* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(to bottom, #87ceeb, #1e90ff); /* Sky background */
}

#gameContainer {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

#plane {
    position: absolute;
    width: 100px;
    height: 100px;
    background-image: url('plane.png'); /* Use your plane image */
    background-size: cover;
    top: 50%;
    left: 20%;
    z-index: 2; /* Keep it on top */
}

#score {
    position: absolute;
    top: 10px;
    left: 10px;
    font-size: 24px;
    color: #fff;
    font-family: Arial, sans-serif;
}

.obstacle {
    position: absolute;
    width: 80px;
    background-image: url('tower.png'); /* Use your building image */
    background-size:cover;
    animation: moveBuilding 4s linear infinite;
    z-index: 1; /* Keep behind the plane */
}

#gameContainer {
    position: relative;
    width: 100%;
    height: 100vh;
    background-image: url('bg.jpg'); /* Use your custom background */
    background-size: cover;
    /* background-repeat: repeat-x; Repeat horizontally */
    background-position: 0 0;
    overflow: hidden;
    animation: scrollBackground 10s linear infinite; /* Infinite scroll */
}

@keyframes scrollBackground {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: -100% 0; /* Moves background horizontally */
    }
}

#comboText {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 24px;
    color: yellow;
    font-family: sans-serif;
    display: none; /* Hidden initially */
    animation: fadeCombo 1s forwards;
}

@keyframes fadeCombo {
    0% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}


@keyframes moveBuilding {
    from {
        right: -80px;
    }
    to {
        right: 100vw;
    }
}