/* From cssbuttons.io by @marcos700x */
button {
    background-color: #fff;
    z-index: 1;
    position: relative;
    overflow: hidden;
    color: red;
    border: 3px solid red;
    padding: 10px 20px;
    font-family: Arial;
    font-weight: 800;
    font-size: 1.05em;
    border-radius: 15px;
    transition: transform .3s ease, color .5s ease;
   }
   
   button::before {
    content: '';
    inset: 0 0 0 0;
    margin: auto;
    height: 0px;
    width: 0px;
    position: absolute;
    background-color: red;
    z-index: -1;
    border-radius: 50%;
    transition: all .7s ease;
   }
   
   button:active {
    transform: scale(.9);
   }
   
   button:hover {
    color: #fff;
   }
   
   button:hover:before {
    height: 200px;
    width: 200px;
   }