#plane-game-wrapper {
    width: 400px;
    margin: 20px auto;
    font-family: Arial, sans-serif;
}

#investment-panel {
    text-align: center;
    margin-bottom: 10px;
}

#moneyInput {
    padding: 8px;
    width: 120px;
}

#startButton {
    padding: 8px 15px;
    margin-left: 10px;
    cursor: pointer;
    background: #0073aa;
    color: #fff;
    border: none;
    border-radius: 5px;
}

#countdown {
    text-align: center;
    font-size: 18px;
    margin-bottom: 10px;
}

#game-area {
    position: relative;
    width: 400px;
    height: 500px;
    border: 2px solid #333;
    background: linear-gradient(to top, #87ceeb 0%, #ffffff 100%);
    overflow: hidden;
}

#plane {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 50px;
    transform: translateX(-50%);
    transition: transform 0.1s linear;
}

#flightTrail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#earnings-display {
    text-align: center;
    font-size: 18px;
    margin-top: 10px;
}