:root {
  --sidebar-width: 280px;
}

body {
  font-family: "Inter", "Segoe UI", Roboto, sans-serif;
  background: var(--bs-tertiary-bg);
}

.top-nav {
  backdrop-filter: blur(8px);
}

.layout-shell {
  min-height: calc(100vh - 56px);
}

.sidebar {
  width: var(--sidebar-width);
  max-width: 100%;
  border-right: 1px solid var(--bs-border-color);
  background: var(--bs-body-bg);
}

.sidebar .nav-link {
  color: var(--bs-body-color);
  border-radius: 0.5rem;
  margin: 0.125rem 0;
  padding-right: 0.5rem;
}

.sidebar .nav-link:hover {
  background: var(--bs-secondary-bg);
}

.sidebar .nav-link.active {
  background: rgba(var(--bs-primary-rgb), 0.15);
  color: var(--bs-primary-text-emphasis);
  font-weight: 600;
}

.btn-toggle {
  margin-left: auto;
  border: 0;
  background: transparent;
  line-height: 1;
}

.toggle-caret {
  display: inline-block;
  transition: transform 0.15s ease;
}

.btn-toggle.collapsed .toggle-caret {
  transform: rotate(-90deg);
}

.nested-list {
  margin-left: 0.8rem;
  border-left: 1px dashed var(--bs-border-color);
  padding-left: 0.5rem;
}

.nested-list.collapsed {
  display: none;
}

.content-wrap {
  width: calc(100% - var(--sidebar-width));
}

.kb-card {
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.kb-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.08);
}

@media (max-width: 991px) {
  .sidebar {
    width: 100%;
  }

  .content-wrap {
    width: 100%;
  }
}

@media print {
  .top-nav,
  .sidebar {
    display: none !important;
  }

  .content-wrap {
    width: 100%;
  }
}