body {
    margin: 0;
    padding: 0;
    background-image: url("bg.jpg");
    background-size: cover;
    overflow: hidden;
    font-family: Arial, sans-serif;
    cursor: crosshair;
}
.slepice-kontejner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.slepice {
    position: absolute;
    left: -150px;
    width: 100px;
    height: 100px;
    background-image: url('flying.gif');
    background-size: contain;
    background-repeat: no-repeat;
    animation: letZleva 10s linear;
}
@keyframes letZleva {
    0% {
        transform: translateX(-150px);
    }
    100% {
        transform: translateX(110vw);
    }
}
#zprava-konec {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 20px;
    text-align: center;
    border-radius: 10px;
    z-index: 1000;
}
#zprava-konec button, .button {
    margin-top: 10px;
    padding: 10px 20px;
    font-size: 16px;
    color: white;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    cursor: pointer;
}
.zelena {
    background-color: #28a745;
}
.zelena:hover {
    background-color: #116323;
}
.seda {
    background-color: #46769e;
}
.seda:hover {
    background-color: #375269;
}
#skore {
    position: fixed;
    top: 10px;
    left: 10px;
    color: white;
    font-size: 20px;
}