.header-menu {
  position: relative;
  z-index: 30;
  flex: 0 0 auto;
}

.menu-toggle {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  padding: 0;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.menu-toggle i {
  display: block;
  width: 17px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.menu-toggle[aria-expanded="true"] i:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] i:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] i:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.site-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  display: grid;
  align-items: stretch;
  gap: 0;
  width: min(240px, calc(100vw - 32px));
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 14px;
  padding: 7px;
  background: rgba(7, 26, 54, 0.98);
  box-shadow: 0 18px 48px rgba(0, 8, 24, 0.34);
  backdrop-filter: blur(18px);
}

.site-menu[hidden] {
  display: none;
}

.site-menu a {
  display: flex;
  align-items: center;
  min-height: 46px;
  border: 0;
  border-radius: 9px;
  padding: 0 13px;
  color: #c9d3e2;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.site-menu a:hover,
.site-menu a:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  outline: 0;
}

.site-menu a[aria-current="page"] {
  color: #fff;
  background: #1769e0;
}

.menu-guide-group {
  margin: 0;
  border: 0;
}

.menu-guide-group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 46px;
  border-radius: 9px;
  padding: 0 13px;
  color: #c9d3e2;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  list-style: none;
  -webkit-tap-highlight-color: transparent;
}

.menu-guide-group > summary::-webkit-details-marker {
  display: none;
}

.menu-guide-group > summary::after {
  width: 7px;
  height: 7px;
  margin-right: 3px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  content: "";
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.18s ease;
}

.menu-guide-group[open] > summary::after {
  transform: rotate(225deg) translate(-2px, -1px);
}

.menu-guide-group > summary:hover,
.menu-guide-group > summary:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  outline: 0;
}

.menu-guide-group.has-current > summary {
  color: #fff;
}

.menu-guide-links {
  display: grid;
  gap: 3px;
  margin: 0 7px 7px 20px;
  border-left: 1px solid rgba(201, 211, 226, 0.3);
  padding-left: 7px;
}

.site-menu .menu-guide-links a {
  min-height: 42px;
  padding-left: 12px;
}

@media (prefers-reduced-motion: reduce) {
  .menu-toggle i,
  .menu-guide-group > summary::after {
    transition: none;
  }
}