.tutorial-hero {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-page);
}

.tutorial-hero .reading-wrap {
  padding-top: clamp(34px, 5vw, 70px);
}

.tutorial-hero h1 {
  max-width: 760px;
}

.tutorial-actions {
  margin-top: 24px;
}

.tutorial-platforms {
  margin-top: 22px;
}

.tutorial-platforms .platform-chip {
  font-family: var(--font-mono);
}

.tutorial-hero .callout {
  margin-top: 30px;
}

.tutorial-nav-section {
  position: relative;
  z-index: 20;
  padding-top: 24px;
  padding-bottom: 10px;
}

#prepare,
#import,
#mode,
#connect,
#verify,
#quick-fix {
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.prep-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 30px;
}

.prep-grid .card {
  position: relative;
  padding-top: 58px;
}

.prep-number {
  position: absolute;
  top: 20px;
  left: 22px;
  color: var(--color-brand-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 750;
}

.prep-grid h3 {
  font-size: 22px;
}

.tutorial-step-section {
  border-top: 1px solid var(--color-line);
}

.tutorial-step-section:nth-of-type(even) {
  background: var(--color-panel);
}

.tutorial-step {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-window);
  background: var(--color-page);
  box-shadow: var(--shadow-card);
}

.step-heading {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 24px;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-panel);
  padding: clamp(24px, 4vw, 38px);
}

.step-heading h2 {
  margin-bottom: 8px;
}

.step-heading p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 17px;
}

.step-index {
  display: inline-flex;
  width: 82px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-brand);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 750;
}

.step-body {
  padding: clamp(24px, 5vw, 48px);
}

.step-body h3 {
  margin-top: 36px;
  font-size: 23px;
}

.step-body h3:first-child {
  margin-top: 0;
}

.step-body p {
  margin-bottom: 20px;
}

.step-check {
  margin-top: 30px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  padding: 20px 22px;
}

.step-check > strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-success);
  font-size: 14px;
}

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

.step-check li + li {
  margin-top: 5px;
}

.mode-compare {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 28px 0;
}

.mode-compare div {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  padding: 18px;
}

.mode-compare strong,
.mode-compare span {
  display: block;
}

.mode-compare strong {
  color: var(--color-brand-dark);
  font-family: var(--font-mono);
}

.mode-compare span {
  margin-top: 5px;
  color: var(--color-ink-muted);
  font-size: 13px;
}

.verification-board {
  display: grid;
  gap: 10px;
  margin: 30px 0;
}

.verification-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 17px 19px;
}

.verification-item .status-dot {
  margin-top: 8px;
}

.verification-item strong {
  display: block;
}

.verification-item p {
  margin: 2px 0 0;
  color: var(--color-ink-muted);
  font-size: 14px;
}

.fix-list {
  display: grid;
  gap: 12px;
}

.fix-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 17px;
  align-items: start;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-page);
  padding: 20px;
}

.fix-item > span {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 50%;
  background: var(--color-brand-soft);
  color: var(--color-brand-dark);
  font-family: var(--font-mono);
  font-weight: 800;
}

.fix-item h3 {
  margin-bottom: 4px;
  font-size: 19px;
}

.fix-item p {
  color: var(--color-ink-muted);
}

.tutorial-next {
  margin-top: 28px;
  border-left: 4px solid var(--color-warning);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  background: var(--color-panel);
  padding: 18px 20px;
}

@media (max-width: 640px) {
  .tutorial-hero .reading-wrap {
    padding-top: 20px;
  }

  .tutorial-platforms {
    gap: 7px;
  }

  .tutorial-platforms .platform-chip {
    flex: 1 1 calc(50% - 7px);
    justify-content: center;
  }

  .prep-grid {
    grid-template-columns: 1fr;
  }

  .step-heading {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .step-index {
    width: 76px;
    height: 34px;
  }

  .mode-compare {
    grid-template-columns: 1fr;
  }

  .fix-item {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 13px;
    padding: 17px;
  }

  .fix-item > span {
    width: 36px;
    height: 36px;
  }
}