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

.stream-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-accent) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-accent) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.28;
  pointer-events: none;
}

.stream-hero-grid {
  position: relative;
  min-height: 650px;
  padding-top: 76px;
  padding-bottom: 76px;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(480px, 1.08fr);
  align-items: center;
  gap: 76px;
}

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

.stream-hero-copy .badge {
  margin-bottom: 24px;
}

.stream-hero-copy .lead strong {
  color: var(--color-ink);
}

.stream-diagnostic {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border: 1px solid var(--color-terminal-border);
  border-radius: var(--radius-md);
  background: var(--color-terminal);
  color: var(--color-terminal-text);
  box-shadow: var(--shadow-deep);
  transform: rotate(0.5deg);
}

.stream-diagnostic::after {
  content: "";
  position: absolute;
  inset: 12px -12px -12px 12px;
  z-index: -1;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-panel-soft);
}

.diagnostic-head {
  min-height: 54px;
  padding: 0 18px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--color-terminal-border);
  background: var(--color-terminal-bar);
  color: var(--color-terminal-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 760;
}

.diagnostic-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-success);
}

.diagnostic-body {
  padding: 26px;
}

.diagnostic-step {
  min-width: 0;
  padding: 17px;
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 16px;
  border: 1px solid var(--color-terminal-border);
  border-radius: var(--radius-sm);
  background: var(--color-terminal-bar);
}

.diagnostic-step strong {
  color: var(--color-terminal-text);
  font-size: 15px;
}

.diagnostic-step p {
  margin: 4px 0 0;
  color: var(--color-terminal-muted);
  font-size: 12px;
  line-height: 1.6;
}

.diagnostic-key {
  align-self: start;
  padding: 5px 7px;
  border: 1px solid var(--color-terminal-border);
  border-radius: var(--radius-xs);
  color: var(--color-terminal-blue);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  text-align: center;
}

.diagnostic-link {
  width: 1px;
  height: 24px;
  margin-inline: 41px;
  border-left: 1px dashed var(--color-terminal-blue);
}

.diagnostic-result {
  margin-top: 22px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--color-terminal-border);
  border-radius: var(--radius-sm);
  color: var(--color-terminal-green);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 760;
}

.diagnostic-result svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.stream-toc-wrap {
  position: relative;
  z-index: 4;
  padding-top: 24px;
}

.stream-split {
  display: grid;
  grid-template-columns: minmax(280px, 0.74fr) minmax(0, 1.26fr);
  align-items: start;
  gap: 80px;
}

.stream-split .section-head {
  position: sticky;
  top: calc(var(--toc-offset) + 24px);
  margin-bottom: 0;
}

.stream-prose {
  font-size: 17px;
}

.stream-prose p {
  color: var(--color-ink-muted);
}

.stream-prose p:first-child {
  color: var(--color-ink);
  font-size: 19px;
}

.stream-table {
  min-width: 900px;
}

.verification-state {
  max-width: 100%;
  padding: 4px 8px;
  display: inline-flex;
  overflow: hidden;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xs);
  background: var(--wash-accent);
  color: var(--color-accent-deep);
  font-size: 12px;
  font-weight: 780;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.matrix-notes {
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 18px;
}

.matrix-note {
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.matrix-note > .mono {
  color: var(--color-accent-deep);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.matrix-note h3 {
  margin-top: 14px;
  font-size: 23px;
}

.matrix-note p {
  margin-bottom: 0;
  color: var(--color-ink-muted);
}

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

.ip-pane {
  position: relative;
  padding: 32px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.ip-pane::after {
  content: "";
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 120px;
  height: 120px;
  border: 1px dashed var(--border-accent);
  border-radius: var(--radius-pill);
}

.ip-pane-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.ip-pane-head h3 {
  margin: 0;
}

.ip-mark {
  min-width: 42px;
  min-height: 42px;
  padding: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xs);
  background: var(--wash-accent);
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 850;
}

.ip-pane p,
.ip-pane li {
  color: var(--color-ink-muted);
}

.ip-pane p {
  margin-top: 20px;
}

.ip-pane ul {
  margin-bottom: 0;
}

.quality-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  align-items: start;
  gap: 76px;
}

.quality-layout .section-head {
  margin-bottom: 0;
}

.quality-stack {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-border);
}

.quality-row {
  padding: 26px;
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 18px;
  background: var(--color-panel);
}

.quality-index {
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 820;
  letter-spacing: 0.08em;
}

.quality-row h3 {
  font-size: 22px;
}

.quality-row p {
  margin-bottom: 0;
  color: var(--color-ink-muted);
}

.workflow-list {
  margin: 0;
  padding: 0;
  display: grid;
  counter-reset: stream-step;
  list-style: none;
}

.workflow-list > li {
  position: relative;
  min-height: 132px;
  padding: 0 0 34px 96px;
  counter-increment: stream-step;
}

.workflow-list > li::before {
  content: counter(stream-step);
  position: absolute;
  top: 0;
  left: 0;
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 850;
  box-shadow: var(--shadow-soft);
}

.workflow-list > li::after {
  content: "";
  position: absolute;
  top: 64px;
  bottom: 6px;
  left: 29px;
  border-left: 1px dashed var(--color-border-strong);
}

.workflow-list > li:last-child::after {
  display: none;
}

.workflow-copy {
  padding: 0 0 28px;
  border-bottom: 1px solid var(--color-border);
}

.workflow-copy h3 {
  font-size: 24px;
}

.workflow-copy p {
  max-width: 850px;
  margin-bottom: 0;
  color: var(--color-ink-muted);
}

.error-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1.3fr);
  align-items: start;
  gap: 72px;
}

.error-layout .section-head {
  margin-bottom: 0;
}

.devices-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.76fr) minmax(0, 1.24fr);
  align-items: start;
  gap: 72px;
}

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

.device-guidance article {
  padding: 25px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.device-guidance h3 {
  font-size: 20px;
}

.device-guidance p {
  margin-bottom: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
}

.next-links {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  align-items: start;
  gap: 72px;
}

.next-links .section-head {
  margin-bottom: 0;
}

.next-link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.next-link-card {
  min-height: 250px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

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

.next-link-card > .mono {
  color: var(--color-accent-deep);
  font-size: 11px;
  font-weight: 820;
  letter-spacing: 0.1em;
}

.next-link-card h3 {
  margin-top: 22px;
  font-size: 24px;
}

.next-link-card p {
  color: var(--color-ink-muted);
}

.next-link-card strong {
  margin-top: auto;
  color: var(--color-accent-deep);
}

@media (max-width: 1050px) {
  .stream-hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 48px;
  }

  .stream-diagnostic {
    width: min(720px, 100%);
    transform: none;
  }

  .stream-split,
  .quality-layout,
  .error-layout,
  .devices-layout,
  .next-links {
    grid-template-columns: minmax(0, 1fr);
    gap: 38px;
  }

  .stream-split .section-head {
    position: static;
  }

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

@media (max-width: 768px) {
  .stream-hero::before {
    background-size: 36px 36px;
  }

  .stream-hero-grid {
    min-height: auto;
    padding-top: 52px;
    padding-bottom: 58px;
  }

  .stream-diagnostic::after {
    display: none;
  }

  .ip-compare,
  .device-guidance,
  .next-link-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .device-guidance {
    border-left: 0;
  }

  .device-guidance article {
    border-left: 1px solid var(--color-border);
  }

  .quality-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 9px;
  }
}

@media (max-width: 640px) {
  .diagnostic-body {
    padding: 16px;
  }

  .diagnostic-step {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .diagnostic-key {
    justify-self: start;
  }

  .diagnostic-link {
    margin-inline: 24px;
  }

  .diagnostic-result {
    align-items: flex-start;
  }

  .stream-prose {
    font-size: 15px;
  }

  .stream-prose p:first-child {
    font-size: 17px;
  }

  .ip-pane,
  .matrix-note,
  .next-link-card {
    padding: 22px;
  }

  .workflow-list > li {
    min-height: 0;
    padding-left: 64px;
  }

  .workflow-list > li::before {
    width: 44px;
    height: 44px;
    font-size: 15px;
  }

  .workflow-list > li::after {
    top: 50px;
    left: 22px;
  }

  .workflow-copy h3 {
    font-size: 21px;
  }

  .quality-row {
    padding: 21px;
  }

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