* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body{
    font-family: 'B Nazanin';
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
.container{
    width: 600px;
}

header{
    background-color: orange;
    text-align: center;
    padding: 30px;
    color: white;
    border-radius: 5px;
}

header h1{
    margin-bottom: 30px;
}

input{
    font-family: 'B Nazanin';
    width: 75%;
    float: left;
    font-size: 20px;
    padding: 10px;
    border-radius: 5px;
    border: none;
    outline: none;
    
}

button{
    color: white;
    width: 22%;
    font-size: 20px;
    float: right;
    padding: 10px;
    background-color: rgb(203, 197, 197);
    border-radius: 5px;
    cursor: pointer;
}
button:hover{
    background-color: gray;
}
header::after{
    content: "";
    display: table;
    clear: both;
}

.task-list{
    max-height: 300px;
    overflow-y: auto;
}
.task-list li{
    list-style-type: none;
    background-color: rgb(220, 220, 220);
    padding: 25px;
    font-size: 20px;
    user-select: none;
    color: gray;
    transition: all 250ms;
    position: relative;
}

.task-list li:hover{
    background-color: gray;
    color: white;
}
li span{
    position: absolute;
    right: 25px;
    color: black;
}

li .trash:hover{
    color: red;    
    display: inline-block;
}
.check{
    margin-right: 10px;
    font-weight: bold;
    font-size: 25px;
}