body {
            font-family: Arial, sans-serif;
            background: #f5f6fa;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100vh;
        }
        .login-box {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
            width: 320px;
        }
        .login-box h2 {
            text-align: center;
            margin-bottom: 1.5rem;
        }
        input {
            width: 100%;
            padding: .7rem;
            margin: .5rem 0;
            border: 1px solid #ccc;
            border-radius: 5px;
        }
        button {
            width: 100%;
            padding: .7rem;
            background: #0066cc;
            border: none;
            color: white;
            font-weight: bold;
            cursor: pointer;
            border-radius: 5px;
        }
        button:hover {
            background: #004a99;
        }
        .message {
            text-align: center;
            margin-top: 1rem;
            color: #d63031;
            min-height: 1.5em;
        }