/* ============================================================
   Case study pages (projects/*.html).
   Builds on ../styles/tokens.css, base.css, layout.css, components.css.
   ============================================================ */

@layer sections {
  /* Back bar: hidden when the page is shown inside the viewer dialog. */
  .case-bar {
    padding-block: var(--space-s);

    :root[data-framed] & {
      display: none;
    }
  }

  .case-bar__back {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2xs);
    min-block-size: var(--target-min);
    font-size: var(--text-s);
    font-weight: var(--weight-bold);
    text-decoration: none;

    & .icon {
      rotate: 180deg;
    }

    @media (hover: hover) {
      &:hover {
        text-decoration: underline;
      }
    }
  }

  .case-hero {
    margin-block-start: var(--frame);
    padding-block: var(--space-2xl);

    :root[data-framed] & {
      margin-block-start: var(--frame);
    }
  }

  .case-hero__inner {
    display: grid;
    justify-items: start;
    gap: var(--space-m);
  }

  .case-hero__title {
    font-size: var(--text-2xl);
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-display);
  }

  .case-hero__lead {
    max-inline-size: var(--measure);
    font-size: var(--text-l);
    line-height: 1.45;
  }

  .case-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
  }

  .case-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
    gap: var(--space-m);
    inline-size: 100%;
    margin-block-start: var(--space-s);
  }

  .case-stats__item {
    padding-block-start: var(--space-xs);
    border-block-start: var(--border-width) solid var(--color-panel-line);

    & dt {
      font-size: var(--text-xs);
    }

    & dd {
      margin: 0;
      font-family: var(--font-display);
      font-size: var(--text-xl);
      font-weight: var(--weight-heavy);
      letter-spacing: var(--tracking-tight);
    }
  }

  .case-body {
    display: grid;
    gap: var(--space-2xl);
    padding-block: var(--space-2xl) var(--space-section);
  }

  .case-section {
    display: grid;
    gap: var(--space-s);
    max-inline-size: 48rem;

    & h2 {
      font-size: var(--text-xl);
    }

    & p {
      max-inline-size: var(--measure);
    }
  }

  /* media */
  .case-media {
    display: grid;
    gap: var(--space-xs);
    margin: 0;

    & img {
      inline-size: 100%;
      block-size: 100%;
      object-fit: cover;
      border-radius: var(--radius-l);
    }

    & figcaption {
      font-size: var(--text-s);
      color: var(--color-text-muted);
    }
  }

  .case-media__grid {
    display: grid;
    gap: var(--space-s);

    & img {
      aspect-ratio: 16 / 9;
    }
  }

  @media (width >= 48em) {
    .case-media__grid--2 {
      grid-template-columns: repeat(2, 1fr);
    }

    .case-media__grid--feature {
      grid-template-columns: 2fr 1fr;
      grid-template-rows: repeat(2, auto);

      & img:first-child {
        grid-row: span 2;
      }
    }
  }


  .tag-list--plain li {
    border-color: var(--color-border-strong);
  }

  /* challenge: problem -> solution -> result */
  .challenge {
    display: grid;
    gap: var(--space-m);
    margin: 0;
  }

  .challenge__step {
    display: grid;
    gap: var(--space-3xs);
    padding-inline-start: var(--space-m);
    border-inline-start: var(--focus-width) solid var(--color-accent);

    & dt {
      font-size: var(--text-xs);
      font-weight: var(--weight-bold);
      color: var(--color-text-muted);
    }

    & dd {
      margin: 0;
      max-inline-size: var(--measure);

      & p + p {
        margin-block-start: var(--space-xs);
      }
    }
  }

  /* case-next: keeps the reader moving through projects */
  .case-next {
    display: grid;
    gap: var(--space-3xs);
    padding-block-start: var(--space-l);
    text-decoration: none;
    border-block-start: var(--border-width) solid var(--color-border-strong);

    & small {
      font-size: var(--text-s);
      color: var(--color-text-muted);
    }

    & strong {
      display: inline-flex;
      align-items: center;
      gap: var(--space-xs);
      font-family: var(--font-display);
      font-size: var(--text-xl);
      font-weight: var(--weight-heavy);
      letter-spacing: var(--tracking-tight);
    }

    & .icon {
      transition: translate var(--duration-base) var(--ease-spring);
    }

    @media (hover: hover) {
      &:hover .icon {
        translate: var(--space-xs) 0;
      }
    }
  }
}