.tutorial-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(135deg, var(--color-bg), var(--color-panel));
}

.tutorial-hero::before {
  position: absolute;
  top: 12%;
  right: 8%;
  width: 34%;
  height: 58%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  content: "";
  opacity: .35;
  pointer-events: none;
  transform: rotate(-6deg);
}

.tutorial-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, .85fr);
  gap: clamp(40px, 7vw, 96px);
  align-items: center;
  min-height: 560px;
}

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

.tutorial-hero-copy h1 {
  margin-top: 22px;
}

.tutorial-lead {
  max-width: 650px;
  margin-bottom: 28px;
  font-size: 18px;
  line-height: 1.8;
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 24px;
}

.tutorial-route {
  position: relative;
  display: grid;
  min-height: 310px;
  align-content: space-between;
  overflow: hidden;
}

.tutorial-route::before,
.tutorial-route::after {
  position: absolute;
  border: 1px solid var(--color-accent-strong);
  border-radius: 50%;
  content: "";
  opacity: .22;
  pointer-events: none;
}

.tutorial-route::before {
  top: -86px;
  right: -62px;
  width: 210px;
  height: 210px;
}

.tutorial-route::after {
  bottom: -112px;
  left: -78px;
  width: 250px;
  height: 250px;
}

.tutorial-route-heading,
.tutorial-route-note {
  position: relative;
  z-index: 1;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
}

.tutorial-route-note {
  text-align: right;
}

.journey-map {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.journey-map span {
  display: inline-flex;
  min-width: 58px;
  min-height: 58px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent-strong);
  border-radius: 50%;
  background: var(--color-panel-raised);
  color: var(--color-text);
  font-weight: 750;
  box-shadow: 0 0 22px var(--color-accent-glow-soft);
}

.journey-map i {
  width: clamp(14px, 2vw, 34px);
  height: 1px;
  flex: 1 1 auto;
  background: var(--color-border);
}

.tutorial-document {
  max-width: calc(var(--reading-width) + 260px);
}

.tutorial-document .toc-tabs {
  top: 12px;
}

.tutorial-step {
  position: relative;
  padding-top: clamp(68px, 8vw, 104px);
  padding-bottom: clamp(68px, 8vw, 104px);
  border-bottom: 1px solid var(--color-border);
}

.tutorial-step::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 72px;
  height: 3px;
  background: var(--color-accent);
  content: "";
}

.step-label {
  margin-bottom: 15px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .12em;
}

.tutorial-step h2 {
  max-width: 760px;
  font-size: clamp(30px, 4vw, 46px);
}

.tutorial-step > p,
.platform-instruction p {
  max-width: var(--reading-width);
  font-size: 17px;
  line-height: 1.85;
}

.tutorial-step pre {
  max-width: var(--reading-width);
  margin-bottom: 26px;
}

.step-action {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.platform-instructions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 38px;
}

.platform-instruction {
  min-width: 0;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
}

.platform-instruction h3 {
  position: relative;
  padding-left: 18px;
  font-size: 23px;
}

.platform-instruction h3::before {
  position: absolute;
  top: .32em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent-glow);
  content: "";
}

.platform-instruction p {
  font-size: 15px;
  line-height: 1.78;
}

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

.completion-note {
  display: grid;
  grid-template-columns: minmax(240px, .7fr) minmax(0, 1fr);
  gap: clamp(30px, 6vw, 80px);
  align-items: start;
  margin-top: clamp(68px, 9vw, 120px);
  padding: clamp(28px, 5vw, 52px);
  border: 1px solid var(--color-accent-strong);
  border-radius: var(--radius-large);
  background: var(--color-panel-raised);
  box-shadow: var(--shadow-panel);
}

.completion-note h2 {
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 42px);
}

.completion-note p {
  margin-bottom: 0;
  font-size: 17px;
  line-height: 1.82;
}

@media (max-width: 1040px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 44px;
    padding-bottom: 44px;
  }

  .tutorial-route {
    width: 100%;
    min-height: 260px;
  }
}

@media (max-width: 768px) {
  .tutorial-hero::before {
    display: none;
  }

  .tutorial-hero-grid {
    gap: 34px;
  }

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

  .tutorial-route {
    min-height: 230px;
    padding: 22px;
  }

  .journey-map span {
    min-width: 48px;
    min-height: 48px;
    font-size: 13px;
  }

  .tutorial-step > p {
    font-size: 16px;
  }

  .platform-instructions {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 520px) {
  .tutorial-route {
    display: none;
  }

  .tutorial-facts {
    align-items: flex-start;
    flex-direction: column;
  }

  .tutorial-step {
    padding-top: 58px;
    padding-bottom: 58px;
  }

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

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