search.css

body {
    background: #212129;
 }
 

 
 .search-wrapper {
     position: relative;
     transform: translate(-50%, -50%);
     top:50%;
     left:50%;
     float: right;
     margin-right: 60%;
 }
 .search-wrapper.active {}
 
 .search-wrapper .input-holder {    
     height: 70px;
     width:70px;
     overflow: hidden;
     background: rgba(255,255,255,0);
     border-radius:6px;
     position: relative;
     transition: all 0.3s ease-in-out;
 }
 .search-wrapper.active .input-holder {
     width:450px;
     border-radius: 50px;
     background: rgba(0,0,0,0.5);
     transition: all .5s cubic-bezier(0.000, 0.105, 0.035, 1.570);
 }
 .search-wrapper .input-holder .search-input {
     width:100%;
     height: 50px;
     padding:0px 70px 0 20px;
     opacity: 0;
     position: absolute;
     top:0px;
     left:0px;
     background: transparent;
     box-sizing: border-box;
     border:none;
     outline:none;
     font-family:"Open Sans", Arial, Verdana;
     font-size: 16px;
     font-weight: 400;
     line-height: 20px;
     color:#FFF;
     transform: translate(0, 60px);
     transition: all .3s cubic-bezier(0.000, 0.105, 0.035, 1.570);
     transition-delay: 0.3s;
 }
 .search-wrapper.active .input-holder .search-input {
     opacity: 1;
     transform: translate(0, 10px);
 }
 .search-wrapper .input-holder .search-icon {
     width:70px;
     height:70px;
     border:none;
     border-radius:6px;
     background: #FFF;
     padding:0px;
     outline:none;
     position: relative;
     z-index: 2;
     float:right;
     cursor: pointer;
     transition: all 0.3s ease-in-out;
 }
 .search-wrapper.active .input-holder .search-icon {
     width: 50px;
     height:50px;
     margin: 10px;
     border-radius: 30px;
 }
 .search-wrapper .input-holder .search-icon span {
     width:22px;
     height:22px;
     display: inline-block;
     vertical-align: middle;
     position:relative;
     transform: rotate(45deg);
     transition: all .4s cubic-bezier(0.650, -0.600, 0.240, 1.650);
 }
 .search-wrapper.active .input-holder .search-icon span {
     transform: rotate(-45deg);
 }
 .search-wrapper .input-holder .search-icon span::before, .search-wrapper .input-holder .search-icon span::after {
     position: absolute; 
     content:'';
 }
 .search-wrapper .input-holder .search-icon span::before {
     width: 4px;
     height: 11px;
     left: 9px;
     top: 18px;
     border-radius: 2px;
     background: #FE5F55;
 }
 .search-wrapper .input-holder .search-icon span::after {
     width: 20px;
     height: 20px;
     left: 3px;
     top: 0px;
     border-radius: 16px;
     border: 4px solid #FE5F55;
 }
 .search-wrapper .close {
     position: absolute;
     z-index: 1;
     top:24px;
     right:20px;
     width:25px;
     height:25px;
     cursor: pointer;
     transform: rotate(-180deg);
     transition: all .3s cubic-bezier(0.285, -0.450, 0.935, 0.110);
     transition-delay: 0.2s;
 }
 .search-wrapper.active .close {
     right:-50px;
     transform: rotate(45deg);
     transition: all .6s cubic-bezier(0.000, 0.105, 0.035, 1.570);
     transition-delay: 0.5s;
 }
 .search-wrapper .close::before, .search-wrapper .close::after {
     position:absolute;
     content:'';
     background: #FE5F55;
     border-radius: 2px;
 }
 .search-wrapper .close::before {
     width: 5px;
     height: 25px;
     left: 10px;
     top: 0px;
 }
 .search-wrapper .close::after {
     width: 25px;
     height: 5px;
     left: 0px;
     top: 10px;
 }
 
 .linesearch {
    display: flex; /* equal height of the children */
  }