body {
    transition: all 1s;
}

.cover {
    width: 0;
    height: 20vh;
    background-color: #1a4d9a;
    border: none;
    position: fixed;
    left: 0;
    z-index: 999;
}

#cover1 {
    top: 0;
}

#cover2 {
    top: 20vh;
}

#cover3 {
    top: 40vh;
}

#cover4 {
    top: 60vh;
}

#cover5 {
    top: 80vh;
    height: 100vh;
}

.anime-cover {
    animation: cover-move 1.5s linear forwards;
}

@keyframes cover-move {
    0% {}
    100% {
        width: 100vw;
    }
}
