body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
}

.container {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    text-align: center;
    width: 80%;
    max-width: 800px;
}

h1 {
    margin-bottom: 20px;
    color: #333;
}

.controls {
    margin-bottom: 20px;
}

.controls label {
    margin-right: 10px;
}

.controls select {
    padding: 5px;
    font-size: 1em;
}

button {
    margin-left: 10px;
    padding: 5px 10px;
    border: none;
    background-color: #007BFF;
    color: #fff;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
}

button:hover {
    background-color: #0056b3;
}

#warDetails, #comparison, #timeline {
    margin-top: 20px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background: #fff;
    display: none;
}

#warDetails.active, #comparison.active, #timeline.active {
    display: block;
}