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

.stream-hero__layout {
  display: grid;
  min-height: calc(100svh - var(--header-height));
  grid-template-columns: minmax(0, 0.96fr) minmax(440px, 1.04fr);
  gap: 72px;
  align-items: center;
  padding-top: 68px;
  padding-bottom: 68px;
}

.stream-hero__copy {
  min-width: 0;
}

.stream-hero__copy h1 {
  margin-top: 22px;
  margin-bottom: 26px;
}

.stream-hero__copy .cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}

.stream-hero__copy .lead {
  margin-bottom: 24px;
  font-size: 16px;
}

.stream-hero__copy .lead strong {
  color: var(--color-ink);
  font-weight: 650;
}

.stream-diagram {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-canvas);
}

.stream-diagram__head {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-inline: 18px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-ink-muted);
  background: var(--color-panel);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.07em;
}

.stream-diagram__figure {
  width: 100%;
  height: auto;
}

.stream-diagram figcaption {
  padding: 15px 18px 18px;
  border-top: 1px solid var(--color-line);
  color: var(--color-ink-muted);
  font-size: 12px;
  line-height: 1.65;
}

.section-heading {
  display: grid;
  max-width: 780px;
  gap: 18px;
  margin-bottom: 44px;
}

.section-heading > p:last-child {
  color: var(--color-ink-muted);
  font-size: 17px;
  line-height: 1.85;
}

.stream-panel {
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-panel);
}

.stream-layers {
  border-top: 1px solid var(--color-line);
}

.stream-layer {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 26px;
  padding-top: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--color-line);
}

.stream-layer__index {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
}

.stream-layer h3 {
  font-size: 28px;
}

.stream-layer p {
  margin-top: 10px;
  color: var(--color-ink-muted);
  line-height: 1.85;
}

.stream-layers + .callout {
  margin-top: 34px;
}

.table-note {
  max-width: 78ch;
  margin-top: 20px;
  color: var(--color-ink-muted);
  font-size: 14px;
}

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

.address-card {
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
  padding: 30px;
  background: var(--color-canvas);
}

.address-card__label,
.quality-notes__key {
  color: var(--color-signal);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.address-card h3 {
  margin-top: 16px;
}

.address-card p {
  margin-top: 14px;
  color: var(--color-ink-muted);
  line-height: 1.8;
}

.address-card ul {
  display: grid;
  gap: 9px;
  margin-top: 22px;
  list-style: none;
  color: var(--color-ink-muted);
  font-size: 14px;
}

.address-card li {
  display: flex;
  gap: 9px;
}

.address-card li::before {
  flex-shrink: 0;
  content: "—";
  color: var(--color-signal);
}

.address-grid + .callout {
  margin-top: 28px;
}

.quality-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.quality-notes article {
  min-width: 0;
  padding: 30px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-canvas);
}

.quality-notes h3 {
  margin-top: 14px;
  font-size: 27px;
}

.quality-notes p {
  margin-top: 12px;
  color: var(--color-ink-muted);
  line-height: 1.8;
}

.quality-summary {
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
  color: var(--color-ink-muted);
  background: var(--color-canvas);
}

#errors .callout {
  max-width: 850px;
  margin-top: 28px;
}

.check-sequence {
  display: grid;
  border-top: 1px solid var(--color-line);
  list-style: none;
  counter-reset: stream-check;
}

.check-sequence li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(190px, 0.7fr) minmax(0, 1.3fr);
  gap: 42px;
  padding: 30px 0 30px 66px;
  border-bottom: 1px solid var(--color-line);
  counter-increment: stream-check;
}

.check-sequence li::before {
  position: absolute;
  top: 34px;
  left: 0;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  content: counter(stream-check);
  border: 1px solid var(--color-signal);
  border-radius: var(--radius-pill);
  color: var(--color-signal);
  font-family: var(--font-mono);
  font-size: 12px;
}

.check-sequence h3 {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 650;
}

.check-sequence p {
  color: var(--color-ink-muted);
  line-height: 1.8;
}

.stream-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 34px;
  margin-top: 54px;
  align-items: end;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-medium);
  padding: 38px;
  background: var(--color-canvas);
}

.stream-next h2 {
  margin-top: 14px;
  font-size: clamp(30px, 4vw, 44px);
}

.stream-next p:not(.kicker) {
  max-width: 62ch;
  margin-top: 14px;
  color: var(--color-ink-muted);
}

.stream-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

@media (max-width: 980px) {
  .stream-hero__layout {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .stream-diagram {
    width: 100%;
    max-width: 620px;
    margin-inline: auto;
  }

  .stream-next {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .stream-next__actions {
    justify-content: flex-start;
  }
}

@media (max-width: 720px) {
  .stream-hero__layout {
    gap: 38px;
    padding-top: 46px;
    padding-bottom: 48px;
  }

  .stream-hero__copy h1 {
    margin-top: 18px;
    margin-bottom: 22px;
  }

  .stream-hero__copy .cta-row .btn-main,
  .stream-hero__copy .cta-row .btn-sub {
    flex: 1 1 140px;
  }

  .section-heading {
    margin-bottom: 34px;
  }

  .section-heading > p:last-child {
    font-size: 16px;
  }

  .stream-layer {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .address-grid,
  .quality-notes {
    grid-template-columns: 1fr;
  }

  .check-sequence li {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-left: 54px;
  }

  .check-sequence li::before {
    top: 31px;
  }

  .stream-next {
    padding: 28px;
  }
}

@media (max-width: 480px) {
  .stream-diagram__head {
    padding-inline: 12px;
    font-size: 9px;
  }

  .stream-diagram figcaption {
    padding-inline: 14px;
  }

  .address-card,
  .quality-notes article {
    padding: 24px;
  }

  .stream-next {
    padding: 24px;
  }

  .stream-next__actions {
    display: grid;
    width: 100%;
  }

  .stream-next__actions .btn-dark,
  .stream-next__actions .btn-sub {
    width: 100%;
  }
}