/**
 * Submenu Styles - No Layout Shift
 * Absolute positioning prevents content shifting
 */

/* Base submenu styles */
.menu-item-has-children {
    position: relative;
}

.menu-item-has-children > .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 16rem;
    max-width: 20rem;
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    padding: 0.5rem 0;
    z-index: 50;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

/* Open state */
.menu-item-has-children.submenu-open > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Desktop hover behavior */
@media (min-width: 768px) {
    .menu-item-has-children:hover > .sub-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    /* Ensure parent gets hover state */
    .menu-item-has-children:hover > a {
        color: var(--color-primary, #3b82f6);
    }
}

/* Mobile behavior - stacked, no absolute positioning */
@media (max-width: 767px) {
    .menu-item-has-children > .sub-menu {
        position: static;
        box-shadow: none;
        border: none;
        border-radius: 0;
        background: transparent;
        padding: 0.5rem 0 0 1rem;
        margin-top: 0.25rem;
        transform: none;
        opacity: 1;
        visibility: visible;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
    }
    
    .menu-item-has-children.submenu-open > .sub-menu {
        max-height: 500px;
        padding: 0.5rem 0 0.5rem 1rem;
    }
}

/* Submenu item styles */
.sub-menu li {
    position: relative;
}

.sub-menu a {
    display: block;
    padding: 0.5rem 1rem;
    color: #374151;
    text-decoration: none;
    border-radius: 0.375rem;
    margin: 0 0.25rem;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.sub-menu a:hover,
.sub-menu a:focus {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--color-primary, #3b82f6);
    outline: none;
}

.sub-menu a:focus {
    box-shadow: 0 0 0 2px var(--color-primary, #3b82f6);
}

/* Dark mode styles */
.dark .menu-item-has-children > .sub-menu {
    background: #1f2937;
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

.dark .sub-menu a {
    color: #d1d5db;
}

.dark .sub-menu a:hover,
.dark .sub-menu a:focus {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

/* Parent link indicator */
.menu-item-has-children > a::after {
    content: "▼";
    margin-left: 0.5rem;
    font-size: 0.75rem;
    transition: transform 0.2s ease;
}

.menu-item-has-children.submenu-open > a::after {
    transform: rotate(180deg);
}

/* Focus management */
.menu-item-has-children > a:focus {
    outline: 2px solid var(--color-primary, #3b82f6);
    outline-offset: 2px;
    border-radius: 0.375rem;
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Animation performance optimization */
.menu-item-has-children > .sub-menu,
.menu-item-has-children > .sub-menu * {
    will-change: opacity, transform;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .menu-item-has-children > .sub-menu {
        transition: none;
    }
    
    .menu-item-has-children > a::after {
        transition: none;
    }
}