:root {
  --tutorial-hero-space-top: 76px;
  --tutorial-hero-space-bottom: 54px;
  --tutorial-flow-space-bottom: 96px;
  --tutorial-step-space: 72px;
  --tutorial-rule-width: 3px;
  --tutorial-marker-size: 42px;
  --tutorial-platform-gap: 1rem;
  --tutorial-panel-padding: clamp(1.15rem, 3vw, 1.7rem);
  --tutorial-action-gap: 1.25rem;
  --tutorial-code-min: 34rem;
  --tutorial-letter-bg: var(--color-panel-raised);
  --tutorial-finish-bg: var(--color-panel);
}

.tutorial-hero {
  position: relative;
  overflow-x: clip;
  padding-top: var(--tutorial-hero-space-top);
  padding-bottom: var(--tutorial-hero-space-bottom);
  border-bottom: 1px solid var(--color-border);
}

.tutorial-hero::after {
  content: "";
  position: absolute;
  right: -12rem;
  bottom: -17rem;
  width: 31rem;
  height: 31rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  pointer-events: none;
}

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

.tutorial-hero h1 {
  margin: 1.25rem 0 1rem;
}

.tutorial-hero .lead {
  margin-bottom: 1.35rem;
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
}

.tutorial-facts span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text-muted);
  padding: .35rem .78rem;
  font-size: .82rem;
}

.tutorial-facts span::before {
  content: "";
  width: .42rem;
  height: .42rem;
  flex: 0 0 auto;
  margin-right: .48rem;
  border-radius: var(--radius-pill);
  background: var(--color-success);
}

.tutorial-flow {
  padding-bottom: var(--tutorial-flow-space-bottom);
}

.tutorial-toc {
  margin-top: 1.35rem;
}

.tutorial-intro {
  padding-top: 2rem;
  color: var(--color-text-muted);
}

.tutorial-intro .callout a,
.tutorial-step a:not(.btn),
.tutorial-finish p a {
  color: var(--color-accent-soft);
  text-decoration: underline;
  text-underline-offset: .2em;
}

.tutorial-step {
  position: relative;
  padding-top: var(--tutorial-step-space);
}

.tutorial-step::before {
  content: "";
  position: absolute;
  top: var(--tutorial-step-space);
  bottom: 0;
  left: 0;
  width: var(--tutorial-rule-width);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

.tutorial-step > p,
.tutorial-step > pre,
.tutorial-step > aside,
.tutorial-step > .platform-instructions,
.tutorial-step > .step-action {
  margin-left: 1.5rem;
}

.step-heading {
  position: relative;
  padding-left: 1.5rem;
}

.step-heading::before {
  content: "";
  position: absolute;
  top: .25rem;
  left: calc((var(--tutorial-marker-size) / -2) + (var(--tutorial-rule-width) / 2));
  width: var(--tutorial-marker-size);
  height: var(--tutorial-marker-size);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  box-shadow: 0 0 0 5px var(--color-accent-ring);
}

.step-kicker {
  display: block;
  margin-bottom: .45rem;
  color: var(--color-accent-soft);
  font-size: .78rem;
  font-weight: 750;
  letter-spacing: .12em;
}

.step-heading h2 {
  margin-bottom: 1.2rem;
}

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

.tutorial-step > p strong {
  color: var(--color-text);
}

.tutorial-step pre {
  min-width: 0;
  margin-top: 1.4rem;
  margin-bottom: 1.4rem;
}

.tutorial-step pre code {
  display: block;
  min-width: var(--tutorial-code-min);
}

.step-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tutorial-action-gap);
  margin-top: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-panel);
  padding: 1rem;
}

.step-action div {
  display: grid;
  gap: .2rem;
}

.step-action strong {
  color: var(--color-text);
  font-size: .88rem;
}

.step-action span {
  color: var(--color-text-muted);
  font-size: .82rem;
}

.step-action .btn {
  flex: 0 0 auto;
}

.platform-instructions {
  display: grid;
  gap: var(--tutorial-platform-gap);
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
}

.platform-guide {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
  padding: var(--tutorial-panel-padding);
}

.platform-guide:nth-child(even) {
  background: var(--color-panel-raised);
}

.platform-guide-head {
  display: flex;
  align-items: center;
  gap: .8rem;
  margin-bottom: .8rem;
}

.platform-guide-head h3 {
  margin-bottom: 0;
}

.platform-letter {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--tutorial-letter-bg);
  color: var(--color-accent-soft);
  font-weight: 800;
}

.platform-guide p {
  margin-bottom: .75rem;
  color: var(--color-text-muted);
}

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

.tutorial-finish {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-top: var(--tutorial-step-space);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--tutorial-finish-bg);
  padding: clamp(1.4rem, 4vw, 2.4rem);
}

.tutorial-finish h2 {
  margin-top: .9rem;
  margin-bottom: .7rem;
  font-size: clamp(1.75rem, 4vw, 2.65rem);
}

.tutorial-finish p {
  max-width: 43rem;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.tutorial-finish .btn {
  flex: 0 0 auto;
}

@media (max-width: 768px) {
  :root {
    --tutorial-hero-space-top: 48px;
    --tutorial-hero-space-bottom: 42px;
    --tutorial-flow-space-bottom: 72px;
    --tutorial-step-space: 56px;
  }

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

  .tutorial-step::before {
    left: .4rem;
  }

  .step-heading {
    padding-left: 2.1rem;
  }

  .step-heading::before {
    left: calc((var(--tutorial-marker-size) / -2) + .4rem);
  }

  .tutorial-step > p,
  .tutorial-step > pre,
  .tutorial-step > aside,
  .tutorial-step > .platform-instructions,
  .tutorial-step > .step-action {
    margin-left: 2.1rem;
  }

  .step-action,
  .tutorial-finish {
    align-items: flex-start;
    flex-direction: column;
  }

  .tutorial-step pre {
    max-width: calc(100% - 2.1rem);
    overflow-x: auto;
  }
}

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

  .tutorial-facts span {
    width: 100%;
  }

  .tutorial-step::before,
  .step-heading::before {
    display: none;
  }

  .step-heading {
    padding-left: 0;
  }

  .tutorial-step > p,
  .tutorial-step > pre,
  .tutorial-step > aside,
  .tutorial-step > .platform-instructions,
  .tutorial-step > .step-action {
    margin-left: 0;
  }

  .tutorial-step pre {
    max-width: 100%;
  }

  .step-action .btn,
  .tutorial-finish .btn {
    width: 100%;
  }
}