JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <header class="start grid" style="background-image: url(img/3.jpg);">
      <div class="header-content grid">
        <h1>We can make yoer best web sites</h1>
         <div class="header-buttons">
          <a class="button" href="#">Go</a>
          <a class="button button-grey" href="#">Read</a>
         </div>
      </div>
    </header>

    <div class="grid-menu">
      <div></div>
      <div></div>
      <div></div>
      <div></div>
      <div></div>
    </div>

    <div class="grid-parti grid">
     <div class="grid-parti1 grid" style="background-image: url(img/prf/1.jpg);"><h2>item 1</h2></div>
     <div class="grid-parti1 grid" style="background-image: url(img/prf/2.jpg);"><h2>item 2</h2></div>
     <div class="grid-parti1 grid" style="background-image: url(img/prf/3.jpg);"><h2>item 3</h2></div>
     <div class="grid-parti1 grid" style="background-image: url(img/prf/4.jpg);"><h2>item 4</h2></div>
     <div class="grid-parti1 grid" style="background-image: url(img/prf/5.jpg);"><h2>item 5</h2></div>
     <div class="grid-parti1 grid" style="background-image: url(img/prf/6.jpg);"><h2>item 6</h2></div>
     <div class="grid-parti1 grid" style="background-image: url(img/prf/7.jpg);"><h2>item 7</h2></div>
     <div class="grid-parti1 grid" style="background-image: url(img/prf/8.jpg);"><h2>item 8</h2></div>
     <div class="grid-parti1 grid" style="background-image: url(img/prf/9.jpg);"><h2>item 9</h2></div>
    </div>

    <div class="grid-call">
      <div class="grid-call1"></div>
    </div>

    <div class="grid-summ">
      <div class="grid-summ1"><input type="text"></div>
      <div class="grid-summ1"><input type="text"></div>
    </div>

    <script>new WOW().init();</script>
  	<script src="js/wow.min.js"></script>
  	<script src="js/main.js"></script>
    </body>

CSS

*, *:before, *:after{
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body
{
  font-size: 16px;
  min-width: 320px;
  position: relative;
  line-height: 1.75;
  overflow-x: hidden;
}
input[type="text"] {
width: 25%;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
border-radius: 4px;
padding: 0.5%;
border: 2px solid #3fbaeb;
font-size: 120%;
}
.grid{
  display: grid;
}
.grid-parti{
  z-index: 1;
padding: 10px;
grid-template-columns: repeat(4, 1fr);
grid-gap: 10px;
}
.grid-parti1:before{
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(94, 91, 96, 0.65);
}
.grid-parti1:hover:before{
  background-color: rgba(94, 91, 96, 0.8);
}

.grid-parti1{
  z-index: 1;
  min-height: 32vh;
  color: white;
  background-position: center;
  background-size: cover;
  align-content: center;
  text-align: center;
  padding: 10px;
  position: relative;
  transition: .5s ease;
  cursor: pointer;

}
.grid-parti1:hover{
    z-index: 1;
  color: #3fbaeb;
}
.grid-parti1:nth-child(1){
  grid-column: 1/3;
}
.grid-parti1:nth-child(5){
  grid-column: 2/4;
}
.grid-parti1:nth-child(6){
  grid-column: 4;
  grid-row: 2/4;
}



.grid-call{
    display: grid;
  grid-template-columns: 1fr;
  grid-column-gap: 15%;
  grid-auto-rows: 100%;
  margin-top: 6%;
  text-align: center;
}



.grid-call1{

  padding:1.5%;
} 
.start
{ 
  min-height: 100vh;
  background-size: cover;
  background-position: center;
  position: relative;
}
.header-content{
    color: white;
  text-align: center;
  align-content: center;
  background-color: rgba(94, 91, 96, 0.8);
    min-height: 100vh;
    padding: 3% 7%;

}
h1{
    font-size: 50px;
    margin: 20px 0; 
    line-height: 1.5;
}
.button {
  cursor: pointer;
  text-decoration: none;
  position: relative;
  background: beige;
  text-align: center;
  display: inline-block;
  border-radius: 5px;
  padding: 10px 55px;
  font-size: 20px;
  margin: 20px;
  color: white;
  background: #55acee;
  box-shadow: 0...