body {
    text-align: center;
    background-color: #111;
    color: white;
    font-family: 'Segoe UI Emoji', Arial, sans-serif;
    margin: 0;
    padding: 0;
}

canvas {
    background-color: #2b2b2b;
    border: 3px solid #666;
    margin-top: 10px;
    max-width: 95vw;
    height: auto;
    display: none;
}

h1 {
    margin-top: 15px;
    color: #00ffcc;
    font-size: 24px;
}

#score {
    margin-top: 10px;
    font-size: 18px;
    color: #ffff66;
    font-weight: bold;
    display: none;
}

#leaderboard {
    font-size: 16px;
    margin-top: 10px;
    color: #ffccff;
    display: none;
}

#startBtn {
    margin-top: 15px;
    padding: 10px 20px;
    font-size: 16px;
    background-color: #00cc99;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    color: white;
    font-weight: bold;
}

#startBtn:hover {
    background-color: #00aa88;
}

#mobile-controls {
    margin-top: 15px;
    display: none;
}

#mobile-controls .row {
    display: flex;
    justify-content: center;
    margin-bottom: 5px;
}

.control-btn {
    font-size: 24px;
    padding: 15px 20px;
    margin: 3px;
    border: none;
    border-radius: 10px;
    background-color: #444;
    color: white;
    cursor: pointer;
}

.control-btn:active {
    background-color: #666;
}