.tutorial-hero {
  position: relative;
  padding-top: clamp(68px, 10vw, 126px);
  padding-bottom: clamp(52px, 8vw, 92px);
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
}

.tutorial-hero::before {
  position: absolute;
  top: 18%;
  right: -12%;
  width: min(620px, 62vw);
  aspect-ratio: 1;
  border: 1px solid var(--color-accent-18);
  border-radius: 50%;
  box-shadow:
    0 0 80px var(--color-accent-10),
    inset 0 0 80px var(--color-accent-06);
  content: "";
  pointer-events: none;
}

.tutorial-hero::after {
  position: absolute;
  top: 0;
  right: 8%;
  bottom: 0;
  width: 1px;
  background: linear-gradient(
    var(--color-transparent),
    var(--color-accent-35),
    var(--color-transparent)
  );
  content: "";
  pointer-events: none;
}

.tutorial-hero .wrap {
  position: relative;
  z-index: 1;
}

.tutorial-hero h1 {
  max-width: 820px;
}

.tutorial-lead {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

.tutorial-facts {
  display: flex;
  max-width: 100%;
  margin-top: 34px;
  flex-wrap: wrap;
  gap: 10px;
}

.tutorial-facts span {
  display: inline-flex;
  min-height: 38px;
  max-width: 100%;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.tutorial-facts strong {
  color: var(--color-accent);
  font-family: var(--font-body);
  font-size: 12px;
}

.tutorial-nav-section {
  padding-top: 56px;
  padding-bottom: 36px;
}

.visually-compact-title {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tutorial-nav-section .callout {
  max-width: 920px;
  margin-top: 28px;
  margin-bottom: 0;
}

.tutorial-nav-section .callout a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-55);
  text-underline-offset: 3px;
}

.tutorial-section {
  scroll-margin-top: var(--header-height);
}

.tutorial-section + .tutorial-section {
  border-top: 1px solid var(--color-line);
}

.tutorial-layout {
  display: grid;
  grid-template-columns: 112px minmax(0, 820px);
  gap: clamp(28px, 6vw, 76px);
  justify-content: center;
}

.step-marker {
  position: relative;
  min-height: 100%;
  padding-top: 8px;
}

.step-marker::before {
  position: absolute;
  top: 46px;
  bottom: 0;
  left: 7px;
  width: 1px;
  background: linear-gradient(var(--color-accent-55), var(--color-line));
  content: "";
}

.step-marker-code {
  display: block;
  margin-left: 28px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.step-marker-dot {
  position: absolute;
  top: 34px;
  left: 0;
  width: 15px;
  height: 15px;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  background: var(--color-panel);
  box-shadow: 0 0 18px var(--color-accent-55);
}

.step-marker-dot::after {
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--color-accent);
  content: "";
}

.tutorial-copy {
  width: 100%;
}

.tutorial-copy > .eyebrow {
  margin-bottom: 10px;
}

.tutorial-copy > h2 {
  margin-top: 0;
}

.tutorial-copy h3 {
  margin-top: 2.1em;
  font-size: clamp(19px, 2vw, 24px);
}

.tutorial-copy .callout a {
  color: var(--color-accent);
}

.readiness-grid,
.mode-compare,
.verification-flow {
  display: grid;
  margin-top: 34px;
  margin-bottom: 34px;
  gap: 12px;
}

.readiness-grid,
.mode-compare {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.readiness-grid > div,
.mode-compare > div,
.verification-flow > div {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
}

.readiness-grid strong {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.5;
}

.readiness-grid p,
.mode-compare p,
.verification-flow p {
  margin-top: 9px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.65;
}

.mode-compare h3 {
  margin-top: 8px;
  margin-bottom: 0;
  font-size: 18px;
}

.step-next {
  display: flex;
  margin-top: 48px;
  margin-bottom: 0;
  padding-top: 20px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 13px;
}

.step-next span {
  color: var(--color-text-muted);
}

.step-next a {
  text-decoration: none;
}

.verification-flow {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.verification-index {
  display: block;
  margin-bottom: 8px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
}

.verification-flow strong {
  font-size: 15px;
}

.completion-panel {
  display: flex;
  margin-top: 42px;
  padding: clamp(24px, 4vw, 36px);
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  border: 1px solid var(--color-accent-55);
  border-radius: var(--radius-large);
  background: var(--color-panel);
}

.completion-panel h3 {
  margin-top: 8px;
}

.completion-panel p {
  max-width: 520px;
  margin-bottom: 0;
}

.completion-links {
  display: flex;
  flex: none;
  flex-direction: column;
  gap: 10px;
}

.completion-links .button {
  white-space: nowrap;
  text-decoration: none;
}

@media (max-width: 900px) {
  .tutorial-layout {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 28px;
  }

  .step-marker-code {
    margin-left: 25px;
    font-size: 9px;
  }

  .verification-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .completion-panel {
    align-items: flex-start;
    flex-direction: column;
  }

  .completion-links {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
  }
}

@media (max-width: 720px) {
  .tutorial-hero::before {
    top: 36%;
    right: -34%;
    width: 88vw;
  }

  .tutorial-layout {
    display: block;
  }

  .step-marker {
    min-height: 28px;
    margin-bottom: 18px;
    padding-top: 0;
  }

  .step-marker::before {
    top: 7px;
    right: 0;
    bottom: auto;
    left: 16px;
    width: auto;
    height: 1px;
    background: linear-gradient(
      90deg,
      var(--color-accent-55),
      var(--color-line),
      var(--color-transparent)
    );
  }

  .step-marker-code {
    position: relative;
    z-index: 1;
    display: inline-block;
    margin-left: 27px;
    padding-right: 10px;
    background: var(--color-page);
    font-size: 10px;
  }

  .step-marker-dot {
    top: 0;
    left: 0;
  }

  .readiness-grid,
  .mode-compare {
    grid-template-columns: minmax(0, 1fr);
  }

  .completion-links {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }
}

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

  .tutorial-facts span {
    width: 100%;
  }

  .verification-flow {
    grid-template-columns: minmax(0, 1fr);
  }

  .step-next {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .step-marker-dot {
    box-shadow: none;
  }
}