body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

.container {
    text-align: center;
}

#colorBox {
    width: 200px;
    height: 200px;
    margin: 20px auto;
    border: 2px solid #333;
    background-color: white;
}

#instructions {
    font-size: 1.2em;
    margin: 20px 0;
}

#targetColor {
    font-weight: bold;
}

button {
    padding: 10px 20px;
    font-size: 1.1em;
    cursor: pointer;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
}

.leaderboard {
    margin-top: 30px;
    padding: 20px;
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

#leaderboardList {
    text-align: left;
    max-width: 300px;
    margin: 0 auto;
}

#leaderboardList .recent-score {
    color: #4CAF50;
    font-weight: bold;
    background-color: #f0fff0;
    padding: 2px 5px;
    border-radius: 3px;
}