:root,
::backdrop {
    --sans-font: Roboto, -apple-system, BlinkMacSystemFont, "Avenir Next", Avenir,
    "Nimbus Sans L", "Noto Sans", "Segoe UI", Arial, Helvetica,
    "Helvetica Neue", sans-serif;
    --mono-font: "Roboto Mono", Consolas, Menlo, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
    --standard-border-radius: 3px;

    --bg: #fff;
    --accent-bg: #f0f0f0;
    --text: #212121;
    --text-light: #585858;
    --border: #585858;
    --accent: #0d47a1;
    --accent-hover: #1266e2;
    --accent-text: var(--bg);
    --code: #d81b60;
    --preformatted: #444;
    --marked: #ffdd33;
    --disabled: #efefef;
}

body {
    font-size: 1rem;
}


button:enabled:hover,
.button:not([aria-disabled="true"]):hover,
input[type="submit"]:enabled:hover,
input[type="reset"]:enabled:hover,
input[type="button"]:enabled:hover,
label[type="button"]:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    filter: brightness(115%); /*TODO var?*/
}

.button:focus-visible,
button:focus-visible:where(:enabled),
input:enabled:focus-visible:where(
  [type="submit"],
  [type="reset"],
  [type="button"],
  [type="radio"],
  [type="checkbox"]
) {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}
input[type="checkbox"],
input[type="radio"] {
    border-color: var(--accent);
    border-width: 2px;
}

body > header {
    display: grid;
    grid-template-columns: auto 1fr auto;
    column-gap: 1rem;
    position: sticky;
    padding: .5rem .5rem 0 .5rem;
    top: 0;
    z-index: 99999;
    border: none;
    box-shadow: 0 2px 5px 0 rgb(0 0 0 / 16%), 0 2px 10px 0 rgb(0 0 0 / 12%);
}

.header-title {
    font-size: 1.75rem;
    font-weight: bolder;
    text-align: left;
}

header .ifes-logo {
    max-height: calc(2.5 * 1rem);
}
header .ifes-logo.vertical {
    display: none;
}

header > button.navbar-toggler,
header > button.navbar-toggler:hover,
header > button.navbar-toggler:active {
    background-color: transparent;
    border: none;
    border-radius: var(--standard-border-radius);
    outline: 0;
    padding-right: 0;
}

header > button.navbar-toggler .hamburger {
    width: calc(6*var(--bar-height));
    height: calc(5*var(--bar-height));
    position: relative;
    margin: 0;
    transform: rotate(0deg);
    -webkit-transition: .5s ease-in-out;
    -moz-transition: .5s ease-in-out;
    -o-transition: .5s ease-in-out;
    transition: .5s ease-in-out;
    cursor: pointer;
}

header > button.navbar-toggler .hamburger span {
    display: block;
    position: absolute;
    height: var(--bar-height);
    width: 100%;
    border-radius: var(--standard-border-radius);
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    -webkit-transition: .25s ease-in-out;
    -moz-transition: .25s ease-in-out;
    -o-transition: .25s ease-in-out;
    transition: .25s ease-in-out;
    background: var(--accent);
}

.hamburger {
    --bar-height: 5px;
}

header > button.navbar-toggler .hamburger span:nth-child(1) {
    top: 0;
    transform-origin: left center;
}

header > button.navbar-toggler .hamburger span:nth-child(2) {
    top: calc(2*var(--bar-height));
    transform-origin: left center;
}

header > button.navbar-toggler .hamburger span:nth-child(3) {
    top: calc(4*var(--bar-height));
    transform-origin: left center;
}

header > button.navbar-toggler .hamburger.open span:nth-child(1) {
    transform: rotate(45deg);
    top: 0;
    left: var(--bar-height);
}

header > button.navbar-toggler .hamburger.open span:nth-child(2) {
    width: 0;
    opacity: 0;
}

header > button.navbar-toggler .hamburger.open span:nth-child(3) {
    transform: rotate(-45deg);
    top: calc(4*var(--bar-height) + 1px);
    left: var(--bar-height);
}

.navbar-collapse {
    z-index: 99998;
    background: var(--bg);
    padding: 1rem;
    column-gap: 0.5rem;

    position: absolute;
    width: 100%;
    list-style-type: none;
    transform-origin: 0 0;
    transform: translate(0, -100%);
    transition: transform 0.5s cubic-bezier(0.77, 0.2, 0.05, 1.0);
    display: grid;
    align-items: start;
    grid-template-columns: auto 1fr;
}

.navbar-collapse.show {
    transform: none;
}