html {
    font-size: 12px;
    font-family: sans-serif;
}

body {
    margin: 0;
}

h1 {
    text-align: center;
    font-size: 18px;
}

h2 {
    font-size: 16px;
}

.file {
    display: none;
    margin-left: 30px;
}	

.open {
    color: red;
    font-weight: 400;
}

.done {
     color: grey;
     text-decoration: line-through;
}

.line {
    font-size: 16px;
    cursor: pointer;
    margin-top: 5px;
}