:root {
  --ksn-bg: #f8fafc;
  --ksn-bg-2: #ffffff;
  --ksn-bg-dark: #0f172a;
  --ksn-bg-dark-2: #111827;
  --ksn-text: #0f172a;
  --ksn-text-soft: #334155;
  --ksn-text-dark: #e2e8f0;
  --ksn-text-dark-soft: #94a3b8;
  --ksn-border: #cbd5e1;
  --ksn-border-dark: #334155;
  --ksn-link: #0f4fa8;
  --ksn-link-dark: #93c5fd;
  --ksn-active: #0b63e5;
  --ksn-shadow: 0 8px 20px -16px rgba(15, 23, 42, 0.35);
  --ksn-radius: 12px;
}

html.ksn-smooth-scroll {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html.ksn-smooth-scroll {
    scroll-behavior: auto;
  }

  .ksn-navigation,
  .ksn-navigation__link,
  .ksn-navigation__toggle-icon,
  .ksn-navigation__progress-bar {
    transition: none !important;
  }
}

.ksn-navigation {
  margin: 1.5rem 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--ksn-border);
  border-radius: var(--ksn-radius);
  background: linear-gradient(180deg, var(--ksn-bg-2) 0%, var(--ksn-bg) 100%);
  color: var(--ksn-text);
  box-shadow: var(--ksn-shadow);
  font-family: inherit;
}

.ksn-navigation.theme-dark {
  background: linear-gradient(180deg, var(--ksn-bg-dark-2) 0%, var(--ksn-bg-dark) 100%);
  color: var(--ksn-text-dark);
  border-color: var(--ksn-border-dark);
}

@media (prefers-color-scheme: dark) {
  .ksn-navigation.theme-auto {
    background: linear-gradient(180deg, var(--ksn-bg-dark-2) 0%, var(--ksn-bg-dark) 100%);
    color: var(--ksn-text-dark);
    border-color: var(--ksn-border-dark);
  }
}

.ksn-navigation.is-sticky {
  position: sticky;
  top: 1rem;
  z-index: 15;
}

.ksn-navigation.is-force-rtl {
  direction: rtl;
  text-align: right;
}

.ksn-navigation.font-classic {
  font-family: Georgia, "Times New Roman", serif;
}

.ksn-navigation.font-compact {
  font-family: Tahoma, Arial, sans-serif;
  letter-spacing: 0;
}

.ksn-navigation.density-compact {
  padding: 0.8rem 0.9rem;
}

.ksn-navigation.layout-minimal {
  border-radius: 8px;
  box-shadow: none;
  background: var(--ksn-bg-2);
}

.ksn-navigation.layout-accent {
  border-inline-start: 4px solid var(--ksn-active);
}

.ksn-navigation__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.9rem;
}

.ksn-navigation__heading-wrap {
  min-width: 0;
}

.ksn-navigation__title {
  margin: 0;
  font-size: 1.04rem;
  line-height: 1.4;
  font-weight: 700;
}

.ksn-navigation__meta {
  margin: 0.25rem 0 0;
  color: var(--ksn-text-soft);
  font-size: 0.78rem;
  line-height: 1.35;
}

.ksn-navigation.theme-dark .ksn-navigation__meta {
  color: var(--ksn-text-dark-soft);
}

@media (prefers-color-scheme: dark) {
  .ksn-navigation.theme-auto .ksn-navigation__meta {
    color: var(--ksn-text-dark-soft);
  }
}

.ksn-navigation__toggle {
  appearance: none;
  border: 1px solid currentColor;
  border-radius: 999px;
  background: transparent;
  color: inherit;
  min-width: 2rem;
  min-height: 2rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ksn-navigation__toggle[aria-expanded="false"] .ksn-navigation__toggle-icon {
  transform: rotate(-90deg);
}

.ksn-navigation__toggle-icon {
  transition: transform 0.2s ease;
}

.ksn-navigation__toggle:focus-visible,
.ksn-navigation__link:focus-visible {
  outline: 2px solid var(--ksn-active);
  outline-offset: 2px;
}

.ksn-navigation__progress {
  margin-top: 0.65rem;
  height: 4px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.24);
  overflow: hidden;
}

.ksn-navigation__progress-bar {
  width: 0;
  height: 100%;
  display: block;
  background: var(--ksn-active);
  transition: width 0.2s ease;
}

.ksn-navigation__list {
  margin: 0.8rem 0 0;
  padding-inline-start: 1.2rem;
}

.ksn-navigation.density-compact .ksn-navigation__list {
  margin-top: 0.6rem;
}

.ksn-navigation__list.is-collapsed {
  display: none;
}

.ksn-navigation__item {
  margin: 0.25rem 0;
}

.ksn-navigation.density-compact .ksn-navigation__item {
  margin: 0.15rem 0;
}

.ksn-navigation__item.level-3 {
  margin-inline-start: 0.9rem;
}

.ksn-navigation__link {
  text-decoration: none;
  color: var(--ksn-link);
  line-height: 1.55;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.ksn-navigation__link:hover {
  opacity: 0.9;
}

.ksn-navigation.theme-dark .ksn-navigation__link {
  color: var(--ksn-link-dark);
}

@media (prefers-color-scheme: dark) {
  .ksn-navigation.theme-auto .ksn-navigation__link {
    color: var(--ksn-link-dark);
  }
}

.ksn-navigation__link[aria-current="true"] {
  color: var(--ksn-active);
  font-weight: 700;
}

.ksn-navigation.layout-accent .ksn-navigation__link[aria-current="true"] {
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

@media (max-width: 768px) {
  .ksn-navigation {
    padding: 0.85rem;
    margin: 1rem 0;
    width: 100%;
    max-width: 100%;
  }

  .ksn-navigation__title {
    font-size: 1rem;
  }
}

@media (min-width: 1024px) {
  .ksn-navigation {
    width: fit-content;
    min-width: 24rem;
    max-width: min(100%, 42rem);
  }
}