.tutorial-hero {
  position: relative;
  border-bottom: 1px solid var(--color-line);
  padding-top: 76px;
  padding-bottom: 70px;
  overflow-x: clip;
  background:
    linear-gradient(var(--color-shadow-soft), var(--color-shadow-soft)),
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 47px,
      var(--color-line) 48px
    );
  text-align: center;
}

.tutorial-hero::after {
  position: absolute;
  right: 8%;
  bottom: -18px;
  left: 8%;
  height: 34px;
  border: 2px dashed var(--color-water-edge);
  border-bottom: 0;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  content: '';
  opacity: 0.5;
}

.tutorial-hero .lead {
  margin-inline: auto;
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 26px;
}

.tutorial-intro {
  padding-top: 54px;
  padding-bottom: 30px;
}

.tutorial-intro > p {
  margin-top: 24px;
  color: var(--color-text-soft);
}

.tutorial-flow {
  width: 100%;
  max-width: var(--content-reading);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-bottom: var(--section-space);
}

.tutorial-step {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 28px;
  padding-top: 64px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--color-line);
}

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

.tutorial-step__rail {
  position: relative;
}

.tutorial-step__rail::after {
  position: absolute;
  top: 38px;
  bottom: -64px;
  left: 10px;
  border-left: 2px dashed var(--color-brand);
  content: '';
  opacity: 0.2;
}

.tutorial-step:last-child .tutorial-step__rail::after {
  display: none;
}

.tutorial-step__rail span {
  position: sticky;
  top: calc(var(--toc-offset) + 18px);
  display: inline-flex;
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-xs);
  padding: 5px 8px;
  background: var(--color-panel);
  color: var(--color-brand);
  font-family: var(--font-code);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.tutorial-step__body {
  min-width: 0;
}

.tutorial-step__body > h2 {
  margin-top: 0;
}

.tutorial-step__body > p {
  color: var(--color-text-soft);
}

.tutorial-step__body > p:first-of-type {
  color: var(--color-brand);
}

.tutorial-action {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  margin-top: 30px;
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-brand);
  border-radius: var(--radius-sm);
  padding: 20px;
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.tutorial-action p {
  margin: 4px 0 0;
  color: var(--color-text-soft);
  font-size: 14px;
}

.subscription-example {
  display: grid;
  gap: 8px;
  max-width: 100%;
  margin: 26px 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 18px;
  overflow-x: auto;
  background: var(--color-panel-alt);
  -webkit-overflow-scrolling: touch;
}

.subscription-example span {
  color: var(--color-text-soft);
  font-family: var(--font-code);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.subscription-example code {
  width: max-content;
  min-width: 100%;
  color: var(--color-brand-deep);
  white-space: nowrap;
}

.platform-notes {
  display: grid;
  gap: 16px;
  margin: 30px 0;
}

.platform-note {
  position: relative;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.platform-note::after {
  position: absolute;
  top: 0;
  right: 24px;
  width: 32px;
  border-top: 3px solid var(--color-water-edge);
  content: '';
}

.platform-note__code {
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-xs);
  padding: 3px 7px;
  color: var(--color-brand);
  font-family: var(--font-code);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.platform-note h3 {
  font-size: 22px;
}

.platform-note p {
  color: var(--color-text-soft);
}

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

.verify-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 30px 0;
}

.verify-item {
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 18px;
  background: var(--color-panel);
}

.verify-item strong {
  color: var(--color-brand-deep);
}

.verify-item p {
  margin: 6px 0 0;
  color: var(--color-text-soft);
  font-size: 14px;
}

.next-reading > p {
  color: var(--color-text-soft);
}

.next-reading__links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.next-reading__links .card {
  display: block;
  color: var(--color-text);
}

.next-reading__links .mono {
  display: block;
  margin-bottom: 14px;
  color: var(--color-brand);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.next-reading__links h3 {
  font-size: 20px;
}

.next-reading__links p {
  margin-bottom: 0;
  color: var(--color-text-soft);
  font-size: 14px;
}

@media (max-width: 768px) {
  .tutorial-hero {
    padding-top: 56px;
    padding-bottom: 54px;
  }

  .tutorial-step {
    grid-template-columns: 1fr;
    gap: 14px;
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .tutorial-step__rail::after {
    display: none;
  }

  .tutorial-step__rail span {
    position: static;
  }

  .next-reading__links {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .tutorial-intro {
    padding-top: 42px;
  }

  .tutorial-action {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .tutorial-action .btn {
    width: 100%;
  }

  .platform-note {
    padding: 20px;
  }

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

  .tutorial-facts {
    align-items: center;
    flex-direction: column;
  }

  .tutorial-facts .badge {
    justify-content: center;
  }
}