.gp-slidein-submenu {
    position: fixed;
    top: 0;
    height: 100%;
    z-index: 9999;
    padding: 2rem;
    overflow-y: auto;
    background-color: #fff;
    transition: left 0.3s ease, right 0.3s ease;

    /* Initial off-screen state for both directions */
    left: auto;
    right: -100%;
}

.gp-slidein-submenu.open.slide-from-right {
    right: 0;
}

.gp-slidein-submenu.open.slide-from-left {
    left: 0;
}

.gp-slidein-submenu.shadow {
    box-shadow: -4px 0 12px rgba(0,0,0,0.2);
}

.gp-slidein-submenu.slide-from-left.shadow {
    box-shadow: 4px 0 12px rgba(0,0,0,0.2); /* reversed for left side */
}

.gp-slidein-submenu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9998;
    background-color: rgba(0,0,0,0.5);
    display: none;
}

.gp-slidein-submenu-overlay.visible {
    display: block;
}

.gp-slidein-submenu-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    background: none;
    border: none;
    cursor: pointer;
}

.gp-slidein-submenu-close img {
    width: 1.5rem;
    height: auto;
    display: block;
}

/* Disable default submenu flyouts completely */
.main-nav .sub-menu {
    display: none !important;
}