theme.park.app/Resources/landing-page/css/custom.css

@media (min-width: 992px) {
    #mainNav {
        box-shadow: none;
        background-color: rgba(0, 0, 0, 0.55);
        backdrop-filter: blur(10px);
    }

    #mainNav .navbar-brand {
        color: rgba(255, 255, 255, 0.7);
    }

    #mainNav .navbar-brand:hover {
        color: #fff;
    }

    #mainNav .navbar-nav .nav-item .nav-link {
        color: rgba(255, 255, 255, 0.7);
        padding: 0 1rem;
    }

    #mainNav .navbar-nav .nav-item .nav-link:hover {
        color: #fff;
    }

    #mainNav .navbar-nav .nav-item:last-child .nav-link {
        padding-right: 0;
    }

    #mainNav.navbar-scrolled {
        box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
        background-color: rgba(0, 0, 0, 0.55);
        backdrop-filter: blur(10px);
    }

    #mainNav.navbar-scrolled .navbar-brand {
        color: #212529;
    }

    #mainNav.navbar-scrolled .navbar-brand:hover {
        color: #12afa0;
    }

    #mainNav.navbar-scrolled .navbar-nav .nav-item .nav-link {
        color: #fff;
        ;
    }

    #mainNav.navbar-scrolled .navbar-nav .nav-item .nav-link:hover {
        color: #12afa0;
    }
}

#mainNav {
    box-shadow: none;
    background-color: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(10px);
}

.navbar-light .navbar-toggler-icon {
    filter: invert(1);
}

.mfp-container {
    backdrop-filter: blur(10px);
}

/* BUTTON SHIT*/
.btn-primary {
    color: #fff;
    background-color: #009688;
    border-color: #009688;
}

.btn-primary:hover {
    color: #fff;
    background-color: #12afa0;
    border-color: #12afa0;
}

.btn-primary:focus,
.btn-primary.focus {
    color: #fff;
    background-color: #12afa0;
    border-color: #12afa0;
    box-shadow: 0 0 0 0.2rem #12afa080;
}

.btn-primary.disabled,
.btn-primary:disabled {
    color: #fff;
    background-color: #009688;
    border-color: #009688;
}

.btn-primary:not(:disabled):not(.disabled):active,
.btn-primary:not(:disabled):not(.disabled).active,
.show>.btn-primary.dropdown-toggle {
    color: #fff;
    background-color: #12afa0;
    border-color: #12afa0;
}

.btn-primary:not(:disabled):not(.disabled):active:focus,
.btn-primary:not(:disabled):not(.disabled).active:focus,
.show>.btn-primary.dropdown-toggle:focus {
    box-shadow: 0 0 0 0.2rem #12afa080;
}

hr.divider {
    border-color: #12afa0
}

a {
    color: #fff;
}
a:hover {
    color: #12afa0;
    text-decoration: none;
}
.text-primary {
    color: #12afa0 !important;
}

body,
header.masthead {
    background: black;
  }

/* IMAGE SLIDER */
.jquery-bg-slideshow-wrap-bg-element {
    width: 100%;
    height: 100%;
    background-color: transparent;
}

.bg {
    height: 100%;
    width: 100%;
    background-color: black;
    color: white;
    font-size: 30pt;
    align-items: center;
    justify-content: center;
    display: flex;
    text-align: center;
    text-shadow: 1px 1px 10px black;
    margin: 0;
}


#portfolio .container-fluid .portfolio-box .portfolio-box-caption,
#portfolio .container-sm .portfolio-box .portfolio-box-caption,
#portfolio .container-md .portfolio-box .portfolio-box-caption,
#portfolio .container-lg .portfolio-box .portfolio-box-caption,
#portfolio .container-xl .portfolio-box .portfolio-box-caption {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    width: 100%;
    height: 100%;
    position: absolute;
    bottom: 0;
    text-align: center;
    opacity: 0;
    color: #fff;
    background: transparent;
    transition: opacity 0.25s ease;
    text-align: center;
}

.bg-primary,
.bg-dark {
    background: #2d2d2d;
    /* fallback for old browsers */
    background: -webkit-linear-gradient(to top, #2d2d2d, #000000);
    /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to top, #2d2d2d, #000000);
    /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

}
.theme-overview {
    background: #2d2d2d;
    /* fallback for old browsers */
    background: -webkit-linear-gradient(to bottom, #2d2d2d, #000000);
    /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to bottom, #2d2d2d, #000000);
    /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
    font-family: var(--font-family-sans-serif);
}
#services {
    background: #2d2d2d;
    color: white;
    padding: 0rem 0 8rem 0;
}

.app-container {
    background: rgba(0, 0, 0, 0.2);
    color:rgba(255, 255, 255, 0.7);
    border-radius: 5px;
}
.app-container:hover {
    color: white;
    text-decoration: none;
    background: #47918a80;
}
.app-container:hover img {
    transform: scale(1.1);
}
.app-container img {
    transition: transform .5s;
}

.app-container-image {
    width: 48px;
    height: 48px;
}

p {
    margin-bottom: 0.5rem;
    font-family: "Merriweather Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    font-weight: 500;
    line-height: 1.2;
}
.portfolio-box img {
    object-fit: cover;
    width: 562.4px;
    height: 295.56px;
 }

#portfolio .container-fluid .portfolio-box .portfolio-box-caption.aquamarine-hover:hover {
    background: radial-gradient(ellipse at center, #47918a 0%, #0b3161 100%) center center/cover no-repeat fixed;
    opacity: .9;
}

#portfolio .container-fluid .portfolio-box .portfolio-box-caption.hotline-hover:hover {
    background: radial-gradient(ellipse at center, #F44336 0%, #0b3161 100%) center center/cover no-repeat fixed;
    opacity: .9;
}

#portfolio .container-fluid .portfolio-box .portfolio-box-caption.space-gray-hover:hover {
    background: radial-gradient(ellipse at center, rgba(87, 108, 117, 1) 0%, rgba(37, 50, 55, 1) 100.2%) center center/cover no-repeat fixed;
    opacity: .9;
}

#portfolio .container-fluid .portfolio-box .portfolio-box-caption.organizr-dark-hover:hover {
    background: #1f1f1f;
    opacity: .9;
}

#portfolio .container-fluid .portfolio-box .portfolio-box-caption.dark-hover:hover {
    background: radial-gradient(circle, #3a3a3a, #2d2d2d, #202020, #141414, #000000) center center/cover no-repeat fixed;
    opacity: .9;
}

#portfolio .container-fluid .portfolio-box .portfolio-box-caption.plex-hover:hover {
    background: url("https://raw.githubusercontent.com/gilbN/theme.park/master/Resources/blur-noise.png"), url("https://raw.githubusercontent.com/gilbN/theme.park/master/Resources/preset-light2.png") center center/cover no-repeat fixed;
    opacity: .9;
}