.tutorial-hero {
  position: relative;
  overflow: hidden;
  padding-top: 92px;
  padding-bottom: 72px;
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(135deg, var(--color-accent-haze), var(--color-accent-clear) 44%),
    var(--color-bg);
}

.tutorial-hero::after {
  position: absolute;
  top: 0;
  right: max(var(--gutter), calc((100vw - var(--wrap-max)) / 2 + var(--gutter)));
  width: min(34vw, 420px);
  height: 100%;
  background:
    linear-gradient(90deg, var(--color-accent-clear), var(--color-border), var(--color-accent-clear)) top / 100% 1px no-repeat,
    repeating-linear-gradient(90deg, var(--color-accent-clear), var(--color-accent-clear) 31px, var(--color-border) 32px);
  content: '';
  opacity: 0.46;
  pointer-events: none;
}

.guide-heading {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.guide-heading h1 {
  margin-bottom: 18px;
}

.guide-heading .lead {
  margin-bottom: 0;
}

.guide-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.guide-shell {
  padding-top: 30px;
  padding-bottom: var(--section-space);
}

.guide-document {
  width: 100%;
  max-width: 1040px;
  margin-inline: auto;
  padding-top: 36px;
}

.guide-document > .callout {
  margin-top: 0;
  margin-bottom: 34px;
}

.guide-document .callout a {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-deep);
  text-underline-offset: 4px;
}

.guide-step {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  border-top: 1px solid var(--color-border);
}

.guide-step:last-child {
  border-bottom: 1px solid var(--color-border);
}

.step-rail {
  position: relative;
  padding-top: 52px;
  padding-right: 24px;
  border-right: 1px solid var(--color-border);
}

.step-rail::before {
  position: absolute;
  top: 58px;
  right: -4px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--color-accent-deep);
  border-radius: var(--radius-xs);
  background: var(--color-accent);
  content: '';
}

.step-code,
.section-signal,
.import-label,
.next-guide-code {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
}

.step-code {
  display: block;
  white-space: nowrap;
}

.step-content {
  padding-top: 50px;
  padding-right: 12px;
  padding-bottom: 58px;
  padding-left: 48px;
}

.section-signal {
  margin-bottom: 12px;
  color: var(--color-accent);
}

.step-content h2 {
  margin-bottom: 24px;
}

.step-content > p {
  max-width: 820px;
  font-size: 16px;
  line-height: 1.86;
}

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

.step-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.platform-import-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}

.import-card {
  min-height: 100%;
  padding: 25px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--edge-highlight);
}

.import-label {
  margin-bottom: 15px;
}

.import-card h3 {
  margin-bottom: 15px;
  font-family: var(--font-display);
  font-size: 27px;
  font-weight: 400;
}

.import-card p {
  font-size: 14px;
  line-height: 1.8;
}

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

.verification-grid {
  display: grid;
  gap: 10px;
  margin-top: 32px;
}

.verification-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.verify-mark {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-round);
  background: var(--color-panel-raised);
  color: var(--color-text-muted);
}

.verify-mark svg {
  width: 20px;
  height: 20px;
}

.verification-item h3 {
  margin-bottom: 4px;
  font-size: 16px;
}

.verification-item p {
  margin-bottom: 0;
  font-size: 13.5px;
}

.next-guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 34px;
}

.next-guide {
  display: flex;
  min-height: 176px;
  flex-direction: column;
  padding: 21px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.next-guide:hover {
  border-color: var(--color-text-muted);
  background: var(--color-panel-raised);
  transform: translateY(-2px);
}

.next-guide-code {
  margin-bottom: 20px;
}

.next-guide strong {
  margin-bottom: 8px;
  color: var(--color-text);
  font-size: 16px;
}

.next-guide span:last-child {
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.65;
}

@media (max-width: 820px) {
  .tutorial-hero::after {
    width: 38vw;
    opacity: 0.28;
  }

  .guide-step {
    grid-template-columns: 82px minmax(0, 1fr);
  }

  .step-rail {
    padding-right: 16px;
  }

  .step-content {
    padding-left: 30px;
  }

  .platform-import-grid,
  .next-guide-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .next-guide {
    min-height: 0;
  }
}

@media (max-width: 640px) {
  .tutorial-hero {
    padding-top: 58px;
    padding-bottom: 48px;
  }

  .tutorial-hero::after {
    display: none;
  }

  .guide-shell {
    padding-top: 18px;
  }

  .guide-document {
    padding-top: 26px;
  }

  .guide-step {
    display: block;
  }

  .step-rail {
    padding-top: 34px;
    padding-right: 0;
    border-right: 0;
  }

  .step-rail::before {
    top: 39px;
    right: auto;
    left: 0;
  }

  .step-code {
    padding-left: 18px;
  }

  .step-content {
    padding-top: 14px;
    padding-right: 0;
    padding-bottom: 46px;
    padding-left: 0;
  }

  .step-content > p {
    font-size: 15px;
  }

  .step-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .step-actions .btn-primary,
  .step-actions .btn-secondary {
    width: 100%;
  }

  .import-card {
    padding: 20px;
  }

  .verification-item {
    grid-template-columns: 36px minmax(0, 1fr);
    padding: 16px;
  }

  .verify-mark {
    width: 34px;
    height: 34px;
  }
}