body {
    font-family: Arial, sans-serif;
    background-color: #222;
    color: white;
    text-align: center;
    margin: 0;
    padding: 0;
}

header {
    padding: 20px;
    font-size: 24px;
    font-weight: bold;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 15px;
    background-color: #333;
    padding: 10px 0;
}

nav ul li {
    display: inline;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    padding: 5px 10px;
}

nav ul li a:hover {
    background-color: #555;
    border-radius: 5px;
}

.card-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

.card {
    background: #444;
    padding: 20px;
    border-radius: 10px;
    width: 250px;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.icon {
    font-size: 40px;
}

button {
    background-color: #007BFF;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 20px;
}

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