.tutorial-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.tutorial-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, .9fr);
  align-items: center;
  gap: clamp(42px, 7vw, 96px);
}

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

.tutorial-hero-copy h1 {
  margin-top: 20px;
}

.tutorial-hero-copy .button-row {
  margin-top: 30px;
}

.tutorial-route {
  position: relative;
  display: grid;
  gap: 18px;
  padding: 34px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-bg);
}

.tutorial-route::before {
  position: absolute;
  top: 58px;
  bottom: 58px;
  left: 55px;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.route-station {
  position: relative;
  display: flex;
  min-height: 58px;
  align-items: center;
  padding: 12px 18px 12px 58px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.route-station::before {
  position: absolute;
  z-index: 1;
  left: 13px;
  width: 16px;
  height: 16px;
  border: 4px solid var(--color-bg);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.route-station.is-active {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

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

.tutorial-flow > .callout {
  margin-top: clamp(48px, 7vw, 88px);
}

.tutorial-flow a:not(.btn):not(.toc-tabs a) {
  color: var(--color-accent-dark);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--color-accent-line);
  text-underline-offset: 4px;
}

.tutorial-step {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: clamp(28px, 5vw, 74px);
  border-top: 1px solid var(--color-border);
}

.step-label {
  position: sticky;
  top: var(--toc-offset);
  align-self: start;
  width: 82px;
  margin-top: 5px;
  padding: 9px 12px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
  text-align: center;
}

.step-content {
  max-width: 880px;
}

.step-content > p {
  margin-bottom: 20px;
}

.step-content h2 {
  max-width: 760px;
}

.step-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 30px;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.step-actions > span {
  color: var(--color-muted);
  font-size: 14px;
}

.text-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
}

.sample-url {
  margin-block: 24px;
}

.platform-manual {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.platform-instruction {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
}

.platform-instruction:nth-child(even) {
  background: var(--color-panel);
}

.platform-instruction h3 {
  margin-top: 18px;
  font-size: clamp(21px, 2vw, 26px);
}

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

.platform-name {
  display: inline-flex;
  min-height: 29px;
  align-items: center;
  padding: 5px 12px;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
}

.verification-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.verification-list li {
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  color: var(--color-muted);
}

.verification-list strong {
  display: block;
  margin-bottom: 5px;
  color: var(--color-text);
}

.completion-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
  margin-top: 34px;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-panel);
  background: var(--color-accent-soft);
}

.completion-panel h3 {
  margin-top: 18px;
  font-size: clamp(23px, 3vw, 32px);
}

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

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

  .tutorial-route {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 8px;
    padding: 18px;
  }

  .tutorial-route::before {
    top: 45px;
    right: 42px;
    bottom: auto;
    left: 42px;
    width: auto;
    height: 4px;
  }

  .route-station {
    min-height: 78px;
    justify-content: center;
    padding: 34px 8px 8px;
    text-align: center;
  }

  .route-station::before {
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
  }

  .tutorial-step {
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 24px;
  }

  .step-label {
    width: 72px;
  }
}

@media (max-width: 768px) {
  .tutorial-hero-grid {
    gap: 38px;
  }

  .tutorial-route {
    grid-template-columns: 1fr;
  }

  .tutorial-route::before {
    top: 40px;
    right: auto;
    bottom: 40px;
    left: 38px;
    width: 4px;
    height: auto;
  }

  .route-station {
    min-height: 52px;
    justify-content: flex-start;
    padding: 10px 12px 10px 48px;
    text-align: left;
  }

  .route-station::before {
    top: 50%;
    left: 11px;
    transform: translateY(-50%);
  }

  .tutorial-step {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .step-label {
    position: static;
    width: auto;
    justify-self: start;
  }

  .platform-manual,
  .verification-list {
    grid-template-columns: 1fr;
  }

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

  .completion-panel .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .tutorial-route {
    padding: 14px;
  }

  .tutorial-route::before {
    left: 34px;
  }

  .step-actions {
    align-items: stretch;
  }

  .step-actions .btn,
  .step-actions .text-link {
    width: 100%;
    justify-content: center;
  }

  .platform-instruction {
    padding: 20px;
  }
}