.tutorial-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-panel);
  padding-top: 86px;
  padding-bottom: 86px;
}

.tutorial-hero::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px);
  background-size: 42px 42px;
  content: "";
  mask-image: linear-gradient(to right, transparent, var(--color-text), transparent);
  opacity: 0.34;
  pointer-events: none;
}

.tutorial-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  align-items: center;
  gap: 74px;
}

.tutorial-hero-copy {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.tutorial-hero-copy h1 {
  max-width: 680px;
  margin-top: 24px;
}

.tutorial-lead {
  max-width: 670px;
  color: var(--color-text-soft);
  font-size: 19px;
  line-height: 1.8;
}

.tutorial-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.tutorial-route {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--color-page);
  box-shadow: var(--shadow-card);
  padding: 28px;
}

.tutorial-route::after {
  position: absolute;
  top: 76px;
  bottom: 38px;
  left: 57px;
  width: 2px;
  background: var(--gradient-warm);
  content: "";
}

.route-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding-bottom: 18px;
}

.route-list {
  display: grid;
  list-style: none;
  padding-top: 8px;
}

.route-list li {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) auto;
  align-items: center;
  gap: 15px;
  min-height: 70px;
  border-bottom: 1px solid var(--color-line);
}

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

.route-list li::before {
  position: absolute;
  left: 25px;
  width: 11px;
  height: 11px;
  border: 3px solid var(--color-page);
  border-radius: var(--radius-pill);
  background: var(--gradient-warm);
  box-shadow: var(--shadow-beacon);
  content: "";
}

.route-code {
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}

.route-list strong {
  font-size: 16px;
}

.route-list li > span:last-child {
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}

.tutorial-guide {
  padding-top: 0;
  padding-bottom: var(--section-space);
}

.tutorial-guide > .toc-tabs {
  top: 0;
  margin-bottom: 0;
}

.tutorial-reading {
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
  padding-top: 56px;
}

.tutorial-section {
  position: relative;
  border-bottom: 1px solid var(--color-line);
  padding-top: 76px;
  padding-bottom: 76px;
}

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

.step-heading {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  align-items: start;
  gap: 20px;
  margin-bottom: 28px;
}

.step-heading .section-kicker {
  margin-bottom: 7px;
}

.step-heading h2 {
  margin-bottom: 0;
}

.step-number {
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
}

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

.tutorial-section p strong {
  color: var(--color-text);
}

.inline-link {
  color: var(--color-accent-deep);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--color-accent-ring);
  text-underline-offset: 4px;
}

.inline-link:hover {
  text-decoration-color: var(--color-accent);
}

.step-action {
  display: flex;
  margin-top: 28px;
}

.platform-walkthroughs {
  display: grid;
  gap: 18px;
  margin: 36px 0;
}

.walkthrough-card {
  position: relative;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-page);
  padding: 28px;
  transition: border-color var(--motion-fast), background var(--motion-fast), transform var(--motion-fast);
}

.walkthrough-card:hover {
  border-color: var(--color-accent);
  background: var(--color-panel);
  transform: translateY(-2px);
}

.walkthrough-card p:last-child {
  margin-bottom: 0;
}

.walkthrough-label {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 18px;
}

.walkthrough-label h3 {
  margin-bottom: 0;
  font-size: 22px;
}

.platform-mark {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--gradient-warm);
  color: var(--color-page);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 800;
}

@media (max-width: 980px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

@media (max-width: 768px) {
  .tutorial-hero {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .tutorial-lead {
    font-size: 17px;
  }

  .tutorial-reading {
    padding-top: 38px;
  }

  .tutorial-section {
    padding-top: 60px;
    padding-bottom: 60px;
  }
}

@media (max-width: 640px) {
  .tutorial-hero-grid {
    gap: 34px;
  }

  .tutorial-actions {
    display: grid;
  }

  .tutorial-route {
    border-radius: var(--radius-lg);
    padding: 20px 17px;
  }

  .tutorial-route::after {
    top: 68px;
    bottom: 30px;
    left: 41px;
  }

  .route-list li {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
  }

  .route-list li::before {
    left: 19px;
    width: 9px;
    height: 9px;
  }

  .route-list li > span:last-child {
    grid-column: 2;
    margin-top: -22px;
    padding-bottom: 10px;
  }

  .step-heading {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 14px;
  }

  .step-number {
    width: 42px;
    height: 42px;
  }

  .walkthrough-card {
    padding: 22px 18px;
  }

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