<nav class="tv-webcore-menubar" aria-label="Site">
  <a class="tv-webcore-menubar-brand" href="#">☾ my homepage</a>
  <ul class="tv-webcore-menubar-list">
    <li><a class="tv-webcore-menubar-item" href="#" aria-current="page">home</a></li>
    <li><a class="tv-webcore-menubar-item" href="#">about me</a></li>
    <li>
      <details class="tv-webcore-menubar-menu">
        <summary class="tv-webcore-menubar-item">stuff</summary>
        <ul class="tv-webcore-menubar-dropdown">
          <li><a class="tv-webcore-menubar-option" href="#">art.gallery</a></li>
          <li><a class="tv-webcore-menubar-option" href="#">music.box</a></li>
          <li><a class="tv-webcore-menubar-option" href="#">shrines</a></li>
        </ul>
      </details>
    </li>
    <li><a class="tv-webcore-menubar-item" href="#">guestbook</a></li>
  </ul>
</nav>

/* A retro OS menu bar for site links: a brand on the left, menu items that invert on hover, one dropdown. */
.tv-webcore-menubar {
  --tv-webcore-menubar-face: var(--tv-webcore-pink, #f7b5e4);
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 4px 14px;
  box-sizing: border-box;
  width: 100%;
  padding: 3px 6px;
  border: 1px solid var(--tv-webcore-navy, #2c2b9f);
  background: var(--tv-webcore-menubar-face, #f7b5e4);
  color: var(--tv-webcore-navy, #2c2b9f);
  font: 14px/1.2 "Lucida Console", "Courier New", ui-monospace, monospace;
  letter-spacing: 0.04em;
  box-shadow: 3px 3px 0 color-mix(in srgb, var(--tv-webcore-navy, #2c2b9f) 25%, transparent);
}

.tv-webcore-menubar-brand {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0 8px;
  border-right: 1px dotted var(--tv-webcore-navy, #2c2b9f);
  color: inherit;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
}

.tv-webcore-menubar-list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tv-webcore-menubar-list > li {
  position: relative;
  display: flex;
}

.tv-webcore-menubar-item {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0 10px;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  list-style: none;
}

.tv-webcore-menubar-item::-webkit-details-marker {
  display: none;
}

/* The current page is underlined; hover and the open menu invert to navy. */
.tv-webcore-menubar-item[aria-current="page"] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.tv-webcore-menubar-item:hover,
.tv-webcore-menubar-menu[open] > .tv-webcore-menubar-item {
  background: var(--tv-webcore-navy, #2c2b9f);
  color: var(--tv-webcore-paper, #ffffff);
}

.tv-webcore-menubar-menu > .tv-webcore-menubar-item::after {
  content: "";
  margin-left: 8px;
  border: 4px solid transparent;
  border-top-color: currentColor;
  border-bottom: 0;
}

.tv-webcore-menubar-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 2;
  min-width: 11rem;
  margin: 3px 0 0;
  padding: 3px;
  border: 1px solid var(--tv-webcore-navy, #2c2b9f);
  background: var(--tv-webcore-paper, #ffffff);
  list-style: none;
  box-shadow: 3px 3px 0 color-mix(in srgb, var(--tv-webcore-navy, #2c2b9f) 30%, transparent);
}

.tv-webcore-menubar-option {
  display: flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0 10px;
  color: inherit;
  text-decoration: none;
}

.tv-webcore-menubar-option:hover {
  background: var(--tv-webcore-menubar-face, #f7b5e4);
}

.tv-webcore-menubar a:focus-visible,
.tv-webcore-menubar summary:focus-visible {
  outline: 2px dashed var(--tv-webcore-navy, #2c2b9f);
  outline-offset: -3px;
}

.tv-webcore-menubar--lilac {
  --tv-webcore-menubar-face: var(--tv-webcore-lilac, #a49bf3);
}

.tv-webcore-menubar--grey {
  --tv-webcore-menubar-face: var(--tv-webcore-grey, #d9d9e5);
}