should be done

src/Components/RedirectModal.js

+/*Copyright (C) 2019 Centro de Computacao Cientifica e Software Livre
+Departamento de Informatica - Universidade Federal do Parana
+
+This file is part of Plataforma Integrada MEC.
+
+Plataforma Integrada MEC is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Plataforma Integrada MEC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with Plataforma Integrada MEC.  If not, see <http://www.gnu.org/licenses/>.*/
+
+import React, {useEffect, useState} from 'react'
+import styled from 'styled-components'
+import { Button } from '@material-ui/core';
+import Modal from '@material-ui/core/Modal';
+import Backdrop from '@material-ui/core/Backdrop';
+import Fade from '@material-ui/core/Fade';
+import CloseIcon from '@material-ui/icons/Close';
+
+function CloseModalButton (props) {
+    return (
+        <StyledCloseModalButton onClick={props.handleClose}>
+            <CloseIcon/>
+        </StyledCloseModalButton>
+    )
+}
+
+const StyledCloseModalButton = styled(Button)`
+    display : inline-block;
+    position : absolute !important;
+    right : 8px;
+    top : 8px;
+    float : right !important;
+    margin-right : -8px !important;
+    background : transparent !important;
+    min-width: 0 !important;
+
+    width : 40px;
+`
+
+
+export default function RedirectModal (props) {
+
+    return (
+        <StyledModal
+            aria-labelledby="transition-modal-title"
+            aria-describedby="transition-modal-description"
+            open={props.open}
+            animation={true}
+            centered={true}
+            onClose={props.handleClose}
+            closeAfterTransition
+            BackdropComponent={Backdrop}
+            BackdropProps={{
+                timeout: 500,
+            }}
+        >
+            <Fade in={props.open}>
+                <Container>
+                    <CloseModalButton handleClose={props.handleClose}/>
+                    <Header>
+                        <span style={{width:"32px"}}/>
+                        <h2>Você será redirecionado para outro site</h2>
+                    </Header>
+                    <Content>
+                        <span style={{fontWeight : "600"}}>Uma nova aba ou janela irá abrir, deseja continuar?</span>
+                        <div style={{paddingTop : "20px", paddingBottom : "10px"}}>
+                            Lembre-se de que você pode reportar caso considere o conteúdo abusivo/ofensivo ou caso a página não corresponda a descrição apresentada.
+                        </div>
+                        <section style={{display : "flex", flexDirection : "row", justifyContent : "center"}}>
+                            <ButtonGrey onClick={props.handleClose}>CANCELAR</ButtonGrey>
+                            <a href={props.link} target="_blank" rel="noreferrer noopener" style={{textDecoration : "none !important"}}><ButtonOrange>CONTINUAR</ButtonOrange></a>
+                        </section>
+                    </Content>
+                </Container>
+            </Fade>
+        </StyledModal>
+    )
+}
+
+const ButtonOrange = styled(Button)`
+    box-shadow : 0 2px 5px 0 rgba(0,0,0,.26) !important;
+    background-color : #ff7f00 !important;
+    color : #fff !important;
+    text-decoration : none !important;
+    text-transform : uppercase !important;
+    outline : none !important;
+    text-align : center !important;
+    max-height : 36px;
+    margin-top : 5px !important;
+    font-size : 14px !important;
+    font-weight : 600 !important;
+`
+
+
+const ButtonGrey = styled(Button)`
+    &:hover {
+        background-color : rgba(158,158,158,0.2) !important;
+    }
+    margin-top : 5px !important;
+    margin-right : 15px !important;
+    background-color : transparent !important;
+    color : #666 !important;
+    text-decoration : none !important;
+    outline : none !important;
+    text-align : center !important;
+    font-size : 14px !important;
+    font-weight : 600 !important;
+
+`
+
+const Content = styled.div`
+    color : #666;
+    padding : 20px 30px;
+    overflow : visible;
+    text-align : center;
+    font-size : 14px;
+`
+const Header = styled.div`
+    display : flex;
+    flex-direction : row;
+    align-items : center;
+    justify-content : space-between;
+    h2 {
+        font-size : 26px;
+        font-weight : lighter;
+        color : #666
+        padding : 10px 20px 0 20px;
+
+    }
+`
+
+const StyledModal = styled(Modal)`
+    .djXaxP{
+        margin : 0 !important;
+    }
+    display : flex;
+    align-items: center;
+    justify-content : center;
+    text-align : center;
+    padding : 10px !important;
+    max-width : none;
+    max-height : none;
+`
+const Container = styled.div`
+    box-sizing : border-box;
+    box-shadow : 0 7px 8px -4px rgba(0,0,0,.2),0 13px 19px 2px rgba(0,0,0,.14),0 5px 24px 4px gba(0,0,0,.12);
+    background-color : white;
+    align : center;
+    display : flex;
+    flex-direction : column;
+    min-width : 240px;
+    max-height : none;
+    position : relative;
+    padding : 10px;
+    border-radius : 4px;
+    @media screen and (min-width : 700px) {
+        max-width : 395px;
+        height : 326px;
+    }
+    @media screen and (max-width : 699px) {
+        width : 100%;
+        height : 100%;
+    }
+`