*,
body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

a {
    text-decoration: none;
}

li,
ol,
ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.main-bg {
    width: 100%;
    height: 100vh;
    background-image: url('./image/sky-image.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    position: relative;
    overflow-x: hidden;
}

.road {
    background-image: url('./image/road.png');
    height: 200px;
    width: 500%;
    background-repeat: repeat-x;
    background-size: contain;
    display: block;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1;
    animation: road 4s linear infinite;
}

@keyframes road {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-4000px);
    }
}

.buildings {
    height: 250px;
    width: 500%;
    background-image: url('./image/city.png');
    position: absolute;
    background-size: contain;
    background-repeat: repeat-x;
    bottom: 200px;
    left: 0;
    right: 0;
    display: block;
    z-index: 1;
    animation: buildings 20s linear infinite;
}

@keyframes buildings {
    0% {
        transform: translateX(0px);
    }

    100% {
        transform: translateX(-4000px);
    }
}