/* =============================================================
   PLAYGROUND PROJECT SHELL
   The portfolio's own case-study shell (hero masthead, chapter
   rhythm, presentation frame, project footer nav), adapted for
   Playground project pages. Chrome only — typography, colour and
   spacing here all come from the portfolio's variables.css, the
   same as every other page. Each project sets one accent via
   --project-accent (the only thing that changes page to page).
   ============================================================= */

.pg-project {
  --chapter-gap: clamp(3.25rem, 6vw, 5.5rem);
}

/* =============================================================
   HERO — masthead only, no thumbnail. A project page opens like
   a case study, then gets straight out of the way.
   ============================================================= */
.proj-hero {
  padding-top: var(--space-6);
  padding-bottom: var(--space-2);
}

.proj-hero__masthead {
  max-width: 52ch;
}

.proj-hero__eyebrow {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--project-accent);
}

.proj-hero__title {
  font-family: var(--font-serif);
  font-size: var(--text-display);
  font-weight: var(--weight-semibold);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-top: var(--space-3);
}

.proj-hero__oneline {
  margin-top: var(--space-5);
  max-width: 46ch;
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
}

.proj-hero__tags {
  margin-top: var(--space-6);
}

/* =============================================================
   CHAPTER SHELL — one topic per section, a big faint index
   number, an eyebrow, a title. Identical rhythm to the case
   studies so the page reads as another one of them.
   ============================================================= */
.chapter {
  padding-block: var(--chapter-gap);
}

.chapter__head {
  max-width: 46ch;
  margin-bottom: var(--space-7);
}

.chapter__index {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: var(--weight-regular);
  line-height: 1;
  color: var(--color-surface);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.chapter__eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--project-accent);
}

.chapter__title {
  font-size: var(--text-2xl);
  margin-top: var(--space-2);
}

.chapter__lead {
  margin-top: var(--space-4);
  max-width: 52ch;
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
}

.chapter--tight {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

/* =============================================================
   FRAME — the presentation container every specimen lives in.
   A quiet gallery wall: it frames the work, never competes with
   it. Neutral, generously padded, softly bordered.
   ============================================================= */
.frame {
  position: relative;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background: var(--color-surface-soft);
  padding: clamp(1.5rem, 5vw, 3rem);
}

/* =============================================================
   CLOSING — a quiet documentation colophon, not a reflection.
   Same tight rhythm as a case study's final beat.
   ============================================================= */
.closing {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.closing__inner {
  max-width: 58ch;
}

.closing__title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
}

.closing__text {
  margin-top: var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--text-md);
}