.tutorial-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border-soft);
  background:
    radial-gradient(circle at 78% 35%, var(--color-glow-green), transparent 24rem),
    linear-gradient(145deg, var(--color-canvas), var(--color-canvas-deep));
}

.tutorial-hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(var(--color-border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.13;
  mask-image: linear-gradient(90deg, transparent, var(--color-white));
}

.tutorial-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
  gap: 72px;
  align-items: center;
  min-height: 650px;
  padding-top: 72px;
  padding-bottom: 78px;
}

.tutorial-hero-copy {
  max-width: 760px;
}

.tutorial-hero-copy .lead {
  margin-bottom: 28px;
}

.tutorial-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.setup-route {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-window);
}

.setup-route::after {
  position: absolute;
  top: 68px;
  bottom: 68px;
  left: 34px;
  width: 1px;
  content: "";
  background: linear-gradient(var(--color-accent-bright), var(--color-success));
}

.setup-route-head,
.setup-route-foot {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  min-height: 54px;
  padding-inline: 18px;
  background: var(--color-panel-raised);
}

.setup-route-head {
  justify-content: space-between;
  gap: 14px;
  border-bottom: 1px solid var(--color-border-soft);
  color: var(--color-text-muted);
  font-size: 11px;
}

.setup-route-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 12px;
  list-style: none;
}

.setup-route-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 66px;
  padding: 10px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.setup-route-list li:hover {
  border-color: var(--color-border);
  background: var(--color-panel-raised);
}

.setup-route-node {
  position: relative;
  z-index: 2;
  flex: 0 0 auto;
  width: 15px;
  height: 15px;
  border: 3px solid var(--color-panel);
  border-radius: 50%;
  background: var(--color-success);
  box-shadow:
    0 0 0 1px var(--color-success),
    0 0 15px var(--color-success);
}

.setup-route-list div {
  display: grid;
  gap: 2px;
}

.setup-route-list strong {
  font-size: 14px;
}

.setup-route-list span {
  color: var(--color-text-faint);
  font-size: 11px;
}

.setup-route-foot {
  border-top: 1px solid var(--color-border-soft);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.tutorial-body {
  padding-top: 54px;
  padding-bottom: 104px;
}

.tutorial-body > .callout {
  max-width: 980px;
  margin: 0 auto 62px;
}

.tutorial-step {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  max-width: 1050px;
  margin-inline: auto;
  padding-top: 48px;
  padding-bottom: 68px;
  border-bottom: 1px solid var(--color-border-soft);
}

.tutorial-step-last {
  border-bottom: 0;
}

.tutorial-step-rail {
  position: relative;
  padding-top: 8px;
}

.tutorial-step-rail::before {
  position: absolute;
  top: 43px;
  bottom: -69px;
  left: 20px;
  width: 1px;
  content: "";
  background: linear-gradient(var(--color-accent), var(--color-border-soft));
}

.tutorial-step-last .tutorial-step-rail::before {
  display: none;
}

.tutorial-step-word {
  position: sticky;
  top: var(--toc-offset);
  display: grid;
  width: 42px;
  min-height: 42px;
  place-items: center;
  border: 1px solid var(--color-success);
  border-radius: var(--radius-sm);
  color: var(--color-success);
  background: var(--color-panel);
  box-shadow: 0 0 22px var(--color-glow-green);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  writing-mode: vertical-rl;
  letter-spacing: 0.12em;
}

.tutorial-step-content {
  max-width: 820px;
}

.tutorial-step-content h2 {
  max-width: 720px;
}

.tutorial-step-content .button-row {
  margin-top: 28px;
}

.platform-instructions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
  margin-bottom: 34px;
}

.platform-instruction {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background:
    linear-gradient(145deg, var(--color-panel-raised), var(--color-panel));
  box-shadow: var(--shadow-card);
}

.platform-instruction-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.platform-instruction-head h3 {
  margin-bottom: 0;
  font-size: 22px;
}

.platform-code {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 29px;
  padding-inline: 7px;
  border: 1px solid var(--color-success);
  border-radius: var(--radius-xs);
  color: var(--color-success);
  background: var(--color-success-soft);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 800;
}

.platform-instruction p {
  margin-bottom: 0;
  font-size: 14px;
}

.completion-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  margin-top: 38px;
  padding: 26px;
  border: 1px solid var(--color-accent-bright);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(120deg, var(--color-panel-selected), var(--color-panel));
  box-shadow: var(--shadow-card);
}

.completion-panel div {
  display: grid;
  gap: 7px;
}

.completion-panel .mono {
  color: var(--color-success);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.completion-panel strong {
  font-size: 18px;
}

@media (max-width: 960px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
    gap: 42px;
    min-height: auto;
    padding-top: 62px;
  }

  .setup-route {
    width: 100%;
    max-width: 680px;
  }
}

@media (max-width: 768px) {
  .tutorial-hero-grid {
    padding-top: 48px;
    padding-bottom: 58px;
  }

  .tutorial-body {
    padding-top: 38px;
    padding-bottom: 76px;
  }

  .tutorial-step {
    grid-template-columns: 58px minmax(0, 1fr);
    padding-top: 38px;
    padding-bottom: 52px;
  }

  .tutorial-step-rail::before {
    bottom: -53px;
  }

  .tutorial-step-word {
    top: var(--toc-offset);
  }

  .platform-instructions {
    grid-template-columns: 1fr;
  }

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

  .completion-panel .button {
    justify-self: start;
  }
}

@media (max-width: 640px) {
  .tutorial-hero-grid {
    gap: 34px;
  }

  .setup-route::after {
    left: 29px;
  }

  .setup-route-list {
    padding: 8px;
  }

  .setup-route-list li {
    padding-inline: 10px;
  }

  .tutorial-body > .callout {
    margin-bottom: 42px;
  }

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

  .tutorial-step-rail {
    padding-top: 0;
    padding-bottom: 15px;
  }

  .tutorial-step-rail::before {
    display: none;
  }

  .tutorial-step-word {
    position: static;
    width: auto;
    min-width: 52px;
    min-height: 28px;
    padding-inline: 9px;
    writing-mode: horizontal-tb;
  }

  .platform-instruction {
    padding: 20px;
  }

  .completion-panel {
    padding: 21px;
  }
}