* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: arial;
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('chuck.jpg');
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
}

body:after {
    content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: black;
  opacity: 0.5;
}

.content {
    color: #fff;
    z-index: 1;
    display: flex;
    flex-direction: column;
    width: 1100px;
    max-width: 1100px;
}

h1 {
    margin-bottom: 1rem;
    text-align: center;
}

#jokeCount {
    height: 40px;
    border: none;
    padding: 0 1rem;
    margin-bottom: 1rem;
}

#jokeCount:focus {
    outline: none;
}

#submitBtn {
    height: 40px;
    background: mediumseagreen;
    color: #fff;
    border: none;
    cursor: pointer;
    margin-bottom: 1rem;
}

.jokes {
    padding: 1rem;
    background: #333;
    text-align: center;
}