.tutorial-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(72px, 9vw, 116px);
  padding-bottom: clamp(66px, 8vw, 104px);
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(circle at 82% 18%, var(--color-accent-soft), var(--white-zero) 34%),
    radial-gradient(circle at 12% 88%, var(--color-panel-alt), var(--white-zero) 38%),
    var(--color-bg);
}

.tutorial-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.34;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, transparent, var(--color-text), transparent);
}

.tutorial-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  gap: clamp(34px, 6vw, 76px);
  align-items: center;
}

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

.tutorial-hero-copy h1 {
  max-width: 720px;
  margin-top: 20px;
}

.tutorial-lede {
  max-width: 680px;
  margin-bottom: 27px;
  color: var(--color-text-muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.75;
}

.tutorial-route-card {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.tutorial-route-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 17px;
  border-bottom: 1px dashed var(--color-border-strong);
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 700;
}

.tutorial-route-head strong {
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.tutorial-route {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 8px 0 0;
  list-style: none;
}

.tutorial-route li {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-width: 0;
  padding: 13px 0;
  margin: 0;
}

.tutorial-route li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 49px;
  bottom: -7px;
  left: 21px;
  border-left: 1px dashed var(--color-warning);
}

.tutorial-route-number {
  position: relative;
  z-index: 1;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-panel);
  color: var(--color-accent-dark);
  font: 700 12px/1 var(--font-mono);
}

.tutorial-route li:first-child .tutorial-route-number {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-white);
}

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

.tutorial-route li strong {
  color: var(--color-text);
  font-family: var(--font-display);
}

.tutorial-route li div > span {
  margin-top: 2px;
  color: var(--color-text-muted);
  font-size: 13px;
}

.tutorial-prose > h2 {
  margin-top: 18px;
}

.tutorial-prose > h3 {
  margin-top: 34px;
}

.tutorial-prose p {
  line-height: 1.9;
}

.tutorial-platform-links {
  display: flex;
  max-width: 100%;
  flex-wrap: wrap;
  gap: 9px;
  margin: 25px 0;
}

.tutorial-platform-links a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text);
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow-soft);
}

.tutorial-platform-links a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

.tutorial-check-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 34px;
}

.tutorial-check-grid .card {
  box-shadow: none;
}

.tutorial-check-grid h3 {
  margin-top: 0;
}

.tutorial-check-grid ul {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.tutorial-steps {
  counter-reset: tutorial-step;
}

.tutorial-step {
  position: relative;
}

.tutorial-step-alt {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel-alt);
}

.tutorial-step .reading-wrap {
  position: relative;
}

.tutorial-step-label {
  position: absolute;
  top: 0;
  left: calc(var(--gutter) * -1);
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-panel);
  color: var(--color-accent-dark);
  box-shadow: var(--shadow-soft);
  font: 800 14px/1 var(--font-mono);
}

.mode-comparison {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 32px 0;
}

.mode-comparison article {
  min-width: 0;
  padding: 19px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
}

.mode-comparison h3 {
  margin-top: 13px;
  margin-bottom: 8px;
  font-size: 19px;
}

.mode-comparison p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.mode-dot {
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.mode-dot-accent {
  background: var(--color-accent);
}

.mode-dot-warning {
  background: var(--color-warning);
}

.mode-dot-muted {
  background: var(--color-border-strong);
}

.verification-board {
  margin: 32px 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.verification-board h3 {
  margin-top: 0;
}

.verification-board ol {
  margin-bottom: 0;
}

.verification-board li::marker {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-weight: 800;
}

.tutorial-fixes {
  padding: clamp(24px, 5vw, 52px);
}

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

.fix-list article {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 15px;
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
}

.fix-list article > span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font: 800 12px/1 var(--font-mono);
}

.fix-list h3 {
  margin-bottom: 7px;
  font-size: 19px;
}

.fix-list p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.tutorial-next {
  margin-top: 28px;
  margin-bottom: 0;
  background: var(--color-panel);
}

@media (max-width: 980px) {
  .tutorial-hero-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .tutorial-route-card {
    max-width: 620px;
  }

  .tutorial-step-label {
    position: static;
    margin-bottom: 18px;
  }
}

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

  .tutorial-check-grid,
  .mode-comparison,
  .fix-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .tutorial-route-card {
    padding: 20px;
  }

  .tutorial-step-label {
    width: 50px;
    height: 50px;
  }
}

@media (max-width: 420px) {
  .tutorial-platform-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tutorial-platform-links a:last-child {
    grid-column: 1 / -1;
  }

  .fix-list article {
    grid-template-columns: 36px minmax(0, 1fr);
    padding: 17px;
  }

  .fix-list article > span {
    width: 36px;
    height: 36px;
  }
}