:root {
  --topbar-bg: rgba(7, 19, 40, 0.96);
  --topbar-border: #1f3358;
  --topbar-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
  --topbar-link: #dbe9ff;
  --topbar-link-hover: #ffffff;
  --topbar-panel-bg: rgba(11, 24, 51, 0.98);
  --topbar-panel-border: rgba(121, 165, 235, 0.22);
}

body {
  min-height: 100vh;
}

.docs-topbar-wrap {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: 60px;
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--topbar-border);
  box-shadow: var(--topbar-shadow);
}

.docs-topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 60px;
  padding: 0 20px;
}

.docs-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex: 0 0 auto;
}

.docs-brand-logo {
  display: block;
  width: 190px;
  max-width: 48vw;
  height: auto;
}

.docs-nav-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex: 1 1 auto;
  min-width: 0;
}

.docs-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.docs-nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  color: var(--topbar-link);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.docs-nav-link:hover,
.docs-nav-link:focus-visible {
  color: var(--topbar-link-hover);
  border-color: rgba(139, 184, 255, 0.42);
  outline: none;
}

.docs-nav-link.is-active,
.docs-nav-link[aria-current="page"] {
  color: var(--topbar-link-hover);
  border-color: rgba(139, 184, 255, 0.74);
}

.docs-menu-toggle {
  margin-left: auto;
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid rgba(139, 184, 255, 0.24);
  border-radius: 10px;
  background: rgba(11, 24, 51, 0.6);
  color: var(--topbar-link-hover);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.docs-menu-toggle:focus-visible {
  outline: 2px solid rgba(124, 179, 255, 0.75);
  outline-offset: 3px;
}

.docs-menu-toggle-lines {
  display: inline-grid;
  gap: 4px;
}

.docs-menu-toggle-lines span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.top-lang-menu {
  position: relative;
  margin-left: auto;
}

.top-lang-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 28px;
  padding: 8px 0 8px 16px;
  border: 0;
  background: transparent;
  color: var(--topbar-link-hover);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.18s ease;
}

.top-lang-trigger:hover,
.top-lang-menu:hover .top-lang-trigger,
.top-lang-menu.is-open .top-lang-trigger,
.top-lang-menu:focus-within .top-lang-trigger {
  color: #ffffff;
}

.top-lang-trigger:focus-visible {
  outline: 2px solid rgba(124, 179, 255, 0.75);
  outline-offset: 3px;
}

.top-lang-icon {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.top-lang-code {
  letter-spacing: 0.04em;
}

.top-lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  width: 190px;
  padding: 8px;
  display: grid;
  gap: 4px;
  border: 1px solid var(--topbar-panel-border);
  border-radius: 12px;
  background: var(--topbar-panel-bg);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.32);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-2px);
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.top-lang-menu:hover .top-lang-dropdown,
.top-lang-menu.is-open .top-lang-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.top-lang-option {
  width: 100%;
  display: block;
  padding: 11px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: #dbe9ff;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.top-lang-option:hover,
.top-lang-option:focus-visible {
  border-color: rgba(124, 179, 255, 0.24);
  background: rgba(19, 36, 69, 0.6);
  color: #ffffff;
  outline: none;
}

.top-lang-option.is-active {
  border-color: rgba(124, 179, 255, 0.34);
  background: rgba(24, 96, 255, 0.18);
  color: #ffffff;
}

@media (max-width: 900px) {
  .docs-topbar {
    flex-wrap: wrap;
  }

  .docs-menu-toggle {
    display: inline-flex;
  }

  .docs-nav-panel {
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding-top: 12px;
    border-top: 1px solid rgba(120, 162, 227, 0.14);
  }

  .docs-topbar.is-menu-open .docs-nav-panel {
    display: flex;
  }

  .docs-nav {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .docs-nav-link {
    min-height: 44px;
    padding: 0 2px;
    border-bottom-width: 1px;
  }

  .top-lang-menu {
    width: 100%;
    margin-left: 0;
  }

  .top-lang-trigger {
    width: 100%;
    justify-content: space-between;
    min-height: 44px;
    padding: 0 2px;
    border-top: 1px solid rgba(120, 162, 227, 0.14);
  }

  .top-lang-dropdown {
    position: static;
    width: 100%;
    margin-top: 6px;
    transform: none;
  }
}

@media (max-width: 520px) {
  .docs-topbar-wrap {
    position: static;
  }

  .docs-topbar {
    min-height: 60px;
    padding: 0 14px;
  }

  .docs-brand-logo {
    width: 158px;
  }

  .docs-menu-toggle-label {
    display: none;
  }
}