.tutorial-intro {
  position: relative;
  overflow-x: clip;
  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: 56px 56px;
}

.tutorial-intro::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at center, transparent, var(--color-page));
  content: "";
}

.tutorial-intro .reading-wrap {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  padding-top: 72px;
  padding-bottom: 72px;
}

.tutorial-intro h1 {
  max-width: 720px;
  margin-top: 22px;
}

.tutorial-intro__lead {
  max-width: 700px;
  margin-top: 18px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 20px;
}

.tutorial-intro__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

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

.tutorial-body {
  padding-top: 72px;
}

.tutorial-layout {
  display: flex;
  min-height: 100%;
  flex-direction: column;
}

.tutorial-layout > .toc-tabs {
  width: 100%;
}

.tutorial-article {
  margin-top: 8px;
}

.tutorial-section {
  scroll-margin-top: 24px;
}

.tutorial-section + .tutorial-section {
  margin-top: 88px;
}

.tutorial-section > h2,
.tutorial-step__content > h2 {
  margin-top: 0;
}

.platform-guide {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.platform-guide a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-accent-dark);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 1px 2px var(--color-shadow-soft);
}

.platform-guide a:hover {
  border-color: var(--color-accent);
  background: var(--color-mint);
}

.tutorial-step {
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 22px;
}

.tutorial-step::before {
  position: absolute;
  top: 58px;
  bottom: -88px;
  left: 28px;
  width: 1px;
  background: var(--color-border);
  content: "";
}

.tutorial-step:nth-of-type(5)::before {
  display: none;
}

.tutorial-step__marker {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: 58px;
  height: 58px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: var(--color-mint);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 800;
  box-shadow: var(--shadow-card);
}

.tutorial-step__content {
  min-width: 0;
}

.tutorial-check {
  margin-top: 30px;
  margin-bottom: 30px;
  padding: 24px;
}

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

.tutorial-check ul {
  margin-bottom: 0;
}

.tutorial-check li {
  color: var(--color-muted);
}

.tutorial-article .table-scroll {
  margin-top: 28px;
  margin-bottom: 28px;
}

.tutorial-article .faq-list {
  margin-top: 28px;
}

.tutorial-article .article-download-card h2 {
  margin-top: 0;
  font-size: 25px;
}

@media (max-width: 768px) {
  .tutorial-intro .reading-wrap {
    padding-top: 52px;
    padding-bottom: 52px;
  }

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

  .tutorial-body {
    padding-top: 52px;
  }

  .tutorial-section + .tutorial-section {
    margin-top: 68px;
  }

  .tutorial-step {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
  }

  .tutorial-step::before {
    top: 44px;
    bottom: -68px;
    left: 21px;
  }

  .tutorial-step__marker {
    width: 44px;
    height: 44px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .tutorial-step {
    display: block;
  }

  .tutorial-step::before {
    display: none;
  }

  .tutorial-step__marker {
    margin-bottom: 16px;
  }

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

  .platform-guide a {
    width: 100%;
    justify-content: center;
  }

  .tutorial-check {
    padding: 20px;
  }
}