style.css

@import url('https://fonts.googleapis.com/css?family=Muli&display=swap');

* {
    box-sizing: border-box;
}

body {
    font-family: 'Muli', sans-serif;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    height: 100vh;
    overflow: hidden;
    background-color: rgb(122, 145, 111);
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 50vh;
    width: 80vw;
    background-color: rgb(245, 237, 171);
    border-radius: 10px;
    box-shadow: 10px 24px 16px 7px rgba(0, 0, 0, 0.45);
    -webkit-box-shadow: 10px 24px 16px 7px rgba(0, 0, 0, 0.45);
    -moz-box-shadow: 10px 24px 16px 7px rgba(0, 0, 0, 0.45);
    padding: 20px 40px;
    text-align: center;
}

.container h4 {
    margin: 0;
    opacity: .5;
    letter-spacing: 2px;
}

.joke {
    font-size: 15px;
    letter-spacing: 2px;
    line-height: 30px;
}

.container .btn {
    align-self: center;

}

.btn {
    background-color: rgb(122, 145, 111);
    color: rgb(245, 237, 171);
    outline: none;
    border: none;
    border-radius: 10px;
    padding: 14px 40px;
    font-size: 11px;
    cursor: pointer;
    text-align: center;
}

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

.btn:focus {
    outline: 0;
}


/*cup animation*/

#wrapper {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translate(-50%, -50%);
}

.steam {
    position: absolute;
    height: 150px;
    width: 150px;
    border-radius: 50%;
    background-color: #fff;
    margin-top: -75px;
    margin-left: 75px;
    z-index: 0;
    opacity: 0;
}

#steam1 {
    -webkit-animation: steam1 4s ease-out infinite;
    animation: steam1 4s ease-out infinite;
}

#steam3 {
    -webkit-animation: steam1 4s ease-out 1s infinite;
    animation: steam1 4s ease-out 1s infinite;
}

@-webkit-keyframes steam1 {
    0% {
        transform: translateY(0) translateX(0) scale(0.25);
        opacity: 0.2;
    }

    100% {
        transform: translateY(-200px) translateX(-20px) scale(1);
        opacity: 0;
    }
}

@keyframes steam1 {
    0% {
        transform: translateY(0) translateX(0) scale(0.25);
        opacity: 0.2;
    }

    100% {
        transform: translateY(-200px) translateX(-20px) scale(1);
        opacity: 0;
    }
}

#steam2 {
    -webkit-animation: steam2 4s ease-out 0.5s infinite;
    animation: steam2 4s ease-out 0.5s infinite;
}

#steam4 {
    -webkit-animation: steam2 4s ease-out 1.5s infinite;
    animation: steam2 4s ease-out 1.5s infinite;
}

@-webkit-keyframes steam2 {
    0% {
        transform: translateY(0) translateX(0) scale(0.25);
        opacity: 0.2;
    }

    100% {
        transform: translateY(-200px) translateX(20px) scale(1);
        opacity: 0;
    }
}

@keyframes steam2 {
    0% {
        transform: translateY(0) translateX(0) scale(0.25);
        opacity: 0.2;
    }

    100% {
        transform: translateY(-200px) translateX(20px) scale(1);
        opacity: 0;
    }
}

#cup {
    z-index: 1;
}

#cup-wrapper {
    margin-bottom: 5px;
}

#cup-body {
    position: absolute;
    height: 200px;
    width: 300px;
    border-radius: 0 0 150px 150px;
    background-color: #fff;
    margin: auto;
    display: inline-block;
    overflow: hidden;
    z-index: 1;
}

#cup-shade {
    position: relative;
    height: 300px;
    width: 200px;
    background-color: #F3F3F3;
    display: inline-block;
    margin-left: 42%;
    margin-top: -3px;
    transform: rotate(50deg);
    z-index: 1;
}

#cup-handle {
    position: relative;
    height: 75px;
    width: 80px;
    border-radius: 0 150px 150px 0;
    border: 15px solid #F3F3F3;
    margin-bottom: 95px;
    margin-left: 270px;
    display: inline-block;
    z-index: 0;
}

#saucer {
    position: absolute;
    height: 30px;
    width: 300px;
    border-radius: 0 0 100px 100px;
    background-color: #F9F9F9;
    margin-top: -1px;
    margin-left: 5px;
    z-index: 2;
}

#shadow {
    height: 15px;
    width: 300px;
    border-radius: 50%;
    margin-top: 25px;
    margin-left: 6px;
    background-color: rgb(111,126,100);
}