body {
            margin: 0;
            font-family: Arial, sans-serif;
            text-align: center;
            background-color: white;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        main {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            transform: translateY(-100px);
        }
        .header {
            background-color: #3A5795;
            color: white;
            padding: 15px 0;
            font-size: 20px;
            font-weight: bold;
        }
        .login-panel {
            width: 500px;
            margin: 30px auto;
            padding: 30px;
            border: 1px solid #ccc;
            border-radius: 5px;
            background-color: white;
        }
        .login-panel h2 {
            margin-bottom: 20px;
            font-size: 24px;
            font-weight: normal;
        }
        .form-group {
            margin-bottom: 15px;
            text-align: left;
        }
        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-size: 14px;
            font-weight: normal;
        }
        .input-wrapper {
            position: relative;
        }
        .input-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: #aaa;
            font-size: 16px;
            pointer-events: none;
        }
        .input-icon::after {
            content: '';
            position: absolute;
            left: 28px;
            top: 0;
            bottom: 0;
            width: 1px;
            background-color: #ccc;
        }
        .form-group input {
            width: 100%;
            padding: 8px 8px 8px 45px;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .form-group input:focus {
            border-color: #0d83d1;
            box-shadow: 0 0 8px rgba(13, 131, 209, 0.5);
            outline: none;
        }
        .btn-conectar {
            width: 100%;
            padding: 10px;
            background-color: #0d83d1;
            color: white;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            cursor: pointer;
            text-align: center;
        }
        .btn-conectar:hover:not(:disabled) {
            background-color: #0c72b1;
        }
        .btn-conectar:disabled {
            background-color: #ccc;
            cursor: not-allowed;
        }
        .change-link {
            margin-top: 10px;
            text-align: left;
        }
        .change-link a {
            color: #3A5795;
            text-decoration: none;
            font-size: 12px;
        }
        .change-link a:hover {
            text-decoration: underline;
        }
        #message {
            margin-top: 10px;
            padding: 10px;
            border-radius: 4px;
            display: none;
        }
        .error {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        .success {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        .loading {
            background-color: #d1ecf1;
            color: #0c5460;
            border: 1px solid #bee5eb;
        }
        .footer {
            background-color: #f8f9fa;
            color: #6c757d;
            font-size: 12px;
            padding: 15px 20px;
            text-align: center;
            border-top: 1px solid #e9ecef;
            margin-top: auto;
        }
        .footer a {
            color: #3A5795;
            text-decoration: none;
        }
        .footer a:hover {
            text-decoration: underline;
        }