body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f4f6f9;
}

.container {
    width: 90%;
    margin: auto;
}

.navbar {
    background: #333;
    color: #fff;
    padding: 15px;
}

.navbar a {
    color: #fff;
    margin-right: 15px;
    text-decoration: none;
}

.card {
    background: #fff;
    padding: 20px;
    margin: 15px 0;
    border-radius: 6px;
}

input,
button {
    padding: 10px;
    width: 100%;
    margin: 10px 0;
}

button {
    background: #007bff;
    color: white;
    border: none;
}

@media(max-width:768px) {
    .container {
        width: 100%;
        padding: 10px;
    }
}