@font-face {
  font-family: Roboto;
  src: url(./Roboto-Regular.ttf) format("truetype");
}

@font-face {
  font-family: Roboto;
  src: url(Roboto-Italic.ttf);
  font-style: italic;
}

@font-face {
  font-family: Roboto;
  src: url(Roboto-Light.ttf);
  font-weight: 200;
}

@font-face {
  font-family: Roboto;
  src: url(Roboto-LightItalic.ttf);
  font-style: italic;
  font-weight: 200;
}

@font-face {
  font-family: Roboto;
  src: url(Roboto-Bold.ttf);
  font-weight: 700;
}

@font-face {
  font-family: Roboto;
  src: url(Roboto-BoldItalic.ttf);
  font-style: italic;
  font-weight: 700;
}

@font-face {
  font-family: Roboto;
  src: url(Roboto-Black.ttf);
  font-weight: 900;
}

@font-face {
  font-family: Roboto;
  src: url(Roboto-BlackItalic.ttf);
  font-style: italic;
  font-weight: 900;
}

:root {
  --font-family: Roboto, Ubuntu, 'Open Sans', 'Helvetica Neue', Helvetica, sans-serif;
  --font-size-root: 20px;
  --font-weight-thin: 200;
  --font-weight-normal: 400;
  --font-weight-bold: 700;
  --font-weight-bolder: 900;
}

a, a:link, a:visited {
  font-weight: var(--font-weight-normal);
}

header {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

h1 {
  margin-top: 0;
  margin-bottom: 0;
  font-weight: var(--font-weight-bold);
}

header p {
  margin-top: 0;
  font-size: 1em;
}

main {
  max-width: 1000px;
  margin: auto auto;
}

.flex {
  display: flex;
  flex-wrap: wrap;
}

.flex > * {
  margin-right: 1rem;
}

.a11y-hidden {
  position: absolute;
  display: block;
  left: -1000in;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.a11y-focus:focus {
  left: auto;
  width: auto;
  height: auto;
  overflow: auto;
}

.main-menu {
  width: 100%;
  position: relative;
  z-index: 1;
}

.main-menu ul {
  list-style: none;
  padding-left: 0;
}

.main-menu ul li > div {
  font-weight: var(--font-weight-bold);
  margin-top: 1rem;
}

.main-menu button {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 50%;
  background:
    linear-gradient(45deg, #0000 45%, #fff 0 55%, #0000 0) 50% 50% / 50% 50% no-repeat,
    linear-gradient(-45deg, #0000 45%, #fff 0 55%, #0000 0) 50% 50% / 50% 50% no-repeat;
  background-color: var(--primary);
}

.main-menu button span {
  position: absolute;
  left: -999in;
}

.main-menu.closed {
  position: fixed;
  padding: 1rem;
  top: 0;
  left: 0;
}

.main-menu.closed button {
  background: linear-gradient(#fff 15%, #0000 0 42.5%, #fff 0 57.5%, #0000 0 85%, #fff 0) 50% 50% / 50% 50% no-repeat;
  background-color: var(--primary);
}

.main-menu.closed ul,
.main-menu.closed h2 {
  display: none;
}

details summary {
  background: 
  radial-gradient(at 50% 100%, #ff03, #ff00),
  linear-gradient(135deg, #80d6f755, #c597c555);
  background: #f4f6f8;
}

section {
  margin-bottom: 3rem;
}

code {
  font-weight: var(--font-weight-normal);
}

table code {
  white-space: nowrap;
}

.demo {
  margin: 2rem 0 5rem 0;
}

.demo > summary {
  position: relative;
}

.demo > summary::after {
  content: "";
  position: absolute;
  right: 0.5rem;
  top: 5%;
  height: 90%;
  aspect-ratio: 1;
  background: url(./chipmunk-face.svg);
  background-size: cover;
}

#source-code {
  height: 30rem;
  width: 30rem;
  max-width: 100%;
}


@media (min-width: 768px) {
  :root {
    --font-size-root: 100%;
  }

  .main-menu,
  .main-menu.closed {
    overflow: auto;
    width: 250px;
    min-width: 250px;
    height: 100vh;
    padding: 1rem;
    box-sizing: border-box;
    border-right: 1px solid #eee;
    background:
      radial-gradient(at 100% 50%, #ff03, #ff00),
      linear-gradient(45deg, #80d6f755, #c597c555)
      ;
    position: fixed;
    top: 0;
    left: 0;
  }

  .main-menu h2 {
    font-size: 1.35rem;
    margin-top: 0;
  }

  .main-menu button {
    display: none;
  }

  .main-menu.closed h2,
  .main-menu.closed ul {
    display: block;
  }

  header {
    height: auto;
  }

  body {
    margin: 0;
  }

  body > div {
    margin-left: 250px;
  }
}