.demo-page main {
  overflow: hidden;
}

.demo-hero,
.demo-shell {
  width: min(calc(100% - 4rem), var(--max));
  margin-inline: auto;
}

.demo-hero {
  display: grid;
  grid-template-columns: minmax(17rem, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: end;
  padding-block: clamp(4.5rem, 8vw, 6rem) clamp(3.5rem, 6vw, 5rem);
}

.demo-brand img {
  width: min(22rem, 100%);
  height: auto;
}

.demo-intro h1 {
  max-width: 18ch;
  margin-bottom: 1.25rem;
  font-size: clamp(3.2rem, 5.4vw, 5.8rem);
  line-height: 0.96;
}

.demo-intro p {
  max-width: 34rem;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: clamp(1.02rem, 1.25vw, 1.18rem);
  line-height: 1.55;
}

.demo-shell {
  --demo-progress: 0;
  margin-bottom: clamp(6rem, 9vw, 9rem);
  border: 1px solid var(--line-strong);
  background: color-mix(in srgb, var(--surface) 88%, var(--page));
  box-shadow: 0 34px 100px color-mix(in srgb, var(--page) 72%, transparent);
}

.demo-toolbar {
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding: 0.75rem 1rem 0.75rem 1.25rem;
  border-bottom: 1px solid var(--line-strong);
}

.demo-playback {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 650;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.demo-playback > span:first-child {
  color: var(--accent);
}

.demo-progress {
  height: 3px;
  overflow: hidden;
  background: var(--surface-strong);
}

.demo-progress-fill {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transform: scaleX(var(--demo-progress));
  transform-origin: left center;
}

.demo-layout {
  min-width: 0;
}

.demo-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-bottom: 1px solid var(--line-strong);
}

.demo-step {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 8rem;
  gap: 0.45rem;
  align-content: center;
  padding: 1.25rem clamp(1rem, 2.2vw, 2rem);
  border: 0;
  color: var(--ink-soft);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: color 180ms ease, background-color 180ms ease;
}

.demo-step + .demo-step {
  border-left: 1px solid var(--line-strong);
}

.demo-step::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 3px;
  content: "";
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

.demo-step:hover,
.demo-step[aria-current="step"] {
  color: var(--ink);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.demo-step[aria-current="step"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.demo-step-meta {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.61rem;
  letter-spacing: 0.04em;
}

.demo-step strong {
  color: inherit;
  font-size: clamp(0.98rem, 1.3vw, 1.12rem);
  letter-spacing: -0.02em;
}

.demo-step > span:last-child {
  overflow: hidden;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.demo-stage {
  min-width: 0;
  padding: clamp(1rem, 2.6vw, 2.4rem);
}

.demo-panel[hidden] {
  display: none;
}

.demo-panel:not([hidden]) {
  animation: demo-panel-enter 420ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.demo-panel figure {
  margin: 0;
  padding: clamp(0.45rem, 0.7vw, 0.7rem);
  border: 1px solid var(--line-strong);
  background: #00170c;
  box-shadow: 0 24px 64px rgba(0, 25, 13, 0.24);
  cursor: zoom-in;
}

.demo-panel figure img {
  display: block;
  width: 100%;
  height: min(62vh, 43rem);
  border: 0;
  object-fit: contain;
  object-position: center;
}

.demo-caption {
  max-width: 48rem;
  padding: clamp(1.75rem, 3vw, 2.7rem) 0 0;
}

.demo-caption h2 {
  max-width: 18ch;
  margin-bottom: 0.8rem;
  font-size: clamp(2rem, 3vw, 3.25rem);
  line-height: 1;
}

.demo-caption p {
  max-width: 42rem;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
  line-height: 1.6;
}

.demo-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
}

.demo-controls .button {
  min-width: 0;
  min-height: 2.55rem;
  padding: 0.68rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.demo-controls .button:disabled {
  color: var(--muted);
  border-color: var(--line);
  background: transparent;
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.demo-live {
  position: absolute;
  overflow: hidden;
  width: 1px;
  height: 1px;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.demo-noscript {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.demo-underlay {
  display: block;
  max-width: 64rem;
  margin-inline: auto;
  border-top: 1px solid var(--line-strong);
}

.demo-underlay h2 {
  max-width: 13ch;
  margin-bottom: 2rem;
  font-size: clamp(2.8rem, 5vw, 5rem);
  line-height: 0.98;
}

.demo-underlay > div:last-child > p {
  max-width: 42rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.65;
}

.demo-underlay-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  align-items: center;
  margin-top: 2rem;
}

@keyframes demo-panel-enter {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .demo-hero,
  .demo-shell {
    width: min(calc(100% - 2rem), var(--max));
  }

  .demo-hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-block: 4.5rem 3.5rem;
  }

  .demo-intro h1 {
    font-size: clamp(3rem, 10vw, 4.75rem);
  }

  .demo-toolbar {
    align-items: flex-start;
  }

  .demo-steps {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x proximity;
  }

  .demo-step {
    min-width: 15rem;
    min-height: 7.5rem;
    scroll-snap-align: start;
  }
}

@media (max-width: 620px) {
  .demo-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .demo-controls {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
  }

  .demo-controls .button {
    padding-inline: 0.6rem;
  }

  .demo-panel figure img {
    height: auto;
  }

  .demo-caption h2 {
    font-size: clamp(2rem, 9vw, 2.8rem);
  }

  .demo-underlay-links {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .demo-panel:not([hidden]) {
    animation: none;
  }

  .demo-progress-fill,
  .demo-step::after {
    transition: none;
  }
}