body {
    background-image: url('../images/BG.jpg');
    background-size: 100% 100%;
    margin: 0;
}

.container {
    max-width: 530px;
    margin: auto;
    line-height: 0;
}

.img-fluid {
    width: 100%;
}

.btn-fixed-bottom {
    margin: auto;
    text-align: center;
    position: fixed;
    bottom: 0px;
    width: 100%;
    max-width: 360px;
    transform: translateX(-50%);
    left: 50%;
    margin-bottom: 1.5rem;
}

.btn-appoint {
    display: block;
    padding: 0 15px;
}

.btn-appoint img {
    max-width: 360px;
    width: 100%;
}