style.css

body {
    margin: 0px;
    font-size: 10px;
    height: 100vh;
    background: linear-gradient(0deg, rgba(34,193,195,1) 0%, rgba(76,45,253,0.38728995015975143) 100%);
}

.quote-container {
    display: flex;
    align-items: center;
    flex-direction: column;
    height: 100%;
    justify-content: center;
}

.hidden {
    display: none;
}

.quotation {
    font-size: 3rem;
    font-style: italic;
    max-width: 60vw;
    text-align: center;
    margin-bottom: 30px;
}

/*.btn-quote {*/
/*    border-radius: 15px;*/
/*    background-color: #8bc34a94;*/
/*    padding: 15px;*/
/*    font-size: 2rem;*/
/*    font-style: italic;*/
/*}*/

.btn-new-quote {background-image: linear-gradient(to right, #60e35b 0%, #45B649  51%, #DCE35B  100%)}
.btn-new-quote {
    margin: 10px;
    padding: 15px;
    text-align: center;
    transition: 0.5s;
    background-size: 200% auto;
    color: white;
    box-shadow: 0 0 20px #eee;
    border-radius: 10px;
    font-size: 2rem;
    font-style: italic;
}

.btn-new-quote:hover {
    background-position: right center; /* change the direction of the change here */
    color: #fff;
    text-decoration: none;
}