* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}
.container {
  width: 100%;
  height: 100vh;
  padding: 5px;
  background: linear-gradient(135deg, #063502, #090179);
}
.to-do-app {
  max-width: 450px;
  margin: 100px auto 0px;
  background: #fff;
  border-radius: 30px;
  padding: 20px;
}
.title {
  display: flex;
  align-items: center;
  justify-content: center;
}
.title h1 {
  font-size: 25px;
  font-weight: 600;
  margin-right: 5px;
}
.title img {
  width: 40px;
}
.search {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 25px auto;
  border-radius: 25px;
  padding-left: 15px;
  background: #b7b2b27c;
}
.search input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 16px;
  background: transparent;
}
.search button {
  border: none;
  outline: none;
  padding: 10px 30px;
  background: #e70808;
  border-radius: 25px;
  font-size: 20px;
  color: #fff;
}
ul {
  list-style: none;
}
ul li {
  position: relative;
  padding: 12px 8px 12px 50px;
  font-size: 17px;
  cursor: pointer;
  user-select: none;
}
/* li:nth-child(2n) {
  background-color: rgba(240, 165, 165, 0.202);
  border-radius: 25px;
} */

ul li::before {
  content: "";
  position: absolute;
  width: 25px;
  height: 25px;
  top: 10px;
  left: 10px;
  border-radius: 50%;
  background-image: url(./images/unchecked.png);
  background-size: cover;
  background-position: center;
}

ul li.checked {
  color: #555;
  text-decoration: line-through;
}

ul li.checked::before {
  background-image: url(./images/checked.png);
}
ul li span {
  position: absolute;
  right: 0;
  top: 4px;
  width: 40px;
  height: 40px;
  font-size: 22px;
  color: #555;
  line-height: 40px;
  text-align: center;
  border-radius: 50%;
}
ul li span:hover {
  background: #ccc;
}