body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: rgb(255, 255, 255);
    margin: 0 auto;
    width: 700px;
    border: 3px solid rgb(0, 0, 0);
    padding: 0 2em 1em;
}

h1,
h3 {
    color: rgb(0, 0, 0);
}

div {
    margin-bottom: 1em;
}

label {
    display: inline-block;
    width: 7em;
    text-align: right
}

input {
    margin-right: 0.5em;
}

span {
    color: red;
}

#output {
    float: right;
    width: 20em;
    margin: 0 0 .5em;
    padding: 1em;
    border: 2px solid rgb(0, 0, 0);
    min-height: 10em;
}

#tasks a {
    margin-right: 0.5em;
}

.clear {
    clear: both;
}

@media (max-width: 600px) {
    body {
        padding: 30px;
        font-size: 1rem;
    }

    h1,
    h3 {
        font-size: 1.5rem;
        flex-direction: column;
        align-items: center;
    }
    #output {
        float: none;
        width: 100%;
        margin-top: 1em;
    }
}

@media (min-width: 601px) and (max-width: 1024px) {
    body {
        padding: 60px;
        font-size: 1.1rem;
    }

    h1,
    h3 {
        font-size: 2rem;
    }

    #output {
        float: none;
        width: 100%;
        margin-top: 1em;
    }
}