.tutorial-hero {
  padding-top: clamp(54px, 8vw, 104px);
  padding-bottom: clamp(46px, 7vw, 88px);
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border-soft);
}

.tutorial-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  align-items: center;
  gap: clamp(34px, 7vw, 92px);
}

.tutorial-hero-copy {
  max-width: 720px;
}

.tutorial-hero-copy h1 {
  margin-bottom: 20px;
}

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

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

.tutorial-route-head {
  min-height: 44px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-panel-deep);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.tutorial-route-head span:last-child {
  color: var(--color-success);
}

.tutorial-route-list {
  margin: 0;
  padding: 20px;
  display: grid;
  list-style: none;
}

.tutorial-route-list li {
  min-height: 48px;
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 42px;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--color-border-soft);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

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

.route-index {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-pill);
  color: var(--color-accent);
  background: var(--color-panel-deep);
}

.tutorial-route-list i {
  width: 42px;
  height: 1px;
  position: relative;
  display: block;
  background: var(--color-border);
}

.tutorial-route-list i::after {
  content: "";
  width: 6px;
  height: 6px;
  position: absolute;
  top: -2px;
  right: 0;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

.tutorial-fact-strip {
  margin-top: 42px;
  padding: 15px 0;
  display: flex;
  align-items: center;
  overflow-x: auto;
  border-top: 1px solid var(--color-border-soft);
  border-bottom: 1px solid var(--color-border-soft);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  -webkit-overflow-scrolling: touch;
}

.tutorial-fact-strip span {
  padding: 0 18px;
  flex: 0 0 auto;
  border-right: 1px solid var(--color-border-soft);
  white-space: nowrap;
}

.tutorial-fact-strip span:first-child {
  padding-left: 0;
}

.tutorial-fact-strip span:last-child {
  border-right: 0;
}

.tutorial-document {
  padding-top: clamp(52px, 7vw, 92px);
  padding-bottom: var(--section-space);
}

.tutorial-document > .callout {
  margin-top: 0;
  margin-bottom: 48px;
}

.tutorial-layout {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  align-items: start;
  gap: clamp(28px, 5vw, 70px);
}

.tutorial-index {
  position: sticky;
  top: var(--toc-offset);
  padding: 18px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.tutorial-index-label {
  display: block;
  margin-bottom: 14px;
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.tutorial-index ol {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 3px;
  list-style: none;
  counter-reset: route-step;
}

.tutorial-index li {
  counter-increment: route-step;
}

.tutorial-index a {
  min-height: 36px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--color-text-muted);
  font-size: 12px;
}

.tutorial-index a::before {
  content: counter(route-step, decimal-leading-zero);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 9px;
}

.tutorial-index a:hover {
  color: var(--color-text);
}

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

.tutorial-step {
  position: relative;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: clamp(22px, 4vw, 48px);
}

.tutorial-step + .tutorial-step {
  padding-top: clamp(78px, 10vw, 132px);
}

.tutorial-step:not(:last-child)::before {
  content: "";
  width: 1px;
  position: absolute;
  top: 44px;
  bottom: -90px;
  left: 45px;
  background: var(--color-border-soft);
}

.tutorial-step-mark {
  min-width: 0;
  padding-top: 5px;
  position: relative;
  z-index: 1;
}

.tutorial-step-mark span {
  display: block;
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  overflow-wrap: anywhere;
}

.tutorial-step-mark i {
  width: 12px;
  height: 12px;
  margin-top: 13px;
  display: block;
  border: 3px solid var(--color-panel);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent-dark);
}

.tutorial-step-body {
  min-width: 0;
  max-width: 820px;
}

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

.tutorial-step-body p {
  margin-bottom: 18px;
  color: var(--color-text-muted);
}

.tutorial-step-body a:not(.button) {
  color: var(--color-success);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.tutorial-action {
  margin-top: 28px;
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.tutorial-action span {
  color: var(--color-text-muted);
  font-size: 12px;
}

.platform-instructions {
  margin-top: 30px;
  display: grid;
  gap: 14px;
}

.platform-instruction {
  min-width: 0;
  padding: clamp(20px, 4vw, 30px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.platform-instruction:nth-child(even) {
  margin-left: clamp(0px, 4vw, 44px);
  background: var(--color-panel-raised);
}

.platform-instruction-head {
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.platform-instruction-head .platform-card-icon {
  margin-bottom: 0;
}

.platform-instruction-head .mono {
  display: block;
  margin-bottom: 2px;
  color: var(--color-text-faint);
  font-size: 8px;
  letter-spacing: 0.1em;
}

.platform-instruction-head h3 {
  margin: 0;
  font-size: 22px;
}

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

.verification-panel {
  margin: 32px 0;
  padding: clamp(22px, 4vw, 32px);
  display: grid;
  grid-template-columns: minmax(180px, 0.7fr) minmax(0, 1.3fr);
  gap: 30px;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-lg);
  background: var(--color-panel-raised);
}

.verification-panel .mono {
  color: var(--color-accent);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.verification-panel h3 {
  margin: 8px 0 0;
  font-size: 24px;
}

.verification-panel .check-list {
  margin: 0;
}

.verification-panel .check-list li {
  background: var(--color-panel-deep);
  color: var(--color-text-muted);
}

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

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

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

  .tutorial-index {
    display: none;
  }
}

@media (max-width: 640px) {
  .tutorial-hero {
    padding-top: 42px;
    padding-bottom: 48px;
  }

  .tutorial-hero-copy .lead {
    font-size: 17px;
  }

  .tutorial-route-list {
    padding: 14px;
  }

  .tutorial-fact-strip {
    margin-top: 30px;
  }

  .tutorial-document {
    padding-top: 46px;
    padding-bottom: 72px;
  }

  .tutorial-document > .callout {
    margin-bottom: 40px;
  }

  .tutorial-step {
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 16px;
  }

  .tutorial-step + .tutorial-step {
    padding-top: 78px;
  }

  .tutorial-step:not(:last-child)::before {
    left: 5px;
    bottom: -58px;
  }

  .tutorial-step-mark {
    padding-top: 11px;
  }

  .tutorial-step-mark span {
    display: none;
  }

  .tutorial-step-mark i {
    margin-top: 0;
  }

  .tutorial-action {
    align-items: stretch;
    flex-direction: column;
  }

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

  .platform-instruction:nth-child(even) {
    margin-left: 0;
  }

  .verification-panel {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }
}

@media (max-width: 390px) {
  .tutorial-route-head {
    gap: 10px;
  }

  .tutorial-route-list li {
    grid-template-columns: 28px minmax(0, 1fr) 28px;
  }

  .tutorial-route-list i {
    width: 28px;
  }

  .platform-instruction {
    padding: 18px;
  }
}