*{
    box-sizing: border-box;
}

body{
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-image: linear-gradient(90deg, #7d5fff, #7158e2);

}

.search{
    position: relative;
    height: 50px;
    border: 1px solid red;
}

.search .input{
    background-color: #fff;
    border: 0;
    font-size: 18px;
    padding: 15px;
    height: 50px;
    width: 50px;
    transition: width 0.3s ease;   

}

.btn{
    background-color: #fff;
    border: 0;
    cursor: pointer;
    font-size: 24px;
    height: 50px;
    width: 50px;
    position: absolute;
    top: 0;
    left: 0;
    transition: transform 0.3s ease;
    
}

.btn:focus, .input:focus{
    outline: none;
}

.search.active .input{

    width: 200px;

}

.search.active .btn{
    transform: translateX(108px);
}