/* :root {
    font-size: 16px;
} */

html {
    box-sizing: border-box;
}

*, *::before, *::after { box-sizing: inherit; margin: 0; padding: 0; }
img { box-sizing: content-box }

h1, h2, h3, h4, h5, h6, p, ul, ol, table, canvas {
    margin: 1em;
}

li, input, button {
    margin-left: 1em;
    margin-right: 1em;

    font-weight: bold;
}

body {
    font-family: Arial, Helvetica, sans-serif;
}

h1 {
    text-align: center;
}

.back-btn {
    margin: 2em;
    font-weight: bold;
}


.text-bf {
    font-weight: bold;
}

.text-it {
    font-style: italic;
}

.text-center {
    text-align: center;
}

.img-center {
    margin: auto;
    display: block;
}