.btn,
.filter-button {
    display: inline-flex;
    align-items: center;
    gap: .2em;
    font-size: 18px;
    border: 0.2rem solid rgba(0, 0, 0, 0.4);
    border-radius: 5px;
    color: rgba(0, 0, 0, 0.4);
    margin-bottom: 30px;
}

.btn:hover,
.filter-button:hover {
    transition: color 0.6s;
    border: 0.2rem solid rgba(205, 198, 237, 0.7);
    color: white;
    background-color: rgb(25, 91, 223);
}

.btn:active,
.btn-default:active,
.filter-button:active {
    border: 0.2rem solid rgba(0, 0, 0, 0.4);
    background-color: rgba(255, 0, 0, 0.5);
    color: white;
}

#gallery .title {
    padding-bottom: 1rem;
}

.filter.volantes,
.filter.tarjetas {
    padding-bottom: 2rem !important;
}

.title h4 {
    text-align: center;
}