html,
body,
.waiting {
    width: 100%;
    height: 100%;
    margin: 0;
}

.waiting {
    background-color: #00263c;
}

.breath-logo {
    width: 60px;
    height: 60px;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    background: url('./static/images/nio_logo.png') no-repeat;
    background-size: contain;
    animation: fadeInOut 3s linear infinite
}

@keyframes fadeInOut {
    0% {
        opacity: 1
    }

    50% {
        opacity: .5
    }

    to {
        opacity: 1
    }
}