style.css

body,
div,
ul,
li,
h1 {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
li {
  list-style: none;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.shopping_app {
  display: flex;
  flex-direction: column;
  width: 400px;
  height: 600px;
  background-color: #f0e6e7;
  border-radius: 15px;
  box-shadow: 7px 7px 10px rgba(0, 0, 0, 0.2);
}

h1 {
  width: 100%;
  height: 60px;
  background-color: #ff6958;
  color: #fff;
  text-align: center;
  font-size: 20px;
  line-height: 60px;
  border-radius: 10px 10px 0 0;
}

.shpping-list {
  padding: 15px;
  overflow-y: scroll;
  height: 420px;
}
.shpping-list {
  -ms-overflow-style: none; /* IE and Edge */
  scrollbar-width: none; /* Firefox */
}
.shpping-list::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera*/
}
.shpping-list li {
  position: relative;
  width: 100%;
  padding: 15px;
  margin-bottom: 10px;
  background-color: #fff;
  border-radius: 5px;
}
.shpping-list li button {
  position: absolute;
  top: 50%;
  right: 15px;
  width: 35px;
  height: 35px;
  background-color: #ff6958;
  border: 0 none;
  border-radius: 50px;
  transform: translateY(-50%);
  cursor: pointer;
}

.shpping-list li button i {
  font-size: 16px;
  color: #fff;
  transition: all 200ms ease-out;
}
.shpping-list li button:hover i {
  transform: scale(1.2);
}

.form {
  height: 120px;
  background-color: #ff6958;
  border-radius: 0 0 10px 10px;
}

.form input[type='text'] {
  margin: 10px auto 0;
  display: block;
  padding: 0 10px;
  width: 90%;
  height: 35px;
  border: 0 none;
  outline: 0 none;
  font-size: 18px;
}

.btn-submit {
  display: block;
  margin: 5px auto;
  width: 50px;
  height: 50px;
  border: 0 none;
  border-radius: 50px;
  background-color: #f0e6e7;
  cursor: pointer;
}

.btn-submit i {
  font-size: 25px;
  color: #ff6958;
  transition: all 200ms ease-out;
}

.btn-submit:hover i {
  transform: scale(1.2);
}