.stack-section {
  --stack-sticky-top: calc(76px + clamp(1rem, 2.3vw, 2rem));
  position: relative;
  overflow: visible;
  border-block: 1px solid var(--line);
  background: radial-gradient(circle at 82% 8%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 29rem), var(--bg);
  isolation: isolate;
}

.stack-shell {
  width: min(100%, var(--max));
  margin-inline: auto;
  padding: clamp(8rem, 13vw, 13rem) var(--pad) clamp(7rem, 12vw, 11rem);
}

.stack-header {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, .55fr);
  align-items: end;
  gap: clamp(2rem, 7vw, 8rem);
  margin-bottom: clamp(5rem, 9vw, 8.5rem);
}

.stack-index {
  margin: 0 0 1.4rem;
  color: var(--muted-bright);
  font-family: var(--mono);
  font-size: clamp(.72rem, .8vw, .82rem);
  font-weight: 500;
  letter-spacing: .14em;
}

.stack-title {
  margin: 0;
  font-size: clamp(4.5rem, 11vw, 10.5rem);
  font-weight: 800;
  letter-spacing: -.075em;
  line-height: .78;
  text-transform: uppercase;
}

.stack-intro {
  max-width: 31rem;
  margin: 0 0 .25rem;
  color: var(--muted-bright);
  font-size: clamp(1rem, 1.3vw, 1.24rem);
  line-height: 1.55;
  text-wrap: balance;
}

.stack-deck { position: relative; outline: none; }

.stack-deck:focus-visible {
  outline: 1px solid color-mix(in srgb, var(--accent) 70%, transparent);
  outline-offset: 1.25rem;
}

.stack-cards {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.stack-card-pin {
  position: relative;
  min-height: clamp(31rem, 62svh, 42rem);
  margin-bottom: clamp(1.5rem, 4vw, 4rem);
}

.stack-card {
  --stack-scale: 1;
  --stack-shift: 0px;
  --stack-brightness: 1;
  --stack-blur: 0px;
  --card-bg: #11110f;
  --card-fg: var(--fg);
  --card-muted: #aaa9a3;
  --card-line: rgba(255, 255, 255, .13);
  --card-accent: var(--accent);
  position: relative;
  height: 100%;
  min-height: inherit;
  padding: clamp(1.35rem, 3vw, 3rem);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  color: var(--card-fg);
  border: 1px solid color-mix(in srgb, var(--card-line) 88%, var(--card-accent));
  border-radius: clamp(1.45rem, 3vw, 2.6rem);
  background: radial-gradient(circle at 86% 15%, color-mix(in srgb, var(--card-accent) 16%, transparent), transparent 23rem), var(--card-bg);
  box-shadow: 0 1.9rem 5.5rem rgba(0, 0, 0, .42), 0 1.1rem 4.8rem color-mix(in srgb, var(--accent) 13%, transparent);
  filter: brightness(var(--stack-brightness)) blur(var(--stack-blur));
  transform: translate3d(0, var(--stack-shift), 0) scale(var(--stack-scale));
  transform-origin: 50% 0;
  will-change: transform, filter;
}

.stack-card[data-stack-tone="paper"] {
  --card-bg: #e8e4dc;
  --card-fg: #11110f;
  --card-muted: #5e5a53;
  --card-line: rgba(17, 17, 15, .15);
}

.stack-card[data-stack-tone="graphite"] { --card-bg: #282825; --card-muted: #c1c0ba; }

.stack-card[data-stack-tone="signal"] {
  --card-bg: var(--accent);
  --card-fg: #fff6f0;
  --card-muted: rgba(255, 246, 240, .78);
  --card-line: rgba(255, 255, 255, .25);
  --card-accent: #fff6f0;
}

.stack-card::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: .15;
  background-image: repeating-linear-gradient(0deg, transparent 0 5px, currentColor 5px 6px);
  mix-blend-mode: soft-light;
}

.stack-card-header,
.stack-card-body,
.stack-card-tools,
.stack-card-cue { position: relative; z-index: 2; }

.stack-card-header {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding-bottom: 1rem;
  color: var(--card-muted);
  border-bottom: 1px solid var(--card-line);
  font-family: var(--mono);
  font-size: clamp(.68rem, .74vw, .78rem);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.stack-card-header p { margin: 0; }

.stack-card-body {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(16rem, .55fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 7rem);
  padding-block: clamp(2rem, 5vw, 5rem);
  transform: translate3d(0, var(--stack-content-shift, 0), 0);
}

.stack-card-kicker {
  margin: 0 0 1rem;
  color: var(--card-accent);
  font-family: var(--mono);
  font-size: clamp(.7rem, .8vw, .82rem);
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.stack-card h3 {
  margin: 0;
  font-size: clamp(3.4rem, 7.4vw, 7.25rem);
  font-weight: 750;
  letter-spacing: -.07em;
  line-height: .79;
  text-wrap: balance;
}

.stack-card-copy {
  max-width: 31rem;
  margin: 0;
  color: var(--card-muted);
  font-family: var(--sans);
  font-size: clamp(1.12rem, 1.55vw, 1.5rem);
  line-height: 1.48;
}

.stack-card-tools {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin: 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--card-line);
  list-style: none;
}

.stack-card-tools li {
  padding: .62rem .85rem .58rem;
  color: var(--card-muted);
  border: 1px solid var(--card-line);
  border-radius: 999px;
  font-family: var(--sans);
  font-size: clamp(.74rem, .78vw, .84rem);
  font-weight: 600;
  line-height: 1;
}

.stack-card-cue {
  position: absolute;
  right: clamp(1.35rem, 3vw, 3rem);
  bottom: clamp(1.6rem, 3vw, 2.9rem);
  margin: 0;
  color: var(--card-muted);
  font-family: var(--mono);
  font-size: clamp(.66rem, .7vw, .74rem);
  letter-spacing: .04em;
}

.stack-card-cue span { margin-left: .55rem; color: var(--card-accent); }

.stack-card-ghost {
  position: absolute;
  right: -.05em;
  bottom: -.22em;
  z-index: 0;
  color: var(--card-fg);
  font-size: clamp(12rem, 26vw, 26rem);
  font-weight: 800;
  letter-spacing: -.13em;
  line-height: .72;
  opacity: .035;
  user-select: none;
}

.stack-pagination {
  position: absolute;
  top: 0;
  left: calc(100% + clamp(1rem, 2vw, 2.2rem));
  z-index: 20;
  display: grid;
  gap: .45rem;
}

.stack-pagination button {
  width: 2.7rem;
  height: 2.7rem;
  padding: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  border: 1px solid var(--line-bright);
  border-radius: 50%;
  background: var(--bg);
  cursor: pointer;
  font-family: var(--mono);
  font-size: .66rem;
  transition: color 220ms ease, background-color 220ms ease, border-color 220ms ease, transform 220ms ease;
}

.stack-pagination button[aria-current="true"] {
  color: #fff6f0;
  border-color: var(--accent);
  background: var(--accent);
  transform: scale(1.08);
}

.stack-section.is-stack-enhanced .stack-card-pin {
  position: sticky;
  top: var(--stack-sticky-top);
  height: min(67svh, 43rem);
  min-height: 31rem;
  margin-bottom: clamp(11rem, 23svh, 18rem);
}



@media (hover: hover) and (pointer: fine) {
  .stack-pagination button:hover,
  .stack-pagination button:focus-visible { color: var(--fg); border-color: var(--fg); }
}

@media (max-width: 1540px) {
  .stack-pagination {
    position: sticky;
    top: calc(var(--stack-sticky-top) + .6rem);
    left: auto;
    width: fit-content;
    height: 0;
    margin-left: auto;
    transform: translateX(-.75rem);
  }
}

@media (max-width: 760px) {
  .stack-section { --stack-sticky-top: calc(68px + .75rem); }
  .stack-shell { padding-top: 7.5rem; padding-bottom: 7.5rem; }
  .stack-header { grid-template-columns: 1fr; gap: 2rem; margin-bottom: 4rem; }
  .stack-title { font-size: clamp(4rem, 22vw, 7rem); }
  .stack-intro { max-width: 26rem; }

  .stack-pagination {
    top: auto;
    bottom: 1.15rem;
    width: 100%;
    height: auto;
    margin: 0;
    padding-inline: .9rem;
    display: flex;
    justify-content: center;
    transform: none;
  }

  .stack-pagination button { width: 2.45rem; height: 2.45rem; }

  .stack-section.is-stack-enhanced .stack-card-pin,
  .stack-card-pin { height: min(68svh, 38rem); min-height: 29rem; }

  .stack-section.is-stack-enhanced .stack-card-pin { margin-bottom: 18svh; }
  .stack-section.is-stack-enhanced .stack-card-pin:last-child { margin-bottom: 35svh; }
  .stack-card { padding: 1.25rem; border-radius: 1.55rem; }

  .stack-card-body {
    grid-template-columns: 1fr;
    align-content: center;
    gap: 1.5rem;
    padding-block: 1.5rem 4.4rem;
  }

  .stack-card h3 { font-size: clamp(3rem, 14vw, 4.9rem); }
  .stack-card-copy { max-width: 27rem; font-size: clamp(1rem, 4.2vw, 1.2rem); }
  .stack-card-cue { display: none; }
  .stack-card-tools { padding-right: 0; }
}

@media (max-height: 560px), (prefers-reduced-motion: reduce) {
  .stack-section.is-stack-enhanced .stack-card-pin,
  .stack-card-pin {
    position: relative;
    top: auto;
    height: auto;
    min-height: 28rem;
    margin-bottom: 1.5rem;
  }

  .stack-card { filter: none; transform: none; will-change: auto; }
  .stack-pagination { display: none; }
}