html, input {
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    line-height: 1.5;
    color: #333;
}

body {
    padding: 1.5rem 1.5rem 3rem 1.5rem;
    margin: 0;
    font-size: 1rem;
    background-color: #fff
}

.container {
    max-width: 40rem;
    margin-left: auto;
    margin-right: auto;
}

h1, h2 {
    margin-top: 0;
    line-height: 1;
    text-rendering: optimizelegibility
}

h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

h2 {
    margin-top: 3rem;
    margin-bottom: 1rem
}


p {
    margin-top: 0;
    margin-bottom: 1rem
}

    p.subtitle {
        font-size: 1.25rem;
        color: #555
    }

    p.hint {
        font-size: 0.8rem;
    }

a {
    color: #1b75d0;
    text-decoration: none;
}

    a:hover {
        text-decoration: underline;
    }

form {
    display: flex;
    flex-wrap: wrap;
    flex-direction: column;
    width: 100%;
}

    form label {
        margin: 0;
        border: 1px solid #ddd;
        padding: 0.5rem;
        border-right-width: 0;
        background-color: #e6e6e6;
        color: #555;
    }

    form input {
        flex: 1;
        vertical-align: middle;
        padding: 0.5rem;
        background-color: #fff;
        border: 1px solid #ddd;
        border-bottom-width: 0;
        border-right-width: 1px;
    }

        form input:focus {
            border: 1px solid #333;
            outline: none;
        }

    form button {
        padding: 0.5rem 1rem;
        background-color: #333;
        color: white;
        border: none;
    }

        form button:hover {
            background-color: #000;
            cursor: pointer;
        }

@media (min-width: 640px) {
    form {
        flex-direction: row;
    }

        form input {
            border-right-width: 0;
            border-bottom-width: 1px;
        }
}

pre {
    max-height: 30rem;
    overflow-y: auto;
    background-color: #fbfbfb;
}

footer {
    margin-top: 3rem;
}

    footer p {
        margin-bottom: 0;
    }