:root {
  --stream-console-max: 31rem;
  --stream-table-min: 58rem;
  --stream-node-size: 7.5rem;
  --stream-line-min: 2rem;
  --stream-step-mark: 2.2rem;
  --stream-hero-space: 5rem;
  --stream-card-gap: 1rem;
  --stream-border-strong: 2px;
}

.stream-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
}

.stream-hero::before {
  content: "";
  position: absolute;
  inset: auto auto -45% -12%;
  width: 44rem;
  height: 44rem;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, var(--color-panel-raised), var(--color-transparent) 68%);
  opacity: .62;
  pointer-events: none;
}

.stream-hero-inner {
  position: relative;
  display: grid;
  min-height: 38rem;
  grid-template-columns: minmax(0, 1.15fr) minmax(22rem, .85fr);
  align-items: center;
  gap: var(--stream-hero-space);
  padding-top: calc(var(--section-space) * .8);
  padding-bottom: calc(var(--section-space) * .8);
}

.stream-hero-copy {
  position: relative;
  z-index: 1;
}

.stream-hero h1 {
  max-width: 12ch;
  margin: 1.25rem 0 1.2rem;
  font-size: clamp(3.25rem, 5vw, 4.5rem);
}

.stream-facts {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.8rem;
}

.stream-facts span {
  display: inline-flex;
  align-items: center;
  min-height: 2.35rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text-muted);
  padding: .4rem .8rem;
  font-size: .82rem;
}

.stream-console {
  position: relative;
  width: 100%;
  max-width: var(--stream-console-max);
  justify-self: end;
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
  box-shadow: var(--shadow-board);
  padding: 1.35rem;
}

.stream-console::after {
  content: "";
  position: absolute;
  right: -4rem;
  bottom: -6rem;
  width: 12rem;
  height: 12rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  pointer-events: none;
}

.stream-console-head {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  font-weight: 700;
}

.stream-route {
  display: flex;
  align-items: center;
  margin-block: 1.5rem;
}

.stream-route-node {
  display: grid;
  min-height: 4.2rem;
  width: var(--stream-node-size);
  flex: 0 1 var(--stream-node-size);
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-bg);
  color: var(--color-text-muted);
  padding: .5rem;
  text-align: center;
  font-size: .78rem;
}

.stream-route-node.is-active {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-text);
}

.stream-route-line {
  min-width: var(--stream-line-min);
  flex: 1 1 auto;
  border-top: 1px dashed var(--color-border);
}

.stream-slips {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .6rem;
}

.stream-slips span {
  display: flex;
  min-height: 2.8rem;
  align-items: center;
  border-left: var(--stream-border-strong) solid var(--color-success);
  border-radius: var(--radius-xs);
  background: var(--color-panel-raised);
  color: var(--color-text);
  padding: .55rem .7rem;
  font-size: .72rem;
  font-weight: 750;
  letter-spacing: .04em;
}

.stream-console p {
  position: relative;
  z-index: 1;
  margin: 1.1rem 0 0;
  color: var(--color-text-muted);
  font-size: .82rem;
}

.stream-toc-wrap {
  position: relative;
  z-index: 30;
  padding-top: 1.25rem;
}

.stream-article .section-heading {
  margin-bottom: 1.7rem;
}

.stream-article .section-heading h2 {
  margin-top: .8rem;
}

.support-table {
  min-width: var(--stream-table-min);
}

.table-note {
  max-width: var(--reading-max);
  margin: 1rem auto 0;
  color: var(--color-text-muted);
  font-size: .85rem;
}

.stream-compare {
  margin-top: 1.8rem;
}

.stream-compare .panel {
  border-top: var(--stream-border-strong) solid var(--color-success);
}

.stream-compare p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.stream-steps {
  display: grid;
  gap: var(--stream-card-gap);
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: stream-step;
}

.stream-steps li {
  position: relative;
  min-height: 7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-panel);
  padding: 1.2rem 1.2rem 1.2rem 4.4rem;
  counter-increment: stream-step;
}

.stream-steps li::before {
  content: counter(stream-step);
  position: absolute;
  top: 1.2rem;
  left: 1.15rem;
  display: grid;
  width: var(--stream-step-mark);
  height: var(--stream-step-mark);
  place-items: center;
  border-radius: var(--radius-s);
  background: var(--color-accent);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 750;
}

.stream-steps h3 {
  margin-bottom: .45rem;
}

.stream-steps p {
  margin-bottom: 0;
}

.error-grid {
  margin-top: 1.5rem;
}

.error-grid .card {
  border-top: var(--stream-border-strong) solid var(--color-warning);
}

.error-grid p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.next-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--stream-card-gap);
  margin-top: 2rem;
}

.next-link {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.next-link:hover {
  border-color: var(--color-accent-soft);
  transform: translateY(-2px);
}

.next-link-label {
  color: var(--color-accent-soft);
  font-size: .76rem;
  font-weight: 750;
  letter-spacing: .08em;
}

.next-link strong {
  color: var(--color-text);
  font-size: 1.05rem;
}

.next-link > span:last-child {
  color: var(--color-text-muted);
  font-size: .85rem;
}

@media (max-width: 960px) {
  .stream-hero-inner {
    min-height: 0;
    grid-template-columns: minmax(0, 1fr);
    gap: 2.5rem;
  }

  .stream-console {
    max-width: 42rem;
    justify-self: start;
  }
}

@media (max-width: 768px) {
  .stream-hero h1 {
    max-width: 11ch;
    font-size: clamp(2rem, 10vw, 2.5rem);
  }

  .stream-toc-wrap {
    padding-inline: 0;
  }

  .next-links {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .stream-hero-inner {
    gap: 2rem;
    padding-top: 2.5rem;
    padding-bottom: 3rem;
  }

  .stream-console {
    padding: 1rem;
  }

  .stream-route {
    align-items: stretch;
    flex-direction: column;
    gap: .45rem;
  }

  .stream-route-node {
    width: 100%;
    min-height: 3rem;
    flex-basis: auto;
  }

  .stream-route-line {
    min-width: 0;
    min-height: .8rem;
    flex: 0 0 auto;
    border-top: 0;
    border-left: 1px dashed var(--color-border);
    margin-left: 50%;
  }

  .stream-slips {
    grid-template-columns: minmax(0, 1fr);
  }

  .stream-steps li {
    padding: 4.2rem 1rem 1rem;
  }

  .stream-steps li::before {
    top: 1rem;
    left: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .next-link {
    transition: none;
  }

  .next-link:hover {
    transform: none;
  }
}