.tutorial-hero {
  padding-top: clamp(var(--space-8), 8vw, var(--section-space));
  border-bottom: 1px solid var(--color-border);
}

.tutorial-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  align-items: start;
  gap: var(--space-8);
}

.tutorial-lead {
  max-width: 760px;
  margin-bottom: var(--space-6);
  color: var(--color-text-muted);
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.75;
}

.tutorial-sequence {
  border: 1px solid var(--color-border-strong);
  background: var(--color-panel);
}

.tutorial-sequence > .mono-note {
  margin: 0;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.tutorial-sequence ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.tutorial-sequence li {
  display: grid;
  min-height: 66px;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: center;
  margin: 0;
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.tutorial-sequence li:last-child {
  border-bottom: 0;
}

.tutorial-sequence li span {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.tutorial-sequence li strong {
  font-weight: 500;
}

.tutorial-platform-note {
  margin-top: var(--space-8);
  margin-bottom: var(--space-6);
}

.tutorial-platform-note p {
  margin-bottom: 0;
}

.tutorial-toc {
  top: calc(var(--header-height) + var(--space-2));
}

#prepare,
#import,
#mode,
#connect,
#verify,
#daily-use {
  scroll-margin-top: calc(var(--header-height) + 72px);
}

.tutorial-intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: var(--space-8);
  align-items: start;
}

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

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

.tutorial-check {
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-border-strong);
}

.tutorial-check .mono-note,
.tutorial-check strong {
  display: block;
}

.tutorial-check strong {
  margin-top: var(--space-2);
  margin-bottom: var(--space-2);
}

.tutorial-check p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

.tutorial-step-layout {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  gap: clamp(var(--space-6), 6vw, var(--space-8));
  align-items: start;
}

.tutorial-step-rail {
  position: sticky;
  top: calc(var(--header-height) + var(--space-6));
  display: flex;
  flex-direction: column;
  padding-top: var(--space-2);
  border-top: 3px solid var(--color-accent);
}

.tutorial-step-number {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 46px;
  font-weight: 400;
  line-height: 1;
}

.tutorial-step-label {
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.09em;
  overflow-wrap: anywhere;
}

.tutorial-step-body {
  max-width: 880px;
}

.tutorial-step-body > h2 {
  margin-bottom: var(--space-6);
}

.tutorial-step-body h3 {
  margin-top: var(--space-8);
}

.action-path {
  display: flex;
  max-width: 100%;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin: var(--space-6) 0;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
}

.action-path span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.sequence-bridge {
  margin-top: var(--space-7);
  margin-bottom: 0;
  padding: var(--space-5);
  border-left: 3px solid var(--color-accent);
  background: var(--color-panel);
  color: var(--color-text);
}

.mode-principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
  margin: var(--space-7) 0;
}

.mode-principles .panel h3 {
  margin-top: var(--space-3);
  margin-bottom: var(--space-3);
}

.mode-principles .panel p:last-child {
  margin-bottom: 0;
}

.connection-signals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: var(--space-7) 0;
  border-top: 1px solid var(--color-border-strong);
  border-left: 1px solid var(--color-border-strong);
}

.connection-signals > div {
  padding: var(--space-5);
  border-right: 1px solid var(--color-border-strong);
  border-bottom: 1px solid var(--color-border-strong);
  background: var(--color-bg);
}

.connection-signals .status-dot {
  margin-bottom: var(--space-4);
}

.connection-signals strong {
  display: block;
  margin-bottom: var(--space-2);
}

.connection-signals p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

.verification-table {
  margin: var(--space-7) 0;
}

.verification-table table {
  min-width: 700px;
}

.tutorial-daily-grid .panel h3 {
  margin-bottom: var(--space-3);
}

.tutorial-daily-grid .panel p {
  margin-bottom: 0;
}

.tutorial-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-7);
  margin-top: var(--space-8);
  padding-top: var(--space-7);
  border-top: 1px solid var(--color-border-strong);
}

.tutorial-next h2 {
  margin-bottom: var(--space-3);
}

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

@media (max-width: 900px) {
  .tutorial-hero-grid,
  .tutorial-intro-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .tutorial-sequence {
    max-width: 620px;
  }

  .tutorial-step-layout {
    grid-template-columns: 88px minmax(0, 1fr);
  }

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

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

@media (max-width: 640px) {
  .tutorial-hero-grid {
    gap: var(--space-7);
  }

  .tutorial-platform-note {
    margin-top: var(--space-7);
  }

  .tutorial-step-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-5);
  }

  .tutorial-step-rail {
    position: static;
    flex-direction: row;
    align-items: baseline;
    gap: var(--space-3);
    padding-top: var(--space-3);
  }

  .tutorial-step-number {
    font-size: 34px;
  }

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

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

  .action-path span[aria-hidden="true"] {
    transform: rotate(90deg);
  }

  .verification-table table {
    min-width: 620px;
  }
}