/* Fuller interface tile grid — scoped for marketing landing (from mock v5) */

.interface-grid {
  overflow: visible;
  --paper: #fbfcf8;
  --surface: #e8ebe6;
  --ink: #202722;
  --muted: #69736c;
  --lime: #e2f88b;
  --lime-bright: #d7f66e;
  --charcoal: #181e1a;
  --radius: 22px;
  --gap: 42px;
  --font: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;

  --neu-dark: #c0c6bb;
  --neu-light: #ffffff;
  --shadow-convex:
    8px 8px 16px var(--neu-dark),
    -8px -8px 16px var(--neu-light);
  --shadow-concave:
    inset 6px 6px 12px var(--neu-dark),
    inset -6px -6px 12px var(--neu-light);
  --shadow-press:
    inset 8px 8px 14px var(--neu-dark),
    inset -4px -4px 10px var(--neu-light);

  --orange-a: 245, 225, 210;
  --orange-b: 232, 196, 168;
  --orange-hot: 236, 168, 120;
  --orange-line: 210, 140, 88;
  --blue-a: 220, 231, 240;
  --blue-b: 185, 204, 224;
  --blue-hot: 140, 176, 214;
  --blue-line: 96, 140, 186;
  --green-a: 229, 238, 217;
  --green-b: 197, 214, 176;
  --green-hot: 154, 186, 120;
  --green-line: 110, 150, 78;

  --asset-ops: #7a5e48;
  --dev-ops: #4d6478;
  --occ-ops: #5a6d48;

  --press: 380ms;
  --rise: 560ms;
  --morph: 520ms;
  --fill: 460ms;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.3, 0.64, 1);

  --strip-visible: 6;
  --edge-zone: 88px;
  --shadow-gutter: 40px;
  --strip-inset: 56px;
  /* shell surface */
  position: relative;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.35) 0%, transparent 42%, rgba(0,0,0,0.03) 100%),
    linear-gradient(90deg, #eef1ec 0%, #e4e8e2 48%, #eef1ec 100%);
  background-color: var(--surface);
  padding: 8px 0 72px;
}

.interface-grid .igrid-header{
  max-width: 1240px;
  margin: 0 auto;
  padding: 36px 28px 16px;
  transition: opacity var(--morph) var(--ease), transform var(--morph) var(--ease);
}
.interface-grid.is-detail .igrid-header{
  opacity: 0.28;
  transform: translateY(-4px);
  pointer-events: none;
}
.interface-grid .eyebrow{
  margin: 0 0 10px;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.interface-grid .igrid-header h1{
  margin: 0 0 8px;
  font-size: clamp(1.75rem, 3.2vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 1.08;
}
.interface-grid .lede{
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  font-weight: 500;
}
.interface-grid .lede-sub{
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.interface-grid .stage{
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  padding: 8px 28px 72px;
  min-height: 70vh;
}
.interface-grid.is-detail .stage{
  display: flex;
  flex-direction: column;
  gap: 18px;
  /* Full-bleed to viewport: overview can sit ~0.5" from screen left */
  max-width: none;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: 0;
  padding: 4px 24px 64px 48px; /* ~0.5" left, modest right */
  box-sizing: border-box;
}
.interface-grid .backdrop{
  position: absolute;
  inset: 0;
  background: rgba(32, 39, 34, 0);
  pointer-events: none;
  z-index: 1;
  transition: background var(--morph) var(--ease);
}
.interface-grid.is-detail .backdrop{
  background: transparent;
  pointer-events: auto;
  cursor: pointer;
}
/* ——— Strip ——— */
.interface-grid .strip-wrap{
  position: relative;
  z-index: 3; /* above detail/spotlight so strip tiles never sit under dim */
}
.interface-grid .tile-rail{
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap);
}
.interface-grid .strip-edge{ display: none; }
.interface-grid.is-detail .strip-wrap{
  overflow: visible;
  margin: 0;
  padding: 0;
}
.interface-grid.is-detail .strip-scroller{
  overflow-x: auto;
  overflow-y: hidden;
  padding: var(--shadow-gutter) calc(var(--shadow-gutter) + 8px);
  margin: 0;
  scroll-behavior: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  background: transparent;
}
.interface-grid.is-detail .strip-scroller::-webkit-scrollbar{
  display: none;
  width: 0;
  height: 0;
}
.interface-grid.is-detail .tile-rail{
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: 24px;
  width: max-content;
  min-width: 100%;
  padding: 0;
}
/* Fill mode: N tiles share full strip width — no clones / no mirror */
.interface-grid.is-detail.is-strip-fill .tile-rail{
  width: 100%;
  max-width: 100%;
  min-width: 100%;
}
.interface-grid.is-detail .tile-rail::before, .interface-grid.is-detail .tile-rail::after{
  content: "";
  flex: 0 0 12px;
}
.interface-grid.is-detail.is-strip-fill .tile-rail::before,
.interface-grid.is-detail.is-strip-fill .tile-rail::after{
  display: none;
  content: none;
  flex: 0 0 0;
}
/* Scrollable All-interfaces strip (no clones): fixed min tile width */
.interface-grid.is-detail:not(.is-strip-fill) .tile-rail > .tile{
  flex: 0 0 calc((min(1320px, 100vw) - (var(--strip-inset) * 2) - (var(--shadow-gutter) * 2) - ((var(--strip-visible) - 1) * 24px)) / var(--strip-visible));
  width: calc((min(1320px, 100vw) - (var(--strip-inset) * 2) - (var(--shadow-gutter) * 2) - ((var(--strip-visible) - 1) * 24px)) / var(--strip-visible));
  min-width: 148px;
}
/* Suite strips (3/6/7…): each tile = (100% − gaps) / N */
.interface-grid.is-detail.is-strip-fill .tile-rail > .tile{
  flex: 1 1 0;
  width: auto;
  min-width: 0;
  max-width: none;
}
.interface-grid.is-detail .strip-edge{
  display: block;
  position: absolute;
  top: var(--shadow-gutter);
  bottom: var(--shadow-gutter);
  width: var(--edge-zone);
  z-index: 4;
  pointer-events: auto;
}
.interface-grid.is-detail .strip-edge--left{
  left: 0;
  /* Fade into empty stage — no white/paper wall */
  background: linear-gradient(90deg, rgba(232,235,230,0.0), transparent);
}
.interface-grid.is-detail .strip-edge--right{
  right: 0;
  background: linear-gradient(270deg, rgba(232,235,230,0.0), transparent);
}
/* ——— Tiles: outline at rest → suite fill when selected ——— */
.interface-grid .tile{
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: stretch;
  gap: 0;
  min-height: 176px;
  padding: 14px 12px 12px;
  border-radius: var(--radius);
  border: 2.5px solid rgba(var(--g-line), 0.55);
  color: var(--ink);
  cursor: pointer;
  background: transparent;
  isolation: isolate;
  overflow: hidden;
  box-shadow: var(--shadow-convex);
  transform: translateY(0) scale(1);
  transform-origin: center center;
  will-change: transform;
  transition:
    box-shadow var(--rise) var(--ease-soft),
    transform var(--rise) var(--ease-soft),
    filter var(--rise) var(--ease-soft),
    border-color var(--rise) var(--ease-soft),
    background-color var(--rise) var(--ease-soft),
    min-height var(--morph) var(--ease),
    padding var(--morph) var(--ease),
    gap var(--morph) var(--ease);
  -webkit-tap-highlight-color: transparent;
  view-transition-name: var(--vt-name, none);
}
/* Paper / aluminum interior — light, not a heavy suite wash */
.interface-grid .tile::before{
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: -1;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.28), rgba(232, 235, 230, 0.12)),
    linear-gradient(145deg, rgba(var(--g-a), 0.14), rgba(var(--g-b), 0.08));
  backdrop-filter: blur(10px) saturate(1.05);
  -webkit-backdrop-filter: blur(10px) saturate(1.05);
  opacity: 1;
  transition:
    background var(--fill) var(--ease-soft),
    opacity var(--fill) var(--ease-soft);
}
/* Suite fill layer — rises on select */
.interface-grid .tile::after{
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: -1;
  background: linear-gradient(
    145deg,
    rgba(var(--g-hot), 0.0),
    rgba(var(--g-b), 0.0)
  );
  opacity: 0;
  transform: scale(0.92);
  transition:
    background var(--fill) var(--ease-soft),
    opacity var(--fill) var(--ease-soft),
    transform var(--fill) var(--ease-soft);
  pointer-events: none;
}
.interface-grid .tile:hover, .interface-grid .tile:focus-visible, .interface-grid .tile.is-hover{
  box-shadow:
    0 2px 10px rgba(32, 39, 34, 0.10),
    0 1px 2px rgba(32, 39, 34, 0.06);
  transform: translateY(0) scale(1.004);
  outline: none;
  border-color: transparent;
  transition:
    box-shadow 720ms var(--ease-soft),
    transform 720ms var(--ease-soft),
    filter 720ms var(--ease-soft),
    border-color 720ms var(--ease-soft);
}
.interface-grid .tile:hover::before, .interface-grid .tile:focus-visible::before, .interface-grid .tile.is-hover::before{
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.32), rgba(232, 235, 230, 0.14)),
    linear-gradient(145deg, rgba(var(--g-a), 0.18), rgba(var(--g-b), 0.10));
}
.interface-grid .tile:hover::after, .interface-grid .tile:focus-visible::after, .interface-grid .tile.is-hover::after{
  opacity: 0.10;
  transform: scale(0.995);
  background: linear-gradient(
    145deg,
    rgba(var(--g-hot), 0.28),
    rgba(var(--g-b), 0.12)
  );
}
/* Selected / engaged: suite-color FILL */
.interface-grid .tile.is-selected{
  border-color: transparent;
  box-shadow:
    0 3px 12px rgba(32, 39, 34, 0.12),
    0 1px 3px rgba(32, 39, 34, 0.06);
  transform: translateY(0) scale(1.002);
  filter: drop-shadow(0 0 4px rgba(var(--g-hot), 0.14));
  transition:
    box-shadow var(--fill) var(--ease-soft),
    transform var(--fill) var(--ease-soft),
    filter var(--fill) var(--ease-soft),
    border-color var(--fill) var(--ease-soft);
}
.interface-grid .tile.is-selected::before{
  background: linear-gradient(
    145deg,
    rgba(var(--g-a), 0.42),
    rgba(var(--g-b), 0.32)
  );
}
.interface-grid .tile.is-selected::after{
  opacity: 0.36;
  transform: scale(1);
  background: linear-gradient(
    145deg,
    rgba(var(--g-hot), 0.24),
    rgba(var(--g-b), 0.16)
  );
}
.interface-grid .tile:active{
  box-shadow:
    0 1px 5px rgba(32, 39, 34, 0.10),
    0 1px 2px rgba(32, 39, 34, 0.05);
  transform: translateY(0) scale(0.998);
  border-color: transparent;
  transition-duration: 280ms;
}
.interface-grid .tile.is-flipping{
  /* During FLIP, let JS drive transform; mute conflicting transitions */
  transition:
    box-shadow var(--fill) var(--ease-soft),
    border-color var(--fill) var(--ease-soft),
    background-color var(--fill) var(--ease-soft),
    filter var(--fill) var(--ease-soft) !important;
  z-index: 6;
  pointer-events: none;
}
.interface-grid .tile--creet{
  --g-a: var(--orange-a);
  --g-b: var(--orange-b);
  --g-hot: var(--orange-hot);
  --g-line: var(--orange-line);
}
.interface-grid .tile--creet .tile-ops{ color: var(--asset-ops); }
.interface-grid .tile--framework{
  --g-a: var(--blue-a);
  --g-b: var(--blue-b);
  --g-hot: var(--blue-hot);
  --g-line: var(--blue-line);
}
.interface-grid .tile--framework .tile-ops{ color: var(--dev-ops); }
.interface-grid .tile--hover{
  --g-a: var(--green-a);
  --g-b: var(--green-b);
  --g-hot: var(--green-hot);
  --g-line: var(--green-line);
}
.interface-grid .tile--hover .tile-ops{ color: var(--occ-ops); }





.interface-grid.is-detail .tile{
  min-height: 136px;
  padding: 8px 6px 8px;
  gap: 0;
  border-radius: 16px;
  overflow: visible;
  border-width: 2px;
  justify-content: stretch;
  /* Strip mode: drop heavy convex fill — keep thin suite outline + soft glass */
  box-shadow:
    0 1px 2px rgba(32, 39, 34, 0.06),
    0 8px 20px rgba(32, 39, 34, 0.06);
}
.interface-grid.is-detail .tile::before{
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.22), rgba(232, 235, 230, 0.08)),
    linear-gradient(145deg, rgba(var(--g-a), 0.10), rgba(var(--g-b), 0.06));
  backdrop-filter: blur(8px) saturate(1.02);
  -webkit-backdrop-filter: blur(8px) saturate(1.02);
}
.interface-grid.is-detail .tile::after{
  overflow: hidden;
}
.interface-grid.is-detail .tile.is-selected,
.interface-grid.is-detail .tile:hover,
.interface-grid.is-detail .tile:focus-visible,
.interface-grid.is-detail .tile.is-hover{
  box-shadow:
    0 2px 10px rgba(32, 39, 34, 0.10),
    0 1px 2px rgba(32, 39, 34, 0.06);
}






/* Dim non-selected strip tiles; selected stays full opacity */
.interface-grid.is-detail .tile:not(.is-selected){
  opacity: 0.38;
  transition:
    opacity 420ms var(--ease-soft),
    box-shadow var(--rise) var(--ease-soft),
    transform var(--rise) var(--ease-soft),
    filter var(--rise) var(--ease-soft),
    border-color var(--fill) var(--ease-soft),
    background-color var(--fill) var(--ease-soft),
    min-height var(--morph) var(--ease),
    padding var(--morph) var(--ease),
    gap var(--morph) var(--ease);
}
.interface-grid.is-detail .tile.is-selected{
  opacity: 1;
}
/* Periodic-table cell layout — gallery + strip share the same proportions */
.interface-grid .tile-face{
  display: block;
  height: 100%;
  min-height: inherit;
  position: relative;
  z-index: 1;
}
/* Atomic-number analogue: tiny suite label, top */
.interface-grid .tile-suite{
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  margin: 0;
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0.85;
  text-align: center;
  line-height: 1.2;
  pointer-events: none;
}
/* Secondary ops line — small, does not compete with symbol */
.interface-grid .tile-ops{
  position: absolute;
  top: 14px;
  left: 4px;
  right: 4px;
  margin: 0;
  font-size: 10px;
  font-weight: 550;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-align: center;
  opacity: 0.78;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  pointer-events: none;
}
/* Element symbol = interface code — dominant, dead center */
.interface-grid .tile-code{
  position: absolute;
  left: 50%;
  top: 48%;
  transform: translate(-50%, -50%);
  margin: 0;
  font-size: clamp(36px, 5.8vw, 56px);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 0.92;
  text-align: center;
  white-space: nowrap;
  max-width: 96%;
  /* Owns ~35–50% of cell visual weight */
}
/* Element name under symbol — bottom of cell */
.interface-grid .tile-name,
.interface-grid .tile-title{
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: calc(100% - 4px);
  margin: 0;
  font-size: 12px;
  font-weight: 550;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: #3a443c;
  text-align: center;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
/* Strip / fill-width: same PT geometry; scale symbol to tile */
.interface-grid.is-detail .tile-face{
  display: block;
}
.interface-grid.is-detail .tile .tile-suite{
  font-size: 7px;
  letter-spacing: 0.12em;
  top: 0;
}
.interface-grid.is-detail .tile .tile-ops{
  top: 12px;
  font-size: 8px;
  left: 2px;
  right: 2px;
}
.interface-grid.is-detail .tile .tile-code{
  top: 46%;
  font-size: clamp(28px, 4.2vw, 48px);
  font-weight: 700;
  letter-spacing: -0.055em;
}
.interface-grid.is-detail .tile .tile-name,
.interface-grid.is-detail .tile .tile-title{
  bottom: 0;
  top: auto;
  font-size: 10px;
  -webkit-line-clamp: 2;
}

/* ——— Detail ——— */
.interface-grid .detail{
  display: none;
  position: relative;
  z-index: 2;
  flex-direction: column;
  gap: 10px;
  /* Align with strip: same horizontal bounds as carousel */
  max-width: none;
  width: 100%;
  margin: 0;
  animation: detail-in var(--morph) var(--ease-out) both;
}
.interface-grid .detail[hidden]{ display: none !important; }
.interface-grid.is-detail .detail:not([hidden]){
  display: flex;
  flex: 1;
  min-height: 0;
}
@keyframes detail-in {
from{ opacity: 0; transform: translateY(10px); }
to{ opacity: 1; transform: translateY(0); }
}
.interface-grid .detail-close{
  position: relative;
  top: auto;
  right: auto;
  z-index: 5;
  padding: 8px 14px;
  border: none;
  border-radius: 999px;
  background: rgba(255,255,255,0.35);
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: color var(--press) var(--ease), background var(--press) var(--ease);
}
.interface-grid .detail-close:hover, .interface-grid .detail-close:focus-visible{
  color: var(--ink);
  background: rgba(255,255,255,0.55);
  outline: none;
}
.interface-grid .detail-main{
  display: grid;
  /* Overview dominates; features readable but capped (~22% / ≤300px). */
  grid-template-columns: minmax(0, 1fr) minmax(260px, min(22%, 300px));
  gap: 16px;
  margin-inline-start: 0; /* no carousel-gutter inset — sit near viewport left */
  min-width: 0;
  align-items: start; /* overview top aligns with features identity title */
  flex: 1;
  min-height: 0;
}
.interface-grid .overview{
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 100%;
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
}
/* Frameless product UI — fills 75% width; contain so hotspot % maps 1:1.
   Transparent stage: letterbox matches aluminum page --surface (no black). */
.interface-grid .spotlight-stage{
  position: relative;
  width: 100%;
  flex: 0 1 auto;
  min-height: 0;
  border-radius: 0;
  overflow: hidden; /* clip mask to stage; JS further clips to browser-chrome frame */
  background: transparent;
  box-shadow: none;
  border: none;
  outline: none;
  padding: 0;
}
.interface-grid .overview-img{
  display: block;
  width: 100%;
  height: auto;
  max-height: min(94vh, 1240px); /* larger overview — reverse v9 shrink */
  object-fit: contain;
  object-position: top center;
  border-radius: 0;
  box-shadow: none;
  border: none;
  background: transparent;
}
/* Real hotspot spotlight — opacity dim wash + clear hole; no blur; no focus-window chrome */
.interface-grid .spotlight-mask{
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
  overflow: hidden; /* JS repositions to overview opaque/browser-chrome display frame */
}
.interface-grid .spotlight-mask[hidden]{ display: none !important; }
.interface-grid .spotlight-dim{
  position: absolute;
  inset: 0;
  /* ~50% surface wash (not ink). Hole stays clear via SVG luminance mask. NO blur. */
  background: rgba(232, 235, 230, 0.5);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  filter: none;
  opacity: 0;
  /* Slow crossfade: enter ~1650ms ease-out, leave ~1650ms ease-in (via JS class) */
  transition: opacity 1650ms cubic-bezier(0.16, 1, 0.3, 1);
}
.interface-grid .spotlight-dim.is-leaving{
  transition: opacity 1650ms cubic-bezier(0.4, 0, 0.2, 1);
}
.interface-grid .spotlight-box{
  position: absolute;
  /* Geometry-only — NO colored focus-window border / glow */
  border: none !important;
  border-radius: 12px;
  box-shadow: none !important;
  background: transparent !important;
  outline: none !important;
  opacity: 0;
  pointer-events: none;
  transition:
    left 1650ms cubic-bezier(0.22, 0.61, 0.36, 1),
    top 1650ms cubic-bezier(0.22, 0.61, 0.36, 1),
    width 1650ms cubic-bezier(0.22, 0.61, 0.36, 1),
    height 1650ms cubic-bezier(0.22, 0.61, 0.36, 1);
}
/* Suite variants must NOT reintroduce border/glow */
.interface-grid .spotlight-box.suite-creet,
.interface-grid .spotlight-box.suite-framework,
.interface-grid .spotlight-box.suite-hover{
  border: none !important;
  box-shadow: none !important;
  background: transparent !important;
}
/* Under-image identity de-emphasized — primary caption lives above features */
.interface-grid .overview-identity{
  display: none;
  margin: 0;
  padding: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--muted);
  line-height: 1.35;
}
.interface-grid .overview-identity[hidden]{ display: none !important; }
.interface-grid .overview-identity strong{
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.02em;
}
.interface-grid .overview-identity .oid-suite{
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
/* Invisible hotspot hit-targets over overview image content box */
.interface-grid .hotspot-layer{
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}
.interface-grid .hotspot-hit{
  position: absolute;
  border: none;
  padding: 0;
  margin: 0;
  background: transparent;
  cursor: pointer;
  pointer-events: auto;
  border-radius: 8px;
  outline: none;
  /* Subtle rest cue — almost invisible until hover/active */
  box-shadow: none;
  transition: background 180ms var(--ease), box-shadow 180ms var(--ease);
}
.interface-grid .hotspot-hit:hover, .interface-grid .hotspot-hit:focus-visible{
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}
.interface-grid .hotspot-hit.is-active{
  background: transparent;
  box-shadow: none; /* suite outline comes from .spotlight-box */
}
/* Features column — compact titles; description only when focused (no huge card) */
.interface-grid .features{
  display: flex;
  flex-direction: column;
  gap: 2px;
  height: 100%;
  min-height: 0;
  padding: 48px 0 0; /* ~0.5" down — title + feature seats */
  overflow: auto;
  align-self: start;
  min-width: 0;
}
/* Identity caption above feature seats — top-aligned with overview window; dominant title */
.interface-grid .features-identity{
  margin: 0 0 12px;
  padding: 0 4px 12px;
  min-width: 0;
  border-bottom: 1px solid rgba(32, 39, 34, 0.12);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  line-height: 1.1;
}
.interface-grid .features-identity[hidden]{ display: none !important; }
.interface-grid .features-identity .fid-code{
  font-size: clamp(28px, 2.8vw, 40px);
  font-weight: 650;
  letter-spacing: -0.05em;
  color: var(--ink);
  line-height: 1.05;
}
.interface-grid .features-identity .fid-sep{
  color: var(--muted);
  font-weight: 500;
  font-size: clamp(22px, 2.2vw, 32px);
  line-height: 1;
}
.interface-grid .features-identity .fid-name{
  font-size: clamp(22px, 2.2vw, 34px);
  font-weight: 600;
  letter-spacing: -0.035em;
  color: var(--ink);
  line-height: 1.15;
  min-width: 0;
  overflow-wrap: anywhere;
}
.interface-grid .feature-seat{
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  border: none;
  text-align: left;
  padding: 8px 10px;
  border-radius: 10px;
  background: transparent;
  box-shadow: none;
  cursor: pointer;
  color: inherit;
  font: inherit;
  overflow: visible;
  /* Same slow ease as spotlight crossfade (~1.65s) — not a 180ms snap */
  transition:
    background 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    color 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    padding 1650ms cubic-bezier(0.16, 1, 0.3, 1);
}
.interface-grid .feature-seat:hover, .interface-grid .feature-seat:focus-visible, .interface-grid .feature-seat.is-active{
  background: transparent;
  outline: none;
}
.interface-grid .feature-seat.is-pinned{
  background: transparent;
}
.interface-grid .feature-seat.is-active{
  padding-bottom: 10px;
}
.interface-grid .feature-title{
  margin: 0;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--muted);
  transition:
    color 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    font-weight 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    font-size 1650ms cubic-bezier(0.16, 1, 0.3, 1);
}
.interface-grid .feature-seat:hover .feature-title, .interface-grid .feature-seat:focus-visible .feature-title, .interface-grid .feature-seat.is-active .feature-title{
  color: var(--ink);
  font-weight: 650;
  font-size: 13px;
}
/* Description only — no card chrome, no flex-fill empty box.
   Open/close uses the same ~1.65s ease as the spotlight crossfade (grid-template-rows, not display snap). */
.interface-grid .feature-desc{
  display: grid;
  grid-template-rows: 0fr;
  margin: 0;
  opacity: 0;
  font-size: 12px;
  color: #3f4a42;
  line-height: 1.5;
  max-width: 36ch;
  transition:
    grid-template-rows 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    opacity 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    margin 1650ms cubic-bezier(0.16, 1, 0.3, 1);
}
.interface-grid .feature-desc > span{
  overflow: hidden;
  min-height: 0;
}
.interface-grid .feature-seat.is-active .feature-desc{
  grid-template-rows: 1fr;
  opacity: 1;
  margin: 6px 0 2px;
}
.interface-grid .toast{
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--charcoal);
  color: #eef4e4;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
  z-index: 50;
}
.interface-grid .toast.is-visible{
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.interface-grid ::view-transition-old(root), .interface-grid ::view-transition-new(root){
  animation-duration: 0.45s;
}
@media (max-width: 980px) {
.interface-grid :root{ --gap: 30px; --strip-visible: 4; --strip-inset: 24px; --shadow-gutter: 24px; }
.interface-grid .tile-rail{ grid-template-columns: repeat(2, 1fr); }
.interface-grid .detail-main{ grid-template-columns: 1fr; min-height: 0; }
.interface-grid .features{ min-height: 0; }
.interface-grid .overview-img{ max-height: 68vh; }
}
@media (max-width: 520px) {
.interface-grid :root{ --gap: 24px; --strip-visible: 2.4; --strip-inset: 16px; }
.interface-grid .igrid-header{ padding: 28px 16px 12px; }
.interface-grid .stage{ padding: 0 16px 56px; }
.interface-grid .tile-rail{ grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
.interface-grid .tile, .interface-grid .tile:hover, .interface-grid .feature-seat, .interface-grid .feature-title, .interface-grid .feature-desc, .interface-grid .igrid-header, .interface-grid .backdrop, .interface-grid .spotlight-dim, .interface-grid .spotlight-box{
    transition-duration: 80ms !important;
  }
.interface-grid .tile.is-flipping{ transition: none !important; }
}

/* Live site shell */
.interfaces-section{padding:0;background:var(--paper,#fbfcf8);border-top:1px solid var(--line,#dde3da)}
.interfaces-section .interfaces-intro{padding:56px 0 12px}
.interfaces-section .interfaces-intro h2{font-size:clamp(36px,4vw,56px);letter-spacing:-.055em;line-height:1.08;margin:0 0 12px}
.interfaces-section .interfaces-intro p{color:var(--muted,#69736c);max-width:560px;font-size:15px;margin:0}
.interface-grid .suite-filters{display:flex;flex-wrap:wrap;gap:8px;padding:0 0 20px;max-width:1240px;margin:0 auto;width:min(1240px,calc(100% - 96px));position:relative;z-index:5}
.interface-grid .suite-filter{min-height:40px;padding:8px 14px;border-radius:999px;border:1px solid #d5dec9;background:#fbfcf8;color:#5f6d58;font-size:12px;font-weight:600;letter-spacing:-.01em;cursor:pointer}
.interface-grid .suite-filter[aria-pressed="true"]{background:var(--lime,#e2f88b);border-color:#cfe691;color:#2a3a1c}
.interface-grid .suite-filter:hover{background:#eef3e5}
.interface-grid .iface-slug-anchors{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.interface-grid .stage{max-width:1240px;margin:0 auto;width:min(1240px,calc(100% - 96px))}
.interface-grid.is-detail .stage{max-width:none;width:100vw;margin-left:calc(50% - 50vw);margin-right:0}
.suite-chapter-only{padding:0;background:var(--paper,#fbfcf8);border-top:1px solid var(--line,#dde3da)}
.suite-chapter-only .suite-lead{padding:56px 0 48px}
.suite-chapter-only .suite-lead .section-pill{display:inline-flex;margin-bottom:8px}
.suite-chapter-only .suite-lead .workspace-audience{color:#52654b;font-size:14px;margin:16px 0 0}
.suite-chapter-only .suite-lead-copy{color:#69736c;max-width:540px;font-size:16px;line-height:1.55;margin-top:14px}
.suite-chapter-only .suite-story{margin-top:20px;font-size:13px;color:#78836e}
.suite-chapter-only .suite-story>summary{display:flex;align-items:center;justify-content:space-between;min-height:44px;cursor:pointer;list-style:none}
.suite-chapter-only .suite-story-copy{padding-top:12px;columns:2;column-gap:40px;font-size:13px;line-height:1.65}
.suite-chapter-only .suite-story-copy p{break-inside:avoid;margin-bottom:16px}
.suite-chapter-only .paper-next{display:inline-flex;align-items:center;gap:28px;min-height:48px;border-bottom:1px solid #15221855;margin-top:18px;font-size:14px;color:var(--ink,#152218)}
.suite-chapter-only .paper-next:hover{color:#52683d;border-color:#52683d}
@media(max-width:700px){.interface-grid .suite-filters,.interface-grid .stage{width:calc(100% - 36px)}.interface-grid.is-detail .stage{width:100vw;margin-left:calc(50% - 50vw);padding:4px 16px 56px 24px}.suite-chapter-only .suite-story-copy{columns:1}}
html[data-theme="dark"] .interfaces-section{background:var(--paper)}
html[data-theme="dark"] .interface-grid{--surface:#1a2420;--neu-dark:#0f1613;--neu-light:#2a3832;--ink:#eef4e8;--muted:#b7c6b0;--paper:#1f2b25;color:var(--ink);background:linear-gradient(180deg,rgba(255,255,255,.03) 0%,transparent 42%,rgba(0,0,0,.18) 100%),linear-gradient(90deg,#1a2420 0%,#15201c 48%,#1a2420 100%);background-color:var(--surface)}
html[data-theme="dark"] .interface-grid .suite-filter{background:#17241a;border-color:#3b5032;color:#cadbbd}
html[data-theme="dark"] .interface-grid .suite-filter[aria-pressed="true"]{background:#deef99;color:#1c2c12;border-color:#c6dc85}
html[data-theme="dark"] .suite-chapter-only .workspace-audience,
html[data-theme="dark"] .suite-chapter-only .suite-story,
html[data-theme="dark"] .suite-chapter-only .suite-story-copy p{color:#c0ceb8}

/* Dark mode strip / glass / spotlight — no chalky light edges */
html[data-theme="dark"] .interface-grid.is-detail .strip-edge--left{
  background: linear-gradient(90deg, rgba(15, 22, 19, 0.0), transparent);
}
html[data-theme="dark"] .interface-grid.is-detail .strip-edge--right{
  background: linear-gradient(270deg, rgba(15, 22, 19, 0.0), transparent);
}
html[data-theme="dark"] .interface-grid.is-detail .backdrop{
  background: transparent;
}
html[data-theme="dark"] .interface-grid .tile{
  box-shadow:
    6px 6px 14px rgba(8, 12, 10, 0.55),
    -4px -4px 12px rgba(42, 56, 50, 0.18);
}
html[data-theme="dark"] .interface-grid .tile::before{
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.04), rgba(0, 0, 0, 0.12)),
    linear-gradient(145deg, rgba(var(--g-a), 0.10), rgba(var(--g-b), 0.06));
}
html[data-theme="dark"] .interface-grid.is-detail .tile{
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.35),
    0 8px 20px rgba(0, 0, 0, 0.28);
}
html[data-theme="dark"] .interface-grid.is-detail .tile::before{
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(0, 0, 0, 0.18)),
    linear-gradient(145deg, rgba(var(--g-a), 0.12), rgba(var(--g-b), 0.08));
}
html[data-theme="dark"] .interface-grid .spotlight-dim{
  background: rgba(26, 36, 32, 0.5);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  filter: none;
}
html[data-theme="dark"] .interface-grid .feature-desc{ color: #c5d2c0; }
html[data-theme="dark"] .interface-grid .tile-suite,
html[data-theme="dark"] .interface-grid .tile-ops,
html[data-theme="dark"] .interface-grid .tile-name,
html[data-theme="dark"] .interface-grid .tile-title,
html[data-theme="dark"] .interface-grid .tile-code{ color: var(--ink); }

html[data-theme="dark"] .interface-grid .features-identity{
  border-bottom-color: rgba(238, 244, 232, 0.14);
}
html[data-theme="dark"] .interface-grid .features-identity .fid-code,
html[data-theme="dark"] .interface-grid .features-identity .fid-name{
  color: var(--ink);
}


/* === valentine-blend theater bump v11 === */
/* Conductor-scale overview when a tile is open; thin strip; dim peers; blur-only spotlight */
.interface-grid.is-detail .strip-wrap{
  max-height: 112px;
  margin-bottom: 8px;
}
.interface-grid.is-detail .tile-rail > .tile{
  min-height: 96px;
}
.interface-grid.is-detail .tile:not(.is-selected){
  opacity: 0.38;
  filter: none;
}
.interface-grid.is-detail .detail-main{
  grid-template-columns: minmax(0, 1fr) minmax(240px, min(20%, 280px));
  gap: 20px;
}
.interface-grid .overview-img{
  max-height: min(96vh, 1320px);
}
.interface-grid .features-identity .fid-code{
  font-size: clamp(32px, 3.2vw, 48px);
}
.interface-grid .features-identity .fid-name{
  font-size: clamp(26px, 2.6vw, 40px);
}
.interface-grid .spotlight-dim{
  /* superseded by v16 surface wash — kept non-!important so v16 wins even if reordered */
  background: rgba(232, 235, 230, 0.5);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  filter: none;
}
/* No close control in theater (JS already omits; hide if any leftover) */
.interface-grid .detail-close{ display: inline-flex; align-items:center; gap:.35rem; margin:0 0 .75rem; }
@media(max-width:900px){
  .interface-grid.is-detail .detail-main{
    grid-template-columns: 1fr;
  }
}


/* === spotlight-surface-wash v16 === */
/* Dim is the page surface at ~50%, not a black/ink rectangle.
   Light letterbox matches .interface-grid aluminum surface #e8ebe6 (--surface).
   Dark matches html[data-theme=dark] .interface-grid background-color #1a2420.
   Sequential leave-then-enter (JS) so two hard holes never stack.
   Feature seats share the same 1650ms ease. No blur. No focus-window border. */
.interface-grid .spotlight-box,
.interface-grid .spotlight-box.suite-creet,
.interface-grid .spotlight-box.suite-framework,
.interface-grid .spotlight-box.suite-hover{
  border: none !important;
  box-shadow: none !important;
  background: transparent !important;
  outline: none !important;
  opacity: 0 !important;
}
.interface-grid .spotlight-dim{
  background: rgba(232, 235, 230, 0.5) !important; /* #e8ebe6 surface */
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  filter: none !important;
  transition: opacity 1650ms cubic-bezier(0.16, 1, 0.3, 1);
}
.interface-grid .spotlight-dim.is-leaving{
  transition: opacity 1650ms cubic-bezier(0.4, 0, 0.2, 1);
}
html[data-theme="dark"] .interface-grid .spotlight-dim{
  background: rgba(26, 36, 32, 0.5) !important; /* #1a2420 dark grid surface */
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  filter: none !important;
}


/* === explorer-clip-timing v17 === */
/* Spotlight dim clipped to overview browser-chrome display frame (not full PNG
   transparent padding that bleeds under the tile strip). Timing ~1650ms.
   Inactive strip tiles ~38% opacity. Features column +48px. */
.interface-grid .spotlight-stage{ overflow: hidden; }
.interface-grid .spotlight-mask{ overflow: hidden; }
.interface-grid .strip-wrap{ z-index: 3; }
.interface-grid.is-detail .tile:not(.is-selected){ opacity: 0.38; }
.interface-grid .features{ padding-top: 48px; }
.interface-grid .spotlight-dim{
  transition: opacity 1650ms cubic-bezier(0.16, 1, 0.3, 1);
}
.interface-grid .spotlight-dim.is-leaving{
  transition: opacity 1650ms cubic-bezier(0.4, 0, 0.2, 1);
}
.interface-grid .spotlight-box{
  transition:
    left 1650ms cubic-bezier(0.22, 0.61, 0.36, 1),
    top 1650ms cubic-bezier(0.22, 0.61, 0.36, 1),
    width 1650ms cubic-bezier(0.22, 0.61, 0.36, 1),
    height 1650ms cubic-bezier(0.22, 0.61, 0.36, 1);
}
.interface-grid .feature-seat{
  transition:
    background 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    color 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    padding 1650ms cubic-bezier(0.16, 1, 0.3, 1);
}
.interface-grid .feature-title{
  transition:
    color 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    font-weight 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    font-size 1650ms cubic-bezier(0.16, 1, 0.3, 1);
}
.interface-grid .feature-desc{
  transition:
    grid-template-rows 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    opacity 1650ms cubic-bezier(0.16, 1, 0.3, 1),
    margin 1650ms cubic-bezier(0.16, 1, 0.3, 1);
}


/* rad19e: screenshot tile-art rules removed; periodic-table text cards restored from rad18. */

/* Detail Back toolbar — below strip, never over carousel */
.interface-grid .detail-toolbar{
  display: none;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
  padding: 0;
  position: relative;
  z-index: 2;
}
.interface-grid.is-detail .detail-toolbar{
  display: flex;
}
.interface-grid .detail-toolbar .detail-close,
.interface-grid .detail > .detail-close,
.interface-grid .detail-close{
  position: static !important;
  top: auto !important;
  right: auto !important;
  left: auto !important;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0.45rem 0.9rem;
  min-height: 44px;
  border: 1px solid rgba(20,28,24,0.16);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 550;
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
  backdrop-filter: none;
  box-shadow: 0 1px 3px rgba(32,39,34,0.08);
}
.interface-grid:not(.is-detail) .detail-toolbar,
.interface-grid:not(.is-detail) .detail-close{
  display: none !important;
}


/* rad19f: keep Back fully below the card row.
   v11 max-height:112px + overflow:visible let the tiles paint into .detail-toolbar. */
.interface-grid.is-detail .strip-wrap{
  max-height: none;
  height: auto;
  overflow: visible;
  margin-bottom: 0;
}
.interface-grid.is-detail .detail-toolbar{
  position: static;
  z-index: auto;
  margin: 12px 0 8px;
  clear: both;
}