.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.nav-logo {
    display: inline-flex;
    align-items: center;
    line-height: 0;
}

.nav-logo-img {
    height: calc(var(--nav-height) - 1rem);
    width: auto;
    display: block;
}

.nav-menu {
    display: none;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    position: relative;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text);
    transition: color var(--transition);
    padding: var(--space-sm) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background-color: var(--primary);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform var(--transition);
    border-radius: 2px;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link:hover::after {
    transform: scaleX(1);
}

.nav-link.is-active {
    color: var(--primary);
}

.nav-link.is-active::after {
    transform: scaleX(1);
}

/* Color comes from the .btn-brick utility; this only controls visibility. */
.nav-cta {
    display: none;
}

.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text);
}

.nav-toggle svg {
    width: 1.5rem;
    height: 1.5rem;
}

@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
    .nav-cta {
        display: inline-flex;
    }
    .nav-toggle {
        display: none;
    }
}

/* Mobile menu */
.nav-mobile {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg);
    padding: var(--space-lg);
    flex-direction: column;
    gap: var(--space-md);
    z-index: 999;
    overflow-y: auto;
}

.nav-mobile.is-open {
    display: flex;
}

.nav-mobile .nav-link {
    font-size: var(--text-xl);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border);
}

.nav-mobile .nav-link.is-active {
    color: var(--primary);
}

.nav-mobile .btn {
    margin-top: var(--space-md);
    justify-content: center;
}