.tutorial-hero {
  position: relative;
  background:
    radial-gradient(circle at 14% 20%, var(--color-mint-glow), transparent 34%),
    radial-gradient(circle at 88% 16%, var(--color-sky-glow), transparent 36%),
    linear-gradient(135deg, var(--color-bg), var(--color-panel-soft));
}

.tutorial-hero::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, transparent, var(--color-text), transparent);
  opacity: .32;
}

.tutorial-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, .92fr);
  align-items: center;
  gap: clamp(44px, 7vw, 88px);
}

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

.tutorial-hero-copy h1 {
  max-width: 760px;
  margin-top: 22px;
}

.tutorial-lead {
  max-width: 720px;
  margin-top: 24px;
  margin-bottom: 22px;
  font-size: 17px;
}

.platform-links {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.platform-links a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 6px 13px;
  color: var(--color-muted);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-soft);
  font-size: 13px;
  font-weight: 700;
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.platform-links a:hover {
  color: var(--color-accent-dark);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.guide-map {
  position: relative;
  padding: clamp(24px, 4vw, 34px);
  overflow: hidden;
}

.guide-map::before {
  position: absolute;
  top: -74px;
  right: -54px;
  width: 180px;
  height: 180px;
  content: "";
  background: var(--color-accent-soft);
  border-radius: 50%;
}

.guide-map-head {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
}

.guide-map-head span {
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.guide-map-head strong {
  font-family: var(--font-mono);
  font-size: 13px;
}

.guide-map-list {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.guide-map-list li {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  min-height: 74px;
}

.guide-map-list li:not(:last-child)::after {
  position: absolute;
  top: 53px;
  bottom: -21px;
  left: 22px;
  width: 1px;
  content: "";
  background: var(--color-border);
}

.guide-map-number {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
}

.guide-map-list strong,
.guide-map-list small {
  display: block;
}

.guide-map-list small {
  margin-top: 2px;
  color: var(--color-muted);
  font-size: 12px;
}

.tutorial-intro .callout {
  margin-top: 0;
  margin-bottom: 34px;
}

.tutorial-intro .toc-tabs {
  top: 10px;
}

.prep-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.prep-card {
  min-width: 0;
  padding: 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.prep-card h3 {
  margin-top: 18px;
  font-size: 20px;
}

.prep-card p {
  margin-bottom: 0;
}

.prep-index {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
}

.intro-note {
  max-width: 900px;
  margin: 28px 0 0;
}

.intro-note a,
.step-body a,
.after-grid a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.tutorial-step {
  scroll-margin-top: calc(var(--header-height) + 18px);
}

.step-layout {
  display: grid;
  grid-template-columns: minmax(220px, .72fr) minmax(0, 1.58fr);
  align-items: start;
  gap: clamp(34px, 7vw, 88px);
}

.step-layout--reverse {
  grid-template-columns: minmax(0, 1.58fr) minmax(220px, .72fr);
}

.step-layout--reverse .step-side {
  grid-column: 2;
  grid-row: 1;
}

.step-layout--reverse .step-body {
  grid-column: 1;
  grid-row: 1;
}

.step-side {
  position: sticky;
  top: 28px;
  min-width: 0;
}

.step-side h2 {
  margin-top: 17px;
}

.step-side p {
  margin-bottom: 0;
  font-size: 16px;
}

.step-label {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 12px;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
}

.step-body {
  min-width: 0;
  padding: clamp(24px, 5vw, 44px);
}

.step-body h3 {
  margin-top: 34px;
}

.step-body h3:first-child {
  margin-top: 0;
}

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

.step-body > p:last-of-type {
  margin-bottom: 0;
}

.step-next {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--color-border);
}

.step-next span {
  color: var(--color-muted);
  font-size: 13px;
}

.step-next a {
  color: var(--color-accent-dark);
  font-weight: 800;
  text-decoration: none;
}

.step-next--complete {
  padding: 20px;
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
}

.mode-list {
  display: grid;
  gap: 12px;
  margin-block: 26px 34px;
}

.mode-row {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  align-items: start;
  gap: 8px 12px;
  padding: 18px;
  background: var(--color-panel-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.mode-row > strong {
  min-width: max-content;
}

.mode-row p {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14px;
}

.mode-row--recommended {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
}

.verification-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-block: 28px 34px;
}

.verification-grid > div {
  min-width: 0;
  padding: 18px;
  background: var(--color-panel-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.verify-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  margin-bottom: 13px;
  color: var(--color-on-accent);
  background: var(--color-success);
  border-radius: 50%;
  font-weight: 800;
}

.verification-grid strong {
  display: block;
  font-size: 14px;
}

.verification-grid p {
  margin: 7px 0 0;
  font-size: 13px;
}

.after-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.after-grid .card {
  min-width: 0;
}

.after-grid h3 {
  font-size: 20px;
}

.after-grid p {
  margin-bottom: 0;
}

.completion-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  margin-top: 34px;
  padding: clamp(24px, 4vw, 34px);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
}

.completion-panel h3 {
  max-width: 720px;
  margin-top: 17px;
}

.completion-panel p {
  margin-bottom: 0;
}

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

  .guide-map {
    max-width: 660px;
  }

  .step-layout,
  .step-layout--reverse {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .step-layout--reverse .step-side,
  .step-layout--reverse .step-body {
    grid-column: 1;
  }

  .step-layout--reverse .step-side {
    grid-row: 1;
  }

  .step-layout--reverse .step-body {
    grid-row: 2;
  }

  .step-side {
    position: static;
    max-width: 720px;
  }

  .prep-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 680px) {
  .tutorial-hero-grid {
    gap: 34px;
  }

  .guide-map {
    padding: 22px;
  }

  .guide-map-list li {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .guide-map-number {
    width: 42px;
    height: 42px;
  }

  .guide-map-list li:not(:last-child)::after {
    left: 20px;
  }

  .step-body {
    padding: 22px;
  }

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

  .mode-row > strong {
    min-width: 0;
  }

  .mode-row p {
    grid-column: 1;
  }

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

  .completion-panel .button-row {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .platform-links a {
    flex: 1 1 92px;
    justify-content: center;
  }

  .guide-map-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

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