body {
    background-color: rgb(255, 255, 255)
}
h1 {
    font-family:Arial, Helvetica, sans-serif;
    text-align: center;
    color: navy;
}
.top {
    margin: 0% 15%;
    font-family:Arial, Helvetica, sans-serif;
    text-align: center;
    color: navy;
}
.container {
    height: 100px;
    position: relative;
    border: none;
    align-items: center;
    justify-content: center;
    display: flex;
  }
.center {
    margin: 0;
    position: absolute;
    display: inline-block;
    
    -ms-transform: translateY(-50%, -50%);
    transform: translateY(-50%, -50%);
}
.bttn {
    font-family:Arial, Helvetica, sans-serif;
    text-align: center;
    color: navy;
    padding: 4px 44px;
    width: 100%;
    font-size: large;
    border-color: navy;
    border-radius: 4px;
    display: inline-block;s
    margin: auto;
    background-color: white;
}
.bttn:hover {
    background-color:navy;
    color: white;
    transition: 0.8s;
}