.tutorial-hero {
  position: relative;
  padding-top: clamp(68px, 9vw, 112px);
  padding-bottom: clamp(72px, 10vw, 126px);
  overflow-x: clip;
  background:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px),
    var(--color-bg);
  background-size: 72px 72px;
}

.tutorial-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, var(--color-bg), var(--color-ribbon-fade));
  pointer-events: none;
}

.tutorial-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(440px, 0.78fr);
  align-items: center;
  gap: clamp(42px, 8vw, 108px);
}

.tutorial-hero-copy {
  position: relative;
  z-index: 3;
  min-width: 0;
}

.tutorial-hero-copy h1 {
  max-width: 720px;
  margin-top: 22px;
  margin-bottom: 22px;
}

.tutorial-lead {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(17px, 2vw, 21px);
}

.tutorial-route-card {
  position: relative;
  z-index: 2;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-card-deep);
  transform: rotate(1deg);
}

.tutorial-card-bar {
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 22px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel-soft);
}

.tutorial-card-dots {
  display: flex;
  gap: 7px;
}

.tutorial-card-dot {
  width: 9px;
  height: 9px;
  display: block;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
}

.tutorial-card-dot-accent {
  background: var(--color-accent);
}

.tutorial-card-dot-warn {
  background: var(--color-warn);
}

.tutorial-card-dot-success {
  background: var(--color-success);
}

.tutorial-card-label {
  color: var(--color-text-faint);
  font: 700 10px var(--font-mono);
  letter-spacing: 0.12em;
}

.tutorial-route-body {
  position: relative;
  z-index: 2;
  padding: clamp(24px, 4vw, 36px);
}

.tutorial-route-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 30px;
  font-weight: 800;
}

.tutorial-route-flow {
  display: grid;
  gap: 0;
}

.tutorial-flow-item {
  min-width: 0;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: center;
  gap: 15px;
}

.tutorial-flow-node {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: var(--color-panel);
  font: 800 13px var(--font-mono);
}

.tutorial-flow-item.is-complete .tutorial-flow-node {
  border-color: var(--color-success);
  color: var(--color-panel);
  background: var(--color-success);
  box-shadow: 0 8px 22px var(--color-success-glow);
}

.tutorial-flow-item.is-current .tutorial-flow-node {
  border-color: var(--color-accent);
  color: var(--color-panel);
  background: var(--color-accent);
  box-shadow: var(--shadow-button);
}

.tutorial-flow-item strong,
.tutorial-flow-item small {
  display: block;
}

.tutorial-flow-item strong {
  color: var(--color-text);
}

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

.tutorial-flow-line {
  width: 2px;
  height: 24px;
  margin-left: 22px;
  background: var(--gradient-ribbon);
}

.tutorial-ribbon {
  position: absolute;
  z-index: 1;
  right: -86px;
  bottom: -54px;
  width: 270px;
  height: 116px;
  border-radius: var(--radius-pill);
  background: var(--gradient-ribbon);
  opacity: 0.34;
  transform: rotate(-18deg);
}

.tutorial-intro {
  padding-bottom: 28px;
}

.tutorial-intro .callout {
  margin-top: 0;
}

.tutorial-intro .callout a,
.tutorial-prose p a,
.tutorial-prose .callout a {
  color: var(--color-accent-dark);
  font-weight: 750;
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 3px;
}

.tutorial-document {
  display: grid;
  grid-template-columns: minmax(190px, 240px) minmax(0, 820px);
  justify-content: center;
  align-items: start;
  gap: clamp(36px, 7vw, 88px);
  padding-top: 42px;
  padding-bottom: var(--section-space);
}

.tutorial-side-index {
  position: sticky;
  top: calc(var(--toc-offset) + 18px);
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: 0 16px 46px var(--color-shadow);
}

.tutorial-index-kicker {
  margin-bottom: 14px;
  color: var(--color-text-faint);
  font: 750 11px var(--font-mono);
  letter-spacing: 0.1em;
}

.tutorial-side-index ol {
  display: grid;
  gap: 5px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tutorial-side-index a {
  min-height: 42px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 9px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 700;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.tutorial-side-index a:hover {
  color: var(--color-text);
  background: var(--color-panel-soft);
}

.tutorial-side-index a span {
  width: 26px;
  height: 26px;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  border-radius: var(--radius-pill);
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  font: 750 10px var(--font-mono);
}

.tutorial-index-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--color-border);
}

.tutorial-index-note .badge-dot {
  margin-top: 7px;
}

.tutorial-index-note p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 12px;
}

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

.tutorial-step {
  min-width: 0;
  padding-top: 28px;
  padding-bottom: 74px;
  border-bottom: 1px solid var(--color-border);
}

.tutorial-step:first-child {
  padding-top: 0;
}

.tutorial-step-head {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 30px;
}

.tutorial-step-mark {
  min-width: 68px;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  color: var(--color-panel);
  background: var(--color-text);
  font-size: 12px;
  font-weight: 800;
}

.tutorial-step-kicker {
  margin-bottom: 6px;
  color: var(--color-accent-dark);
  font: 750 10px var(--font-mono);
  letter-spacing: 0.13em;
}

.tutorial-step-head h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 44px);
}

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

.tutorial-action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
}

.tutorial-text-link {
  color: var(--color-accent-dark);
  font-weight: 750;
}

.tutorial-platform-list {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.tutorial-platform {
  min-width: 0;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: 0 16px 46px var(--color-shadow);
}

.tutorial-platform:nth-child(even) {
  background: var(--color-panel-soft);
}

.tutorial-platform-title {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.tutorial-platform-title .platform-icon {
  margin-bottom: 0;
}

.tutorial-platform-title p {
  margin-bottom: 2px;
  color: var(--color-text-faint);
  font: 700 10px var(--font-mono);
  letter-spacing: 0.1em;
}

.tutorial-platform-title h3 {
  margin-bottom: 0;
  font-size: 24px;
}

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

.tutorial-check-panel {
  margin-top: 32px;
  padding: clamp(22px, 4vw, 32px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-success-soft);
}

.tutorial-check-panel h3 {
  font-size: 22px;
}

.tutorial-check-panel .check-list {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.tutorial-check-panel .check-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.tutorial-promo {
  margin-bottom: 0;
}

@media (max-width: 1040px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
  }

  .tutorial-route-card {
    width: min(570px, 100%);
    transform: none;
  }

  .tutorial-document {
    grid-template-columns: 1fr;
  }

  .tutorial-side-index {
    display: none;
  }

  .tutorial-prose {
    width: min(820px, 100%);
    margin-inline: auto;
  }
}

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

  .tutorial-route-heading {
    align-items: flex-start;
  }

  .tutorial-document {
    padding-top: 24px;
  }

  .tutorial-step {
    padding-bottom: 58px;
  }

  .tutorial-prose > .tutorial-step > p,
  .tutorial-platform p {
    font-size: 16px;
    line-height: 1.82;
  }
}

@media (max-width: 520px) {
  .tutorial-route-body {
    padding: 22px 18px;
  }

  .tutorial-route-heading {
    flex-direction: column;
  }

  .tutorial-step-head {
    display: block;
  }

  .tutorial-step-mark {
    margin-bottom: 14px;
  }

  .tutorial-action-row .button {
    width: 100%;
  }

  .tutorial-action-row .muted {
    width: 100%;
    font-size: 13px;
  }

  .tutorial-platform {
    padding: 20px 18px;
  }

  .tutorial-platform-title {
    align-items: flex-start;
  }

  .tutorial-flow-item {
    grid-template-columns: 40px minmax(0, 1fr);
  }

  .tutorial-flow-node {
    width: 40px;
    height: 40px;
  }

  .tutorial-flow-line {
    margin-left: 19px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tutorial-route-card {
    transform: none;
  }
}