.tutorial-hero {
  position: relative;
  overflow: clip;
  border-bottom: 1px solid var(--color-border);
  background-image:
    linear-gradient(var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px);
  background-size: 72px 72px;
  padding-top: 88px;
  padding-bottom: 88px;
}

.tutorial-hero::after {
  position: absolute;
  right: -120px;
  bottom: -180px;
  width: 440px;
  height: 360px;
  background:
    radial-gradient(closest-side at 38% 55%, var(--color-glow-orange), var(--color-transparent) 70%),
    radial-gradient(closest-side at 65% 42%, var(--color-glow-pink), var(--color-transparent) 72%);
  content: "";
  filter: blur(60px);
  opacity: 0.38;
  pointer-events: none;
}

.tutorial-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 0.7fr);
  align-items: center;
  gap: 72px;
}

.tutorial-hero-copy .lead {
  margin-bottom: 28px;
}

.tutorial-hero-copy .button-row {
  margin-bottom: 24px;
}

.tutorial-route {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.tutorial-route-head {
  display: flex;
  min-height: 54px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--color-border);
  padding: 12px 18px;
  color: var(--color-text-muted);
  font-size: 12px;
}

.tutorial-route-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 8px;
  list-style: none;
}

.tutorial-route-list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--color-border);
  padding: 16px 12px;
}

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

.tutorial-route-list li > span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--color-accent-deep);
  border-radius: var(--radius-small);
  background: var(--color-chip);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
}

.tutorial-route-list div {
  display: grid;
  gap: 2px;
}

.tutorial-route-list strong {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.tutorial-route-list small {
  color: var(--color-text-muted);
  font-size: 13px;
}

.tutorial-route-command {
  margin: 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-panel-raised);
  color: var(--color-accent);
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.tutorial-intro {
  padding-top: 88px;
  padding-bottom: 64px;
}

.tutorial-intro h2 {
  max-width: 680px;
}

.platform-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-top: 28px;
  margin-bottom: 24px;
}

.platform-jump > span {
  margin-right: 6px;
  color: var(--color-ink-muted);
  font-size: 12px;
}

.tutorial-toc {
  margin-top: 34px;
  margin-bottom: 0;
}

.tutorial-step-section {
  scroll-margin-top: calc(var(--header-height) + 20px);
  border-top: 1px solid var(--color-paper-border);
  padding-top: 78px;
  padding-bottom: 78px;
}

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

.step-heading {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  align-items: start;
  gap: 20px;
  margin-bottom: 32px;
}

.step-number {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-medium);
  background: var(--color-accent);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
}

.step-label {
  margin-bottom: 5px;
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}

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

.mode-compare {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--color-paper-border);
  border-radius: var(--radius-medium);
  margin-top: 30px;
  margin-bottom: 30px;
  background: var(--color-white);
}

.mode-compare div {
  display: grid;
  align-content: start;
  gap: 9px;
  border-right: 1px solid var(--color-paper-border);
  padding: 20px;
}

.mode-compare div:last-child {
  border-right: 0;
}

.mode-compare strong {
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 13px;
}

.mode-compare span {
  color: var(--color-ink-muted);
  font-size: 14px;
}

.verification-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
  margin-bottom: 30px;
}

.verification-grid .panel-pad {
  padding: 22px;
}

.verification-grid h3 {
  font-size: 18px;
}

.verification-grid p {
  margin-bottom: 0;
  font-size: 14px;
}

.completion-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

@media (max-width: 900px) {
  .tutorial-hero-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 44px;
  }

  .tutorial-route {
    max-width: 620px;
  }

  .verification-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 700px) {
  .tutorial-hero {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .tutorial-intro {
    padding-top: 64px;
    padding-bottom: 48px;
  }

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

  .mode-compare {
    grid-template-columns: minmax(0, 1fr);
  }

  .mode-compare div {
    border-right: 0;
    border-bottom: 1px solid var(--color-paper-border);
  }

  .mode-compare div:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 480px) {
  .tutorial-hero-layout {
    gap: 36px;
  }

  .tutorial-route-list li {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 10px;
    padding-inline: 8px;
  }

  .tutorial-route-command {
    overflow-x: auto;
  }

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

  .step-number {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-small);
    font-size: 12px;
  }

  .platform-jump > span {
    width: 100%;
  }

  .completion-links {
    align-items: stretch;
  }

  .completion-links .button {
    width: 100%;
  }
}