.tutorial-hero {
  position: relative;
  max-width: 100%;
  overflow-x: clip;
  padding-top: 72px;
  padding-bottom: 72px;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, var(--color-hero-top), var(--color-hero-bottom));
}

.tutorial-hero::before {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--color-dot) 1px, transparent 1.2px);
  background-size: 18px 18px;
  content: "";
  pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, transparent, var(--color-text), transparent);
  mask-image: linear-gradient(90deg, transparent, var(--color-text), transparent);
}

.tutorial-hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
  align-items: center;
  gap: 64px;
}

.tutorial-hero-copy {
  position: relative;
  z-index: 1;
}

.tutorial-hero-copy h1 {
  max-width: 760px;
  margin-bottom: 20px;
}

.tutorial-hero-copy .lead {
  max-width: 720px;
}

.tutorial-hero-actions,
.tutorial-inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tutorial-hero-actions {
  margin-top: 28px;
}

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

.tutorial-route {
  position: relative;
  z-index: 1;
  padding: 22px;
}

.tutorial-route-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.tutorial-route-head strong {
  font-size: 14px;
}

.tutorial-route-head .mono {
  margin-left: auto;
  color: var(--color-text-muted);
  font-size: 11px;
}

.tutorial-route-list {
  position: relative;
  display: grid;
  gap: 10px;
  margin: 18px 0;
  padding: 0;
  list-style: none;
}

.tutorial-route-list::before {
  position: absolute;
  top: 22px;
  bottom: 22px;
  left: 18px;
  width: 1px;
  background: var(--color-border);
  content: "";
}

.tutorial-route-list li {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 36px 1fr;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 9px 12px 9px 9px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--small-shadow);
}

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

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

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

.tutorial-route-index {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--color-panel-muted);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.tutorial-route-end {
  display: flex;
  justify-content: flex-end;
  padding-top: 4px;
}

.tutorial-guide {
  position: relative;
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.tutorial-guide > .callout {
  max-width: 920px;
  margin: 0 0 56px;
}

.tutorial-step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 28px;
  padding-top: 64px;
  padding-bottom: 64px;
  border-top: 1px solid var(--color-border);
}

.tutorial-step:first-of-type {
  border-top: 0;
}

.tutorial-step-marker {
  position: sticky;
  top: calc(var(--header-height) + 76px);
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  align-self: start;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  box-shadow: var(--small-shadow);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.tutorial-step-content {
  max-width: 920px;
}

.tutorial-step-content h2 {
  max-width: 820px;
  font-size: clamp(30px, 3.4vw, 42px);
}

.tutorial-step-content > p {
  max-width: 860px;
}

.tutorial-inline-actions {
  margin: 24px 0 28px;
}

.platform-instruction-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 32px 0;
}

.platform-instruction {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--small-shadow);
}

.platform-instruction-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
}

.platform-label {
  color: var(--color-accent-dark);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.platform-instruction h3 {
  font-size: 21px;
}

.platform-instruction p {
  font-size: 14px;
}

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

.tutorial-step .callout {
  max-width: 860px;
}

@media (max-width: 900px) {
  .tutorial-hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

  .tutorial-step {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .tutorial-step-marker {
    position: static;
  }

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

@media (max-width: 640px) {
  .tutorial-hero-actions,
  .tutorial-inline-actions {
    width: 100%;
    flex-direction: column;
  }

  .tutorial-hero-actions .btn,
  .tutorial-inline-actions .btn {
    width: 100%;
  }

  .tutorial-route {
    padding: 18px;
  }

  .tutorial-route-head .mono {
    display: none;
  }

  .tutorial-guide {
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .tutorial-guide > .callout {
    margin-bottom: 40px;
  }

  .tutorial-step-content h2 {
    font-size: 29px;
  }

  .platform-instruction {
    padding: 20px;
  }
}