.tutorial-hero {
  position: relative;
  padding-top: clamp(58px, 8vw, 104px);
  padding-bottom: clamp(64px, 9vw, 112px);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.tutorial-hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(720px 460px at 88% 16%, var(--color-sky-glow), transparent 66%),
    radial-gradient(680px 440px at 18% 0%, var(--color-mint-glow), transparent 68%);
  opacity: 0.72;
  pointer-events: none;
}

.tutorial-hero-layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.98fr) minmax(420px, 0.82fr);
  align-items: center;
  gap: clamp(42px, 7vw, 88px);
}

.tutorial-hero-copy {
  max-width: 660px;
}

.tutorial-lead {
  max-width: 39em;
  margin-bottom: 28px;
  color: var(--color-ink-muted);
  font-size: 18px;
  line-height: 1.8;
}

.tutorial-lead strong {
  color: var(--color-ink);
}

.tutorial-hero-copy .button-row {
  margin-bottom: 25px;
}

.tutorial-map {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-window);
  overflow: hidden;
  transform: rotate(1deg);
}

.tutorial-map-head {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-ink);
  font-weight: 750;
}

.tutorial-map-time {
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.tutorial-map-list {
  margin: 0;
  padding: 12px;
  list-style: none;
}

.tutorial-map-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 17px 13px;
  border-radius: var(--radius-md);
}

.tutorial-map-list li + li {
  border-top: 1px solid var(--color-border);
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

.tutorial-map-number {
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 750;
}

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

.tutorial-map-list strong {
  color: var(--color-ink);
  font-size: 15px;
}

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

.tutorial-map-list svg {
  width: 18px;
  color: var(--color-ink-muted);
}

.tutorial-map-done {
  padding: 4px 9px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-success);
  font-size: 12px;
  font-weight: 750;
}

.tutorial-content {
  position: relative;
}

.tutorial-intro,
.tutorial-step {
  max-width: 980px;
  margin-inline: auto;
  scroll-margin-top: 104px;
}

.tutorial-step {
  padding-top: clamp(68px, 9vw, 108px);
  border-top: 1px solid var(--color-border);
}

.tutorial-intro + .tutorial-step {
  margin-top: clamp(68px, 9vw, 108px);
}

.tutorial-step + .tutorial-step {
  margin-top: clamp(68px, 9vw, 108px);
}

.step-heading {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 20px;
  margin-bottom: 30px;
  align-items: start;
}

.step-heading h2 {
  margin-bottom: 9px;
}

.step-heading p {
  max-width: 49em;
  margin: 0;
  color: var(--color-ink-muted);
}

.step-number,
.step-kicker {
  display: inline-flex;
  min-width: 48px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 800;
}

.step-kicker {
  padding-inline: 12px;
  font-family: var(--font-display);
}

.prep-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.prep-item {
  display: flex;
  gap: 13px;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.prep-icon {
  display: flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  flex-shrink: 0;
}

.prep-icon svg {
  width: 19px;
  height: 19px;
}

.prep-item strong {
  display: block;
  margin-bottom: 4px;
}

.prep-item p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
  line-height: 1.6;
}

.step-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.38fr) minmax(280px, 0.72fr);
  align-items: start;
  gap: clamp(28px, 5vw, 54px);
}

.step-layout-reverse {
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.38fr);
}

.step-layout-reverse .step-copy {
  order: 2;
}

.step-layout-reverse .mode-card {
  order: 1;
}

.step-copy h3 {
  margin-top: 30px;
  font-size: 21px;
}

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

.step-copy p,
.tutorial-step > p,
.tutorial-intro > p {
  color: var(--color-ink-muted);
  line-height: 1.85;
}

.interface-card,
.mode-card,
.connection-card {
  position: sticky;
  top: 94px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.interface-card-head {
  display: flex;
  min-height: 54px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 17px;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  font-weight: 750;
}

.interface-status {
  color: var(--color-success);
  font-size: 12px;
}

.interface-field {
  padding: 15px 17px;
  border-bottom: 1px solid var(--color-border);
}

.interface-field span,
.interface-field strong {
  display: block;
}

.interface-field span {
  margin-bottom: 5px;
  color: var(--color-ink-muted);
  font-size: 12px;
}

.interface-field strong {
  font-size: 14px;
}

.interface-field code {
  display: block;
  max-width: 100%;
  color: var(--color-ink-muted);
  font-size: 11px;
  overflow-wrap: anywhere;
}

.interface-action {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 17px;
  background: var(--color-accent-soft);
}

.interface-check {
  display: flex;
  width: 30px;
  height: 30px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-surface);
  font-weight: 800;
  flex-shrink: 0;
}

.interface-action strong,
.interface-action small {
  display: block;
}

.interface-action strong {
  font-size: 13px;
}

.interface-action small {
  margin-top: 2px;
  color: var(--color-ink-muted);
  font-size: 11px;
}

.mode-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 17px;
  border-bottom: 1px solid var(--color-border);
}

.mode-option.is-selected {
  background: var(--color-accent-soft);
}

.mode-radio {
  display: flex;
  width: 18px;
  height: 18px;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  flex-shrink: 0;
}

.mode-option.is-selected .mode-radio {
  border-color: var(--color-accent);
}

.mode-option.is-selected .mode-radio::after {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.mode-option strong,
.mode-option small {
  display: block;
}

.mode-option strong {
  font-size: 13px;
}

.mode-option small {
  margin-top: 2px;
  color: var(--color-ink-muted);
  font-size: 11px;
}

.mode-footer {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  padding: 15px 17px;
  color: var(--color-ink-muted);
  font-size: 12px;
}

.mode-footer strong {
  color: var(--color-success);
}

.connection-node {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-accent-soft);
}

.connection-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-success);
  flex-shrink: 0;
}

.connection-node small,
.connection-node strong {
  display: block;
}

.connection-node small {
  color: var(--color-ink-muted);
  font-size: 11px;
}

.connection-node strong {
  margin-top: 2px;
  font-size: 13px;
}

.connection-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-ink-muted);
  font-size: 12px;
}

.connection-row strong {
  color: var(--color-ink);
  text-align: right;
}

.connection-row .status-success {
  color: var(--color-success);
}

.connection-next {
  padding: 16px 18px;
  color: var(--color-accent-strong);
  font-size: 12px;
  font-weight: 750;
}

.verification-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 17px;
  margin-bottom: 30px;
}

.verification-item {
  padding: 23px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.verification-item > span {
  display: inline-flex;
  width: 32px;
  height: 32px;
  margin-bottom: 16px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
}

.verification-item h3 {
  font-size: 19px;
}

.verification-item p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
  line-height: 1.75;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: check-items;
}

.check-list li {
  position: relative;
  padding: 21px 22px 21px 64px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  counter-increment: check-items;
}

.check-list li::before {
  position: absolute;
  top: 21px;
  left: 21px;
  display: flex;
  width: 27px;
  height: 27px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  content: counter(check-items);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
}

.check-list strong {
  display: block;
  margin-bottom: 5px;
}

.check-list p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
  line-height: 1.75;
}

.next-guide {
  display: flex;
  margin-top: 42px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.next-guide > div {
  max-width: 650px;
}

.next-guide h2 {
  margin-bottom: 8px;
  font-size: clamp(25px, 3vw, 34px);
}

.next-guide p {
  margin: 0;
  color: var(--color-ink-muted);
}

.next-guide .button {
  flex-shrink: 0;
}

@media (max-width: 980px) {
  .tutorial-hero-layout {
    grid-template-columns: 1fr;
  }

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

  .tutorial-map {
    max-width: 680px;
    transform: none;
  }

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

  .step-layout-reverse .step-copy,
  .step-layout-reverse .mode-card {
    order: initial;
  }

  .interface-card,
  .mode-card,
  .connection-card {
    position: static;
    max-width: 520px;
  }

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

@media (max-width: 720px) {
  .tutorial-hero {
    padding-top: 46px;
    padding-bottom: 62px;
  }

  .tutorial-lead {
    font-size: 16px;
  }

  .tutorial-map-list li {
    padding-inline: 9px;
  }

  .step-heading {
    grid-template-columns: 1fr;
    gap: 13px;
  }

  .step-number,
  .step-kicker {
    width: max-content;
    min-height: 40px;
  }

  .tutorial-step {
    padding-top: 64px;
  }

  .tutorial-intro + .tutorial-step,
  .tutorial-step + .tutorial-step {
    margin-top: 64px;
  }

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

@media (max-width: 480px) {
  .tutorial-map-head {
    padding-inline: 16px;
  }

  .tutorial-map-list li {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .tutorial-map-list svg,
  .tutorial-map-done {
    display: none;
  }

  .prep-item {
    padding: 17px;
  }

  .connection-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .connection-row strong {
    text-align: left;
  }

  .verification-item {
    padding: 20px;
  }

  .check-list li {
    padding: 56px 18px 19px;
  }

  .check-list li::before {
    top: 18px;
    left: 18px;
  }
}