.tutorial-page {
  display: grid;
  gap: 1.5rem;
}

.tutorial-head {
  display: grid;
  gap: 1rem;
}

.tutorial-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  color: #94a3b8;
  font-size: 0.95rem;
}

.tutorial-mobile-toolbar {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

.tutorial-layout {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.tutorial-outline,
.tutorial-main {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1.25rem;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.72), rgba(15, 23, 42, 0.52));
  box-shadow: 0 20px 45px rgba(2, 6, 23, 0.22);
}

.tutorial-outline {
  position: sticky;
  top: 1rem;
  padding: 1rem;
  max-height: calc(100vh - 2rem);
  overflow: auto;
}

.tutorial-main {
  padding: 1.5rem;
}

.tutorial-outline-header,
.tutorial-reader-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.tutorial-outline-header {
  margin-bottom: 1rem;
}

.tutorial-reader-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tutorial-outline-eyebrow {
  margin-bottom: 0.35rem;
  color: #93c5fd;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tutorial-outline-close {
  display: none;
  width: 2rem;
  height: 2rem;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #e2e8f0;
  font-size: 1.25rem;
  line-height: 1;
}

.tutorial-outline-list {
  display: grid;
  gap: 0.4rem;
}

.tutorial-outline-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: stretch;
  gap: 0.35rem;
}

.tutorial-outline-item.is-hidden {
  display: none;
}

.tutorial-outline-item.is-overview {
  margin-bottom: 0.35rem;
}

.tutorial-outline-item.is-parent > .tutorial-outline-toggle {
  visibility: visible;
}

.tutorial-outline-item.is-collapsed > .tutorial-outline-toggle::before {
  transform: rotate(-90deg);
}

.tutorial-outline-depth-2 {
  margin-left: 0.85rem;
}

.tutorial-outline-depth-3 {
  margin-left: 1.7rem;
}

.tutorial-outline-depth-4 {
  margin-left: 2.55rem;
}

.tutorial-outline-toggle {
  visibility: hidden;
  align-self: center;
  width: 2rem;
  min-width: 2rem;
  height: 2rem;
  border: 0;
  border-radius: 0.8rem;
  background: rgba(255, 255, 255, 0.04);
  color: #cbd5e1;
}

.tutorial-outline-toggle::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 7px solid currentColor;
  transition: transform 0.2s ease;
}

.tutorial-outline-link {
  display: block;
  min-width: 0;
  padding: 0.6rem 0.75rem;
  border-radius: 0.85rem;
  background: rgba(255, 255, 255, 0.02);
  color: #cbd5e1;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.tutorial-outline-link:hover {
  background: rgba(59, 130, 246, 0.14);
  color: #dbeafe;
  transform: translateX(2px);
}

.tutorial-outline-link.is-active {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.22), rgba(139, 92, 246, 0.22));
  color: #f8fafc;
  box-shadow: inset 0 0 0 1px rgba(147, 197, 253, 0.24);
}

.tutorial-outline-text {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tutorial-body,
.tutorial-section-body {
  color: #e2e8f0;
  line-height: 1.9;
}

.tutorial-body img,
.tutorial-section-body img {
  max-width: 100%;
  height: auto;
  border-radius: 1rem;
}

.tutorial-body a,
.tutorial-section-body a {
  color: #93c5fd;
}

.tutorial-section {
  padding-top: 1.5rem;
  margin-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  scroll-margin-top: 110px;
}

.tutorial-anchor-target {
  scroll-margin-top: 110px;
}

.tutorial-empty {
  padding: 1.25rem;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  border-radius: 1rem;
  color: #94a3b8;
}

.tutorial-outline-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1039;
  background: rgba(2, 6, 23, 0.62);
  backdrop-filter: blur(4px);
}

@media (max-width: 991.98px) {
  .tutorial-mobile-toolbar {
    display: flex;
  }

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

  .tutorial-outline {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1040;
    width: min(88vw, 360px);
    height: 100vh;
    max-height: none;
    border-radius: 0 1.25rem 1.25rem 0;
    transform: translateX(-110%);
    transition: transform 0.24s ease;
  }

  .tutorial-page.is-outline-open .tutorial-outline {
    transform: translateX(0);
  }

  .tutorial-page.is-outline-open .tutorial-outline-backdrop {
    display: block !important;
  }

  .tutorial-outline-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}