JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="fa" dir="rtl">

  <head>
    <meta charset="UTF-8">
    <title>Title</title>





    <ul id="main-nav">
      <li class="mainPageButton">
        <a href="#mainPageDropdownMenu"> </a>
        <div>
          <div>
            <a href="#">   </a>
          </div>

          <div>
            <a href="#">  </a>
          </div>
          <div>
            <a href="#">   </a>
          </div>

          <div>
            <a href="">   </a>
          </div>
        </div>
      </li>
      <li>
        <a href="#aboutMe"> </a>
      </li>
      <li>
        <a href="#contactUS">  </a>
      </li>
    </ul>
  </head>

  <body>

    <img src="http://ghmahdi.ir/wp-content/uploads/header.jpg" id="headerImage"> </img>
    <div id="wrapper">
      <div id="aboutMe" class="modalLayout">
        <div>
          <a href="#" class="closeBtn"> × </a>
        </div>
        <div class="modal">
          
        </div>
      </div>

      <div id="contactUS" class="modalLayout">
        <div>
          <a href="#" class="closeBtn"> × </a>
        </div>
        <div class="modal">

         
        </div>
      </div>

      <div class="mainMenu">
        <div>
          <a href="#aboutModal">   </a>
        </div>
        <div>
          <a href=" "> </a>
        </div>
        <div>
          <a href="">  </a>
        </div>
        <div>
          <a href="">  </a>
        </div>
      </div>

      <div class="about">
        <p>
          
        </p>
        <p>
          
        </p>
        <p>
          
        </p>
        <p>
          
        </p>
        <p>
          
        </p>
      </div>

      <div id="modalswall">

      </div>
      <div class="bodyModals">
        <p>
          
        </p>
        <p>
          
        </p>
        <p>
          
        </p>
      </div>
      <div class="bodyModals">
        <p>
          
        </p>
        <p>
          
        </p>
        <p>
          
        </p>
     ...

CSS

@keyframes modalAnimation {
  from {
    top: 90vh;
  }
  to {
    top: 95vh;
    background-color: darkcyan;
    box-shadow: 5px 5px 25px #747474;
  }
}

#headerImage {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: fixed;
  padding: 0px;
  margin: 0px;
  z-index: -10000000;
}

#main-nav>li {
  width: 9vw;
  height: 7vh;
  color: #ffffff;
  float: right;
  text-align: center;
  line-height: 7vh;
  margin: 0px;
  font-size: medium;
  z-index: 100;
  list-style-type: none;
  transition: 0.25s;
}

#main-nav {
  background-color: rgba(245, 255, 249, 0.5);
  width: 100%;
  height: 7vh;
  position: fixed;
  z-index: 100;
  float: right;
  transition: all 0.25s;
}

/*
#main-nav:hover {
    background-color: rgba(0,129,129,1);
} */

#main-nav>li:hover {
  background-color: rgb(232, 255, 92);
}

#wall {
  background-color: #d2d2d2;
  width: 100%;
  height: 100vh;
  z-index: -10;
}

* {
  margin: 0px;
  padding: 0px;
}

#main-nav>li>a {
  color: #000;
  text-decoration: none;
}

.modalLayout {
  opacity: 0;
}

.modalLayout:target {
  position: fixed;
  background-color: rgba(0, 0, 0, 0.5);
  width: 100vw;
  height: 100vh;
  opacity: 1;
  transition: all 0.4s;
  z-index: 200;
}

.modal {
  text-align: center;
  padding: 6% 1% 1.7% 1%;
  width: 30vw;
  height: 20vh;
  margin: 30vh 35vw;
  background-color: crimson;
  position: fixed;
  transition: all 0.4s;
  z-index: 10;
  border-radius: 10px;
  box-shadow: 2px 2px #484848;
}

.closeBtn {
  font-size: 35px;
  position: absolute;
  top: 25vh;
  right: 33vw;
  float: right;
  color: #fff;
  font-weight: bold;
  text-decoration: none;
  z-index: 1000;
  cursor: pointer;
  margin-right: 5px;
  transition: all 0.4s;
}

.mainPageButton>div {
  display: none;
}

.mainPageButton:hover>div {
  display: block;
  transition: all 0.25s;
}

.mainPageButton>div>div {
  width: 15vw;
  height: 8vh;
  background-color: #d2d2d2;
  color: #000;
  font-size: medium;
  float: top;
  border-bottom: black 1px solid;
 ...