.tutorial-hero {
  position: relative;
  overflow: clip;
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px),
    var(--color-page);
  background-size: 38px 38px;
}

.tutorial-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: var(--color-panel-glass);
  mask-image: linear-gradient(to bottom, var(--color-text), transparent);
}

.tutorial-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  align-items: center;
  gap: clamp(36px, 7vw, 90px);
}

.tutorial-heading {
  max-width: 760px;
}

.tutorial-heading h1 {
  margin-top: 16px;
  margin-bottom: 18px;
}

.tutorial-heading h1 span {
  display: inline-block;
}

.tutorial-heading .lead {
  max-width: 690px;
  margin-bottom: 24px;
}

.setup-map {
  overflow: clip;
  box-shadow: var(--shadow-device);
}

.setup-map-head {
  min-height: 54px;
  padding-inline: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-muted);
  background: var(--color-panel-soft);
  font-size: 11px;
  font-weight: 760;
}

.setup-map-list {
  margin: 0;
  padding: 18px;
  display: grid;
  gap: 8px;
  list-style: none;
  counter-reset: setup-flow;
}

.setup-map-list li {
  min-height: 52px;
  padding: 10px 12px;
  display: grid;
  grid-template-columns: minmax(70px, 0.35fr) minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel);
  counter-increment: setup-flow;
}

.setup-map-list li::before {
  content: counter(setup-flow);
  width: 24px;
  height: 24px;
  grid-column: 1;
  grid-row: 1;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  color: var(--color-brand-dark);
  background: var(--color-brand-wash);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
}

.setup-map-list li span {
  grid-column: 1;
  grid-row: 1;
  padding-left: 34px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 700;
}

.setup-map-list li strong {
  grid-column: 2;
  color: var(--color-text);
  font-size: 13px;
}

.setup-map-note {
  margin: 0;
  padding: 15px 18px;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  background: var(--color-panel-soft);
  font-size: 12px;
}

.tutorial-document {
  padding-top: 38px;
}

.tutorial-document > .callout {
  max-width: 980px;
  margin-top: 28px;
  margin-right: auto;
  margin-left: auto;
}

.tutorial-flow {
  max-width: 1080px;
  margin-inline: auto;
  padding-top: 18px;
}

.guide-stage {
  position: relative;
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(56px, 8vw, 96px);
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  border-bottom: 1px solid var(--color-border);
}

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

.stage-marker {
  position: sticky;
  top: calc(var(--toc-top) + var(--toc-height) + 24px);
  height: fit-content;
  padding-top: 8px;
  color: var(--color-faint);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.stage-marker::after {
  content: "";
  width: 44px;
  height: 2px;
  margin-top: 12px;
  display: block;
  background: var(--color-brand);
}

.stage-copy {
  min-width: 0;
}

.stage-copy > h2 {
  margin-top: 14px;
}

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

.stage-copy > p strong,
.stage-copy li strong {
  color: var(--color-text);
}

.stage-action {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.stage-action .muted {
  font-size: 13px;
}

.text-link {
  color: var(--color-action);
  font-weight: 740;
}

.text-link:hover {
  color: var(--color-action-dark);
}

.platform-instructions {
  margin-top: 32px;
  display: grid;
  gap: 14px;
}

.platform-instruction {
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.platform-instruction-head {
  margin-bottom: 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
}

.platform-instruction h3 {
  margin-bottom: 0;
  font-size: clamp(21px, 2.4vw, 27px);
}

.platform-code {
  color: var(--color-brand-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.platform-instruction p {
  color: var(--color-muted);
}

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

.verification-panel {
  margin-top: 28px;
  padding: 20px;
}

.verification-panel strong {
  display: block;
  margin-bottom: 5px;
  color: var(--color-text);
}

.verification-panel p {
  margin-bottom: 0;
  color: var(--color-muted);
}

@media (max-width: 920px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
  }

  .tutorial-heading {
    max-width: 780px;
  }

  .setup-map {
    max-width: 720px;
  }

  .guide-stage {
    grid-template-columns: 110px minmax(0, 1fr);
  }
}

@media (max-width: 768px) {
  .tutorial-document {
    padding-top: 24px;
  }

  .guide-stage {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .stage-marker {
    position: static;
    padding-top: 0;
  }

  .stage-marker::after {
    width: 32px;
    margin-top: 8px;
  }
}

@media (max-width: 640px) {
  .tutorial-hero-grid {
    gap: 30px;
  }

  .tutorial-heading .button-row {
    width: 100%;
  }

  .setup-map-head {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .setup-map-list {
    padding: 12px;
  }

  .setup-map-list li {
    grid-template-columns: 1fr;
  }

  .setup-map-list li::before {
    grid-column: 1;
  }

  .setup-map-list li span {
    grid-column: 1;
  }

  .setup-map-list li strong {
    grid-column: 1;
    padding-left: 34px;
  }

  .tutorial-document > .callout {
    margin-top: 20px;
  }

  .guide-stage {
    padding-top: 54px;
    padding-bottom: 54px;
  }

  .stage-action {
    align-items: stretch;
    flex-direction: column;
  }

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

  .platform-instruction {
    padding: 19px;
  }
}