:root{
    --mainColor: #434dc5;
    --mainColorHover: #3a40b3;
}
body{
    background-color: #f5f5f5;
}
.container{
    padding: 75px;
}

.headline{
    padding-bottom: 20px;
}

h1{
    color: var(--mainColor);
    font-size: 50px;
}

.form-control{
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 8px;
}

.btn-add{
    background-color: var(--mainColor);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-add:hover{
    background-color: var(--mainColorHover);
    color: white;
}


/* list of tasks */
#list{
    list-style: none;
    padding-left: 5px;
}


ul li{
    margin-bottom: 10px;  
    list-style: none;
    padding: 10px 0px 9px 50px;
    user-select: none;
    cursor: pointer;
    position: relative;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    background-color: white;
}

ul li::before{
content: '';
position: absolute;
width: 20px;
height: 20px;
border-radius: 50%;
background-image: url(images/uncheck.png);
background-size: cover;
background-position: center;
top: 12px;
left: 8px;

}

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

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

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

ul li span:hover{
    background-color: #edeef0;
}
/* list of tasks */


.footer{
    margin-top: auto;
    margin-top: 50px;
    text-align: center;
    color: #555;
}