.tutorial-hero {
  position: relative;
  padding-top: clamp(56px, 8vw, 108px);
  padding-bottom: clamp(58px, 8vw, 104px);
  overflow: hidden;
  border-bottom: var(--line-heavy) solid var(--color-accent-dark);
  background-color: var(--color-panel-alt);
  background-image:
    linear-gradient(var(--color-tile-line) var(--line-thin), var(--color-transparent) var(--line-thin)),
    linear-gradient(90deg, var(--color-tile-line) var(--line-thin), var(--color-transparent) var(--line-thin));
  background-size: 32px 32px;
}

.tutorial-hero::after {
  position: absolute;
  right: -8%;
  bottom: -36%;
  width: 54%;
  height: 88%;
  border: var(--line-heavy) solid var(--color-accent);
  background-color: var(--color-water-wash);
  content: "";
  transform: rotate(-7deg);
  pointer-events: none;
}

.tutorial-hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  align-items: center;
  gap: clamp(36px, 7vw, 96px);
}

.tutorial-intro {
  max-width: 820px;
}

.tutorial-intro h1 {
  max-width: 810px;
  margin-bottom: 24px;
  font-size: clamp(48px, 6.7vw, 94px);
}

.tutorial-intro .lead {
  max-width: 710px;
}

.tutorial-intro .button-row {
  margin-top: 30px;
}

.tutorial-facts {
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.tutorial-facts li {
  max-width: 100%;
  padding: 5px 11px;
  overflow: hidden;
  color: var(--color-accent-dark);
  border: var(--line-thin) solid var(--color-border);
  border-radius: var(--radius-pill);
  background-color: var(--color-panel);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  white-space: nowrap;
}

.route-board {
  position: relative;
  border: var(--line-heavy) solid var(--color-accent-dark);
  background-color: var(--color-panel);
}

.route-board::before {
  position: absolute;
  top: calc(var(--line-heavy) * -1);
  left: 0;
  width: 110px;
  height: var(--line-heavy);
  background-color: var(--color-warn);
  content: "";
}

.route-board-header {
  min-height: 42px;
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--color-white);
  background-color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.route-stops {
  margin: 0;
  padding: 0;
  list-style: none;
}

.route-stops li {
  position: relative;
  min-height: 82px;
  padding: 16px 18px;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  border-bottom: var(--line-thin) solid var(--color-border);
}

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

.route-stops li:not(:last-child)::after {
  position: absolute;
  bottom: -8px;
  left: 39px;
  z-index: 2;
  width: 14px;
  height: 14px;
  border-right: var(--line-medium) solid var(--color-accent-dark);
  border-bottom: var(--line-medium) solid var(--color-accent-dark);
  background-color: var(--color-panel);
  content: "";
  transform: rotate(45deg);
}

.route-number {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  color: var(--color-white);
  border-radius: var(--radius-pill);
  background-color: var(--color-warn);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 850;
}

.route-stops strong {
  display: block;
  color: var(--color-text);
  font-size: 16px;
}

.route-stops small {
  display: block;
  margin-top: 2px;
  color: var(--color-text-muted);
  font-size: 12px;
}

.tutorial-nav-section {
  padding-top: 34px;
  padding-bottom: 26px;
  background-color: var(--color-bg);
}

.platform-callout {
  margin-bottom: 0;
}

.platform-callout a {
  color: var(--color-accent-dark);
  font-weight: 850;
  text-decoration: underline;
  text-decoration-color: var(--color-warn);
  text-decoration-thickness: var(--line-medium);
  text-underline-offset: 4px;
}

.preflight-grid {
  margin: 32px 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: var(--line-thin) solid var(--color-border);
  border-left: var(--line-thin) solid var(--color-border);
}

.preflight-item {
  padding: 22px;
  border-right: var(--line-thin) solid var(--color-border);
  border-bottom: var(--line-thin) solid var(--color-border);
  background-color: var(--color-panel);
}

.preflight-item h3 {
  margin-top: 10px;
  font-size: 20px;
}

.preflight-item p {
  margin-bottom: 0;
  font-size: 14px;
}

.tutorial-step {
  border-bottom: var(--line-thin) solid var(--color-border);
}

.step-layout {
  display: grid;
  grid-template-columns: minmax(170px, 0.34fr) minmax(0, 1.66fr);
  align-items: start;
  gap: clamp(30px, 6vw, 88px);
}

.step-marker {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  padding-top: 14px;
  display: grid;
  gap: 9px;
  border-top: var(--line-heavy) solid var(--color-warn);
}

.step-index {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 850;
  line-height: 1;
}

.step-status {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.step-content {
  max-width: var(--reading-width);
  padding-left: clamp(24px, 4vw, 56px);
  border-left: var(--line-medium) solid var(--color-accent-dark);
}

.step-content > h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.step-content ol {
  padding-left: 24px;
}

.step-content ol li::marker {
  color: var(--color-warn);
  font-family: var(--font-mono);
  font-weight: 850;
}

.step-forward {
  margin-top: 40px;
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: var(--line-medium) solid var(--color-border);
}

.step-forward span {
  color: var(--color-text-muted);
  font-size: 11px;
}

.step-forward a {
  font-weight: 850;
}

.mode-board {
  margin: 30px 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: var(--line-medium) solid var(--color-accent-dark);
  border-left: var(--line-medium) solid var(--color-accent-dark);
}

.mode-board article {
  padding: 22px;
  border-right: var(--line-medium) solid var(--color-accent-dark);
  border-bottom: var(--line-medium) solid var(--color-accent-dark);
  background-color: var(--color-panel);
}

.mode-board h3 {
  margin-top: 9px;
  font-size: 20px;
}

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

.verification-lanes {
  margin: 32px 0;
  border-top: var(--line-medium) solid var(--color-accent-dark);
}

.verification-lanes article {
  padding: 20px;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: start;
  gap: 17px;
  border-right: var(--line-medium) solid var(--color-accent-dark);
  border-bottom: var(--line-medium) solid var(--color-accent-dark);
  border-left: var(--line-medium) solid var(--color-accent-dark);
  background-color: var(--color-panel);
}

.verification-lanes h3 {
  margin-bottom: 6px;
  font-size: 19px;
}

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

.verification-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--color-white);
  border-radius: var(--radius-pill);
  background-color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-weight: 850;
}

.tutorial-end-actions {
  margin-top: clamp(42px, 7vw, 82px);
  padding: clamp(24px, 5vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
  border: var(--line-heavy) solid var(--color-accent-dark);
  background-color: var(--color-panel-alt);
}

.tutorial-end-actions h2 {
  margin-top: 10px;
  margin-bottom: 10px;
  font-size: clamp(28px, 4vw, 44px);
}

.tutorial-end-actions p {
  max-width: 700px;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

@media (max-width: 940px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
  }

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

  .preflight-grid,
  .mode-board {
    grid-template-columns: 1fr;
  }

  .step-layout {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 28px;
  }

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

@media (max-width: 680px) {
  .tutorial-hero {
    padding-top: 44px;
    padding-bottom: 58px;
  }

  .tutorial-hero::after {
    right: -38%;
    bottom: -28%;
    width: 92%;
    height: 54%;
  }

  .tutorial-intro h1 {
    font-size: clamp(44px, 14vw, 64px);
  }

  .tutorial-facts {
    align-items: flex-start;
    flex-direction: column;
  }

  .route-board-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .step-layout {
    grid-template-columns: 1fr;
  }

  .step-marker {
    position: relative;
    top: auto;
    grid-template-columns: auto 1fr;
    align-items: end;
  }

  .step-content {
    padding-left: 0;
    border-left: 0;
  }

  .step-forward {
    align-items: flex-start;
    flex-direction: column;
  }

  .verification-lanes article {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 13px;
    padding: 17px;
  }

  .verification-mark {
    width: 38px;
    height: 38px;
  }
}

@media (max-width: 420px) {
  .route-stops li {
    grid-template-columns: 42px minmax(0, 1fr);
    padding-right: 12px;
    padding-left: 12px;
  }

  .route-stops li:not(:last-child)::after {
    left: 31px;
  }

  .tutorial-facts li {
    white-space: normal;
  }

  .tutorial-end-actions {
    padding: 20px;
  }
}