App.css

/* Basic Style */

body {
  background: #fff;
  color: #333;
  font-family: Lato, sans-serif;
  background-color: #e4e4e4;
}

.container {
  display: block;
  width: 400px;
  margin: 10px auto 100px;
  background-color: #fff;
  padding: 0px 10px 10px 10px;
  border-radius: 10px;
}

h2 {
  text-align: center;
  padding-top: 10px;
  margin-bottom: 0px;
}

ul {
  margin: 0;
  padding: 0;
}

li * {
  float: left;
}

li,
h3 {
  clear: both;
  list-style: none;
}

input,
button {
  outline: none;
}

button {
  background: none;
  border: 0px;
  color: #888;
  font-size: 15px;
  width: 60px;
  margin: 10px 0 0;
  font-family: Lato, sans-serif;
  cursor: pointer;
}

button:hover {
  color: #333;
}

/* Heading */

h3,
label[for="new-task"] {
  color: #333;
  font-weight: 700;
  font-size: 15px;
  border-bottom: 2px solid #333;
  padding: 20px 0 10px;
  margin: 0;
  text-transform: uppercase;
}

input[type="text"] {
  margin: 0;
  font-size: 18px;
  line-height: 18px;
  height: 18px;
  padding: 10px;
  border: 1px solid #ddd;
  background: #fff;
  border-radius: 6px;
  font-family: Lato, sans-serif;
  color: #888;
}

input[type="text"]:focus {
  color: #333;
}

/* New Task */

label[for="new-task"] {
  display: block;
  margin: 0 0 20px;
}

input#new-task {
  float: left;
  width: 318px;
}

p > button:hover {
  color: #0fc57c;
}

/* Task list */

li {
  overflow: hidden;
  padding: 20px 0;
  border-bottom: 1px solid #eee;
}

li > input[type="checkbox"] {
  margin: 0 10px;
  position: relative;
  top: 15px;
}

li > label {
  font-size: 18px;
  line-height: 40px;
  width: 237px;
  padding: 0 0 0 11px;
}

li > input[type="text"] {
  width: 226px;
}

li > .delete:hover {
  color: #cf2323;
}

/* Completed */

#completed-tasks label {
  text-decoration: line-through;
  color: #888;
}

/* Edit Task */

ul li input[type="text"] {
  display: none;
}

ul li.editMode input[type="text"] {
  display: block;
}

ul li.editMode label {
  display: none;
}