.tutorial-hero {
  border-bottom: 1px solid var(--color-border);
}

.tutorial-hero .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  align-items: end;
  gap: clamp(42px, 7vw, 92px);
}

.tutorial-hero-copy {
  padding-top: clamp(28px, 5vw, 68px);
  padding-bottom: clamp(22px, 4vw, 48px);
}

.tutorial-hero-copy h1 {
  max-width: 840px;
  margin-top: 15px;
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

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

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

.tutorial-route {
  overflow: hidden;
  border: 1px solid var(--color-engine-line);
  border-radius: var(--radius-large) var(--radius-large) 0 0;
  background: var(--color-engine);
  color: var(--color-engine-text);
}

.tutorial-route-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-engine-line);
  padding: 13px 18px;
  color: var(--color-engine-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.tutorial-route ol {
  list-style: none;
}

.tutorial-route li {
  position: relative;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--color-engine-line);
  padding: 18px;
}

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

.tutorial-route li::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 38px;
  width: 1px;
  background: var(--color-engine-line);
  content: "";
}

.route-number {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: 42px;
  height: 30px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-engine-line);
  border-radius: var(--radius-pill);
  background: var(--color-engine);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
}

.tutorial-route strong {
  color: var(--color-engine-text);
  font-size: 14px;
}

.tutorial-route small {
  color: var(--color-engine-muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.platform-switch {
  display: grid;
  grid-template-columns: minmax(230px, 0.65fr) minmax(0, 1.35fr);
  align-items: center;
  gap: 40px;
  margin-bottom: 30px;
}

.platform-switch h2 {
  margin-top: 9px;
}

.platform-switch .platform-row {
  justify-content: flex-end;
}

.platform-switch .platform-link {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  padding: 8px 14px;
  transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.platform-switch .platform-link:hover {
  border-color: var(--color-text-muted);
  background: var(--color-surface);
}

.toc-section {
  position: relative;
  z-index: 10;
  padding-top: 4px;
  padding-bottom: 4px;
}

.tutorial-manual {
  border-top: 1px solid var(--color-border);
}

.tutorial-step {
  scroll-margin-top: calc(var(--header-height) + 30px);
  border-bottom: 1px solid var(--color-border);
}

.step-layout {
  display: grid;
  grid-template-columns: 180px minmax(0, var(--reading-width));
  justify-content: space-between;
  gap: clamp(42px, 8vw, 112px);
}

.step-index {
  position: sticky;
  top: calc(var(--header-height) + 82px);
  align-self: start;
}

.step-index span {
  display: block;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: clamp(58px, 7vw, 92px);
  font-weight: 800;
  line-height: 0.88;
  letter-spacing: -0.08em;
}

.step-index small {
  display: block;
  margin-top: 16px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.step-content {
  width: 100%;
}

.step-content > h2:first-child {
  margin-top: 0;
}

.rule-sample {
  overflow: hidden;
  border: 1px solid var(--color-engine-line);
  border-radius: var(--radius-medium);
  background: var(--color-engine);
  color: var(--color-engine-text);
}

.rule-sample-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-engine-line);
  padding: 10px 15px;
  color: var(--color-engine-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.rule-sample-row {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 14px;
  padding: 8px 15px;
  color: var(--color-engine-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.rule-sample-row + .rule-sample-row {
  border-top: 1px solid var(--color-engine-line);
}

.rule-sample-row code {
  overflow-wrap: anywhere;
  border: 0;
  background: transparent;
  color: var(--color-engine-text);
  padding: 0;
}

.rule-sample-row b {
  font-weight: 800;
}

.next-reading {
  margin-top: 48px;
}

.next-reading h3 {
  margin-top: 10px;
}

.next-reading p:not(.eyebrow) {
  margin-top: 12px;
  color: var(--color-text-muted);
}

.next-reading .btn-dark {
  margin-top: 22px;
}

@media (max-width: 900px) {
  .tutorial-hero .wrap {
    grid-template-columns: 1fr;
  }

  .tutorial-hero-copy {
    padding-bottom: 0;
  }

  .tutorial-route {
    border-radius: var(--radius-large);
  }

  .platform-switch {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .platform-switch .platform-row {
    justify-content: flex-start;
  }

  .step-layout {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 42px;
  }

  .step-index {
    position: static;
  }
}

@media (max-width: 640px) {
  .tutorial-hero-copy h1 {
    font-size: clamp(24px, 7vw, 30px);
    line-height: 1.1;
    letter-spacing: -0.02em;
  }

  .tutorial-route li {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .tutorial-route small {
    grid-column: 2;
  }

  .platform-switch .platform-row {
    justify-content: flex-start;
  }

  .platform-switch .platform-link {
    flex: 1 1 calc(50% - 18px);
    justify-content: center;
  }

  .step-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .step-index {
    display: flex;
    align-items: baseline;
    gap: 14px;
  }

  .step-index span {
    font-size: 48px;
  }

  .step-index small {
    margin-top: 0;
  }

  .rule-sample-row {
    font-size: 11px;
  }
}