body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    color: #222;
    margin: 0;
    padding: 0;
}

.nav {
    background: #004d61;
    padding: 10px;
    text-align: center;
}

.nav a {
    color: #ffffff;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}

.nav a:focus, .nav a:hover {
    text-decoration: underline;
}

.card {
    background: #ffffff;
    margin: 20px auto;
    padding: 20px;
    max-width: 800px;
    border-radius: 12px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.button {
    background: #007a8c;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.button:focus, .button:hover {
    background: #005f66;
}

.status {
    color: red;
    margin-bottom: 10px;
}