html {
  color-scheme: dark light;
  font-family: sans-serif;
}

body {
  margin: 0;
}

header {
  position: fixed;
  inset: 0 0 auto;
  padding: 0 0.5rem;
  height: 3rem;
  z-index: 1;
  overflow: hidden;

  border-bottom: 2px canvastext solid;
  background-color: canvas;

  user-select: none;

  & > a {
    font-size: 1.5rem;
    color: canvastext;
    text-decoration: none;

    &::before {
      content: "";
      display: inline-block;
      background-color: canvastext;
      width: 2rem;
      height: 2rem;
      mask-image: url(/favicon.svg);
      vertical-align: calc(0.5cap - 1.5rem);
      margin: 0.5rem 0.3rem 0.5rem 0;
    }
  }
}

main {
  margin: 4rem auto 0;
  width: clamp(60vw, 600px, calc(100vw - 14px));
  min-height: calc(100vh - 10rem);
  box-sizing: border-box;
  padding: 0 8px 2rem 6px;
  border-left: 2px graytext solid;

  & section {
  padding: 0 0 5px 6px;
  border-left: 2px graytext solid;
  }

  & :is(h1, h2, h3, h4, h5, h6) {
    margin: 0.5rem -15px 0 -15px;
    padding: 0 0 0 15px;
    border-bottom: 2px graytext solid;
    position: relative;
    &::before {
      content: '';
      display: inline-block;
      position: absolute;
      inset: -1px auto 0 4px;
      width: 8px;
      vertical-align: top;
      background-color: canvas;
    }
  }
}

footer {
  height: 6rem;
  border-top: 2px canvastext solid;
  box-sizing: border-box;
}