.tutorial-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, .92fr);
  gap: 16px;
  padding-top: 28px;
  padding-bottom: 42px;
}

.tutorial-hero-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  padding: clamp(34px, 5vw, 64px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.tutorial-hero-copy h1 {
  margin-top: 20px;
}

.tutorial-hero-lead {
  max-width: 42em;
  color: var(--color-muted);
  font-size: 17px;
  line-height: 1.85;
}

.tutorial-hero-copy .button-row {
  margin-top: 12px;
}

.tutorial-route {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  gap: 0;
  padding: clamp(26px, 4vw, 48px);
  background-image:
    radial-gradient(var(--color-dot) 1px, transparent 1.2px),
    linear-gradient(145deg, var(--color-panel-warm), var(--color-panel-soft));
  background-size: 26px 26px, auto;
}

.route-stage {
  display: grid;
  min-width: 0;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 15px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.route-stage-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: var(--radius-small);
  background: var(--color-accent-12);
  color: var(--color-accent);
}

.route-stage-mark svg {
  width: 24px;
  height: 24px;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.route-stage strong,
.route-stage span {
  display: block;
}

.route-stage strong {
  font-family: var(--font-display);
  font-size: 15px;
}

.route-stage div > span {
  margin-top: 2px;
  color: var(--color-muted);
  font-size: 12px;
}

.route-connector {
  width: 2px;
  height: 22px;
  margin-left: 37px;
  background: var(--color-accent-22);
}

.tutorial-main {
  position: relative;
  padding-top: 18px;
  padding-bottom: 32px;
}

.tutorial-main > .toc-tabs {
  margin-bottom: 52px;
}

.tutorial-intro {
  max-width: 920px;
  margin-inline: auto;
  padding-bottom: 58px;
}

.tutorial-intro .section-head {
  max-width: 760px;
}

.tutorial-intro pre {
  margin-top: 20px;
  margin-bottom: 22px;
}

.tutorial-flow {
  position: relative;
  display: grid;
  gap: 18px;
  max-width: 1040px;
  margin-inline: auto;
}

.tutorial-flow::before {
  position: absolute;
  top: 52px;
  bottom: 52px;
  left: 39px;
  width: 1px;
  content: "";
  background: var(--color-line);
}

.lesson-step {
  position: relative;
  display: grid;
  min-width: 0;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: 24px;
  padding: 34px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.lesson-marker {
  position: relative;
  z-index: 1;
  display: grid;
  width: 80px;
  height: 80px;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: var(--color-panel-warm);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
}

.lesson-content {
  min-width: 0;
  padding-top: 5px;
}

.lesson-content > h2 {
  margin-top: 13px;
  font-size: clamp(28px, 3vw, 39px);
}

.lesson-content > p {
  color: var(--color-muted);
  line-height: 1.9;
}

.lesson-content > p a,
.platform-lesson a,
.next-action a {
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: .16em;
}

.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.platform-lessons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
  margin-bottom: 28px;
}

.platform-lesson {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
  background: var(--color-panel-warm);
}

.platform-lesson h3 {
  color: var(--color-accent-dark);
  font-size: 21px;
}

.platform-lesson p {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.85;
}

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

.next-action-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
  margin-bottom: 30px;
}

.next-action {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 22px;
}

.next-action h3 {
  font-size: 19px;
}

.next-action p {
  color: var(--color-muted);
  font-size: 14px;
}

.next-action a {
  margin-top: auto;
}

.tutorial-closing {
  padding-top: 22px;
  border-top: 1px solid var(--color-line);
}

@media (max-width: 960px) {
  .tutorial-hero {
    grid-template-columns: 1fr;
  }

  .tutorial-route {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
  }

  .route-stage {
    grid-template-columns: 1fr;
    align-content: start;
  }

  .route-connector {
    display: none;
  }

  .next-action-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .tutorial-route {
    grid-template-columns: 1fr 1fr;
  }

  .lesson-step {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 25px;
  }

  .tutorial-flow::before {
    display: none;
  }

  .lesson-marker {
    width: auto;
    height: 34px;
    justify-self: start;
    padding-inline: 14px;
    border-radius: var(--radius-pill);
  }

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

@media (max-width: 640px) {
  .tutorial-hero {
    padding-top: 16px;
    padding-bottom: 30px;
  }

  .tutorial-hero-copy {
    padding: 30px 22px;
  }

  .tutorial-hero-lead {
    font-size: 15px;
  }

  .tutorial-route {
    grid-template-columns: 1fr;
    padding: 18px;
  }

  .route-stage {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .route-stage-mark {
    width: 42px;
    height: 42px;
  }

  .tutorial-main > .toc-tabs {
    margin-bottom: 42px;
  }

  .tutorial-intro {
    padding-bottom: 44px;
  }

  .lesson-step {
    padding: 22px 18px;
  }

  .lesson-content > h2 {
    font-size: clamp(27px, 8vw, 33px);
  }

  .platform-lesson {
    padding: 20px 17px;
  }

  .next-action-grid {
    grid-template-columns: 1fr;
  }

  .lesson-actions .btn {
    width: 100%;
  }
}