@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

*{
    font-family: "Poppins", sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}
header{
    background-color: #4f4b57;
    color: #fff;
    padding: 20px;
}
header h1{
    display: flex;
    justify-content: center;
    align-items: center;
    color: rgb(0, 0, 0);
}

.content {
   
    max-width: 450px;
    margin: 50px auto;
    padding: 30px;
    
    
    background: rgba(255, 255, 255, 0.1); 
    backdrop-filter: blur(15px);        
   
    
    
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2); 
    
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    text-align: center;
}


.content input{
    width: 300px;
    height: 40px;
    padding: 10px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
}
.btn{
    width: 100px;
    height: 40px;
    margin-left: 10px;
    border: none;
    border-radius: 5px;
    background-color: #4f4b57;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
}

.btn:hover{
    background-color: #3e3a45;
}
.options {
  display: flex;         
  justify-content: center; 
    align-items: center;
  gap: 20px;             
  margin-top: 40px;
  
  

}
.btn2{
   height: 40px;
     border: none;
    border-radius: 5px;
    background-color: #4f4b57;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
}
.btn2:hover{
    background-color: #3e3a45;
}

ul li {
    list-style: none;
    padding-left: 45px; 
    margin-bottom: 15px;
    font-size: 18px;
    display: flex;
    align-items: center;
    position: relative; 
    color: white;
    cursor: pointer;
    user-select: none; 
}


ul li::before {
    content: "";
    position: absolute;
    left: 8px;
    width: 25px;
    height: 25px;
    border: 2px solid #4f4b57;
    border-radius: 50%;
    background: url(images/unchecked.png) no-repeat;
    background-size: cover;
    background-position: center;
    transition: 0.2s;
}
ul li.checked {
    text-decoration: line-through;
    color: #888;
}

ul li.checked::before {
   
    background: url(images/checked.png) no-repeat;
    background-size: cover;
    background-position: center;
    border-color: transparent;
}
ul li span{
    width:40px;
    height: 40px;
    right:0;
    position: absolute;
    top:5px;
    border-radius: 50%;
    font-size: 22px;
    text-align: center;
    line-height: 40px;
}
ul li span:hover{
    background-color: #3e3a45;
}