html,
body {
  min-height: 100%;
}

body {
  background: var(--night);
  transition: background-color 420ms var(--ease), color 420ms var(--ease);
}

body[data-tone='light'],
html[data-tone='light'] body {
  background: var(--paper);
  color: var(--ink);
}

.top {
  position: fixed;
  inset: 0 0 auto;
  z-index: 120;
  backdrop-filter: blur(18px);
  background: rgba(11, 16, 24, 0.88);
  border-bottom: 1px solid var(--night-line);
  transition: background-color 320ms var(--ease), border-color 320ms var(--ease);
}

html[data-tone='light'] .top {
  background: rgba(252, 250, 247, 0.94);
  border-bottom-color: var(--line);
}

.top-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  min-height: var(--topbar-h);
}

.marchai-brand {
  display: inline-flex;
  align-items: center;
  gap: 20px;
}

.marchai-brand:hover {
  text-decoration: none;
}

.marchai-brand__mark {
  width: 48px;
  height: 48px;
}

.marchai-brand__name {
  font-family: var(--font-brand);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.34em;
}

.top-progress {
  position: relative;
  height: 1px;
  align-self: stretch;
  display: flex;
  align-items: center;
}

.progress-track,
.progress-fill {
  position: absolute;
  inset: 50% 0 auto;
  height: 1px;
  transform: translateY(-50%);
}

.progress-track {
  background: rgba(247, 241, 232, 0.14);
}

html[data-tone='light'] .progress-track {
  background: var(--line);
}

.progress-fill {
  width: calc(var(--scroll, 0) * 100%);
  background: var(--accent);
}

.top-actions {
  display: inline-flex;
  align-items: center;
  gap: 18px;
}

.deck-counter {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--night-soft);
}

html[data-tone='light'] .deck-counter {
  color: var(--ink-faint);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease), color 180ms var(--ease);
  font-weight: 500;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--paper-2);
  color: var(--ink);
}

html[data-tone='light'] .btn-primary {
  background: var(--ink);
  color: var(--paper-2);
}

.btn-secondary {
  border-color: var(--night-line);
  color: var(--night-text);
}

html[data-tone='light'] .btn-secondary {
  border-color: var(--line-strong);
  color: var(--ink);
}

.deck {
  position: relative;
}

.slide {
  position: relative;
  min-height: 100svh;
  padding: calc(var(--topbar-h) + 82px) 0 72px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background-color 420ms var(--ease), color 420ms var(--ease);
}

.slide--dark {
  background:
    radial-gradient(circle at 88% 10%, rgba(180, 131, 61, 0.18), transparent 24%),
    radial-gradient(circle at 12% 88%, rgba(78, 103, 138, 0.14), transparent 28%),
    linear-gradient(180deg, #091018, #0b1119 42%, #0d131d 100%);
  color: var(--night-text);
  border-bottom-color: var(--night-line);
}

.slide--light {
  background:
    radial-gradient(circle at 10% 0%, rgba(180, 131, 61, 0.12), transparent 22%),
    radial-gradient(circle at 100% 100%, rgba(17, 17, 17, 0.04), transparent 26%),
    linear-gradient(180deg, #fffdf8, #f7f1e7 56%, #f3ede4 100%);
  color: var(--ink);
  border-bottom-color: var(--line);
}

.slide-meta {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(var(--topbar-h) + 14px);
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.7;
}

.slide-meta span:first-child {
  margin-right: 12px;
}

.slide-layout {
  width: 100%;
}

.slide-layout--hero,
.slide-layout--two-up,
.slide-layout--product {
  display: grid;
  gap: 54px;
  align-items: center;
}

.slide-layout--hero,
.slide-layout--two-up {
  grid-template-columns: 1fr 1fr;
}

.slide-layout--product {
  grid-template-columns: 0.94fr 1.06fr;
}

.slide-layout--single {
  display: grid;
  gap: 24px;
}

.display-xl {
  font-size: clamp(3.35rem, 6.8vw, 6.4rem);
  max-width: 9.4ch;
}

.lead {
  margin-top: 20px;
  font-size: clamp(1.08rem, 1.86vw, 1.24rem);
  line-height: 1.78;
  max-width: 34rem;
}

.slide--dark .lead,
.slide--dark .eyebrow,
.slide--dark .closing-panel p,
.slide--dark .fact-grid p,
.slide--dark .fact-grid h3 {
  color: var(--night-soft);
}

.slide--light .lead,
.slide--light .eyebrow,
.slide--light .closing-panel p,
.slide--light .fact-grid p,
.slide--light .fact-grid h3 {
  color: var(--ink-soft);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.hero-panel,
.diagram-shell,
.product-panel,
.closing-panel,
.fact-grid article,
.product-shot {
  border-radius: 34px;
  border: 1px solid transparent;
}

.slide--dark .hero-panel,
.slide--dark .diagram-shell,
.slide--dark .product-panel,
.slide--dark .closing-panel,
.slide--dark .fact-grid article,
.slide--dark .product-shot {
  background:
    radial-gradient(circle at 14% 16%, rgba(180, 131, 61, 0.1), transparent 22%),
    radial-gradient(circle at 86% 88%, rgba(98, 124, 158, 0.08), transparent 26%),
    linear-gradient(180deg, rgba(247, 241, 232, 0.055), rgba(247, 241, 232, 0.03));
  border-color: rgba(58, 70, 91, 0.78);
  box-shadow:
    0 36px 96px rgba(3, 6, 10, 0.36),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.slide--light .hero-panel,
.slide--light .diagram-shell,
.slide--light .product-panel,
.slide--light .closing-panel,
.slide--light .fact-grid article,
.slide--light .product-shot {
  background:
    radial-gradient(circle at 12% 16%, rgba(180, 131, 61, 0.08), transparent 20%),
    linear-gradient(180deg, rgba(255, 253, 249, 0.98), rgba(247, 239, 229, 0.96));
  border-color: rgba(205, 193, 178, 0.92);
  box-shadow:
    0 34px 86px rgba(15, 20, 28, 0.085),
    inset 0 1px 0 rgba(255, 255, 255, 0.76);
}

.hero-panel,
.diagram-shell,
.product-panel,
.product-shot {
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.hero-panel,
.diagram-shell {
  min-height: 430px;
  display: grid;
  align-items: center;
}

.hero-panel {
  min-height: 520px;
}

.hero-panel::before,
.diagram-shell::before,
.product-panel::before,
.closing-panel::before,
.product-shot::before {
  content: "";
  position: absolute;
  inset: 16px;
  border-radius: 26px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  pointer-events: none;
}

.slide--light .hero-panel::before,
.slide--light .diagram-shell::before,
.slide--light .product-panel::before,
.slide--light .closing-panel::before,
.slide--light .product-shot::before {
  border-color: rgba(17, 17, 17, 0.06);
}

.hero-panel::after,
.diagram-shell::after,
.product-shot::after {
  content: "";
  position: absolute;
  inset: auto 10% 1% 10%;
  height: 108px;
  background: radial-gradient(circle at center, rgba(8, 12, 18, 0.26), transparent 72%);
  filter: blur(24px);
  pointer-events: none;
}

.deck-svg {
  width: 100%;
  height: auto;
  display: block;
  position: relative;
  z-index: 1;
}

.hero-panel .deck-svg,
.diagram-shell .deck-svg {
  transform: scale(1.01);
  transform-origin: center;
  filter: drop-shadow(0 14px 26px rgba(9, 13, 18, 0.1));
}

.product-shot-stack {
  display: grid;
  gap: 22px;
}

.product-shot__frame {
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: #0d1219;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.slide--light .product-shot__frame {
  border-color: rgba(17, 17, 17, 0.08);
}

.product-shot__frame img {
  display: block;
  width: 100%;
  height: auto;
}

.product-shot__caption {
  margin-top: 14px;
  font-size: 0.96rem;
  line-height: 1.68;
}

.slide--dark .product-shot__caption {
  color: var(--night-soft);
}

.slide--light .product-shot__caption {
  color: var(--ink-soft);
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.fact-grid article {
  padding: 22px 20px 20px;
  position: relative;
  overflow: hidden;
}

.fact-grid article::before {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  top: 0;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(180, 131, 61, 0.92), rgba(180, 131, 61, 0.12));
}

.fact-grid h3,
.closing-panel h2 {
  margin: 0;
  font-family: var(--font-serif);
  letter-spacing: -0.03em;
  line-height: 1.04;
}

.fact-grid h3 {
  font-size: 1.38rem;
}

.fact-grid p,
.closing-panel p {
  margin: 12px 0 0;
  line-height: 1.76;
}

.closing-panel {
  padding: 40px 36px;
  position: relative;
  overflow: hidden;
}

#hero .hero-panel {
  background:
    radial-gradient(circle at 16% 18%, rgba(180, 131, 61, 0.16), transparent 20%),
    radial-gradient(circle at 82% 82%, rgba(105, 130, 162, 0.14), transparent 26%),
    linear-gradient(180deg, rgba(19, 26, 37, 0.98), rgba(12, 18, 27, 0.98));
}

#gap .diagram-shell,
#what-bazaar-is .diagram-shell,
#runtime-surfaces .diagram-shell,
#workflow-core .diagram-shell,
#action-rail .diagram-shell,
#trust-objects .diagram-shell,
#autodune .diagram-shell,
#use-cases .diagram-shell,
#cross-org .diagram-shell {
  isolation: isolate;
}

#gap .diagram-shell::after,
#what-bazaar-is .diagram-shell::after,
#runtime-surfaces .diagram-shell::after,
#workflow-core .diagram-shell::after,
#action-rail .diagram-shell::after,
#trust-objects .diagram-shell::after,
#autodune .diagram-shell::after,
#use-cases .diagram-shell::after,
#cross-org .diagram-shell::after {
  inset: auto 8% 0 8%;
  height: 118px;
}

#trust-objects .product-shot-stack,
#autodune .product-shot-stack,
#use-cases .product-shot-stack {
  align-content: center;
}

@media (max-width: 1120px) {
  .slide-layout--hero,
  .slide-layout--two-up,
  .slide-layout--product {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    min-height: 460px;
  }
}

@media (max-width: 820px) {
  .top-inner {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .top-progress {
    display: none;
  }

  .top-actions {
    justify-content: space-between;
  }

  .fact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .marchai-brand__mark {
    width: 42px;
    height: 42px;
  }

  .marchai-brand__name {
    font-size: 1.15rem;
    letter-spacing: 0.26em;
  }

  .hero-panel,
  .diagram-shell,
  .product-panel,
  .fact-grid article,
  .closing-panel {
    padding: 18px;
  }

  .hero-panel,
  .diagram-shell {
    min-height: auto;
  }
}