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

.header, .footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1em 0;
}

.header nav a {
    color: white;
    margin: 0 10px;
    text-decoration: none;
}

.container {
    padding: 20px;
}

.login-form, .container {
    background-color: white;
    padding: 20px;
    margin: 50px auto;
    max-width: 600px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.login-form h2, .container h2 {
    margin-top: 0;
}

.login-form label, .login-form input, .login-form button {
    display: block;
    width: 100%;
    margin-bottom: 10px;
}

.login-form input {
    padding: 10px;
    border: 1px solid #ccc;
}

.login-form button {
    background-color: #333;
    color: white;
    padding: 10px;
    border: none;
}

.login-form .error {
    color: red;
    font-size: 0.9em;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table, th, td {
    border: 1px solid #ccc;
}

th, td {
    padding: 10px;
    text-align: left;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #333;
    color: white;
    text-decoration: none;
    margin-bottom: 20px;
}

.btn:hover {
    background-color: #555;
}