body {
    margin: 0;
    padding: 0;
    background: #87ceeb;
    color: #333;
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.container {
    text-align: center;
}

h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

p {
    font-size: 1.2em;
    margin-bottom: 10px;
}

#score-display, #stats-display {
    font-size: 1.5em;
    margin-bottom: 10px;
}

#mode-toggle {
    padding: 5px 10px;
    font-size: 1em;
    background: #5cb85c;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 10px;
}

#mode-toggle:hover {
    background: #4cae4c;
}

.plane-container {
    width: 800px;
    height: 600px;
    border: 1px solid #333;
    background: #87ceeb;
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.game-over h2 {
    font-size: 2em;
    color: #d9534f;
    margin-bottom: 10px;
}

.game-over p {
    font-size: 1.5em;
    margin-bottom: 20px;
}

.game-over button {
    padding: 10px 20px;
    font-size: 1.2em;
    background: #5cb85c;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.game-over button:hover {
    background: #4cae4c;
}

.hidden {
    display: none;
}