* {
    margin: 0;
    padding: 0;
}
 
header {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

header:before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: black;
    opacity: .4;
    z-index: -1;
}

 
h1 {
    font-family: 'Courier New', Courier, monospace;
    font-size: 2.2rem;
    font-weight: 800;
    color: rgb(0, 0, 0);
    margin-bottom: 20px;
    opacity: 50%;
 
}
 
.backgrounds-container {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: -5;
}
 
.background {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 4s ease-in-out;
}

.showing {
    opacity: 1;
}

a {
    -moz-transition: color 0.2s ease, border-bottom-color 0.2s ease;
    -webkit-transition: color 0.2s ease, border-bottom-color 0.2s ease;
    -ms-transition: color 0.2s ease, border-bottom-color 0.2s ease;
    transition: color 0.2s ease, border-bottom-color 0.2s ease;
    color: inherit;
    text-decoration: none;
}

a:before {
        -moz-transition: color 0.2s ease;
        -webkit-transition: color 0.2s ease;
        -ms-transition: color 0.2s ease;
        transition: color 0.2s ease;
}

a:hover {
    color: #69a37d00 !important;
}