:root {
  --corbas-menu-bg: #080808;
  --corbas-menu-panel: #151515;
  --corbas-menu-text: #ffffff;
  --corbas-menu-muted: #b7b7b7;
  --corbas-menu-accent: #b9dcff;
  --corbas-menu-line: #363636;
}

[data-corbas-navigation] {
  position: sticky;
  top: 0;
  z-index: 10000;
  width: 100%;
  font-family: Arial, Helvetica, sans-serif;
}

.corbas-header {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4%;
  color: var(--corbas-menu-text);
  background: rgba(8, 8, 8, 0.96);
  border-bottom: 1px solid var(--corbas-menu-line);
  box-sizing: border-box;
}

.corbas-wordmark {
  color: var(--corbas-menu-text);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.17em;
  text-decoration: none;
}

.corbas-wordmark span {
  margin-left: 5px;
  color: var(--corbas-menu-accent);
  font-size: 10px;
}

.corbas-main-menu {
  display: flex;
  align-items: center;
  gap: 30px;
}

.corbas-main-menu > a,
.corbas-books-button {
  display: block;
  padding: 24px 0;
  color: var(--corbas-menu-muted);
  background: transparent;
  border: 0;
  font: 600 14px/20px Arial, Helvetica, sans-serif;
  text-decoration: none;
  cursor: pointer;
}

.corbas-main-menu a:hover,
.corbas-main-menu a:focus-visible,
.corbas-books-button:hover,
.corbas-books-button:focus-visible,
.corbas-main-menu .current-page {
  color: var(--corbas-menu-accent);
}

.corbas-dropdown {
  position: relative;
}

.corbas-books-button span {
  display: inline-block;
  margin-left: 5px;
  transition: transform 0.2s ease;
}

.corbas-books-menu {
  position: absolute;
  top: 100%;
  right: 0;
  width: 300px;
  max-height: 70vh;
  margin: 0;
  padding: 10px 20px;
  overflow-y: auto;
  list-style: none;
  visibility: hidden;
  opacity: 0;
  background: var(--corbas-menu-panel);
  border: 1px solid var(--corbas-menu-line);
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.45);
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  box-sizing: border-box;
}

.corbas-books-menu a {
  display: block;
  padding: 10px 0;
  color: var(--corbas-menu-muted);
  border-bottom: 1px solid var(--corbas-menu-line);
  font-size: 14px;
  line-height: 20px;
  text-align: left;
  text-decoration: none;
}

.corbas-books-menu li:last-child a {
  border-bottom: 0;
}

.corbas-dropdown:hover .corbas-books-menu,
.corbas-dropdown:focus-within .corbas-books-menu,
.corbas-dropdown.is-open .corbas-books-menu {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.corbas-dropdown.is-open .corbas-books-button span {
  transform: rotate(45deg);
}

.corbas-menu-button {
  display: none;
  padding: 12px 0;
  color: var(--corbas-menu-text);
  background: transparent;
  border: 0;
  font: 600 14px Arial, Helvetica, sans-serif;
  cursor: pointer;
}

.menu-close-label {
  display: none;
}

.corbas-menu-button[aria-expanded="true"] .menu-open-label {
  display: none;
}

.corbas-menu-button[aria-expanded="true"] .menu-close-label {
  display: inline;
}

@media (max-width: 760px) {
  .corbas-header {
    min-height: 64px;
    padding: 0 5%;
  }

  .corbas-menu-button {
    display: block;
  }

  .corbas-main-menu {
    position: absolute;
    top: 64px;
    right: 0;
    left: 0;
    display: none;
    max-height: calc(100vh - 64px);
    padding: 14px 5% 22px;
    overflow-y: auto;
    background: var(--corbas-menu-bg);
    border-bottom: 1px solid var(--corbas-menu-line);
  }

  .corbas-main-menu.is-open {
    display: block;
  }

  .corbas-main-menu > a,
  .corbas-books-button {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--corbas-menu-line);
    text-align: left;
  }

  .corbas-books-menu {
    position: static;
    display: none;
    width: auto;
    max-height: none;
    padding: 4px 0 10px 20px;
    visibility: visible;
    opacity: 1;
    border: 0;
    box-shadow: none;
    transform: none;
  }

  .corbas-dropdown:hover .corbas-books-menu,
  .corbas-dropdown:focus-within .corbas-books-menu {
    display: none;
  }

  .corbas-dropdown.is-open .corbas-books-menu {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .corbas-books-menu,
  .corbas-books-button span {
    transition: none;
  }
}