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

body {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(to bottom, #87CEEB 0%, #E0F6FF 100%);
    font-family: Arial, sans-serif;
    overflow: hidden;
}

#game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

canvas {
    max-width: 100%;
    max-height: 100%;
    border: 3px solid #333;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

#score-board {
    position: absolute;
    top: 20px;
    left: 20px;
    color: white;
    font-size: 24px;
    font-weight: bold;
    z-index: 100;
    background: rgba(0, 0, 0, 0.5);
    padding: 10px 20px;
    border-radius: 5px;
}

#game-over-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    z-index: 200;
    display: none;
}

#game-over-screen h1 {
    font-size: 48px;
    margin-bottom: 20px;
    color: #FF6B6B;
}

#game-over-screen p {
    font-size: 24px;
    margin-bottom: 30px;
}

#game-over-screen button {
    margin-top: 20px;
    margin-left: 10px;
    padding: 12px 30px;
    font-size: 18px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#game-over-screen button:hover {
    background: #45a049;
}

#instructions {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-size: 16px;
    background: rgba(0, 0, 0, 0.5);
    padding: 10px 20px;
    border-radius: 5px;
    text-align: center;
}