* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
    border: none;
    text-transform: capitalize;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}
.container {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding-bottom: 60px;
    background: linear-gradient(rgba(0,0,0,.3), rgba(0,0,0,.3)), url(https://source.unsplash.com/random) no-repeat;
    background-size: cover;
    background-position: center;
}
.container .content {
    text-align: center;
}
.container .content h3 {
    font-size: 40px;
    color: #fff;
    padding: 5px 0;
}
.container .content p {
    font-size: 25px;
    color: #fff;
    padding: 5px 0;
}
.container .content button {
    height: 50px;
    width: 200px;
    color: #333;
    background: #fff;
    cursor: pointer;
    font-size: 20px;
    margin-top: 10px;
}