body,
html {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    overflow: hidden;
    background-color: #000;
}

.background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('img/bg.jpg');
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    z-index: 1;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.65);
    /* Tinted black overlay */
    z-index: 2;
}

.content {
    position: relative;
    z-index: 3;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo {
    height: 200px;
    object-fit: contain;
    /* smooth appearance */
    opacity: 0;
    animation:
        fadeIn 1.5s ease-in 0.5s forwards,
        fadeShadow 1s ease-in 1s forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeShadow {
    from {
        filter: drop-shadow(0px 0px 0px rgba(0, 0, 0, 0));
    }

    to {
        filter: drop-shadow(0px 10px 20px rgba(0, 0, 0, 0.9));
    }
}

@media (max-width: 768px) {
    .logo {
        height: 120px;
    }
}

@media (max-width: 480px) {
    .logo {
        height: 80px;
    }
}