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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #87CEEB 0%, #98FB98 100%);
    overflow: hidden;
    height: 100vh;
}

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

#ui {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 100;
    color: white;
    font-size: 18px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}

#score, #health {
    margin-bottom: 10px;
    background: rgba(0, 0, 0, 0.5);
    padding: 10px 15px;
    border-radius: 10px;
    backdrop-filter: blur(5px);
}

#startScreen, #gameOverScreen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 200;
}

.startContent, .gameOverContent {
    text-align: center;
    color: white;
    background: rgba(0, 0, 0, 0.7);
    padding: 40px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 2px solid #4CAF50;
    box-shadow: 0 0 30px rgba(76, 175, 80, 0.5);
}

.startContent h1, .gameOverContent h1 {
    font-size: 3em;
    margin-bottom: 20px;
    color: #4CAF50;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.startContent p, .gameOverContent p {
    font-size: 1.2em;
    margin-bottom: 10px;
    color: #E0E0E0;
}

button {
    background: linear-gradient(45deg, #4CAF50, #45a049);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.2em;
    border-radius: 10px;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

button:hover {
    background: linear-gradient(45deg, #45a049, #4CAF50);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
}

button:active {
    transform: translateY(0);
}

.hidden {
    display: none !important;
}

/* Responsive design */
@media (max-width: 768px) {
    .startContent, .gameOverContent {
        padding: 20px;
        margin: 20px;
    }
    
    .startContent h1, .gameOverContent h1 {
        font-size: 2em;
    }
    
    .startContent p, .gameOverContent p {
        font-size: 1em;
    }
    
    button {
        padding: 12px 24px;
        font-size: 1em;
    }
}