:root {
  --demo-max: 90rem;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
}

.demo-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: 4rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem max(1rem, calc((100vw - var(--demo-max)) / 2));
  border-bottom: 1px solid var(--cq-border);
  background: color-mix(in srgb, var(--cq-surface) 94%, transparent);
  backdrop-filter: blur(12px);
}

.demo-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--cq-text);
  text-decoration: none;
}

.demo-brand svg {
  width: 2.2rem;
  height: 2.2rem;
  fill: none;
  stroke: var(--cq-accent);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 5;
}

.demo-brand span {
  display: grid;
  line-height: 1.08;
}

.demo-brand strong {
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.demo-brand small {
  color: var(--cq-text-muted);
  font-size: 0.72rem;
}

.demo-source-link,
.demo-reference-links a {
  color: var(--cq-accent);
  font-weight: 650;
  text-underline-offset: 0.2em;
}

.demo-main {
  width: min(calc(100% - 2rem), var(--demo-max));
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4.5rem) 0;
}

.demo-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(18rem, 0.8fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
  margin-bottom: clamp(2.5rem, 6vw, 5rem);
}

.demo-context,
.demo-screen-meta {
  margin-bottom: 0.55rem;
  color: var(--cq-accent);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.demo-intro h1 {
  max-width: 15ch;
  margin-bottom: 1rem;
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.demo-intro > div > p:last-child {
  max-width: 62ch;
  margin-bottom: 0;
  color: var(--cq-text-muted);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
}

.demo-boundary {
  padding: 1.25rem;
  border: 1px solid var(--cq-info-border);
  border-left: 0.3rem solid var(--cq-accent);
  border-radius: var(--cq-radius-md);
  background: var(--cq-info-soft);
}

.demo-boundary > strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.demo-boundary p {
  margin-bottom: 0;
  font-size: 0.9rem;
}

.demo-simulated-label {
  display: inline-block;
  margin-right: 0.55rem;
  padding: 0.13rem 0.38rem;
  border: 1px solid var(--cq-warn-border);
  border-radius: var(--cq-radius-sm);
  background: var(--cq-warn-soft);
  color: var(--cq-warn);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.045em;
  line-height: 1.25;
  text-transform: uppercase;
  vertical-align: 0.08em;
}

.demo-workspace {
  overflow: hidden;
  border: 1px solid var(--cq-border);
  border-radius: var(--cq-radius-lg);
  background: var(--cq-surface);
  box-shadow: var(--cq-shadow-float);
}

.demo-step-nav {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  padding: 0.55rem;
  border-bottom: 1px solid var(--cq-border);
  background: var(--cq-surface-subtle);
}

.demo-step-nav button {
  min-height: 2.2rem;
  flex: 0 0 auto;
  padding: 0.45rem 0.7rem;
  border-color: transparent;
  background: transparent;
  color: var(--cq-text-muted);
  font-size: 0.82rem;
}

.demo-step-nav button:hover,
.demo-step-nav button[aria-selected='true'] {
  border-color: color-mix(in srgb, var(--cq-accent) 24%, transparent);
  background: var(--cq-accent-soft);
  color: var(--cq-accent-hover);
}

.demo-stage {
  display: grid;
  grid-template-columns: minmax(17rem, 0.32fr) minmax(0, 1fr);
  min-height: 42rem;
}

.demo-copy {
  display: flex;
  flex-direction: column;
  padding: clamp(1.25rem, 3vw, 2.2rem);
  border-right: 1px solid var(--cq-border);
}

.demo-copy h2 {
  margin-bottom: 0.65rem;
  font-size: clamp(1.5rem, 2.6vw, 2.25rem);
  letter-spacing: -0.035em;
}

.demo-copy > p:not(.demo-screen-meta) {
  color: var(--cq-text-muted);
}

.demo-actions {
  margin-top: 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--cq-border);
}

.demo-actions h3 {
  color: var(--cq-text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.demo-actions ul {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.demo-actions li {
  font-size: 0.88rem;
}

.demo-pager {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.6rem;
  align-items: center;
  margin-top: auto;
  padding-top: 2rem;
}

.demo-pager button {
  min-width: 0;
  padding-inline: 0.7rem;
  font-size: 0.82rem;
}

.demo-pager button:last-child {
  justify-self: end;
}

.demo-pager span {
  color: var(--cq-text-muted);
  font-size: 0.78rem;
  white-space: nowrap;
}

.demo-secondary {
  border-color: var(--cq-border-strong);
  background: var(--cq-surface);
  color: var(--cq-text);
}

.demo-secondary:hover:not(:disabled) {
  border-color: var(--cq-accent);
  background: var(--cq-accent-soft);
  color: var(--cq-accent-hover);
}

.demo-capture {
  min-width: 0;
  margin: 0;
  background: var(--cq-bg);
}

.demo-capture-bar {
  display: flex;
  min-height: 2.65rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--cq-border);
  background: var(--cq-surface);
  color: var(--cq-text-muted);
  font-size: 0.74rem;
}

.demo-capture-bar > span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.demo-capture-bar > span > span {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--cq-ok);
}

.demo-capture-bar strong {
  color: var(--cq-warn);
}

.demo-capture img {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: none;
  user-select: none;
}

.demo-capture figcaption {
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--cq-border);
  background: var(--cq-surface);
  color: var(--cq-text-muted);
  font-size: 0.75rem;
}

.demo-notes {
  display: grid;
  grid-template-columns: 0.6fr 1fr;
  gap: 1rem clamp(2rem, 6vw, 6rem);
  padding: clamp(3rem, 7vw, 6rem) 0 1rem;
}

.demo-notes h2 {
  max-width: 14ch;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  letter-spacing: -0.035em;
}

.demo-notes p {
  color: var(--cq-text-muted);
}

.demo-reference-links {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 0;
}

.demo-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem max(1rem, calc((100vw - var(--demo-max)) / 2));
  border-top: 1px solid var(--cq-border);
  color: var(--cq-text-muted);
  font-size: 0.75rem;
}

@media (max-width: 62rem) {
  .demo-intro,
  .demo-stage,
  .demo-notes {
    grid-template-columns: 1fr;
  }

  .demo-copy {
    border-right: 0;
    border-bottom: 1px solid var(--cq-border);
  }

  .demo-pager {
    margin-top: 1rem;
  }

  .demo-reference-links {
    grid-column: 1;
  }
}

@media (max-width: 38rem) {
  .demo-source-link {
    font-size: 0.78rem;
  }

  .demo-main {
    width: min(calc(100% - 1rem), var(--demo-max));
    padding-top: 2rem;
  }

  .demo-intro h1 {
    font-size: 2.45rem;
  }

  .demo-capture-bar {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.2rem;
  }

  .demo-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}