:root {
  --radius: 0.75rem;
  --background: oklch(1 0 0);
  --foreground: oklch(0.21 0.03 250);
  --primary: oklch(0.55 0.16 245);
  --primary-foreground: oklch(0.99 0.005 240);
  --primary-soft: oklch(0.96 0.025 240);
  --primary-glow: oklch(0.7 0.13 240);
  --secondary: oklch(0.97 0.012 240);
  --muted-foreground: oklch(0.5 0.025 250);
  --accent: oklch(0.95 0.04 235);
  --destructive: oklch(0.577 0.245 27.325);
  --border: oklch(0.93 0.012 240);
  --gradient-hero: radial-gradient(circle at top, oklch(0.94 0.05 240 / 0.72), transparent 60%);
  --shadow-soft: 0 1px 2px oklch(0.55 0.16 245 / 0.04), 0 8px 24px oklch(0.55 0.16 245 / 0.06);
  --shadow-card: 0 1px 3px oklch(0.21 0.03 250 / 0.05), 0 20px 44px oklch(0.55 0.16 245 / 0.06);
  --font-display: "Instrument Serif", Georgia, serif;
  --font-sans: "Inter", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, oklch(0.98 0.015 240), transparent 24rem),
    linear-gradient(180deg, oklch(1 0 0), oklch(0.985 0.006 240));
  color: var(--foreground);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  overflow: hidden;
}

button {
  font: inherit;
}

.deck-shell {
  position: relative;
  min-height: 100vh;
  padding: 1.25rem;
}

.topbar,
.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 92rem;
  margin: 0 auto;
}

.topbar {
  padding: 0.25rem 0 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.875rem;
  background: var(--primary);
  color: var(--primary-foreground);
  font-weight: 700;
  box-shadow: var(--shadow-soft);
}

.brand-name {
  margin: 0.1rem 0 0;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.eyebrow,
.kicker,
.segment-tag,
.process-step {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.74rem;
  font-weight: 600;
}

.eyebrow,
.kicker {
  color: var(--primary);
}

.topbar-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--muted-foreground);
  font-size: 0.9rem;
}

.ghost-button,
.nav-button {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in oklch, white 82%, var(--secondary));
  color: var(--foreground);
  padding: 0.7rem 1rem;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease;
}

.ghost-button:hover,
.nav-button:hover {
  transform: translateY(-1px);
  background: var(--secondary);
}

.ghost-button:disabled,
.nav-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.nav-button.primary {
  background: var(--primary);
  border-color: transparent;
  color: var(--primary-foreground);
}

.deck {
  position: relative;
  max-width: 92rem;
  margin: 0 auto;
  min-height: calc(100vh - 10.25rem);
}

.slide {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: start;
  gap: 1rem;
  padding: 2.3rem;
  border: 1px solid color-mix(in oklch, var(--border) 86%, white);
  border-radius: 2rem;
  background:
    linear-gradient(180deg, color-mix(in oklch, white 92%, var(--secondary)) 0%, white 100%);
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transform: translateX(48px) scale(0.985);
  transition:
    opacity 360ms ease,
    transform 420ms ease,
    visibility 0ms linear 420ms;
  overflow: hidden;
}

.slide::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 16rem;
  background: var(--gradient-hero);
  pointer-events: none;
}

.slide.is-active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0) scale(1);
  transition:
    opacity 360ms ease,
    transform 420ms ease,
    visibility 0ms;
}

.slide-hero {
  grid-template-columns: 1.2fr 0.95fr;
  align-items: center;
}

.hero-copy,
.hero-panel,
.section-heading,
.process-grid,
.tool-stack,
.split-layout,
.three-up,
.comparison-grid,
.kpi-grid,
.final-callout {
  position: relative;
  z-index: 1;
}

.hero-copy h1,
.section-heading h2,
.final-callout h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 0.98;
}

.hero-copy h1 {
  max-width: 11ch;
  font-size: clamp(2.9rem, 5vw, 5.2rem);
}

.section-heading h2,
.final-callout h2 {
  font-size: clamp(2.15rem, 3.7vw, 4rem);
}

.section-subtitle {
  max-width: 42rem;
  margin: 0.6rem 0 0;
  color: var(--muted-foreground);
  line-height: 1.55;
}

.accent-italic {
  color: var(--primary);
  font-style: italic;
}

.lede,
.bullet-list,
.metric-label,
.panel-note,
.tool-card p,
.feature-card p,
.process-card p,
.quote-card p {
  color: var(--muted-foreground);
  line-height: 1.55;
}

.lede {
  max-width: 46rem;
  margin: 1rem 0 0;
  font-size: 1.05rem;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.35rem;
}

.hero-pills span,
.segment-tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  background: var(--primary-soft);
  color: var(--primary);
}

.card {
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  background: white;
  box-shadow: 0 1px 2px oklch(0.21 0.03 250 / 0.03);
}

.hero-panel,
.process-card,
.tool-card,
.feature-card,
.segment-card,
.kpi-card {
  padding: 1.15rem 1.2rem;
}

.metric-grid,
.process-grid,
.tool-stack,
.split-layout,
.three-up,
.comparison-grid,
.kpi-grid {
  display: grid;
  gap: 0.9rem;
}

.metric-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 0.8rem;
}

.metric-grid > div,
.kpi-card {
  padding: 0.95rem;
  border-radius: 1.1rem;
  background: white;
  border: 1px solid var(--border);
}

.metric-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.process-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.process-grid-offset {
  margin-top: 30px;
}

.content-offset {
  margin-top: 30px;
}

.tool-stack {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.process-grid-short {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.process-card {
  background: white;
}

.stack-card {
  padding: 1rem 1.15rem;
  background: white;
  background-image: none;
}

.tool-stack .card,
.split-layout .tool-card {
  background: white;
  background-image: none;
}

.process-step {
  display: inline-grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 0.7rem;
}

.process-card h3,
.tool-card h3,
.feature-card h3 {
  margin: 0.3rem 0 0.45rem;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.feature-card h3,
.segment-card h3,
.tool-card h3,
.process-card h3,
.stack-card h3 {
  color: var(--foreground);
}

.split-layout,
.comparison-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tool-card,
.feature-card,
.segment-card {
  background: white;
}

.three-up,
.kpi-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.kpi-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bullet-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
}

.bullet-list li + li {
  margin-top: 0.48rem;
}

.bullet-list li {
  position: relative;
  padding-left: 0.95rem;
  color: var(--muted-foreground);
  line-height: 1.52;
}

.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52rem;
  width: 0.32rem;
  height: 0.32rem;
  border-radius: 999px;
  background: color-mix(in oklch, var(--primary) 82%, white);
}

.quote-card {
  padding: 1rem 1.15rem;
  background: color-mix(in oklch, white 55%, var(--primary-soft));
  border-color: color-mix(in oklch, var(--border) 75%, var(--primary-soft));
}

.quote-card p {
  margin: 0;
  font-size: 0.98rem;
}

.kicker,
.segment-tag {
  display: inline-block;
  margin-bottom: 0.55rem;
  padding: 0;
  background: transparent;
  color: var(--primary);
}

.segment-tag.good {
  background: transparent;
  color: var(--primary);
}

.kpi-card {
  min-height: 8.3rem;
}

.final-callout {
  margin-top: auto;
  padding-top: 0.3rem;
}

.overview-panel {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  width: min(24rem, calc(100vw - 3rem));
  max-height: calc(100vh - 3rem);
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 1.6rem;
  background: color-mix(in oklch, white 88%, var(--secondary));
  box-shadow: var(--shadow-card);
  transform: translateX(calc(100% + 2rem));
  transition: transform 280ms ease;
  z-index: 5;
}

.overview-panel.is-open {
  transform: translateX(0);
}

.overview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.overview-list {
  display: grid;
  gap: 0.55rem;
  margin-top: 1rem;
}

.overview-item {
  width: 100%;
  text-align: left;
  padding: 0.95rem 1rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: white;
  color: var(--foreground);
  cursor: pointer;
}

.overview-item.is-current {
  border-color: color-mix(in oklch, var(--primary) 40%, var(--border));
  background: var(--primary-soft);
}

.controls {
  margin-top: 1rem;
}

.progress-track {
  flex: 1;
  height: 0.5rem;
  border-radius: 999px;
  background: var(--secondary);
  overflow: hidden;
}

.progress-bar {
  width: 11.11%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--primary-glow));
  transition: width 260ms ease;
}

.slide-dense .section-heading h2 {
  font-size: clamp(2rem, 3.35vw, 3.35rem);
}

.slide-dense .bullet-list,
.slide-dense .tool-card p,
.slide-dense .feature-card p,
.slide-dense .metric-label,
.slide-dense .quote-card p {
  font-size: 0.92rem;
}

@media (max-width: 1100px) {
  body {
    overflow: auto;
  }

  .deck {
    min-height: auto;
  }

  .slide,
  .slide.is-active {
    position: relative;
    inset: auto;
    min-height: auto;
    margin-bottom: 1rem;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
  }

  .slide:not(.is-active) {
    display: none;
  }

  .slide-hero,
  .process-grid,
  .process-grid-short,
  .tool-stack,
  .split-layout,
  .three-up,
  .comparison-grid,
  .kpi-grid,
  .metric-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .topbar,
  .controls {
    flex-wrap: wrap;
  }

  .slide {
    padding: 1.5rem;
    border-radius: 1.5rem;
  }

  .hero-copy h1 {
    max-width: none;
  }
}