body {
    background-color: black;
}

.agendamento {
    display: block;
    margin: 20px auto;
    width: 20%;
}

hr {
    width: 75%;
}

.bg {
    margin-bottom: 20px;
    width: 100%;
    height: 500px;
    background-color: black;
    background-image: url('/assets/images/4.jpg');
    background-position: center;
    background-repeat: repeat;
}

@media (max-width: 530px) {
    .bg {
        background-size: 150%; /* diminui a imagem */
        margin-top: -11px;
    }
    .agendamento {
        width: 80%;
    }
}