body{
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #ffe7ba;
}
button{
    position: relative;
    background: white;
    font-size: 26px;
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
    color: black;
    border: none;
    border-radius: 40px;
    cursor: pointer;
    padding: 12px 45px;
    text-align: center;
    transition: 0.5s;
    box-shadow: 0 0 8px -3px gray;
}
.uploadText{
    margin-right: 20px;
}
.fa-upload{
    position: absolute;
    right: 30px;
    bottom: 15px;
    z-index: 2;
}
.fa-check{
    position: absolute;
    z-index: 2;
    right: 96px;
    bottom: 15px;
    color: white;
    opacity: 0;   
}
button:hover{
    box-shadow: none;
}
button::before{
    position: absolute;
    content: '';
    height: 100%;
    border-radius: 40px;
    left: 0;
    bottom: 0;
    background: linear-gradient(45deg,#1b9210, #86ec79);
    z-index: 1;
}
button:focus{
    outline: none;
    box-shadow: none;
}
button:focus > .uploadText{
    animation: disappear 0.2s forwards ease-out; 
}
button:focus > .fa-upload{
    animation: move 0.3s forwards ease,
               disappear 0.2s 1.8s forwards ease-out;
}
button:focus::before{
    animation: fill 1.5s 0.3s forwards ease-in;
}
button:focus > .fa-check{
    animation: tick 0.8s 1.8s forwards ease-in;
}
@keyframes disappear{
    from{
        opacity: 1;
    }
    to{
        opacity: 0;
    }
}
@keyframes move{
    0%{
        transform: translate(0, 0);
    }
    100%{
        transform: translate(-68px, 0) scale(1.4);
        color: white;
    }
}
@keyframes fill{
    from{
        width: 25%;
    }
    to{
        width: 100%;
    }
}
@keyframes tick{
    from{
        opacity: 0;
    }
    to{
        opacity: 1;
        transform: scale(1.5);
    }
}