.tutorial-hero {
  overflow: hidden;
  background: var(--color-mist);
}

.tutorial-hero::before {
  position: absolute;
  top: 12%;
  right: -10%;
  width: 46%;
  height: 76%;
  border-radius: var(--radius-pill);
  background: var(--color-mint);
  content: "";
  opacity: .72;
  transform: rotate(-12deg);
}

.tutorial-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: calc(100svh - var(--header-height));
  grid-template-columns: minmax(0, 1.02fr) minmax(380px, .98fr);
  align-items: center;
  gap: clamp(42px, 7vw, 100px);
  padding-top: clamp(64px, 9vw, 118px);
  padding-bottom: clamp(72px, 10vw, 132px);
}

.tutorial-hero-copy {
  max-width: 650px;
}

.tutorial-hero-copy h1 {
  max-width: 640px;
  margin-top: 18px;
}

.tutorial-lead {
  max-width: 610px;
  margin-bottom: 28px;
  color: var(--color-muted);
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.85;
}

.tutorial-facts {
  margin-top: 30px;
}

.tutorial-route {
  position: relative;
  padding: clamp(18px, 3vw, 34px);
}

.tutorial-route::before,
.tutorial-route::after {
  position: absolute;
  border-radius: var(--radius-pill);
  background: var(--color-brand);
  content: "";
}

.tutorial-route::before {
  top: 4px;
  right: 2px;
  width: 18px;
  height: 18px;
}

.tutorial-route::after {
  bottom: 12%;
  left: 0;
  width: 10px;
  height: 10px;
  background: var(--color-amber);
}

.route-board {
  position: relative;
  overflow: hidden;
  padding: clamp(25px, 4vw, 42px);
  border-radius: var(--radius-large);
  background: var(--color-board);
  color: var(--color-surface);
  box-shadow: 0 30px 70px var(--color-chip-shadow-b);
  transform: rotate(3deg);
}

.route-board::before {
  position: absolute;
  inset: 18px;
  border: 1px solid var(--color-board-highlight);
  border-radius: var(--radius-medium);
  content: "";
  pointer-events: none;
}

.route-head {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 30px;
  color: var(--color-pin);
  font: 11px/1.5 var(--font-mono);
  letter-spacing: .1em;
}

.route-head code {
  color: var(--color-surface);
}

.route-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.route-list::before {
  position: absolute;
  top: 28px;
  bottom: 28px;
  left: 23px;
  width: 2px;
  background: var(--color-brand);
  content: "";
  opacity: .7;
}

.route-list li {
  position: relative;
  display: grid;
  grid-template-columns: 48px 1fr;
  align-items: center;
  gap: 17px;
  min-height: 82px;
}

.route-index {
  position: relative;
  z-index: 1;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: var(--radius-small);
  background: var(--color-surface);
  color: var(--color-brand-deep);
  font: 700 12px/1 var(--font-mono);
}

.route-list strong {
  display: block;
  color: var(--color-surface);
  font-size: 18px;
}

.route-list small {
  color: var(--color-pin);
  font: 11px/1.6 var(--font-mono);
  letter-spacing: .05em;
}

.tutorial-intro {
  padding-top: 42px;
  padding-bottom: 52px;
}

.tutorial-platform-note {
  margin-top: 0;
  margin-bottom: 30px;
}

.tutorial-platform-note p {
  color: var(--color-muted);
}

.tutorial-kicker {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--color-brand-deep);
  font: 700 12px/1.5 var(--font-mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 42px;
}

.section-heading > p {
  color: var(--color-muted);
  font-size: 17px;
}

.tutorial-preparation {
  scroll-margin-top: 90px;
}

.prep-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, .88fr);
  gap: 24px;
  align-items: start;
}

.prep-main p {
  color: var(--color-muted);
}

.prep-checks {
  display: grid;
  gap: 16px;
}

.prep-checks .card {
  position: relative;
  padding-left: 76px;
}

.prep-checks h3 {
  font-size: 19px;
}

.prep-checks p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.prep-number {
  position: absolute;
  top: 24px;
  left: 22px;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: var(--radius-small);
  background: var(--color-brand);
  color: var(--color-surface);
  font: 700 13px/1 var(--font-mono);
}

.guide-step {
  scroll-margin-top: 80px;
}

.step-grid {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr) minmax(210px, 260px);
  align-items: start;
  gap: clamp(24px, 4vw, 54px);
}

.step-marker {
  position: sticky;
  top: 26px;
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 18px 10px;
  border-radius: var(--radius-medium);
  background: var(--color-brand);
  color: var(--color-surface);
  box-shadow: var(--shadow-button);
}

.step-marker span {
  font: 800 28px/1 var(--font-mono);
}

.step-marker small {
  color: var(--color-surface);
  font: 10px/1.4 var(--font-mono);
  letter-spacing: .1em;
  opacity: .78;
  writing-mode: vertical-rl;
}

.step-content {
  max-width: 760px;
}

.step-content h2 {
  scroll-margin-top: 100px;
}

.step-content p {
  color: var(--color-muted);
}

.step-content > p:first-of-type {
  color: var(--color-ink);
  font-size: 17px;
}

.step-summary {
  position: sticky;
  top: 26px;
  padding: 22px;
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.step-summary strong {
  display: block;
  margin-bottom: 12px;
  color: var(--color-brand-deep);
  font-family: var(--font-display);
}

.step-summary ul {
  display: grid;
  gap: 10px;
  margin-bottom: 0;
  padding-left: 20px;
  color: var(--color-muted);
  font-size: 14px;
}

.mode-comparison {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 30px 0 38px;
}

.mode-comparison article {
  padding: 22px;
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.mode-comparison code {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--color-brand-deep);
  font-size: 12px;
  letter-spacing: .08em;
}

.mode-comparison h3 {
  font-size: 18px;
}

.mode-comparison p {
  margin-bottom: 0;
  font-size: 14px;
}

.verify-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 30px 0 38px;
}

.verify-list .card {
  box-shadow: var(--shadow-card);
}

.verify-list h3 {
  margin-top: 12px;
  font-size: 20px;
}

.verify-list p {
  margin-bottom: 0;
}

.verify-state {
  display: inline-flex;
  padding: 6px 11px;
  border-radius: var(--radius-pill);
  background: var(--color-mint);
  color: var(--color-ink);
  font-size: 12px;
  font-weight: 700;
}

.tutorial-troubleshooting {
  scroll-margin-top: 80px;
}

.troubleshooting-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.diagnostic-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  counter-reset: diagnostic;
  list-style: none;
}

.diagnostic-list li {
  position: relative;
  min-height: 120px;
  padding: 0 0 30px 74px;
  counter-increment: diagnostic;
}

.diagnostic-list li::before {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-brand);
  color: var(--color-surface);
  content: counter(diagnostic);
  font: 700 13px/1 var(--font-mono);
}

.diagnostic-list li::after {
  position: absolute;
  top: 46px;
  bottom: 0;
  left: 22px;
  width: 2px;
  background: var(--color-line-strong);
  content: "";
}

.diagnostic-list li:last-child::after {
  display: none;
}

.diagnostic-list h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.diagnostic-list p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.troubleshooting-links {
  position: sticky;
  top: 26px;
}

.troubleshooting-links > p {
  color: var(--color-muted);
}

.resource-links {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.resource-links a {
  display: grid;
  gap: 3px;
  padding: 14px;
  border-radius: var(--radius-small);
  background: var(--color-mist);
  color: var(--color-ink);
  text-decoration: none;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.resource-links a:hover {
  background: var(--color-mint);
  color: var(--color-ink);
  transform: translateX(2px);
}

.resource-links span {
  color: var(--color-muted);
  font-size: 13px;
}

.finish-panel {
  display: grid;
  grid-template-columns: minmax(260px, .8fr) minmax(0, 1.2fr);
  gap: clamp(30px, 6vw, 80px);
  padding: clamp(28px, 5vw, 56px);
  border-radius: var(--radius-large);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.finish-copy p {
  color: var(--color-muted);
}

.finish-copy .button-row {
  margin-top: 28px;
}

@media (max-width: 1050px) {
  .tutorial-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(340px, .8fr);
    gap: 34px;
  }

  .step-grid {
    grid-template-columns: 70px minmax(0, 1fr);
  }

  .step-summary {
    position: static;
    grid-column: 2;
  }

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

@media (max-width: 860px) {
  .tutorial-hero::before {
    top: auto;
    right: -20%;
    bottom: -8%;
    width: 84%;
    height: 46%;
  }

  .tutorial-hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .tutorial-route {
    width: min(100%, 560px);
    margin-inline: auto;
  }

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

  .troubleshooting-links {
    position: static;
  }

  .finish-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .tutorial-hero-grid {
    padding-top: 48px;
    padding-bottom: 70px;
  }

  .tutorial-route {
    padding: 8px;
  }

  .route-board {
    transform: none;
  }

  .step-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .step-marker {
    position: static;
    display: inline-flex;
    width: max-content;
    align-items: center;
    justify-items: initial;
    padding: 12px 16px;
  }

  .step-marker span {
    font-size: 20px;
  }

  .step-marker small {
    writing-mode: initial;
  }

  .step-summary {
    grid-column: 1;
  }

  .verify-list {
    grid-template-columns: 1fr;
  }

  .prep-checks .card {
    padding-left: 70px;
  }
}

@media (max-width: 480px) {
  .tutorial-hero-copy .button-row {
    align-items: stretch;
    flex-direction: column;
  }

  .tutorial-hero-copy .button {
    width: 100%;
  }

  .route-board {
    padding: 24px 20px;
  }

  .route-head {
    display: grid;
  }

  .route-list li {
    grid-template-columns: 42px 1fr;
    gap: 13px;
  }

  .route-list::before {
    left: 20px;
  }

  .route-index {
    width: 42px;
    height: 42px;
  }

  .prep-checks .card {
    padding-top: 76px;
    padding-left: 21px;
  }

  .diagnostic-list li {
    padding-left: 62px;
  }

  .finish-panel {
    padding: 24px 21px;
  }
}