.tutorial-hero {
  position: relative;
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(58px, 8vw, 94px);
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  background-image: linear-gradient(var(--color-accent-tint), var(--color-bg));
}

.tutorial-hero::after {
  position: absolute;
  right: -10%;
  bottom: -84px;
  width: min(560px, 62vw);
  height: 190px;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-pill);
  content: "";
  pointer-events: none;
  transform: rotate(-7deg);
}

.tutorial-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(310px, .72fr);
  gap: clamp(34px, 7vw, 86px);
  align-items: center;
}

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

.tutorial-intro h1 {
  max-width: 760px;
  margin-bottom: 18px;
}

.tutorial-lede {
  max-width: 680px;
  margin-bottom: 26px;
  color: var(--color-text-muted);
  font-size: clamp(17px, 2vw, 20px);
}

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

.tutorial-facts {
  justify-content: flex-start;
}

.tutorial-route-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-window);
  background: var(--color-paper);
  box-shadow: var(--shadow-window);
}

.tutorial-route-chrome {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-text-muted);
  font-size: 11px;
  letter-spacing: .08em;
}

.tutorial-route-chrome .mono {
  margin-left: 7px;
}

.tutorial-route-list {
  position: relative;
  margin: 0;
  padding: 18px 20px;
  list-style: none;
}

.tutorial-route-list::before {
  position: absolute;
  top: 38px;
  bottom: 38px;
  left: 30px;
  width: 1px;
  background: var(--color-border);
  content: "";
}

.tutorial-route-list li {
  position: relative;
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 14px;
  padding: 10px 0;
}

.route-node {
  position: relative;
  z-index: 1;
  width: 21px;
  height: 21px;
  flex-shrink: 0;
  border: 5px solid var(--color-paper);
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-border);
}

.tutorial-route-list li:last-child .route-node {
  background: var(--color-success);
}

.tutorial-route-list strong,
.tutorial-route-list small {
  display: block;
}

.tutorial-route-list strong {
  color: var(--color-text);
  font-size: 14px;
}

.tutorial-route-list small {
  color: var(--color-text-muted);
  font-size: 12px;
}

.tutorial-route-foot {
  margin: 0;
  padding: 10px 18px;
  border-top: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
}

.tutorial-article {
  padding-top: clamp(42px, 7vw, 78px);
  padding-bottom: var(--section-space);
}

.tutorial-article > .callout {
  max-width: 940px;
  margin-bottom: clamp(48px, 7vw, 80px);
}

.tutorial-step {
  display: grid;
  grid-template-columns: minmax(110px, .22fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 62px);
  padding-top: clamp(56px, 8vw, 92px);
  padding-bottom: clamp(56px, 8vw, 92px);
  border-top: 1px solid var(--color-border);
}

.tutorial-step:first-of-type {
  border-top: 0;
}

.step-rail {
  min-width: 0;
}

.step-rail span {
  position: sticky;
  top: calc(var(--header-height) + 78px);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  writing-mode: vertical-rl;
}

.step-rail span::before {
  width: 9px;
  height: 9px;
  flex-shrink: 0;
  background: var(--color-warning);
  content: "";
  transform: rotate(45deg);
}

.step-content {
  min-width: 0;
  max-width: 880px;
}

.step-content > p {
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.9;
}

.step-content > p + p {
  margin-top: 18px;
}

.step-kicker,
.platform-label {
  display: inline-block;
  margin-bottom: 9px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
}

.step-content h2 {
  margin-bottom: 28px;
}

.step-action {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 20px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--color-border);
}

.step-action span {
  color: var(--color-text-muted);
  font-size: 14px;
}

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

.platform-instructions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.platform-guide {
  min-width: 0;
  padding: clamp(22px, 4vw, 32px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
}

.platform-guide:nth-child(even) {
  background: var(--color-paper);
}

.platform-guide h3 {
  margin-bottom: 18px;
  font-family: var(--font-body);
  font-size: 22px;
}

.platform-guide p {
  margin-bottom: 14px;
  color: var(--color-text-muted);
  line-height: 1.82;
}

.platform-guide p:last-child {
  margin-bottom: 0;
}

.verify-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 30px;
}

.verify-item {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
}

.verify-item strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-accent-dark);
}

.verify-item p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

.next-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
}

.next-link-card {
  display: block;
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  color: var(--color-text);
  text-decoration: none;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.next-link-card:hover {
  border-color: var(--color-accent);
  background: var(--color-paper);
  color: var(--color-text);
  transform: translateY(-2px);
}

.next-link-card .mono {
  display: block;
  margin-bottom: 10px;
  color: var(--color-accent);
  font-size: 10px;
  letter-spacing: .14em;
}

.next-link-card strong {
  display: block;
  margin-bottom: 7px;
  font-size: 18px;
}

.next-link-card p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

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

  .tutorial-route-card {
    width: min(100%, 620px);
  }

  .tutorial-route-list {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 8px;
  }

  .tutorial-route-list::before {
    top: 38px;
    right: 48px;
    bottom: auto;
    left: 48px;
    width: auto;
    height: 1px;
  }

  .tutorial-route-list li {
    flex-direction: column;
    align-items: flex-start;
  }

  .tutorial-route-list li > div {
    min-width: 0;
  }

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

@media (max-width: 768px) {
  .tutorial-hero {
    padding-top: 46px;
    padding-bottom: 58px;
  }

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

  .tutorial-step {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .step-rail span {
    position: static;
    writing-mode: horizontal-tb;
  }

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

  .step-content > p {
    font-size: 16px;
  }
}

@media (max-width: 640px) {
  .tutorial-route-list {
    grid-template-columns: minmax(0, 1fr);
    padding: 14px 18px;
  }

  .tutorial-route-list::before {
    top: 34px;
    right: auto;
    bottom: 34px;
    left: 28px;
    width: 1px;
    height: auto;
  }

  .tutorial-route-list li {
    flex-direction: row;
    align-items: center;
  }

  .tutorial-route-card {
    border-radius: var(--radius-card);
  }

  .tutorial-actions .btn {
    flex-basis: 100%;
  }

  .step-action {
    align-items: stretch;
  }

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

  .platform-guide,
  .next-link-card {
    padding: 20px;
  }
}