body {
    margin : 0px; 
    overflow: hidden;
}


button {
    width: 35%;
    height: 50px;
}

.flat {
    margin: 0 10px;
    border-radius: 25px;
    font-size: 25px;
    border: 0;
    background: rgb(208, 65, 57);
    color: #fff;
}

.flat:hover {
    background: #851c17;
  }