.menu {
  box-sizing: border-box;
  width: calc(var(--page-padding) * 2 + 14rem);
  position: sticky;
  top: 0;
  align-self: flex-start;
  height: 100vh;
  padding: var(--page-padding);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.site-title {
  font-size: var(--text-lg);
}

/* Hide unless screen is narrow enough */
.hamburger-btn {
  display: none;
}

.site-title,
.menu-nav-inner > ul > li > a,
.menu-subnav-toggle {
  text-transform: uppercase;
}

.menu-nav-inner,
.menu-nav-inner > ul {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.menu-nav a.is-active,
.menu-subnav-toggle.is-active,
.menu-subnav.is-active:not(.open) > .menu-subnav-toggle {
  color: green;
  text-decoration: underline;
}

.menu-subnav-toggle {
  padding: 0;
  background: none;
  border: none;
  font: inherit;
  cursor: pointer;
}

.menu-subnav-toggle:hover {
  color: green;
}

/* Hide unless screen is narrow enough */
.menu-subnav-fallback {
  display: none;
}

.menu-subnav-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.menu-subnav.open .menu-subnav-panel {
  grid-template-rows: 1fr;
}

.menu-subnav-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.75rem 0 0 1rem;
  overflow: hidden;
}

.menu-subnav-list a {
  font-size: var(--text-sm);
}

.menu-socials {
  display: flex;
  gap: 1.5rem;
}

.admin-controls {
  display: flex;
  gap: 1.5rem;
  position: absolute;
  left: var(--page-padding);
  bottom: var(--page-padding);
}

/* button_to wraps its button in a form; let the button be the flex item. */
.admin-controls form.button_to {
  display: contents;
}

.admin-controls button.admin-controls-link {
  padding: 0;
  background: none;
  border: none;
}

/* Hide unless screen is narrow enough */
.admin-controls-switch {
  display: none;
}

@media (max-width: 1024px) {
  .menu {
    top: auto;
    height: auto;
    align-self: auto;
    z-index: 200;
    width: auto;
    padding: 0;
  }

  .menu-header {
    box-sizing: border-box;
    height: var(--mobile-header-height);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    justify-content: space-between;
    z-index: 101;
    margin-bottom: 0;
    padding: 1rem;
    background: white;
    border-bottom: 1px solid #e8e8e8;
  }

  .hamburger-btn {
    display: block;
    padding: 0;
    border: none;
    background: none;
    cursor: pointer;
  }

  .hamburger-box {
    position: relative;
    display: block;
    width: 1.5rem;
    height: 1.125rem;
    color: black;
  }

  .hamburger-btn:hover .hamburger-box {
    color: green;
  }

  .hamburger-bar {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: currentColor;
    transition: top 0.3s ease, bottom 0.3s ease, opacity 0.2s ease, transform 0.3s ease;
  }

  .hamburger-bar:nth-child(1) { top: 0; }
  .hamburger-bar:nth-child(2) { top: 50%; transform: translateY(-50%); }
  .hamburger-bar:nth-child(3) { bottom: 0; }

  /* Morph the three bars into an X while the menu is open. */
  .hamburger-btn[aria-expanded="true"] .hamburger-bar:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
  }

  .hamburger-btn[aria-expanded="true"] .hamburger-bar:nth-child(2) {
    opacity: 0;
  }

  .hamburger-btn[aria-expanded="true"] .hamburger-bar:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
  }

  .menu-nav {
    position: fixed;
    display: flex;
    inset: 0;
    z-index: 100;
    background: white;
    align-items: center;
    justify-content: center;
    padding-top: var(--mobile-header-height);
    transform: translateY(-100%);
    transition: transform 0.4s ease-in-out;
  }

  .menu-nav.open {
    transform: translateY(0);
    border-bottom: 1px solid #e8e8e8;
  }

  .menu-nav-inner > ul {
    margin-bottom: 0;
  }

  .menu-nav li {
    font-size: var(--text-lg);
  }

  /* Hide subnav sections on mobile. Parent nav items should link to the dedicated subnav index. */
  .menu-subnav-toggle,
  .menu-subnav-panel {
    display: none;
  }

  .menu-subnav-fallback {
    display: block;
  }

  .menu-socials {
    justify-content: flex-start;
    gap: 1.5rem;
  }

  .admin-controls-switch {
    display: flex;
    margin-left: auto;
  }

  .admin-controls {
    position: static;
  }

  .admin-controls .admin-controls-link--switch {
    display: none;
  }
}