/**
 * Dropdown Submenu for Blog Categories
 * Accessible keyboard navigation included
 */

/* =============================================================================
   Skip Link - for keyboard users (hidden until focused)
   ============================================================================= */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 10000;
  background: var(--primary);
  color: var(--theme);
  padding: 8px 16px;
  text-decoration: none;
  font-weight: 600;
  border-radius: 0 0 4px 0;
}

.skip-link:focus {
  position: fixed;
  top: 0;
  left: 0;
  width: auto;
  height: auto;
  overflow: visible;
  outline: 2px solid var(--theme);
  outline-offset: 2px;
}

/* =============================================================================
   Main menu links - focus styling (override PaperMod)
   ============================================================================= */
#menu > li > a:focus,
#menu > li > a:focus-visible,
.nav a:focus,
.nav a:focus-visible,
.logo a:focus,
.logo a:focus-visible {
  outline: 2px solid var(--primary) !important;
  outline-offset: 2px !important;
  border-radius: 2px;
  /* Ensure link is visible and interactive */
  position: relative;
  z-index: 1;
}

#menu > li > a:focus:not(:focus-visible),
.nav a:focus:not(:focus-visible),
.logo a:focus:not(:focus-visible) {
  outline: none !important;
}

/* Ensure menu items themselves are keyboard accessible */
#menu > li {
  position: relative;
  z-index: auto;
}

/* Theme toggle button focus */
#theme-toggle:focus,
#theme-toggle:focus-visible {
  outline: 2px solid var(--primary) !important;
  outline-offset: 2px !important;
  border-radius: 4px;
}

#theme-toggle:focus:not(:focus-visible) {
  outline: none !important;
}

/* =============================================================================
   Override PaperMod nav overflow to allow dropdown
   ============================================================================= */
.nav,
.header,
#menu {
  overflow: visible !important;
}

/* Fix: PaperMod sets overflow-x: auto on #menu which breaks keyboard navigation
   overflow on containers removes elements from sequential focus navigation
   We need visible overflow for both dropdown AND keyboard accessibility */
#menu {
  overflow-x: visible !important;
  overflow-y: visible !important;
}

/* Parent menu item with submenu */
#menu > li.has-submenu {
  position: relative;
}

/* =============================================================================
   Submenu Toggle Button
   ============================================================================= */
.submenu-toggle {
  background: none;
  border: none;
  color: var(--content);
  font-size: inherit;
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0;
  line-height: inherit;
}

.submenu-toggle:hover,
.submenu-toggle:focus {
  color: var(--primary);
}

.submenu-toggle:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 2px;
}

.submenu-toggle:focus:not(:focus-visible) {
  outline: none;
}

.submenu-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Dropdown arrow icon */
.dropdown-arrow {
  display: inline-block;
  vertical-align: middle;
  transition: transform 0.2s ease;
}

/* Rotate arrow when expanded */
.submenu-toggle[aria-expanded="true"] .dropdown-arrow {
  transform: rotate(180deg);
}

/* Submenu styling */
#menu .submenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background: var(--theme);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  padding: 0.5rem 0;
  margin-top: 0.5rem;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.15s ease, visibility 0.15s ease, transform 0.15s ease;
  z-index: 1000;
}

/* Show submenu when button is expanded */
#menu .has-submenu .submenu[aria-hidden="false"],
#menu .has-submenu:hover > .submenu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Submenu items */
#menu .submenu li {
  margin: 0;
  list-style: none;
}

#menu .submenu a {
  display: block;
  padding: 0.6rem 1.2rem;
  color: var(--content);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: normal;
  transition: background-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}

#menu .submenu a:hover,
#menu .submenu a:focus {
  background: var(--code-bg);
  color: var(--primary);
}

#menu .submenu a:focus {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

#menu .submenu a:focus:not(:focus-visible) {
  outline: none;
}

#menu .submenu a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

/* Arrow pointer on top of submenu */
#menu .submenu::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid var(--border);
}

#menu .submenu::after {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 5px solid var(--theme);
}

/* Mobile styles */
@media (max-width: 768px) {
  #menu .submenu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    box-shadow: none;
    border: none;
    border-radius: 0;
    margin-top: 0;
    padding: 0;
    background: transparent;
    min-width: auto;
  }

  #menu .submenu::before,
  #menu .submenu::after {
    display: none;
  }

  #menu .submenu li {
    padding-left: 1rem;
  }

  #menu .submenu a {
    padding: 0.4rem 0;
    font-size: 0.85rem;
    color: var(--secondary);
  }

  #menu .submenu a:hover {
    background: transparent;
    color: var(--primary);
  }

  .dropdown-arrow {
    display: none;
  }
}

/* Dark mode */
.dark #menu .submenu {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}