.tutorial-hero-shell {
  padding-top: 22px;
}

.tutorial-hero {
  min-height: 560px;
  padding: 54px;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.78fr);
  align-items: center;
  gap: 58px;
  border: var(--border-thin) solid var(--color-border-dark);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  color: var(--color-white-muted);
}

.tutorial-hero::before,
.tutorial-hero::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.tutorial-hero::before {
  top: 28px;
  right: 28px;
  width: 48px;
  height: 18px;
  border-top: var(--border-thin) solid var(--color-panel-line-strong);
  border-right: var(--border-thin) solid var(--color-panel-line-strong);
}

.tutorial-hero::after {
  bottom: 28px;
  left: 28px;
  width: 48px;
  height: 18px;
  border-bottom: var(--border-thin) solid var(--color-panel-line-strong);
  border-left: var(--border-thin) solid var(--color-panel-line-strong);
}

.tutorial-hero-copy,
.procedure-board {
  min-width: 0;
  position: relative;
  z-index: 1;
}

.tutorial-hero .eyebrow {
  color: var(--color-accent);
}

.tutorial-badge {
  margin-bottom: 20px;
  border-color: var(--color-panel-line-strong);
  background: var(--color-panel-fill);
  color: var(--color-white-muted);
}

.tutorial-hero h1 {
  max-width: 620px;
  margin-bottom: 20px;
  color: var(--color-white);
  font-size: clamp(52px, 5vw, 68px);
}

.tutorial-lead {
  max-width: 620px;
  margin-bottom: 0;
  color: var(--color-white-muted);
  font-size: 18px;
  line-height: 1.8;
}

.tutorial-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
}

.tutorial-actions .button-secondary {
  border-color: var(--color-white);
}

.tutorial-ghost {
  border-color: var(--color-panel-line-strong);
  background: var(--color-panel-fill);
  color: var(--color-white);
}

.tutorial-facts {
  margin-top: 26px;
  padding-top: 17px;
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
  border-top: var(--border-thin) solid var(--color-panel-line);
  color: var(--color-white-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}

.tutorial-facts span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.tutorial-facts span::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: var(--radius-control);
  background: var(--color-accent);
}

.procedure-board {
  overflow: hidden;
  border: var(--border-thin) solid var(--color-panel-line-strong);
  border-radius: var(--radius-board);
  background: var(--color-panel-raised);
}

.procedure-board-head {
  min-height: 82px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: var(--border-thin) solid var(--color-panel-line-strong);
}

.procedure-board-head p {
  margin: 0 0 4px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.procedure-board-head strong {
  color: var(--color-white);
  font-size: 17px;
}

.procedure-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.procedure-state i {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: var(--radius-control);
  background: var(--color-accent);
  animation: tutorial-ready 2.4s ease-in-out infinite;
}

.procedure-track {
  margin: 0;
  padding: 0;
  list-style: none;
}

.procedure-track li {
  min-height: 70px;
  padding: 12px 18px;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  border-bottom: var(--border-thin) solid var(--color-panel-line);
}

.procedure-track li:last-child {
  border-bottom: 0;
}

.procedure-track span {
  color: var(--color-white-soft);
  font-size: 12px;
}

.procedure-track b {
  min-width: 0;
  color: var(--color-white);
  font-size: 14px;
}

.procedure-track em {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 9px;
  font-style: normal;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.tutorial-document {
  padding-top: 56px;
}

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

.tutorial-section {
  padding-top: 58px;
  padding-bottom: 58px;
  border-top: var(--border-thin) solid var(--color-border);
}

.tutorial-section:first-of-type {
  border-top: 0;
}

.step-heading {
  margin-bottom: 24px;
}

.step-code {
  margin-bottom: 8px;
  display: block;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.step-heading h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4.2vw, 42px);
}

.tutorial-section > p {
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.9;
}

.text-link {
  color: var(--color-accent-dark);
  font-weight: 750;
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 4px;
}

.text-link:hover {
  color: var(--color-panel);
  text-decoration-color: var(--color-accent);
}

.step-action {
  margin-top: 28px;
  padding: 17px 19px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 18px;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-board);
  background: var(--color-panel-soft);
}

.step-action span {
  color: var(--color-text-muted);
  font-size: 13px;
}

.platform-guide-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.platform-guide {
  min-width: 0;
  padding: 25px;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-board);
  background: var(--color-page);
}

.platform-guide:nth-child(2),
.platform-guide:nth-child(3) {
  background: var(--color-panel-soft);
}

.platform-guide-head {
  margin-bottom: 17px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.platform-guide-head svg {
  width: 42px;
  height: 42px;
  padding: 9px;
  flex: 0 0 auto;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-logo);
  background: var(--color-page);
  color: var(--color-panel);
}

.platform-guide h3 {
  margin: 0;
  font-size: 22px;
}

.platform-guide p {
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.8;
}

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

.verification-strip {
  margin-top: 30px;
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  border-radius: var(--radius-board);
  background: var(--color-panel);
  color: var(--color-white-muted);
}

.verification-strip span {
  font-size: 13px;
  font-weight: 720;
}

.verification-strip svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
}

.help-links {
  margin-top: 30px;
  display: grid;
  gap: 12px;
}

.help-link {
  padding: 22px;
  display: block;
  transition:
    border-color var(--transition-fast) ease,
    background-color var(--transition-fast) ease,
    transform var(--transition-fast) ease;
}

.help-link:hover {
  border-color: var(--color-accent);
  background: var(--color-panel-soft);
  transform: translateX(4px);
}

.help-link strong {
  display: block;
  color: var(--color-text);
  font-size: 18px;
}

.help-link p {
  margin: 6px 0 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

@keyframes tutorial-ready {
  0%,
  100% {
    opacity: 0.55;
    transform: scale(0.86);
  }

  50% {
    opacity: 1;
    transform: scale(1);
  }
}

@media (max-width: 900px) {
  .tutorial-hero {
    min-height: auto;
    padding: 42px 32px;
    grid-template-columns: 1fr;
  }

  .tutorial-hero h1 {
    font-size: 40px;
  }

  .procedure-board {
    width: 100%;
  }
}

@media (max-width: 680px) {
  .platform-guide-grid {
    grid-template-columns: 1fr;
  }

  .platform-guide:nth-child(3) {
    background: var(--color-page);
  }

  .platform-guide:nth-child(4) {
    background: var(--color-panel-soft);
  }
}

@media (max-width: 640px) {
  .tutorial-hero-shell {
    padding-top: 10px;
  }

  .tutorial-hero {
    padding: 32px 18px;
    border-radius: var(--radius-board);
  }

  .tutorial-hero::before,
  .tutorial-hero::after {
    display: none;
  }

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

  .tutorial-actions .button-secondary,
  .tutorial-actions .button-ghost {
    width: 100%;
  }

  .procedure-board-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .procedure-track li {
    grid-template-columns: 52px minmax(0, 1fr);
  }

  .procedure-track em {
    grid-column: 2;
  }

  .tutorial-document {
    padding-top: 38px;
  }

  .tutorial-section {
    padding-top: 46px;
    padding-bottom: 46px;
  }

  .tutorial-section > p {
    font-size: 16px;
  }

  .step-action {
    align-items: stretch;
    flex-direction: column;
  }

  .step-action .button-primary {
    width: 100%;
  }

  .platform-guide {
    padding: 20px;
  }

  .verification-strip {
    align-items: stretch;
    flex-direction: column;
  }

  .verification-strip svg {
    align-self: center;
    transform: rotate(90deg);
  }
}