* {
   margin: 0;
   padding: 0;
   box-sizing: border-box;
}

a {
   text-decoration: none;
   color: #000;
}

.container {
   width: 100%;
   height: 100vh;
   display: flex;
   align-items: center;
   justify-content: center;
}

.button-wrap {
   width: 200px;
   height: 200px;
   display: flex;
   justify-content: center;
   align-items: center;
   border-radius: 50%;
   overflow: hidden;
   transition: transform .3s cubic-bezier(.24,.45,.32,1);
   will-change: transform;
   position: relative;
   background-color: red;
}

.button-wrap:hover .button {
   background-color: white;
   color: #333;
}

.button {
   width: 100px;
   height: 100px;
   display: flex;
   justify-content: center;
   align-items: center;
   background-color: #333;
   border: 1px solid #333;
   border-radius: 50%;
   font-size: 16px;
   line-height: 1;
   color: white;
   transition: all .3s cubic-bezier(.24,.45,.32,1);
}