landing-app/landing/src/app/ui/_detail.scss

// The layout every page reached by its address shares — a content page, a
// project, a member — so moving between them reads as one site.
//
// A partial each body `@use`s rather than a global sheet: component styles are
// scoped, and each body gets its own scoped copy of these rules.

// The top of the page is the landing's hero, minus the stats and buttons: the
// same left edge as the logo, the same heading weight.
.content-hero {
  padding-block: 5rem 2.5rem;

  @media (min-width: 768px) {
    padding-block: 7rem 3.5rem;
  }
}

.content-hero__title {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.content-hero__lead {
  max-width: 46ch;
  margin: 1.5rem 0 0;
}

// Reading column and a side column, on the landing's own grid width. The
// column keeps prose to a readable measure; the side keeps the page from
// ending in a dead end.
.content-page__layout {
  display: grid;
  gap: 3rem;
  padding-bottom: 5rem;

  @media (min-width: 1024px) {
    grid-template-columns: minmax(0, 46rem) minmax(16rem, 20rem);
    justify-content: space-between;
    gap: 4rem;
    padding-bottom: 7rem;
  }
}

.content-page__media {
  margin: 0 0 2.5rem;
  overflow: hidden;
  border-radius: var(--pi-theme-card-radius, 1.5rem);
}

// The `<img>` belongs to `app-api-image`, so a scoped rule cannot reach it.
.content-page__media ::ng-deep img {
  display: block;
  width: 100%;
  height: auto;
}

.content-page__body {
  font-size: 1.0625rem;

  // The body is HTML from the panel's editor, not this component's template,
  // so it carries none of the scoping attributes: only `::ng-deep` reaches it.
  // Confined to this container, it styles nothing else on the page.
  ::ng-deep {
    // Bold, like every heading on the landing — a light heading here was the
    // one thing that made the page read as another site.
    h2 {
      margin: 3rem 0 1rem;
      font-size: clamp(1.5rem, 3vw, 1.875rem);
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.015em;
    }

    h3 {
      margin: 2rem 0 0.75rem;
      font-size: 1.25rem;
      font-weight: 700;
    }

    // One rhythm for both: left alone, the library's sheet sets paragraphs
    // tighter than list items and the body reads in two different spacings.
    p,
    li {
      line-height: 1.7;
    }

    p {
      margin: 0 0 1rem;
    }

    // The bullet outside the text, where a list's bullet goes. `@pi/ui`'s
    // reset puts it inside, and the editor wraps each item's text in a `<p>`:
    // together the bullet sat alone on one line and the text, a block, fell to
    // the next — with a paragraph's margins on top.
    ul,
    ol {
      margin: 0 0 1.5rem;
      padding-left: 1.5rem;
    }

    li {
      margin: 0 0 0.5rem;
      padding-left: 0.25rem;
      list-style-position: outside;

      &::marker {
        color: var(--pi-color-primary);
      }

      > p {
        margin: 0;
      }
    }

    strong {
      font-weight: 700;
    }

    a {
      color: var(--pi-color-primary);
    }

    code {
      padding: 0.1em 0.35em;
      border-radius: 0.375rem;
      background: color-mix(in srgb, var(--pi-color-primary) 10%, transparent);
      font-size: 0.9em;
    }

    pre {
      margin: 0 0 1.5rem;
      padding: 1rem 1.25rem;
      overflow-x: auto;
      border-radius: var(--pi-border-radius-medium, 0.75rem);
      background: color-mix(in srgb, var(--pi-color-primary) 7%, transparent);
      line-height: 1.55;

      code {
        padding: 0;
        background: none;
      }
    }

    // `@pi/ui` already frames a quote with its own quotation marks; only the
    // spacing is this page's business.
    blockquote {
      margin: 0 0 1.5rem;

      p:last-child {
        margin-bottom: 0;
      }
    }

    hr {
      margin: 2.5rem 0;
      border: 0;
      border-top: 1px solid color-mix(in srgb, currentColor 15%, transparent);
    }

    // Images in the text — attached in the panel's editor, or by URL through
    // the API. Never wider than the column, and set apart from the prose.
    img {
      display: block;
      max-width: 100%;
      height: auto;
      margin: 2rem 0;
      border-radius: var(--pi-border-radius-medium, 0.75rem);
    }

    figure {
      margin: 2rem 0;

      img {
        margin: 0;
      }
    }

    figcaption {
      margin-top: 0.5rem;
      font-size: 0.875rem;
      color: color-mix(in srgb, currentColor 68%, transparent);
    }

    > :first-child {
      margin-top: 0;
    }
  }
}

.content-page__aside {
  display: flex;
  flex-direction: column;
  gap: 2rem;

  // Stays in view beside a long page, under the sticky header.
  @media (min-width: 1024px) {
    position: sticky;
    top: 6rem;
    align-self: start;
  }
}

.content-page__related {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

// `landing-card` is the landing's card surface and hover, drawn on a link
// rather than on `pi-card`, which brings no padding or radius of its own here.
.content-page__card,
.content-page__cta {
  display: block;
  padding: 1.25rem 1.5rem;
  border-radius: var(--pi-theme-card-radius, 1.5rem);
  box-shadow: var(--pi-theme-card-shadow, none);
}

.content-page__card {
  color: inherit;
  text-decoration: none;
}

.content-page__card-title {
  display: block;
  font-size: 1.0625rem;
  font-weight: 700;
}

.content-page__card-text {
  display: -webkit-box;
  margin-top: 0.375rem;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  font-size: 0.875rem;
  line-height: 1.5;
  // Relative to the card's own text colour, so it holds up in dark mode too,
  // where the grey token is nearly the background.
  color: color-mix(in srgb, currentColor 68%, transparent);
}

.content-page__cta {
  padding: 1.5rem;

  // The call to action is not a link as a whole, so it does not lift.
  &:hover {
    transform: none;
  }

  p {
    margin: 0.5rem 0 1.25rem;
    line-height: 1.6;
  }
}

.content-page__cta-title {
  margin: 0;
  font-size: 1.375rem;
  font-weight: 700;
}

// Hero actions — a demo, a repository — and the chips under them.
.content-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;

  a {
    text-decoration: none;
  }
}

.content-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

// A section inside the reading column, under its own bold heading.
.content-page__section {
  margin-top: 3.5rem;

  > h2 {
    margin: 0 0 1.25rem;
    font-size: clamp(1.5rem, 3vw, 1.875rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.015em;
  }
}

.content-page__main > :first-child {
  margin-top: 0;
}

// A card in the side column that holds facts rather than a link.
.content-page__panel {
  display: block;
  padding: 1.25rem 1.5rem;
  border-radius: var(--pi-theme-card-radius, 1.5rem);
  box-shadow: var(--pi-theme-card-shadow, none);

  &:hover {
    transform: none;
  }

  h2 {
    margin: 0 0 1rem;
    font-size: 1.0625rem;
    font-weight: 700;
  }
}

// Label and value, one pair a row.
.content-page__facts {
  display: grid;
  gap: 0.875rem;
  margin: 0;

  dt {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: color-mix(in srgb, currentColor 60%, transparent);
  }

  dd {
    margin: 0.125rem 0 0;
  }

  a {
    color: var(--pi-color-primary);
  }
}

.content-page__muted {
  color: color-mix(in srgb, currentColor 68%, transparent);
}

// Lists this layout spaces with `gap`. `@pi/ui`'s reset adds a top margin to
// every `li + li`, which suits a list of prose and staggers everything else.
.content-hero__chips,
.content-page__related {
  > li {
    margin: 0;
  }
}

.content-hero__chips {
  align-items: center;
}