.sub-sidebar-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
}

.sub-sidebar {
  position: sticky;
  top: 100px;
  align-self: start;
}

.sub-sidebar-nav {
  border: 2px solid var(--secondary);
  padding: 20px 0;
  background: var(--surface);
}

.sub-sidebar-nav a {
  display: block;
  padding: 10px 20px;
  font-size: 12px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-left: 3px solid transparent;
}

.sub-sidebar-nav a:hover {
  color: var(--primary);
  border-left-color: var(--accent);
  background: rgba(216, 180, 254, 0.05);
}

.sub-main h1 {
  font-size: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--secondary);
}

.sub-main h2 {
  font-size: 1.2rem;
  color: var(--primary);
  margin: 28px 0 12px;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.sub-main p {
  margin-bottom: 16px;
  color: rgba(243, 232, 255, 0.88);
  line-height: 1.65;
}

.sub-main ul {
  margin: 0 0 16px 20px;
  color: rgba(243, 232, 255, 0.88);
}

.sub-main li {
  margin-bottom: 8px;
}

.sub-bg-visual {
  margin: 32px 0;
  height: 200px;
  background-image: url('/images/decorative/decor_8.webp');
  background-size: cover;
  background-position: center;
  border: 2px solid var(--border);
  max-width: 100%;
  width: 100%;
  overflow: hidden;
}

@media (max-width: 768px) {
  .sub-sidebar-layout {
    grid-template-columns: 1fr;
  }

  .sub-sidebar {
    position: static;
  }

  .sub-sidebar-nav {
    display: flex;
    flex-wrap: wrap;
    padding: 12px;
    gap: 4px;
  }

  .sub-sidebar-nav a {
    padding: 8px 12px;
    border-left: none;
    border: 1px solid var(--border);
  }

  .sub-bg-visual {
    max-width: 100%;
    height: 160px;
  }
}