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

.tutorial-hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 24%, var(--color-accent-soft), transparent 42%),
    linear-gradient(90deg, transparent, var(--color-table-stripe), transparent);
  content: "";
}

.tutorial-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  min-height: 620px;
}

.tutorial-hero-copy {
  min-width: 0;
}

.tutorial-hero-copy .eyebrow {
  margin-top: 1.4rem;
}

.tutorial-lead {
  max-width: 58ch;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
}

.tutorial-hero-actions {
  margin-top: 2rem;
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.5rem;
}

.tutorial-route {
  position: relative;
  min-width: 0;
  overflow: hidden;
  padding: 1.5rem;
}

.tutorial-route::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(var(--color-border) 0.55px, transparent 0.55px);
  background-size: 6px 6px;
  opacity: 0.2;
  content: "";
}

.tutorial-route > * {
  position: relative;
  z-index: 1;
}

.tutorial-route-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.8rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}

.tutorial-route-svg {
  width: 100%;
  height: auto;
  margin-top: 1rem;
}

.tutorial-route-groove {
  fill: none;
  stroke: var(--color-border-strong);
  stroke-linecap: round;
  stroke-width: 8;
}

.tutorial-route-line {
  fill: none;
  stroke: var(--color-accent);
  stroke-linecap: round;
  stroke-width: 3;
  filter: drop-shadow(0 0 7px var(--color-accent-glow));
}

.tutorial-route-tick {
  stroke: var(--color-border-strong);
  stroke-width: 1;
}

.tutorial-route-node {
  fill: var(--color-panel-raised);
  stroke: var(--color-accent);
  stroke-width: 3;
  filter: drop-shadow(0 0 6px var(--color-accent-glow));
}

.tutorial-route-labels {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
  margin-top: -1.1rem;
  color: var(--color-text);
  font-weight: 800;
  text-align: center;
}

.tutorial-route-ruler {
  display: flex;
  justify-content: space-between;
  gap: 0.7rem;
  margin-top: 2rem;
  border-top: 1px solid var(--color-border);
  padding-top: 0.8rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.tutorial-document {
  padding-top: calc(var(--section-space) * 0.7);
  padding-bottom: var(--section-space);
}

.tutorial-callout {
  max-width: var(--content-reading);
  margin: 2rem auto 0;
}

.tutorial-step {
  display: grid;
  grid-template-columns: minmax(80px, 0.18fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  max-width: 1080px;
  margin-inline: auto;
  padding-top: calc(var(--section-space) * 0.72);
  padding-bottom: calc(var(--section-space) * 0.72);
  border-bottom: 1px solid var(--color-border);
}

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

.tutorial-step-mark {
  position: sticky;
  top: calc(var(--sticky-offset) + 68px);
  align-self: start;
  border-top: 2px solid var(--color-accent);
  padding-top: 0.7rem;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.tutorial-step-body {
  min-width: 0;
  max-width: var(--content-reading);
}

.tutorial-step-body h2 {
  margin-bottom: 1.4rem;
}

.tutorial-step-body p {
  margin-bottom: 1.2rem;
}

.tutorial-step-body .btn {
  margin-top: 0.6rem;
  text-decoration: none;
}

.tutorial-step-body .button-row {
  margin-top: 1.4rem;
}

.tutorial-platform-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.8rem;
  margin-bottom: 1.8rem;
}

.tutorial-platform-card {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  padding: 1.4rem;
  box-shadow: var(--shadow-card);
  transform-style: preserve-3d;
  transition: border-color var(--transition-base), transform var(--transition-base);
  will-change: transform;
}

.tutorial-platform-card:hover {
  border-color: var(--color-accent);
}

.tutorial-platform-card h3 {
  margin-top: 1rem;
  font-size: 1.15rem;
}

.tutorial-platform-card p {
  margin-bottom: 0;
  font-size: 0.92rem;
}

.tutorial-complete {
  margin-top: 2rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.tutorial-complete h3 {
  margin-top: 0.7rem;
}

.tutorial-complete p {
  max-width: 58ch;
}

@media (max-width: 960px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .tutorial-route {
    max-width: 720px;
    width: 100%;
    margin-inline: auto;
  }
}

@media (max-width: 768px) {
  .tutorial-step {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .tutorial-step-mark {
    position: static;
    width: fit-content;
    min-width: 76px;
  }

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

@media (max-width: 640px) {
  .tutorial-hero-grid {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }

  .tutorial-route {
    padding: 1rem;
  }

  .tutorial-route-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.35rem;
  }

  .tutorial-route-labels {
    margin-top: -0.5rem;
    font-size: 0.8rem;
  }

  .tutorial-route-ruler {
    flex-wrap: wrap;
  }

  .tutorial-step {
    padding-top: calc(var(--section-space) * 0.62);
    padding-bottom: calc(var(--section-space) * 0.62);
  }

  .tutorial-platform-card[data-tilt] {
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tutorial-platform-card {
    transition: none;
  }

  .tutorial-platform-card:hover,
  .tutorial-platform-card[data-tilt] {
    transform: none;
  }
}