.parallax {
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
}

.parallax-background {
    width: 0px;
    height: auto;
    display: none;
}

.parallax-background, .parallax-placeholder {
    filter: brightness(40%);
}

.parallax-placeholder {
    position: absolute;
    z-index: -200;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.parallax-content {
    height: 100vh;
    padding: 2em 1rem;
}

.parallax-content p {
    font-size: 1.5em;
    text-align: center;
}