:root {
  --secondary-condensed: var(--secondary) /*"u001con", sans-serif*/;
  --mono: Berkeley Mono, Monaspace Neon, monospace, monospace;
  --interactive-bg-hover: color-mix(in hsl, var(--bg), 20% var(--fg));
  --interactive-fg-hover: var(--fg);

  color-scheme: dark;
  font-size: calc(18em / 16);
  font-family: var(--text);
  background: var(--bg);
  color: var(--fg);

  margin: 0 !important;
  padding: 0 !important;
}

html, body {
  margin: 0;
  padding: 0;
}

* {
  box-sizing: border-box;
}

:where(p, ul, ol) {
  margin-block: 1lh;
}

ul[role=list] {
  list-style: none;
  padding: 0;
}

a {
  color: var(--link);
  text-decoration: 1px solid underline color-mix(in hsl, var(--link), 22% var(--bg));

  &:hover, &:focus-visible {
    background: var(--interactive-bg-hover);
    color: var(--interactive-fg-hover);
  }
  &:focus-visible {
    outline: 1px solid var(--fg);
    text-decoration: none;
  }
}

.hypersys-cover {
  display: grid;
  grid-template-columns: 1fr 40em 1fr;
  gap: 3rlh;
  overflow: clip;

  grid-template-areas:
    "cover1  title  cover2"
    "cover1 content cover2";
}

.cover-image {
  width: calc((100vw - 40em - 2*3rlh) / 2);
  background: none !important;

  &.-one {
    grid-area: cover1;
    img {
      object-position: right;
    }
  }
  &.-two {
    grid-area: cover2;
    img {
      object-position: left;
    }
  }
  img {
    width: 100%;
    min-height: 100vh;
    padding-block: 10vh;
    object-fit: cover;

    position: sticky;
    top: 0;

    filter:
      drop-shadow(0 0 1px var(--fg))
      drop-shadow(0 .1em .2em black)
      ;
  }
}

@media (width <= 1024px) {
  .hypersys-cover {
    padding: 1rlh;
    grid-template-columns: 1fr min(50%, 20em) min(50%, 20em) 1fr;
    gap: 0;
    grid-template-rows: auto auto auto;
    grid-template-areas:
      ". title title ." "cover1 cover1 cover2 cover2" ". content content .";
  }

  .cover-image {
    width: auto;
    height: auto;
    overflow: visible;
    max-height: 50vh;
    margin-block-start: 2rlh;
    margin-inline: 0;
    & ~ & { margin-inline-start: 1rlh; }
    img {
      height: 100%;
      min-height: 0;
      object-fit: contain;
      position: static;
      padding-block: 0;
    }
  }
}

.book-title {
  grid-area: title;
  font-family: var(--display);
  font-weight: normal;
  font-size: clamp(1em, 5vw, 6em);
  margin-block: 1rlh 0;
  text-transform: uppercase;
  text-align: center;
  text-shadow: 0 calc(1em/14) #bbf7ff;
  color: #1d87a9;
  @media (prefers-color-scheme: dark) {
    text-shadow: 0 calc(1em/14) #1d87a9;
    color: #bbf7ff;
  }
}

.cover-info {
  grid-area: content;
  font-family: var(--secondary-condensed);
  margin-block-end: 3rlh;
  text-align: justify;
  hyphens: auto;
}

.book-title, .cover-info {
  padding-inline: 1rlh;
  place-self: center;
}

.big-blurb {
  font-family: var(--secondary);
  font-size: 1.5em;
  margin-block: 1lh;
}

.formats-list {
  display: flex;
  flex-flow: row wrap;
  justify-content: center;
  align-items: end;
  column-gap: 1lh;

  max-width: 26em;
  margin: auto;

  > .book-format {
    flex: 0 1 7rem;
    margin-block: .5lh;
    &:not(:has(.cover)) {
      flex: 0 0 auto;
    }
  }
}

.book-format {
  display: flex;
  font-family: var(--secondary);
  line-height: 1;

  &:has(.cover) {
    flex-flow: column;
    align-items: center;
  }
  &:not(:has(.cover)) {
    flex-flow: row;
    gap: .5ch;
  }
  .name {
    order: 2;
    font-family: var(--secondary);
    font-weight: bold;
    &:not(:hover, :focus-visible) {
      text-decoration: none;
    }
  }
  .cover {
    order: 1;
  }
  .vendor {
    order: 3;
    font-size: 1em;
    color: color-mix(in hsl, var(--fg), var(--bg));
    font-family: var(--secondary-condensed);
  }
}

.flex-break {
  display: block;
  flex: 1 0 100%;
}

.small-blurb {
  --font-family: var(--text);
}

.impressum-section {
  .authors {
    font-family: var(--secondary-condensed);

    text-align: center;
    text-wrap: balance;

    li {
      display: inline-block;
      margin: .25lh .5lh;
      text-align: center;
    }

    a:not(:hover, :focus-visible) {
      text-decoration: none;
    }
  }

  .copyright {
    font-family: var(--secondary-condensed);
    color: color-mix(in srgb, 50% var(--fg), var(--bg));
  }
}