body{
    margin: 0;

}
h1{
    text-align: center;
}
form{
    text-align: center;
    margin-bottom: 30px;
}
input{
    padding: 8px;
    width: 50%;
}
button{
    padding: 8px 20px;
    background-color: cornflowerblue;
    color: white;
    border: none;
    cursor: pointer;
}
button:hover{
    background-color: darkslateblue;
}
ul{
    list-style: none;
}
li{
    padding: 8px;
    border-bottom: 1px solid cornflowerblue;
}
.eliminar-btn{
    background-color: darkred;
    color: white;
    border: none;
    padding: 6px 15px;
    cursor: pointer;
    float: right;
}
.eliminar-btn:hover{
    background-color: crimson;
}
.completada{
    text-decoration: line-through;
    color:brown;
}