body {
    background-color: #2b2b2b;
    color: white;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0;
    padding-top: 20px;
}

.header {
    width: 300px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.back-btn {
    color: #3498db;
    text-decoration: none;
    font-weight: bold;
    background: #ecf0f1;
    padding: 6px 12px;
    border-radius: 5px;
    color: #2c3e50;
}

.score-board {
    font-size: 20px;
    font-weight: bold;
    color: #e74c3c;
}

.game-area {
    background-color: #111;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0,0,0,0.8);
}

canvas {
    background-color: #000;
    border: 2px solid #555;
    display: block;
}

.instructions {
    margin-top: 20px;
    color: #95a5a6;
    text-align: center;
    line-height: 1.6;
}