#game-container {
    background: #000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    color: #fff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#tetris-canvas {
    background: #111;
    border: 2px solid #555;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.score-board {
    position: absolute;
    top: 20px;
    right: 20px;
    text-align: right;
    font-size: 1.2rem;
}

.score-board div {
    margin-bottom: 5px;
    color: #aaa;
}

.score-board span {
    color: #fff;
    font-weight: 700;
    display: block;
    font-size: 1.5rem;
}

.game-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    padding: 30px;
    border: 2px solid #fff;
    border-radius: 5px;
    text-align: center;
    z-index: 100;
}

.start-btn {
    background: #fff;
    color: #000;
    border: none;
    padding: 12px 30px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    margin-top: 20px;
}