.product-submenu {
    grid-template-columns: repeat(3, minmax(180px, 1fr));
    width: min(820px, calc(100vw - 40px));
    max-height: min(72vh, 680px);
    overflow-y: auto;
}

/* Anchor each desktop panel to its own trigger rather than the header edge. */
@media (min-width: 1081px) {
    .nav-row {
        position: relative;
    }

    .main-nav > .nav-products:not(.nav-road-maintenance) {
        position: static;
    }

    .main-nav {
        position: relative;
    }

    .nav-road-maintenance {
        position: relative;
    }

    .product-submenu {
        width: min(820px, 100%);
        top: 100%;
        right: auto;
        left: 0;
        transform: translateY(-6px);
    }

    body.home .main-nav { --submenu-inset: 30px; }
    body.home #product-submenu {
        left: var(--submenu-inset);
        right: auto;
        width: min(820px, calc(100% - var(--submenu-inset)));
        transform: none;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .nav-products:hover .product-submenu,
    .nav-products:focus-within .product-submenu,
    .nav-products.is-open .product-submenu {
        transform: translateY(0);
    }

    .nav-road-maintenance .road-maintenance-submenu {
        top: 100%;
        right: auto;
        left: 0;
        transform: translateY(-6px);
    }

    .nav-road-maintenance:hover .road-maintenance-submenu,
    .nav-road-maintenance:focus-within .road-maintenance-submenu,
    .nav-road-maintenance.is-open .road-maintenance-submenu {
        transform: translateY(0);
    }
}

@media (min-width: 1081px) and (max-width: 1220px) {
    body.home .main-nav { --submenu-inset: 8px; }
}

body.home .product-submenu {
    background: rgba(9, 37, 31, .25);
    border-color: rgba(255, 255, 255, .42);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    text-shadow: none;
    box-shadow: 0 16px 40px rgba(4, 25, 20, .2);
}

body.home .product-submenu * {
    text-shadow: none;
}

body.home .product-submenu .submenu-category-head > a,
body.home .product-submenu .submenu-all {
    color: #c5e58a;
}

body.home .product-submenu .submenu-products a {
    color: #e5eee9;
}

body.home .product-submenu .submenu-products a:hover,
body.home .product-submenu .submenu-products a:focus-visible {
    color: #c5e58a;
}

body.home .submenu-category:hover {
    background: rgba(255, 255, 255, .08);
}

.submenu-category {
    min-width: 0;
    padding: 12px 13px;
    border-radius: 10px;
}

.submenu-category:hover {
    background: var(--sand);
}

.submenu-category-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.submenu-category-head > a {
    color: var(--ink);
    font-size: 14px;
    font-weight: 850;
}

.category-toggle {
    display: none;
}

.submenu-products {
    display: grid;
    gap: 7px;
    margin-top: 10px;
}

.submenu-products a {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.3;
}

.submenu-products a:hover,
.submenu-products a:focus-visible {
    color: var(--green);
}

.road-maintenance-submenu {
    grid-template-columns: 1fr;
    width: min(340px, calc(100vw - 40px));
}

.road-maintenance-submenu .submenu-category {
    background: transparent;
}

@media (max-width: 1080px) {
    .product-submenu {
        width: auto;
        max-height: 62vh;
        grid-template-columns: 1fr;
        overflow-y: auto;
    }

    .submenu-category {
        padding: 0;
        border-bottom: 1px solid var(--line);
        border-radius: 0;
    }

    .submenu-category:hover {
        background: transparent;
    }

    .submenu-category-head > a {
        flex: 1;
        padding: 12px 8px;
    }

    .category-toggle {
        display: grid;
        place-items: center;
        width: 42px;
        height: 42px;
        padding: 0;
        border: 0;
        background: transparent;
        color: var(--green);
        font-size: 20px;
        cursor: pointer;
    }

    .submenu-products {
        display: none;
        margin: 0;
        padding: 4px 12px 12px 20px;
    }

    .submenu-category.is-open .submenu-products {
        display: grid;
    }

    .submenu-products a {
        padding: 6px 0;
        font-size: 13px;
    }

    .road-maintenance-submenu {
        width: auto;
    }

    .road-maintenance-submenu .submenu-products {
        display: grid;
        padding: 4px 12px 12px 8px;
    }
}

/* Match the homepage desktop navigation breakpoint and override legacy
   trigger-centering rules explicitly. */
@media (min-width: 861px) {
    body.home .nav-row .main-nav { position: relative; }
    body.home .nav-row .main-nav > .nav-products:not(.nav-road-maintenance) {
        position: relative;
    }
    body.home .nav-row #product-submenu {
        position: absolute;
        top: calc(100% + 14px);
        left: 0;
        right: auto;
        width: var(--product-menu-width, 600px);
        transform: none;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}
@media (min-width: 861px) and (max-width: 1220px) {
    body.home .nav-row #product-submenu {
        left: 0;
        width: var(--product-menu-width, 600px);
    }
}