/* ==========================================================================
   Parklane — About page
   Rhythm: dark hero → ivory (perspective) → deep green (view) → dark
   (coordination) → ivory (private by design) → full-bleed image → deep
   green (private access).
   ========================================================================== */

.page-about {
  --ab-dark: var(--c-vault);
  --ab-green: #0a2414;
  --ab-hair-dark: rgba(242, 239, 229, 0.12);
  --ab-hair-light: rgba(23, 24, 22, 0.12);
  --ab-muted-dark: #a8a397;
  background: var(--c-obsidian);
}

.ab-section {
  position: relative;
  padding-block: var(--section-y);
}

.ab-ivory { background: var(--c-ivory); color: var(--c-ink); }
.ab-dark  { background: var(--ab-dark); color: var(--c-ivory); }

.ab-ivory .eyebrow { color: var(--c-bronze); }

/* Tone changes meet on a brass hairline */
.ab-section::before,
.ab-view::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(169, 138, 82, 0.4) 30%, rgba(169, 138, 82, 0.4) 70%, transparent 100%);
  pointer-events: none;
}

.ab-heading {
  margin-top: var(--s-6);
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.25rem, 1.4rem + 2.6vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: var(--tracking-heading);
  text-wrap: balance;
}

.ab-heading em { font-style: italic; color: var(--c-limestone); }
.ab-ivory .ab-heading em { color: #6e665a; }

.ab-heading--xl {
  font-size: clamp(2.5rem, 1.3rem + 3.8vw, 5rem);
  line-height: 1.02;
}

.ab-body {
  margin-top: var(--s-5);
  max-width: 32rem;
  font-size: var(--fs-lead);
  line-height: 1.7;
  color: var(--ab-muted-dark);
}

.ab-ivory .ab-body { color: var(--c-ink-muted); }
.ab-body--strong { color: var(--c-ivory); }

/* 1. HERO ========================================================================= */

.ab-hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: min(100svh, 60rem);
  padding-block: calc(var(--header-h) + var(--s-9)) clamp(5rem, 3rem + 6vw, 9rem);
  background: var(--c-obsidian);
  color: var(--c-ivory);
}

.ab-hero > .container { width: 100%; }

.ab-hero__title {
  margin-top: var(--s-7);
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(3rem, 1.3rem + 6.2vw, 7.75rem);
  line-height: 0.98;
  letter-spacing: -0.015em;
}

.ab-hero__title span,
.ab-hero__title em { display: block; }

.ab-hero__title em {
  font-style: italic;
  color: var(--c-limestone);
}

.ab-hero__foot {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: var(--s-7);
  align-items: start;
  margin-top: clamp(4rem, 3rem + 4vw, 7rem);
}

.ab-hero__rule {
  height: 1px;
  margin-top: 0.8em;
  background: rgba(169, 138, 82, 0.5);
}

.ab-hero__lead {
  max-width: 34rem;
  font-size: var(--fs-lead);
  line-height: 1.7;
  color: var(--ab-muted-dark);
}

/* 2. PERSPECTIVE + PRINCIPLES ===================================================== */

.ab-perspective__head {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(3rem, 1rem + 5vw, 7rem);
  align-items: end;
}

.ab-perspective__head .ab-heading { max-width: 16ch; }
.ab-perspective__head .ab-body { margin-top: 0; }

/* An architectural row: four bays between vertical rules, under a brass beam */
.ab-principles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(4rem, 3rem + 4vw, 7rem);
  border-top: 1px solid rgba(169, 138, 82, 0.55);
}

.ab-principle {
  padding: var(--s-6) clamp(1rem, 0.5rem + 1.5vw, 2.25rem) var(--s-4);
}

.ab-principle:first-child { padding-left: 0; }
.ab-principle:last-child  { padding-right: 0; }
.ab-principle + .ab-principle { border-left: 1px solid var(--ab-hair-light); }

.ab-principle__n {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  line-height: 0.8;
  color: rgba(169, 138, 82, 0.7);
}

.ab-principle__title {
  margin-top: var(--s-6);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--c-ink);
}

.ab-principle__text {
  margin-top: var(--s-3);
  font-family: var(--font-serif);
  font-size: 1.3125rem;
  line-height: 1.4;
  color: #4a4740;
}

/* 3. THE PARKLANE VIEW ============================================================ */

.ab-view {
  position: relative;
  overflow: hidden;
  padding-block: clamp(7rem, 4rem + 8vw, 13rem);
  background: var(--ab-green);
  color: var(--c-ivory);
}

.ab-view__lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, transparent 50%, #000 72%, #000 100%);
  mask-image: linear-gradient(90deg, transparent 50%, #000 72%, #000 100%);
}

.ab-view__inner { position: relative; }

.ab-view__title {
  margin-top: var(--s-6);
  max-width: 24ch;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.5rem, 1.4rem + 3.6vw, 5rem);
  line-height: 1.04;
  letter-spacing: var(--tracking-heading);
}

.ab-view__title span,
.ab-view__title em { display: block; }

.ab-view__title em {
  font-style: italic;
  color: var(--c-limestone);
}

.ab-view__copy {
  margin-top: var(--s-7);
  max-width: 34rem;
  font-size: var(--fs-lead);
  line-height: 1.7;
  color: rgba(242, 239, 229, 0.7);
}

/* 4. COORDINATION ================================================================= */

.ab-split {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(3rem, 1rem + 6vw, 8rem);
  align-items: center;
}

.ab-diagram { margin: 0; }

.ab-diagram svg {
  display: block;
  width: 100%;
  max-width: 34rem;
  height: auto;
  margin-inline: auto;
}

/* 5. PRIVATE BY DESIGN ============================================================ */

.ab-private__layout {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: clamp(3rem, 1rem + 5vw, 7rem);
  align-items: end;
}

.ab-private__text .ab-body { margin-top: 0; }

.ab-private__note {
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid rgba(169, 138, 82, 0.5);
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  color: var(--c-ink);
}

/* 6. MONUMENT ===================================================================== */

.ab-monument {
  position: relative;
  height: clamp(32rem, 70vw, 58rem);
  max-height: 92svh;
  overflow: hidden;
  background: #1a1b17;
}

.ab-monument img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 62%;
}

/* a quiet vignette only at the edges, no text over the image body */
.ab-monument::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 36, 20, 0) 70%, rgba(10, 36, 20, 0.9) 100%);
  pointer-events: none;
}


/* 7. PRIVATE ACCESS =============================================================== */

.ab-access {
  position: relative;
  padding-block: clamp(7rem, 5rem + 6vw, 12rem);
  background: var(--ab-green);
  color: var(--c-ivory);
  text-align: center;
}

.ab-access__inner {
  display: grid;
  justify-items: center;
  gap: var(--s-5);
}

.ab-access__rule {
  width: 1px;
  height: 4rem;
  margin-bottom: var(--s-3);
  background: rgba(169, 138, 82, 0.55);
}

.ab-access__title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.25rem, 1.4rem + 2.6vw, 3.75rem);
  line-height: 1.08;
}

.ab-access__copy {
  max-width: 30rem;
  font-size: var(--fs-lead);
  line-height: 1.65;
  color: rgba(242, 239, 229, 0.7);
}

.ab-access .access__link {
  width: 100%;
  max-width: 22rem;
  margin-top: var(--s-5);
}

/* RESPONSIVE ====================================================================== */

@media (max-width: 1024px) {
  .ab-perspective__head,
  .ab-split,
  .ab-private__layout {
    grid-template-columns: 1fr;
  }

  .ab-perspective__head { align-items: start; }

  .ab-principles { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .ab-principle,
  .ab-principle:first-child,
  .ab-principle:last-child { padding: var(--s-6) var(--s-5) var(--s-6); }

  .ab-principle:nth-child(odd) { padding-left: 0; border-left: 0; }
  .ab-principle:nth-child(n + 3) { border-top: 1px solid var(--ab-hair-light); }

  .ab-monument { height: clamp(26rem, 80vw, 40rem); }
}

@media (max-width: 640px) {
  .ab-hero { min-height: 0; }

  .ab-hero__foot {
    grid-template-columns: 1fr;
    gap: var(--s-5);
  }

  .ab-hero__rule { width: 4rem; }

  .ab-principles { grid-template-columns: 1fr; }

  .ab-principle,
  .ab-principle:first-child,
  .ab-principle:last-child {
    padding: var(--s-6) 0;
    border-left: 0;
  }

  .ab-principle + .ab-principle {
    border-left: 0;
    border-top: 1px solid var(--ab-hair-light);
  }

  .ab-monument { height: 30rem; }


  /* diagram labels scale with the drawing; lift them to stay legible */
  .ab-diagram svg text { font-size: 14px; letter-spacing: 0.08em; }

  .ab-view__lines { -webkit-mask-image: linear-gradient(180deg, transparent 60%, #000 85%); mask-image: linear-gradient(180deg, transparent 60%, #000 85%); }
}