body {
    background-image: url("../images/bg-sm.jpg");
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.bg-danger-blur {
    background-color: rgba(208, 18, 33, 0.75); backdrop-filter: blur(3px);-webkit-backdrop-filter: blur(3px);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.bg-dark-blur {
    background-color: rgba(0, 0, 0, .75); backdrop-filter: blur(3px);-webkit-backdrop-filter: blur(3px);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.form-check-input:checked {
    background-color: #dc3545;
    border-color: #9f1522;
}

.bg-black {
    background-color: #060606;
}

.bg-sound {
    background-image: url("../images/sound-wave-waves.gif");
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
}

.bg-sound-red {
    background-image: url("../images/red-audio.gif");
    background-repeat: repeat-x;
    background-position: bottom center;
}