.tutorial-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(118deg, var(--color-accent-05) 0%, var(--color-accent-02) 38%, var(--color-transparent) 64%),
    var(--color-bg);
}

.tutorial-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, .55fr);
  gap: 72px;
  align-items: end;
  padding-top: 72px;
  padding-bottom: 72px;
}

.tutorial-hero-copy {
  max-width: 820px;
}

.tutorial-hero h1 {
  max-width: 760px;
  margin: 20px 0 22px;
}

.tutorial-hero-lede {
  max-width: 680px;
  margin-bottom: 28px;
  color: var(--color-muted);
  font-family: var(--font-serif);
  font-size: 21px;
  line-height: 1.65;
}

.tutorial-hero-index {
  padding: 26px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel-muted);
}

.tutorial-hero-index .mono {
  display: block;
  margin-bottom: 18px;
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
}

.tutorial-hero-index p {
  margin-bottom: 20px;
  font-size: 18px;
  line-height: 1.65;
}

.tutorial-hero-index a {
  color: var(--color-accent);
  font-weight: 700;
}

.tutorial-document {
  position: relative;
  padding-top: 48px;
  padding-bottom: var(--section-space);
}

.tutorial-document > .toc-tabs {
  margin-right: auto;
  margin-left: auto;
}

.tutorial-intro {
  max-width: 960px;
  margin-right: auto;
  margin-left: auto;
  padding-top: 40px;
  padding-bottom: 76px;
}

.tutorial-intro p {
  font-size: 17px;
}

.tutorial-intro a,
.tutorial-step p a,
.faq-answer a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: .18em;
}

.quick-flow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
  padding: 18px 20px;
  overflow-x: auto;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.quick-flow span:nth-child(even) {
  color: var(--color-accent);
}

.tutorial-step {
  position: relative;
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 30px;
  max-width: 1040px;
  margin-right: auto;
  margin-left: auto;
  padding-top: 76px;
  padding-bottom: 76px;
  border-top: 1px solid var(--color-border);
}

.step-marker {
  position: sticky;
  top: var(--toc-offset);
  width: 54px;
  height: 54px;
  border: 1px solid var(--color-text);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  counter-increment: tutorial-step;
}

.tutorial-document {
  counter-reset: tutorial-step;
}

.step-marker::before {
  display: grid;
  width: 100%;
  height: 100%;
  place-items: center;
  content: counter(tutorial-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
}

.step-content {
  min-width: 0;
}

.step-label {
  margin-bottom: 10px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: .14em;
}

.step-content > h2 {
  margin-bottom: 26px;
}

.step-content > p {
  max-width: 840px;
  margin-bottom: 18px;
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.8;
}

.step-content pre {
  margin: 24px 0;
}

.step-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.platform-instructions {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.platform-instruction {
  padding: 28px;
  background: var(--color-panel-muted);
}

.platform-instruction:nth-child(even) {
  background: var(--color-panel);
}

.platform-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.platform-heading h3 {
  margin: 0;
}

.platform-code {
  display: inline-flex;
  min-width: 54px;
  min-height: 30px;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .08em;
}

.platform-instruction p {
  margin-bottom: 14px;
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.76;
}

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

.completion-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
  margin-top: 32px;
  padding: 24px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.completion-note p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 17px;
}

.next-reading {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  margin-top: 48px;
  padding: 34px;
  background: var(--color-panel-muted);
}

.next-reading .mono {
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: .13em;
}

.next-reading h2 {
  margin: 10px 0 12px;
  font-family: var(--font-serif);
  font-size: 32px;
}

.next-reading p {
  max-width: 680px;
  margin: 0;
  color: var(--color-muted);
}

@media (max-width: 900px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
    gap: 38px;
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .tutorial-hero-index {
    max-width: 680px;
  }

  .tutorial-step {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 20px;
  }

  .step-marker {
    width: 46px;
    height: 46px;
  }
}

@media (max-width: 768px) {
  .tutorial-hero-grid {
    padding-top: 38px;
    padding-bottom: 44px;
  }

  .tutorial-hero-lede {
    font-size: 18px;
  }

  .tutorial-document {
    padding-top: 28px;
  }

  .tutorial-intro {
    padding-top: 24px;
    padding-bottom: 56px;
  }

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

  .step-marker {
    position: static;
  }

  .step-content > p {
    font-size: 17px;
  }

  .platform-instruction {
    padding: 22px;
  }

  .completion-note,
  .next-reading {
    grid-template-columns: 1fr;
  }

  .next-reading .btn {
    justify-self: start;
  }
}

@media (max-width: 480px) {
  .tutorial-hero-index {
    padding: 20px;
  }

  .tutorial-hero-index p {
    font-size: 17px;
  }

  .quick-flow {
    gap: 9px;
    padding: 16px;
  }

  .step-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .step-actions .btn {
    width: 100%;
  }

  .platform-instruction {
    padding: 18px;
  }

  .platform-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .completion-note,
  .next-reading {
    padding: 22px;
  }

  .next-reading h2 {
    font-size: 28px;
  }
}