diff --git a/app.js b/app.js
index ab737a60027..31554e9c8c3 100644
--- a/app.js
+++ b/app.js
@@ -8,139 +8,144 @@
 
 // Event handling, user interaction is what starts the code execution.
 
-var taskInput=document.getElementById("new-task");//Add a new task.
-var addButton=document.getElementsByTagName("button")[0];//first button
-var incompleteTaskHolder=document.getElementById("incompleteTasks");//ul of #incompleteTasks
-var completedTasksHolder=document.getElementById("completed-tasks");//completed-tasks
+const taskInput=document.getElementById("new-task");//Add a new task.
+const addButton=document.getElementsByTagName("button")[0];//first button
+const incompleteTaskHolder=document.getElementById("incomplete-tasks");//ul of #incomplete-tasks
+const completedTasksHolder=document.getElementById("completed-tasks");//completed-tasks
 
 
 //New task list item
-var createNewTaskElement=function(taskString){
-
-    var listItem=document.createElement("li");
-
-    //input (checkbox)
-    var checkBox=document.createElement("input");//checkbx
-    //label
-    var label=document.createElement("label");//label
-    //input (text)
-    var editInput=document.createElement("input");//text
-    //button.edit
-    var editButton=document.createElement("button");//edit button
-
-    //button.delete
-    var deleteButton=document.createElement("button");//delete button
-    var deleteButtonImg=document.createElement("img");//delete button image
-
-    label.innerText=taskString;
-    label.className='task';
-
-    //Each elements, needs appending
-    checkBox.type="checkbox";
-    editInput.type="text";
-    editInput.className="task";
-
-    editButton.innerText="Edit"; //innerText encodes special characters, HTML does not.
-    editButton.className="edit";
-
-    deleteButton.className="delete";
-    deleteButtonImg.src='./remove.svg';
-    deleteButton.appendChild(deleteButtonImg);
-
-
-    //and appending.
-    listItem.appendChild(checkBox);
-    listItem.appendChild(label);
-    listItem.appendChild(editInput);
-    listItem.appendChild(editButton);
-    listItem.appendChild(deleteButton);
-    return listItem;
+const createNewTaskElement=function(taskString){
+
+  const listItem=document.createElement("li");
+
+  //input (checkbox)
+  const checkBox=document.createElement("input");//checkbx
+  //label
+  const label=document.createElement("label");//label
+  //input (text)
+  const editInput=document.createElement("input");//text
+  //button.edit
+  const editButton=document.createElement("button");//edit button
+
+  //button.delete
+  const deleteButton=document.createElement("button");//delete button
+  const deleteButtonImg=document.createElement("img");//delete button image
+
+  listItem.className="list__item";
+
+  label.innerText=taskString;
+  label.className="list__label label label_text";
+
+  //Each elements, needs appending
+  checkBox.type="checkbox";
+  checkBox.className="list__input input input_checkbox";
+  editInput.type="text";
+  editInput.className="list__input input input_text";
+
+  editButton.innerText="Edit"; //innerText encodes special characters, HTML does not.
+  editButton.className="list__button button button_edit";
+
+  deleteButton.className="list__button button button_remove";
+  deleteButtonImg.className="button__icon icon";
+  deleteButtonImg.alt="remove";
+  deleteButtonImg.src="./remove.svg";
+  deleteButton.appendChild(deleteButtonImg);
+
+
+  //and appending.
+  listItem.appendChild(checkBox);
+  listItem.appendChild(label);
+  listItem.appendChild(editInput);
+  listItem.appendChild(editButton);
+  listItem.appendChild(deleteButton);
+  return listItem;
 }
 
 
 
-var addTask=function(){
-    console.log("Add Task...");
-    //Create a new list item with the text from the #new-task:
-    if (!taskInput.value) return;
-    var listItem=createNewTaskElement(taskInput.value);
+const addTask=function(){
+  console.log("Add Task...");
+  //Create a new list item with the text from the #new-task:
+  if (!taskInput.value) return;
+  const listItem=createNewTaskElement(taskInput.value);
 
-    //Append listItem to incompleteTaskHolder
-    incompleteTaskHolder.appendChild(listItem);
-    bindTaskEvents(listItem, taskCompleted);
+  //Append listItem to incompleteTaskHolder
+  incompleteTaskHolder.appendChild(listItem);
+  bindTaskEvents(listItem, taskCompleted);
 
-    taskInput.value="";
+  taskInput.value="";
 
 }
 
 //Edit an existing task.
 
-var editTask=function(){
-    console.log("Edit Task...");
-    console.log("Change 'edit' to 'save'");
+const editTask=function(){
+  console.log("Edit Task...");
+  console.log("Change 'edit' to 'save'");
 
 
-    var listItem=this.parentNode;
+  const listItem=this.parentNode;
 
-    var editInput=listItem.querySelector('input[type=text]');
-    var label=listItem.querySelector("label");
-    var editBtn=listItem.querySelector(".edit");
-    var containsClass=listItem.classList.contains("editMode");
-    //If class of the parent is .editmode
-    if(containsClass){
+  const editInput=listItem.querySelector(".input_text");
+  const label=listItem.querySelector(".label_text");
+  const editBtn=listItem.querySelector(".button_edit");
+  const containsClass=listItem.classList.contains("list__item_edit");
+  //If class of the parent is .edit-mode
+  if(containsClass){
 
-        //switch to .editmode
-        //label becomes the inputs value.
-        label.innerText=editInput.value;
-        editBtn.innerText="Edit";
-    }else{
-        editInput.value=label.innerText;
-        editBtn.innerText="Save";
-    }
+    //switch to .edit-mode
+    //label becomes the inputs value.
+    label.innerText=editInput.value;
+    editBtn.innerText="Edit";
+  }else{
+    editInput.value=label.innerText;
+    editBtn.innerText="Save";
+  }
 
-    //toggle .editmode on the parent.
-    listItem.classList.toggle("editMode");
+  //toggle .edit-mode on the parent.
+  listItem.classList.toggle("list__item_edit");
 };
 
 
 //Delete task.
-var deleteTask=function(){
-    console.log("Delete Task...");
+const deleteTask=function(){
+  console.log("Delete Task...");
 
-    var listItem=this.parentNode;
-    var ul=listItem.parentNode;
-    //Remove the parent list item from the ul.
-    ul.removeChild(listItem);
+  const listItem=this.parentNode;
+  const ul=listItem.parentNode;
+  //Remove the parent list item from the ul.
+  ul.removeChild(listItem);
 
 }
 
 
 //Mark task completed
-var taskCompleted=function(){
-    console.log("Complete Task...");
+const taskCompleted=function(){
+  console.log("Complete Task...");
 
-    //Append the task list item to the #completed-tasks
-    var listItem=this.parentNode;
-    completedTasksHolder.appendChild(listItem);
-    bindTaskEvents(listItem, taskIncomplete);
+  //Append the task list item to the #completed-tasks
+  const listItem=this.parentNode;
+  completedTasksHolder.appendChild(listItem);
+  bindTaskEvents(listItem, taskIncomplete);
 
 }
 
 
-var taskIncomplete=function(){
-    console.log("Incomplete Task...");
-//Mark task as incomplete.
-    //When the checkbox is unchecked
-    //Append the task list item to the #incompleteTasks.
-    var listItem=this.parentNode;
-    incompleteTaskHolder.appendChild(listItem);
-    bindTaskEvents(listItem,taskCompleted);
+const taskIncomplete=function(){
+  console.log("Incomplete Task...");
+  //Mark task as incomplete.
+  //When the checkbox is unchecked
+  //Append the task list item to the #incomplete-tasks.
+  const listItem=this.parentNode;
+  incompleteTaskHolder.appendChild(listItem);
+  bindTaskEvents(listItem,taskCompleted);
 }
 
 
 
-var ajaxRequest=function(){
-    console.log("AJAX Request");
+const ajaxRequest=function(){
+  console.log("AJAX Request");
 }
 
 //The glue to hold it all together.
@@ -152,37 +157,37 @@ addButton.addEventListener("click",addTask);
 addButton.addEventListener("click",ajaxRequest);
 
 
-var bindTaskEvents=function(taskListItem,checkBoxEventHandler){
-    console.log("bind list item events");
-//select ListItems children
-    var checkBox=taskListItem.querySelector("input[type=checkbox]");
-    var editButton=taskListItem.querySelector("button.edit");
-    var deleteButton=taskListItem.querySelector("button.delete");
+const bindTaskEvents=function(taskListItem,checkBoxEventHandler){
+  console.log("bind list item events");
+  //select ListItems children
+  const checkBox=taskListItem.querySelector(".input_checkbox");
+  const editButton=taskListItem.querySelector(".button.button_edit");
+  const deleteButton=taskListItem.querySelector(".button.button_remove");
 
 
-    //Bind editTask to edit button.
-    editButton.onclick=editTask;
-    //Bind deleteTask to delete button.
-    deleteButton.onclick=deleteTask;
-    //Bind taskCompleted to checkBoxEventHandler.
-    checkBox.onchange=checkBoxEventHandler;
+  //Bind editTask to edit button.
+  editButton.onclick=editTask;
+  //Bind deleteTask to delete button.
+  deleteButton.onclick=deleteTask;
+  //Bind taskCompleted to checkBoxEventHandler.
+  checkBox.onchange=checkBoxEventHandler;
 }
 
 //cycle over incompleteTaskHolder ul list items
 //for each list item
-for (var i=0; i<incompleteTaskHolder.children.length;i++){
+for (let i=0; i<incompleteTaskHolder.children.length;i++){
 
-    //bind events to list items chldren(tasksCompleted)
-    bindTaskEvents(incompleteTaskHolder.children[i],taskCompleted);
+  //bind events to list items chldren(tasksCompleted)
+  bindTaskEvents(incompleteTaskHolder.children[i],taskCompleted);
 }
 
 
 
 
 //cycle over completedTasksHolder ul list items
-for (var i=0; i<completedTasksHolder.children.length;i++){
-    //bind events to list items chldren(tasksIncompleted)
-    bindTaskEvents(completedTasksHolder.children[i],taskIncomplete);
+for (let i=0; i<completedTasksHolder.children.length;i++){
+  //bind events to list items chldren(tasksIncompleted)
+  bindTaskEvents(completedTasksHolder.children[i],taskIncomplete);
 }
 
 
diff --git a/index.html b/index.html
index ef4aa1f60ca..db6d3bed534 100644
--- a/index.html
+++ b/index.html
@@ -1,19 +1,61 @@
-<html>
-<HEAD><title>Todo App</title>
-<link href='https://fonts.googleapis.com/css?family=Lato:300,400,700' rel='stylesheet' type='text/css'>
-<link rel="stylesheet" href="style.css" type="text/css" MEDIA="screen" charset="utf-8">
-</HEAD>
-<body>
-<div class="aaa"><img src="./eisenhower-matrix.jpg"><a class='more_inf' href="https://goal-life.com/page/method/matrix-eisenhower">Want more details&quest;</a></div>
-<div class="centered-main-page-element"><p id='topSectionForAddingElementToList'><label for="new-task">Add Item</label><div class="task-row-wrapper"><input id='new-task'class="task" type="text"><button>Add</button></div>
-</p><h3>Todo</h3>
-<ul id='incompleteTasks'>
-<li><input type='checkbox'><label class="task">Pay Bills</label><input type="text" class="task"><button class="edit">Edit</button><button class="delete"><img src="./remove.svg"></button></li>
-<li class="editMode"><input type="checkbox"><label class="task">Go Shopping</label><input type="text" value="Go Shopping" class="task"><button class='edit'>Save</button><button class="delete"><img src="./remove.svg"></button></li>
-</ul><h3>Completed</h3><ul id="completed-tasks"><li><input type="checkbox" checked><label class="task">See the Doctor</label><input type="text" class="task"><button class="edit">Edit</button><button class="delete"><img src="./remove.svg"></button>
-</li>
-</ul>
-</div>
-<script type="text/javascript" SRC="app.js"></script>
-</body>
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title>Todo App</title>
+    <link href="https://fonts.googleapis.com/css?family=Lato:300,400,700" rel="stylesheet">
+    <link rel="stylesheet" href="style.css" media="screen">
+  </head>
+  <body class="body">
+    <header class="header">
+      <img class="header__img" alt="eisenhower matrix" src="./eisenhower-matrix.jpg">
+      <a class="header__info" href="https://goal-life.com/page/method/matrix-eisenhower">Want more details?</a>
+    </header>
+    <main class="main">
+      <section class="section section_add">
+        <h2 class="section__title title title_add">Add Item</h2>
+        <div class="section__container">
+          <input id="new-task" class="section__input input input_text input_add" type="text">
+          <button class="section__button button">Add</button>
+        </div>
+      </section>
+      <section class="section section_todo">
+        <h1 class="section__title title">Todo</h1>
+        <ul id="incomplete-tasks" class="section__list list list_todo">
+          <li class="list__item">
+            <input type="checkbox" class="list__input input input_checkbox">
+            <label class="list__label label label_text">Pay Bills</label>
+            <input type="text" class="list__input input input_text">
+            <button class="list__button button button_edit">Edit</button>
+            <button class="list__button button button_remove">
+              <img class="button__icon icon" alt="remove" src="./remove.svg">
+            </button>
+          </li>
+          <li class="list__item list__item_edit">
+            <input type="checkbox" class="list__input input input_checkbox">
+            <label class="list__label label label_text">Go Shopping</label>
+            <input type="text" value="Go Shopping" class="list__input input input_text">
+            <button class="list__button button button_edit">Save</button>
+            <button class="list__button button button_remove">
+              <img class="button__icon icon" alt="remove" src="./remove.svg">
+            </button>
+          </li>
+        </ul>
+      </section>
+      <section class="section section_done">
+        <h2 class="section__title title">Completed</h2>
+        <ul id="completed-tasks" class="section__list list list_done">
+          <li class="list__item">
+            <input type="checkbox" class="list__input input input_checkbox" checked>
+            <label class="list__label label label_text">See the Doctor</label>
+            <input type="text" class="list__input input input_text">
+            <button class="list__button button button_edit">Edit</button>
+            <button class="list__button button button_remove">
+              <img class="button__icon icon" alt="remove" src="./remove.svg">
+            </button>
+          </li>
+        </ul>
+      </section>
+    </main>
+    <script src="app.js"></script>
+  </body>
 </html>
\ No newline at end of file
diff --git a/remove.svg b/remove.svg
index 4a527ef5a8e..6804259602a 100644
--- a/remove.svg
+++ b/remove.svg
@@ -13,34 +13,4 @@
 			c-4.8-4.8-12.5-4.8-17.3,0s-4.8,12.5,0,17.3l47.8,47.8l-47.8,47.8C220.725,297.263,220.725,304.962,225.425,309.763z"/>
 	</g>
 </g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
-<g>
-</g>
 </svg>
diff --git a/style.css b/style.css
index ab36227705e..9bdd05673ad 100644
--- a/style.css
+++ b/style.css
@@ -1,148 +1,170 @@
+@import url("https://fonts.cdnfonts.com/css/papyrus");
+
 /* Basic Style */
-body {
-    background-color: #f8f8f8;
-    color: #333;
-    font-family: Lato, sans-serif;
-}
-.aaa {
-    width: 500px;
-    margin: 0 auto;
-    display: block;
-    text-align: right;
+
+.body {
+  background-color: #f8f8f8;
+  color: #333;
+  font-family: Lato, sans-serif;
 }
-.aaa img {
-    width: 100%;
+
+.header {
+  width: 500px;
+  margin: 0 auto;
+  display: block;
+  text-align: right;
 }
-.aaa .more_inf {
-    font-family: fantasy, cursive;
+
+.header__img {
+  width: 100%;
 }
 
-@media (max-width:768px) {
-.aaa { text-align: center;
+.header__info {
+  font-family: Papyrus, sans-serif;
+  font-weight: 700;
+  font-size: 17px;
+  letter-spacing: 1.95px;
 }
+
+@media (max-width: 768px) {
+
+  .header {
+    text-align: center;
+  }
+
 }
-.centered-main-page-element {
-    display: block;
-    width: 500px;
-    margin: 0 auto 0;
+
+.main {
+  display: block;
+  width: 500px;
+  margin: 0 auto 0;
 }
-.task {
-    width: 56%;
-    display: inline-block;
-    flex-grow: 1
+
+.input_text,
+.label {
+  width: 56%;
+  display: inline-block;
+  flex-grow: 1;
 }
-.task-row-wrapper {
-    display: flex;
+
+.section__container {
+  display: flex;
 }
-ul {
-    margin:0;
-    padding: 0px;
+
+.list {
+  margin: 0;
+  padding: 0px;
 }
-li, h3 {
-    list-style:none;
+
+.list__item {
+  list-style: none;
+  overflow: hidden;
+  padding: 20px 0;
+  border-bottom: 1px solid #eee;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
 }
-input,button{
-    outline:none;
+
+.input,
+.button {
+  outline: none;
 }
-button {
-    background: none;
-    border: 0px;
-    color: #888;
-    font-size: 15px;
-    width: 60px;
-    font-family: Lato, sans-serif;
-    cursor: pointer;
+
+.button {
+  background: none;
+  border: 0px;
+  color: #888;
+  font-size: 15px;
+  width: 60px;
+  font-family: Lato, sans-serif;
+  cursor: pointer;
 }
-button:hover {
-    color: #3a3A3a;
+
+.button:hover {
+  color: #3a3a3a;
 }
+
 /* Heading */
-h3,
-label[for='new-task'] {
-    color: #333;
-    font-weight: 700;
-    font-size: 15px;
-    border-bottom: 2px solid #333;
-    padding: 30px 0 10px;
-    margin: 0;
-    text-transform: uppercase;
-}
-input[type="text"] {
-    margin: 0;
-    font-size: 18px;
-    line-height: 18px;
-    height: 21px;
-    padding: 0 9px;
-    border: 1px solid #dDd;
-    background: #FFF;
-    border-radius: 6px;
-    font-family: Lato, sans-serif;
-    color: #888;
-}
-input[type="text"]:focus {
-    color: #333;
+
+.section__title {
+  color: #333;
+  font-weight: 700;
+  font-size: 15px;
+  border-bottom: 2px solid #333;
+  padding: 30px 0 10px;
+  margin: 0;
+  text-transform: uppercase;
 }
 
-/* New Task */
-label[for='new-task'] {
-    display: block;
-    margin: 0 0 20px;
+.input_text {
+  margin: 0;
+  font-size: 18px;
+  line-height: 18px;
+  height: 21px;
+  padding: 0 9px;
+  border: 1px solid #ddd;
+  background: #fff;
+  border-radius: 6px;
+  font-family: Lato, sans-serif;
+  color: #888;
+  width: 226px;
+  display: none;
 }
-input#new-task {
-    width: 318px;
+
+.input_text:focus {
+  color: #333;
 }
 
-/* Task list */
-li {
-    overflow: hidden;
-    padding: 20px 0;
-    border-bottom: 1px solid #eee;
+/* New Task */
 
-    display: flex;
-    justify-content: space-between;
-    align-items: center;
-}
-li > * {
-    vertical-align: middle;
+.title_add {
+  display: block;
+  margin: 0 0 20px;
 }
 
-li > input[type="checkbox"] {
-    margin: 0 10px;
+.input_add {
+  width: 318px;
+  display: inline-block;
 }
-li > label {
-    padding-left: 10px;
-    box-sizing: border-box;
-    font-size: 18px;
-    width: 226px;
+
+/* Task list */
+
+.input_checkbox {
+  margin: 0 10px;
 }
-li >    input[type="text"] {
-    width: 226px
+
+.label_text {
+  padding-left: 10px;
+  box-sizing: border-box;
+  font-size: 18px;
+  width: 226px;
 }
-button.delete img {
-    height: 2em;
-    transform: rotateZ(45deg);
-    transition: transform 200ms ease-in;
+
+.button__icon {
+  height: 2em;
+  transform: rotateZ(45deg);
+  transition: transform 200ms ease-in;
 }
-button.delete img:hover {
-    transform: rotateZ(0);
+
+.button__icon:hover {
+  transform: rotateZ(0);
 }
 
 /* Completed */
-ul#completed-tasks label {
-    text-decoration: line-through
-    color: #888;
+
+.list_done .label_text {
+  text-decoration: line-through;
+  color: #888;
 }
 
 /* Edit Task */
-ul li input[type=text] {
-    display:none
-}
 
-ul li.editMode input[type=text] {
-    display:inline-block;
-    width:224px
+.list__item_edit .input_text {
+  display: inline-block;
+  width: 224px;
 }
 
-ul li.editMode label {
-    display:none;
+.list__item_edit .label_text {
+  display: none;
 }
\ No newline at end of file