.tutorial-mast {
  position: relative;
  margin: 16px 16px 0;
  overflow: hidden;
  border-radius: var(--radius-l);
  background: var(--color-accent);
  color: var(--color-on-accent);
}

.tutorial-mast::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-on-accent-hair) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-on-accent-hair) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .24;
  content: "";
  pointer-events: none;
}

.tutorial-mast .wrap {
  position: relative;
  z-index: 1;
}

.tutorial-mast-grid {
  display: grid;
  min-height: 560px;
  padding-top: clamp(72px, 9vw, 116px);
  padding-bottom: clamp(72px, 9vw, 116px);
  align-items: center;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  gap: clamp(44px, 8vw, 110px);
}

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

.tutorial-mast .eyebrow,
.tutorial-mast h1 {
  color: var(--color-on-accent);
}

.tutorial-mast .lead {
  color: var(--color-on-accent-soft);
}

.tutorial-mast .btn--primary {
  border-color: var(--color-on-accent);
  background: var(--color-on-accent);
  color: var(--color-accent);
}

.tutorial-mast .btn--primary:hover {
  border-color: var(--color-on-accent);
  background: var(--color-on-accent-strong);
  color: var(--color-accent-dark);
}

.tutorial-mast .btn--outline {
  border-color: var(--color-on-accent-line);
  background: transparent;
  color: var(--color-on-accent);
}

.tutorial-mast .btn--outline:hover {
  border-color: var(--color-on-accent);
  background: var(--color-on-accent-tint);
}

.tutorial-route {
  padding: 26px;
  border: 1px solid var(--color-on-accent-line);
  border-radius: var(--radius-m);
  background: var(--color-on-accent-tint);
}

.tutorial-route-title {
  margin-bottom: 24px;
  color: var(--color-on-accent-soft);
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
}

.tutorial-route ol {
  list-style: none;
}

.tutorial-route li {
  position: relative;
  display: flex;
  min-height: 72px;
  align-items: flex-start;
  gap: 16px;
}

.tutorial-route li:not(:last-child)::after {
  position: absolute;
  top: 22px;
  bottom: -6px;
  left: 7px;
  width: 1px;
  background: var(--color-on-accent-line);
  content: "";
}

.tutorial-route-node {
  position: relative;
  z-index: 1;
  width: 15px;
  height: 15px;
  margin-top: 4px;
  flex-shrink: 0;
  border: 2px solid var(--color-on-accent);
  border-radius: 50%;
  background: var(--color-accent);
}

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

.tutorial-route strong {
  color: var(--color-on-accent);
  font-family: var(--font-mono);
  font-size: .85rem;
}

.tutorial-route div span {
  margin-top: 3px;
  color: var(--color-on-accent-soft);
  font-size: .9rem;
}

.tutorial-body {
  padding-top: 56px;
}

.tutorial-body .toc {
  margin-bottom: 72px;
}

.tutorial-section {
  display: grid;
  padding-top: 24px;
  padding-bottom: clamp(76px, 10vw, 128px);
  grid-template-columns: 118px minmax(0, 820px);
  justify-content: center;
  gap: clamp(28px, 5vw, 72px);
  scroll-margin-top: 24px;
}

.tutorial-section--last {
  padding-bottom: 0;
}

.tutorial-step-mark {
  position: relative;
  padding-top: 9px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: .73rem;
  font-weight: 700;
  letter-spacing: .08em;
}

.tutorial-step-mark::before {
  display: block;
  width: 100%;
  height: 1px;
  margin-bottom: 12px;
  background: var(--color-accent);
  content: "";
}

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

.tutorial-copy > p {
  color: var(--color-muted);
}

.tutorial-copy > p + p {
  margin-top: 20px;
}

.tutorial-copy .eyebrow {
  color: var(--color-accent);
}

.text-link {
  color: var(--color-accent);
  font-weight: 650;
  text-decoration: underline;
  text-decoration-color: var(--color-accent-line);
  text-underline-offset: 3px;
}

.text-link:hover {
  color: var(--color-accent-dark);
  text-decoration-color: var(--color-accent);
}

.tutorial-checklist {
  margin-top: 34px;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
}

.tutorial-checklist h3 {
  font-size: 1.15rem;
}

.tutorial-checklist ul {
  display: grid;
  padding-left: 22px;
  gap: 9px;
  color: var(--color-muted);
}

.tutorial-result {
  margin-top: 34px;
  padding: 24px;
  border-top: 1px solid var(--color-accent);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.tutorial-result svg {
  width: min(480px, 100%);
  margin-bottom: 18px;
  color: var(--color-accent);
}

.tutorial-result p {
  color: var(--color-muted);
}

.tutorial-result strong {
  color: var(--color-text);
}

.tutorial-svg-line {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.tutorial-svg-node {
  fill: var(--color-bg);
  stroke: currentColor;
  stroke-width: 2;
}

.tutorial-svg-node-active {
  fill: var(--color-accent-wash);
  stroke-width: 4;
}

.tutorial-svg-label {
  fill: currentColor;
  font-family: var(--font-mono);
  font-size: 10px;
  text-anchor: middle;
}

.mode-grid {
  display: grid;
  margin-top: 34px;
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mode-grid article {
  padding: 26px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.mode-grid .mono {
  margin-bottom: 10px;
  color: var(--color-accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
}

.mode-grid h3 {
  font-size: 1.2rem;
}

.mode-grid article > p:last-child {
  color: var(--color-muted);
}

.connection-strip {
  display: grid;
  margin-top: 34px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.connection-strip > div {
  display: grid;
  min-width: 0;
  padding: 22px;
  align-items: center;
  grid-template-columns: auto 1fr;
  gap: 3px 10px;
}

.connection-strip > div:not(:last-child) {
  border-right: 1px solid var(--color-border);
}

.connection-strip .status-dot {
  width: 10px;
  height: 10px;
  grid-row: 1 / 3;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  background: var(--color-accent-wash);
}

.connection-strip strong {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: .78rem;
}

.connection-strip small {
  color: var(--color-muted);
}

.verify-matrix {
  margin-top: 34px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
}

.verify-matrix > div {
  display: grid;
  grid-template-columns: .8fr 1fr 1.4fr;
}

.verify-matrix > div:not(:last-child) {
  border-bottom: 1px solid var(--color-border);
}

.verify-matrix span {
  min-width: 0;
  padding: 13px 16px;
  color: var(--color-muted);
}

.verify-matrix span:not(:last-child) {
  border-right: 1px solid var(--color-border);
}

.verify-matrix-head {
  background: var(--color-panel);
  font-weight: 700;
}

.verify-matrix-head span {
  color: var(--color-text);
}

.next-links {
  display: grid;
  margin-top: 36px;
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.next-links a {
  display: grid;
  min-width: 0;
  padding: 24px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  grid-template-columns: 110px 1fr;
  gap: 4px 18px;
  transition: background var(--transition-fast);
}

.next-links a:hover {
  background: var(--color-panel);
}

.next-links .mono {
  color: var(--color-accent);
  font-size: .75rem;
  font-weight: 700;
  grid-row: 1 / 3;
}

.next-links strong {
  color: var(--color-text);
}

.next-links small {
  color: var(--color-muted);
}

@media (max-width: 900px) {
  .tutorial-mast-grid {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .tutorial-route {
    max-width: 560px;
  }

  .tutorial-section {
    grid-template-columns: 90px minmax(0, 1fr);
    gap: 28px;
  }
}

@media (max-width: 700px) {
  .tutorial-mast {
    margin: 8px 8px 0;
    border-radius: var(--radius-m);
  }

  .tutorial-mast-grid {
    padding-top: 64px;
    padding-bottom: 64px;
    gap: 38px;
  }

  .tutorial-body {
    padding-top: 40px;
  }

  .tutorial-body .toc {
    margin-bottom: 52px;
  }

  .tutorial-section {
    padding-top: 16px;
    padding-bottom: 80px;
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .tutorial-step-mark {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .tutorial-step-mark::before {
    width: 42px;
    margin-bottom: 0;
  }

  .mode-grid {
    grid-template-columns: 1fr;
  }

  .connection-strip {
    grid-template-columns: 1fr;
  }

  .connection-strip > div:not(:last-child) {
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .verify-matrix {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .verify-matrix > div {
    min-width: 620px;
  }

  .next-links a {
    grid-template-columns: 1fr;
  }

  .next-links .mono {
    grid-row: auto;
  }
}

@media (max-width: 420px) {
  .tutorial-route,
  .tutorial-checklist,
  .tutorial-result {
    padding: 20px;
  }

  .tutorial-route li {
    min-height: 68px;
  }
}