body {
    font-family: Arial, sans-serif;
    background-color: #f4f6f9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.login-container {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    width: 320px;
}
h2 { text-align: center; color: #333; }

.form-group { margin-bottom: 15px; }

label { display: block; margin-bottom: 5px; color: #666; }

input[type="text"], input[type="password"] {
    width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 4px; box-sizing: border-box;
}

button {
    width: 100%; padding: 10px; background-color: #007bff; border: none; color: white; border-radius: 4px; cursor: pointer; font-size: 16px;
}
button:hover { background-color: #0056b3; }

.error { color: red; margin-bottom: 15px; font-size: 14px; text-align: center; }
.logout-msg { color: green; margin-bottom: 15px; font-size: 14px; text-align: center; }