body {
    background-color: #f8f9fa;
}
.login-container {
    max_width: 400px;
    margin: 100px auto;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}
.login-header {
    text-align: center;
    margin-bottom: 30px;
}
.error-msg {
    color: red;
    font-size: 0.9em;
    text-align: center;
}