.terminal-showcase[hidden] { display: none !important; }

.signal-layers {
  --sl-bg: #151718;
  --sl-panel: #2a2e31;
  --sl-line: rgba(211, 224, 235, .24);
  --sl-text: #f5f7f8;
  --sl-muted: #aab3ba;
  --sl-blue: #78b9eb;
  position: relative;
  width: 100%;
  overflow: hidden;
  isolation: isolate;
  background: var(--sl-bg);
  color: var(--sl-text);
}

.signal-layers::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 76% 57%, rgba(48,117,171,.14), transparent 29%), linear-gradient(135deg, rgba(255,255,255,.018), transparent 42%);
  content: "";
  pointer-events: none;
}

.signal-layers__shell {
  width: min(100% - 64px, 1280px);
  margin-inline: auto;
  padding: clamp(76px, 8vw, 122px) 0 clamp(84px, 9vw, 132px);
}

.signal-layers__head {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(220px, .85fr);
  align-items: end;
  gap: 56px;
  margin-bottom: clamp(54px, 6vw, 82px);
}

.signal-layers__eyebrow {
  margin: 0 0 18px;
  color: var(--sl-blue);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .09em;
}

.signal-layers__head h2 {
  max-width: 760px;
  margin: 0;
  color: var(--sl-text);
  font-size: clamp(44px, 5vw, 68px);
  font-weight: 400;
  letter-spacing: -.055em;
  line-height: .98;
}

.signal-layers__head p:not(.signal-layers__eyebrow) {
  max-width: 650px;
  margin: 22px 0 0;
  color: var(--sl-muted);
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.55;
}

.signal-layers__cta {
  justify-self: center;
  align-self: center;
  display: inline-flex;
  align-items: center;
  gap: 13px;
  min-height: 48px;
  padding: 0 23px;
  border: 1px solid rgba(226,235,242,.28);
  border-radius: 999px;
  color: var(--sl-text);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color .25s ease, background-color .25s ease, transform .25s ease;
}

.signal-layers__cta:hover {
  border-color: rgba(120,185,235,.85);
  background: rgba(120,185,235,.08);
  transform: translateY(-2px);
}

.signal-layers__body {
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(370px, .86fr);
  align-items: center;
  gap: clamp(58px, 8vw, 116px);
}

.signal-layers__accordion { min-width: 0; border-bottom: 1px solid var(--sl-line); }
.signal-layer-item { border-top: 1px solid var(--sl-line); }

.signal-layer-item__trigger {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 17px;
  width: 100%;
  padding: 24px 4px 24px 0;
  border: 0;
  background: transparent;
  color: var(--sl-text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.signal-layer-item__trigger > span { color: var(--sl-blue); font-size: 13px; font-weight: 600; }
.signal-layer-item__trigger strong { font-size: clamp(18px, 1.55vw, 22px); font-weight: 500; letter-spacing: -.025em; line-height: 1.2; }
.signal-layer-item__trigger i { position: relative; width: 18px; height: 18px; }

.signal-layer-item__trigger i::before,
.signal-layer-item__trigger i::after {
  position: absolute;
  top: 8px;
  left: 2px;
  width: 14px;
  height: 1px;
  background: var(--sl-muted);
  content: "";
  transition: transform .3s ease, background-color .3s ease;
}

.signal-layer-item__trigger i::after { transform: rotate(90deg); }
.signal-layer-item.is-active .signal-layer-item__trigger i::after { transform: rotate(0); }
.signal-layer-item.is-active .signal-layer-item__trigger i::before,
.signal-layer-item.is-active .signal-layer-item__trigger i::after { background: var(--sl-blue); }

.signal-layer-item__panel {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows .48s cubic-bezier(.2,.75,.25,1), opacity .3s ease;
}

.signal-layer-item__panel > div { min-height: 0; overflow: hidden; }
.signal-layer-item.is-active .signal-layer-item__panel { grid-template-rows: 1fr; opacity: 1; }

.signal-layer-item__panel p {
  max-width: 620px;
  margin: 0;
  padding: 2px 40px 20px 45px;
  color: var(--sl-muted);
  font-size: 14px;
  line-height: 1.6;
}

.signal-layer-item__cards {
  display: flex;
  gap: 11px;
  margin-left: 45px;
  padding: 0 48px 29px 0;
  overflow-x: auto;
  scrollbar-width: none;
  mask-image: linear-gradient(to right, #000 0%, #000 calc(100% - 56px), transparent 100%);
}

.signal-layer-item__cards::-webkit-scrollbar { display: none; }

.signal-layer-item__cards span {
  flex: 0 0 180px;
  display: grid;
  gap: 10px;
  min-height: 92px;
  padding: 17px;
  border: 1px solid rgba(211,224,235,.22);
  border-radius: 13px;
  background: rgba(47,52,56,.76);
  transform: translateY(12px);
  transition: transform .45s cubic-bezier(.2,.75,.25,1), border-color .3s ease;
}

.signal-layer-item.is-active .signal-layer-item__cards span { transform: translateY(0); }
.signal-layer-item__cards span:hover { border-color: rgba(120,185,235,.58); }
.signal-layer-item__cards b { color: var(--sl-text); font-size: 13px; font-weight: 600; }
.signal-layer-item__cards small { align-self: end; color: var(--sl-blue); font-size: 12px; }

.signal-layers__visual {
  position: relative;
  justify-self: center;
  width: min(100%, 430px);
  height: 550px;
  perspective: 900px;
}

.signal-layers__rail {
  position: absolute;
  top: 32px;
  bottom: 31px;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--sl-line) 12%, var(--sl-line) 88%, transparent);
}

.signal-layers__rail--left { left: 1px; }
.signal-layers__rail--center { left: 50%; }
.signal-layers__rail--right { right: 1px; }

.signal-layer-plate {
  --plate-y: 46px;
  position: absolute;
  top: 0;
  left: 50%;
  width: 276px;
  height: 276px;
  border: 1px solid rgba(211,224,235,.3);
  background: #17191a;
  transform: translate(-50%, var(--plate-y)) rotateX(64deg) rotateZ(45deg) scale(.82);
  transform-style: preserve-3d;
  transition: transform .62s cubic-bezier(.2,.78,.22,1), border-color .38s ease, background-color .38s ease, box-shadow .38s ease;
}

.signal-layer-plate::before {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(211,224,235,.18);
  background: #17191a;
  content: "";
  transform: translateZ(-17px);
}

.signal-layer-plate::after {
  position: absolute;
  inset: 11%;
  border: 1px solid rgba(120,185,235,.08);
  content: "";
  transition: border-color .35s ease, background-color .35s ease;
}

.signal-layer-plate:nth-of-type(1) { --plate-y: 46px; z-index: 4; }
.signal-layer-plate:nth-of-type(2) { --plate-y: 144px; z-index: 3; }
.signal-layer-plate:nth-of-type(3) { --plate-y: 242px; z-index: 2; }
.signal-layer-plate:nth-of-type(4) { --plate-y: 340px; z-index: 1; }

.signal-layer-plate.is-active {
  border-color: rgba(224,242,255,.95);
  background: #19232a;
  box-shadow: 0 0 0 1px rgba(120,185,235,.14), 0 0 42px rgba(69,142,197,.2);
  transform: translate(-50%, calc(var(--plate-y) - 15px)) rotateX(64deg) rotateZ(45deg) scale(.88);
}

.signal-layer-plate.is-active::after { border-color: rgba(120,185,235,.5); background: rgba(70,139,191,.08); }

.signal-layer-plate span {
  position: absolute;
  top: 50%;
  left: 50%;
  color: var(--sl-blue);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .07em;
  opacity: 0;
  transform: translate(-50%, -50%) rotateZ(-45deg) rotateX(-64deg);
  transition: opacity .3s ease;
}

.signal-layer-plate.is-active span { opacity: 1; }

@media (max-width: 900px) {
  .signal-layers__shell { width: min(100% - 40px, 720px); }
  .signal-layers__head { grid-template-columns: 1fr; gap: 28px; }
  .signal-layers__cta { justify-self: start; }
  .signal-layers__body { grid-template-columns: 1fr; gap: 44px; }
  .signal-layers__visual { height: 470px; transform: scale(.88); transform-origin: top center; }
}

@media (max-width: 560px) {
  .signal-layers__shell { width: min(100% - 28px, 500px); padding-block: 68px 80px; }
  .signal-layers__head h2 { font-size: clamp(40px, 12vw, 54px); }
  .signal-layer-item__trigger { grid-template-columns: 24px minmax(0, 1fr) 20px; gap: 12px; padding-block: 21px; }
  .signal-layer-item__trigger strong { font-size: 18px; }
  .signal-layer-item__panel p { padding-left: 36px; padding-right: 8px; }
  .signal-layer-item__cards { margin-left: 36px; }
  .signal-layers__visual { width: 390px; margin-left: 50%; transform: translateX(-50%) scale(.74); }
}

@media (prefers-reduced-motion: reduce) {
  .signal-layer-item__panel,
  .signal-layer-item__cards span,
  .signal-layer-plate,
  .signal-layer-plate::after { transition: none; }
}

/* Geometry follows the compact stacked reference: inactive layers stay grouped
   while the selected layer separates from the stack. */
.signal-layers__shell {
  padding-top: clamp(62px, 6.5vw, 92px);
  padding-bottom: clamp(72px, 7vw, 104px);
}

.signal-layers__head {
  grid-template-columns: minmax(0, 1.25fr) minmax(270px, .75fr);
  align-items: center;
  margin-bottom: clamp(44px, 4.5vw, 62px);
}

.signal-layers__head h2 {
  max-width: 820px;
  font-size: clamp(42px, 4.15vw, 60px);
  line-height: 1;
}

.signal-layers__body {
  grid-template-columns: minmax(0, 1.16fr) 392px;
  gap: clamp(72px, 8vw, 120px);
}

.signal-layer-item__cards span { flex-basis: 252px; }

.signal-layers__visual {
  width: 392px;
  height: 552px;
  perspective: none;
}

.signal-layer-plate {
  --plate-y: 78px;
  width: 374px;
  height: 196px;
  border: 0;
  background: rgba(211,224,235,.34);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transform: translate(-50%, var(--plate-y));
  transition: transform .58s cubic-bezier(.2,.78,.22,1), background-color .32s ease, filter .32s ease;
}

.signal-layer-plate::before {
  inset: 1px;
  border: 0;
  background: var(--sl-bg);
  clip-path: inherit;
  transform: none;
}

.signal-layer-plate::after {
  inset: 10px 12px;
  z-index: 1;
  border: 1px solid rgba(120,185,235,.08);
  background: transparent;
  clip-path: inherit;
}

.signal-layer-plate span { display: none; }

.signal-layer-plate.is-active {
  background: rgba(232,244,252,.96);
  filter: drop-shadow(0 16px 20px rgba(0,0,0,.22)) drop-shadow(0 0 14px rgba(73,144,198,.14));
  transform: translate(-50%, var(--plate-y));
}

.signal-layer-plate.is-active::before { background: #172027; }
.signal-layer-plate.is-active::after { border-color: rgba(120,185,235,.46); background: rgba(70,139,191,.05); }

.signal-layers[data-active-layer="0"] [data-layer-plate="0"] { --plate-y: 44px; }
.signal-layers[data-active-layer="0"] [data-layer-plate="1"] { --plate-y: 258px; }
.signal-layers[data-active-layer="0"] [data-layer-plate="2"] { --plate-y: 292px; }
.signal-layers[data-active-layer="0"] [data-layer-plate="3"] { --plate-y: 326px; }

.signal-layers[data-active-layer="1"] [data-layer-plate="0"] { --plate-y: 42px; }
.signal-layers[data-active-layer="1"] [data-layer-plate="1"] { --plate-y: 188px; }
.signal-layers[data-active-layer="1"] [data-layer-plate="2"] { --plate-y: 366px; }
.signal-layers[data-active-layer="1"] [data-layer-plate="3"] { --plate-y: 400px; }

.signal-layers[data-active-layer="2"] [data-layer-plate="0"] { --plate-y: 40px; }
.signal-layers[data-active-layer="2"] [data-layer-plate="1"] { --plate-y: 74px; }
.signal-layers[data-active-layer="2"] [data-layer-plate="2"] { --plate-y: 248px; }
.signal-layers[data-active-layer="2"] [data-layer-plate="3"] { --plate-y: 426px; }

.signal-layers[data-active-layer="3"] [data-layer-plate="0"] { --plate-y: 38px; }
.signal-layers[data-active-layer="3"] [data-layer-plate="1"] { --plate-y: 72px; }
.signal-layers[data-active-layer="3"] [data-layer-plate="2"] { --plate-y: 106px; }
.signal-layers[data-active-layer="3"] [data-layer-plate="3"] { --plate-y: 318px; }

@media (max-width: 900px) {
  .signal-layers__head { grid-template-columns: 1fr; }
  .signal-layers__body { grid-template-columns: 1fr; }
  .signal-layers__visual { height: 500px; }
}

/* Exact neutral palette and two-face plate geometry from the supplied reference. */
.signal-layers {
  --sl-bg: #181818;
  --sl-panel: #312e2e;
  --sl-line: #5c5858;
  --sl-text: #faf6f1;
  --sl-muted: #b5b1ad;
  background: #181818;
}

.signal-layers::before { background: none; }
.signal-layers__eyebrow { display: none; }
.signal-layers__head { align-items: center; }
.signal-layers__head h2 { color: #faf6f1; }
.signal-layers__head p:not(.signal-layers__eyebrow) { color: #b5b1ad; }
.signal-layers__cta { border-color: #5c5858; color: #faf6f1; }
.signal-layers__accordion,
.signal-layer-item { border-color: #5c5858; }
.signal-layer-item__trigger { color: #faf6f1; }
.signal-layer-item__trigger i::before,
.signal-layer-item__trigger i::after { background: #b5b1ad; }
.signal-layer-item__panel p { color: #b5b1ad; }
.signal-layer-item__cards span { border-color: #5c5858; background: #312e2e; }
.signal-layer-item__cards b { color: #faf6f1; }

.signal-layers__visual {
  width: 392px;
  height: 552px;
  perspective: none;
}

.signal-layers__diagram {
  display: block;
  width: 392px;
  height: 552px;
  overflow: visible;
}

.signal-layers__diagram > line {
  stroke: #5c5858;
  stroke-width: .6;
}

.signal-layer-plate,
.signal-layer-plate.is-active {
  --plate-y: 137.5px;
  width: auto;
  height: auto;
  border: 0;
  background: none;
  clip-path: none;
  filter: none;
  box-shadow: none;
  transform: translate(196px, var(--plate-y));
  transform-origin: 50% 50%;
  transform-box: fill-box;
  transition: transform .58s cubic-bezier(.2,.78,.22,1);
}

.signal-layer-plate::before,
.signal-layer-plate::after { content: none; }

.signal-layer-plate path {
  fill: #181818;
  stroke: #5c5858;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  transition: stroke .28s ease;
}

.signal-layer-plate.is-active path { stroke: #faf6f1; }

.signal-layers[data-active-layer="0"] [data-layer-plate="0"] { --plate-y: 137.5px; }
.signal-layers[data-active-layer="0"] [data-layer-plate="1"] { --plate-y: 315.5px; }
.signal-layers[data-active-layer="0"] [data-layer-plate="2"] { --plate-y: 353.5px; }
.signal-layers[data-active-layer="0"] [data-layer-plate="3"] { --plate-y: 391.5px; }

.signal-layers[data-active-layer="1"] [data-layer-plate="0"] { --plate-y: 137.5px; }
.signal-layers[data-active-layer="1"] [data-layer-plate="1"] { --plate-y: 245.5px; }
.signal-layers[data-active-layer="1"] [data-layer-plate="2"] { --plate-y: 353.5px; }
.signal-layers[data-active-layer="1"] [data-layer-plate="3"] { --plate-y: 391.5px; }

.signal-layers[data-active-layer="2"] [data-layer-plate="0"] { --plate-y: 137.5px; }
.signal-layers[data-active-layer="2"] [data-layer-plate="1"] { --plate-y: 175.5px; }
.signal-layers[data-active-layer="2"] [data-layer-plate="2"] { --plate-y: 315.5px; }
.signal-layers[data-active-layer="2"] [data-layer-plate="3"] { --plate-y: 391.5px; }

.signal-layers[data-active-layer="3"] [data-layer-plate="0"] { --plate-y: 137.5px; }
.signal-layers[data-active-layer="3"] [data-layer-plate="1"] { --plate-y: 175.5px; }
.signal-layers[data-active-layer="3"] [data-layer-plate="2"] { --plate-y: 213.5px; }
.signal-layers[data-active-layer="3"] [data-layer-plate="3"] { --plate-y: 391.5px; }

@media (max-width: 560px) {
  .signal-layers__diagram { width: 392px; height: 552px; }
}