.tutorial-page {
  background:
    radial-gradient(circle at 16% 14%, var(--color-accent-soft), var(--color-transparent) 25%),
    linear-gradient(180deg, var(--color-transparent), var(--color-bg-deep));
}

.tutorial-orb {
  top: 34px;
  right: -180px;
  opacity: 0.32;
}

.tutorial-hero {
  position: relative;
  min-height: 650px;
  padding-top: clamp(72px, 8vw, 108px);
  padding-bottom: clamp(66px, 8vw, 104px);
}

.tutorial-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(420px, 0.74fr);
  align-items: center;
  gap: clamp(42px, 7vw, 92px);
}

.tutorial-hero-copy {
  position: relative;
  z-index: 2;
}

.tutorial-hero-copy h1 {
  max-width: 760px;
  margin-top: 22px;
  margin-bottom: 22px;
}

.tutorial-intro {
  max-width: 690px;
  margin-bottom: 26px;
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.8;
}

.tutorial-route-card {
  position: relative;
  min-height: 470px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-window);
  background:
    radial-gradient(circle at 88% 12%, var(--color-accent-soft), var(--color-transparent) 30%),
    var(--color-panel);
  box-shadow: var(--shadow-window), inset 0 1px 0 var(--color-white-medium);
}

.tutorial-route-card::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.48;
  background-image:
    radial-gradient(circle, var(--color-white-strong) 0 1px, var(--color-transparent) 1.4px),
    radial-gradient(circle, var(--color-accent) 0 1px, var(--color-transparent) 1.5px);
  background-position: 18px 26px, 70px 84px;
  background-size: 138px 124px, 194px 182px;
  pointer-events: none;
}

.tutorial-route-head {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: 70px;
  padding-inline: 24px;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--color-border-soft);
  color: var(--color-text);
  background: var(--color-overlay);
  font-size: 14px;
  font-weight: 720;
}

.tutorial-route-body {
  position: relative;
  z-index: 2;
  display: grid;
  padding: 30px 30px 84px;
  gap: 14px;
}

.tutorial-route-line {
  position: absolute;
  top: 54px;
  bottom: 102px;
  left: 49px;
  width: 2px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--color-accent), var(--color-border), var(--color-success));
}

.tutorial-route-item {
  position: relative;
  display: grid;
  min-height: 65px;
  padding: 12px 16px 12px 10px;
  align-items: center;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 13px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-medium);
  background: var(--color-white-soft);
  box-shadow: var(--shadow-bubble);
}

.tutorial-route-item:nth-child(3),
.tutorial-route-item:nth-child(5) {
  margin-left: 32px;
}

.tutorial-route-node {
  position: relative;
  z-index: 2;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 4px solid var(--color-panel);
  border-radius: 50%;
  color: var(--color-text-dark);
  background: var(--color-accent);
  box-shadow: 0 0 0 5px var(--color-accent-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
}

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

.tutorial-route-item strong {
  color: var(--color-text);
  font-size: 14px;
}

.tutorial-route-item div > span {
  margin-top: 2px;
  color: var(--color-text-muted);
  font-size: 11px;
}

.tutorial-plane {
  position: absolute;
  right: 24px;
  bottom: 20px;
  z-index: 3;
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  border-radius: var(--radius-medium);
  color: var(--color-text-dark);
  background: var(--color-accent);
  box-shadow: var(--shadow-button);
}

.tutorial-plane svg {
  width: 24px;
  height: 24px;
  animation: tutorial-plane-move 3s ease-in-out infinite;
}

.tutorial-opening {
  padding-top: 34px;
  padding-bottom: 68px;
}

.tutorial-opening .callout {
  margin-top: 0;
}

.tutorial-opening .callout a,
.guide-stage-panel .callout a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-glow);
  text-underline-offset: 0.18em;
}

.tutorial-opening-copy {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.85;
}

.guide-stage {
  position: relative;
  padding-top: clamp(68px, 8vw, 108px);
  padding-bottom: clamp(68px, 8vw, 108px);
  border-top: 1px solid var(--color-border-soft);
}

.guide-stage:nth-of-type(even) {
  background: var(--color-white-soft);
}

.guide-stage-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.68fr) minmax(0, 1.32fr);
  align-items: start;
  gap: clamp(36px, 7vw, 86px);
}

.guide-stage-aside {
  position: sticky;
  top: var(--toc-offset);
}

.guide-stage-mark {
  display: grid;
  width: 46px;
  height: 46px;
  margin-bottom: 25px;
  place-items: center;
  border: 1px solid var(--color-accent-glow);
  border-radius: 50%;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  box-shadow: 0 0 0 8px var(--color-white-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
}

.guide-stage-aside h2 {
  font-size: clamp(30px, 3.8vw, 44px);
}

.guide-stage-aside p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.guide-stage-panel {
  padding: clamp(25px, 4vw, 42px);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at 100% 0, var(--color-accent-soft), var(--color-transparent) 24%),
    var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.guide-stage-panel h3:first-child {
  padding-top: 0;
}

.guide-actions {
  display: flex;
  margin-top: 32px;
  flex-wrap: wrap;
  gap: 11px;
}

.guide-platforms {
  display: grid;
  gap: 28px;
}

.platform-guide {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border-soft);
  scroll-margin-top: var(--toc-offset);
}

.platform-guide:last-of-type {
  padding-bottom: 0;
  border-bottom: 0;
}

.platform-guide-heading {
  display: flex;
  margin-bottom: 18px;
  align-items: center;
  gap: 15px;
}

.platform-guide-icon {
  display: grid;
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  place-items: center;
  border: 1px solid var(--color-accent-glow);
  border-radius: var(--radius-medium);
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.platform-guide-icon svg {
  width: 25px;
  height: 25px;
}

.platform-guide-label {
  display: block;
  margin-bottom: 4px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 740;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.platform-guide-heading h3 {
  margin-bottom: 0;
  padding-top: 0;
  font-size: clamp(21px, 2.5vw, 27px);
}

.tutorial-finish {
  padding-top: clamp(60px, 8vw, 96px);
  padding-bottom: clamp(72px, 9vw, 118px);
}

.tutorial-finish-panel {
  display: grid;
  padding: clamp(28px, 5vw, 50px);
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
  border: 1px solid var(--color-accent-glow);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at 90% 15%, var(--color-accent-soft), var(--color-transparent) 34%),
    var(--color-panel);
  box-shadow: var(--shadow-window);
}

.tutorial-finish-panel h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 42px);
}

.tutorial-finish-panel p {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

@keyframes tutorial-plane-move {
  0%,
  72%,
  100% {
    transform: translate(0, 0);
  }

  84% {
    transform: translate(5px, -5px);
  }

  92% {
    transform: translate(1px, -1px);
  }
}

@media (max-width: 960px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
  }

  .tutorial-route-card {
    width: min(100%, 620px);
    min-height: 450px;
  }

  .guide-stage-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .guide-stage-aside {
    position: static;
    max-width: 720px;
  }

  .guide-stage-aside h2 {
    max-width: 680px;
  }
}

@media (max-width: 640px) {
  .tutorial-hero {
    min-height: auto;
    padding-top: 48px;
    padding-bottom: 62px;
  }

  .tutorial-intro {
    font-size: 15px;
    line-height: 1.7;
  }

  .tutorial-route-card {
    min-height: 425px;
    border-radius: var(--radius-large);
  }

  .tutorial-route-head {
    min-height: 62px;
    padding-inline: 17px;
  }

  .tutorial-route-body {
    padding: 22px 16px 78px;
  }

  .tutorial-route-line {
    top: 45px;
    bottom: 95px;
    left: 34px;
  }

  .tutorial-route-item {
    min-height: 62px;
    padding-right: 12px;
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 10px;
  }

  .tutorial-route-item:nth-child(3),
  .tutorial-route-item:nth-child(5) {
    margin-left: 18px;
  }

  .tutorial-route-node {
    width: 31px;
    height: 31px;
  }

  .tutorial-plane {
    right: 17px;
    bottom: 15px;
    width: 46px;
    height: 46px;
  }

  .tutorial-opening {
    padding-top: 22px;
    padding-bottom: 54px;
  }

  .guide-stage {
    padding-top: 68px;
    padding-bottom: 68px;
  }

  .guide-stage-mark {
    margin-bottom: 20px;
  }

  .guide-stage-panel {
    padding: 22px;
  }

  .guide-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .guide-actions .button {
    width: 100%;
  }

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

  .platform-guide-icon {
    width: 46px;
    height: 46px;
  }

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

  .tutorial-finish-panel .button {
    width: 100%;
  }
}

@media (max-width: 380px) {
  .tutorial-route-item:nth-child(3),
  .tutorial-route-item:nth-child(5) {
    margin-left: 8px;
  }

  .tutorial-route-item div > span {
    font-size: 10px;
  }

  .guide-stage-panel {
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tutorial-plane svg {
    animation: none;
  }
}