style2.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@500&display=swap');
*{
    margin: 0;
    padding: 0;
    font-family: 'poppins',sans-serif;
}
body {
    background: url('photo7.jpg')no-repeat; 
    background-position: center;
    background-size: cover;
    height: 97.5vh;
    width: 80%;
    color: antiquewhite;
    
   
}

.searchBox {
    position: absolute;
    top: 30%;
    left: 50%;
    transform:  translate(-50%,50%);
    background: #2f3640;
    height: 40px;
    border-radius: 40px;
    padding: 10px;

}

.searchBox:hover > .searchInput {
    width: 240px;
    padding: 0 6px;
}

.searchBox:hover > .searchButton {
  background: white;
  color : #2f3640;
}

.searchButton {
    color: white;
    float: right;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #2f3640;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 0.4s;
}

.searchInput {
    border:none;
    background: none;
    outline:none;
    float:left;
    padding: 0;
    color: white;
    font-size: 16px;
    transition: 0.4s;
    line-height: 40px;
    width: 0px;

}

@media screen and (max-width: 620px) {
.searchBox:hover > .searchInput {
    width: 150px;
    padding: 0 6px;
}
}