body{
    background-color: aquamarine;
}

#container{
    background-color: darkcyan;
    border: 5px solid #f5e4c3; 
    height: 275px;
    width: 750px;
    margin: 0 auto;
    text-align: center;
}

#btn1{
    margin: 50px auto;
    height: 50px;
    width: 250px;
    font-size: 22px;
    background-color: rgb(230, 101, 101);
}

.btn{
    background-color: #35d47d;
    border: 0;
    border-radius: 10px;
    color: #ffffff;
    box-shadow:  0 10px 20px rgba(0,0,0,0.1),0 6px 6px rgba(0,0,0,0.1);;
    /* padding: 14px 40px; */
    /* font-size: 22px; */
    cursor: pointer;
}

.btn:focus{
    outline: 0;
}
.btn:active{
    transform: scale(0.98);
}

#output{
    margin: 25px auto;
    font-size: 26px;
    color: antiquewhite;
}