404.css

body {
    background-color: #001b58;
}

main {
    color: white;
    font-family: 'Roboto', sans-serif;
    margin-left: 50px;
    user-select: none;
}

.smile {
    font-size: 100px;
    text-shadow: 0px 0px 3px black;
}

.text {
    position: absolute;
    top: 300px;
}

a {
    color: white;
    text-decoration: none;
    padding: 2px 2px;
}

.button {
    max-width: 250px;
    border: white solid thin;
}

.button h1 {
    text-align: center;
}

@keyframes fade-out {
    from {
        opacity: 1
    }
    to {
        opacity: 0
    }
}

@keyframes fade-in {
    from {
        opacity: 0
    }
    to {
        opacity: 1
    }
}

#face.fadeOut {
    animation-name: fade-out;
    animation-duration: 0.2s;
}

#face.fadeIn {
    animation-name: fade-in;
    animation-duration: 0.2s;
}