#game-container {
    background: #4ec0ca;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

#flappy-bird-canvas {
    background: transparent;
}

.score-board {
    position: absolute;
    top: 20px;
    font-size: 3rem;
    font-weight: 900;
    text-shadow: 2px 2px 0 #000;
    z-index: 10;
}

.game-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(222, 216, 149, 0.9);
    padding: 30px;
    border: 3px solid #543847;
    border-radius: 10px;
    text-align: center;
    color: #543847;
    z-index: 100;
}

.start-btn {
    background: #fb981f;
    color: #fff;
    border: 3px solid #fff;
    padding: 12px 30px;
    font-size: 1.5rem;
    font-weight: 900;
    cursor: pointer;
    text-transform: uppercase;
    box-shadow: 0 4px 0 #d87918;
}