.tutorial-hero {
  padding-top: 72px;
  padding-bottom: 72px;
}

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

.tutorial-hero .lead {
  max-width: 760px;
}

.tutorial-hero .callout {
  margin-top: 32px;
}

.tutorial-hero .callout a,
.tutorial-prose a {
  text-decoration: underline;
  text-decoration-color: var(--color-muted);
  text-underline-offset: 3px;
}

.tutorial-hero .callout a:hover,
.tutorial-prose a:hover {
  text-decoration-color: var(--color-ink);
}

.tutorial-route {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 36px;
  overflow: clip;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.tutorial-route a {
  display: flex;
  min-height: 86px;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 16px 18px;
}

.tutorial-route a + a {
  border-left: 1px solid var(--color-line);
}

.tutorial-route a:hover {
  background: var(--color-soft);
}

.tutorial-route span,
.step-kicker {
  color: var(--color-muted);
  font: 11px/1.4 var(--font-mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.tutorial-route strong {
  font-size: 15px;
}

.tutorial-workbench {
  padding-top: 32px;
}

.tutorial-frame {
  position: relative;
}

.tutorial-frame > .toc {
  margin-bottom: 56px;
}

.tutorial-prose {
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
}

.tutorial-chapter {
  padding-top: 24px;
  padding-bottom: 72px;
  scroll-margin-top: 88px;
  border-bottom: 1px solid var(--color-line);
}

.tutorial-chapter + .tutorial-chapter {
  padding-top: 72px;
}

.tutorial-chapter:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.tutorial-chapter > h2 {
  margin-top: 10px;
}

.tutorial-chapter > p {
  color: var(--color-ink);
}

.preflight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.preflight-grid .card {
  padding: 18px;
  box-shadow: none;
}

.preflight-grid h3 {
  font-size: 17px;
}

.preflight-grid p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.mode-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 28px 0;
  overflow: clip;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-panel);
}

.mode-board > div {
  padding: 22px;
}

.mode-board > div + div {
  border-left: 1px solid var(--color-line);
}

.mode-board h3 {
  margin-top: 16px;
  font-size: 19px;
}

.mode-board p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.result-checklist {
  margin: 28px 0;
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.result-checklist h3 {
  font-size: 19px;
}

.result-checklist ul {
  margin-bottom: 0;
}

.result-checklist li + li {
  margin-top: 8px;
}

.next-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 32px;
}

.next-links a {
  display: block;
  text-decoration: none;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.next-links a:hover {
  border-color: var(--color-muted);
  background: var(--color-panel);
  text-decoration: none;
}

.next-links h3 {
  margin-top: 10px;
  font-size: 18px;
}

.next-links p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 14px;
}

@media (max-width: 760px) {
  .tutorial-hero {
    padding-top: 48px;
    padding-bottom: 56px;
  }

  .tutorial-route {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tutorial-route a:nth-child(3),
  .tutorial-route a:nth-child(4) {
    border-top: 1px solid var(--color-line);
  }

  .tutorial-route a:nth-child(3) {
    border-left: 0;
  }

  .preflight-grid,
  .mode-board,
  .next-links {
    grid-template-columns: 1fr;
  }

  .mode-board > div + div {
    border-top: 1px solid var(--color-line);
    border-left: 0;
  }

  .tutorial-frame > .toc {
    margin-bottom: 40px;
  }

  .tutorial-chapter {
    padding-bottom: 56px;
  }

  .tutorial-chapter + .tutorial-chapter {
    padding-top: 56px;
  }
}

@media (max-width: 420px) {
  .tutorial-route {
    grid-template-columns: 1fr;
  }

  .tutorial-route a + a,
  .tutorial-route a:nth-child(3),
  .tutorial-route a:nth-child(4) {
    border-top: 1px solid var(--color-line);
    border-left: 0;
  }

  .tutorial-route a {
    min-height: 72px;
  }

  .result-checklist {
    padding: 20px;
  }
}