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

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

header {
    background: #0d6efd;
    color: white;
    padding: 15px;
    text-align: center;
}

nav {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

nav a {
    color: white;
    padding: 10px;
    text-decoration: none;
}

.card {
    background: white;
    padding: 15px;
    margin-top: 15px;
    border-radius: 10px;
}

input, button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
}

button {
    background: #0d6efd;
    color: white;
    border: none;
}

@media(max-width:600px){
    nav {
        flex-direction: column;
    }
}