body {
    background-color: #f5f5f5;
}

.login-container {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    max-width: 400px;
    margin: 100px auto;
}

.login-container h1 {
    color: #333;
    text-align: center;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: bold;
}

.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    box-sizing: border-box;
}

.login-container button {
    width: 100%;
    padding: 12px;
    background-color: #4caf50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

.login-container button:hover {
    background-color: #45a049;
}

.login-container .error {
    color: red;
    padding: 10px;
    margin-bottom: 15px;
    background-color: #ffe6e6;
    border-radius: 4px;
    text-align: center;
}

@media (max-width: 600px) {
    .login-container {
        margin: 40px auto;
        padding: 20px;
    }

    .login-container h1 {
        font-size: 22px;
        margin-bottom: 20px;
    }
}

@media (max-width: 480px) {
    .login-container {
        margin: 20px auto;
        padding: 16px;
    }

    .form-group input[type="text"],
    .form-group input[type="password"] {
        padding: 12px 10px;
        font-size: 16px;
    }

    .login-container button {
        padding: 14px;
        font-size: 16px;
    }
}