:root {
  --tutorial-visual-width: 560px;
  --tutorial-marker-size: 66px;
  --tutorial-content-gap: 38px;
}

.tutorial-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--border-strong) solid var(--color-accent-dark);
  background: var(--color-panel);
}

.tutorial-hero::before,
.tutorial-hero::after {
  position: absolute;
  border: var(--border-standard) dashed var(--color-border);
  border-radius: 50%;
  content: "";
}

.tutorial-hero::before {
  width: 240px;
  height: 240px;
  top: -120px;
  right: -70px;
}

.tutorial-hero::after {
  width: 160px;
  height: 160px;
  bottom: -92px;
  left: -48px;
}

.tutorial-hero-inner {
  position: relative;
  z-index: 1;
  min-height: 640px;
  padding-top: 82px;
  padding-bottom: 82px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(440px, var(--tutorial-visual-width));
  align-items: center;
  gap: 68px;
}

.tutorial-hero-copy h1 {
  max-width: 650px;
  font-size: clamp(52px, 6vw, 70px);
  letter-spacing: -0.02em;
}

.tutorial-hero-copy .lead {
  max-width: 670px;
}

.tutorial-hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
}

.tutorial-facts {
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  list-style: none;
}

.tutorial-facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-accent-dark);
  font-size: 13px;
  font-weight: 750;
}

.tutorial-route {
  width: 100%;
  padding: 20px;
  border: var(--border-strong) solid var(--color-accent-dark);
  border-radius: var(--radius-large);
  background: var(--color-white);
}

.tutorial-route svg {
  width: 100%;
}

.tutorial-route > p {
  margin: 12px 0 0;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
  text-align: center;
}

.tutorial-route-field {
  fill: var(--color-panel-strong);
  stroke: var(--color-border);
  stroke-width: 2;
}

.tutorial-route-line-under {
  fill: none;
  stroke: var(--color-white);
  stroke-linecap: round;
  stroke-width: 13;
}

.tutorial-route-line {
  fill: none;
  stroke: var(--color-accent);
  stroke-dasharray: 10 12;
  stroke-linecap: round;
  stroke-width: 5;
  animation: tutorial-route-flow 8s linear infinite;
}

.tutorial-route-card rect:first-child {
  fill: var(--color-white);
  stroke: var(--color-accent-dark);
  stroke-width: 4;
}

.tutorial-route-card circle,
.tutorial-route-card rect:not(:first-child) {
  fill: var(--color-panel-strong);
  stroke: var(--color-accent);
  stroke-width: 3;
}

.tutorial-route-card path {
  fill: none;
  stroke: var(--color-accent-dark);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 4;
}

.tutorial-route-shield path {
  fill: var(--color-accent);
  stroke: var(--color-accent-dark);
  stroke-linejoin: round;
  stroke-width: 5;
}

.tutorial-route-shield circle {
  fill: var(--color-warn);
  stroke: var(--color-accent-dark);
  stroke-width: 4;
}

.tutorial-route-shield text {
  fill: var(--color-accent-dark);
  font-family: var(--font-display);
  font-size: 31px;
  font-weight: 850;
  letter-spacing: -0.08em;
}

.tutorial-route-pulse {
  fill: var(--color-warn);
  stroke: var(--color-accent-dark);
  stroke-width: 3;
}

.tutorial-flow {
  position: relative;
  padding-top: 34px;
  padding-bottom: 50px;
}

.tutorial-flow > .toc-tabs {
  margin-bottom: 6px;
}

.tutorial-intro {
  border-bottom: var(--border-standard) solid var(--color-border);
}

.text-link {
  color: var(--color-accent);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: var(--border-standard);
  text-underline-offset: 4px;
}

.text-link:hover {
  color: var(--color-warn);
}

.guide-stage {
  position: relative;
  border-bottom: var(--border-standard) solid var(--color-border);
}

.guide-stage-marker {
  position: absolute;
  top: 98px;
  left: max(var(--gutter), calc((100% - var(--page-width)) / 2 + var(--gutter)));
  width: var(--tutorial-marker-size);
  height: var(--tutorial-marker-size);
  display: grid;
  place-items: center;
  border: var(--border-strong) solid var(--color-accent-dark);
  border-radius: 50%;
  color: var(--color-white);
  background: var(--color-accent);
}

.guide-stage-marker::after {
  position: absolute;
  top: calc(100% + 8px);
  bottom: -96px;
  left: 50%;
  border-left: var(--border-standard) dashed var(--color-accent);
  content: "";
}

.guide-stage-marker span {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 850;
}

.guide-stage .reading-wrap {
  max-width: calc(var(--reading-width) + (var(--gutter) * 2) + 80px);
}

.guide-stage .prose p {
  margin-bottom: 22px;
}

.guide-action {
  margin-top: 34px;
  padding: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  border: var(--border-strong) solid var(--color-accent-dark);
  border-radius: var(--radius-large);
  background: var(--color-panel);
}

.guide-action strong {
  display: block;
  margin-bottom: 5px;
  color: var(--color-accent-dark);
  font-size: 18px;
}

.guide-action p {
  margin-bottom: 0;
}

.platform-stage {
  background: var(--color-panel);
}

.platform-stage > .wrap {
  padding-left: calc(var(--gutter) + var(--tutorial-marker-size) + var(--tutorial-content-gap));
}

.platform-guide-list {
  display: grid;
  gap: 22px;
}

.platform-guide {
  padding: clamp(24px, 4vw, 38px);
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 24px;
  border: var(--border-standard) solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-white);
}

.platform-guide-icon {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border: var(--border-standard) solid var(--color-accent-dark);
  border-radius: var(--radius-medium);
  color: var(--color-white);
  background: var(--color-accent);
}

.platform-guide-icon svg {
  width: 31px;
  height: 31px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.platform-guide-copy h3 {
  font-size: 24px;
}

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

.download-panel {
  margin-top: 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
}

.download-panel h3 {
  margin-bottom: 8px;
}

.download-panel p {
  margin-bottom: 0;
}

.completion-panel {
  margin-top: 36px;
  padding: clamp(26px, 5vw, 42px);
  border: var(--border-strong) solid var(--color-accent-dark);
  border-radius: var(--radius-large);
  background: var(--color-panel-strong);
}

.completion-panel .badge {
  margin-bottom: 18px;
  background: var(--color-white);
}

.completion-panel h3 {
  font-size: clamp(25px, 3vw, 34px);
}

.completion-links {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@keyframes tutorial-route-flow {
  to {
    stroke-dashoffset: -88;
  }
}

@media (max-width: 1100px) {
  .tutorial-hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(390px, 0.8fr);
    gap: 36px;
  }

  .guide-stage-marker {
    display: none;
  }

  .platform-stage > .wrap {
    padding-left: var(--gutter);
  }
}

@media (max-width: 900px) {
  .tutorial-hero-inner {
    min-height: 0;
    padding-top: 64px;
    padding-bottom: 72px;
    grid-template-columns: 1fr;
  }

  .tutorial-route {
    width: min(100%, var(--tutorial-visual-width));
    justify-self: center;
  }

  .guide-action,
  .download-panel {
    grid-template-columns: 1fr;
  }

  .guide-action .button,
  .download-panel .button {
    width: fit-content;
  }
}

@media (max-width: 640px) {
  .tutorial-hero::before,
  .tutorial-hero::after {
    display: none;
  }

  .tutorial-hero-inner {
    padding-top: 46px;
    padding-bottom: 58px;
  }

  .tutorial-hero-copy h1 {
    font-size: clamp(32px, 10vw, 40px);
    line-height: 1.12;
  }

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

  .tutorial-facts {
    display: grid;
  }

  .tutorial-route {
    padding: 10px;
    border-width: var(--border-standard);
  }

  .tutorial-flow {
    padding-top: 18px;
  }

  .guide-stage .reading-wrap {
    padding-inline: 0;
  }

  .platform-stage > .wrap {
    padding-inline: 0;
  }

  .platform-stage .section-heading {
    padding-inline: 0;
  }

  .platform-guide {
    padding: 22px;
    grid-template-columns: 1fr;
  }

  .platform-guide-icon {
    width: 50px;
    height: 50px;
  }

  .guide-action,
  .download-panel {
    padding: 22px;
  }

  .guide-action .button,
  .download-panel .button,
  .completion-links .button {
    width: 100%;
  }

  .completion-links {
    flex-direction: column;
  }
}

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