.tutorial-hero {
  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-position: center;
  background-size: 64px 64px;
  padding-top: clamp(64px, 8vw, 108px);
  padding-bottom: clamp(72px, 9vw, 124px);
}

.tutorial-hero::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent, var(--color-page));
  content: "";
  pointer-events: none;
}

.tutorial-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.75fr);
  gap: clamp(48px, 7vw, 96px);
  align-items: center;
}

.tutorial-hero-copy {
  max-width: 690px;
}

.tutorial-hero-copy h1 {
  max-width: 680px;
  margin-top: 26px;
}

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

.tutorial-map {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-page);
  box-shadow: var(--shadow-card), var(--shadow-high);
  transform: rotate(0.6deg);
}

.tutorial-map-head {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--color-border);
  padding: 14px 20px;
  color: var(--color-ink-muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.tutorial-map-list {
  margin: 0;
  padding: 8px 22px;
  list-style: none;
}

.tutorial-map-list li {
  position: relative;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 82px;
  border-bottom: 1px solid var(--color-border);
}

.tutorial-map-list li:last-child {
  border-bottom: 0;
}

.tutorial-map-list li:not(:last-child)::after {
  position: absolute;
  bottom: -13px;
  left: 18px;
  z-index: 1;
  width: 1px;
  height: 26px;
  background: var(--color-border);
  content: "";
}

.tutorial-map-number {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

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

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

.tutorial-map-list small {
  margin-top: 3px;
  color: var(--color-ink-muted);
  font-size: 12px;
}

.tutorial-route {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  background: var(--color-panel);
}

.tutorial-route span {
  position: relative;
  padding: 12px 6px;
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: center;
}

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

.tutorial-route span:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -4px;
  z-index: 1;
  width: 7px;
  height: 7px;
  border-top: 1px solid var(--color-ink-muted);
  border-right: 1px solid var(--color-ink-muted);
  background: var(--color-panel);
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.tutorial-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-top: 32px;
  padding-bottom: var(--section-space);
}

.tutorial-flow > .toc {
  margin-bottom: 54px;
}

.tutorial-platform-note {
  width: min(100%, var(--reading-width));
  margin: 0 auto 76px;
}

.tutorial-step {
  display: grid;
  width: min(100%, 940px);
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 34px;
  margin-inline: auto;
  padding-top: 24px;
  padding-bottom: 88px;
  scroll-margin-top: 24px;
}

.tutorial-step + .tutorial-step {
  border-top: 1px solid var(--color-border);
  padding-top: 88px;
}

.tutorial-step-index {
  position: sticky;
  top: 20px;
  display: flex;
  width: 64px;
  height: 64px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-page);
  color: var(--color-accent-dark);
  box-shadow: var(--shadow-low);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
}

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

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

.tutorial-step-body > .kicker {
  margin-bottom: 10px;
}

.tutorial-step-body p {
  text-wrap: pretty;
}

.tutorial-step-body code {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel);
  color: var(--color-ink);
  padding: 2px 6px;
  font-size: 0.88em;
}

.tutorial-next-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 42px;
}

.tutorial-next-links .card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.tutorial-next-links .card:hover {
  border-color: var(--color-ink-muted);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

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

.tutorial-next-links p {
  margin-bottom: 22px;
}

.tutorial-next-links .article-link {
  margin-top: auto;
}

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

  .tutorial-map {
    width: min(100%, 620px);
    transform: none;
  }
}

@media (max-width: 768px) {
  .tutorial-hero {
    background-size: 48px 48px;
    padding-top: 52px;
    padding-bottom: 72px;
  }

  .tutorial-flow {
    padding-top: 20px;
  }

  .tutorial-flow > .toc {
    margin-bottom: 42px;
  }

  .tutorial-platform-note {
    margin-bottom: 58px;
  }

  .tutorial-step {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 18px;
    padding-bottom: 68px;
  }

  .tutorial-step + .tutorial-step {
    padding-top: 68px;
  }

  .tutorial-step-index {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    font-size: 12px;
  }

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

@media (max-width: 560px) {
  .tutorial-hero-layout {
    gap: 38px;
  }

  .tutorial-map-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .tutorial-map-list {
    padding-inline: 16px;
  }

  .tutorial-step {
    display: block;
    padding-top: 8px;
  }

  .tutorial-step + .tutorial-step {
    padding-top: 58px;
  }

  .tutorial-step-index {
    position: static;
    width: 44px;
    height: 30px;
    margin-bottom: 18px;
    border-radius: var(--radius-pill);
  }

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

  .tutorial-route span:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--color-border);
  }

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

  .tutorial-route span:nth-child(2)::after {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tutorial-next-links .card:hover {
    transform: none;
  }
}