.tutorial-mast {
  position: relative;
  padding-top: clamp(62px, 8vw, 104px);
  padding-bottom: clamp(54px, 7vw, 88px);
  overflow-x: clip;
}

.tutorial-mast::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, transparent, currentColor 35%, transparent);
}

.tutorial-mast-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(440px, 1.08fr);
  align-items: center;
  gap: clamp(42px, 7vw, 92px);
}

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

.tutorial-intro h1 {
  margin-bottom: 20px;
}

.tutorial-summary {
  margin-bottom: 25px;
  color: var(--color-text-muted);
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.8;
}

.tutorial-intro .hero-actions {
  justify-content: flex-start;
  margin-top: 0;
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.tutorial-route {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: start;
  gap: 10px;
  min-height: 310px;
  padding: 54px 30px 34px;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 80% 12%, var(--color-success-soft), transparent 28%),
    var(--color-panel);
  box-shadow: var(--shadow-stage);
}

.tutorial-route::before,
.tutorial-route::after {
  content: "";
  position: absolute;
  pointer-events: none;
  border-radius: var(--radius-pill) var(--radius-pill) 0 0;
  border: 18px solid var(--color-accent-pale);
  border-bottom: 0;
}

.tutorial-route::before {
  right: 8%;
  bottom: 0;
  width: 160px;
  height: 132px;
}

.tutorial-route::after {
  right: 15%;
  bottom: 0;
  width: 96px;
  height: 82px;
  border-color: var(--color-accent-soft);
}

.route-line {
  position: absolute;
  top: 91px;
  right: 11%;
  left: 11%;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-pale);
}

.route-line::after {
  content: "";
  position: absolute;
  inset: 0 36% 0 0;
  border-radius: inherit;
  background: var(--color-accent);
}

.route-stop {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--color-text-muted);
  text-align: center;
}

.route-stop::before {
  content: "";
  width: 20px;
  height: 20px;
  margin: 28px 0 20px;
  border: 6px solid var(--color-panel);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.route-stop:nth-of-type(6)::before {
  background: var(--color-success);
  box-shadow: 0 0 0 3px var(--color-success-soft);
}

.route-index {
  order: -1;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 760;
}

.route-stop strong {
  color: var(--color-text);
  font-size: 15px;
}

.route-stop small {
  margin-top: 4px;
  font-size: 11px;
}

.tutorial-document {
  position: relative;
  padding-bottom: var(--section-space);
}

.tutorial-document > .toc-tabs {
  margin-top: 0;
}

.tutorial-reading {
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.86;
}

.tutorial-reading a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-soft);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.tutorial-reading .button {
  text-decoration: none;
}

.tutorial-step {
  position: relative;
  padding-top: clamp(64px, 8vw, 92px);
  padding-bottom: clamp(54px, 7vw, 78px);
}

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

.step-heading {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  align-items: start;
  gap: 20px;
  margin-bottom: 28px;
}

.step-heading .eyebrow {
  margin-bottom: 10px;
}

.step-heading h2 {
  margin-bottom: 0;
  font-size: clamp(31px, 4vw, 44px);
}

.step-number {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  color: var(--color-white);
  background: var(--color-accent-dark);
  box-shadow: var(--shadow-button);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 760;
}

.step-action {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 30px;
  padding: 18px;
  border-radius: var(--radius-md);
  background: var(--color-panel-soft);
}

.step-action span {
  color: var(--color-text-muted);
  font-size: 13px;
}

.platform-instructions {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.platform-instruction {
  padding: clamp(24px, 4vw, 34px);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-paper);
}

.platform-instruction h3 {
  margin-bottom: 0;
  font-size: 23px;
}

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

.platform-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}

.platform-heading .platform-icon {
  margin-bottom: 0;
}

.platform-label {
  display: block;
  margin-bottom: 2px;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.verification-panel {
  margin-top: 32px;
  padding: clamp(24px, 4vw, 34px);
  border-radius: var(--radius-lg);
  background: var(--color-success-soft);
}

.verification-panel h3 {
  margin-bottom: 18px;
}

.verification-panel .check-list {
  display: grid;
  gap: 12px;
  margin-bottom: 0;
}

.verification-panel .check-list li {
  position: relative;
  padding-left: 28px;
}

.verification-panel .check-list li::before {
  content: "✓";
  position: absolute;
  top: 0;
  left: 0;
  color: var(--color-success-dark);
  font-weight: 800;
}

.tutorial-reading .verdict a {
  font-weight: 720;
}

@media (max-width: 980px) {
  .tutorial-mast-inner {
    grid-template-columns: 1fr;
  }

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

  .tutorial-route {
    min-height: 270px;
  }
}

@media (max-width: 768px) {
  .tutorial-mast {
    padding-top: 48px;
    padding-bottom: 54px;
  }

  .tutorial-route {
    grid-template-columns: 1fr;
    gap: 0;
    min-height: 0;
    padding: 26px;
  }

  .tutorial-route::before,
  .tutorial-route::after,
  .route-line {
    display: none;
  }

  .route-stop {
    min-height: 58px;
    display: grid;
    grid-template-columns: 38px 76px minmax(0, 1fr);
    align-items: center;
    text-align: left;
  }

  .route-stop::before {
    width: 16px;
    height: 16px;
    grid-column: 1;
    grid-row: 1;
    margin: 0;
    border-width: 4px;
  }

  .route-index {
    grid-column: 2;
    grid-row: 1;
  }

  .route-stop strong {
    grid-column: 3;
    grid-row: 1;
  }

  .route-stop small {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
    margin-top: 0;
  }

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

  .tutorial-step {
    padding-top: 64px;
    padding-bottom: 54px;
  }
}

@media (max-width: 560px) {
  .tutorial-intro .hero-actions .button {
    flex: 1 1 132px;
  }

  .tutorial-facts {
    align-items: stretch;
  }

  .tutorial-facts .fact-chip {
    white-space: normal;
  }

  .tutorial-route {
    padding: 20px;
  }

  .route-stop {
    grid-template-columns: 32px 46px minmax(0, 1fr);
  }

  .route-stop small {
    display: none;
  }

  .step-heading {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .step-number {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
  }

  .step-heading h2 {
    font-size: 30px;
  }

  .step-action {
    align-items: stretch;
    flex-direction: column;
  }

  .step-action .button {
    width: 100%;
  }

  .platform-heading {
    align-items: flex-start;
  }

  .platform-instruction {
    padding: 22px;
  }

  .platform-instruction h3 {
    font-size: 20px;
  }
}