body {
            background-color: #f7f7f7;
            font-family: Arial, sans-serif;
            margin: 0;
        }

        .login-container {
            max-width: 600px;
            margin: 40px auto;
            padding: 30px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 0 14px rgba(0,0,0,0.1);
        }

        h2 {
            text-align: center;
            color: #333;
        }

        form {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        input[type="text"],
        input[type="email"],
        input[type="password"] {
            padding: 10px;
            font-size: 16px;
            border-radius: 6px;
            border: 1px solid #ccc;
            width: calc(50% - 10px);
        }

        input[type="submit"] {
            padding: 12px;
            background-color: #007bff;
            color: white;
            font-weight: bold;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            width: 100%;
        }

        input[type="submit"]:hover {
            background-color: #0056b3;
        }

        .error {
            color: red;
            text-align: center;
            margin-top: 10px;
        }

        .forgot-link {
            margin-top: 20px;
            text-align: center;
            font-size: 14px;
        }

        .forgot-link a {
            color: #007bff;
            text-decoration: none;
        }

        .forgot-link a:hover {
            text-decoration: underline;
        }

        label {
            width: 100%;
            display: block;
        }

        #firma_name {
            width: 100%;
        }

        .error {
            color: #c0392b;
            margin-top: 15px;
            font-weight: bold;
        }