/* Versión robusta: fundido absolute sobre el contenedor del fieldset */
.search-filter-input-group.search-filter-field__input {
    position: relative;
}

.search-filter-input-group.search-filter-field__input::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 48px;
    pointer-events: none;
    background: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.9) 70%,
        #ffffff 100%
    );
    z-index: 1;
}