body {
    background-image: url("../images/smiley.jpg");
    background-repeat: no-repeat;
    background-position: fixed;
    background-size: 100%;
    color: black;
    font-size: 20px;
    font-family: 'Gloria Hallelujah', cursive;
}
.jumbotron {
    max-height: 650px;
    color: black;
    opacity: .9;
    margin-top: 50px;
    margin-left: auto;
    width: 55%;
}

.app {
    /* margin-top: 10px;
    margin-bottom: 20px; */
    max-width: 50%;
    margin-left: auto;
    color: black;
    font-size: 26px;
    height: 400px;
    text-align: center;
    border-radius: 4px;
}

.card {
    margin-top: 40px;

}

h1 {
    margin-top: 0;
    font-size: 70px;
    font-weight: 500;
}

button {
    -webkit-transition-duration: 0.4s; 
    transition-duration: 0.4s;
    width: 450px;
    margin-left: 50px;
    padding:15px;
    font-size: 20px;
    text-align: center;
    margin-bottom: 5px;
}

button:hover {
    background-color: grey; 
    color: white;
}

img {
    text-align: center;
    margin-top: 30px;
    margin-left: 15%;
    width: 70%;
    border-radius: 25px;
    
}

.card {
    text-align: center;
    margin-bottom: 20px;
}

h2 {
    /* text-align: center; */
    margin-bottom: 30px;
}

h3 {
    text-align: center;
    margin-bottom: 30px;
}

h4 {
    text-align: center;
    margin-bottom: 30px;
}

p {
    text-align: center;
    font-weight: bold;
}