:root {
  --tutorial-rail-width: 156px;
  --tutorial-route-gap: 10px;
  --tutorial-anchor-offset: calc(var(--header-height) + 22px);
}

.tutorial-hero {
  position: relative;
  padding-top: clamp(70px, 9vw, 118px);
  padding-bottom: clamp(54px, 8vw, 96px);
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  background: var(--gradient-panel);
  text-align: center;
}

.tutorial-hero__glow {
  position: absolute;
  top: -190px;
  left: 50%;
  width: min(980px, 100%);
  height: 620px;
  border-radius: var(--radius-pill);
  background: var(--gradient-glow-amber);
  pointer-events: none;
  transform: translateX(-50%);
}

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

.tutorial-hero h1 {
  max-width: 920px;
  margin-inline: auto;
  font-size: clamp(34px, 7vw, 48px);
}

.tutorial-hero__lead {
  max-width: 760px;
  margin: 0 auto 30px;
  color: var(--color-text-muted);
}

.tutorial-route {
  display: grid;
  max-width: 920px;
  margin: 48px auto 0;
  padding: 10px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--tutorial-route-gap);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.tutorial-route a {
  display: flex;
  min-height: 78px;
  padding: 14px;
  align-items: center;
  gap: 11px;
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  text-align: left;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.tutorial-route a:hover {
  background: var(--color-panel-strong);
  color: var(--color-text);
  transform: translateY(-2px);
}

.tutorial-route span {
  display: inline-flex;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
}

.tutorial-route strong {
  color: inherit;
  font-size: 14px;
}

.tutorial-toc {
  margin-inline: auto;
}

.tutorial-platform-note {
  max-width: 920px;
  margin: 28px auto 0;
}

#before-start,
#import-subscription,
#choose-mode,
#connect,
#verify,
#quick-recovery {
  scroll-margin-top: var(--tutorial-anchor-offset);
}

.tutorial-prose a,
.tutorial-step__body p a,
.callout a {
  color: var(--color-accent-dark);
  font-weight: 750;
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 4px;
}

.setup-checks {
  display: grid;
  margin-top: 34px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.setup-checks__number {
  display: inline-flex;
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
}

.setup-checks h3 {
  font-size: 20px;
}

.tutorial-step__layout {
  display: grid;
  grid-template-columns: var(--tutorial-rail-width) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 50px);
  align-items: start;
}

.tutorial-step__rail {
  position: sticky;
  top: calc(var(--header-height) + 28px);
  display: flex;
  padding-top: 14px;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.tutorial-step__rail::after {
  width: 1px;
  height: 112px;
  background: var(--color-border);
  content: "";
}

.tutorial-step__number {
  display: inline-flex;
  width: 76px;
  height: 76px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: linear-gradient(var(--color-bg), var(--color-bg)) padding-box, var(--gradient-brand) border-box;
  box-shadow: var(--shadow-card);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 800;
}

.tutorial-step__status {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
  text-align: center;
}

.tutorial-step__body {
  padding: clamp(26px, 5vw, 58px);
}

.tutorial-step__body > p {
  color: var(--color-text-muted);
}

.tutorial-step__body > .lead {
  max-width: 800px;
  margin-bottom: 34px;
}

.platform-instructions {
  display: grid;
  margin-block: 36px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.platform-instructions > section {
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
}

.platform-instructions h3 {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
  font-size: 22px;
}

.platform-instructions p {
  color: var(--color-text-muted);
}

.mode-board {
  display: grid;
  margin-block: 34px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.mode-board__item {
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.mode-board__item h3 {
  margin-top: 18px;
  font-size: 20px;
}

.mode-board__item p {
  color: var(--color-text-muted);
  font-size: 14px;
}

.tutorial-step__next {
  display: flex;
  margin-top: 42px;
  padding-top: 24px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--color-border);
}

.tutorial-step__next span {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.tutorial-step__next a {
  color: var(--color-accent-dark);
  font-weight: 800;
}

.verification-grid {
  display: grid;
  margin-block: 32px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.verification-grid h3 {
  margin-top: 18px;
  font-size: 21px;
}

.recovery-list {
  display: grid;
  padding-left: 0;
  gap: 14px;
  counter-reset: recovery;
  list-style: none;
}

.recovery-list li {
  display: grid;
  padding: 22px 24px;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
  counter-increment: recovery;
}

.recovery-list li::before {
  display: inline-flex;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-text);
  color: var(--color-bg);
  content: counter(recovery, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
}

.recovery-list h3 {
  margin-bottom: 5px;
  font-size: 20px;
}

.recovery-list p {
  color: var(--color-text-muted);
}

.quick-links {
  display: grid;
  margin-top: 42px;
  padding: clamp(24px, 4vw, 38px);
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
}

.quick-links h2 {
  margin-bottom: 8px;
  font-size: clamp(27px, 4vw, 38px);
}

@media (max-width: 880px) {
  .tutorial-route {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .tutorial-step__rail {
    position: static;
    padding-top: 0;
    flex-direction: row;
    justify-content: flex-start;
  }

  .tutorial-step__rail::after {
    width: min(180px, 32vw);
    height: 1px;
  }

  .platform-instructions,
  .mode-board {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (max-width: 640px) {
  .tutorial-hero {
    padding-top: 54px;
    padding-bottom: 58px;
  }

  .tutorial-hero h1 {
    font-size: clamp(24px, 10vw, 30px);
  }

  .tutorial-route {
    margin-top: 34px;
    grid-template-columns: minmax(0, 1fr);
  }

  .tutorial-route a {
    min-height: 62px;
  }

  .setup-checks,
  .verification-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .tutorial-step__number {
    width: 60px;
    height: 60px;
    font-size: 15px;
  }

  .tutorial-step__body {
    padding: 24px 19px;
  }

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

  .recovery-list li {
    padding: 20px 18px;
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 14px;
  }

  .recovery-list li::before {
    width: 42px;
    height: 42px;
  }
}