body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

#game-title {
    font-size: 48px;
    font-weight: bold;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: 20px;
}

#game-area {
    width: 600px;
    height: 400px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.balloon {
    position: absolute;
    border-radius: 50%;
    cursor: pointer;
    animation: float 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

#score, #timer {
    font-size: 24px;
    color: #fff;
    margin: 10px 0;
}

#controls {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

#start-button, #time-select {
    font-size: 20px;
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#start-button:hover {
    background-color: #45a049;
}

#time-select {
    background-color: #3498db;
}

#time-select:hover {
    background-color: #2980b9;
}

#game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 36px;
    font-weight: bold;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    display: none;
}