style.css

body{
    background: linear-gradient(315deg, #47e8fd, #f76797);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    
}

.container{
    background: linear-gradient(300deg, #ea9dfc, #9ef5c5 );
    padding: 20px ;
    text-align: center;
    border-radius: 10px;
    box-shadow: 5px 5px 6px rgba(0, 0, 0, .3);
    width: 50%;
    
}

.heading{
   
    font-size: 1.6rem;
    font-weight: 600;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

.joke{
    font-size: 1.2rem;
    font-weight: 500;
    color: rgb(135, 35, 250);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.btn{
   width: 18rem;
   padding: .25rem;
   font-size: .9rem;
   font-weight: 500;
   font-family: Verdana, Geneva, Tahoma, sans-serif;
   border-color: rgba(141, 141, 141, 0.692);
   background: linear-gradient(300deg, #ea9dfc, #9ef5c5 );
   border-radius: 10px;
   text-transform: uppercase;
   color: rgb(52, 86, 87);
   cursor: pointer;
   
}

.btn:hover {
    background: linear-gradient(300deg, #f3cafc, #c5fcdd );
}