/* ============================================================
   Section 3 · Residences — "Room to Breathe"
   Not a row of pricing cards: an editorial intro over an
   expanding-panel gallery of the three configurations, closed
   with a wide "Private Decks" feature band.
     · click a panel spine to open it — one open at a time
     · each open panel carries area + a pricing placeholder slot
   Below 900px the gallery unstacks into full-width tiles.
   ============================================================ */

.s3 {
  position: relative;
  overflow: hidden;
  background: var(--ground);
  padding: clamp(5rem, 13vh, 9.5rem) 0;
  isolation: isolate;
}

/* ambient depth: concentric elevation arcs bleeding off the top-left
   corner (an architectural-drawing echo, not a flat glow), deep floor + ceiling */
.s3::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(
      circle at 10% 6%,
      transparent 13.6rem,
      color-mix(in srgb, var(--ember) 22%, transparent) 13.9rem,
      transparent 14.3rem,
      transparent 18.6rem,
      color-mix(in srgb, var(--ember) 14%, transparent) 18.9rem,
      transparent 19.3rem,
      transparent 24.1rem,
      color-mix(in srgb, var(--ember) 8%, transparent) 24.4rem,
      transparent 24.8rem
    ),
    radial-gradient(
      26rem 26rem at 10% 6%,
      color-mix(in srgb, var(--ember) 9%, transparent),
      transparent 62%
    ),
    linear-gradient(
      to bottom,
      var(--ground-deep) 0%,
      var(--ground) 20%,
      var(--ground) 74%,
      var(--ground-deep) 100%
    );
}

.s3-wrap {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--page-x);
}

/* ---------- editorial intro ---------- */
.s3-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  column-gap: clamp(2rem, 6vw, 5.5rem);
  row-gap: 0.9rem;
  align-items: start;
  margin-bottom: clamp(2.75rem, 6vw, 4.5rem);
}

.s3-intro .eyebrow {
  grid-column: 1;
  grid-row: 1;
  margin-bottom: 0.6rem;
}

.s3-heading {
  grid-column: 1;
  grid-row: 2;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.9rem, 3.2vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
  color: var(--ink);
}

.s3-heading em {
  display: block;
  margin-top: 0.1em;
  font-style: italic;
  color: var(--ember);
}

.s3-sub {
  grid-column: 2;
  grid-row: 2;
  font-size: clamp(1rem, 0.8vw + 0.7rem, 1.14rem);
  line-height: 1.55;
  color: var(--ink);
}

.s3-body {
  grid-column: 2;
  grid-row: 3;
}

.s3-body p {
  margin-top: 0.9rem;
  font-size: 0.93rem;
  line-height: 1.68;
  color: var(--ink-soft);
}

.s3-body p:first-child {
  margin-top: 0;
}

/* framed configuration-spread stat, sits under the heading column */
.s3-range {
  grid-column: 1;
  grid-row: 3;
  justify-self: start;
  display: inline-flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.4rem;
  padding: 0.9rem 1.3rem;
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--terracotta);
  border-radius: 2px;
  background: color-mix(in srgb, var(--ground-raised) 60%, transparent);
}

.s3-range-k {
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.s3-range-v {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--ember);
}

/* ---------- expanding residence gallery ---------- */
.s3-gallery {
  display: flex;
  gap: 12px;
  height: clamp(26rem, 64vh, 40rem);
}

.res-panel {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--hairline);
  border-radius: 4px;
  background: var(--ground-deep);
  transition: flex-grow 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.res-panel.is-open {
  flex-grow: 5.5;
}

.res-photo {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.res-panel:not(.is-open):hover .res-photo,
.res-panel:not(.is-open):focus-within .res-photo {
  transform: scale(1.05);
}

.res-scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    to top,
    var(--midnight) 0%,
    color-mix(in srgb, var(--midnight) 58%, transparent) 34%,
    color-mix(in srgb, var(--midnight) 12%, transparent) 66%,
    transparent 100%
  );
  transition: background-color 0.5s ease;
}

.res-panel:not(.is-open) .res-scrim {
  background-color: color-mix(in srgb, var(--midnight) 60%, transparent);
}

/* ---------- the spine / trigger ---------- */
.res-toggle {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: clamp(1.1rem, 2vw, 1.7rem);
  text-align: left;
}

.res-num {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ember);
}

.res-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.86rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
}

.res-plus {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
  align-self: flex-start;
}

.res-plus::before,
.res-plus::after {
  content: "";
  position: absolute;
  background: var(--ember);
}

.res-plus::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1.5px;
  transform: translateY(-50%);
}

.res-plus::after {
  left: 50%;
  top: 0;
  height: 100%;
  width: 1.5px;
  transform: translateX(-50%);
}

/* open state: spine folds into a top bar, label turns horizontal */
.res-panel.is-open .res-toggle {
  inset: 0 0 auto 0;
  flex-direction: row;
  align-items: center;
  gap: 0.9rem;
  padding: clamp(1rem, 1.8vw, 1.5rem) clamp(1.4rem, 2.5vw, 2.6rem);
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--midnight) 82%, transparent),
    transparent
  );
}

.res-panel.is-open .res-label {
  writing-mode: horizontal-tb;
  transform: none;
  font-size: 0.95rem;
}

.res-panel.is-open .res-plus {
  margin-left: auto;
  transform: rotate(45deg);
  opacity: 0.55;
}

/* ---------- open-panel detail ---------- */
.res-body {
  position: absolute;
  z-index: 3;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.55rem;
  width: min(100%, 34rem);
  padding: clamp(1.5rem, 2.6vw, 2.6rem);
}

.res-body[hidden] {
  display: none;
}

.res-eyebrow {
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ember);
}

.res-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.res-copy {
  max-width: 34ch;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.res-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem 2.4rem;
  margin: 0.7rem 0 0.4rem;
}

.res-metaitem {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.res-metaitem dt {
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.res-metaitem dd {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--ink);
}

/* the pricing slot — deliberately reads as "to be filled" */
.res-price {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px dashed var(--hairline-ember);
  color: var(--ember);
}

.res-price[data-price-placeholder]::after {
  content: "Awaiting price";
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-body);
  font-size: 0.54rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border: 0;
}

.res-body .btn {
  --_pad-y: 0.75rem;
  --_pad-x: 1.5rem;
  margin-top: 0.5rem;
  font-size: 0.74rem;
}

/* ---------- private decks feature band ---------- */
.s3-deck {
  position: relative;
  margin-top: clamp(3rem, 7vw, 5rem);
  min-height: clamp(15rem, 32vw, 22rem);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border: 1px solid var(--hairline);
  border-radius: 4px;
}

.s3-deck-photo {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.s3-deck::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    100deg,
    var(--midnight) 0%,
    color-mix(in srgb, var(--midnight) 62%, transparent) 42%,
    color-mix(in srgb, var(--midnight) 8%, transparent) 78%
  );
}

.s3-deck-inner {
  position: relative;
  z-index: 2;
  padding: clamp(1.6rem, 3.4vw, 3rem);
}

.s3-deck-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ember);
}

.s3-deck-copy {
  margin-top: 0.6rem;
  max-width: 40ch;
  font-size: clamp(0.95rem, 0.6vw + 0.8rem, 1.1rem);
  line-height: 1.55;
  color: var(--ink-soft);
}

/* ---------- scroll reveal ---------- */
.s3-intro > *,
.s3-gallery .res-panel,
.s3-deck {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.9s cubic-bezier(0.16, 1, 0.3, 1),
    flex-grow 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.s3.is-in .s3-intro > *,
.s3.is-in .s3-gallery .res-panel,
.s3.is-in .s3-deck {
  opacity: 1;
  transform: none;
}

.s3.is-in .s3-heading { transition-delay: 0.05s; }
.s3.is-in .s3-sub { transition-delay: 0.1s; }
.s3.is-in .s3-body { transition-delay: 0.14s; }
.s3.is-in .s3-range { transition-delay: 0.18s; }
.s3.is-in .res-panel:nth-child(1) { transition-delay: 0.16s; }
.s3.is-in .res-panel:nth-child(2) { transition-delay: 0.24s; }
.s3.is-in .res-panel:nth-child(3) { transition-delay: 0.32s; }
.s3.is-in .s3-deck { transition-delay: 0.2s; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .s3-intro {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
  .s3-sub {
    margin-top: 0.2rem;
  }

  /* the gallery unstacks into full-width cards: image banner,
     a label bar, then the detail — all in normal flow */
  .s3-gallery {
    flex-direction: column;
    height: auto;
    gap: 16px;
  }
  .res-panel {
    flex: none;
    width: 100%;
    display: flex;
    flex-direction: column;
    transition: none;
  }
  .res-photo {
    position: static;
    order: -1;
    width: 100%;
    height: clamp(9rem, 34vw, 13rem);
  }
  .res-scrim {
    display: none;
  }
  .res-toggle {
    position: static;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    gap: 0.85rem;
    padding: 1.05rem 1.3rem;
    background: var(--ground-raised);
    border-bottom: 1px solid var(--hairline);
  }
  .res-label {
    writing-mode: horizontal-tb;
    transform: none;
    font-size: 0.95rem;
  }
  .res-plus {
    display: none;
  }
  .res-body,
  .res-body[hidden] {
    display: flex;
    position: static;
    width: 100%;
    padding: 1.5rem 1.35rem 1.7rem;
    background: var(--ground-deep);
  }

  .s3-deck {
    min-height: 0;
    flex-direction: column;
    align-items: stretch;
  }
  .s3-deck-photo {
    position: static;
    height: clamp(9rem, 42vw, 15rem);
  }
  .s3-deck::after {
    display: none;
  }
  .s3-deck-inner {
    padding: 1.6rem 1.35rem 1.9rem;
    background: var(--ground-deep);
  }
}

@media (max-width: 480px) {
  .s3-heading {
    font-size: clamp(1.6rem, 7vw, 2.1rem);
  }
  .res-meta {
    gap: 1.1rem 1.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .s3-intro > *,
  .s3-gallery .res-panel,
  .s3-deck,
  .res-photo {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .res-panel {
    transition: none !important;
  }
}