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

body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(45deg, #ff4e50, #f9d423);
    animation: backgroundChange 10s infinite;
    overflow: hidden;
}

@keyframes backgroundChange {
    0% { background: linear-gradient(45deg, #ff4e50, #f9d423); }
    50% { background: linear-gradient(45deg, #6a82fb, #fc5c7d); }
    100% { background: linear-gradient(45deg, #ff4e50, #f9d423); }
}

.container {
    text-align: center;
}

h1 {
    font-size: 3em;
    color: white;
    margin-bottom: 20px;
}

#countdown {
    font-size: 2em;
    color: white;
    margin-bottom: 50px;
}

.ball {
    position: absolute;
    width: 50px;
    height: 50px;
    background-color: white;
    border-radius: 50%;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
    0%, 100% {
        bottom: 0;
        transform: translateX(-50%) scale(1);
    }
    50% {
        bottom: 200px;
        transform: translateX(-50%) scale(1.2);
    }
}