body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 10px 0;
    display: flex;
    align-items: center;
}

header .logo {
    height: 40px;
    margin: 0 20px;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

main {
    padding: 20px;
}

.join-section, .future-plans {
    background: white;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h2 {
    color: #4CAF50;
}

.invite-button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
}

.invite-button:hover {
    background-color: #45a049;
}

footer {
    text-align: center;
    padding: 10px 0;
    background-color: #333;
    color: white;
    position: absolute;
    width: 100%;
    bottom: 0;
}