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

.tutorial-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  gap: 52px;
  align-items: center;
}

.tutorial-hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.tutorial-hero-copy h1 {
  max-width: 14em;
}

.tutorial-hero-copy .lead {
  margin-top: 24px;
}

.tutorial-hero-copy .button-row {
  margin-top: 28px;
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.tutorial-facts span {
  display: inline-flex;
  max-width: 100%;
  padding: 6px 12px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  background: var(--color-page);
  color: var(--color-muted);
  font-size: 13px;
}

.tutorial-route {
  position: relative;
  padding: 30px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-app);
}

.tutorial-route::before {
  position: absolute;
  top: 0;
  right: 28px;
  left: 28px;
  height: 4px;
  border-radius: 0 0 var(--radius-round) var(--radius-round);
  background: var(--gradient-brand);
  content: "";
}

.tutorial-route-label {
  margin-bottom: 20px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.tutorial-route-list {
  display: grid;
  gap: 12px;
  list-style: none;
}

.tutorial-route-list li {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 15px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-page);
}

.tutorial-route-number {
  display: inline-flex;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-panel-strong);
  color: var(--color-brand-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.tutorial-route-list strong,
.tutorial-route-list small {
  display: block;
}

.tutorial-route-list strong {
  color: var(--color-ink);
  font-size: 15px;
}

.tutorial-route-list small {
  margin-top: 2px;
  color: var(--color-muted);
  font-size: 12px;
}

.platform-guide {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding: 32px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
}

.platform-guide-copy {
  max-width: 46em;
}

.platform-guide-copy p {
  margin-top: 14px;
  color: var(--color-muted);
}

.platform-guide .platform-row {
  flex: 0 1 360px;
  justify-content: flex-end;
}

.platform-guide .chip {
  background: var(--color-page);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.platform-guide .chip:hover {
  border-color: var(--color-brand);
  color: var(--color-ink);
  transform: translateY(-2px);
}

.tutorial-content {
  padding-top: 72px;
}

.tutorial-content .toc-tabs {
  margin-bottom: 64px;
}

.tutorial-step {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 34px;
  padding-top: 72px;
  padding-bottom: 72px;
  border-bottom: 1px solid var(--color-line);
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.tutorial-step:first-of-type {
  padding-top: 12px;
}

.tutorial-step-final {
  border-bottom: 0;
}

.step-index {
  display: inline-flex;
  width: 72px;
  height: 72px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  color: var(--color-brand-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 750;
  box-shadow: var(--shadow-soft);
}

.step-body {
  max-width: var(--reading-width);
}

.step-body > p {
  margin-top: 20px;
  color: var(--color-ink);
  font-size: 17px;
  line-height: 1.85;
}

.step-body > p a {
  color: var(--color-brand-deep);
  text-decoration: underline;
  text-decoration-color: var(--color-brand);
  text-underline-offset: 3px;
}

.step-body .button-row {
  margin-top: 28px;
}

.step-check {
  margin-top: 28px;
  padding: 22px 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.step-check strong {
  display: block;
  margin-bottom: 10px;
  color: var(--color-ink);
}

.step-check ul {
  display: grid;
  gap: 8px;
  padding-left: 1.25em;
  color: var(--color-muted);
}

.step-check li::marker {
  color: var(--color-success);
}

.mode-compare,
.verify-grid {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.mode-compare {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mode-compare article {
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-page);
  box-shadow: var(--shadow-soft);
}

.mode-compare h3 {
  margin-bottom: 10px;
  font-size: 19px;
}

.mode-compare p {
  color: var(--color-muted);
  font-size: 14px;
}

.verify-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.verify-grid .card {
  padding: 22px;
}

.verify-grid .card-title {
  font-size: 18px;
}

.tutorial-summary {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.7fr);
  gap: 52px;
  align-items: center;
}

.summary-list {
  display: grid;
  gap: 12px;
  list-style: none;
}

.summary-list li {
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-page);
  color: var(--color-muted);
}

.summary-list strong {
  color: var(--color-ink);
}

@media (max-width: 960px) {
  .tutorial-hero-grid,
  .tutorial-summary {
    grid-template-columns: 1fr;
  }

  .tutorial-hero-grid {
    gap: 36px;
  }

  .tutorial-route {
    max-width: 680px;
  }

  .platform-guide {
    align-items: flex-start;
    flex-direction: column;
  }

  .platform-guide .platform-row {
    flex-basis: auto;
    justify-content: flex-start;
  }

  .mode-compare,
  .verify-grid {
    grid-template-columns: 1fr;
  }
}

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

  .tutorial-step {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 20px;
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .step-index {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
  }

  .step-body > p {
    font-size: 16px;
  }

  .tutorial-content .toc-tabs {
    margin-bottom: 44px;
  }
}

@media (max-width: 560px) {
  .tutorial-route,
  .platform-guide {
    padding: 22px;
    border-radius: var(--radius-lg);
  }

  .tutorial-route-list li {
    padding: 13px;
  }

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

  .step-index {
    width: auto;
    height: 38px;
    justify-self: start;
    padding-inline: 14px;
    border-radius: var(--radius-round);
  }

  .step-check {
    padding: 18px;
  }

  .tutorial-summary {
    gap: 30px;
  }
}