style.css

* {
  margin: 0%;
  padding: 0%;
}

body {
  height: 100vh;
  width: 100%;
  background: linear-gradient(to bottom, #acf360 0%, #22ddf5 100%);
}

/*Others are to right/left/top*/

.container .todoList {

  overflow-y: hidden;
}

.container {
  margin: 120px auto;
  max-width: 400px;
  width: 100%;
  background-color:
    rgb(255, 255, 255);
  border-radius: 5px;
  padding: 25px;
}

.container .header {
  font-size: 30px;
  font-weight: 500;
  text-align: center;
}

.container .inputbox {
  display: flex;
  height: 45px;
  width: 100%;
  margin: 20px 0;
}

.inputbox input {
  width: 85%;
  height: 100%;
  border: 1px solid #ccc;
  font-size: 17px;
  border-radius: 3px;
  padding-left: 15px;
}

.inputbox button {
  margin-left: 5px;
  width: 60px;
  height: 100%;
  outline: none;
  border: none;
  font-size: 20px;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  cursor: pointer;
  color: white;
  opacity: 0.6;
  pointer-events: auto;
}

.inputbox button.active {
  opacity: 1;
  pointer-events: auto;
}

.inputbox:hover button {
  background-color: rgb(152, 69, 180);
}

/*
button{
  transition-property:background-color;
  transition-duration: 200ms;
  transition-timing-function: ease-in-out;
  transition-delay: 0.07s;
}*/

.container .todoList {
  max-height: 250px;
  overflow-y: auto;
  /*To align items in a list with a specified height*/
}

.todoList li {
  list-style-type: none;
  height: 45px;
  line-height: 40px;
  margin-left: 5px;
  margin-bottom: 8px;
  position: relative;
  background-color: rgb(234, 237, 241);
  padding: 0 15px;
  cursor: default;
  overflow: hidden;
  /*used in outer element*/
}

.todoList li span {
  position: absolute;
  right: -55px;
  text-align: center;
  color: white;
  background: rgb(234, 55, 55);
  width: 50px;
  height: 45px;
  border-radius: 0 3px 3px 0;
  cursor: pointer;
  transition-duration: 0.2s;
  transition-timing-function: ease-in-out;
}

.todoList li:hover span {
  right: 0px;
}

.container .footer {
  display: flex;
  width: 100%;
  margin-top: 20px;
  align-items: center;
  justify-content: space-between;
}

.footer button {
  height: 30px;
  width: 70px;
  border: none;
  color: white;
  background-color: rgb(152, 69, 180);
  padding: 2px 4px;
  border-radius: 3px;
  cursor: pointer;
  outline: none;
  font-size: 16px;
}