amazon-clone/src/Subtotal.css

.subtotal {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 300px;
  height: 100px;
  padding: 20px;
  /*background-color: #f3f3f3;*/
  background: linear-gradient(
    to bottom right,
    rgb(235, 195, 217),
    rgb(188, 217, 235)
  );
  border: 1px solid #dddddd;
  border-radius: 3px;
}
.subtotal__gift {
  display: flex;
  align-items: center;
}
.subtotal__gift > input {
  margin-right: 5px;
}
.subtotal > button {
  background: #f0c14b;
  height: 30px;
  margin-top: 10px;
  border: 1px solid;
  border-radius: 3px;
  margin-top: 10px;
  border-color: #a88734, #9c7e31, #846a29;
  color: #111;
}