body{
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(to left bottom, lightblue,lightpink,lightblue) no-repeat;
}
.container{
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-size: 1.5rem;
    background-color: rgba(255,255,255, .3);
    padding: 1rem;
    box-shadow: 0 6px 10px rgba(0,0,0, 03);
    border-radius: 15px;
    width: 85%;
    text-align: center;
    color: darkgreen;
}
.header{
    font-size: 35px;
    font-weight: 200;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
    text-shadow: 5px 5px 2px rgba(0,0,0, 03);
    letter-spacing: 2px;


}
.joke{
    font-size: 25px;
    font-weight: 500;
    margin: 40px;
}
.btn{
    font-size: 18px;
    font-weight: 700;
    border-radius: 5px;
    cursor: pointer;
    padding: 10px;
    background-color: rgba(255, 255,255, rgba(255,255,255, .3));
    border-color: rgba(255,255,255,6);
    text-transform: uppercase;
    width: 30%;
    color: darkgreen;
}
.btn:hover{
    background-color: rgba(255,255,255, .5);
    box-shadow: 0 4px 4px rgba(0,0,0, 03);
    transition: all 300ms ease;
}