.btn-exsm {
    padding-top: 1px;
    padding-bottom: 1px;
}

pre {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: auto !important;
}

html, body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
}

main {
    flex: 1 0 auto;
}