:root {
  --tutorial-line-width: 2px;
  --tutorial-mark-size: 42px;
  --tutorial-reading-gap: clamp(56px, 8vw, 92px);
}

.tutorial-hero {
  position: relative;
  padding-top: clamp(64px, 9vw, 112px);
  padding-bottom: clamp(54px, 8vw, 94px);
  overflow-x: clip;
  text-align: center;
}

.tutorial-hero__inner {
  position: relative;
}

.tutorial-hero__inner::before {
  position: absolute;
  z-index: -1;
  top: -80px;
  left: 50%;
  width: min(720px, 92vw);
  height: 360px;
  border-radius: var(--radius-pill);
  background: radial-gradient(closest-side, var(--color-glow), var(--color-transparent));
  content: "";
  pointer-events: none;
  transform: translateX(-50%);
}

.tutorial-hero h1 {
  margin-top: 22px;
  margin-bottom: 20px;
  font-weight: 440;
}

.tutorial-hero__copy {
  max-width: 760px;
  margin-right: auto;
  margin-bottom: 0;
  margin-left: auto;
  color: var(--color-text-muted);
  font-size: clamp(16px, 2vw, 19px);
}

.tutorial-hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 30px;
}

.tutorial-progress {
  display: flex;
  max-width: 940px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 42px auto 0;
  padding: 18px 22px;
  border: 1px solid var(--color-edge);
  border-radius: var(--radius-pill);
  background: var(--color-panel-glass);
  box-shadow: var(--shadow-card);
}

.tutorial-progress__item {
  display: inline-flex;
  min-width: 66px;
  min-height: 34px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: var(--color-panel);
  font-family: var(--font-mono);
  font-size: 12px;
}

.tutorial-progress__item.is-current {
  border-color: var(--color-accent-strong);
  color: var(--color-bg);
  background: var(--color-accent);
  box-shadow: var(--shadow-button);
}

.tutorial-progress i {
  width: min(72px, 7vw);
  height: var(--tutorial-line-width);
  flex: 1 1 44px;
  background: var(--color-border);
}

.tutorial-body {
  padding-top: 28px;
  padding-bottom: 40px;
}

.tutorial-body > .callout {
  margin-bottom: var(--tutorial-reading-gap);
}

.tutorial-step {
  position: relative;
  padding-top: 22px;
  padding-bottom: var(--tutorial-reading-gap);
}

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

.tutorial-step__mark {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  margin-bottom: 16px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.tutorial-step h2 {
  margin-bottom: 26px;
}

.tutorial-step h3 {
  margin-top: 0;
  color: var(--color-text);
  font-size: clamp(21px, 3vw, 27px);
}

.tutorial-step p {
  margin-bottom: 1.15em;
}

.tutorial-step__action {
  margin-top: 30px;
}

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

.platform-instruction {
  position: relative;
  min-width: 0;
  padding: clamp(24px, 4vw, 34px);
  border: 1px solid var(--color-edge);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.platform-instruction::before {
  position: absolute;
  top: 28px;
  left: 0;
  width: 3px;
  height: var(--tutorial-mark-size);
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  background: var(--color-accent);
  content: "";
}

.tutorial-body pre {
  margin-top: 24px;
  margin-bottom: 24px;
}

.tutorial-body code {
  color: var(--color-accent);
}

@media (max-width: 768px) {
  .tutorial-progress {
    gap: 7px;
    padding: 14px;
    border-radius: var(--radius-lg);
  }

  .tutorial-progress__item {
    min-width: 0;
    flex: 1 1 auto;
    padding-right: 7px;
    padding-left: 7px;
    font-size: 11px;
  }

  .tutorial-progress i {
    display: none;
  }
}

@media (max-width: 640px) {
  .tutorial-hero {
    padding-top: 52px;
    padding-bottom: 56px;
  }

  .tutorial-hero__actions {
    align-items: stretch;
    flex-direction: column;
  }

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

  .tutorial-progress {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    width: 100%;
  }

  .tutorial-progress__item {
    min-height: 42px;
    white-space: normal;
  }

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

  .platform-instruction {
    padding: 22px 20px;
  }
}

@media (max-width: 390px) {
  .tutorial-progress {
    grid-template-columns: 1fr;
  }

  .tutorial-progress__item {
    width: 100%;
  }
}