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

body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-container {
    position: relative;
    width: 400px;
    height: 600px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.menu {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 1;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

button {
    padding: 10px 20px;
    margin: 10px;
    font-size: 16px;
    border: none;
    border-radius: 5px;
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

#gameCanvas {
    width: 100%;
    height: 100%;
    background-color: #87CEEB;
}

#score, #high-score {
    font-size: 20px;
    margin: 10px 0;
    color: #333;
}

#player-name {
    padding: 8px;
    margin: 10px 0;
    font-size: 16px;
    border: 2px solid #4CAF50;
    border-radius: 5px;
    width: 200px;
    text-align: center;
}

#player-name:focus {
    outline: none;
    border-color: #45a049;
}

.leaderboard {
    margin-top: 20px;
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 5px;
    max-height: 200px;
    overflow-y: auto;
}

.leaderboard h3 {
    color: #333;
    margin-bottom: 10px;
}

.leaderboard div {
    padding: 5px;
    border-bottom: 1px solid #ddd;
    color: #333;
}