* {
  margin: 0;
  padding: 0;
  font-family: "poppins", sans-serif;
  box-sizing: border-box;
}

.container {
  width: 100%;
  min-height: 100vh;
  background: linear-gradient(135deg, #000000, #000000);
  padding: 10px;
}

.todo-app {
  width: 100%;
  max-width: 540px;
  background: #1a1a18;
  margin: 100px auto 20px;
  padding: 40px 30px 70px;
  border-radius: 10px;

}

.todo-app h2{
    color: #757a22;
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.todo-app h2 img{
    width: 30px;
    margin-left: 10px;
}

.row{
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #d9e1f0;
    border-radius: 30px;
    padding-left: 20px;
    margin-bottom: 25px;

}

input{
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    padding: 10px;
    font-weight: 14px;

}

button{
    border: none;
    outline: none;
    padding: 16px 50px;
    background: #757a22;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    border-radius: 40px;

}

ul li{
    list-style: none;
    font-size: 17px;
    padding: 12px 8px 12px 50px;
    user-select: none;
    cursor: pointer;
    position: relative;
    color: #fff;
}

ul li::before{
    content: '';
    position: absolute;
    height: 28px;
    width: 28px;
    border-radius: 50%;
    background-image: url(unchecked.png);
    background-size: cover;
    top: 12px;
    left: 8px;
   

}

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

ul li.checked::before{
    background-image: url(checked.png);
}

ul li span{
    position: absolute;
    right: 0;
    top: 5px;
    width: 40px;
    height: 40px;
    font-size: 22px;
    color: #555;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
}

ul li span:hover{
background: #edeef0;

}