.tutorial-hero {
  overflow-x: clip;
}

.tutorial-hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  min-height: 520px;
  padding: clamp(36px, 7vw, 86px);
  align-items: center;
  gap: clamp(42px, 7vw, 92px);
  border-radius: var(--radius-panel-large);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-panel);
}

.tutorial-hero-copy {
  max-width: 680px;
}

.tutorial-hero-copy h1 {
  font-size: clamp(34px, 4vw, 48px);
}

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

.tutorial-route {
  position: relative;
  display: grid;
  margin: 0;
  padding: 0;
  gap: 12px;
  list-style: none;
}

.tutorial-route::before {
  position: absolute;
  top: 38px;
  bottom: 38px;
  left: 25px;
  width: 1px;
  background: var(--color-line);
  content: "";
}

.tutorial-route li {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  padding: 17px 20px;
  align-items: center;
  column-gap: 14px;
  border-radius: var(--radius-card);
  background: var(--color-surface-muted);
}

.tutorial-route li > span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-surface);
  font-family: var(--font-mono);
  font-size: 13px;
}

.tutorial-route strong,
.tutorial-route small {
  grid-column: 2;
}

.tutorial-route strong {
  align-self: end;
  color: var(--color-ink);
}

.tutorial-route small {
  align-self: start;
  color: var(--color-muted);
}

.tutorial-intro-panel {
  min-height: 0;
}

.prepare-list {
  display: grid;
  gap: 12px;
}

.prepare-list > div {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  padding: 20px;
  align-items: start;
  gap: 12px;
  border-radius: var(--radius-card);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.prepare-list .icon-dot {
  margin-top: 9px;
}

.prepare-list p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.prepare-list strong {
  color: var(--color-ink);
}

.tutorial-reading {
  padding-top: clamp(32px, 5vw, 56px);
  color: var(--color-muted);
}

.tutorial-reading p:last-child {
  margin-bottom: 0;
}

.tutorial-step {
  scroll-margin-top: 24px;
}

.tutorial-step:nth-of-type(even) {
  background: var(--color-surface-muted);
}

.tutorial-step-layout {
  display: grid;
  grid-template-columns: 150px minmax(0, var(--reading-width));
  justify-content: center;
  gap: clamp(30px, 6vw, 82px);
}

.tutorial-step-index {
  position: sticky;
  top: 28px;
  display: flex;
  height: max-content;
  padding-top: 8px;
  align-items: flex-start;
  flex-direction: column;
}

.tutorial-step-index span {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: clamp(48px, 6vw, 76px);
  font-weight: 400;
  line-height: 1;
}

.tutorial-step-index small {
  margin-top: 12px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: lowercase;
}

.tutorial-step-body {
  min-width: 0;
}

.tutorial-step-body > .section-marker {
  margin-bottom: 18px;
}

.tutorial-step-body .step-lead {
  margin-bottom: 2.2em;
  color: var(--color-muted);
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.75;
}

.tutorial-step-body h3 {
  margin-top: 1.8em;
}

.verification-sequence {
  display: grid;
  margin: 32px 0;
  padding: 0;
  gap: 12px;
  counter-reset: verification;
  list-style: none;
}

.verification-sequence li {
  position: relative;
  padding: 22px 24px 22px 70px;
  border-radius: var(--radius-card);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  counter-increment: verification;
}

.verification-sequence li::before {
  position: absolute;
  top: 22px;
  left: 22px;
  display: inline-flex;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-surface);
  content: counter(verification);
  font-family: var(--font-mono);
  font-size: 12px;
}

.verification-sequence strong {
  display: block;
  margin-bottom: 5px;
}

.verification-sequence p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.tutorial-finish-panel {
  min-height: 0;
}

.finish-notes {
  display: grid;
  margin-bottom: 28px;
  gap: 22px;
}

.finish-notes section {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-line);
}

.finish-notes section:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.finish-notes h3 {
  margin-bottom: 7px;
  font-size: 22px;
}

.finish-notes p {
  margin-bottom: 0;
  color: var(--color-muted);
}

@media (max-width: 900px) {
  .tutorial-hero-panel {
    grid-template-columns: 1fr;
    min-height: 0;
  }

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

  .tutorial-step-index {
    position: static;
    flex-direction: row;
    align-items: baseline;
    gap: 12px;
  }

  .tutorial-step-index span {
    font-size: 42px;
  }

  .tutorial-step-index small {
    margin-top: 0;
  }
}

@media (max-width: 640px) {
  .tutorial-hero-panel {
    padding: 28px 20px;
    border-radius: var(--radius-card);
  }

  .tutorial-hero-copy h1 {
    font-size: clamp(24px, 7.4vw, 30px);
  }

  .tutorial-route li {
    padding: 14px;
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .tutorial-route li > span {
    width: 44px;
    height: 44px;
  }

  .tutorial-route::before {
    left: 35px;
  }

  .tutorial-step-index span {
    font-size: 36px;
  }

  .verification-sequence li {
    padding: 20px 18px 20px 62px;
  }

  .verification-sequence li::before {
    top: 20px;
    left: 18px;
  }
}