:root {
  --tutorial-reading-width: 780px;
  --tutorial-rail-width: 210px;
  --tutorial-route-width: 390px;
}

.tutorial-hero {
  background: linear-gradient(180deg, var(--color-ocean-top) 0%, var(--color-ocean) 58%, var(--color-ocean-low) 100%);
  color: var(--color-white);
  min-height: 590px;
  padding-top: clamp(70px, 9vw, 112px);
  padding-bottom: 104px;
}

.tutorial-hero__curve {
  border-radius: 50%;
  pointer-events: none;
  position: absolute;
}

.tutorial-hero__curve--outer {
  background: var(--color-curve-one);
  height: 680px;
  right: -270px;
  top: -190px;
  width: 680px;
}

.tutorial-hero__curve--inner {
  background: var(--color-curve-two);
  height: 430px;
  right: -120px;
  top: -60px;
  width: 430px;
}

.tutorial-hero__dot {
  background: var(--color-pink);
  border-radius: 50%;
  height: 96px;
  left: -42px;
  position: absolute;
  top: 42%;
  width: 96px;
}

.tutorial-hero__triangle {
  background: var(--color-warning);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  height: 28px;
  left: 44%;
  position: absolute;
  top: 12%;
  transform: rotate(-14deg);
  width: 32px;
}

.tutorial-hero__content {
  align-items: center;
  display: grid;
  gap: clamp(44px, 7vw, 88px);
  grid-template-columns: minmax(0, 1fr) minmax(300px, var(--tutorial-route-width));
  position: relative;
  z-index: 2;
}

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

.tutorial-kicker {
  align-items: center;
  color: var(--color-accent-bright);
  display: flex;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  gap: 10px;
  letter-spacing: .16em;
  margin-bottom: 18px;
}

.tutorial-kicker::before {
  background: var(--color-accent-bright);
  border-radius: var(--radius-pill);
  content: "";
  height: 7px;
  width: 7px;
}

.tutorial-hero h1 {
  color: var(--color-white);
  font-size: clamp(36px, 4vw, 48px);
  max-width: 15em;
}

.tutorial-highlight {
  color: var(--color-accent-bright);
}

.tutorial-lead {
  color: var(--color-white-82);
  font-size: clamp(16px, 1.7vw, 20px);
  line-height: 1.85;
  max-width: 42em;
}

.tutorial-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 30px;
}

.tutorial-facts span {
  border: 1px solid var(--color-white-30);
  border-radius: var(--radius-pill);
  color: var(--color-white-82);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 12px;
}

.tutorial-route {
  background: var(--color-panel);
  border: 1px solid var(--color-white-30);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-window);
  color: var(--color-text);
  min-width: 0;
  overflow: hidden;
  transform: rotate(1.2deg);
}

.tutorial-route__head {
  align-items: center;
  background: var(--color-panel-soft);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: 16px;
  justify-content: space-between;
  padding: 16px 20px;
}

.tutorial-route__label {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .15em;
}

.tutorial-route__list {
  list-style: none;
  margin: 0;
  padding: 14px 20px 18px;
}

.tutorial-route__list li {
  align-items: center;
  border-bottom: 1px dashed var(--color-border);
  display: flex;
  gap: 16px;
  padding: 17px 2px;
}

.tutorial-route__list li:last-child {
  border-bottom: 0;
}

.tutorial-route__number {
  align-items: center;
  background: var(--color-accent-soft);
  border-radius: var(--radius-small);
  color: var(--color-accent-dark);
  display: inline-flex;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  height: 38px;
  justify-content: center;
  width: 46px;
}

.tutorial-route__list strong,
.tutorial-route__list small {
  display: block;
}

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

.tutorial-route__list small {
  color: var(--color-text-muted);
  font-size: 12px;
  margin-top: 2px;
}

.tutorial-main {
  margin-top: -32px;
  position: relative;
  z-index: 4;
}

.tutorial-toc {
  margin-bottom: 24px;
}

.tutorial-platform-note {
  margin-top: 0;
  margin-bottom: 48px;
}

.tutorial-layout {
  align-items: start;
  display: grid;
  gap: clamp(34px, 6vw, 76px);
  grid-template-columns: var(--tutorial-rail-width) minmax(0, var(--tutorial-reading-width));
  justify-content: center;
}

.tutorial-rail {
  background: var(--color-panel-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  padding: 20px;
  position: sticky;
  top: 24px;
}

.tutorial-rail__title {
  color: var(--color-text);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
}

.tutorial-rail ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.tutorial-rail li + li {
  margin-top: 5px;
}

.tutorial-rail a {
  align-items: center;
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
  display: flex;
  font-size: 14px;
  gap: 10px;
  min-height: 42px;
  padding: 7px 9px;
  text-decoration: none;
}

.tutorial-rail a:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.tutorial-rail a span {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
}

.tutorial-rail__hint {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 12px;
  line-height: 1.65;
  margin: 16px 0 0;
  padding-top: 15px;
}

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

.tutorial-intro,
.tutorial-step,
.tutorial-followup,
.tutorial-next {
  scroll-margin-top: 24px;
}

.tutorial-section-label {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.tutorial-checklist {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.tutorial-checklist div {
  background: var(--color-panel-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  padding: 17px 19px;
}

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

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

.tutorial-checklist span {
  color: var(--color-text-muted);
  font-size: 13px;
  margin-top: 3px;
}

.tutorial-step {
  border-top: 1px solid var(--color-border);
  margin-top: 72px;
  padding-top: 68px;
}

.tutorial-step--soft {
  background: var(--color-panel-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  margin-inline: -32px;
  padding: 42px 32px;
}

.tutorial-step__heading {
  margin-bottom: 26px;
}

.tutorial-step__index {
  color: var(--color-accent-dark);
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .13em;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.tutorial-step__heading h2 {
  margin-bottom: 0;
}

.mode-comparison {
  display: grid;
  gap: 13px;
  margin: 32px 0;
}

.mode-comparison article {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  padding: 21px;
}

.mode-comparison h3 {
  font-family: var(--font-body);
  font-size: 18px;
  margin: 13px 0 7px;
}

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

.verification-strip {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 32px 0;
}

.verification-strip div {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  min-width: 0;
  padding: 18px;
}

.verification-strip span,
.verification-strip strong {
  display: block;
}

.verification-strip span {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  margin-bottom: 6px;
}

.verification-strip strong {
  color: var(--color-text);
  font-size: 14px;
}

.tutorial-followup {
  border-top: 1px solid var(--color-border);
  margin-top: 76px;
  padding-top: 68px;
}

.tutorial-next {
  align-items: center;
  background: var(--color-ocean);
  border-radius: var(--radius-large);
  color: var(--color-white);
  display: flex;
  gap: 30px;
  justify-content: space-between;
  margin-top: 72px;
  padding: 34px;
}

.tutorial-next h2 {
  color: var(--color-white);
  font-size: clamp(27px, 3vw, 36px);
  margin-bottom: 10px;
}

.tutorial-next p {
  color: var(--color-white-82);
  margin-bottom: 0;
}

.tutorial-next .tutorial-section-label {
  color: var(--color-accent-bright);
  margin-bottom: 8px;
}

.tutorial-next__actions {
  display: flex;
  flex-shrink: 0;
  flex-wrap: wrap;
  gap: 11px;
  justify-content: flex-end;
}

@media (max-width: 940px) {
  .tutorial-hero__content {
    grid-template-columns: 1fr;
  }

  .tutorial-route {
    max-width: 620px;
    transform: none;
    width: 100%;
  }

  .tutorial-layout {
    grid-template-columns: 1fr;
  }

  .tutorial-rail {
    display: none;
  }

  .tutorial-prose {
    margin-inline: auto;
    max-width: var(--tutorial-reading-width);
    width: 100%;
  }
}

@media (max-width: 768px) {
  .tutorial-hero {
    min-height: 0;
    padding-top: 62px;
    padding-bottom: 92px;
  }

  .tutorial-hero h1 {
    font-size: clamp(26px, 7.4vw, 30px);
  }

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

  .tutorial-hero__curve--outer {
    height: 460px;
    right: -260px;
    width: 460px;
  }

  .tutorial-hero__curve--inner {
    height: 300px;
    right: -180px;
    width: 300px;
  }

  .tutorial-step {
    margin-top: 58px;
    padding-top: 54px;
  }

  .tutorial-step--soft {
    margin-inline: 0;
    padding: 27px 22px;
  }

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

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

  .tutorial-next__actions {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  .tutorial-hero__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .tutorial-hero__actions .btn {
    width: 100%;
  }

  .tutorial-facts span {
    font-size: 11px;
  }

  .tutorial-route__head {
    padding-inline: 16px;
  }

  .tutorial-route__list {
    padding-inline: 15px;
  }

  .tutorial-route__list li {
    gap: 12px;
  }

  .tutorial-platform-note {
    margin-bottom: 38px;
  }

  .tutorial-next {
    padding: 25px 21px;
  }

  .tutorial-next__actions,
  .tutorial-next__actions .button {
    width: 100%;
  }
}