/* =========================================================
   Whitespace Solutions — Home page only
   ========================================================= */

/* ---------- Hero ---------- */
.hero {
  overflow: hidden;
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: 48px;
  min-height: min(calc(var(--screen-h) - var(--header-h)), 900px);
}

.hero__text {
  padding-block: 64px;
  z-index: 1;
}

/* Longer headline than the old one, so it runs one step smaller than --step-5 */
.hero__text .display {
  max-width: 9.5em;
  font-size: clamp(2.5rem, 1.5rem + 3.4vw, 5rem);
}

.hero__text .lead {
  max-width: 580px;
  margin: 40px 0 44px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 32px;
}

.hero__matrix {
  position: relative;
  align-self: stretch;
  display: flex;
  align-items: center;
}

/* The matrix is drawn larger than its column and bleeds off the right and top edges;
   .hero (overflow: hidden) crops it. */
.hero__svg {
  flex-shrink: 0;
  width: 170%;
  margin: -4% -76% -26% 6%;
}

.hero__svg .vx-face[data-col] {
  cursor: crosshair;
}

.hero__svg .vx-face.is-hover {
  fill: var(--orange);
  stroke: var(--orange);
}

.hero__caption {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 24px;
  padding: 8px 12px;
  background: var(--white);
  border: 1px solid var(--line);
  font-stretch: 85%;
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
}

/* ---------- Why Whitespace ---------- */
.why .values {
  margin-top: var(--head-space);
}

/* ---------- GSAP mode (js/motion.js adds html.gsap-motion) ----------
   GSAP draws the runway chart with inline styles, so its CSS transitions are switched off. */
.gsap-motion .rw-line,
.gsap-motion .rw-pivot,
.gsap-motion .rw-end {
  transition: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 0;
    min-height: 0;
  }

  /* Headline, lead and buttons centred, like every section head on mobile (css/components.css) */
  .hero__text {
    padding-bottom: 16px;
    text-align: center;
  }

  .hero__text .display,
  .hero__text .lead {
    margin-inline: auto;
  }

  /* Four lines on phones: "Practical business / transformation, / now built / around AI."
     "Practical business" is 9.9em wide, so the box allows 10.2em and the size follows the column
     (cqi = 1% of .hero__text) so that line always fits. "around AI." keeps AI. off its own line. */
  .hero__text {
    container-type: inline-size;
  }

  .hero__text .display {
    max-width: 10.2em;
    font-size: min(clamp(2.5rem, 1.5rem + 3.4vw, 5rem), 9.6cqi);
    text-wrap: balance;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__matrix {
    flex-direction: column;
    align-items: stretch;
  }

  /* Below the text on phones: bleed off the right edge only */
  .hero__svg {
    width: 135%;
    margin: 0 -35% 0 0;
  }

  .hero__caption {
    position: static;
    align-self: center;
    margin-top: 12px;
    text-align: center;
  }
}

/* =========================================================
   Home: point lists styled after nalarx.com
   ========================================================= */

/* ---------- How it works: rows that open one at a time, as on nalarx.com ----------
   The open row gets a full-width tint, a dash before its title and a small card in the middle.
   Without JS every row is open (the cards only collapse under html.js). */
.how-list {
  margin-bottom: var(--head-space);
  border-bottom: 1px solid var(--line);
}

.how-step {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  column-gap: 40px;
  padding-block: 34px;
  border-top: 1px solid var(--line);
  isolation: isolate;
  --how-ease: cubic-bezier(0.65, 0, 0.35, 1);
}

/* Tint runs edge to edge, past the container, as one layer that fades in and out
   (.work clips it sideways, so it never adds page scroll) */
.how-step::before {
  content: "";
  position: absolute;
  inset: 0 -100vmax;
  z-index: -1;
  background: rgba(255, 255, 255, 0.04);
  opacity: 0;
  transition: opacity 0.6s var(--how-ease);
}

.how-step.is-open::before {
  opacity: 1;
}

.work {
  overflow-x: clip;
}

.how-step__toggle {
  padding: 0;
  font: inherit;
  text-align: left;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

/* The whole row is the click target */
.how-step__toggle::after {
  content: "";
  position: absolute;
  inset: 0;
}

.how-step__title {
  display: flex;
  align-items: center;
  font-size: var(--step-2);
  font-weight: 600;
  font-stretch: 100%;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--muted);
  transition: color 0.3s ease;
}

.how-step__toggle:hover .how-step__title,
.how-step.is-open .how-step__title {
  color: var(--ink);
}

.how-step__dash {
  flex: none;
  width: 0;
  height: 1.5px;
  margin-right: 0;
  background: var(--orange);
  transition: width 0.6s var(--how-ease), margin 0.6s var(--how-ease);
}

.how-step.is-open .how-step__dash {
  width: 36px;
  margin-right: 18px;
}

.how-step__num {
  margin-right: 16px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.how-step__body {
  display: flex;
  align-items: center;
}

.how-step__visual {
  display: grid;
  grid-template-rows: 1fr;
  width: 380px;
  padding-right: 40px;
  /* Opening: the space opens first, then the card fades and rises in */
  transition:
    grid-template-rows 0.6s var(--how-ease),
    opacity 0.45s ease 0.2s;
}

.how-step__visual > div {
  overflow: hidden;
}

.how-card {
  transition: transform 0.6s var(--how-ease) 0.15s;
}

.js .how-step:not(.is-open) .how-step__visual {
  grid-template-rows: 0fr;
  opacity: 0;
  /* Closing: the card fades first, then the space folds away */
  transition:
    grid-template-rows 0.55s var(--how-ease) 0.12s,
    opacity 0.25s ease;
}

.js .how-step:not(.is-open) .how-card {
  transform: translateY(10px);
  transition-delay: 0s;
}

.how-step__text {
  width: 320px;
  font-size: 15px;
  color: var(--muted);
  transition: color 0.5s ease;
}

.how-step.is-open .how-step__text {
  color: var(--text);
}

/* Small card in the open row: fine grid texture, as on Nalar */
.how-card {
  padding: 18px 20px;
  font-size: 13px;
  line-height: 1.4;
  background-color: var(--panel);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 5px 5px;
  border: 1px solid var(--line);
}

.how-card__label {
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--muted);
}

.how-card__rows li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
  border-top: 1px solid var(--line);
}

.how-card__rows li span:first-child {
  color: var(--ink);
}

.how-card__rows li span:last-child {
  color: var(--muted);
  text-align: right;
}

.how-card__rows--check li span:last-child {
  color: var(--orange);
}

.how-card__chips {
  display: flex;
  gap: 8px;
}

.how-card__chips li {
  flex: 1;
  padding: 10px 0;
  text-align: center;
  font-weight: 600;
  color: var(--ink);
  border: 1px solid var(--line-strong);
}

.how-card__formula {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
}

.how-card__formula span {
  flex: 1;
  padding: 10px 0;
  text-align: center;
  font-weight: 600;
  color: var(--ink);
  background: var(--orange-soft);
  border: 1px solid var(--orange);
}

.how-card__foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.how-card__foot span:last-child {
  font-weight: 600;
  color: var(--ink);
}

@media (prefers-reduced-motion: reduce) {
  .how-step::before,
  .how-step__dash,
  .how-step__visual,
  .how-card,
  .js .how-step:not(.is-open) .how-step__visual {
    transition: none;
  }

  .js .how-step:not(.is-open) .how-card {
    transform: none;
  }
}

@media (hover: hover) {
  /* Why Whitespace: the card under the pointer stays bright, the others step back */
  .why .values:hover .value:not(:hover) > * {
    opacity: 0.45;
  }
}

.why .value > * {
  transition: opacity 0.4s var(--ease-out);
}

@media (max-width: 1000px) {
  .how-step {
    grid-template-columns: 1fr;
    padding-block: 24px;
  }

  .how-step__body {
    flex-direction: column;
    align-items: stretch;
  }

  .how-step__text {
    order: -1;
    width: auto;
    margin-top: 10px;
  }

  .how-step__visual {
    width: auto;
    max-width: 400px;
    padding: 16px 0 0;
  }
}

/* The runway chart sets its zone, grid and target line as svg attributes; re-colour them on black */
.section--dark .chart rect {
  fill: var(--orange-soft);
}

.section--dark .chart g[stroke] {
  stroke: var(--line);
}

.section--dark .chart line[stroke] {
  stroke: var(--line-strong);
}

/* ---------- The problem: looping card stack, after archive-devin-ai.lusion.co ----------
   Default (no JS, reduced motion, phones): the three cards sit in a plain list.
   js/home.js adds .is-stack: the cards stack up and take the front in turn, on a loop,
   while earlier cards step back to the left.
   data-d on a card = how far it sits behind the front one (0 front, 1–2 behind). */
.problem {
  position: relative;
  overflow-x: clip;
}

.problem__pin {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  align-items: center;
  gap: clamp(40px, 6vw, 112px);
}

.problem__intro .lead {
  max-width: 460px;
  margin-top: 28px;
}

.problem__stage {
  position: relative;
  display: grid;
  gap: 16px;
}

/* Warm glow behind the cards */
.problem__stage::before {
  content: "";
  position: absolute;
  inset: -20% -10% -20% 10%;
  z-index: -1;
  background: radial-gradient(closest-side, rgba(242, 144, 42, 0.16), transparent);
  filter: blur(20px);
  pointer-events: none;
}

.shift {
  display: grid;
  background:
    radial-gradient(120% 80% at 100% 100%, rgba(242, 144, 42, 0.1), transparent 60%),
    linear-gradient(180deg, #23272d, #191c20);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.07),
    0 30px 70px rgba(0, 0, 0, 0.45);
}

.shift__from,
.shift__to {
  padding: 28px 32px;
}

.shift__from {
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.shift__tag {
  margin-bottom: 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.shift__to .shift__tag {
  color: var(--orange);
}

.shift h3 {
  margin-bottom: 8px;
  font-size: var(--step-2);
  font-weight: 650;
  font-stretch: 100%;
  letter-spacing: -0.015em;
  line-height: 1.15;
}

.shift p:not(.shift__tag) {
  font-size: 15px;
}

.shift__from h3 {
  color: var(--muted);
}

.shift__to {
  position: relative;
}

.shift__to::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--orange);
}

/* ---------- Stack mode ---------- */
/* Cards share one grid cell, so the stage is exactly as tall as the tallest card */
.problem.is-stack .problem__stage {
  grid-template-columns: 1fr;
  gap: 0;
}

.problem.is-stack .shift {
  --ease: cubic-bezier(0.65, 0, 0.35, 1);
  grid-area: 1 / 1;
  /* Front card sits right of the stage, so the fanned-out cards stay inside it */
  margin-left: 20%;
  transform-origin: left center;
  transition: transform 0.7s var(--ease), opacity 0.7s var(--ease), filter 0.7s var(--ease);
}

.problem.is-stack .shift[data-d="0"] {
  z-index: 3;
}

/* Cards behind fan out to the left, so a strip of each stays visible */
.problem.is-stack .shift[data-d="1"] {
  z-index: 2;
  transform: translateX(-14%) scale(0.9);
  opacity: 0.5;
  filter: blur(1px);
}

.problem.is-stack .shift[data-d="2"] {
  z-index: 1;
  transform: translateX(-25%) scale(0.8);
  opacity: 0.25;
  filter: blur(2px);
}

/* Inside the front card the new way rises in.
   The card at the back resets, so it plays again when the loop brings it to the front. */
.problem.is-stack .shift__to > * {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease 0.35s, transform 0.5s var(--ease) 0.35s;
}

.problem.is-stack .shift__to::before {
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.5s var(--ease) 0.3s;
}

.problem.is-stack .shift[data-d="0"] .shift__to > *,
.problem.is-stack .shift[data-d="1"] .shift__to > * {
  opacity: 1;
  transform: none;
}

.problem.is-stack .shift[data-d="0"] .shift__to::before,
.problem.is-stack .shift[data-d="1"] .shift__to::before {
  transform: none;
}


@media (max-width: 900px) {
  .problem__pin {
    grid-template-columns: 1fr;
  }

  .shift__from,
  .shift__to {
    padding: 22px;
  }

  /* No deep drop shadow in the plain list: it would spill onto the white section below */
  .shift {
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07);
  }
}