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

.nav-item {
    position: relative;
}

.nav-toggle-btn {
    background: none;
    border: none;
    font-family: inherit;
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--clr-muted);
    padding: var(--space-xs) 0;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color var(--trans), border-color var(--trans);
}

.nav-toggle-btn:hover,
.nav-toggle-btn.is-active {
    color: var(--clr-text);
    border-bottom-color: var(--clr-accent);
}

.nav-toggle-btn .arrow {
    font-size: 0.6rem;
    transition: transform var(--trans);
    display: inline-block;
}

.nav-item.is-open .nav-toggle-btn .arrow {
    transform: rotate(180deg);
}

.nav-submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--clr-bg);
    border: 1px solid var(--clr-rule);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    list-style: none;
    padding: var(--space-xs) 0;
    margin-top: 10px;
    min-width: 200px;
    z-index: 1000;
    border-radius: 4px;
	background-color: #fff;
	opacity: 0.9;
}

.nav-item.is-open .nav-submenu {
    display: block;
}

.nav-submenu li a {
    display: block;
    padding: var(--space-xs) var(--space-m);
    color: var(--clr-muted);
    text-decoration: none;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: color var(--trans), background-color var(--trans);
}

.nav-submenu li a:hover {
    color: var(--clr-text);
    background-color: rgba(0, 0, 0, 0.02);
}

/* ==========================================================================
   RESPONSIVE MOBILE NAVIGATION
   ========================================================================== */
@media (max-width: 640px) {
    .site-header {
        height: auto;
        position: relative;
    }
    
    .site-header__inner {
        flex-direction: column;
        align-items: stretch;
        height: auto;
        padding-block: var(--space-m);
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 0;
        align-items: stretch;
        width: 100%;
        margin-top: var(--space-m);
    }
    
    .nav-item {
        width: 100%;
    }
    
    .nav-toggle-btn {
        width: 100%;
        justify-content: center;
        padding-block: var(--space-s);
    }
    
    .nav-submenu {
        position: static;
        transform: none;
        box-shadow: none;
        border: none;
        border-top: 1px solid var(--clr-rule);
        border-bottom: 1px solid var(--clr-rule);
        margin-top: 0;
        background-color: rgba(0, 0, 0, 0.01);
        width: 100%;
        border-radius: 0;
    }
    
    .nav-submenu li a {
        text-align: center;
        padding-block: var(--space-s);
    }

    .nav-item.has-submenu:hover .nav-submenu {
        display: block;
    }
    
    .nav-item.has-submenu:hover .nav-toggle-btn .arrow {
        transform: rotate(180deg);
    }
	.site-nav__link,
    .nav-item > a {
        display: block;
        width: 100%;
        text-align: center;
        padding-block: var(--space-s);
    }
}