.tutorial-hero {
  padding-top: clamp(64px, 9vw, 118px);
  padding-bottom: clamp(58px, 8vw, 104px);
  border-bottom: 1px solid var(--color-border);
}

.tutorial-hero h1 {
  max-width: 760px;
}

.tutorial-lead {
  max-width: 720px;
  margin-bottom: 36px;
  color: var(--color-text-muted);
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.75;
}

.tutorial-toc {
  margin-top: 38px;
}

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

.tutorial-copy {
  margin-top: clamp(44px, 7vw, 76px);
}

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

.tutorial-copy > p + p {
  margin-top: 1.4em;
}

.tutorial-copy > .callout,
.tutorial-copy > .mode-comparison,
.tutorial-copy > .verification-list {
  margin-top: 36px;
  margin-bottom: 36px;
}

.preflight-grid {
  display: grid;
  gap: 0;
  margin-top: 42px;
  margin-bottom: 42px;
  border-top: 1px solid var(--color-border);
}

.preflight-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding-top: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
}

.preflight-index {
  color: var(--color-accent);
  font: 600 13px/1.5 var(--font-mono);
}

.preflight-item h3 {
  margin-bottom: 8px;
  font-size: 19px;
}

.preflight-item p {
  color: var(--color-text-muted);
}

.tutorial-steps {
  border-top: 1px solid var(--color-border);
}

.tutorial-step {
  scroll-margin-top: var(--header-height);
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
  border-bottom: 1px solid var(--color-border);
}

.step-heading {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(20px, 4vw, 42px);
  align-items: start;
}

.step-heading h2 {
  max-width: 650px;
  margin-bottom: 0;
}

.step-number {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  color: var(--color-accent-dark);
  font: 600 14px/1 var(--font-mono);
}

.mode-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.mode-item {
  padding-top: 30px;
  padding-bottom: 30px;
}

.mode-item + .mode-item {
  padding-left: 30px;
  border-left: 1px solid var(--color-border);
}

.mode-item:first-child {
  padding-right: 30px;
}

.mode-label {
  margin-bottom: 10px;
  color: var(--color-accent-dark);
  font: 600 12px/1.5 var(--font-mono);
  letter-spacing: .1em;
}

.mode-item h3 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 400;
}

.mode-item p:last-child {
  color: var(--color-text-muted);
}

.verification-list {
  border-top: 1px solid var(--color-border);
}

.verification-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 20px;
  padding-top: 25px;
  padding-bottom: 25px;
  border-bottom: 1px solid var(--color-border);
}

.verification-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-success);
  color: var(--color-white);
  font: 700 15px/1 var(--font-mono);
}

.verification-item h3 {
  margin-bottom: 7px;
  font-size: 18px;
}

.verification-item p {
  color: var(--color-text-muted);
}

.tutorial-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(30px, 7vw, 80px);
  align-items: center;
  margin-top: clamp(64px, 9vw, 100px);
  padding: clamp(28px, 5vw, 48px);
  border-radius: var(--radius-large);
  background: var(--color-panel);
}

.tutorial-next h2 {
  margin-bottom: 12px;
}

.tutorial-next p {
  max-width: 600px;
  color: var(--color-text-muted);
}

@media (max-width: 640px) {
  .tutorial-hero {
    padding-top: 48px;
    padding-bottom: 64px;
  }

  .tutorial-lead {
    font-size: 17px;
  }

  .tutorial-toc {
    border-radius: var(--radius-medium);
  }

  .step-heading {
    grid-template-columns: minmax(0, 1fr);
  }

  .step-number {
    width: 46px;
    height: 46px;
  }

  .tutorial-copy {
    margin-top: 38px;
  }

  .mode-comparison {
    grid-template-columns: minmax(0, 1fr);
  }

  .mode-item + .mode-item {
    padding-left: 0;
    border-top: 1px solid var(--color-border);
    border-left: 0;
  }

  .mode-item:first-child {
    padding-right: 0;
  }

  .preflight-item {
    gap: 16px;
  }

  .tutorial-next {
    grid-template-columns: minmax(0, 1fr);
  }

  .tutorial-next .button-row {
    align-items: stretch;
  }

  .tutorial-next .button {
    width: 100%;
  }
}