.guide-main {
  position: relative;
}

.guide-hero {
  padding-top: 76px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--color-border);
}

.guide-hero-inner {
  max-width: 940px;
}

.guide-hero h1 {
  max-width: 820px;
  margin-bottom: 22px;
}

.guide-lead {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 18px;
}

.guide-facts {
  margin-top: 26px;
}

.guide-hero-actions {
  margin-top: 28px;
}

.guide-main > .toc-tabs {
  top: 0;
}

.guide-flow {
  padding-top: 28px;
  padding-bottom: var(--section-space);
}

.guide-stage {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 38px;
  padding-top: 76px;
  padding-bottom: 76px;
  border-bottom: 1px solid var(--color-border);
}

.guide-stage:last-child {
  border-bottom: 0;
}

.stage-mark {
  position: sticky;
  top: var(--toc-offset);
  align-self: start;
  border-top: 2px solid var(--color-accent);
  padding-top: 10px;
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.stage-content {
  width: 100%;
  max-width: 820px;
}

.stage-content h2 {
  margin-bottom: 24px;
  font-size: clamp(32px, 4vw, 46px);
}

.stage-content h3 {
  font-size: 22px;
}

.stage-content > p {
  color: var(--color-text-muted);
}

.stage-content a:not(.button) {
  color: var(--color-accent-strong);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.stage-content .callout {
  margin-top: 26px;
  margin-bottom: 28px;
}

.stage-content pre {
  margin-top: 18px;
  margin-bottom: 22px;
}

.stage-content pre code {
  color: var(--color-accent-strong);
}

.stage-action {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  margin-top: 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  padding: 20px;
}

.stage-action p {
  margin-bottom: 0;
}

.stage-action-title {
  color: var(--color-text);
  font-weight: 600;
}

.stage-action-title + p {
  margin-top: 4px;
  color: var(--color-text-muted);
  font-size: 14px;
}

.platform-guide {
  margin-top: 34px;
  margin-bottom: 32px;
  border-top: 1px solid var(--color-border);
}

.platform-step {
  display: grid;
  grid-template-columns: 126px minmax(0, 1fr);
  column-gap: 28px;
  padding-top: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--color-border);
}

.platform-step h3,
.platform-step p:not(.platform-code) {
  grid-column: 2;
}

.platform-step h3 {
  margin-bottom: 14px;
}

.platform-step p:last-child {
  margin-bottom: 0;
}

.platform-code {
  grid-column: 1;
  grid-row: 1 / span 3;
  margin-bottom: 0;
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

@media (max-width: 768px) {
  .guide-hero {
    padding-top: 56px;
    padding-bottom: 50px;
  }

  .guide-lead {
    font-size: 16px;
  }

  .guide-stage {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .stage-mark {
    position: static;
    width: 72px;
  }

  .platform-step {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .platform-step h3,
  .platform-step p:not(.platform-code),
  .platform-code {
    grid-column: 1;
    grid-row: auto;
  }

  .platform-code {
    margin-bottom: 8px;
  }
}

@media (max-width: 560px) {
  .guide-hero-actions .button {
    width: 100%;
  }

  .stage-action {
    grid-template-columns: 1fr;
  }

  .stage-action .button {
    width: 100%;
  }

  .stage-content h2 {
    font-size: 30px;
  }
}