body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    color: #333;
}

.container {
    max-width: 400px;
    margin: 50px auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    padding: 30px;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
}

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

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

button[type="submit"] {
    background-color: #4CAF50;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
}

button[type="submit"]:hover {
    background-color: #3e8e41;
}

.error-message {
    color: red;
    text-align: center;
    margin-bottom: 15px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }
    
    .container {
        background-color: #252525;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    }
    
    h1, label {
        color: #e0e0e0;
    }
    
    input[type="text"],
    input[type="password"] {
        background-color: #333;
        border: 1px solid #444;
        color: #e0e0e0;
    }
}