/**
 * CivicOS Navigation Styles
 *
 * Dropdown navigation for desktop and mobile hamburger menu.
 * Uses existing Givvy design tokens.
 */

/* ========================================
   Navigation Base
   ======================================== */

.main-navigation {
    display: flex;
    align-items: center;
}

/* Override timeline.css overflow to allow dropdowns */
.masthead-header .main-navigation {
    overflow: visible;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-1);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    color: var(--color-neutral-700, #45403B);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold, 600);
    border-radius: var(--radius-8);
    transition: background-color 0.2s ease, color 0.2s ease;
    white-space: nowrap;
}

.nav-link:hover {
    background: var(--bg-subtle);
    color: var(--brand-default);
}

/* Ensure good contrast on light backgrounds */
.masthead-header .nav-link {
    color: var(--color-neutral-800, #292623);
}

/* ========================================
   Dropdown Arrow
   ======================================== */

.dropdown-arrow {
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.has-dropdown:hover .dropdown-arrow,
.has-dropdown.is-open .dropdown-arrow {
    transform: rotate(180deg);
}

/* ========================================
   Dropdown Menu
   ======================================== */

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    min-width: 220px;
    margin: 0;
    padding: var(--space-2);
    list-style: none;
    background: var(--surface-raised);
    border-radius: var(--radius-12);
    box-shadow: var(--shadow-dropdown);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

/* Show dropdown on hover (desktop) */
.has-dropdown:hover .dropdown-menu,
.has-dropdown.is-open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(var(--space-2));
}

.dropdown-item {
    margin: 0;
}

.dropdown-item a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-8);
    transition: background-color 0.15s ease, color 0.15s ease;
}

.dropdown-item a:hover {
    background: var(--bg-subtle);
    color: var(--brand-default);
}

.dropdown-icon {
    font-size: var(--font-size-md);
}

.dropdown-divider {
    height: 1px;
    margin: var(--space-2) 0;
    background: var(--border-default);
}

/* ========================================
   Mobile Toggle Button
   ======================================== */

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-toggle-icon {
    top: 50%;
    transform: translate(-50%, -50%);
}

.nav-toggle-icon::before {
    content: '';
    top: -7px;
}

.nav-toggle-icon::after {
    content: '';
    top: 7px;
}

/* Hamburger to X animation */
.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
    top: 0;
    transform: translateX(-50%) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
    top: 0;
    transform: translateX(-50%) rotate(-45deg);
}

/* ========================================
   Mobile Styles
   ======================================== */

@media (max-width: 900px) {
    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .nav-menu {
        position: fixed;
        top: 100px; /* Adjust based on masthead height */
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: var(--space-4);
        background: var(--bg-default);
        overflow-y: auto;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }

    .nav-menu.is-open {
        transform: translateX(0);
    }

    .nav-item {
        border-bottom: 1px solid var(--border-default);
    }

    .nav-item:last-child {
        border-bottom: none;
    }

    .nav-link {
        padding: var(--space-4);
        font-size: var(--font-size-md);
        justify-content: space-between;
    }

    /* Mobile Dropdown */
    .has-dropdown .dropdown-toggle {
        cursor: pointer;
    }

    .dropdown-menu {
        position: static;
        min-width: 100%;
        margin: 0;
        padding: 0 0 0 var(--space-4);
        background: transparent;
        border-radius: 0;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .has-dropdown.is-open .dropdown-menu {
        max-height: 500px;
    }

    .dropdown-item a {
        padding: var(--space-3) var(--space-4);
        font-size: var(--font-size-md);
    }

    .dropdown-divider {
        display: none;
    }
}

/* ========================================
   Keyboard Focus States
   ======================================== */

.nav-link:focus-visible,
.dropdown-item a:focus-visible,
.nav-toggle:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

/* ========================================
   Skip Link Enhancement
   ======================================== */

.skip-link:focus {
    position: fixed;
    top: var(--space-4);
    left: var(--space-4);
    z-index: 9999;
    padding: var(--space-3) var(--space-4);
    background: var(--brand-default);
    color: var(--color-neutral-0);
    text-decoration: none;
    border-radius: var(--radius-8);
    box-shadow: var(--shadow-3);
}

/* ========================================
   Dark Mode Adjustments
   ======================================== */

@media (prefers-color-scheme: dark) {
    .dropdown-menu {
        border: 1px solid var(--border-default);
    }

    .nav-toggle-icon,
    .nav-toggle-icon::before,
    .nav-toggle-icon::after {
        background: var(--text-primary);
    }
}