* {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  list-style: none;
}

body {
  background: rgb(2, 0, 36);
  background: linear-gradient(
    90deg,
    rgba(2, 0, 36, 1) 0%,
    rgba(121, 9, 120, 1) 67%,
    rgba(0, 212, 255, 1) 100%
  );
}

.container {
  width: 600px;
  margin: auto;
  margin-top: 50px;
}

.container h1 {
  text-align: center;
  color: white;
  padding: 30px 0px;
}

.container input {
  padding: 10px 10px;
  width: 83%;
  font-size: 18px;
  border-radius: 5px;
}

.submit_button {
  padding: 10px 15px;
  cursor: pointer;
  font-size: 18px;
  background-color: red;
  color: White;
  border-radius: 5px;
}

button {
  cursor: pointer;
  margin-left: 5px;
}

.container ul {
  margin-top: 30px;
}

.container ul li {
  background-color: beige;
  padding: 10px;
  border-radius: 7px;
  font-size: 18px;
  display: flex;
  justify-content: space-between;
  position: relative;
  margin-bottom: 15px;
}

.container ul li div {
  display: flex;
  gap: 10px;
}

.complete {
  background-color: green !important;
  color: white;
  text-decoration: line-through;
}