.btn_yellow {
    margin-top: 2rem;
    margin: 2rem auto;
    min-width: 200px;
    text-align: center;
    display : inline-block;
    padding: 1rem 5rem;
    border: 1px solid #333;
    border-radius: 3rem;
    font-weight: 700;
    background-color: #f5e537;
    color: #333;
}