.tutorial-hero {
  position: relative;
  padding-top: clamp(74px, 9vw, 118px);
  padding-bottom: clamp(62px, 8vw, 104px);
  overflow-x: clip;
  background:
    radial-gradient(circle at 76% 28%, var(--color-accent-soft), var(--color-transparent) 34%),
    linear-gradient(var(--color-bg), var(--color-bg));
}

.tutorial-hero::before {
  content: "";
  position: absolute;
  inset: 36% 0 0;
  opacity: 0.68;
  background-image:
    linear-gradient(var(--color-grid-line) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, var(--color-transparent) 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.tutorial-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  align-items: center;
  gap: clamp(42px, 8vw, 100px);
}

.tutorial-hero-copy {
  max-width: 720px;
}

.tutorial-hero h1 {
  max-width: 700px;
  margin-top: 20px;
  margin-bottom: 20px;
}

.tutorial-lead {
  max-width: 660px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

.tutorial-actions {
  justify-content: flex-start;
  margin-top: 28px;
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.setup-map {
  position: relative;
  padding: 26px;
  overflow: hidden;
  border: 1px solid var(--color-device-line);
  border-radius: var(--radius-md);
  background: var(--color-device);
  color: var(--color-device-text);
  box-shadow: var(--shadow-device);
}

.setup-map::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 170px;
  height: 170px;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-pill);
  opacity: 0.6;
}

.setup-map-head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-device-line);
}

.setup-map-head span,
.setup-map-list small {
  color: var(--color-device-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.setup-map-head strong {
  color: var(--color-device-text);
  font-size: 14px;
  font-weight: 550;
}

.setup-map-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.setup-map-list::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 6px;
  width: 1px;
  background: var(--color-device-line);
}

.setup-map-list li {
  position: relative;
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 14px;
  align-items: start;
  min-height: 58px;
  margin: 0;
}

.setup-node {
  position: relative;
  z-index: 1;
  width: 13px;
  height: 13px;
  margin-top: 5px;
  border: 3px solid var(--color-device);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent-line);
}

.setup-map-list strong {
  display: block;
  color: var(--color-device-text);
  font-size: 14px;
  font-weight: 560;
}

.setup-map-list small {
  display: block;
  margin-top: 2px;
}

.tutorial-toc-host {
  position: relative;
  z-index: 30;
  padding-top: 22px;
}

.tutorial-toc-host .toc-tabs {
  margin-bottom: 0;
}

.step-eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--color-accent-dark);
  font-size: 11px;
  letter-spacing: 0.11em;
}

.tutorial-step {
  position: relative;
}

.tutorial-step-muted {
  background: var(--color-panel-secondary);
}

.step-layout {
  display: grid;
  grid-template-columns: 118px minmax(0, 820px);
  justify-content: center;
  gap: clamp(30px, 6vw, 76px);
}

.step-rail {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
  padding-top: 8px;
}

.step-code {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  writing-mode: vertical-rl;
}

.step-line {
  width: 1px;
  min-height: 170px;
  flex: 1;
  background: linear-gradient(var(--color-accent), var(--color-border));
}

.step-content {
  min-width: 0;
}

.step-content > p {
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.9;
}

.step-content > p:first-of-type {
  color: var(--color-text);
}

.inline-link {
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--color-accent-line);
  text-underline-offset: 3px;
}

.step-action-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.step-action-note {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.tutorial-step-dark {
  background: var(--color-device);
  color: var(--color-device-text);
}

.tutorial-step-dark h2,
.tutorial-step-dark h3 {
  color: var(--color-device-text);
}

.tutorial-step-dark .step-eyebrow {
  color: var(--color-scene-light);
}

.tutorial-step-dark .step-code {
  color: var(--color-device-muted);
}

.tutorial-step-dark .step-line {
  background: linear-gradient(var(--color-accent), var(--color-device-line));
}

.tutorial-step-dark .section-heading p {
  color: var(--color-device-muted);
}

.platform-instructions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-device-line);
  border-left: 1px solid var(--color-device-line);
}

.platform-instruction {
  min-width: 0;
  padding: clamp(22px, 4vw, 34px);
  border-right: 1px solid var(--color-device-line);
  border-bottom: 1px solid var(--color-device-line);
}

.platform-instruction-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.platform-letter {
  display: inline-flex;
  width: 42px;
  height: 28px;
  flex: 0 0 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-xs);
  background: var(--color-device-deep);
  color: var(--color-scene-light);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

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

.platform-instruction p {
  color: var(--color-device-muted);
  font-size: 14px;
  line-height: 1.8;
}

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

.import-callout {
  border-color: var(--color-device-line);
  border-left-color: var(--color-accent);
  background: var(--color-device-deep);
  color: var(--color-device-text);
}

.import-callout p {
  color: var(--color-device-muted);
}

.verification-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 42px;
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.verification-band > div {
  min-width: 0;
  padding: 22px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.verification-band span {
  display: block;
  margin-bottom: 16px;
  color: var(--color-accent-dark);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.verification-band strong {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
}

.verification-band p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 13px;
}

.completion-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 32px;
  padding: clamp(28px, 5vw, 46px);
  border: 1px solid var(--color-device-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-device);
}

.completion-panel h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 42px);
}

.completion-panel p {
  max-width: 680px;
  margin-bottom: 0;
}

.completion-label {
  display: block;
  margin-bottom: 10px;
  color: var(--color-scene-light);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.completion-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.completion-secondary {
  border-color: var(--color-device-line);
  background: var(--color-device-deep);
  color: var(--color-device-text);
}

.completion-secondary:hover {
  border-color: var(--color-accent-line);
  background: var(--color-device-mid);
}

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

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

  .setup-map {
    width: 100%;
    max-width: 620px;
  }

  .setup-map-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
  }

  .setup-map-list::before {
    top: 11px;
    right: 8%;
    bottom: auto;
    left: 8%;
    width: auto;
    height: 1px;
  }

  .setup-map-list li {
    grid-template-columns: 1fr;
    justify-items: center;
    min-height: 0;
    text-align: center;
  }

  .step-layout {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 28px;
  }

  .verification-band {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .tutorial-hero {
    padding-top: 64px;
    padding-bottom: 68px;
  }

  .tutorial-hero::before {
    inset: 48% 0 0;
  }

  .setup-map::after {
    display: none;
  }

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

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

  .completion-actions {
    align-items: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
  }
}

@media (max-width: 620px) {
  .tutorial-actions {
    width: 100%;
  }

  .tutorial-actions .button {
    flex: 1;
    min-width: 0;
  }

  .setup-map {
    padding: 20px;
  }

  .setup-map-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .setup-map-list {
    grid-template-columns: 1fr;
  }

  .setup-map-list::before {
    top: 12px;
    right: auto;
    bottom: 12px;
    left: 6px;
    width: 1px;
    height: auto;
  }

  .setup-map-list li {
    grid-template-columns: 14px 1fr;
    justify-items: stretch;
    min-height: 56px;
    text-align: left;
  }

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

  .step-rail {
    min-height: 0;
    flex-direction: row;
    align-items: center;
    padding-top: 0;
  }

  .step-code {
    writing-mode: horizontal-tb;
  }

  .step-line {
    width: auto;
    height: 1px;
    min-height: 1px;
    flex: 1;
    background: linear-gradient(90deg, var(--color-accent), var(--color-border));
  }

  .tutorial-step-dark .step-line {
    background: linear-gradient(90deg, var(--color-accent), var(--color-device-line));
  }

  .step-content > p {
    font-size: 16px;
  }

  .step-action-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .platform-instruction {
    padding: 22px 18px;
  }

  .completion-actions {
    width: 100%;
    align-items: stretch;
    flex-direction: column;
  }

  .completion-actions .button {
    width: 100%;
  }
}