*, ::before, ::after { box-sizing: border-box; }
html { line-sizing: normal; }
body { margin: 0; }
[hidden] { display: none; }
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.17rem; }
h4 { font-size: 1.00rem; }
h5 { font-size: 0.83rem; }
h6 { font-size: 0.67rem; }

h1 { margin: 0.67em 0; }

pre { white-space: pre-wrap; }
hr {
  border-style: solid;
  border-width: 1px 0 0;
  color: inherit;
  height: 0;
  overflow: visible;
}
img, svg, video, canvas, audio, iframe, embed, object {
  display: block;
  vertical-align: middle;
  max-width: 100%;
}
audio:not([controls]) { display:none; }
picture { display: contents; }
source { display: none; }
img, svg, video, canvas {
  height: auto;
}
audio { width: 100%; }