:root {
  --tutorial-route-width: 430px;
  --tutorial-step-size: 54px;
  --tutorial-line-width: 2px;
}

.tutorial-hero {
  position: relative;
  overflow-x: clip;
  padding-top: 88px;
  padding-bottom: 88px;
  background: var(--color-page);
}

.tutorial-hero::before {
  position: absolute;
  top: 28px;
  right: 4%;
  width: 44%;
  height: 82%;
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-line-focus) 0,
    var(--color-line-focus) 1px,
    transparent 1px,
    transparent 10px
  );
  content: "";
  opacity: 0.62;
  -webkit-mask-image: radial-gradient(closest-side at 62% 42%, var(--color-ink) 12%, transparent 100%);
  mask-image: radial-gradient(closest-side at 62% 42%, var(--color-ink) 12%, transparent 100%);
  pointer-events: none;
}

.tutorial-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(340px, 0.88fr);
  align-items: center;
  gap: 80px;
}

.tutorial-intro {
  max-width: 680px;
}

.tutorial-intro h1 {
  max-width: 680px;
  font-size: clamp(36px, 4vw, 48px);
  line-height: 1.13;
}

.tutorial-lead {
  max-width: 650px;
  margin-bottom: 30px;
  color: var(--color-ink-muted);
  font-size: 18px;
  line-height: 1.85;
}

.tutorial-route {
  width: 100%;
  max-width: var(--tutorial-route-width);
  justify-self: end;
  overflow: clip;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  background: var(--color-page);
  box-shadow: var(--shadow-deep);
  transform: rotate(0.7deg);
}

.route-head,
.route-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 22px;
  background: var(--color-panel);
  color: var(--color-ink-muted);
  font-size: 12px;
}

.route-head {
  border-bottom: 1px solid var(--color-line);
}

.route-label,
.route-time {
  font-family: var(--font-mono);
}

.route-label {
  color: var(--color-brand-deep);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.route-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 10px 24px;
  list-style: none;
}

.route-list li {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  min-height: 82px;
}

.route-list li:not(:last-child)::after {
  position: absolute;
  bottom: -8px;
  left: 23px;
  width: var(--tutorial-line-width);
  height: 24px;
  background: var(--gradient-brand);
  content: "";
  opacity: 0.45;
}

.route-number {
  display: inline-flex;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line-focus);
  border-radius: var(--radius-control);
  background: var(--gradient-brand);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  box-shadow: var(--shadow-button);
}

.route-list strong,
.route-list span {
  display: block;
}

.route-list strong {
  margin-bottom: 2px;
  font-size: 16px;
}

.route-list li div span {
  color: var(--color-ink-muted);
  font-size: 13px;
}

.route-status {
  justify-content: flex-start;
  border-top: 1px solid var(--color-line);
  font-family: var(--font-mono);
}

.route-status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-success);
}

.tutorial-notice {
  padding-top: 40px;
  padding-bottom: 40px;
}

.tutorial-notice .callout {
  margin: 0;
}

.tutorial-document {
  padding-top: 56px;
  padding-bottom: var(--section-space);
}

.tutorial-document .jump-nav {
  margin-bottom: 76px;
}

.tutorial-section {
  width: 100%;
  max-width: var(--reading-width);
  margin-right: auto;
  margin-left: auto;
  padding-top: 20px;
  scroll-margin-top: 86px;
}

.tutorial-section + .tutorial-section {
  margin-top: 78px;
  padding-top: 78px;
  border-top: 1px solid var(--color-line);
}

.step-heading {
  display: grid;
  grid-template-columns: var(--tutorial-step-size) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  margin-bottom: 34px;
}

.step-heading .eyebrow {
  margin-bottom: 7px;
}

.step-heading h2 {
  margin-bottom: 0;
}

.step-index {
  display: inline-flex;
  width: var(--tutorial-step-size);
  height: var(--tutorial-step-size);
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line-focus);
  border-radius: var(--radius-control);
  background: var(--gradient-brand);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 750;
  box-shadow: var(--shadow-button);
}

.tutorial-prose {
  color: var(--color-ink-muted);
  font-size: 16px;
  line-height: 1.9;
}

.tutorial-prose h3 {
  margin-top: 38px;
  margin-bottom: 14px;
  color: var(--color-ink);
  font-size: 21px;
}

.tutorial-prose p {
  margin-bottom: 1.35em;
}

.result-box {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 15px;
  margin: 28px 0;
  padding: 22px;
  border: 1px solid var(--color-success);
  border-radius: var(--radius-card);
  background: var(--color-success-bg);
  color: var(--color-ink);
}

.result-mark {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-success);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-weight: 750;
}

.result-box strong {
  display: block;
  margin-bottom: 3px;
}

.result-box p {
  margin-bottom: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 28px 0;
}

.check-grid .surface-card {
  padding: 22px;
  box-shadow: 0 2px 6px var(--color-shadow-faint);
}

.check-grid h3 {
  margin-top: 0;
  margin-bottom: 7px;
  font-size: 17px;
}

.check-grid p {
  margin-bottom: 0;
  font-size: 14px;
  line-height: 1.75;
}

.completion-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 32px;
  margin-top: 42px;
  padding: 32px;
  border: 1px solid var(--color-line-focus);
  border-radius: var(--radius-panel);
  background: var(--color-panel);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.completion-panel h2 {
  margin-bottom: 18px;
  font-size: 28px;
}

.completion-panel ul {
  margin-bottom: 0;
  color: var(--color-ink-muted);
}

.completion-panel .button-row {
  min-width: 220px;
  align-items: stretch;
  flex-direction: column;
}

@media (max-width: 960px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
    gap: 52px;
  }

  .tutorial-route {
    max-width: 680px;
    justify-self: start;
    transform: none;
  }

  .tutorial-hero::before {
    top: 38%;
    right: -10%;
    width: 78%;
    height: 58%;
  }
}

@media (max-width: 768px) {
  .tutorial-hero {
    padding-top: 62px;
    padding-bottom: 64px;
  }

  .tutorial-intro h1 {
    font-size: clamp(26px, 7.5vw, 30px);
  }

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

  .tutorial-document .jump-nav {
    margin-bottom: 56px;
  }

  .tutorial-section + .tutorial-section {
    margin-top: 58px;
    padding-top: 58px;
  }

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

  .completion-panel {
    align-items: stretch;
  }

  .completion-panel .button-row {
    min-width: 0;
  }
}

@media (max-width: 640px) {
  :root {
    --tutorial-step-size: 46px;
  }

  .tutorial-hero-grid {
    gap: 38px;
  }

  .tutorial-route {
    border-radius: var(--radius-card);
  }

  .route-list {
    padding-right: 16px;
    padding-left: 16px;
  }

  .route-list li {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
  }

  .route-number {
    width: 42px;
    height: 42px;
  }

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

  .tutorial-document {
    padding-top: 42px;
  }

  .step-heading {
    gap: 14px;
    margin-bottom: 26px;
  }

  .step-index {
    font-size: 11px;
  }

  .tutorial-prose {
    font-size: 15px;
  }

  .result-box {
    grid-template-columns: 32px minmax(0, 1fr);
    padding: 18px;
  }

  .result-mark {
    width: 32px;
    height: 32px;
  }

  .completion-panel {
    padding: 22px;
  }

  .completion-panel h2 {
    font-size: 24px;
  }
}