.back::before {
    content: '';
    position: fixed;
    z-index: -1;
    display: block;
    top: 0px;
    left: 0px;
    bottom: 0px;
    right: 0px;
    background-image: url('assets/img/golvisch.webp');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
}

@media (max-width:767px) {
    .back::before {
        background-image: url('assets/img/golvischmobo.webp ')!important;
    }
}

/* * Globals */
/* Links */
a,
a:focus,
a:hover {
    color: #3b67b2;
    font-weight: bold;
}

/* Custom default button */
.btn-secondary,
.btn-secondary:hover,
.btn-secondary:focus {
    color: #333;
    text-shadow: none;

    /* Prevent inheritance from `body` */
    background-color: #fff;
    border: .05rem solid #fff;
}

/* * Base structure */
html,
body {
    font-family: Roboto Flex, sans-serif;
}

/* Padding for spacing */
/* .inner {
    padding: 2rem;
} */
/* * Header */
.masthead {
    margin-bottom: 2rem;
}

.masthead-brand {
    margin-bottom: 0;
}

.nav-masthead .nav-link {
    font-weight: bold;
    color: #ffffff;
    background-color: #b21a29;
    padding: 4px 5px;
    margin-left: auto;
    margin-right: auto;
}

.nav-masthead .nav-link:hover,
.nav-masthead .nav-link:focus {
    border-bottom-color: rgba(255,255,255,.25);
    background-color: #3b67b2;
}

.nav-masthead .nav-link + .nav-link {
    margin-left: auto;
    margin-right: auto;
}

.nav-masthead .active {
    color: #fff;
    border-bottom-color: #fff;
    background-color: #3b67b2;
}

@media (min-width: 48em) {
    .masthead-brand {
    }

    .nav-masthead {
    }
}

/* * Cover */
.cover {
    padding: 0 1.5rem;
}

.cover .btn-lg {
    padding: .75rem 1.25rem;
    font-weight: bold;
}

/* * Footer */
.mastfoot {
    color: rgba(255,255,255,.5);
}

/* * Affix and center */
@media (min-width: 40em) {
    /* Pull out the header and footer */
    .masthead {
        position: fixed;
        top: 0;
    }

    .mastfoot {
        position: fixed;
        bottom: 0;
    }

    /* Start the vertical centering */
    .site-wrapper-inner {
        vertical-align: middle;
    }

    /* Handle the widths */
    .masthead,
    .mastfoot,
    .cover-container {
        width: 100%;

        /* Must be percentage or pixels for horizontal alignment */
    }
}

@media (min-width: 62em) {
    .masthead,
    .mastfoot,
    .cover-container {
        width: 42rem;
    }
}

.btn-danger {
    color: #fff;
    background-color: #b21a29;
    border-color: #dc3545;
    text-transform: uppercase;
}

.swirl-in-fwd {
    -webkit-animation: swirl-in-fwd 1s ease-out both;
    animation: swirl-in-fwd 1s ease-out both;
}

@-webkit-keyframes swirl-in-fwd{
    0% {
        -webkit-transform: rotate(-540deg) scale(0);
        transform: rotate(-540deg) scale(0);
        opacity: 0;
    }

    100% {
        -webkit-transform: rotate(0) scale(1);
        transform: rotate(0) scale(1);
        opacity: 1;
    }
}

@keyframes swirl-in-fwd{
    0% {
        -webkit-transform: rotate(-540deg) scale(0);
        transform: rotate(-540deg) scale(0);
        opacity: 0;
    }

    100% {
        -webkit-transform: rotate(0) scale(1);
        transform: rotate(0) scale(1);
        opacity: 1;
    }
}

.wobble-hor-bottom {
    -webkit-animation: wobble-hor-bottom 1s both;
    animation: wobble-hor-bottom 1s both;
}

@-webkit-keyframes wobble-hor-bottom{
    0%,
    100% {
        -webkit-transform: translateX(0);
        transform: translateX(0);
        -webkit-transform-origin: 50% 50%;
        transform-origin: 50% 50%;
    }

    15% {
        -webkit-transform: translateX(-30px) rotate(-6deg);
        transform: translateX(-30px) rotate(-6deg);
    }

    30% {
        -webkit-transform: translateX(15px) rotate(6deg);
        transform: translateX(15px) rotate(6deg);
    }

    45% {
        -webkit-transform: translateX(-15px) rotate(-3.6deg);
        transform: translateX(-15px) rotate(-3.6deg);
    }

    60% {
        -webkit-transform: translateX(9px) rotate(2.4deg);
        transform: translateX(9px) rotate(2.4deg);
    }

    75% {
        -webkit-transform: translateX(-6px) rotate(-1.2deg);
        transform: translateX(-6px) rotate(-1.2deg);
    }
}

@keyframes wobble-hor-bottom{
    0%,
    100% {
        -webkit-transform: translateX(0);
        transform: translateX(0);
        -webkit-transform-origin: 50% 50%;
        transform-origin: 50% 50%;
    }

    15% {
        -webkit-transform: translateX(-30px) rotate(-6deg);
        transform: translateX(-30px) rotate(-6deg);
    }

    30% {
        -webkit-transform: translateX(15px) rotate(6deg);
        transform: translateX(15px) rotate(6deg);
    }

    45% {
        -webkit-transform: translateX(-15px) rotate(-3.6deg);
        transform: translateX(-15px) rotate(-3.6deg);
    }

    60% {
        -webkit-transform: translateX(9px) rotate(2.4deg);
        transform: translateX(9px) rotate(2.4deg);
    }

    75% {
        -webkit-transform: translateX(-6px) rotate(-1.2deg);
        transform: translateX(-6px) rotate(-1.2deg);
    }
}