.tutorial-hero {
  position: relative;
  padding-top: clamp(64px, 9vw, 116px);
  padding-bottom: clamp(64px, 8vw, 108px);
  overflow: hidden;
}

.tutorial-hero::before {
  position: absolute;
  top: 14%;
  right: -12%;
  width: min(620px, 58vw);
  height: min(620px, 58vw);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: radial-gradient(closest-side, var(--color-accent-soft), var(--color-accent-clear));
  content: "";
  pointer-events: none;
}

.tutorial-hero::after {
  position: absolute;
  top: 23%;
  right: 4%;
  width: min(390px, 38vw);
  height: min(390px, 38vw);
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-pill);
  content: "";
  opacity: 0.62;
  pointer-events: none;
}

.tutorial-hero .wrap {
  position: relative;
  z-index: 1;
}

.tutorial-hero__content {
  max-width: 760px;
}

.tutorial-hero h1 {
  max-width: 720px;
  margin-bottom: 20px;
}

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

.quick-sequence {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(48px, 8vw, 92px);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
}

.quick-sequence__item {
  display: flex;
  min-height: 116px;
  align-items: center;
  gap: 14px;
  padding: 22px;
  border-right: 1px solid var(--color-border);
  transition: background-color 180ms ease, color 180ms ease;
}

.quick-sequence__item:last-child {
  border-right: 0;
}

.quick-sequence__item:hover {
  background: var(--color-panel-raised);
}

.quick-sequence__index {
  flex-shrink: 0;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
}

.quick-sequence__item strong,
.quick-sequence__item small {
  display: block;
}

.quick-sequence__item strong {
  margin-bottom: 3px;
  color: var(--color-text);
  font-weight: 500;
}

.quick-sequence__item small {
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.5;
}

.tutorial-intro {
  border-top: 1px solid var(--color-border);
}

.tutorial-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 320px);
  gap: clamp(36px, 6vw, 78px);
  align-items: start;
  margin-top: 42px;
}

.tutorial-prose {
  max-width: none;
}

.tutorial-prose .callout {
  scroll-margin-top: 24px;
}

.preflight-panel {
  position: sticky;
  top: 24px;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
}

.preflight-panel h3 {
  margin-bottom: 20px;
}

.check-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 25px;
  color: var(--color-muted);
}

.check-list li::before {
  position: absolute;
  top: 0.62em;
  left: 2px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-xs);
  background: var(--color-accent-soft);
  content: "";
}

.step-section {
  scroll-margin-top: 20px;
}

.step-card {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.step-card:hover {
  border-color: var(--color-accent-dark);
  box-shadow: var(--shadow-hover);
}

.step-card__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  padding: clamp(28px, 5vw, 56px);
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(135deg, var(--color-panel-raised), var(--color-panel));
}

.step-card__head .lede {
  margin-bottom: 0;
}

.step-number {
  display: grid;
  width: 66px;
  height: 66px;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  color: var(--color-accent);
  box-shadow: inset 0 0 18px var(--color-accent-soft);
  font-family: var(--font-mono);
  font-size: 16px;
}

.step-card__body {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.72fr);
  gap: clamp(36px, 6vw, 72px);
  align-items: start;
  padding: clamp(28px, 5vw, 56px);
}

.step-card__body--reverse > :first-child {
  order: 2;
}

.step-card__body--reverse > :last-child {
  order: 1;
}

.step-card__body .prose {
  max-width: none;
}

.step-card__body .prose h3:first-child {
  margin-top: 0;
}

.step-material {
  position: sticky;
  top: 24px;
}

.setting-list {
  display: grid;
  margin: 0;
}

.setting-list > div {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.setting-list > div:first-child {
  padding-top: 0;
}

.setting-list > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.setting-list dt {
  margin-bottom: 5px;
  color: var(--color-muted);
  font-size: 12px;
}

.setting-list dd {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--color-text);
  font-size: 14px;
}

.status-accent {
  color: var(--color-accent);
}

.mode-stack {
  display: grid;
  gap: 10px;
}

.mode-row {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.mode-row.is-selected {
  border-color: var(--color-accent);
  background: var(--color-panel-raised);
  box-shadow: inset 0 0 16px var(--color-accent-soft);
}

.mode-row strong,
.mode-row small {
  display: block;
}

.mode-row strong {
  font-size: 14px;
  font-weight: 500;
}

.mode-row small {
  margin-top: 3px;
  color: var(--color-muted);
  font-size: 11px;
}

.mode-indicator {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
}

.mode-row.is-selected .mode-indicator {
  border-color: var(--color-accent);
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent);
}

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

.connection-flow li {
  position: relative;
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0 13px 30px;
  border-bottom: 1px solid var(--color-border);
  counter-increment: connection-step;
}

.connection-flow li:last-child {
  border-bottom: 0;
}

.connection-flow li::before {
  position: absolute;
  left: 0;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  content: counter(connection-step, decimal-leading-zero);
}

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

.connection-flow strong {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  text-align: right;
}

.connection-flow strong.status-accent {
  color: var(--color-accent);
}

.verify-list {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.verify-list li {
  display: flex;
  align-items: flex-start;
  gap: 13px;
}

.verify-list__mark {
  display: grid;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  place-items: center;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-xs);
  background: var(--color-panel-raised);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
}

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

.verify-list strong {
  font-size: 14px;
  font-weight: 500;
}

.verify-list small {
  margin-top: 3px;
  color: var(--color-muted);
  font-size: 11px;
  line-height: 1.55;
}

.next-step-link {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: flex-end;
  padding: 14px clamp(28px, 5vw, 56px);
  border-top: 1px solid var(--color-border);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  transition: background-color 180ms ease, color 180ms ease;
}

.next-step-link:hover {
  background: var(--color-panel-raised);
  color: var(--color-text);
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.diagnostic-card {
  position: relative;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  transition: border-color 180ms ease, transform 180ms ease;
}

.diagnostic-card:hover {
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
}

.diagnostic-card__code {
  display: inline-flex;
  margin-bottom: 22px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
}

.diagnostic-card h3 {
  margin-bottom: 12px;
}

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

.tutorial-deep-link {
  margin-top: 34px;
}

.tutorial-deep-link a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 920px) {
  .quick-sequence {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .quick-sequence__item:nth-child(2) {
    border-right: 0;
  }

  .quick-sequence__item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--color-border);
  }

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

  .preflight-panel,
  .step-material {
    position: static;
  }

  .step-card__body--reverse > :first-child,
  .step-card__body--reverse > :last-child {
    order: initial;
  }
}

@media (max-width: 640px) {
  .tutorial-hero {
    padding-top: 48px;
    padding-bottom: 64px;
  }

  .tutorial-hero::before {
    top: auto;
    right: -34%;
    bottom: 2%;
    width: 92vw;
    height: 92vw;
  }

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

  .quick-sequence {
    grid-template-columns: 1fr;
    margin-top: 48px;
  }

  .quick-sequence__item,
  .quick-sequence__item:nth-child(2) {
    min-height: 88px;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .quick-sequence__item:last-child {
    border-bottom: 0;
  }

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

  .step-number {
    width: 54px;
    height: 54px;
  }

  .step-card__body {
    padding: 24px;
  }

  .next-step-link {
    justify-content: flex-start;
    padding: 16px 24px;
  }

  .diagnostic-grid {
    grid-template-columns: 1fr;
  }

  .diagnostic-card {
    padding: 24px;
  }
}