.selectable-container {
    box-sizing: border-box;
    border-radius: 20px;

    background-color: #000000;
    color: #ffffff;

    box-shadow:
        0 0 5px rgba(255, 255, 255, 0.6),
        0 0 15px rgba(255, 255, 255, 0.5),
        0 0 25px rgba(255, 255, 255, 0.4);
}

.selectable-container:hover {
    box-sizing: border-box;

    box-shadow:
        0 0 5px rgba(255, 255, 255, 1),
        0 0 15px rgba(255, 255, 255, 0.8),
        0 0 25px rgba(255, 255, 255, 0.6);
}