/* Design — primary layers and nested Phase 2 layer studies (the hero is the
   shared .svc-hero in services.shared.css) */
html { scroll-padding-top: calc(var(--hdr-safe) + 1rem); }
#main-content, .design-layers { scroll-margin-top: calc(var(--hdr-safe) + 1rem); }

.design-layers {
  padding: clamp(6rem, 10vw, 10rem) 0;
  background: var(--svc-ivory);
}
.design-layers-heading {
  display: grid;
  gap: .8rem;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}
.design-layers-heading h2 {
  font-size: calc(clamp(3.2rem, 6.6vw, 6.6rem) * var(--k-display));
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -.03em;
}
.design-layer-tabs {
  position: sticky;
  top: calc(var(--hdr-safe) - 1px);
  z-index: 5;
  display: flex;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-width: none;
  border-top: 1px solid var(--svc-line);
  border-bottom: 1px solid var(--svc-line);
  background: var(--svc-ivory);
}
.design-layer-tabs::-webkit-scrollbar { display: none; }
.design-layer-tabs button {
  position: relative;
  flex: 0 0 clamp(10.75rem, 46vw, 13rem);
  min-height: 4.75rem;
  padding: .85rem 1rem;
  border-right: 1px solid var(--svc-line);
  color: color-mix(in srgb, var(--svc-walnut) 64%, transparent);
  text-align: left;
  font-size: clamp(.84rem, .92vw, .95rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0;
  transition: color 400ms ease, background-color 400ms ease;
}
.design-layer-tabs button::after {
  content: "";
  position: absolute;
  right: 1rem;
  bottom: -1px;
  left: 1rem;
  height: 2px;
  background: var(--svc-copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 400ms ease;
}
.design-layer-tabs button span {
  display: block;
  margin-bottom: .2rem;
  color: var(--svc-copper);
  font-family: var(--font-display);
  font-style: normal;
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: 0;
}
.design-layer-tabs button:hover { color: var(--svc-walnut); }
.design-layer-tabs button[aria-current="location"] { color: var(--svc-walnut); background: rgba(169, 96, 40, .045); }
.design-layer-tabs button[aria-current="location"]::after { transform: scaleX(1); }
.design-layer-tabs button:focus-visible { outline-offset: -5px; }

.design-layer-scroll-layout {
  display: block;
  margin-top: clamp(2.5rem, 4vw, 4rem);
}
.design-layer-media-column { display: none; }
.design-layer-media-frame {
  position: absolute;
  inset: auto;
}
.design-layer-image {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 420ms ease, transform 420ms ease;
}
.design-layer-image.is-active {
  z-index: 1;
  opacity: 1;
  transform: translateY(0);
}
.design-layer-image img,
.design-layer-inline-visual img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  object-fit: contain;
  object-position: center;
  filter: drop-shadow(0 1.15rem 2.25rem rgba(49, 32, 29, .075));
  transition: opacity 380ms ease;
}
.design-layer-image img.is-active,
.design-layer-inline-visual img.is-active { opacity: 1; }
.design-layer-inline-visual {
  position: relative;
  aspect-ratio: 3 / 2;
  margin: 0;
  overflow: hidden;
  border: 0;
  background: transparent;
  box-shadow: none;
}
.design-layer-copy {
  scroll-margin-top: calc(var(--hdr-safe) + 6.5rem);
  padding: clamp(4.5rem, 13vw, 6.5rem) 0;
  border-top: 1px solid var(--svc-line);
  opacity: .62;
  transform: translateY(8px);
  transition: opacity 420ms ease, transform 420ms ease;
}
.design-layer-copy:last-child { border-bottom: 1px solid var(--svc-line); }
.design-layer-copy.is-active { opacity: 1; transform: translateY(0); }
.design-layer-copy > *:not(.design-layer-inline-visual) { max-width: 30rem; }
.design-layer-number {
  margin-top: clamp(2rem, 6vw, 3rem);
  color: var(--svc-copper);
  font-family: var(--font-display);
  font-style: normal;
  font-size: 1.15rem;
  letter-spacing: 0;
}
.design-layer-copy h3 {
  margin: 1rem 0 1.4rem;
  font-size: calc(clamp(2.9rem, 9vw, 4.7rem) * var(--k-display));
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -.025em;
}
.design-layer-copy > p:not(.design-layer-number) {
  color: color-mix(in srgb, var(--svc-walnut) 82%, transparent);
  font-size: clamp(.98rem, 1.25vw, 1.12rem);
  line-height: 1.75;
}
.design-sublayer-explorer {
  width: 100%;
  margin-top: clamp(1.75rem, 3vw, 2.5rem);
  padding-top: .85rem;
  border-top: 1px solid color-mix(in srgb, var(--svc-line) 72%, transparent);
}
.design-sublayer-controls {
  display: flex;
  align-items: flex-end;
  gap: clamp(1.15rem, 2.2vw, 1.8rem);
  width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-width: none;
}
.design-sublayer-controls::-webkit-scrollbar { display: none; }
.design-sublayer-control {
  position: relative;
  flex: 0 0 auto;
  min-height: 2.75rem;
  padding: .75rem 0 .8rem;
  color: color-mix(in srgb, var(--svc-walnut) 62%, transparent);
  font-size: 0.86rem;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0;
  white-space: nowrap;
  transition: color 360ms ease;
}
.design-sublayer-control::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: .28rem;
  left: 0;
  height: 1px;
  background: var(--terracotta-on-light);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 360ms ease;
}
.design-sublayer-control:hover { color: var(--svc-walnut); }
.design-sublayer-control:hover::after { transform: scaleX(.32); }
.design-sublayer-control[aria-pressed="true"] { color: var(--terracotta-on-light); }
.design-sublayer-control[aria-pressed="true"]::after { transform: scaleX(1); }
.design-sublayer-control:focus-visible { outline: 1px solid var(--svc-copper); outline-offset: 4px; }
.design-sublayer-detail {
  display: grid;
  align-content: start;
  gap: .65rem;
  min-height: 9.5rem;
  padding-top: 1.35rem;
}
.design-sublayer-detail h4 {
  color: var(--svc-copper);
  font-family: var(--font-display);
  font-style: normal;
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: 0;
}
.design-sublayer-text {
  color: var(--svc-walnut);
  font-size: clamp(.88rem, 1vw, .98rem);
  line-height: 1.55;
}
.design-sublayer-meaning {
  color: color-mix(in srgb, var(--svc-walnut) 66%, transparent);
  font-size: clamp(.72rem, .78vw, .78rem);
  line-height: 1.55;
}

/* The closing section and its "next service" row use the shared
   .svc-closing / .next-service pattern in services.shared.css (client
   feedback 2026-10-01: one closing format on all four service pages). */

@media (min-width: 900px) {
  .design-layer-tabs { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .design-layer-tabs { display: grid; overflow: visible; }
  .design-layer-tabs button { min-width: 0; padding-inline: clamp(.75rem, 1.6vw, 1.5rem); }
  .design-layer-tabs button:last-child { border-right: 0; }
  .design-layer-tabs button::after { right: clamp(.75rem, 1.6vw, 1.5rem); left: clamp(.75rem, 1.6vw, 1.5rem); }
  .design-layer-scroll-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.46fr) minmax(19rem, .72fr);
    gap: clamp(3rem, 7vw, 7rem);
    align-items: start;
  }
  .design-layer-media-column { position: sticky; top: calc(var(--hdr-safe) + 7rem); display: block; align-self: start; min-width: 0; }
  .design-layer-media-frame {
    position: relative;
    inset: auto;
    height: min(35rem, calc(100vh - var(--hdr-safe) - 8rem));
    height: min(35rem, calc(100svh - var(--hdr-safe) - 8rem));
    border: 0;
    background: transparent;
    box-shadow: none;
  }
  .design-layer-image { inset: 0; }
  .design-layer-copy-stack { min-width: 0; padding-bottom: min(14rem, 29svh); }
  .design-layer-inline-visual { display: none; }
  .design-layer-copy { min-height: clamp(26rem, 58vh, 34rem); padding: 4rem 0; display: flex; flex-direction: column; justify-content: center; scroll-margin-top: 0; }
  .design-layer-copy > * { max-width: 30rem; }
  .design-layer-number { margin-top: 0; }
  .design-layer-copy h3 { font-size: calc(clamp(2.8rem, 4.8vw, 5.3rem) * var(--k-display)); }
  .design-sublayer-controls { flex-wrap: wrap; overflow: visible; }
}

@media (max-width: 899px) {
  .design-sublayer-explorer { max-width: 100%; }
  /* Mobile pass 2026-10-01. A tab tap lands the layer just under the pinned
     tab bar (html's scroll-padding already clears the header, so this is
     only the bar), not 130px further down. */
  .design-layer-copy { scroll-margin-top: 4.5rem; }
  /* Both sideways strips carry an edge fade where more is hidden. */
  .design-layer-tabs,
  .design-sublayer-controls {
    --fade-l: 0px;
    --fade-r: 2.25rem;
    -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 var(--fade-l), #000 calc(100% - var(--fade-r)), transparent 100%);
    mask-image: linear-gradient(90deg, transparent 0, #000 var(--fade-l), #000 calc(100% - var(--fade-r)), transparent 100%);
  }
  .design-layer-tabs.is-scrolled,
  .design-sublayer-controls.is-scrolled { --fade-l: 2.25rem; }
  .design-layer-tabs.is-end,
  .design-sublayer-controls.is-end { --fade-r: 0px; }
  /* Legibility on phones: the tracked labels no smaller than about 11px. */
  .design-layer-tabs button { font-size: .82rem; }
  .design-layer-tabs button span { font-size: 1.05rem; }
  .design-layer-number { font-size: 1.05rem; }
  .design-sublayer-controls { gap: 1.1rem; }
  .design-sublayer-control { min-width: 2.75rem; font-size: .8rem; text-align: center; }
  .design-sublayer-detail h4 { font-size: 1.2rem; }
  .design-sublayer-meaning { font-size: .82rem; }
}

@media (max-width: 560px) {
  .design-layers { padding-block: 6rem; }
  .design-layer-tabs button { min-height: 5rem; }
  .design-layer-copy > p:not(.design-layer-number) { line-height: 1.65; }
}

@media (prefers-reduced-motion: reduce) {
  .design-layer-image, .design-layer-image img, .design-layer-inline-visual img, .design-layer-copy, .design-layer-tabs button, .design-layer-tabs button::after, .design-sublayer-control, .design-sublayer-control::after { transition: none; }
}

/* Touch tablets keep the desktop layout; their sub-layer controls still
   need a 44px-wide target. */
@media (hover: none) {
  .design-sublayer-control { min-width: 2.75rem; text-align: center; }
}


/* Hero render (client, 2026-10-02): the Neo Classical living room is wider
   than the shared 3:2 frame, so on this page the frame takes the image's own
   proportion and shows it whole, nothing cropped. */
.svc-hero__media > img.design-hero-img { aspect-ratio: 1536 / 896; }