.login-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
}

.login-card {
    padding: 30px;
    margin-bottom: 40px;
}

.btn-block {
    width: 100%;
    margin-top: 20px;
    padding: 12px;
    font-size: 16px;
}

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 20px;
    text-align: center;
}

@media (max-width: 768px) {
    .login-container {
        padding: 15px;
    }
    
    .login-card {
        padding: 20px;
    }
}