/**
 * Navigation — Aqua Source Boise
 * Header topbar, main header, primary nav, mobile menu.
 * No hardcoded values — tokens only.
 *
 * @author Fudo
 * @date   2026-05-01
 * @package aquasource
 */

/* ── Header Topbar ───────────────────────────────────────────────────────── */

.header-topbar {
    background-color: var(--navy-900);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding-block: var(--space-2);
}

.header-topbar__inner {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-6);
}

.header-topbar__contact {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    font-style: normal;
}

.header-topbar__phone,
.header-topbar__email {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--footer-text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.header-topbar__phone:hover,
.header-topbar__email:hover {
    color: var(--orange);
}

.header-topbar__icon {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    stroke: currentColor;
}

/* ── Header Main ─────────────────────────────────────────────────────────── */

.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--color-bg);
    box-shadow: var(--shadow-sm);
}

.header-main {
    padding-block: var(--space-4);
}

.header-main__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-8);
}

/* ── Site Branding ───────────────────────────────────────────────────────── */

.site-branding {
    flex-shrink: 0;
}

.site-logo,
.site-title-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.site-logo img {
    height: 48px;
    width: auto;
}

.site-title {
    font-size: var(--text-xl);
    font-weight: var(--weight-extrabold);
    color: var(--navy-900);
    letter-spacing: var(--tracking-tight);
}

/* ── Primary Navigation ──────────────────────────────────────────────────── */

.site-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

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

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--ink-2);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
    white-space: nowrap;
}

.nav-menu > li > a:hover,
.nav-menu > li.current-menu-item > a,
.nav-menu > li.current-menu-ancestor > a {
    color: var(--navy-800);
    background-color: var(--bg-cool);
}

/* ── Dropdown ────────────────────────────────────────────────────────────── */

.nav-menu .sub-menu {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    min-width: 220px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-2);
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition:
        opacity var(--transition-base),
        visibility var(--transition-base),
        transform var(--transition-base);
    z-index: var(--z-dropdown);
}

.nav-menu > li:hover > .sub-menu,
.nav-menu > li:focus-within > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu .sub-menu li a {
    display: block;
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--ink-2);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-menu .sub-menu li a:hover {
    color: var(--navy-800);
    background-color: var(--bg-cool);
}

/* ── Header Actions ──────────────────────────────────────────────────────── */

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-shrink: 0;
}

.header-cta {
    white-space: nowrap;
}

/* ── Hamburger Toggle ────────────────────────────────────────────────────── */

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: var(--space-2);
    background: none;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.nav-toggle:hover {
    border-color: var(--navy-800);
    background-color: var(--bg-cool);
}

.nav-toggle__bar {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--ink);
    border-radius: var(--radius-full);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Hamburger open state */
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Navigation ───────────────────────────────────────────────────── */

@media (max-width: 1024px) {

    .nav-toggle {
        display: flex;
    }

    .site-nav {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(320px, 85vw);
        background-color: var(--color-bg);
        box-shadow: var(--shadow-xl);
        padding: var(--space-20) var(--space-6) var(--space-8);
        overflow-y: auto;
        transform: translateX(100%);
        transition: transform var(--transition-base);
        z-index: var(--z-overlay);
        justify-content: flex-start;
    }

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

    .nav-menu {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-1);
        width: 100%;
    }

    .nav-menu > li {
        width: 100%;
    }

    .nav-menu > li > a {
        width: 100%;
        padding: var(--space-3) var(--space-4);
        font-size: var(--text-base);
        border-radius: var(--radius-md);
    }

    .nav-menu .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--color-border);
        border-radius: 0;
        padding: var(--space-1) 0 var(--space-1) var(--space-4);
        margin-top: var(--space-1);
    }

    .header-cta {
        display: none;
    }
}

@media (max-width: 768px) {
    .header-topbar {
        display: none;
    }

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

/* ── Nav Overlay (mobile backdrop) ──────────────────────────────────────── */

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(6, 33, 79, 0.5);
    z-index: calc(var(--z-overlay) - 1);
    backdrop-filter: blur(2px);
}

.nav-overlay.is-open {
    display: block;
}

/* ── Dropdown Indicator ──────────────────────────────────────────────────── */

.nav-menu > li.menu-item-has-children > a::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    background-color: currentColor;
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    mask-repeat: no-repeat;
    mask-size: contain;
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.nav-menu > li.menu-item-has-children:hover > a::after {
    transform: rotate(180deg);
}