"),
-  markAsDone: (item) => markAsDone(set, item, "daily"),
-  markAsTodo: (item) => markAsTodo(set, item, "daily"),
+  completed: () => completed(get, "daily"),
+  add: input => add(set, input, "daily"),
+  markAsDone: item => markAsDone(set, item, "daily"),
+  markAsTodo: item => markAsTodo(set, item, "daily"),
   deleteDones: () => deleteDones(set, "daily")
 })
 
 const todoWeeklySlice = (set, get) => ({
   title: "Weekly Goals",
-  completed: () => completed(get, "weekly"),
   todos: JSON.parse(localStorage.getItem("Weekly Goals Todos")) || [],
   dones: JSON.parse(localStorage.getItem("Weekly Goals Dones")) || [],
-  add: (input) => add(set, input, "weekly"),
-  markAsDone: (item) => markAsDone(set, item, "weekly"),
-  markAsTodo: (item) => markAsTodo(set, item, "weekly"),
+  completed: () => completed(get, "weekly"),
+  add: input => add(set, input, "weekly"),
+  markAsDone: item => markAsDone(set, item, "weekly"),
+  markAsTodo: item => markAsTodo(set, item, "weekly"),
   deleteDones: () => deleteDones(set, "weekly")
 })
 
 const todoMonthlySlice = (set, get) => ({
   title: "Monthly Goals",
-  completed: () => completed(get, "monthly"),
   todos: JSON.parse(localStorage.getItem("Monthly Goals Todos")) || [],
   dones: JSON.parse(localStorage.getItem("Monthly Goals Dones")) || [],
-  add: (input) => add(set, input, "monthly"),
-  markAsDone: (item) => markAsDone(set, item, "monthly"),
-  markAsTodo: (item) => markAsTodo(set, item, "monthly"),
+  completed: () => completed(get, "monthly"),
+  add: input => add(set, input, "monthly"),
+  markAsDone: item => markAsDone(set, item, "monthly"),
+  markAsTodo: item => markAsTodo(set, item, "monthly"),
   deleteDones: () => deleteDones(set, "monthly")
 })
 
+const tasksSlice = (set, get) => ({
+  completed: JSON.parse(localStorage.getItem("Completed Tasks")) || [],
+  workedHoursHistory: JSON.parse(localStorage.getItem("Worked Hours History")) || [],
+  add: input => addCompletedTask(set, input),
+  deleteCompleted: () => deleteAllCompletedTasks(set, get),
+  workedHours: () => workedHours(get),
+})
+
 export const Store = create(devtools((set, get) => ({
   daily: todoDailySlice(set, get),
   weekly: todoWeeklySlice(set, get),
-  monthly: todoMonthlySlice(set, get)
+  monthly: todoMonthlySlice(set, get),
+  tasks: tasksSlice(set, get)
 })))
\ No newline at end of file
diff --git a/src/store/tasks_logic.js b/src/store/tasks_logic.js
new file mode 100644
index 0000000..80a89d7
--- /dev/null
+++ b/src/store/tasks_logic.js
@@ -0,0 +1,25 @@
+export const addCompletedTask = (set, input) => set(state => ({
+  tasks: {
+    ...state.tasks,
+    completed: [...state.tasks.completed, { id: Date.now(), content: input }]
+  }
+}), false, 'tasks/add')
+
+export const deleteAllCompletedTasks = (set, get) => set(state => {
+  const workedHoursHistoryArray = [get().tasks.completed.length * 15 / 60, ...state.tasks.workedHoursHistory]
+  workedHoursHistoryArray.length > 30 && workedHoursHistoryArray.pop()
+  return ({
+    tasks: {
+      ...state.tasks,
+      workedHoursHistory: workedHoursHistoryArray,
+      completed: []
+    }
+  })
+}, false, 'tasks/deleteAllCompleted')
+
+export const workedHours = get => {
+  const day = get().tasks.completed.length * 15 / 60
+  const week = get().tasks.workedHoursHistory.slice(0, 7).reduce((a, b) => a + b, 0)
+  const month = get().tasks.workedHoursHistory.reduce((a, b) => a + b, 0)
+  return ({ "day": day, "week": week, "month": month })
+}
diff --git a/src/todo/Todo.css b/src/todo/Todo.css
index 72ae026..d3effc6 100644
--- a/src/todo/Todo.css
+++ b/src/todo/Todo.css
@@ -1,37 +1,15 @@
-.Todo {
-  width: 100%;
-  border: 1px solid red;
-  border-radius: 10px;
-  padding: 10px;
-  display: flex;
-  flex-direction: column;
-  row-gap: 12px;
-}
-
 .Todo header {
   display: flex;
   justify-content: space-between;
   align-items: center;
 }
 
-.Todo header span span {
-  font-size: 24px;
-  font-weight: 700;
-}
-
 .Todo header h1 {
   font-size: 22px;
 }
 
-.Todo ul {
-  width: 95%;
-  align-self: flex-end;
-  font-size: 12px;
-}
-
 .Todo ul li {
   cursor: pointer;
-  padding: 5px 0;
 }
 
 .Todo ul .dones {
@@ -42,19 +20,3 @@
   display: flex;
   column-gap: 12px;
 }
-
-.Todo footer button {
-  width: fit-content;
-  font-size: 14px;
-  white-space: nowrap;
-}
-
-.Todo footer input {
-  width: 100%;
-  padding: 5px;
-  border: 1px solid red;
-  border-radius: 5px;
-  outline: none;
-  color: white;
-  background-color: black;
-}
diff --git a/src/todo/Todo.jsx b/src/todo/Todo.jsx
index b43e521..a57f0da 100644
--- a/src/todo/Todo.jsx
+++ b/src/todo/Todo.jsx
@@ -12,23 +12,24 @@ export const Todo = ({ store }) => {
   }, [store.todos, store.dones, store.title])
 
   return (
-    <div className='Todo'>
+    <div className='Todo sub-container'>
       <header>
-        <div><span className={store.completed() === "NaN%" ? 'hide' : ''}>Completed: <span>{store.completed()}</span></span></div>
+        <div><span className={store.completed() === "NaN%" ? 'hide' : ''}>Completed: <span className='counter-stats'>{store.completed()}</span></span></div>
         <h1>{store.title}</h1>
       </header>
-      <ul>
-        {store.todos.map(item => (<li key={item.id} onClick={() => store.markAsDone(item)}>{item.content}</li>))}
-        {store.dones.map(item => (<li key={item.id} className='dones' onClick={() => store.markAsTodo(item)}>{item.content}</li>))}
+      <ul className='ul'>
+        {store.todos.map(item => (<li key={item.id} className='li' onClick={() => store.markAsDone(item)}>{item.content}</li>))}
+        {store.dones.map(item => (<li key={item.id} className='li dones' onClick={() => store.markAsTodo(item)}>{item.content}</li>))}
       </ul>
       <footer>
-        <button onClick={() => store.deleteDones()} className={`${store.dones.length === 0 ? 'hide' : ''}`}>Delete All Completed</button>
+        <button className={`${store.dones.length === 0 ? 'hide' : 'midBtn'}`} onClick={() => store.deleteDones()} >Delete All Completed</button>
         <input
           type="text"
+          className='input'
           value={input}
           placeholder="Type a goal and press Enter"
-          onChange={(e) => setInput(e.target.value)}
-          onKeyDown={(k) => handleInputEnterKey(k)}
+          onChange={e => setInput(e.target.value)}
+          onKeyDown={k => handleInputEnterKey(k)}
         />
       </footer>
     </div>
diff --git a/src/todo/Todos.css b/src/todo/Todos.css
deleted file mode 100644
index 3a232b3..0000000
--- a/src/todo/Todos.css
+++ /dev/null
@@ -1,5 +0,0 @@
-.Todos {
-  display: flex;
-  row-gap: 1%;
-  overflow-y: auto;
-}
diff --git a/src/todo/Todos.jsx b/src/todo/Todos.jsx
index 4527f46..8419032 100644
--- a/src/todo/Todos.jsx
+++ b/src/todo/Todos.jsx
@@ -1,6 +1,5 @@
 import { Store } from '../store/store.js'
 import { Todo } from './Todo.jsx'
-import './Todos.css'
 
 export const Todos = () => {
   const store = Store()