.tutorial-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  padding-top: clamp(64px, 9vw, 112px);
  padding-bottom: clamp(64px, 9vw, 112px);
}

.tutorial-hero::before {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, var(--color-border) 0 1px, var(--color-transparent) 1px 44px),
    repeating-linear-gradient(90deg, var(--color-border) 0 1px, var(--color-transparent) 1px 44px);
  content: "";
  opacity: 0.16;
  pointer-events: none;
}

.tutorial-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  align-items: center;
  gap: clamp(38px, 7vw, 88px);
}

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

.tutorial-hero-copy h1 {
  margin-top: 24px;
}

.tutorial-lead {
  max-width: 40em;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.85;
}

.tutorial-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
  margin-bottom: 24px;
}

.tutorial-route {
  position: relative;
  min-height: 290px;
  overflow: hidden;
  padding: clamp(24px, 4vw, 42px);
}

.tutorial-route::before {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, var(--color-border) 0 1px, var(--color-transparent) 1px 28px),
    repeating-linear-gradient(90deg, var(--color-border) 0 1px, var(--color-transparent) 1px 28px);
  content: "";
  opacity: 0.3;
}

.tutorial-route-head,
.tutorial-route-line,
.tutorial-route-labels,
.tutorial-route-note {
  position: relative;
}

.tutorial-route-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.11em;
}

.tutorial-route-line {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto 1fr auto;
  align-items: center;
  margin-top: 82px;
}

.tutorial-route-node {
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel-raised);
  box-shadow: 0 0 0 7px var(--color-panel);
}

.tutorial-route-node.is-current {
  border-color: var(--color-accent);
  background: var(--color-accent);
  box-shadow: 0 0 0 7px var(--color-panel), var(--glow-accent);
}

.tutorial-route-track {
  height: 2px;
  background: var(--color-border);
}

.tutorial-route-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
  color: var(--color-text-muted);
  font-size: 12px;
}

.tutorial-route-note {
  margin-top: 54px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.tutorial-reading {
  padding-top: clamp(48px, 7vw, 84px);
  padding-bottom: var(--section-space);
}

.tutorial-callout {
  margin-bottom: 32px;
}

.tutorial-callout a,
.tutorial-step a:not(.btn) {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-dark);
  text-underline-offset: 3px;
}

.tutorial-reading .toc-tabs {
  margin-bottom: clamp(44px, 7vw, 76px);
}

.tutorial-step {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: clamp(22px, 5vw, 48px);
  padding-top: clamp(48px, 7vw, 76px);
  padding-bottom: clamp(48px, 7vw, 76px);
  border-top: 1px solid var(--color-border);
}

.step-marker {
  position: sticky;
  top: calc(var(--toc-offset) + 24px);
  align-self: start;
  border-left: 3px solid var(--color-accent);
  padding: 5px 0 5px 14px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.step-content {
  min-width: 0;
}

.step-content h2 {
  margin-bottom: 26px;
}

.step-content p {
  line-height: 1.95;
}

.step-content .btn {
  margin-top: 12px;
}

.step-next {
  border-top: 1px solid var(--color-border);
  margin-top: 30px;
  padding-top: 20px;
  color: var(--color-text);
  font-weight: 600;
}

.platform-guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
  margin-bottom: 30px;
}

.platform-guide {
  padding: clamp(22px, 4vw, 30px);
}

.platform-guide h3 {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 18px;
}

.platform-guide p {
  margin-bottom: 1em;
  font-size: 14px;
}

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

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

  .tutorial-route {
    min-height: 220px;
  }

  .tutorial-route-line {
    margin-top: 54px;
  }

  .tutorial-route-note {
    margin-top: 36px;
  }
}

@media (max-width: 768px) {
  .tutorial-hero {
    padding-top: 54px;
    padding-bottom: 58px;
  }

  .tutorial-route {
    min-height: 154px;
    padding: 20px;
  }

  .tutorial-route-head,
  .tutorial-route-labels,
  .tutorial-route-note {
    display: none;
  }

  .tutorial-route-line {
    margin-top: 52px;
  }

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

  .step-marker {
    position: static;
    width: max-content;
  }

  .platform-guide-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 430px) {
  .tutorial-hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .tutorial-route {
    min-height: 132px;
  }

  .tutorial-route-line {
    margin-top: 36px;
  }

  .tutorial-step {
    padding-top: 44px;
    padding-bottom: 44px;
  }
}